docs: add CACT server deploy playbook

Add an operator runbook for standing up the CloudAxe Coder Team on a new Linux server.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/TEAM_MEMBERS

@@ -1,4 +1,5 @@
 adamdotdevin
+arvsrn
 Brendonovich
 fwang
 Hona
@@ -7,11 +8,16 @@ jayair
 jlongster
 kitlangton
 kommander
+ludvigrask
 MrMushrooooom
+neriousy
 nexxeln
 R44VC0RP
 rekram1-node
 thdxr
 simonklee
+Slickstef11
+usrnk1
 vimtor
-starptech
+StarpTech
+vaprdev

.github/actions/setup-bun/action.yml

@@ -8,12 +8,22 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - name: Get baseline download URL
+    # node-gyp@latest (invoked via bunx for native install scripts) requires Node >=22;
+    # some runner images ship an older system Node on PATH
+    - name: Setup Node
+      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+      with:
+        node-version: "24"
+
+    - name: Get Bun version and baseline download URL
       id: bun-url
       shell: bash
       run: |
+        V=$(node -p "require('./package.json').packageManager.split('@')[1]")
+        # Bun 1.4.2 includes the patched peer-variant fix in oven-sh/bun#33646.
+        if [ "$RUNNER_OS" = "Windows" ]; then V=1.4.2; fi
+        echo "version=$V" >> "$GITHUB_OUTPUT"
         if [ "$RUNNER_ARCH" = "X64" ]; then
-          V=$(node -p "require('./package.json').packageManager.split('@')[1]")
           case "$RUNNER_OS" in
             macOS)   OS=darwin ;;
             Linux)   OS=linux ;;
@@ -23,9 +33,10 @@ runs:
         fi
 
     - name: Setup Bun
+      id: setup-bun
       uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
       with:
-        bun-version-file: ${{ !steps.bun-url.outputs.url && 'package.json' || '' }}
+        bun-version: ${{ !steps.bun-url.outputs.url && steps.bun-url.outputs.version || '' }}
         bun-download-url: ${{ steps.bun-url.outputs.url }}
 
     - name: Get cache directory
@@ -38,24 +49,16 @@ runs:
       uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
       with:
         path: ${{ steps.cache.outputs.dir }}
-        key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}
+        key: ${{ runner.os }}-bun-${{ steps.setup-bun.outputs.bun-version }}-${{ hashFiles('**/bun.lock') }}
         restore-keys: |
-          ${{ runner.os }}-bun-
+          ${{ runner.os }}-bun-${{ steps.setup-bun.outputs.bun-version }}-
 
     - name: Install setuptools for distutils compatibility
       run: python3 -m pip install setuptools || pip install setuptools || true
       shell: bash
 
     - name: Install dependencies
-      run: |
-        # Workaround for patched peer variants
-        # e.g. ./patches/ for standard-openapi
-        # https://github.com/oven-sh/bun/issues/28147
-        if [ "$RUNNER_OS" = "Windows" ]; then
-          bun install --linker hoisted ${{ inputs.install-flags }}
-        else
-          bun install ${{ inputs.install-flags }}
-        fi
+      run: bun install ${{ inputs.install-flags }}
       shell: bash
 
     - name: Save Bun dependencies
@@ -63,4 +66,4 @@ runs:
       uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
       with:
         path: ${{ steps.cache.outputs.dir }}
-        key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}
+        key: ${{ runner.os }}-bun-${{ steps.setup-bun.outputs.bun-version }}-${{ hashFiles('**/bun.lock') }}

.github/workflows/beta.yml

@@ -1,37 +0,0 @@
-name: beta
-
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: "0 * * * *"
-
-jobs:
-  sync:
-    runs-on: blacksmith-4vcpu-ubuntu-2404
-    permissions:
-      contents: write
-      pull-requests: write
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
-        with:
-          fetch-depth: 0
-
-      - name: Setup Bun
-        uses: ./.github/actions/setup-bun
-
-      - name: Setup Git Committer
-        id: setup-git-committer
-        uses: ./.github/actions/setup-git-committer
-        with:
-          opencode-app-id: ${{ vars.OPENCODE_APP_ID }}
-          opencode-app-secret: ${{ secrets.OPENCODE_APP_SECRET }}
-
-      - name: Install OpenCode
-        run: bun i -g opencode-ai
-
-      - name: Sync beta branch
-        env:
-          GH_TOKEN: ${{ steps.setup-git-committer.outputs.token }}
-          OPENCODE_API_KEY: ${{ secrets.OPENCODE_API_KEY }}
-        run: bun script/beta.ts

.github/workflows/compliance-close.yml

@@ -34,10 +34,48 @@ jobs:
 
             const now = Date.now();
             const twoHours = 2 * 60 * 60 * 1000;
+            const orgMemberAssociations = new Set(['OWNER', 'MEMBER']);
+            const agentLogin = 'opencode-agent[bot]';
+            const { data: file } = await github.rest.repos.getContent({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              path: '.github/TEAM_MEMBERS',
+              ref: 'dev',
+            });
+            const teamMembers = new Set(
+              Buffer.from(file.content, 'base64')
+                .toString()
+                .split('\n')
+                .map((line) => line.trim().toLowerCase())
+                .filter(Boolean)
+            );
+
+            function isExempt(item) {
+              const login = item.user?.login?.toLowerCase();
+              return (
+                login === agentLogin ||
+                orgMemberAssociations.has(item.author_association) ||
+                (login && teamMembers.has(login))
+              );
+            }
 
             for (const item of items) {
               const isPR = !!item.pull_request;
               const kind = isPR ? 'PR' : 'issue';
+              const login = item.user?.login;
+
+              if (isExempt(item)) {
+                core.info(`Skipping ${kind} #${item.number}; author ${login || 'unknown'} is exempt`);
+                try {
+                  await github.rest.issues.removeLabel({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    issue_number: item.number,
+                    name: 'needs:compliance',
+                  });
+                } catch (e) {}
+                continue;
+              }
 
               const { data: comments } = await github.rest.issues.listComments({
                 owner: context.repo.owner,

.github/workflows/deploy.yml

@@ -35,6 +35,7 @@ jobs:
 
       - run: bun sst deploy --stage=${{ github.ref_name }}
         env:
+          GITHUB_TOKEN: ${{ github.token }}
           CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           PLANETSCALE_SERVICE_TOKEN_NAME: ${{ secrets.PLANETSCALE_SERVICE_TOKEN_NAME }}
           PLANETSCALE_SERVICE_TOKEN: ${{ secrets.PLANETSCALE_SERVICE_TOKEN }}

.github/workflows/duplicate-issues.yml

@@ -17,12 +17,31 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Check exempt issue author
+        id: author
+        run: |
+          LOGIN="${{ github.event.issue.user.login }}"
+          ASSOCIATION="${{ github.event.issue.author_association }}"
+
+          if [ "$LOGIN" = "opencode-agent[bot]" ] ||
+             [ "$ASSOCIATION" = "OWNER" ] ||
+             [ "$ASSOCIATION" = "MEMBER" ] ||
+             grep -qxiF "$LOGIN" .github/TEAM_MEMBERS; then
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+            echo "Skipping issue automation for exempt author: $LOGIN ($ASSOCIATION)"
+          else
+            echo "skip=false" >> "$GITHUB_OUTPUT"
+          fi
+
       - uses: ./.github/actions/setup-bun
+        if: steps.author.outputs.skip != 'true'
 
       - name: Install opencode
+        if: steps.author.outputs.skip != 'true'
         run: curl -fsSL https://opencode.ai/install | bash
 
       - name: Check duplicates and compliance
+        if: steps.author.outputs.skip != 'true'
         env:
           OPENCODE_API_KEY: ${{ secrets.OPENCODE_API_KEY }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -35,9 +54,10 @@ jobs:
               "webfetch": "deny"
             }
         run: |
-          opencode run -m opencode/claude-sonnet-4-6 "A new issue has been created:
+          opencode run -m opencode/gpt-6-luna --variant high "A new issue has been created:
 
           Issue number: ${{ github.event.issue.number }}
+          Issue author association: ${{ github.event.issue.author_association }}
 
           Lookup this issue with gh issue view ${{ github.event.issue.number }}.
 
@@ -49,6 +69,8 @@ jobs:
 
           Check whether the issue follows our contributing guidelines and issue templates.
 
+          If the issue author association is OWNER or MEMBER, skip this compliance check. Do not add the needs:compliance label for organization-owned issues.
+
           This project has three issue templates that every issue MUST use one of:
 
           1. Bug Report - requires a Description field with real content
@@ -83,7 +105,7 @@ jobs:
 
           Based on your findings, post a SINGLE comment on issue #${{ github.event.issue.number }}. Build the comment as follows:
 
-          If the issue is NOT compliant, start the comment with:
+          If the issue is NOT compliant and the author association is not OWNER or MEMBER, start the comment with:
           <!-- issue-compliance -->
           Then explain what needs to be fixed and that they have 2 hours to edit the issue before it is automatically closed. Also add the label needs:compliance to the issue using: gh issue edit ${{ github.event.issue.number }} --add-label needs:compliance
 
@@ -129,12 +151,31 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Check exempt issue author
+        id: author
+        run: |
+          LOGIN="${{ github.event.issue.user.login }}"
+          ASSOCIATION="${{ github.event.issue.author_association }}"
+
+          if [ "$LOGIN" = "opencode-agent[bot]" ] ||
+             [ "$ASSOCIATION" = "OWNER" ] ||
+             [ "$ASSOCIATION" = "MEMBER" ] ||
+             grep -qxiF "$LOGIN" .github/TEAM_MEMBERS; then
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+            echo "Skipping issue automation for exempt author: $LOGIN ($ASSOCIATION)"
+          else
+            echo "skip=false" >> "$GITHUB_OUTPUT"
+          fi
+
       - uses: ./.github/actions/setup-bun
+        if: steps.author.outputs.skip != 'true'
 
       - name: Install opencode
+        if: steps.author.outputs.skip != 'true'
         run: curl -fsSL https://opencode.ai/install | bash
 
       - name: Recheck compliance
+        if: steps.author.outputs.skip != 'true'
         env:
           OPENCODE_API_KEY: ${{ secrets.OPENCODE_API_KEY }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -147,10 +188,13 @@ jobs:
               "webfetch": "deny"
             }
         run: |
-          opencode run -m opencode/claude-sonnet-4-6 "Issue #${{ github.event.issue.number }} was previously flagged as non-compliant and has been edited.
+          opencode run -m opencode/gpt-6-luna --variant high "Issue #${{ github.event.issue.number }} was previously flagged as non-compliant and has been edited.
+          Issue author association: ${{ github.event.issue.author_association }}
 
           Lookup this issue with gh issue view ${{ github.event.issue.number }}.
 
+          If the issue author association is OWNER or MEMBER, remove the needs:compliance label if present, delete the previous compliance comment if present, and do not post a new comment.
+
           Re-check whether the issue now follows our contributing guidelines and issue templates.
 
           This project has three issue templates that every issue MUST use one of:

.github/workflows/models-snapshot.yml

@@ -0,0 +1,62 @@
+name: models-snapshot
+
+permissions:
+  contents: write
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 12 * * *"
+
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: false
+
+jobs:
+  refresh:
+    if: github.repository == 'anomalyco/opencode'
+    runs-on: blacksmith-4vcpu-ubuntu-2404
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          persist-credentials: false
+          ref: v2
+
+      # The refresh script only needs `fetch`; skip the monorepo install.
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+        with:
+          bun-version-file: package.json
+
+      - name: Setup git committer
+        uses: ./.github/actions/setup-git-committer
+        with:
+          opencode-app-id: ${{ vars.OPENCODE_APP_ID }}
+          opencode-app-secret: ${{ secrets.OPENCODE_APP_SECRET }}
+
+      - name: Refresh snapshot
+        run: bun packages/core/script/update-models-snapshot.ts
+
+      - name: Commit changes
+        run: |
+          set -euo pipefail
+
+          FILE="packages/core/src/models-dev/snapshot.txt"
+
+          if [ -z "$(git status --short -- "$FILE")" ]; then
+            echo "No changes to commit"
+            echo "### models.dev snapshot" >> "$GITHUB_STEP_SUMMARY"
+            echo "Status: no changes" >> "$GITHUB_STEP_SUMMARY"
+            exit 0
+          fi
+
+          git add "$FILE"
+          git commit -m "chore(core): refresh bundled models.dev snapshot"
+
+          git pull --rebase --autostash origin v2
+          git push origin HEAD:v2 --no-verify
+
+          echo "### models.dev snapshot" >> "$GITHUB_STEP_SUMMARY"
+          echo "Status: committed $(git rev-parse --short HEAD)" >> "$GITHUB_STEP_SUMMARY"

.github/workflows/publish.yml

@@ -219,7 +219,6 @@ jobs:
 
   build-electron:
     needs:
-      - build-cli
       - version
     if: github.repository == 'anomalyco/opencode'
     continue-on-error: false
@@ -316,16 +315,14 @@ jobs:
         env:
           OPENCODE_VERSION: ${{ needs.version.outputs.version }}
           OPENCODE_CHANNEL: ${{ (github.ref_name == 'beta' && 'beta') || 'prod' }}
-          OPENCODE_CLI_ARTIFACT: ${{ (runner.os == 'Windows' && 'opencode-cli-windows') || 'opencode-cli' }}
           RUST_TARGET: ${{ matrix.settings.target }}
-          GH_TOKEN: ${{ github.token }}
-          GITHUB_RUN_ID: ${{ github.run_id }}
 
       - name: Build
         run: bun run build
         working-directory: packages/desktop
         env:
           NODE_OPTIONS: --max-old-space-size=4096
+          OPENCODE_VERSION: ${{ needs.version.outputs.version }}
           OPENCODE_CHANNEL: ${{ (github.ref_name == 'beta' && 'beta') || 'prod' }}
           SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
           SENTRY_ORG: ${{ vars.SENTRY_ORG }}
@@ -343,8 +340,7 @@ jobs:
         env:
           OPENCODE_CHANNEL: ${{ (github.ref_name == 'beta' && 'beta') || 'prod' }}
           GH_TOKEN: ${{ steps.committer.outputs.token }}
-          CSC_LINK: ${{ secrets.APPLE_CERTIFICATE }}
-          CSC_KEY_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
+          CSC_KEYCHAIN: build.keychain
           APPLE_API_KEY: ${{ runner.temp }}/apple-api-key.p8
           APPLE_API_KEY_ID: ${{ secrets.APPLE_API_KEY }}
           APPLE_API_ISSUER: ${{ secrets.APPLE_API_ISSUER }}

.github/workflows/triage.yml

@@ -16,13 +16,32 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Check exempt issue author
+        id: author
+        run: |
+          LOGIN="${{ github.event.issue.user.login }}"
+          ASSOCIATION="${{ github.event.issue.author_association }}"
+
+          if [ "$LOGIN" = "opencode-agent[bot]" ] ||
+             [ "$ASSOCIATION" = "OWNER" ] ||
+             [ "$ASSOCIATION" = "MEMBER" ] ||
+             grep -qxiF "$LOGIN" .github/TEAM_MEMBERS; then
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+            echo "Skipping issue automation for exempt author: $LOGIN ($ASSOCIATION)"
+          else
+            echo "skip=false" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: Setup Bun
+        if: steps.author.outputs.skip != 'true'
         uses: ./.github/actions/setup-bun
 
       - name: Install opencode
+        if: steps.author.outputs.skip != 'true'
         run: curl -fsSL https://opencode.ai/install | bash
 
       - name: Triage issue
+        if: steps.author.outputs.skip != 'true'
         env:
           OPENCODE_API_KEY: ${{ secrets.OPENCODE_API_KEY }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -30,7 +49,7 @@ jobs:
           ISSUE_TITLE: ${{ github.event.issue.title }}
           ISSUE_BODY: ${{ github.event.issue.body }}
         run: |
-          opencode run --agent triage "The following issue was just opened, triage it:
+          opencode run --agent triage --variant high "The following issue was just opened, triage it:
 
           Title: $ISSUE_TITLE
 

.github/workflows/unlock.yml

@@ -0,0 +1,52 @@
+name: unlock
+
+on:
+  workflow_dispatch:
+    inputs:
+      stage:
+        description: SST stage to unlock
+        required: true
+        type: choice
+        options:
+          - dev
+          - production
+
+concurrency: deploy-${{ inputs.stage }}
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  unlock:
+    runs-on: ubuntu-latest
+    environment: ${{ inputs.stage }}
+    steps:
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+
+      - uses: ./.github/actions/setup-bun
+
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version: "24"
+
+      - uses: aws-actions/configure-aws-credentials@7474bc4690e29a8392af63c5b98e7449536d5c3a # v4.3.1
+        with:
+          role-to-assume: ${{ vars.AWS_DEPLOY_ROLE_ARN }}
+          role-session-name: opencode-${{ github.run_id }}
+          aws-region: us-east-1
+
+      - run: bun sst unlock --stage=${{ inputs.stage }}
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          PLANETSCALE_SERVICE_TOKEN_NAME: ${{ secrets.PLANETSCALE_SERVICE_TOKEN_NAME }}
+          PLANETSCALE_SERVICE_TOKEN: ${{ secrets.PLANETSCALE_SERVICE_TOKEN }}
+          STRIPE_SECRET_KEY: ${{ inputs.stage == 'production' && secrets.STRIPE_SECRET_KEY_PROD || secrets.STRIPE_SECRET_KEY_DEV }}
+          HONEYCOMB_API_KEY: ${{ secrets.HONEYCOMB_API_KEY }}
+          SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
+          SENTRY_ORG: ${{ vars.SENTRY_ORG }}
+          SENTRY_PROJECT: ${{ vars.WEB_SENTRY_PROJECT }}
+          SENTRY_RELEASE: unlock@${{ github.sha }}
+          VITE_SENTRY_DSN: ${{ vars.WEB_SENTRY_DSN }}
+          VITE_SENTRY_RELEASE: unlock@${{ github.sha }}

.gitignore

@@ -32,3 +32,4 @@ UPCOMING_CHANGELOG.md
 logs/
 *.bun-build
 tsconfig.tsbuildinfo
+backups/

.opencode/agent/triage.md

@@ -1,7 +1,7 @@
 ---
 mode: primary
 hidden: true
-model: opencode/gpt-5.4-mini
+model: opencode/gpt-6-luna
 color: "#44BA81"
 tools:
   "*": false

.opencode/command/changelog.md

@@ -1,5 +1,5 @@
 ---
-model: opencode/gpt-5.4
+model: opencode/gpt-6-luna
 ---
 
 Create `UPCOMING_CHANGELOG.md` from the structured changelog input below.

.opencode/command/translate.md

@@ -1,6 +1,6 @@
 ---
 description: translate English to other languages
-model: opencode/claude-opus-4-8
+model: opencode/gpt-6-sol
 ---
 
 run git diff and translate changed english doc and UI copy files to other international languages. Translate all languages in parallel to save time.

.opencode/skills/rtl-aware-development/SKILL.md

@@ -0,0 +1,63 @@
+---
+name: rtl-aware-development
+description: OpenCode Desktop should be RTL-aware. Use when implementing or reviewing RTL/LTR behavior in the web app, desktop app, CSS, menus, scrolling, resizing, icons, mixed-direction text, or Electron title bars.
+---
+
+# RTL-Aware Development
+
+Treat direction as independent from language. Test English in both directions as well as real RTL and mixed-script content.
+
+## Guidelines
+
+- Set `lang` and `dir` on the document, and propagate direction through component providers used by portaled menus and popovers. Do not change the selected locale merely to force RTL.
+- Keep DOM and focus order semantic. Flexbox and Grid already follow `dir`; do not add `row-reverse`, CSS `order`, or reversed markup just to mirror a layout.
+- Prefer logical CSS for semantic layout. Reserve physical coordinates for pointer positions, canvas geometry, native window controls, and other genuinely physical placement.
+
+```css
+/* Avoid */
+padding-left: 12px;
+right: 0;
+border-right: 1px solid;
+text-align: left;
+
+/* Prefer */
+padding-inline-start: 12px;
+inset-inline-end: 0;
+border-inline-end: 1px solid;
+text-align: start;
+```
+
+- Isolate mixed-direction text. Use `dir="auto"` or `<bdi>` for unknown text; keep code, URLs, IDs, and filesystem paths LTR without forcing the surrounding component LTR.
+
+```html
+<span class="file-row"><bdi dir="auto">README.md</bdi></span> <bdi dir="ltr"><code>C:\src\app.ts</code></bdi>
+```
+
+- Mirror directional meaning, not every image. Back/forward, previous/next, disclosure, indentation, and directional progress may need mirroring. Do not mirror brands, clocks, media controls, charts, or text. Reverse physical gradients, `translateX`, SVG transforms, and animation deltas explicitly.
+- Map interactions through direction. `clientX` remains physical; resizing a logical edge needs an RTL-aware delta. Logical previous/next keyboard controls may swap ArrowLeft/ArrowRight. Follow the relevant WAI-ARIA widget pattern.
+- Do not assume LTR scrolling. RTL `scrollLeft` can start at `0` and become negative. Prefer `scrollIntoView({ inline: "nearest" })` or a tested direction-normalizing helper.
+- For Electron title bars, prefer native caption controls and use `titleBarOverlay` plus `env(titlebar-area-*)` for the safe content rectangle. Keep Windows/macOS native-control avoidance and `trafficLightPosition` physical; keep app navigation inside that rectangle logical. Mark interactive titlebar children `app-region: no-drag`.
+- Verify behavior, not screenshots alone. Check computed styles, pseudo-element geometry, hit zones, focus order, keyboard behavior, submenu direction, zoom/scaling, and both LTR and RTL scroll endpoints.
+
+## Test Matrix
+
+- English + LTR
+- English + forced RTL
+- A real RTL locale + RTL
+- Mixed RTL/LTR content, long labels, numbers, code, and paths
+- Keyboard, pointer resize, scrolling, menus/submenus, and Electron titlebar controls in both directions
+
+## References
+
+- [RTL Styling 101, Ahmad Shadeed](https://rtlstyling.com/posts/rtl-styling/)
+- [CSS-Tricks: RTL Styling 101](https://css-tricks.com/rtl-styling-101/)
+- [CSS-Tricks: CSS Logical Properties and Values](https://css-tricks.com/css-logical-properties-and-values/)
+- [W3C: Structural markup and right-to-left text](https://www.w3.org/International/questions/qa-html-dir)
+- [W3C: Inline bidirectional markup](https://www.w3.org/International/articles/inline-bidi-markup/)
+- [MDN: CSS logical properties and values](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Logical_properties_and_values)
+- [MDN: `dir`](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes/dir)
+- [MDN: `scrollLeft`](https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollLeft)
+- [web.dev: Logical properties](https://web.dev/learn/css/logical-properties/)
+- [Electron: Custom title bar](https://www.electronjs.org/docs/latest/tutorial/custom-title-bar)
+- [WAI-ARIA: Window splitter pattern](https://www.w3.org/WAI/ARIA/apg/patterns/windowsplitter/)
+- [Kobalte: I18n Provider](https://kobalte.dev/docs/core/components/i18n-provider/)

.opencode/tool/github-triage.ts

@@ -4,7 +4,7 @@ import { tool } from "@opencode-ai/plugin"
 const TEAM = {
   tui: ["kommander", "simonklee"],
   desktop_web: ["Hona", "Brendonovich"],
-  core: ["jlongster", "rekram1-node", "nexxeln", "kitlangton", "starptech"],
+  core: ["jlongster", "rekram1-node", "neriousy", "nexxeln", "kitlangton"],
   inference: ["fwang", "MrMushrooooom", "starptech"],
   windows: ["Hona"],
 } as const

CHANGELOGS/2026-07-26-desktop-voice-control.md

@@ -0,0 +1,64 @@
+# Change Log — 2026-07-26
+
+## Desktop microphone voice control
+
+### Summary
+
+Added built-in push-to-talk / toggle microphone voice control to the OpenCode Electron desktop app for Windows (and other desktop platforms). Speech is transcribed with cloud STT providers (Deepgram streaming, Groq Whisper, OpenAI Whisper). Short spoken phrases can be interpreted as voice commands.
+
+### Architecture
+
+- **Main process** (`packages/desktop/src/main/voice/`): recording orchestration, SoX/FFmpeg capture when available, cloud STT providers, global hotkey (`Alt+Space` by default), IPC + electron-store config.
+- **Renderer fallback capture**: when SoX/FFmpeg is not installed, the renderer uses `getUserMedia`, downsamples to 16 kHz mono PCM, and streams chunks to the main process.
+- **App UI** (`packages/app/src/voice/`): SolidJS voice context, mic button beside prompt submit, recording overlay, settings tab, command parser.
+- **Config schema** (`packages/opencode/src/config/voice.ts`): Effect Schema for voice settings.
+
+### User setup
+
+1. Set one of: `DEEPGRAM_API_KEY`, `GROQ_API_KEY`, or `OPENAI_API_KEY` in the environment.
+2. Optional: install SoX (`winget install sox`) for native capture; otherwise renderer MediaDevices is used automatically.
+3. In Desktop Settings → Voice, choose provider/hotkey and enable commands.
+4. Press the mic button or the global hotkey to dictate. Say `send`, `clear`, `stop`, etc. for commands.
+
+### Files added
+
+- `packages/desktop/src/main/voice/*`
+- `packages/desktop/docs/voice-control.md`
+- `packages/app/src/voice/*`
+- `packages/opencode/src/config/voice.ts`
+- `CHANGELOGS/2026-07-26-desktop-voice-control.md`
+- `backups/20260726-121936/*` (pre-change backups)
+
+### Files modified
+
+- Desktop main/preload/renderer IPC surface
+- Prompt input V2 (mic button + voice action wiring)
+- Settings dialog (Voice tab)
+- UI icon sets (microphone)
+- App i18n dictionaries
+- Permission dock (`data-action` hooks for voice accept/reject)
+
+### Notes
+
+- Existing npm plugin `opencode-voice` remains useful for CLI/TUI; this feature targets the Electron desktop app where plugins cannot access mic/DOM.
+- Electron `globalShortcut` only fires on keydown, so the hotkey toggles recording (press to start, press again to stop).
+
+## Production installation — 2026-07-30
+
+- Repaired the Windows checkout declaration shim used by app typechecking.
+- Corrected voice recorder child-process typing, settings component contracts, public voice type naming, and resolved config typing.
+- Verified `packages/desktop`, `packages/app`, `packages/opencode`, `packages/ui`, and `packages/session-ui` with their package typecheck commands.
+- Verified the voice command parser with four passing unit tests.
+- Built with `OPENCODE_CHANNEL=prod` and packaged `dist/opencode-desktop-win-x64.exe`.
+- Installer SHA-256: `E4E4C855FB17A9027B993EFB1C59DB8DBC589A23EA9FB171F7401D359913D4EC`.
+- Installed silently for the current user over OpenCode Desktop 1.18.4; the installer returned exit code 0.
+- Confirmed the existing user-data backup at `C:\Users\axcho\OneDrive\Documents\Business\CloudAxc.io\Code\OpenCode\opencode-userdata-backup-20260727`.
+
+## CloudAxe repository publication — 2026-07-30
+
+- Added `backups/` to root `.gitignore` so local timestamped safety copies stay untracked.
+- Re-verified package typechecks for `desktop`, `app`, `opencode`, `ui`, and `session-ui`, plus voice command parser unit tests.
+- Committed voice control source changes on `dev` as `feat(desktop): add voice control` (`78bf9a35eb50e183128a003ce8ef3a5c8b6bb359`).
+- Added remote `cloudaxe` → `https://repo.cloudaxe.io/CloudAxe/cloudaxe-opencode.git`; left GitHub `origin` unchanged.
+- Direct full-history HTTP push hit server `413 Request Entity Too Large`; seeded history via Gitea migrate from `anomalyco/opencode`, then force-with-lease updated `cloudaxe/dev` to the local voice tip.
+- Verified `cloudaxe/dev` SHA matches local `dev` (`78bf9a35eb50e183128a003ce8ef3a5c8b6bb359`).

CHANGELOGS/2026-08-25-add-server-form.md

@@ -0,0 +1,26 @@
+# 2026-08-25 — Fix Add Server form field entry and save
+
+## Summary
+
+Fixed the Settings Add/Edit Server form so name, username, and password can be typed and persisted on save.
+
+## Changes
+
+### `packages/app/src/components/settings-v2/dialog-server-v2.tsx`
+
+- Initialize add/edit form state during setup (before first paint) so uncontrolled defaults apply correctly.
+- Keep URL controlled for validation/preview; make name, username, and password write-once initial values (plain strings, not reactive) so typed characters are not rolled back on Windows/Electron.
+- Stop disabling text fields while the health check runs; only the submit button stays disabled.
+- Allow Cancel during a pending check.
+
+### `packages/app/src/components/dialog-select-server.tsx`
+
+- Persist username independently of password on add (aligned with edit), so credentials are not dropped when only one is set.
+- Remove `isPending` early-returns from field change handlers so input continues updating the store during health checks.
+- Keep optional legacy `ServerForm` fields enabled while checking; only the submit button is disabled.
+
+## Verification
+
+- `bun typecheck` in `packages/app`
+- Rebuilt `packages/desktop` (`OPENCODE_CHANNEL=prod bun run build` + `npx electron-builder --win --publish never`).
+- Reinstalled the Windows app from `packages/desktop/dist/opencode-desktop-win-x64.exe`; verified installed `app.asar` timestamp updated and app relaunched.

CHANGELOGS/2026-08-25-upstream-desktop-sync.md

@@ -0,0 +1,66 @@
+# 2026-08-25 — Upstream OpenCode desktop sync
+
+## Summary
+
+Merged latest upstream `origin/dev` (`anomalyco/opencode`) into the CloudAxe fork `dev` branch while preserving CloudAxe voice-control commits.
+
+## Upstream
+
+- Remote: `origin` → `https://github.com/anomalyco/opencode.git`
+- Target: `origin/dev` @ `8615731d46` (`fix(console): rate limit checkout session creation (#45007)`)
+- Fork point / merge-base: `0317531906` (`zen: add laguna-2-2.1`)
+- Approx. upstream commits integrated: ~467
+
+## Preserved CloudAxe commits
+
+- `78bf9a35eb` — `feat(desktop): add voice control`
+- `9f5a50a369` — `docs(desktop): note CloudAxe voice fork publication`
+
+## Conflict resolution strategy
+
+Keep CloudAxe voice-control additions; accept upstream changes for everything else. Never drop upstream keys/symbols.
+
+### Resolved conflict files
+
+| File | Resolution |
+|------|------------|
+| `packages/app/src/app.tsx` | Kept `VoiceProvider` + `VoiceOverlay`; matched upstream provider tree (no `MarkedProvider`) |
+| `packages/app/src/components/prompt-input-v2.tsx` | Kept voice action registration + `VoiceButton`; dropped obsolete `useCommands` / `useEditHandler`; kept upstream imports (`onCleanup` retained for voice cleanup) |
+| `packages/app/src/components/settings-v2/dialog-settings-v2.tsx` | Combined imports: `createMemo` (upstream) + `Show` (voice settings gate) |
+| `packages/desktop/src/preload/index.ts` | Kept both `setNativeTranslations` (upstream) and `voice` IPC API (CloudAxe) |
+| `packages/desktop/src/preload/types.ts` | Kept both `setNativeTranslations` and `voice: VoiceAPI` |
+| `packages/session-ui/src/v2/components/prompt-input/index.tsx` | Kept both `actions` (voice button slot) and `variantControlVisible`; used upstream i18n send/stop labels |
+| `packages/app/src/i18n/da.ts` | Upstream locale + CloudAxe voice keys |
+| `packages/app/src/i18n/de.ts` | Upstream locale (`satisfies Partial<Record<Keys, string>>`) + CloudAxe voice keys |
+| `packages/app/src/i18n/fr.ts` | Upstream locale + CloudAxe voice keys |
+| `packages/app/src/i18n/ja.ts` | Upstream locale + CloudAxe voice keys |
+| `packages/app/src/i18n/ko.ts` | Upstream locale + CloudAxe voice keys |
+
+Auto-merged locales that already retained voice keys: `ar`, `br`, `bs`, `en`, `es`, `no`, `pl`, `ru`, `th`, `tr`, `uk`, `zh`, `zht`.
+
+## Follow-up fixes for pre-push typecheck
+
+- Updated `packages/app/src/voice/voice-settings.tsx` to import `ExternalLink` from `@/components/external-link` (upstream renamed `link.tsx`).
+- Ran `bun install` after the merge so vendored `@opencode-ai/client` (with `./promise` export) is linked.
+- Repaired incomplete local installs that blocked monorepo typecheck on Windows/OneDrive (`drizzle-orm`, `marked-shiki` peer `marked@18`, enterprise `custom-elements.d.ts` symlink).
+- Aligned `bun.lock` desktop `drizzle-orm` entry to `catalog:`.
+
+## Verification
+
+- `bun typecheck` (root turbo, 30 packages) — passed
+- `bun typecheck` in `packages/opencode` — passed
+- `bun typecheck` in `packages/desktop` — passed
+- Pushed to `cloudaxe/dev` (`9f5a50a369..995b823ee4`)
+- No remaining `<<<<<<<` / `>>>>>>>` conflict markers
+- Voice module paths still present: `packages/app/src/voice/`, `packages/desktop/src/main/voice/`
+
+## Resulting commits on `dev`
+
+- `fc2c29bd3a` — `chore: merge upstream opencode desktop changes`
+- `851e958191` — `fix(desktop): adapt voice settings to upstream ExternalLink`
+- `995b823ee4` — `chore: use catalog drizzle-orm in lockfile`
+
+## Integration method
+
+- Merge commit (no rebase, no force-push)
+- Safety branch before merge: `backup-pre-upstream-sync`

CHANGELOGS/2026-09-29-upstream-desktop-sync.md

@@ -0,0 +1,52 @@
+# 2026-09-29 — Upstream OpenCode desktop sync
+
+## Summary
+
+Merged latest upstream `origin/dev` (`anomalyco/opencode`) into the CloudAxe fork `dev` branch. The merge was clean. Voice-control modules and their integration hooks stayed in place.
+
+## Upstream
+
+- Remote: `origin` → `https://github.com/anomalyco/opencode.git`
+- Target: `origin/dev` @ `7945de208964` (`Merge branch 'dev' of github.com:anomalyco/opencode into dev`, 2026-09-28)
+- Previous sync point: `8615731d4615` (2026-08-25)
+- Desktop package version: `1.18.23` → `1.18.33`
+- Approx. upstream commits integrated: 263
+- Electron stayed at `42.3.3`
+
+## Resulting commit
+
+- `d2d1e2b685` — `chore: merge upstream opencode desktop changes`
+- Safety branch before merge: `backup-pre-upstream-sync-20260929`
+- Integration method: merge commit (`--no-ff`), no rebase, no force-push
+- No conflict markers
+
+## Voice control
+
+Voice remains fork-only. Upstream still has no equivalent. Preserved paths:
+
+- `packages/app/src/voice/`
+- `packages/desktop/src/main/voice/`
+- `packages/opencode/src/config/voice.ts`
+- App shell `VoiceProvider`, prompt microphone button (`data-action="prompt-voice"`), Voice settings copy, preload `voice:*` IPC
+
+## Verification
+
+- `bun install` from the repo root
+- Repaired a truncated `ai-gateway-provider@3.2.0` extract that left `package.json` missing, then installed again
+- `bun typecheck` in `packages/desktop` — passed
+- `bun typecheck` in `packages/app` — passed
+- `bun typecheck` in `packages/opencode` — passed after the package repair
+- Voice command parser: 4 passing tests (`send`, `clear`, longer phrases, commands disabled)
+- Production renderer and main bundles contain the Voice settings title, the prompt microphone action, and the voice IPC handlers including toggle and default hotkey `Alt+Space`
+
+## Windows package
+
+- Built with `OPENCODE_CHANNEL=prod`
+- In-repo `electron-builder` output failed with `EPERM` renaming `dist/win-unpacked.tmp` on OneDrive
+- Installer written outside the repo: `C:\Users\axcho\AppData\Local\Temp\opencode-desktop-1.18.33\opencode-desktop-win-x64.exe`
+- Copy in the checkout: `packages/desktop/dist/opencode-desktop-win-x64.exe`
+- Size: 130,688,374 bytes
+- SHA-256: `F78664903A7346F140153F8F34668946A28156DBEF581AFEFCBBE96EFD9E580D`
+- Installed silently for the current user with the one-click installer (`/S`)
+- Installed app: `%LOCALAPPDATA%\Programs\@opencode-aidesktop\OpenCode.exe`, file version `1.18.33`
+- Live microphone capture, global hotkey, and cloud transcription were not exercised; those need the desktop session, a microphone, and a speech-provider API key

CHANGELOGS/2026-10-03-cact-deploy-playbook.md

@@ -0,0 +1,24 @@
+# 2026-10-03 — CACT server deploy playbook
+
+## Summary
+
+Added an operator playbook for deploying the CloudAxe Coder Team (CACT) on a new Linux server: headless OpenCode on port 4096, the `cact-*` agent pack, provider auth, systemd, firewall/TLS notes, health checks, desktop connection, and upgrade/rollback.
+
+## Changes
+
+### Added
+
+- [`docs/cact-server-playbook.md`](../docs/cact-server-playbook.md) — repeatable runbook with placeholders only (no live secrets). Covers:
+  - Target shape (`opencode serve`, basic auth, XDG paths)
+  - Host bootstrap (packages, service user, fork install)
+  - CACT agent inventory and provider mapping
+  - OpenRouter callout for `cact-documentation-agent`
+  - Secrets (`server.env`, `auth.json`)
+  - systemd unit and rollback
+  - Network hardening and optional Nginx TLS
+  - Verification via `/global/health`, `/api/location`, and CloudAxe Desktop
+  - Upgrade snapshot procedure and ops checklist
+
+## Scope
+
+Documentation only. No runtime, agent-definition, or config code changes in this change set.

CONTRIBUTING.md

@@ -157,7 +157,7 @@ Caveats:
 - If `spawn` does not work for you, you can debug the server separately:
   - Debug server: `bun run --inspect=ws://localhost:6499/ --cwd packages/opencode ./src/index.ts serve --port 4096`,
     then attach TUI with `opencode attach http://localhost:4096`
-  - Debug TUI: `bun run --inspect=ws://localhost:6499/ --cwd packages/opencode --conditions=browser ./src/index.ts`
+  - Debug TUI: `bun run --inspect=ws://localhost:6499/ --cwd packages/opencode ./src/index.ts`
 
 Other tips and tricks:
 
@@ -252,33 +252,6 @@ These are not strictly enforced, they are just general guidelines:
 
 For net-new functionality, start with a design conversation. Open an issue describing the problem, your proposed approach (optional), and why it belongs in OpenCode. The core team will help decide whether it should move forward; please wait for that approval instead of opening a feature PR directly.
 
-## Trust & Vouch System
-
-This project uses [vouch](https://github.com/mitchellh/vouch) to manage contributor trust. The vouch list is maintained in [`.github/VOUCHED.td`](.github/VOUCHED.td).
-
-### How it works
-
-- **Vouched users** are explicitly trusted contributors.
-- **Denounced users** are explicitly blocked. Issues and pull requests from denounced users are automatically closed. If you have been denounced, you can request to be unvouched by reaching out to a maintainer on [Discord](https://opencode.ai/discord)
-- **Everyone else** can participate normally — you don't need to be vouched to open issues or PRs.
-
-### For maintainers
-
-Collaborators with write access can manage the vouch list by commenting on any issue:
-
-- `vouch` — vouch for the issue author
-- `vouch @username` — vouch for a specific user
-- `denounce` — denounce the issue author
-- `denounce @username` — denounce a specific user
-- `denounce @username <reason>` — denounce with a reason
-- `unvouch` / `unvouch @username` — remove someone from the list
-
-Changes are committed automatically to `.github/VOUCHED.td`.
-
-### Denouncement policy
-
-Denouncement is reserved for users who repeatedly submit low-quality AI-generated contributions, spam, or otherwise act in bad faith. It is not used for disagreements or honest mistakes.
-
 ## Issue Requirements
 
 All issues **must** use one of our issue templates:

README.zh.md

@@ -125,4 +125,4 @@ OpenCode 内置两种 Agent，可用 `Tab` 键快速切换：
 
 ---
 
-**加入我们的社区** [飞书](https://applink.feishu.cn/client/chat/chatter/add_by_link?link_token=738j8655-cd59-4633-a30a-1124e0096789&qr_code=true) | [X.com](https://x.com/opencode)
+**加入我们的社区** [飞书](https://applink.feishu.cn/client/chat/chatter/add_by_link?link_token=52ao9352-5623-4fa0-b7dd-3407c392c1af&qr_code=true) | [X.com](https://x.com/opencode)

README.zht.md

@@ -125,4 +125,4 @@ OpenCode 內建了兩種 Agent，您可以使用 `Tab` 鍵快速切換。
 
 ---
 
-**加入我們的社群** [飞书](https://applink.feishu.cn/client/chat/chatter/add_by_link?link_token=738j8655-cd59-4633-a30a-1124e0096789&qr_code=true) | [X.com](https://x.com/opencode)
+**加入我們的社群** [飞书](https://applink.feishu.cn/client/chat/chatter/add_by_link?link_token=52ao9352-5623-4fa0-b7dd-3407c392c1af&qr_code=true) | [X.com](https://x.com/opencode)

artifacts/glm52-rise-video/.gitignore

@@ -0,0 +1,3 @@
+node_modules
+.remotion
+out/frame-*.png

artifacts/glm52-rise-video/bun.lock

@@ -0,0 +1,483 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "glm52-rise-video",
+      "dependencies": {
+        "@remotion/cli": "^4.0.384",
+        "react": "^19.2.3",
+        "react-dom": "^19.2.3",
+        "remotion": "^4.0.384",
+      },
+      "devDependencies": {
+        "@types/react": "^19.2.8",
+        "@types/react-dom": "^19.2.3",
+        "typescript": "^5.8.2",
+      },
+    },
+  },
+  "packages": {
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+
+    "@babel/helper-validator-identifier": ["@babel/helper-validator-identifier@7.29.7", "", {}, "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg=="],
+
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+
+    "@babel/types": ["@babel/types@7.24.0", "", { "dependencies": { "@babel/helper-string-parser": "^7.23.4", "@babel/helper-validator-identifier": "^7.22.20", "to-fast-properties": "^2.0.0" } }, "sha512-+j7a5c253RfKh8iABBhywc8NSfP5LURe7Uh4qpsh6jc+aLJguvmIUBdjSdEMQv2bENrCR5MfRdjGo7vzS/ob7w=="],
+
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+
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+
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+
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+
+    "@esbuild/android-arm": ["@esbuild/android-arm@0.28.1", "", { "os": "android", "cpu": "arm" }, "sha512-0k2F129Xdio1TdJfzJ8sy1Q47vUD2NnwdhiAf7drUN1EBTfPf4hsFCtmMgu/6m8JSzsBrlmVjudMBQqOfG8usQ=="],
+
+    "@esbuild/android-arm64": ["@esbuild/android-arm64@0.28.1", "", { "os": "android", "cpu": "arm64" }, "sha512-34EGEbCIAgosYz6goLcopX6Mo7NyGv9tfwEM2/7Ce2VcVRk568iSvniGWcUXIy7wEDR1wzolcxcriFVrWYcwBg=="],
+
+    "@esbuild/android-x64": ["@esbuild/android-x64@0.28.1", "", { "os": "android", "cpu": "x64" }, "sha512-dbwY7ltSMDWsRatcRpCnES4F+im88OCUgGZjy52shC7GqHRE/cYlxNbB4Z4UpJswpcc4Qxd2oE/ufM0p61IKng=="],
+
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+
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+
+    "@esbuild/freebsd-x64": ["@esbuild/freebsd-x64@0.28.1", "", { "os": "freebsd", "cpu": "x64" }, "sha512-i7dZ9vQgnvSCzi/rYCXNgtF/U+eKZNJBzu3eTQbRgHnM7tNSizLOkRFAl3qzVc/Op/u5YkHHa4pf/3DOYHthLQ=="],
+
+    "@esbuild/linux-arm": ["@esbuild/linux-arm@0.28.1", "", { "os": "linux", "cpu": "arm" }, "sha512-qVXBOHQS+d5Y722GwJzJUtOLlX7km3CraOaGormF1pDtPd2C/l1SHRPgjLunLGe51Sh5YYWKMFDyV4SxgMQYTQ=="],
+
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+
+    "style-loader": ["style-loader@4.0.0", "", { "peerDependencies": { "webpack": "^5.27.0" } }, "sha512-1V4WqhhZZgjVAVJyt7TdDPZoPBPNHbekX4fWnCJL1yQukhCeZhJySUL+gL9y6sNdN95uEOS83Y55SqHcP7MzLA=="],
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+    "tapable": ["tapable@2.3.3", "", {}, "sha512-uxc/zpqFg6x7C8vOE7lh6Lbda8eEL9zmVm/PLeTPBRhh1xCgdWaQ+J1CUieGpIfm2HdtsUpRv+HshiasBMcc6A=="],
+
+    "terser": ["terser@5.48.0", "", { "dependencies": { "@jridgewell/source-map": "^0.3.3", "acorn": "^8.15.0", "commander": "^2.20.0", "source-map-support": "~0.5.20" }, "bin": { "terser": "bin/terser" } }, "sha512-J/9An6vs9Us6wKRriSFXBWdRZapREHqFzdNUKk0pmu804EMR6dr6winwo7e5JDxN4xahxQsuysyYFwlwj4XN/Q=="],
+
+    "terser-webpack-plugin": ["terser-webpack-plugin@5.6.1", "", { "dependencies": { "@jridgewell/trace-mapping": "^0.3.25", "jest-worker": "^27.4.5", "schema-utils": "^4.3.0", "terser": "^5.31.1" }, "peerDependencies": { "webpack": "^5.1.0" } }, "sha512-201R5j+sJpK8nFWwKVyNfZot8FaJbLZDq5evriVzbV1wDtSXDjRUDRfJzHpAaxFDMEhsZL1QkeqM61wgsS3KaQ=="],
+
+    "tiny-invariant": ["tiny-invariant@1.3.3", "", {}, "sha512-+FbBPE1o9QAYvviau/qC5SE3caw21q3xkvWKBtja5vgqOWIHHJ3ioaq1VPfn/Szqctz2bU/oYeKd9/z5BL+PVg=="],
+
+    "to-fast-properties": ["to-fast-properties@2.0.0", "", {}, "sha512-/OaKK0xYrs3DmxRYqL/yDc+FxFUVYhDlXMhRmv3z915w2HF1tnN1omB354j8VUGO/hbRzyD6Y3sA7v7GS/ceog=="],
+
+    "tr46": ["tr46@1.0.1", "", { "dependencies": { "punycode": "^2.1.0" } }, "sha512-dTpowEjclQ7Kgx5SdBkqRzVhERQXov8/l9Ft9dVM9fmg0W0KQSVaXX9T4i6twCPNtYiZM53lpSSUAwJbFPOHxA=="],
+
+    "tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
+
+    "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
+
+    "undici-types": ["undici-types@8.3.0", "", {}, "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ=="],
+
+    "update-browserslist-db": ["update-browserslist-db@1.2.3", "", { "dependencies": { "escalade": "^3.2.0", "picocolors": "^1.1.1" }, "peerDependencies": { "browserslist": ">= 4.21.0" }, "bin": { "update-browserslist-db": "cli.js" } }, "sha512-Js0m9cx+qOgDxo0eMiFGEueWztz+d4+M3rGlmKPT+T4IS/jP4ylw3Nwpu6cpTTP8R1MAC1kF4VbdLt3ARf209w=="],
+
+    "util-deprecate": ["util-deprecate@1.0.2", "", {}, "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="],
+
+    "watchpack": ["watchpack@2.5.2", "", { "dependencies": { "graceful-fs": "^4.1.2" } }, "sha512-6i/00NBjP4yGPs+caKSyRfpTF/8Torsu0MOW3mMzIbhgISFder8i7xbqgHlLMwJrdiN8ndBV3UA1/AfzPSr+jg=="],
+
+    "webidl-conversions": ["webidl-conversions@4.0.2", "", {}, "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg=="],
+
+    "webpack": ["webpack@5.105.0", "", { "dependencies": { "@types/eslint-scope": "^3.7.7", "@types/estree": "^1.0.8", "@types/json-schema": "^7.0.15", "@webassemblyjs/ast": "^1.14.1", "@webassemblyjs/wasm-edit": "^1.14.1", "@webassemblyjs/wasm-parser": "^1.14.1", "acorn": "^8.15.0", "acorn-import-phases": "^1.0.3", "browserslist": "^4.28.1", "chrome-trace-event": "^1.0.2", "enhanced-resolve": "^5.19.0", "es-module-lexer": "^2.0.0", "eslint-scope": "5.1.1", "events": "^3.2.0", "glob-to-regexp": "^0.4.1", "graceful-fs": "^4.2.11", "json-parse-even-better-errors": "^2.3.1", "loader-runner": "^4.3.1", "mime-types": "^2.1.27", "neo-async": "^2.6.2", "schema-utils": "^4.3.3", "tapable": "^2.3.0", "terser-webpack-plugin": "^5.3.16", "watchpack": "^2.5.1", "webpack-sources": "^3.3.3" }, "bin": { "webpack": "bin/webpack.js" } }, "sha512-gX/dMkRQc7QOMzgTe6KsYFM7DxeIONQSui1s0n/0xht36HvrgbxtM1xBlgx596NbpHuQU8P7QpKwrZYwUX48nw=="],
+
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+
+    "whatwg-url": ["whatwg-url@7.1.0", "", { "dependencies": { "lodash.sortby": "^4.7.0", "tr46": "^1.0.1", "webidl-conversions": "^4.0.2" } }, "sha512-WUu7Rg1DroM7oQvGWfOiAK21n74Gg+T4elXEQYkOhtyLeWiJFoOGLXPKI/9gzIie9CtwVLm8wtw6YJdKyxSjeg=="],
+
+    "which": ["which@2.0.2", "", { "dependencies": { "isexe": "^2.0.0" }, "bin": { "node-which": "./bin/node-which" } }, "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA=="],
+
+    "ws": ["ws@8.21.0", "", { "peerDependencies": { "bufferutil": "^4.0.1", "utf-8-validate": ">=5.0.2" }, "optionalPeers": ["bufferutil", "utf-8-validate"] }, "sha512-Vsp28b7DRcimFQvrqu2Wek3z1iYxDCWqHYB8Qsnk/S4RfaCQzPGPyBNuVjJV3cd6UiKtUtp6sNM77gWvzcCH+g=="],
+
+    "yallist": ["yallist@4.0.0", "", {}, "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="],
+
+    "zod": ["zod@4.3.6", "", {}, "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg=="],
+
+    "css-loader/semver": ["semver@7.8.5", "", { "bin": { "semver": "bin/semver.js" } }, "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA=="],
+
+    "esrecurse/estraverse": ["estraverse@5.3.0", "", {}, "sha512-MMdARuVEQziNTeJD8DgMqmhwR11BRQ/cBP+pLtYdSTnf3MIO8fFeiINEbX36ZdNlfU/7A9f3gUw49B3oQsvwBA=="],
+
+    "recast/source-map": ["source-map@0.6.1", "", {}, "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="],
+
+    "source-map-support/source-map": ["source-map@0.6.1", "", {}, "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="],
+  }
+}

artifacts/glm52-rise-video/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "glm52-rise-video",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "render": "remotion render src/index.tsx GLM52Rise out/glm-52-broke-out.mp4 --codec h264 --pixel-format yuv420p",
+    "render:sheep": "remotion render src/index.tsx NZSheep out/nz-sheep.mp4 --codec h264 --pixel-format yuv420p",
+    "render:novel": "remotion render src/index.tsx NovelTokens out/novel-1984.mp4 --codec h264 --pixel-format yuv420p",
+    "render:flash": "remotion render src/index.tsx FlashShare out/flash-share.mp4 --codec h264 --pixel-format yuv420p",
+    "render:minimax": "remotion render src/index.tsx MiniMaxClimb out/minimax-climb.mp4 --codec h264 --pixel-format yuv420p",
+    "still:june": "remotion still src/index.tsx JuneTotals out/june-totals.png --frame=0"
+  },
+  "dependencies": {
+    "@remotion/cli": "^4.0.384",
+    "react": "^19.2.3",
+    "react-dom": "^19.2.3",
+    "remotion": "^4.0.384"
+  },
+  "devDependencies": {
+    "@types/react": "^19.2.8",
+    "@types/react-dom": "^19.2.3",
+    "typescript": "^5.8.2"
+  }
+}

artifacts/glm52-rise-video/src/data.ts

@@ -0,0 +1,156 @@
+// Verified against the production opencode-stats PlanetScale DB.
+// Scope: tier='Go' (OpenCode Go), dataset='zen', client='all', source='all', grain='day'.
+// metric = total_tokens. Daily token volume per model; GLM-5.2 (zhipu) launched Jun 17.
+// Segments per day (tokens): glm-5.2, deepseek-v4-flash, deepseek-v4-pro, minimax-m3, all others.
+
+export type Day = {
+  date: string
+  total: number
+  glm: number
+  dsf: number
+  dsp: number
+  mm: number
+  others: number
+}
+
+export const days: Day[] = [
+  {
+    date: "Jun 12",
+    total: 2_283_799_449_383,
+    glm: 0,
+    dsf: 1_176_701_653_509,
+    dsp: 569_527_034_307,
+    mm: 159_016_250_684,
+    others: 378_554_510_883,
+  },
+  {
+    date: "Jun 13",
+    total: 2_008_462_388_420,
+    glm: 0,
+    dsf: 995_338_131_997,
+    dsp: 445_817_536_548,
+    mm: 211_743_241_967,
+    others: 355_563_477_908,
+  },
+  {
+    date: "Jun 14",
+    total: 2_007_785_405_251,
+    glm: 0,
+    dsf: 983_954_176_228,
+    dsp: 428_151_999_341,
+    mm: 262_476_527_930,
+    others: 333_202_701_752,
+  },
+  {
+    date: "Jun 15",
+    total: 2_694_736_103_062,
+    glm: 0,
+    dsf: 1_255_893_953_859,
+    dsp: 632_223_338_376,
+    mm: 352_507_442_991,
+    others: 454_111_367_836,
+  },
+  {
+    date: "Jun 16",
+    total: 2_838_153_758_908,
+    glm: 0,
+    dsf: 1_336_625_283_800,
+    dsp: 676_480_415_730,
+    mm: 305_268_829_013,
+    others: 519_779_230_365,
+  },
+  {
+    date: "Jun 17",
+    total: 2_778_964_711_109,
+    glm: 70_095_977_043,
+    dsf: 1_339_831_523_555,
+    dsp: 660_414_395_220,
+    mm: 251_302_096_157,
+    others: 457_320_719_134,
+  },
+  {
+    date: "Jun 18",
+    total: 2_806_992_430_656,
+    glm: 201_130_231_172,
+    dsf: 1_295_599_996_869,
+    dsp: 595_665_008_776,
+    mm: 322_205_104_324,
+    others: 392_392_089_515,
+  },
+  {
+    date: "Jun 19",
+    total: 2_419_611_630_232,
+    glm: 199_086_413_910,
+    dsf: 1_115_750_468_802,
+    dsp: 475_965_869_304,
+    mm: 303_586_698_735,
+    others: 325_222_179_481,
+  },
+  {
+    date: "Jun 20",
+    total: 2_188_278_916_865,
+    glm: 193_931_516_396,
+    dsf: 1_050_194_681_012,
+    dsp: 395_303_435_278,
+    mm: 281_998_000_337,
+    others: 266_851_283_842,
+  },
+  {
+    date: "Jun 21",
+    total: 2_042_309_961_344,
+    glm: 181_894_043_118,
+    dsf: 985_164_570_580,
+    dsp: 368_194_079_542,
+    mm: 259_812_551_324,
+    others: 247_244_716_780,
+  },
+  {
+    date: "Jun 22",
+    total: 2_893_934_325_663,
+    glm: 301_759_048_475,
+    dsf: 1_298_124_282_989,
+    dsp: 581_012_596_194,
+    mm: 371_581_117_839,
+    others: 341_457_280_166,
+  },
+  {
+    date: "Jun 23",
+    total: 3_109_009_321_480,
+    glm: 282_277_235_158,
+    dsf: 1_423_571_678_821,
+    dsp: 627_374_654_587,
+    mm: 429_416_300_508,
+    others: 346_369_452_406,
+  },
+  {
+    date: "Jun 24",
+    total: 2_939_149_971_595,
+    glm: 256_497_442_533,
+    dsf: 1_373_583_023_234,
+    dsp: 601_270_997_775,
+    mm: 391_586_493_231,
+    others: 316_212_014_822,
+  },
+  {
+    date: "Jun 25",
+    total: 3_029_641_552_948,
+    glm: 256_279_657_734,
+    dsf: 1_481_084_002_776,
+    dsp: 602_077_167_287,
+    mm: 375_985_302_874,
+    others: 314_215_422_277,
+  },
+]
+
+export const launchIndex = 5 // Jun 17, first day of GLM-5.2 usage
+// GLM-5.2 weekly token volume, Jun 19-25 (sum of glm): 1,671,725,357,324 = 1.67T
+export const glmWeekTokensT = 1.672
+
+// stacked segments, bottom -> top. GLM-5.2 is the hero (blue); the rest are the field it cut into.
+export const segments = [
+  { key: "glm", label: "GLM-5.2", color: "#3b5cf6", hero: true },
+  { key: "dsf", label: "deepseek-v4-flash", color: "#9ca3ad" },
+  { key: "dsp", label: "deepseek-v4-pro", color: "#b3b9c1" },
+  { key: "mm", label: "minimax-m3", color: "#c8cdd3" },
+  { key: "others", label: "other models", color: "#dde0e4" },
+] as const

artifacts/glm52-rise-video/src/flash.tsx

@@ -0,0 +1,185 @@
+import React from "react"
+import { AbsoluteFill, Easing, interpolate, spring, useCurrentFrame, useVideoConfig } from "remotion"
+
+// stats.opencode.ai design tokens (light theme)
+const c = {
+  bg: "#ffffff",
+  ink: "#161616",
+  muted: "#5c5c5c",
+  faint: "#808080",
+  line: "#e6e6e6",
+  dot: "#e4e4e4",
+  gray: "#aab0b8",
+  accent: "#3b5cf6",
+  accentHi: "#5b78ff",
+}
+const MONO = '"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace'
+
+const DOT_MASK =
+  "url(\"data:image/svg+xml,%3Csvg viewBox='0 0 6 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0H2V2H0V0Z' fill='black'/%3E%3C/svg%3E\")"
+
+// verified: OpenCode Go, week of Jun 22-28, 2026 (2026-W26). share = % of 19.64T total Go tokens.
+const bars = [
+  { label: "deepseek-v4-flash", share: 48.3, hero: true },
+  { label: "deepseek-v4-pro", share: 19.4 },
+  { label: "minimax-m3", share: 13.0 },
+  { label: "glm-5.2", share: 8.3 },
+  { label: "mimo-v2.5", share: 4.3 },
+  { label: "kimi-k2.7-code", share: 2.6 },
+  { label: "other models", share: 4.1 },
+]
+
+function DataWordmark({ height = 30 }: { height?: number }) {
+  return (
+    <svg width={(height * 66) / 20} height={height} viewBox="0 0 66 20" fill="none" style={{ color: c.ink }}>
+      <path opacity="0.2" d="M12 16H4V8H12V16Z" fill="currentColor" />
+      <path d="M12 4H4V16H12V4ZM16 20H0V0H16V20Z" fill="currentColor" />
+      <path
+        d="M63.3543 16L62.5119 12.8711H58.6437L57.8013 16H55.7383L59.2454 4H61.9618L65.4689 16H63.3543ZM61.0678 7.851L60.6896 5.94269H60.4489L60.0707 7.851L59.1595 11.1347H61.9962L61.0678 7.851Z"
+        fill="currentColor"
+      />
+      <path d="M52.5951 5.87392V16H50.4461V5.87392H47.4375V4H55.6209V5.87392H52.5951Z" fill="currentColor" />
+      <path
+        d="M45.2059 16L44.3635 12.8711H40.4953L39.6529 16H37.5898L41.097 4H43.8133L47.3205 16H45.2059ZM42.9194 7.851L42.5411 5.94269H42.3004L41.9222 7.851L41.011 11.1347H43.8477L42.9194 7.851Z"
+        fill="currentColor"
+      />
+      <path
+        d="M28 4H32.0917C32.8138 4 33.4556 4.11461 34.0172 4.34384C34.5903 4.5616 35.0716 4.9169 35.4613 5.40974C35.8625 5.89112 36.1662 6.51003 36.3725 7.26648C36.5788 8.02292 36.6819 8.9341 36.6819 10C36.6819 11.0659 36.5788 11.9771 36.3725 12.7335C36.1662 13.49 35.8625 14.1146 35.4613 14.6075C35.0716 15.0888 34.5903 15.4441 34.0172 15.6734C33.4556 15.8911 32.8138 16 32.0917 16H28V4ZM32.0917 14.1261C32.8252 14.1261 33.3926 13.9026 33.7937 13.4556C34.1948 12.9971 34.3954 12.3152 34.3954 11.4097V8.59026C34.3954 7.68481 34.1948 7.0086 33.7937 6.5616C33.3926 6.10315 32.8252 5.87392 32.0917 5.87392H30.149V14.1261H32.0917Z"
+        fill="currentColor"
+      />
+    </svg>
+  )
+}
+
+export function FlashShare() {
+  const frame = useCurrentFrame()
+  const { fps } = useVideoConfig()
+
+  const grow = (i: number) =>
+    Math.min(
+      1,
+      Math.max(0, spring({ frame: frame - 18 - i * 7, fps, config: { damping: 18, stiffness: 120, mass: 0.6 } })),
+    )
+
+  return (
+    <AbsoluteFill style={{ background: c.bg, color: c.ink, fontFamily: MONO, padding: 72, boxSizing: "border-box" }}>
+      <div style={{ height: "100%", display: "flex", flexDirection: "column" }}>
+        {/* header */}
+        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center" }}>
+          <DataWordmark height={30} />
+          <div style={{ fontSize: 20, fontWeight: 500, color: c.faint, letterSpacing: 1 }}>JUN 22–28, 2026</div>
+        </div>
+
+        {/* headline (static) */}
+        <div style={{ marginTop: 50 }}>
+          <div style={{ fontSize: 23, fontWeight: 600, color: c.muted, letterSpacing: 2 }}>
+            OPENCODE GO · SHARE OF TOKENS
+          </div>
+          <div
+            style={{ display: "flex", justifyContent: "space-between", alignItems: "baseline", gap: 24, marginTop: 14 }}
+          >
+            <div style={{ fontSize: 62, fontWeight: 600, letterSpacing: -2, lineHeight: 1 }}>DeepSeek V4 Flash</div>
+            <div
+              style={{
+                fontSize: 88,
+                fontWeight: 600,
+                letterSpacing: -2,
+                lineHeight: 1,
+                color: c.accent,
+                fontVariantNumeric: "tabular-nums",
+              }}
+            >
+              48%
+            </div>
+          </div>
+        </div>
+
+        {/* bar chart */}
+        <div style={{ flex: 1, display: "flex", flexDirection: "column", justifyContent: "center", gap: 16 }}>
+          {bars.map((b, i) => {
+            const g = grow(i)
+            const pct = b.share * g
+            return (
+              <div key={b.label} style={{ display: "flex", alignItems: "center", gap: 18 }}>
+                <div
+                  style={{
+                    width: 268,
+                    fontSize: 23,
+                    fontWeight: b.hero ? 600 : 500,
+                    color: b.hero ? c.ink : c.muted,
+                    textAlign: "right",
+                    whiteSpace: "nowrap",
+                  }}
+                >
+                  {b.label}
+                </div>
+                <div style={{ position: "relative", flex: 1, height: 48 }}>
+                  {/* dotted 100% track — height is a multiple of the 12px tile, anchored bottom, so dots never clip */}
+                  <div
+                    style={{
+                      position: "absolute",
+                      inset: 0,
+                      background: c.dot,
+                      WebkitMaskImage: DOT_MASK,
+                      maskImage: DOT_MASK,
+                      WebkitMaskSize: "12px 12px",
+                      maskSize: "12px 12px",
+                      WebkitMaskRepeat: "repeat",
+                      maskRepeat: "repeat",
+                      WebkitMaskPosition: "left bottom",
+                      maskPosition: "left bottom",
+                    }}
+                  />
+                  {/* fill */}
+                  <div
+                    style={{
+                      position: "absolute",
+                      left: 0,
+                      top: 0,
+                      bottom: 0,
+                      width: `${pct}%`,
+                      background: b.hero ? c.accent : c.gray,
+                      borderRight: b.hero ? `2px solid ${c.accentHi}` : "none",
+                    }}
+                  />
+                </div>
+                <div
+                  style={{
+                    width: 84,
+                    fontSize: 24,
+                    fontWeight: b.hero ? 600 : 500,
+                    color: b.hero ? c.accent : c.muted,
+                    textAlign: "right",
+                    fontVariantNumeric: "tabular-nums",
+                  }}
+                >
+                  {Math.round(pct)}%
+                </div>
+              </div>
+            )
+          })}
+        </div>
+
+        {/* footer */}
+        <div
+          style={{
+            display: "flex",
+            justifyContent: "space-between",
+            alignItems: "center",
+            marginTop: 24,
+            paddingTop: 22,
+            borderTop: `1px solid ${c.line}`,
+            fontSize: 20,
+            fontWeight: 500,
+          }}
+        >
+          <div style={{ display: "inline-flex", alignItems: "center", gap: 9, color: c.muted }}>
+            <span style={{ width: 13, height: 13, background: c.accent, display: "inline-block" }} />
+            DeepSeek V4 Flash · 9.48T tokens · 83.6M requests
+          </div>
+          <div style={{ color: c.ink }}>opencode.ai/data</div>
+        </div>
+      </div>
+    </AbsoluteFill>
+  )
+}

artifacts/glm52-rise-video/src/index.tsx

@@ -0,0 +1,36 @@
+import { Composition, registerRoot } from "remotion"
+import { GLM52Rise } from "./video"
+import { NZSheep } from "./sheep"
+import { NovelTokens } from "./novel"
+import { FlashShare } from "./flash"
+import { MiniMaxClimb } from "./minimax"
+import { JuneTotals } from "./june"
+
+function Root() {
+  return (
+    <>
+      <Composition id="GLM52Rise" component={GLM52Rise} durationInFrames={240} fps={30} width={1080} height={1080} />
+      <Composition id="NZSheep" component={NZSheep} durationInFrames={150} fps={30} width={1080} height={1080} />
+      <Composition
+        id="NovelTokens"
+        component={NovelTokens}
+        durationInFrames={150}
+        fps={30}
+        width={1080}
+        height={1080}
+      />
+      <Composition id="FlashShare" component={FlashShare} durationInFrames={165} fps={30} width={1080} height={1080} />
+      <Composition
+        id="MiniMaxClimb"
+        component={MiniMaxClimb}
+        durationInFrames={165}
+        fps={30}
+        width={1080}
+        height={1080}
+      />
+      <Composition id="JuneTotals" component={JuneTotals} durationInFrames={1} fps={30} width={1080} height={1080} />
+    </>
+  )
+}
+
+registerRoot(Root)

artifacts/glm52-rise-video/src/june.tsx

@@ -0,0 +1,144 @@
+import React from "react"
+import { AbsoluteFill } from "remotion"
+
+const c = {
+  bg: "#ffffff",
+  ink: "#161616",
+  muted: "#5c5c5c",
+  faint: "#808080",
+  line: "#e6e6e6",
+  dot: "#dcdcdc",
+  accent: "#3b5cf6",
+}
+const MONO = '"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace'
+
+const DOT_MASK =
+  "url(\"data:image/svg+xml,%3Csvg viewBox='0 0 6 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0H2V2H0V0Z' fill='black'/%3E%3C/svg%3E\")"
+
+// verified: OpenCode Go (tier=Go, dataset=zen), June 1-30, 2026.
+// 72.78T tokens · 651.4M requests · 11.42M sessions -> rounded headline figures.
+
+function DataWordmark({ height = 30 }: { height?: number }) {
+  return (
+    <svg width={(height * 66) / 20} height={height} viewBox="0 0 66 20" fill="none" style={{ color: c.ink }}>
+      <path opacity="0.2" d="M12 16H4V8H12V16Z" fill="currentColor" />
+      <path d="M12 4H4V16H12V4ZM16 20H0V0H16V20Z" fill="currentColor" />
+      <path
+        d="M63.3543 16L62.5119 12.8711H58.6437L57.8013 16H55.7383L59.2454 4H61.9618L65.4689 16H63.3543ZM61.0678 7.851L60.6896 5.94269H60.4489L60.0707 7.851L59.1595 11.1347H61.9962L61.0678 7.851Z"
+        fill="currentColor"
+      />
+      <path d="M52.5951 5.87392V16H50.4461V5.87392H47.4375V4H55.6209V5.87392H52.5951Z" fill="currentColor" />
+      <path
+        d="M45.2059 16L44.3635 12.8711H40.4953L39.6529 16H37.5898L41.097 4H43.8133L47.3205 16H45.2059ZM42.9194 7.851L42.5411 5.94269H42.3004L41.9222 7.851L41.011 11.1347H43.8477L42.9194 7.851Z"
+        fill="currentColor"
+      />
+      <path
+        d="M28 4H32.0917C32.8138 4 33.4556 4.11461 34.0172 4.34384C34.5903 4.5616 35.0716 4.9169 35.4613 5.40974C35.8625 5.89112 36.1662 6.51003 36.3725 7.26648C36.5788 8.02292 36.6819 8.9341 36.6819 10C36.6819 11.0659 36.5788 11.9771 36.3725 12.7335C36.1662 13.49 35.8625 14.1146 35.4613 14.6075C35.0716 15.0888 34.5903 15.4441 34.0172 15.6734C33.4556 15.8911 32.8138 16 32.0917 16H28V4ZM32.0917 14.1261C32.8252 14.1261 33.3926 13.9026 33.7937 13.4556C34.1948 12.9971 34.3954 12.3152 34.3954 11.4097V8.59026C34.3954 7.68481 34.1948 7.0086 33.7937 6.5616C33.3926 6.10315 32.8252 5.87392 32.0917 5.87392H30.149V14.1261H32.0917Z"
+        fill="currentColor"
+      />
+    </svg>
+  )
+}
+
+function DotBand() {
+  return (
+    <div
+      style={{
+        height: 12,
+        background: c.dot,
+        WebkitMaskImage: DOT_MASK,
+        maskImage: DOT_MASK,
+        WebkitMaskSize: "12px 12px",
+        maskSize: "12px 12px",
+        WebkitMaskRepeat: "repeat",
+        maskRepeat: "repeat",
+        WebkitMaskPosition: "left top",
+        maskPosition: "left top",
+      }}
+    />
+  )
+}
+
+function Metric({ value, label }: { value: string; label: string }) {
+  return (
+    <div>
+      <div
+        style={{
+          fontSize: 92,
+          fontWeight: 600,
+          letterSpacing: -3,
+          lineHeight: 1,
+          fontVariantNumeric: "tabular-nums",
+          marginLeft: -8, // align the glyph's visual left edge to the column
+        }}
+      >
+        {value}
+      </div>
+      <div style={{ marginTop: 16, fontSize: 24, fontWeight: 500, color: c.muted, letterSpacing: 1 }}>{label}</div>
+    </div>
+  )
+}
+
+export function JuneTotals() {
+  return (
+    <AbsoluteFill style={{ background: c.bg, color: c.ink, fontFamily: MONO, padding: 72, boxSizing: "border-box" }}>
+      <div style={{ height: "100%", display: "flex", flexDirection: "column" }}>
+        {/* header */}
+        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", marginBottom: 22 }}>
+          <DataWordmark height={30} />
+          <div style={{ fontSize: 20, fontWeight: 500, color: c.faint, letterSpacing: 1 }}>MONTHLY RECAP</div>
+        </div>
+        <DotBand />
+
+        {/* hero */}
+        <div style={{ flex: 1, display: "flex", flexDirection: "column", justifyContent: "center" }}>
+          <div style={{ fontSize: 25, fontWeight: 600, color: c.muted, letterSpacing: 3 }}>OPENCODE GO · JUNE 2026</div>
+          <div style={{ marginTop: 14 }}>
+            <div
+              style={{
+                fontSize: 300,
+                fontWeight: 600,
+                letterSpacing: -10,
+                lineHeight: 0.82,
+                color: c.accent,
+                marginLeft: -22,
+              }}
+            >
+              73T
+            </div>
+            <div style={{ fontSize: 50, fontWeight: 600, color: c.ink, marginTop: 10 }}>tokens processed</div>
+          </div>
+
+          {/* supporting metrics */}
+          <div
+            style={{
+              display: "grid",
+              gridTemplateColumns: "1fr 1fr",
+              marginTop: 60,
+              paddingTop: 40,
+              borderTop: `1px solid ${c.line}`,
+            }}
+          >
+            <Metric value="650M" label="requests" />
+            <Metric value="11M" label="sessions" />
+          </div>
+        </div>
+
+        {/* footer */}
+        <DotBand />
+        <div
+          style={{
+            display: "flex",
+            justifyContent: "flex-end",
+            alignItems: "center",
+            marginTop: 22,
+            fontSize: 20,
+            fontWeight: 500,
+          }}
+        >
+          <div style={{ color: c.ink }}>opencode.ai/data</div>
+        </div>
+      </div>
+    </AbsoluteFill>
+  )
+}

artifacts/glm52-rise-video/src/minimax.tsx

@@ -0,0 +1,201 @@
+import React from "react"
+import { AbsoluteFill, interpolate, spring, useCurrentFrame, useVideoConfig } from "remotion"
+
+const c = {
+  bg: "#ffffff",
+  ink: "#161616",
+  muted: "#5c5c5c",
+  faint: "#808080",
+  line: "#e6e6e6",
+  dot: "#e4e4e4",
+  accent: "#3b5cf6",
+  accentHi: "#5b78ff",
+  accentDim: "#aebcf3",
+}
+const MONO = '"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace'
+
+const DOT_MASK =
+  "url(\"data:image/svg+xml,%3Csvg viewBox='0 0 6 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0H2V2H0V0Z' fill='black'/%3E%3C/svg%3E\")"
+
+// verified: minimax-m3, OpenCode Go (tier=Go, dataset=zen), weekly total_tokens.
+// W26 2.559T is +23.2% / +482.3B vs W25 2.077T.
+const weeks = [
+  { label: "May 25", t: 0.008 },
+  { label: "Jun 1", t: 0.429 },
+  { label: "Jun 8", t: 1.192 },
+  { label: "Jun 15", t: 2.077 },
+  { label: "Jun 22", t: 2.559, latest: true },
+]
+const AXIS_MAX = 3.0
+
+function DataWordmark({ height = 30 }: { height?: number }) {
+  return (
+    <svg width={(height * 66) / 20} height={height} viewBox="0 0 66 20" fill="none" style={{ color: c.ink }}>
+      <path opacity="0.2" d="M12 16H4V8H12V16Z" fill="currentColor" />
+      <path d="M12 4H4V16H12V4ZM16 20H0V0H16V20Z" fill="currentColor" />
+      <path
+        d="M63.3543 16L62.5119 12.8711H58.6437L57.8013 16H55.7383L59.2454 4H61.9618L65.4689 16H63.3543ZM61.0678 7.851L60.6896 5.94269H60.4489L60.0707 7.851L59.1595 11.1347H61.9962L61.0678 7.851Z"
+        fill="currentColor"
+      />
+      <path d="M52.5951 5.87392V16H50.4461V5.87392H47.4375V4H55.6209V5.87392H52.5951Z" fill="currentColor" />
+      <path
+        d="M45.2059 16L44.3635 12.8711H40.4953L39.6529 16H37.5898L41.097 4H43.8133L47.3205 16H45.2059ZM42.9194 7.851L42.5411 5.94269H42.3004L41.9222 7.851L41.011 11.1347H43.8477L42.9194 7.851Z"
+        fill="currentColor"
+      />
+      <path
+        d="M28 4H32.0917C32.8138 4 33.4556 4.11461 34.0172 4.34384C34.5903 4.5616 35.0716 4.9169 35.4613 5.40974C35.8625 5.89112 36.1662 6.51003 36.3725 7.26648C36.5788 8.02292 36.6819 8.9341 36.6819 10C36.6819 11.0659 36.5788 11.9771 36.3725 12.7335C36.1662 13.49 35.8625 14.1146 35.4613 14.6075C35.0716 15.0888 34.5903 15.4441 34.0172 15.6734C33.4556 15.8911 32.8138 16 32.0917 16H28V4ZM32.0917 14.1261C32.8252 14.1261 33.3926 13.9026 33.7937 13.4556C34.1948 12.9971 34.3954 12.3152 34.3954 11.4097V8.59026C34.3954 7.68481 34.1948 7.0086 33.7937 6.5616C33.3926 6.10315 32.8252 5.87392 32.0917 5.87392H30.149V14.1261H32.0917Z"
+        fill="currentColor"
+      />
+    </svg>
+  )
+}
+
+const CHART_H = 420 // multiple of 12 so the dotted tracks never clip
+
+export function MiniMaxClimb() {
+  const frame = useCurrentFrame()
+  const { fps } = useVideoConfig()
+
+  const grow = (i: number) =>
+    Math.min(
+      1,
+      Math.max(0, spring({ frame: frame - 22 - i * 9, fps, config: { damping: 18, stiffness: 110, mass: 0.6 } })),
+    )
+
+  return (
+    <AbsoluteFill style={{ background: c.bg, color: c.ink, fontFamily: MONO, padding: 72, boxSizing: "border-box" }}>
+      <div style={{ height: "100%", display: "flex", flexDirection: "column" }}>
+        {/* header */}
+        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center" }}>
+          <DataWordmark height={30} />
+          <div style={{ fontSize: 20, fontWeight: 500, color: c.faint, letterSpacing: 1 }}>JUN 22–28, 2026</div>
+        </div>
+
+        {/* headline (static) */}
+        <div style={{ marginTop: 50 }}>
+          <div style={{ fontSize: 23, fontWeight: 600, color: c.muted, letterSpacing: 2 }}>
+            OPENCODE GO · WEEKLY TOKENS
+          </div>
+          <div
+            style={{ display: "flex", justifyContent: "space-between", alignItems: "baseline", gap: 24, marginTop: 14 }}
+          >
+            <div style={{ fontSize: 62, fontWeight: 600, letterSpacing: -2, lineHeight: 1 }}>MiniMax M3</div>
+            <div style={{ textAlign: "right", flexShrink: 0 }}>
+              <div
+                style={{
+                  fontSize: 84,
+                  fontWeight: 600,
+                  letterSpacing: -2,
+                  lineHeight: 1,
+                  color: c.accent,
+                  fontVariantNumeric: "tabular-nums",
+                }}
+              >
+                +23.2%
+              </div>
+              <div style={{ fontSize: 19, fontWeight: 500, color: c.muted, letterSpacing: 1, marginTop: 6 }}>
+                WEEK OVER WEEK
+              </div>
+            </div>
+          </div>
+        </div>
+
+        {/* column chart */}
+        <div style={{ flex: 1, display: "flex", alignItems: "flex-end", marginTop: 30 }}>
+          <div style={{ width: "100%", display: "flex", alignItems: "flex-end", gap: 30 }}>
+            {weeks.map((w, i) => {
+              const g = grow(i)
+              const h = Math.round((w.t / AXIS_MAX) * CHART_H * g)
+              return (
+                <div key={w.label} style={{ flex: 1, display: "flex", flexDirection: "column", alignItems: "center" }}>
+                  {/* value + bar */}
+                  <div style={{ position: "relative", width: "100%", height: CHART_H }}>
+                    {/* dotted track */}
+                    <div
+                      style={{
+                        position: "absolute",
+                        inset: 0,
+                        background: c.dot,
+                        WebkitMaskImage: DOT_MASK,
+                        maskImage: DOT_MASK,
+                        WebkitMaskSize: "12px 12px",
+                        maskSize: "12px 12px",
+                        WebkitMaskRepeat: "repeat",
+                        maskRepeat: "repeat",
+                        WebkitMaskPosition: "left bottom",
+                        maskPosition: "left bottom",
+                      }}
+                    />
+                    {/* fill */}
+                    <div
+                      style={{
+                        position: "absolute",
+                        left: 0,
+                        right: 0,
+                        bottom: 0,
+                        height: h,
+                        background: w.latest ? c.accent : c.accentDim,
+                        borderTop: w.latest ? `3px solid ${c.accentHi}` : "none",
+                      }}
+                    />
+                    {/* value label */}
+                    <div
+                      style={{
+                        position: "absolute",
+                        left: 0,
+                        right: 0,
+                        bottom: h + 10,
+                        textAlign: "center",
+                        fontSize: 26,
+                        fontWeight: w.latest ? 600 : 500,
+                        color: w.latest ? c.accent : c.muted,
+                        fontVariantNumeric: "tabular-nums",
+                        opacity: interpolate(g, [0.5, 1], [0, 1], {
+                          extrapolateLeft: "clamp",
+                          extrapolateRight: "clamp",
+                        }),
+                      }}
+                    >
+                      {w.t.toFixed(2)}T
+                    </div>
+                  </div>
+                  {/* week label */}
+                  <div
+                    style={{
+                      marginTop: 14,
+                      fontSize: 18,
+                      fontWeight: 500,
+                      color: w.latest ? c.ink : c.faint,
+                    }}
+                  >
+                    {w.label}
+                  </div>
+                </div>
+              )
+            })}
+          </div>
+        </div>
+
+        {/* footer */}
+        <div
+          style={{
+            display: "flex",
+            justifyContent: "space-between",
+            alignItems: "center",
+            marginTop: 22,
+            paddingTop: 22,
+            borderTop: `1px solid ${c.line}`,
+            fontSize: 20,
+            fontWeight: 500,
+          }}
+        >
+          <div style={{ display: "inline-flex", alignItems: "center", gap: 9, color: c.muted }}>
+            <span style={{ width: 13, height: 13, background: c.accent, display: "inline-block" }} />
+            2.56T tokens last week · +482.3B added
+          </div>
+          <div style={{ color: c.ink }}>opencode.ai/data</div>
+        </div>
+      </div>
+    </AbsoluteFill>
+  )
+}

artifacts/glm52-rise-video/src/novel.tsx

@@ -0,0 +1,135 @@
+import React from "react"
+import { AbsoluteFill, Easing, Img, interpolate, staticFile, useCurrentFrame } from "remotion"
+
+const c = {
+  white: "#ffffff",
+  dim: "rgba(255,255,255,0.74)",
+}
+const MONO = '"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace'
+
+// verified: OpenCode Go, week of Jun 22-28, 2026 (2026-W26)
+// 19,642,742,937,105 tokens / 173,651,197 requests = 113,116 tokens/request
+const AVG = 113116
+const K = Math.round(AVG / 1000) // 113
+
+const nf = new Intl.NumberFormat("en-US")
+
+function DataWordmark({ height = 30 }: { height?: number }) {
+  return (
+    <svg width={(height * 66) / 20} height={height} viewBox="0 0 66 20" fill="none" style={{ color: c.white }}>
+      <path opacity="0.35" d="M12 16H4V8H12V16Z" fill="currentColor" />
+      <path d="M12 4H4V16H12V4ZM16 20H0V0H16V20Z" fill="currentColor" />
+      <path
+        d="M63.3543 16L62.5119 12.8711H58.6437L57.8013 16H55.7383L59.2454 4H61.9618L65.4689 16H63.3543ZM61.0678 7.851L60.6896 5.94269H60.4489L60.0707 7.851L59.1595 11.1347H61.9962L61.0678 7.851Z"
+        fill="currentColor"
+      />
+      <path d="M52.5951 5.87392V16H50.4461V5.87392H47.4375V4H55.6209V5.87392H52.5951Z" fill="currentColor" />
+      <path
+        d="M45.2059 16L44.3635 12.8711H40.4953L39.6529 16H37.5898L41.097 4H43.8133L47.3205 16H45.2059ZM42.9194 7.851L42.5411 5.94269H42.3004L41.9222 7.851L41.011 11.1347H43.8477L42.9194 7.851Z"
+        fill="currentColor"
+      />
+      <path
+        d="M28 4H32.0917C32.8138 4 33.4556 4.11461 34.0172 4.34384C34.5903 4.5616 35.0716 4.9169 35.4613 5.40974C35.8625 5.89112 36.1662 6.51003 36.3725 7.26648C36.5788 8.02292 36.6819 8.9341 36.6819 10C36.6819 11.0659 36.5788 11.9771 36.3725 12.7335C36.1662 13.49 35.8625 14.1146 35.4613 14.6075C35.0716 15.0888 34.5903 15.4441 34.0172 15.6734C33.4556 15.8911 32.8138 16 32.0917 16H28V4ZM32.0917 14.1261C32.8252 14.1261 33.3926 13.9026 33.7937 13.4556C34.1948 12.9971 34.3954 12.3152 34.3954 11.4097V8.59026C34.3954 7.68481 34.1948 7.0086 33.7937 6.5616C33.3926 6.10315 32.8252 5.87392 32.0917 5.87392H30.149V14.1261H32.0917Z"
+        fill="currentColor"
+      />
+    </svg>
+  )
+}
+
+export function NovelTokens() {
+  const frame = useCurrentFrame()
+
+  const k = Math.round(
+    K *
+      interpolate(frame, [18, 92], [0, 1], {
+        extrapolateLeft: "clamp",
+        extrapolateRight: "clamp",
+        easing: Easing.out(Easing.cubic),
+      }),
+  )
+
+  const zoom = interpolate(frame, [0, 150], [1.06, 1.12], {
+    extrapolateRight: "clamp",
+    easing: Easing.inOut(Easing.quad),
+  })
+
+  return (
+    <AbsoluteFill style={{ background: "#0c0c0c", overflow: "hidden" }}>
+      <Img
+        src={staticFile("book.jpg")}
+        style={{
+          position: "absolute",
+          width: "100%",
+          height: "100%",
+          objectFit: "cover",
+          objectPosition: "center 34%",
+          transform: `scale(${zoom})`,
+          transformOrigin: "center 30%",
+        }}
+      />
+
+      {/* legibility scrims */}
+      <div
+        style={{
+          position: "absolute",
+          inset: 0,
+          background:
+            "linear-gradient(to bottom, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0) 20%, rgba(0,0,0,0.1) 44%, rgba(0,0,0,0.86) 100%)",
+        }}
+      />
+
+      <div
+        style={{
+          position: "absolute",
+          inset: 0,
+          boxSizing: "border-box",
+          padding: 64,
+          color: c.white,
+          fontFamily: MONO,
+          display: "flex",
+          flexDirection: "column",
+          justifyContent: "space-between",
+        }}
+      >
+        {/* header */}
+        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center" }}>
+          <DataWordmark height={30} />
+          <div style={{ fontSize: 20, fontWeight: 500, color: c.dim, letterSpacing: 1 }}>JUN 22–28, 2026</div>
+        </div>
+
+        {/* bottom block */}
+        <div>
+          <div style={{ fontSize: 23, fontWeight: 600, color: c.dim, letterSpacing: 2, marginBottom: 8 }}>
+            OPENCODE GO · LAST WEEK
+          </div>
+          <div
+            style={{
+              fontSize: 168,
+              fontWeight: 600,
+              lineHeight: 0.92,
+              letterSpacing: -5,
+              fontVariantNumeric: "tabular-nums",
+            }}
+          >
+            {k}K
+          </div>
+          <div style={{ fontSize: 50, fontWeight: 600, letterSpacing: -1, marginTop: 4 }}>tokens per request</div>
+
+          <div
+            style={{
+              display: "flex",
+              justifyContent: "space-between",
+              alignItems: "center",
+              marginTop: 30,
+              fontSize: 20,
+              fontWeight: 500,
+            }}
+          >
+            <div style={{ color: c.dim }}>{nf.format(AVG)} tokens / request · last week</div>
+            <div style={{ color: c.white }}>opencode.ai/data</div>
+          </div>
+        </div>
+      </div>
+    </AbsoluteFill>
+  )
+}

artifacts/glm52-rise-video/src/sheep.tsx

@@ -0,0 +1,139 @@
+import React from "react"
+import { AbsoluteFill, Easing, Img, interpolate, staticFile, useCurrentFrame } from "remotion"
+
+const c = {
+  white: "#ffffff",
+  dim: "rgba(255,255,255,0.72)",
+  faint: "rgba(255,255,255,0.55)",
+}
+const MONO = '"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace'
+
+// verified: NZ OpenCode Go, week of Jun 22-28, 2026 (2026-W26)
+const TOKENS = 40_915_594_381 // 40.9B
+const SHEEP = 23_600_000 // 23.6M
+const PER_SHEEP = Math.round(TOKENS / SHEEP) // 1,734
+const nf = new Intl.NumberFormat("en-US")
+
+// the correct opencode "DATA" wordmark (white, over photo)
+function DataWordmark({ height = 30 }: { height?: number }) {
+  return (
+    <svg width={(height * 66) / 20} height={height} viewBox="0 0 66 20" fill="none" style={{ color: c.white }}>
+      <path opacity="0.35" d="M12 16H4V8H12V16Z" fill="currentColor" />
+      <path d="M12 4H4V16H12V4ZM16 20H0V0H16V20Z" fill="currentColor" />
+      <path
+        d="M63.3543 16L62.5119 12.8711H58.6437L57.8013 16H55.7383L59.2454 4H61.9618L65.4689 16H63.3543ZM61.0678 7.851L60.6896 5.94269H60.4489L60.0707 7.851L59.1595 11.1347H61.9962L61.0678 7.851Z"
+        fill="currentColor"
+      />
+      <path d="M52.5951 5.87392V16H50.4461V5.87392H47.4375V4H55.6209V5.87392H52.5951Z" fill="currentColor" />
+      <path
+        d="M45.2059 16L44.3635 12.8711H40.4953L39.6529 16H37.5898L41.097 4H43.8133L47.3205 16H45.2059ZM42.9194 7.851L42.5411 5.94269H42.3004L41.9222 7.851L41.011 11.1347H43.8477L42.9194 7.851Z"
+        fill="currentColor"
+      />
+      <path
+        d="M28 4H32.0917C32.8138 4 33.4556 4.11461 34.0172 4.34384C34.5903 4.5616 35.0716 4.9169 35.4613 5.40974C35.8625 5.89112 36.1662 6.51003 36.3725 7.26648C36.5788 8.02292 36.6819 8.9341 36.6819 10C36.6819 11.0659 36.5788 11.9771 36.3725 12.7335C36.1662 13.49 35.8625 14.1146 35.4613 14.6075C35.0716 15.0888 34.5903 15.4441 34.0172 15.6734C33.4556 15.8911 32.8138 16 32.0917 16H28V4ZM32.0917 14.1261C32.8252 14.1261 33.3926 13.9026 33.7937 13.4556C34.1948 12.9971 34.3954 12.3152 34.3954 11.4097V8.59026C34.3954 7.68481 34.1948 7.0086 33.7937 6.5616C33.3926 6.10315 32.8252 5.87392 32.0917 5.87392H30.149V14.1261H32.0917Z"
+        fill="currentColor"
+      />
+    </svg>
+  )
+}
+
+export function NZSheep() {
+  const frame = useCurrentFrame()
+
+  const count = Math.round(
+    PER_SHEEP *
+      interpolate(frame, [18, 90], [0, 1], {
+        extrapolateLeft: "clamp",
+        extrapolateRight: "clamp",
+        easing: Easing.out(Easing.cubic),
+      }),
+  )
+
+  // slow Ken Burns push-in (scale up only — never reveals an edge)
+  const zoom = interpolate(frame, [0, 150], [1.06, 1.12], {
+    extrapolateRight: "clamp",
+    easing: Easing.inOut(Easing.quad),
+  })
+
+  return (
+    <AbsoluteFill style={{ background: "#0c0c0c", overflow: "hidden" }}>
+      {/* the sheep, staring */}
+      <Img
+        src={staticFile("sheep.jpg")}
+        style={{
+          position: "absolute",
+          width: "100%",
+          height: "100%",
+          objectFit: "cover",
+          objectPosition: "center 38%",
+          transform: `scale(${zoom})`,
+          transformOrigin: "center 35%",
+        }}
+      />
+
+      {/* legibility scrims */}
+      <div
+        style={{
+          position: "absolute",
+          inset: 0,
+          background:
+            "linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0) 22%, rgba(0,0,0,0) 48%, rgba(0,0,0,0.78) 100%)",
+        }}
+      />
+
+      {/* content */}
+      <div
+        style={{
+          position: "absolute",
+          inset: 0,
+          boxSizing: "border-box",
+          padding: 64,
+          color: c.white,
+          fontFamily: MONO,
+          display: "flex",
+          flexDirection: "column",
+          justifyContent: "space-between",
+        }}
+      >
+        {/* header */}
+        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center" }}>
+          <DataWordmark height={30} />
+          <div style={{ fontSize: 20, fontWeight: 500, color: c.dim, letterSpacing: 1 }}>JUN 22–28, 2026</div>
+        </div>
+
+        {/* bottom block */}
+        <div>
+          <div style={{ fontSize: 23, fontWeight: 600, color: c.dim, letterSpacing: 2, marginBottom: 8 }}>
+            OPENCODE GO · NEW ZEALAND
+          </div>
+          <div
+            style={{
+              fontSize: 168,
+              fontWeight: 600,
+              lineHeight: 0.92,
+              letterSpacing: -5,
+              fontVariantNumeric: "tabular-nums",
+            }}
+          >
+            {nf.format(count)}
+          </div>
+          <div style={{ fontSize: 50, fontWeight: 600, letterSpacing: -1, marginTop: 4 }}>tokens per sheep</div>
+
+          <div
+            style={{
+              display: "flex",
+              justifyContent: "space-between",
+              alignItems: "center",
+              marginTop: 34,
+              fontSize: 20,
+              fontWeight: 500,
+            }}
+          >
+            <div style={{ color: c.dim }}>40.9B tokens ÷ 23.6M sheep · last week</div>
+            <div style={{ color: c.white }}>opencode.ai/data</div>
+          </div>
+        </div>
+      </div>
+    </AbsoluteFill>
+  )
+}

artifacts/glm52-rise-video/src/video.tsx

@@ -0,0 +1,254 @@
+import React from "react"
+import { AbsoluteFill, Easing, interpolate, useCurrentFrame, useVideoConfig } from "remotion"
+import { days, launchIndex, glmWeekTokensT, segments } from "./data"
+
+// stats.opencode.ai design tokens (light theme)
+const c = {
+  bg: "#ffffff",
+  ink: "#161616",
+  muted: "#5c5c5c",
+  faint: "#808080",
+  line: "#e6e6e6",
+  dot: "#ededed",
+  accent: "#3b5cf6",
+  accentHi: "#5b78ff",
+}
+
+const MONO = '"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace'
+const W = 1080
+
+const DOT_MASK =
+  "url(\"data:image/svg+xml,%3Csvg viewBox='0 0 6 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0H2V2H0V0Z' fill='black'/%3E%3C/svg%3E\")"
+
+const field = segments.filter((s) => !s.hero)
+const glmColor = segments.find((s) => s.hero)!.color
+
+const clamp = (v: number, lo: number, hi: number) => Math.min(hi, Math.max(lo, v))
+
+// the correct opencode "DATA" wordmark (from stats.opencode.ai header)
+function DataWordmark({ height = 30, color = c.ink }: { height?: number; color?: string }) {
+  return (
+    <svg width={(height * 66) / 20} height={height} viewBox="0 0 66 20" fill="none" style={{ color }}>
+      <path opacity="0.2" d="M12 16H4V8H12V16Z" fill="currentColor" />
+      <path d="M12 4H4V16H12V4ZM16 20H0V0H16V20Z" fill="currentColor" />
+      <path
+        d="M63.3543 16L62.5119 12.8711H58.6437L57.8013 16H55.7383L59.2454 4H61.9618L65.4689 16H63.3543ZM61.0678 7.851L60.6896 5.94269H60.4489L60.0707 7.851L59.1595 11.1347H61.9962L61.0678 7.851Z"
+        fill="currentColor"
+      />
+      <path d="M52.5951 5.87392V16H50.4461V5.87392H47.4375V4H55.6209V5.87392H52.5951Z" fill="currentColor" />
+      <path
+        d="M45.2059 16L44.3635 12.8711H40.4953L39.6529 16H37.5898L41.097 4H43.8133L47.3205 16H45.2059ZM42.9194 7.851L42.5411 5.94269H42.3004L41.9222 7.851L41.011 11.1347H43.8477L42.9194 7.851Z"
+        fill="currentColor"
+      />
+      <path
+        d="M28 4H32.0917C32.8138 4 33.4556 4.11461 34.0172 4.34384C34.5903 4.5616 35.0716 4.9169 35.4613 5.40974C35.8625 5.89112 36.1662 6.51003 36.3725 7.26648C36.5788 8.02292 36.6819 8.9341 36.6819 10C36.6819 11.0659 36.5788 11.9771 36.3725 12.7335C36.1662 13.49 35.8625 14.1146 35.4613 14.6075C35.0716 15.0888 34.5903 15.4441 34.0172 15.6734C33.4556 15.8911 32.8138 16 32.0917 16H28V4ZM32.0917 14.1261C32.8252 14.1261 33.3926 13.9026 33.7937 13.4556C34.1948 12.9971 34.3954 12.3152 34.3954 11.4097V8.59026C34.3954 7.68481 34.1948 7.0086 33.7937 6.5616C33.3926 6.10315 32.8252 5.87392 32.0917 5.87392H30.149V14.1261H32.0917Z"
+        fill="currentColor"
+      />
+    </svg>
+  )
+}
+
+export function GLM52Rise() {
+  const frame = useCurrentFrame()
+  const { fps } = useVideoConfig()
+
+  // ---------- virtual camera ----------
+  // open zoomed-in on the field, pan right while the blue fills, then pull back to reveal.
+  const K = [0, 32, 150, 206, 240]
+  const ease = Easing.inOut(Easing.cubic)
+  const opt = { extrapolateLeft: "clamp" as const, extrapolateRight: "clamp" as const, easing: ease }
+  const s = interpolate(frame, K, [1.82, 1.72, 1.72, 1.0, 1.0], opt)
+  let fx = interpolate(frame, K, [420, 438, 760, 540, 540], opt)
+  let fy = interpolate(frame, K, [664, 664, 664, 540, 540], opt)
+  // keep the framing inside the 1080 canvas so edges never reveal black
+  fx = clamp(fx, 540 / s, W - 540 / s)
+  fy = clamp(fy, 540 / s, W - 540 / s)
+  const camera = `translate(${540 - fx * s}px, ${540 - fy * s}px) scale(${s})`
+
+  // ---------- blue sweep (synced to the pan) ----------
+  const p = interpolate(frame, [32, 150], [0, 1], { extrapolateLeft: "clamp", extrapolateRight: "clamp", easing: ease })
+  const revealAmount = p * (days.length - launchIndex) + 0.35
+  const fillOf = (i: number) => clamp(revealAmount - (i - launchIndex), 0, 1)
+
+  // token number climbs as the camera pulls back and the headline re-enters frame
+  const tokensT =
+    glmWeekTokensT *
+    interpolate(frame, [150, 202], [0, 1], {
+      extrapolateLeft: "clamp",
+      extrapolateRight: "clamp",
+      easing: Easing.out(Easing.cubic),
+    })
+
+  // chart geometry
+  const chartH = 440
+  const chartW = 936
+  const gap = 14
+  const EXAGGERATE = 2.876 // broken y-axis: GLM-5.2 magnified ~2.9x for emphasis
+
+  return (
+    <AbsoluteFill style={{ background: c.bg, overflow: "hidden" }}>
+      <div
+        style={{
+          position: "absolute",
+          width: W,
+          height: W,
+          background: c.bg,
+          transformOrigin: "0 0",
+          transform: camera,
+        }}
+      >
+        <div
+          style={{
+            width: W,
+            height: W,
+            boxSizing: "border-box",
+            padding: 72,
+            color: c.ink,
+            fontFamily: MONO,
+            display: "flex",
+            flexDirection: "column",
+          }}
+        >
+          {/* header */}
+          <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center" }}>
+            <DataWordmark height={30} />
+            <div style={{ fontSize: 20, fontWeight: 500, color: c.faint, letterSpacing: 1 }}>JUN 12–25, 2026</div>
+          </div>
+
+          {/* headline (static) */}
+          <div style={{ marginTop: 52 }}>
+            <div style={{ fontSize: 92, fontWeight: 600, lineHeight: 0.98, letterSpacing: -2 }}>
+              GLM-5.2 <span style={{ color: c.accent }}>broke out</span>
+            </div>
+            <div style={{ marginTop: 22, fontSize: 30, fontWeight: 500, color: c.muted }}>
+              From 0 to <span style={{ color: c.ink }}>{tokensT.toFixed(2)}T tokens</span> in a week.
+            </div>
+          </div>
+
+          {/* stacked chart */}
+          <div style={{ flex: 1, display: "flex", alignItems: "flex-end", marginTop: 40 }}>
+            <div
+              style={{
+                position: "relative",
+                width: chartW,
+                height: chartH,
+                margin: "0 auto",
+                borderBottom: `2px solid ${c.ink}`,
+                boxSizing: "border-box",
+              }}
+            >
+              {/* faint dotted backdrop */}
+              <div
+                style={{
+                  position: "absolute",
+                  left: -8,
+                  right: -8,
+                  top: -8,
+                  bottom: 0,
+                  background: c.dot,
+                  WebkitMaskImage: DOT_MASK,
+                  maskImage: DOT_MASK,
+                  WebkitMaskSize: "12px 12px",
+                  maskSize: "12px 12px",
+                  WebkitMaskRepeat: "repeat",
+                  maskRepeat: "repeat",
+                }}
+              />
+
+              {/* columns */}
+              <div style={{ position: "absolute", inset: 0, display: "flex", gap, alignItems: "flex-end" }}>
+                {days.map((d, i) => {
+                  const glmShare = d.glm / d.total
+                  const blueH = Math.round(glmShare * EXAGGERATE * chartH)
+                  const filled = Math.round(blueH * fillOf(i))
+                  const slotGap = filled > 2 ? 5 : 0
+                  const fieldH = chartH - filled - slotGap
+                  const fieldTotal = d.dsf + d.dsp + d.mm + d.others
+                  return (
+                    <div key={i} style={{ position: "relative", flex: 1, height: chartH }}>
+                      {/* gray field of other models (already in place) */}
+                      <div
+                        style={{
+                          position: "absolute",
+                          top: 0,
+                          left: 0,
+                          right: 0,
+                          height: fieldH,
+                          display: "flex",
+                          flexDirection: "column-reverse",
+                        }}
+                      >
+                        {field.map((seg) => (
+                          <div
+                            key={seg.key}
+                            style={{
+                              height: Math.round(((d[seg.key as keyof typeof d] as number) / fieldTotal) * fieldH),
+                              background: seg.color,
+                              borderTop: `2px solid ${c.bg}`,
+                            }}
+                          />
+                        ))}
+                      </div>
+                      {/* GLM-5.2, animates in */}
+                      {filled > 2 && (
+                        <div
+                          style={{
+                            position: "absolute",
+                            left: 0,
+                            right: 0,
+                            bottom: 0,
+                            height: filled,
+                            background: glmColor,
+                            borderTop: `2px solid ${c.accentHi}`,
+                          }}
+                        />
+                      )}
+                    </div>
+                  )
+                })}
+              </div>
+            </div>
+          </div>
+
+          {/* day axis */}
+          <div style={{ display: "flex", gap, width: chartW, margin: "14px auto 0" }}>
+            {days.map((d, i) => (
+              <div
+                key={i}
+                style={{
+                  flex: 1,
+                  textAlign: "center",
+                  fontSize: 15,
+                  fontWeight: 500,
+                  color: i === days.length - 1 ? c.ink : c.faint,
+                }}
+              >
+                {i === 0 || i === launchIndex || i === days.length - 1 ? d.date : ""}
+              </div>
+            ))}
+          </div>
+
+          {/* footer */}
+          <div
+            style={{
+              display: "flex",
+              justifyContent: "space-between",
+              alignItems: "center",
+              marginTop: 28,
+              paddingTop: 22,
+              borderTop: `1px solid ${c.line}`,
+              fontSize: 20,
+              fontWeight: 500,
+            }}
+          >
+            <div style={{ display: "inline-flex", alignItems: "center", gap: 9, color: c.muted }}>
+              <span style={{ width: 13, height: 13, background: c.accent, display: "inline-block" }} />
+              GLM-5.2
+            </div>
+            <div style={{ color: c.ink }}>opencode.ai/data</div>
+          </div>
+        </div>
+      </div>
+    </AbsoluteFill>
+  )
+}

artifacts/glm52-rise-video/sst-env.d.ts

@@ -0,0 +1,10 @@
+/* This file is auto-generated by SST. Do not edit. */
+/* tslint:disable */
+/* eslint-disable */
+/* deno-fmt-ignore-file */
+/* biome-ignore-all lint: auto-generated */
+
+/// <reference path="../../sst-env.d.ts" />
+
+import "sst"
+export {}

docs/cact-server-playbook.md

@@ -0,0 +1,414 @@
+# CACT server deploy playbook
+
+Repeatable runbook for standing up the **CloudAxe Coder Team (CACT)** on a new Linux server: headless OpenCode, the `cact-*` agent pack, provider credentials, systemd supervision, and a CloudAxe desktop connection check.
+
+Use placeholders only. Do not commit live IPs, passwords, or API keys.
+
+## What you are deploying
+
+| Piece | Role |
+| --- | --- |
+| OpenCode headless server | `opencode serve` HTTP API on port `4096` |
+| CACT agents | `~/.config/opencode/agents/cact-*.md` |
+| Global rules | `~/.config/opencode/AGENTS.md` |
+| Provider auth | `~/.local/share/opencode/auth.json` (never in git) |
+| Clients | CloudAxe / OpenCode Desktop (Settings → Add Server), or `curl` / SDK |
+
+`cact-` means **CloudAxe Coder Team**. The normal entry agent is `cact-orchestrator-tech-lead`.
+
+Paths follow XDG defaults (`xdg-basedir`):
+
+| Kind | Default path (Linux) |
+| --- | --- |
+| Config | `~/.config/opencode` |
+| Data (auth, logs) | `~/.local/share/opencode` |
+| State | `~/.local/state/opencode` |
+| Cache | `~/.cache/opencode` |
+
+Override the config directory with `OPENCODE_CONFIG_DIR` only when you intentionally isolate installs.
+
+## Assumptions
+
+- Target OS: Ubuntu 22.04/24.04 or Debian 12 (amd64 or arm64).
+- You have SSH access and can use `sudo`.
+- You will use a **dedicated service user** (example: `opencode`).
+- The CloudAxe desktop expects the **same OpenCode build** as this fork (v2 API). Do not deploy an unrelated older package and assume compatibility.
+- Provider policy: **direct vendor APIs** (Moonshot, DeepSeek, Z.ai). Avoid OpenRouter for CACT agents.
+
+## Pre-flight
+
+Before changing anything on the host:
+
+1. Confirm access scope (sudo / root).
+2. Name the environment: `dev` / `staging` / `production`.
+3. Note existing listeners on `4096` (`ss -tlnp | grep 4096`).
+4. Decide whether port `4096` is exposed raw or only via Nginx TLS on `443`.
+5. Prepare a rollback posture: previous binary path, config tarball location, and how to stop the unit.
+
+Destructive classification for a first install: **risky** (new systemd unit, firewall rules, public listener). Treat password/key rotation and unit replacement on a live host as **destructive** unless a verified backup and rollback path exist.
+
+---
+
+## 1. Target shape
+
+```text
+Internet / operator LAN
+        │
+        ▼
+  [optional Nginx TLS :443]
+        │
+        ▼
+  opencode serve
+    --hostname 0.0.0.0   # or 127.0.0.1 behind Nginx
+    --port 4096
+  + OPENCODE_SERVER_PASSWORD
+  + OPENCODE_SERVER_USERNAME (optional; default opencode)
+        │
+        ▼
+  ~/.config/opencode/agents/cact-*.md
+  ~/.local/share/opencode/auth.json
+```
+
+CLI flags (see `packages/opencode/src/cli/cmd/serve.ts` and `packages/opencode/src/cli/network.ts`):
+
+| Flag | Purpose | Typical CACT value |
+| --- | --- | --- |
+| `--port` | Listen port | `4096` |
+| `--hostname` | Bind address | `0.0.0.0` (direct) or `127.0.0.1` (behind proxy) |
+| `--cors` | Extra browser origins | Desktop / app origins as needed |
+| `--mdns` | LAN discovery | **off** on a VPS |
+
+If `OPENCODE_SERVER_PASSWORD` is unset, the server starts **unsecured** and prints a warning. Always set it for any network-reachable host.
+
+---
+
+## 2. Host bootstrap
+
+Run as a sudo-capable operator.
+
+### 2.1 Packages
+
+```bash
+sudo apt-get update
+sudo apt-get install -y git curl ca-certificates ripgrep build-essential unzip
+```
+
+Install Bun (required to build/run from this repo):
+
+```bash
+curl -fsSL https://bun.sh/install | bash
+# ensure ~/.bun/bin is on PATH for the service user as well
+```
+
+### 2.2 Service user
+
+```bash
+sudo useradd --system --create-home --shell /bin/bash opencode
+sudo -u opencode -H bash -lc 'mkdir -p ~/.config/opencode/agents ~/.local/share/opencode'
+```
+
+### 2.3 Clone and install this fork
+
+Replace `YOUR_FORK_URL` and pin a known-good ref (tag or commit SHA).
+
+```bash
+sudo -u opencode -H bash <<'EOF'
+set -euo pipefail
+cd ~
+git clone YOUR_FORK_URL opencode
+cd opencode
+git checkout YOUR_PINNED_REF
+bun install
+cd packages/opencode
+bun run build   # or the package's documented production build script
+EOF
+```
+
+Install a durable binary on `PATH` for the service user (example: copy the built CLI into `~/bin`):
+
+```bash
+sudo -u opencode -H bash <<'EOF'
+set -euo pipefail
+mkdir -p "$HOME/bin"
+# Adjust source path to match the build output for your platform
+cp -f "$HOME/opencode/packages/opencode/dist/opencode-linux-"*/bin/opencode "$HOME/bin/opencode"
+chmod 755 "$HOME/bin/opencode"
+"$HOME/bin/opencode" --version
+EOF
+```
+
+Record the version string in your ops notes. The CloudAxe desktop must speak the same API generation as this server.
+
+Alternative: install a prebuilt musl binary that matches this fork’s release artifacts (see `packages/opencode/Dockerfile`), then still deploy CACT config as below.
+
+---
+
+## 3. Deploy the CACT agent pack
+
+Copy from a trusted workstation or private backup into the service user’s config. Source of truth on the operator machine is typically:
+
+```text
+~/.config/opencode/AGENTS.md
+~/.config/opencode/agents/cact-*.md
+```
+
+On the server:
+
+```bash
+# From an operator machine (example)
+scp AGENTS.md opencode@SERVER:~/.config/opencode/
+scp cact-*.md opencode@SERVER:~/.config/opencode/agents/
+```
+
+Expected agents:
+
+| Agent file | Model (frontmatter) | Provider |
+| --- | --- | --- |
+| `cact-orchestrator-tech-lead.md` | `moonshotai/kimi-k3` | Moonshot |
+| `cact-frontend-agent.md` | `moonshotai/kimi-k3` | Moonshot |
+| `cact-backend-agent.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-database-agent.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-devops-server-engineer.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-security-agent.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-qa-agent.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-gatekeeper-agent.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-requirements-agent.md` | `zai/glm-5.2` | Z.ai |
+| `cact-requirements-agent-glm-divergent.md` | `zai/glm-5.2` | Z.ai |
+| `cact-research-agent.md` | `zai/glm-5.2` | Z.ai |
+| `cact-research-agent-glm-divergent.md` | `zai/glm-5.2` | Z.ai |
+| `cact-requirements-agent-deepseek.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-research-agent-deepseek.md` | `deepseek/deepseek-v4-pro` | DeepSeek |
+| `cact-documentation-agent.md` | `openrouter/moonshotai/kimi-k2.6` | **Needs fix** |
+
+**OpenRouter callout:** `cact-documentation-agent` still references OpenRouter. Before relying on that agent, change its frontmatter `model` to a direct Moonshot (or other approved direct) model ID and verify with `opencode models --refresh` on the server.
+
+Optional global config (`~/.config/opencode/opencode.jsonc`) may enable MCP servers. Keep secrets out of that file.
+
+Do **not** copy `auth.json`, `.env`, or systemd env files into the git repository.
+
+---
+
+## 4. Secrets and provider auth
+
+### 4.1 Server basic auth env file
+
+```bash
+sudo install -d -m 0750 -o root -g opencode /etc/opencode
+sudo tee /etc/opencode/server.env >/dev/null <<'EOF'
+OPENCODE_SERVER_USERNAME=opencode
+OPENCODE_SERVER_PASSWORD=REPLACE_WITH_LONG_RANDOM_SECRET
+# Optional: pin HOME for the service if the unit does not set User=
+# HOME=/home/opencode
+EOF
+sudo chmod 0640 /etc/opencode/server.env
+sudo chown root:opencode /etc/opencode/server.env
+```
+
+Generate a strong password (`openssl rand -base64 32`). Store it in your password manager; do not paste it into tickets or git.
+
+### 4.2 Provider credentials
+
+As the service user, log in to each vendor API you need:
+
+```bash
+sudo -u opencode -H bash -lc 'export PATH="$HOME/bin:$HOME/.bun/bin:$PATH"; opencode auth login'
+```
+
+Credentials land in `~/.local/share/opencode/auth.json` under that user’s home. Restrict permissions:
+
+```bash
+sudo -u opencode -H bash -lc 'chmod 600 ~/.local/share/opencode/auth.json'
+```
+
+Minimum providers for the current CACT pack: Moonshot, DeepSeek, Z.ai. Refresh model lists after login:
+
+```bash
+sudo -u opencode -H bash -lc 'opencode models --refresh'
+```
+
+---
+
+## 5. systemd unit
+
+Create `/etc/systemd/system/opencode-cact.service`:
+
+```ini
+[Unit]
+Description=OpenCode CACT headless server
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=opencode
+Group=opencode
+WorkingDirectory=/home/opencode
+EnvironmentFile=/etc/opencode/server.env
+Environment=HOME=/home/opencode
+Environment=PATH=/home/opencode/bin:/home/opencode/.bun/bin:/usr/local/bin:/usr/bin
+ExecStart=/home/opencode/bin/opencode serve --hostname 0.0.0.0 --port 4096
+Restart=on-failure
+RestartSec=5
+# Harden lightly; expand after validating tool/workspace needs
+NoNewPrivileges=true
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target
+```
+
+If you terminate TLS at Nginx, bind OpenCode to loopback instead:
+
+```ini
+ExecStart=/home/opencode/bin/opencode serve --hostname 127.0.0.1 --port 4096
+```
+
+Enable and start:
+
+```bash
+sudo systemctl daemon-reload
+sudo systemctl enable --now opencode-cact.service
+sudo systemctl status opencode-cact.service --no-pager
+sudo journalctl -u opencode-cact.service -n 50 --no-pager
+```
+
+### Rollout order
+
+1. Validate binary: `opencode --version`
+2. Validate env file permissions and that `OPENCODE_SERVER_PASSWORD` is set
+3. `daemon-reload` → `restart` (or `start` on first install)
+4. Run health probes (section 7)
+5. Connect desktop
+
+### Rollback
+
+1. `sudo systemctl stop opencode-cact.service`
+2. Restore previous binary into `/home/opencode/bin/opencode`
+3. Restore config/auth from the timestamped snapshot (section 8)
+4. `sudo systemctl start opencode-cact.service`
+5. Re-run health probes
+
+---
+
+## 6. Network and hardening
+
+### 6.1 Firewall
+
+Allow `4096/tcp` only from operator addresses (example with UFW):
+
+```bash
+sudo ufw allow OpenSSH
+sudo ufw allow from OPERATOR_CIDR to any port 4096 proto tcp
+sudo ufw enable
+sudo ufw status verbose
+```
+
+Cloud security groups / nftables should match the same allowlist.
+
+### 6.2 Optional Nginx TLS
+
+When the host must not expose raw HTTP:
+
+1. Bind OpenCode to `127.0.0.1:4096`.
+2. Proxy `https://cact.example.com` → `http://127.0.0.1:4096` with WebSocket upgrade headers if clients use SSE/WS.
+3. Obtain certificates (Let’s Encrypt / ACME).
+4. Point the desktop at `https://cact.example.com` with the same basic-auth username/password.
+
+Keep mDNS disabled on public VPS hosts (`--mdns` unset / false).
+
+### 6.3 Workspace directories
+
+Clients send a project directory via request headers. Ensure the service user can read/write the repos you intend to work in (for example under `/home/opencode/workspaces`). Do not run the server as root.
+
+---
+
+## 7. Prove it
+
+Replace placeholders. Username defaults to `opencode` unless you set `OPENCODE_SERVER_USERNAME`.
+
+### 7.1 Authenticated HTTP
+
+```bash
+export CACT_URL='http://SERVER_IP:4096'
+export CACT_USER='opencode'
+export CACT_PASS='YOUR_SERVER_PASSWORD'
+
+# Global health (many builds)
+curl -fsS -u "$CACT_USER:$CACT_PASS" "$CACT_URL/global/health"
+
+# v2 location probe (desktop also uses this when health routes are odd)
+curl -fsS -u "$CACT_USER:$CACT_PASS" "$CACT_URL/api/location"
+
+# OpenAPI explorer (optional)
+# open "$CACT_URL/doc"
+```
+
+Desktop health checking (`packages/app/src/utils/server-health.ts`) tries, in order:
+
+1. `/api/health`
+2. `/global/health`
+3. Successful `/api/location` (treat as healthy when health routes fail for a non-network reason)
+
+A 404 on one health path with a working `/api/location` can still show **online** in CloudAxe Desktop.
+
+### 7.2 Agent inventory on the host
+
+```bash
+sudo -u opencode -H bash -lc 'opencode agent'   # or the install's list-agents command
+# Confirm cact-orchestrator-tech-lead and other cact-* names appear
+ls -1 /home/opencode/.config/opencode/agents/cact-*.md
+```
+
+### 7.3 CloudAxe Desktop
+
+1. Open **Settings → Servers** (or Add Server).
+2. URL: `http://SERVER_IP:4096` or your HTTPS proxy URL.
+3. Username / password: same as `OPENCODE_SERVER_*`.
+4. Save when health shows online.
+5. Start a session with agent **`cact-orchestrator-tech-lead`**.
+6. Confirm a trivial prompt returns (proves provider auth + model routing).
+
+---
+
+## 8. Upgrade
+
+1. Snapshot:
+
+   ```bash
+   TS=$(date +%Y%m%d-%H%M%S)
+   sudo -u opencode -H bash -lc "tar -C \$HOME -czf \$HOME/cact-backup-\$TS.tgz .config/opencode .local/share/opencode"
+   sudo cp -a /home/opencode/bin/opencode "/home/opencode/bin/opencode.prev-$TS"
+   ```
+
+2. Pull / rebuild / replace the binary at the pinned ref.
+3. `sudo systemctl restart opencode-cact.service`
+4. Re-run section 7 probes and a desktop session.
+5. Keep the previous binary and tarball until the new build is confirmed.
+
+---
+
+## 9. Ops checklist (copy into the ticket)
+
+- [ ] Service user created; OpenCode binary on PATH for that user
+- [ ] `opencode --version` recorded
+- [ ] `AGENTS.md` and all `cact-*.md` installed under `~/.config/opencode/`
+- [ ] `cact-documentation-agent` model switched off OpenRouter (or agent unused)
+- [ ] Provider logins present; `auth.json` mode `600`
+- [ ] `/etc/opencode/server.env` mode `640`, password set
+- [ ] `opencode-cact.service` enabled and active
+- [ ] Firewall / security group allowlists `4096` (or only `443` via Nginx)
+- [ ] `curl` health + `/api/location` succeed with basic auth
+- [ ] Desktop Add Server shows online
+- [ ] Session as `cact-orchestrator-tech-lead` succeeds
+- [ ] Backup tarball + previous binary path documented for rollback
+
+---
+
+## References in this repo
+
+- Serve command: `packages/opencode/src/cli/cmd/serve.ts`
+- Network flags: `packages/opencode/src/cli/network.ts`
+- Global path layout: `packages/core/src/global.ts`
+- Desktop health probes: `packages/app/src/utils/server-health.ts`
+- Upstream-style server docs: `packages/web/src/content/docs/server.mdx`
+- Container packaging of the CLI binary: `packages/opencode/Dockerfile`

infra/console.ts

@@ -150,8 +150,9 @@ const zenLitePrice = new stripe.Price("ZenLitePrice", {
 })
 const ZEN_LITE_PRICE = new sst.Linkable("ZEN_LITE_PRICE", {
   properties: {
-    product: zenLiteProduct.id,
-    price: zenLitePrice.id,
+    // Use existing Go resources in dev's checkout Stripe account.
+    product: $app.stage === "dev" ? "prod_U1tUscpmwtV2bG" : zenLiteProduct.id,
+    price: $app.stage === "dev" ? "price_1T3phhE7fOCwHSD4zS6w2NPy" : zenLitePrice.id,
     priceInr: 92900,
     firstMonth50Coupon: zenLiteCouponFirstMonth50.id,
     firstMonth100Coupon: zenLiteCouponFirstMonth100.id,
@@ -221,6 +222,15 @@ const STRIPE_PUBLISHABLE_KEY = new sst.Secret("STRIPE_PUBLISHABLE_KEY")
 const AUTH_API_URL = new sst.Linkable("AUTH_API_URL", {
   properties: { value: auth.url.apply((url) => url!) },
 })
+// Preview branches have independent databases; do not send their workspaces to shared dev.
+const migrationDomain =
+  $app.stage === "production" ? "opencode.ai" : $app.stage === "dev" ? "dev.opencode.ai" : undefined
+const consoleMigration = new sst.Linkable("ConsoleMigration", {
+  properties: {
+    consoleUrl: migrationDomain ? `https://${migrationDomain}/console` : "",
+    inferenceUrl: migrationDomain ? `https://${migrationDomain}/inference` : "",
+  },
+})
 const STRIPE_WEBHOOK_SECRET = new sst.Linkable("STRIPE_WEBHOOK_SECRET", {
   properties: { value: stripeWebhook.secret },
 })
@@ -235,6 +245,7 @@ const bucketNew = new sst.cloudflare.Bucket("ZenDataNew")
 const DISCORD_INCIDENT_WEBHOOK_URL = new sst.Secret("DISCORD_INCIDENT_WEBHOOK_URL")
 const AWS_SES_ACCESS_KEY_ID = new sst.Secret("AWS_SES_ACCESS_KEY_ID")
 const AWS_SES_SECRET_ACCESS_KEY = new sst.Secret("AWS_SES_SECRET_ACCESS_KEY")
+const ENTERPRISE_SALES_INBOX_EMAIL = new sst.Secret("ENTERPRISE_SALES_INBOX_EMAIL")
 
 const SALESFORCE_CLIENT_ID = new sst.Secret("SALESFORCE_CLIENT_ID")
 const SALESFORCE_CLIENT_SECRET = new sst.Secret("SALESFORCE_CLIENT_SECRET")
@@ -255,6 +266,7 @@ new sst.cloudflare.x.SolidStart("Console", {
     SECRET.UpstashRedisRestUrl,
     SECRET.UpstashRedisRestToken,
     AUTH_API_URL,
+    consoleMigration,
     STRIPE_WEBHOOK_SECRET,
     SECRET.SupportApiKey,
     DISCORD_INCIDENT_WEBHOOK_URL,
@@ -263,6 +275,7 @@ new sst.cloudflare.x.SolidStart("Console", {
     EMAILOCTOPUS_API_KEY,
     AWS_SES_ACCESS_KEY_ID,
     AWS_SES_SECRET_ACCESS_KEY,
+    ENTERPRISE_SALES_INBOX_EMAIL,
     SALESFORCE_CLIENT_ID,
     SALESFORCE_CLIENT_SECRET,
     SALESFORCE_INSTANCE_URL,
@@ -270,6 +283,7 @@ new sst.cloudflare.x.SolidStart("Console", {
     ZEN_LITE_PRICE,
     new sst.Secret("ZEN_LIMITS"),
     new sst.Secret("ZEN_SESSION_SECRET"),
+    new sst.Secret("CLOUDFLARE_ACCESS_CLIENT_ID"),
     ...ZEN_MODELS,
     ...($dev
       ? [
@@ -288,8 +302,12 @@ new sst.cloudflare.x.SolidStart("Console", {
     server: {
       placement: { region: "aws:us-east-2" },
       transform: {
-        worker: {
-          tailConsumers: [{ service: logProcessor.nodes.worker.scriptName }],
+        worker: (args) => {
+          args.compatibilityFlags = $resolve(args.compatibilityFlags).apply((flags) => [
+            ...(flags ?? []),
+            "global_fetch_strictly_public",
+          ])
+          args.tailConsumers = [{ service: logProcessor.nodes.worker.scriptName }]
         },
       },
     },

infra/lake.ts

@@ -67,6 +67,10 @@ const athenaWorkgroup = new aws.athena.Workgroup("LakeAthenaWorkgroup", {
   configuration: {
     enforceWorkgroupConfiguration: true,
     publishCloudwatchMetricsEnabled: true,
+    // Athena bills $5/TB scanned; kill any query that would scan more than 2 TB
+    // so a regression cannot silently burn money. Stats sync full passes scan
+    // ~250 GB as of 2026-07.
+    bytesScannedCutoffPerQuery: 2 * 1024 ** 4,
     resultConfiguration: {
       outputLocation: $interpolate`s3://${athenaResultsBucket.bucket}/`,
     },

infra/stage.ts

@@ -8,6 +8,25 @@ export const zoneID = "430ba34c138cfb5360826c4909f99be8"
 export const awsStage = $app.stage === "production" ? "production" : "dev"
 export const deployAws = $app.stage === awsStage
 
+if ($app.stage === "production") {
+  new cloudflare.DnsRecord("TrustCenter", {
+    zoneId: zoneID,
+    name: "trust.opencode.ai",
+    type: "CNAME",
+    content: "3a69a5bb27875189.vercel-dns-016.com",
+    proxied: false,
+    ttl: 60,
+  })
+
+  new cloudflare.DnsRecord("TrustCenterVerification", {
+    zoneId: zoneID,
+    name: "opencode.ai",
+    type: "TXT",
+    content: "compai-domain-verification=org_6993a99c6200a2d642bb115d",
+    ttl: 60,
+  })
+}
+
 new cloudflare.RegionalHostname("RegionalHostname", {
   hostname: domain,
   regionKey: "us",

infra/stats.ts

@@ -181,17 +181,31 @@ const statsSyncConfig = new sst.Linkable("StatsSyncConfig", {
   },
 })
 
+const r2SqlAuthToken = new sst.Secret("R2SqlAuthToken")
+const r2Sql = new sst.Linkable("R2Sql", {
+  properties: {
+    accountId: "15d29c8639fd3733b1b5486a2acfd968",
+    bucket: `platform-${$app.stage}-lake`,
+    namespace: "inference",
+    table: "generation",
+  },
+})
+
 export const statSync = new sst.aws.Service("StatsSyncService", {
   cluster: lakeCluster,
   architecture: "arm64",
   cpu: "0.25 vCPU",
-  memory: "0.5 GB",
+  // 0.5 GB caused an OOM crash loop: every restart immediately re-ran the 4 Athena
+  // stats queries (~$5/pass) every ~5 minutes instead of hourly.
+  memory: "2 GB",
   image: {
     context: ".",
     dockerfile: "packages/stats/server/Dockerfile",
   },
   command: ["bun", "src/stat-sync.ts"],
-  link: [database, inferenceEvent, statsSyncConfig],
+  // Keep the legacy Athena link and IAM permissions during the first R2-backed
+  // release so reverting the application code remains a one-deploy rollback.
+  link: [database, inferenceEvent, r2Sql, r2SqlAuthToken, statsSyncConfig],
   permissions: lakeQueryPermissions,
   scaling: {
     min: 1,

nix/desktop.nix

@@ -8,6 +8,8 @@
   makeWrapper,
   writableTmpDirAsHomeHook,
   autoPatchelfHook,
+  copyDesktopItems,
+  makeDesktopItem,
   opencode,
 }:
 let
@@ -27,9 +29,12 @@ stdenv.mkDerivation (finalAttrs: {
     nodejs
     makeWrapper
     writableTmpDirAsHomeHook
-  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
+  ]
+  ++ lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
-  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
+    copyDesktopItems
+  ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Ad-hoc sign the .app: --config.mac.identity=null below skips signing.
     darwin.autoSignDarwinBinariesHook
   ];
@@ -38,20 +43,37 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.getLib stdenv.cc.cc)
   ];
 
+  desktopItems = lib.optional stdenv.hostPlatform.isLinux (makeDesktopItem {
+    name = "ai.opencode.desktop";
+    desktopName = "OpenCode";
+    exec = "opencode-desktop %U";
+    icon = "ai.opencode.desktop";
+    # Electron 41 derives X11 WM_CLASS from app.name.
+    startupWMClass = "OpenCode";
+    categories = [ "Development" ];
+  });
+
   env = opencode.env // {
     ELECTRON_SKIP_BINARY_DOWNLOAD = "1";
   };
 
-  # https://github.com/electron/electron/issues/31121
-  # mac builds use a .app bundle which doesnt have this issue
-  postPatch = lib.optionalString stdenv.isLinux ''
-    BASE_PATH=packages/desktop
-    FILES=(src/main/windows.ts)
-    for file in "''${FILES[@]}"; do
-      substituteInPlace $BASE_PATH/$file \
-        --replace-fail "process.resourcesPath" "'$out/opt/opencode-desktop/resources'"
-    done
-  '';
+  postPatch =
+    # NOTE: Relax Bun version check to be a warning instead of an error
+    ''
+      substituteInPlace packages/script/src/index.ts \
+        --replace-fail 'throw new Error(`This script requires bun@''${expectedBunVersionRange}' \
+                       'console.warn(`Warning: This script requires bun@''${expectedBunVersionRange}'
+    ''
+    # https://github.com/electron/electron/issues/31121
+    # mac builds use a .app bundle which doesnt have this issue
+    + lib.optionalString stdenv.isLinux ''
+      BASE_PATH=packages/desktop
+      FILES=(src/main/windows.ts)
+      for file in "''${FILES[@]}"; do
+        substituteInPlace $BASE_PATH/$file \
+          --replace-fail "process.resourcesPath" "'$out/opt/opencode-desktop/resources'"
+      done
+    '';
 
   preBuild = ''
     cp -r "${electron.dist}" $HOME/.electron-dist
@@ -76,27 +98,38 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postBuild
   '';
 
-  installPhase =
-    ''
-      runHook preInstall
-    ''
-    + lib.optionalString stdenv.hostPlatform.isDarwin ''
-      mkdir -p $out/Applications
-      mv dist/mac*/*.app $out/Applications
-      makeWrapper "$out/Applications/OpenCode.app/Contents/MacOS/OpenCode" $out/bin/opencode-desktop
-    ''
-    + lib.optionalString stdenv.hostPlatform.isLinux ''
-      mkdir -p $out/opt/opencode-desktop
-      cp -r dist/linux*-unpacked/{resources,LICENSE*} $out/opt/opencode-desktop
-      makeWrapper ${lib.getExe electron} $out/bin/opencode-desktop \
-        --inherit-argv0 \
-        --set ELECTRON_FORCE_IS_PACKAGED 1 \
-        --add-flags $out/opt/opencode-desktop/resources/app.asar \
-        --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --enable-wayland-ime=true}}"
-    ''
-    + ''
-      runHook postInstall
-    '';
+  installPhase = ''
+    runHook preInstall
+  ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
+    mkdir -p $out/Applications
+    mv dist/mac*/*.app $out/Applications
+    makeWrapper "$out/Applications/OpenCode.app/Contents/MacOS/OpenCode" $out/bin/opencode-desktop
+  ''
+  + lib.optionalString stdenv.hostPlatform.isLinux ''
+    mkdir -p $out/opt/opencode-desktop
+    cp -r dist/linux*-unpacked/{resources,LICENSE*} $out/opt/opencode-desktop
+    install -Dm644 resources/icons/32x32.png \
+      "$out/share/icons/hicolor/32x32/apps/ai.opencode.desktop.png"
+    install -Dm644 resources/icons/64x64.png \
+      "$out/share/icons/hicolor/64x64/apps/ai.opencode.desktop.png"
+    install -Dm644 resources/icons/128x128.png \
+      "$out/share/icons/hicolor/128x128/apps/ai.opencode.desktop.png"
+    install -Dm644 resources/icons/128x128@2x.png \
+      "$out/share/icons/hicolor/256x256/apps/ai.opencode.desktop.png"
+    install -Dm644 resources/icons/icon.png \
+      "$out/share/icons/hicolor/512x512/apps/ai.opencode.desktop.png"
+    install -Dm644 resources/ai.opencode.desktop.metainfo.xml \
+      "$out/share/metainfo/ai.opencode.desktop.metainfo.xml"
+    makeWrapper ${lib.getExe electron} $out/bin/opencode-desktop \
+     --inherit-argv0 \
+     --set ELECTRON_FORCE_IS_PACKAGED 1 \
+     --add-flags $out/opt/opencode-desktop/resources/app.asar \
+     --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --enable-wayland-ime=true}}"
+  ''
+  + ''
+    runHook postInstall
+  '';
 
   autoPatchelfIgnoreMissingDeps = [
     "libc.musl-x86_64.so.1"

nix/hashes.json

@@ -1,8 +1,8 @@
 {
   "nodeModules": {
-    "x86_64-linux": "sha256-drc/Ev96W6b8b0b5LqdZeeGDQ1SMgsz8r5cMO91ei2o=",
-    "aarch64-linux": "sha256-Ti0hNjhUgkVtdb54vea/lpI0ltDwLoPitVyHtx4JGwY=",
-    "aarch64-darwin": "sha256-br4iQ/kK3tSGp+1FefiCTlwsCRhHHhGbKzSixGWaCto=",
-    "x86_64-darwin": "sha256-h7yje968Kyh8/mVY19YmDB5g693XDhIf0XnuwukzCWE="
+    "x86_64-linux": "sha256-RIzpvDBR6GOfU2vjrtgP3LJ/j+gLxkMnJ9VE5Y65Pfo=",
+    "aarch64-linux": "sha256-seE7v8AqxWCiyxNARMiLJNB1MZv15OwEf6r21k68xqg=",
+    "aarch64-darwin": "sha256-rbyK+3qz9bGOxg3HlGW6yh3qeazCaxFcuPfdGbXHsIY=",
+    "x86_64-darwin": "sha256-chSE5WtSQ+qdbj5vTvGmr4rn9gk8eVp3pVeow4gVqYI="
   }
 }

package.json

@@ -6,7 +6,7 @@
   "type": "module",
   "packageManager": "bun@1.3.14",
   "scripts": {
-    "dev": "bun run --cwd packages/opencode --conditions=browser src/index.ts",
+    "dev": "bun run --cwd packages/opencode src/index.ts",
     "dev:desktop": "bun --cwd packages/desktop dev",
     "dev:web": "bun --cwd packages/app dev",
     "dev:console": "ulimit -n 10240 2>/dev/null; bun run --cwd packages/console/app dev",
@@ -19,6 +19,7 @@
     "prepare": "husky",
     "random": "echo 'Random script'",
     "sso": "aws sso login --sso-session=opencode --no-browser",
+    "translate:app": "bun run script/translate-app.ts",
     "test": "echo 'do not run tests from root' && exit 1"
   },
   "workspaces": {
@@ -39,13 +40,14 @@
       "@octokit/rest": "22.0.0",
       "@hono/standard-validator": "0.2.0",
       "@hono/zod-validator": "0.4.2",
-      "@opentui/core": "0.3.4",
-      "@opentui/keymap": "0.3.4",
-      "@opentui/solid": "0.3.4",
-      "@tanstack/solid-virtual": "3.13.28",
+      "@opentui/core": "0.4.5",
+      "@opentui/keymap": "0.4.5",
+      "@opentui/solid": "0.4.5",
+      "@tanstack/solid-virtual": "3.13.32",
       "@shikijs/stream": "4.2.0",
       "ulid": "3.0.1",
       "@kobalte/core": "0.13.11",
+      "@corvu/drawer": "0.2.4",
       "@types/luxon": "3.7.1",
       "@types/node": "24.12.2",
       "@types/semver": "7.7.1",
@@ -68,7 +70,7 @@
       "hono-openapi": "1.1.2",
       "fuzzysort": "3.1.0",
       "luxon": "3.6.1",
-      "marked": "17.0.1",
+      "marked": "18.0.7",
       "marked-shiki": "1.2.1",
       "remend": "1.3.0",
       "@playwright/test": "1.59.1",
@@ -88,6 +90,7 @@
       "@sentry/solid": "10.36.0",
       "@sentry/vite-plugin": "4.6.0",
       "solid-js": "1.9.10",
+      "solid-sonner": "0.3.1",
       "vite-plugin-solid": "2.11.10",
       "@lydell/node-pty": "1.2.0-beta.12"
     }
@@ -104,7 +107,7 @@
     "prettier": "3.6.2",
     "semver": "^7.6.0",
     "sst": "catalog:",
-    "turbo": "2.8.13"
+    "turbo": "2.10.2"
   },
   "dependencies": {
     "@aws-sdk/client-s3": "3.933.0",
@@ -134,25 +137,33 @@
     "electron"
   ],
   "overrides": {
+    "@ai-sdk/anthropic": "3.0.111",
     "@opentui/core": "catalog:",
     "@opentui/keymap": "catalog:",
     "@opentui/solid": "catalog:",
     "@types/bun": "catalog:",
-    "@types/node": "catalog:"
+    "@types/node": "catalog:",
+    "open": "11.0.4"
   },
   "patchedDependencies": {
-    "@ff-labs/fff-bun@0.9.3": "patches/@ff-labs%2Ffff-bun@0.9.3.patch",
+    "@dnd-kit/dom@0.5.0": "patches/@dnd-kit%2Fdom@0.5.0.patch",
     "@npmcli/agent@4.0.2": "patches/@npmcli%2Fagent@4.0.2.patch",
     "@silvia-odwyer/photon-node@0.3.4": "patches/@silvia-odwyer%2Fphoton-node@0.3.4.patch",
     "@standard-community/standard-openapi@0.2.9": "patches/@standard-community%2Fstandard-openapi@0.2.9.patch",
     "solid-js@1.9.10": "patches/solid-js@1.9.10.patch",
-    "@ai-sdk/xai@3.0.82": "patches/@ai-sdk%2Fxai@3.0.82.patch",
+    "@ai-sdk/xai@3.0.102": "patches/@ai-sdk%2Fxai@3.0.102.patch",
+    "@ai-sdk/mistral@3.0.51": "patches/@ai-sdk%2Fmistral@3.0.51.patch",
     "gcp-metadata@8.1.2": "patches/gcp-metadata@8.1.2.patch",
     "pacote@21.5.0": "patches/pacote@21.5.0.patch",
     "@ai-sdk/google@3.0.73": "patches/@ai-sdk%2Fgoogle@3.0.73.patch",
-    "@tanstack/solid-virtual@3.13.28": "patches/@tanstack%2Fsolid-virtual@3.13.28.patch",
     "@pierre/trees@1.0.0-beta.4": "patches/@pierre%2Ftrees@1.0.0-beta.4.patch",
     "@modelcontextprotocol/sdk@1.29.0": "patches/@modelcontextprotocol%2Fsdk@1.29.0.patch",
-    "@tanstack/virtual-core@3.17.0": "patches/@tanstack%2Fvirtual-core@3.17.0.patch"
+    "effect@4.0.0-beta.83": "patches/effect@4.0.0-beta.83.patch",
+    "@tanstack/virtual-core@3.17.3": "patches/@tanstack%2Fvirtual-core@3.17.3.patch",
+    "@ai-sdk/openai-compatible@2.0.41": "patches/@ai-sdk%2Fopenai-compatible@2.0.41.patch",
+    "@ai-sdk/groq@3.0.31": "patches/@ai-sdk%2Fgroq@3.0.31.patch",
+    "@ai-sdk/anthropic@3.0.111": "patches/@ai-sdk%2Fanthropic@3.0.111.patch",
+    "@ai-sdk/amazon-bedrock@4.0.166": "patches/@ai-sdk%2Famazon-bedrock@4.0.166.patch",
+    "@ai-sdk/openai@3.0.88": "patches/@ai-sdk%2Fopenai@3.0.88.patch"
   }
 }

packages/app/AGENTS.md

@@ -11,7 +11,7 @@
 
 - `opencode dev web` proxies `https://app.opencode.ai`, so local UI/CSS changes will not show there.
 - For local UI changes, run the backend and app dev servers separately.
-- Backend (from `packages/opencode`): `bun run --conditions=browser ./src/index.ts serve --port 4096`
+- Backend (from `packages/opencode`): `bun run ./src/index.ts serve --port 4096`
 - App (from `packages/app`): `bun dev -- --port 4444`
 - Open `http://localhost:4444` to verify UI changes (it targets the backend at `http://localhost:4096`).
 
@@ -19,6 +19,21 @@
 
 - Always prefer `createStore` over multiple `createSignal` calls
 
+## Localization
+
+- NEVER hardcode user-visible English strings in production code. ALWAYS use an i18n key for visible copy, placeholders, accessible labels, tooltips, menus, dialogs, toasts, empty states, and displayed errors.
+- When migrating existing copy to i18n, preserve the English text byte-for-byte unless the task explicitly requests a copy change.
+- NEVER change existing English text or English keys to facilitate translation. English is intentional, designer-written source copy; adapt locale-specific translations and i18n mechanics around it.
+- Keep locale complexity behind the shared typed i18n APIs. Feature and component code should use `language.t(...)` for ordinary copy and `language.plural(baseKey, count, params)` for count-sensitive copy. It must not inspect the locale, call `Intl.PluralRules`, construct or select plural-category keys such as `.one` or `.other`, or branch on locale-specific grammar.
+- Prefer complete translated phrases. Do not concatenate grammatical fragments or make call sites assemble sentences. Keep placeholders to irreducible dynamic values such as names, paths, and counts.
+- If a translation cannot be expressed by the current API, deepen the shared language/UI i18n module so one typed call owns locale selection, plural resolution, fallback, and interpolation. Do not leak that machinery into product code.
+- Do not translate from model knowledge alone. Verify terminology and grammar with Unicode CLDR locale/plural data, Microsoft Localization Style Guides and terminology, Apple localization/style guidance and localized platform UI, Mozilla localization style guides, Mozilla Pontoon, and the Firefox localization corpus at `github.com/mozilla-l10n/firefox-l10n`.
+- For developer-facing terminology, prefer the words already used by the target language's developer community over literal dictionary translations. Cross-check maintained localized developer products such as Firefox, KDE, and VS Code; use at least two independent corpora when they are available. If established practice keeps an English loanword or acronym, keep it rather than inventing a translation.
+- Translate complete UI phrases in context. A glossary hit is evidence, not permission to translate word-by-word. Check terse labels such as session, prompt, agent, model, fork, shell, terminal, workspace, and worktree in the same grammatical role before choosing a term.
+- Before a locale is ready, audit recurring concepts for one consistent translation and review every value that still equals English. Classify retained English as a product name, provider/tool name, URL, code token, keyboard legend, acronym, asset name, or established borrowing; translate unexplained leftovers.
+- In translation review notes, name the corpora used and call out uncertain or region-specific terminology so native speakers can focus review where it matters.
+- Also use the relevant language authority or official dictionary for the locale (for example RAE/Fundéu, FranceTerme, Duden, TDK, Kotus/Kielitoimiston sanakirja, Språkrådet/Bokmålsordboka, Rada Języka Polskiego/PWN, the Russian and Arabic language academies, the Ukrainian Orthography, Taiwan MOE dictionaries, or the Royal Society of Thailand). Treat the English dictionary as the semantic source of truth and preserve placeholders, code identifiers, product names, and keyboard labels.
+
 ## Tool Calling
 
 - ALWAYS USE PARALLEL TOOLS WHEN APPLICABLE.

packages/app/V1_API_MIGRATION.md

@@ -0,0 +1,220 @@
+# V1 API Migration Checklist
+
+The app is currently hybrid. In this document, V1 refers to the legacy unprefixed server APIs used by `@opencode-ai/sdk/v2`, despite the SDK package name.
+
+## Events
+
+- [x] Replace `GET /global/event` with `GET /api/event`.
+  - `src/context/server-sdk.tsx`
+- [x] Reduce current granular session and message events into the existing app projections.
+  - `src/context/server-session-v2-reducer.ts`
+  - `src/context/server-session.ts`
+- [ ] Remove transitional session event dependencies: `session.created`, `session.updated`, `session.diff`, `session.status`, `session.idle`, and `session.error`.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/context/server-session.ts`
+  - `src/context/notification.tsx`
+  - `src/pages/session/usage-exceeded-dialogs.tsx`
+- [ ] Remove legacy message event compatibility: `message.updated`, `message.removed`, `message.part.updated`, `message.part.removed`, and `message.part.delta`.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/context/server-session.ts`
+- [x] Adapt current permission and question events to the existing request model.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/context/permission.tsx`
+- [x] Consume current file watcher events.
+  - `src/context/file.tsx`
+- [x] Consume current VCS events.
+  - `src/context/global-sync/event-reducer.ts`
+  - `src/pages/session.tsx`
+- [x] Consume current `pty.exited` events.
+  - `src/context/terminal.tsx`
+- [ ] Migrate LSP and reference events.
+  - `src/context/global-sync/event-reducer.ts`
+
+## Sessions
+
+- [x] Replace `GET /session/status` with one server-scoped `GET /api/session/active` snapshot plus V2 execution events.
+  - `src/context/server-sync.tsx`
+- [x] Migrate session listing from `GET /session`.
+  - `src/context/server-sync.tsx`
+  - `src/context/directory-sync.ts`
+  - `src/pages/layout.tsx`
+- [x] Migrate the remaining direct session read from `GET /session/:sessionID`.
+  - `src/components/titlebar.tsx`
+- [x] Migrate session updates from `PATCH /session/:sessionID`.
+  - `src/context/directory-sync.ts`
+  - `src/context/layout.tsx`
+  - `src/pages/home.tsx`
+  - `src/pages/layout.tsx`
+  - `src/pages/session/timeline/message-timeline.tsx`
+  - `src/components/titlebar-tab-nav.tsx`
+  - Renames use `POST /api/session/:sessionID/rename`; archival uses `POST /api/session/:sessionID/archive`.
+- [x] Migrate session deletion from `DELETE /session/:sessionID`.
+  - `src/pages/session/timeline/message-timeline.tsx`
+- [x] Remove session diff loading from `GET /session/:sessionID/diff`.
+  - Historical Session diffs remain unavailable until the current API defines their snapshot semantics.
+- [x] Migrate abort from `POST /session/:sessionID/abort`.
+  - `src/components/prompt-input/submit.ts`
+  - `src/pages/session/use-session-commands.tsx`
+  - `src/pages/session.tsx`
+- [x] Migrate revert and unrevert from `POST /session/:sessionID/revert` and `POST /session/:sessionID/unrevert`.
+  - `src/pages/session/use-session-commands.tsx`
+  - `src/pages/session.tsx`
+- [x] Replace `POST /session/:sessionID/summarize` with the current compact API.
+  - `src/pages/session/use-session-commands.tsx`
+- [x] Migrate slash commands from `POST /session/:sessionID/command`.
+  - `src/components/prompt-input/submit.ts`
+- [x] Migrate shell execution from `POST /session/:sessionID/shell`.
+  - `src/components/prompt-input/submit.ts`
+- [x] Migrate session fork from `POST /session/:sessionID/fork`.
+  - `src/components/dialog-fork.tsx`
+- [ ] Migrate sharing from `POST /session/:sessionID/share` and `DELETE /session/:sessionID/share`.
+  - `src/pages/session/use-session-commands.tsx`
+  - `src/pages/session/timeline/message-timeline.tsx`
+  - Blocked: the current API has no sharing contract or implementation.
+
+## Session Compatibility Fallbacks
+
+These calls are retained as fallback adapters. The current production path supplies the current session and message APIs.
+
+- [ ] Remove fallback `GET /session/:sessionID` after compatibility support is unnecessary.
+  - `src/context/server-session.ts`
+- [ ] Remove fallback `GET /session/:sessionID/message` after compatibility support is unnecessary.
+  - `src/context/server-session.ts`
+- [ ] Remove fallback `GET /session/:sessionID/message/:messageID` after compatibility support is unnecessary.
+  - `src/context/server-session.ts`
+
+## Filesystem
+
+- [ ] Migrate file listing from `GET /file`.
+  - `src/context/file.tsx`
+- [ ] Migrate file reads from `GET /file/content`.
+  - `src/context/file.tsx`
+  - `src/pages/session/review-tab.tsx`
+  - `src/pages/session/v2/review-panel-v2.tsx`
+- [x] Migrate path discovery from `GET /path` to `GET /api/path`.
+  - `src/context/global-sync/bootstrap.ts`
+  - `src/components/dialog-select-directory.tsx`
+  - `src/components/dialog-select-directory-v2.tsx`
+
+## Projects And Worktrees
+
+- [x] Migrate project listing from `GET /project` to `GET /api/project`.
+  - `src/context/global-sync/bootstrap.ts`
+- [x] Migrate the current project lookup from `GET /project/current` to `GET /api/project/current`.
+  - `src/context/global-sync/bootstrap.ts`
+- [ ] Migrate Git initialization from `POST /project/git/init`.
+  - `src/pages/session.tsx`
+- [x] Migrate project updates from `PATCH /project/:projectID` to `PATCH /api/project/:projectID`.
+  - `src/context/layout.tsx`
+  - `src/components/edit-project.ts`
+  - `src/pages/layout.tsx`
+- [ ] Migrate experimental worktree listing, creation, removal, and reset from `/experimental/worktree`.
+  - `src/pages/layout.tsx`
+  - `src/components/prompt-input/submit.ts`
+  - Listing now uses `GET /api/project/:projectID/directories`; create, removal, and reset remain.
+- [ ] Migrate instance disposal from `POST /instance/dispose`.
+  - `src/pages/layout.tsx`
+
+## VCS
+
+- [x] Migrate repository information from `GET /vcs` to `GET /api/vcs`.
+  - `src/context/global-sync/bootstrap.ts`
+- [x] Migrate diffs from `GET /vcs/diff` to `GET /api/vcs/diff`.
+  - `src/pages/session.tsx`
+- [x] Migrate status from `GET /vcs/status` to `GET /api/vcs/status`.
+  - `src/pages/layout.tsx`
+
+## Configuration And Authentication
+
+- [ ] Migrate global configuration reads from `GET /global/config`.
+  - `src/context/global-sync/bootstrap.ts`
+- [ ] Migrate directory configuration reads from `GET /config`.
+  - `src/context/global-sync/bootstrap.ts`
+- [ ] Migrate global configuration updates from `PATCH /global/config`.
+  - `src/context/server-sync.tsx`
+- [x] Migrate provider authentication method discovery from `GET /provider/auth` to `GET /api/integration/:integrationID`.
+  - `src/components/dialog-connect-provider.tsx`
+- [x] Migrate built-in provider OAuth authorization and callbacks to `/api/integration/:integrationID/connect/oauth/*`.
+  - `src/components/dialog-connect-provider.tsx`
+- [ ] Migrate remaining credentials from `PUT /auth/:providerID` and `DELETE /auth/:providerID`.
+  - Built-in provider key connections now use `POST /api/integration/:integrationID/connect/key`.
+  - `src/components/dialog-connect-provider.tsx`
+  - `src/components/dialog-custom-provider.tsx`
+  - `src/components/settings-providers.tsx`
+  - `src/components/settings-v2/providers.tsx`
+- [ ] Migrate global disposal from `POST /global/dispose`.
+  - `src/components/dialog-connect-provider.tsx`
+  - `src/components/settings-providers.tsx`
+  - `src/components/settings-v2/providers.tsx`
+
+## Permissions And Questions
+
+- [x] Migrate permission listing from `GET /permission` to `GET /api/permission/request`.
+  - `src/context/global-sync/bootstrap.ts`
+  - `src/context/permission.tsx`
+- [x] Migrate permission responses from `/session/:sessionID/permissions/:permissionID`.
+  - `src/context/permission.tsx`
+  - `src/pages/session/composer/session-composer-state.ts`
+- [x] Migrate question listing from `GET /question` to `GET /api/question/request`.
+  - `src/context/global-sync/bootstrap.ts`
+- [x] Migrate question replies and rejections from `/question/:requestID/*` to `/api/session/:sessionID/question/:requestID/*`.
+  - `src/pages/session/composer/session-question-dock.tsx`
+
+## Commands, MCP, LSP, And References
+
+- [x] Migrate command listing from `GET /command` to `GET /api/command`.
+  - `src/context/global-sync/bootstrap.ts`
+  - `src/context/server-sync.tsx`
+- [x] Migrate MCP listing, connection, and disconnection from `/mcp` to `/api/mcp`.
+  - `src/context/server-sync.tsx`
+- [ ] Replace legacy MCP authentication with the Integration OAuth workflow.
+  - `src/context/server-sync.tsx`
+- [x] Migrate experimental resource listing from `GET /experimental/resource` to `GET /api/mcp/resource`.
+  - `src/context/server-sync.tsx`
+- [ ] Migrate LSP status from `GET /lsp`.
+  - `src/context/server-sync.tsx`
+- [x] Move `GET /api/reference` off the legacy generated SDK transport.
+  - `src/context/global-sync/bootstrap.ts`
+
+## Search
+
+- [x] Migrate global session search from `GET /experimental/session` to `GET /api/session`.
+  - `src/components/command-palette.ts`
+  - `src/components/dialog-command-palette-v2.tsx`
+
+## PTY And Terminal
+
+- [x] Migrate PTY creation, reads, updates, and deletion from `/pty` to `/api/pty`.
+  - `src/context/terminal.tsx`
+  - `src/components/terminal.tsx`
+- [x] Migrate shell listing from `GET /pty/shells` to `GET /api/pty/shells`.
+  - `src/components/settings-general.tsx`
+  - `src/components/settings-v2/general.tsx`
+- [x] Migrate connection tokens from `POST /pty/:ptyID/connect-token` to `POST /api/pty/:ptyID/connect-token`.
+  - `src/components/terminal.tsx`
+- [x] Migrate the direct WebSocket connection from `/pty/:ptyID/connect` to `/api/pty/:ptyID/connect`.
+  - `src/components/terminal.tsx`
+
+## Legacy Types And Adapters
+
+These are not V1 network requests, but they keep the UI coupled to V1 data contracts.
+
+- [ ] Replace the current-session-to-legacy-session adapter.
+  - `src/utils/session.ts`
+- [ ] Replace the current-message-to-legacy-message-and-part adapter.
+  - `src/utils/session-message.ts`
+- [ ] Replace current agent, provider, and model adapters to legacy SDK structures.
+  - `src/context/global-sync/utils.ts`
+- [ ] Replace legacy `Session`, `Message`, `Part`, `PermissionRequest`, `QuestionRequest`, `Project`, `FileNode`, `FileDiffInfo`, and `Event` types throughout app state and rendering.
+- [ ] Remove the `@opencode-ai/sdk` runtime dependency after all legacy calls and types are gone.
+  - `package.json`
+
+## Test Infrastructure
+
+- [ ] Replace V1 endpoint mocks with current API mocks.
+  - `e2e/utils/mock-server.ts`
+- [x] Replace `/global/event` and `/event` interception with current event transport handling.
+  - `e2e/utils/sse-transport.ts`
+- [ ] Replace `SessionV1` and legacy SDK fixtures in timeline performance tests.
+  - `e2e/performance/timeline-stability/fixture.ts`
+- [ ] Remove remaining legacy SDK type fixtures from unit and browser tests.

packages/app/e2e/AGENTS.md

@@ -0,0 +1,16 @@
+## Required Reading
+
+- Before writing, changing, or reviewing E2E tests, ALWAYS read and follow Playwright's official [Best Practices](https://playwright.dev/docs/best-practices), [Auto-waiting](https://playwright.dev/docs/actionability), and [Assertions](https://playwright.dev/docs/test-assertions) guides.
+- Use the official [Locators](https://playwright.dev/docs/locators), [Network](https://playwright.dev/docs/network), and [Test Isolation](https://playwright.dev/docs/browser-contexts) guides when those concerns apply.
+
+## Test Hygiene
+
+- Test user-visible behavior with isolated, deterministic data and scoped, unique locators.
+- Prefer role, label, text, and explicit test-contract locators. Do not use `.first()` or `.last()` merely to silence strictness errors.
+- Use locator actions, Playwright auto-waiting, and web-first assertions for observable readiness and outcomes.
+- NEVER use `waitForTimeout`, `setTimeout`, sleeps, animation-frame counts, or other wall-clock delays to synchronize a test. Wait for the specific UI state, request, response, event, or application outcome instead.
+- Do not treat navigation, a network response, DOM attachment, or visibility alone as proof that asynchronously rendered UI is ready. Assert the state the next action actually requires.
+- Register event and network waits before the action that triggers them.
+- Do not retry state-changing actions. Retry idempotent readiness checks, then perform the action once and assert its outcome.
+- Keep action and assertion timeouts adaptive. Do not use short timeouts as readiness probes or rely on retries to hide flakes.
+- Assert exact outcomes and identities so stale state, duplicate rendering, and interactions with the wrong element cannot pass.

packages/app/e2e/performance/timeline-stability/README.md

@@ -0,0 +1,61 @@
+# Timeline Layout Continuity
+
+Run from `packages/app`:
+
+```sh
+bun run test:stability
+```
+
+The suite runs a production build in one Chromium worker. Selected scenarios use deterministic 4x CPU stress after application readiness. This is a stress profile, not emulation of a specific device.
+
+## What It Proves
+
+The continuity probe samples DOM-derived layout and visibility state across browser render opportunities. Tests declare explicit contracts such as:
+
+- Preserve a visible semantic anchor while the user is away from the bottom.
+- Preserve end anchoring while active content grows or new content appears.
+- Keep adjacent visible rows ordered without material overlap.
+- Keep user-selected disclosure state through updates and virtualization.
+- Avoid a sampled blank interval while one visible surface replaces another.
+- Preserve logical row and control identity where local state or focus depends on it.
+- Keep keyboard, wheel, and nested-scroll ownership consistent during remeasurement.
+
+The suite exercises real browser reducer, projection, component, virtualizer, layout, focus, and interaction code. The backend and event producer are controlled fixtures.
+
+## What It Does Not Prove
+
+The pass/fail oracle does not inspect every compositor-presented pixel. A sample taken after `requestAnimationFrame` is a DOM/layout observation, not proof that every sampled state was displayed or that every displayed frame was sampled.
+
+The suite does not provide complete coverage for:
+
+- Compositor-only or raster-only glitches.
+- Color, contrast, canvas, WebGL, masks, irregular clips, or arbitrary occlusion.
+- Physical display refresh rates, native OS scaling, or a named low-end device.
+- TCP packetization, proxy buffering, or the complete real server/provider pipeline.
+
+Playwright video, trace, screenshots, and observation JSON are diagnostic evidence. They are not pixel baselines and do not participate in normal pass/fail decisions.
+
+For optional before/violation/after screenshots, set `OPENCODE_STABILITY_CAPTURE=1`. Capture is opt-in because compositor readback can perturb timing.
+
+## Test Layers
+
+- **Projection:** admitted rows, grouping, labels, and final visible states.
+- **Local state:** disclosure state, identity, duplicate delivery, and virtualization restoration.
+- **Interaction:** wheel, keyboard, nested scrolling, actionability, and focus behavior.
+- **Layout continuity:** anchoring, adjacency, responsive reflow, and visible surface handoffs.
+- **Reducer hardening:** validly shaped but intentionally reordered, duplicated, removed, or replaced events.
+- **Oracle contract:** pure analyzer and browser sampler calibration tests.
+
+Production-lifecycle fixtures should model states emitted by the current producer. Impossible or reordered sequences belong in reducer-hardening tests and must not be described as normal provider behavior.
+
+## Diagnostics
+
+Failures retain:
+
+- `video.webm`
+- `trace.zip`
+- failure screenshot
+- sampled DOM/layout trace JSON
+- event markers and summarized violations
+
+The analyzer records both unclipped layout bounds and ancestor-clipped visible intersections. Scrollbar and raw `scrollTop` changes alone do not fail continuity checks; user-visible semantic anchor movement does.

packages/app/e2e/performance/timeline-stability/adverse.spec.ts

@@ -0,0 +1,250 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  partUpdated,
+  setupTimeline,
+  shell,
+  textPart,
+  toolPart,
+  userMessage,
+  waitForVisualSettle,
+  type TimelineMessage,
+} from "./fixture"
+
+test.describe("timeline adverse visual stability", () => {
+  test("does not pull a scrolled-away user while an active shell grows", async ({ page }, testInfo) => {
+    const activeShellID = "prt_adverse_01_shell"
+    const messages = [
+      ...history(24),
+      userMessage(),
+      assistantMessage([shell(activeShellID, "running")], { completed: false }),
+    ]
+    const timeline = await setupTimeline(page, {
+      messages,
+      settings: { shellToolPartsExpanded: true },
+      cpuRate: 4,
+      eventRetry: 30,
+    })
+    const scroller = page.locator(".scroll-view__viewport", {
+      has: page.locator('[data-timeline-row="AssistantPart"]'),
+    })
+    await scroller.evaluate((element) => {
+      element.dispatchEvent(new WheelEvent("wheel", { bubbles: true, cancelable: true, deltaY: -450 }))
+      element.scrollTop = Math.max(0, element.scrollHeight - element.clientHeight - 450)
+    })
+    await page.waitForTimeout(150)
+    await expect
+      .poll(() => scroller.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop))
+      .toBeGreaterThan(100)
+    const anchor = await scroller.evaluate((element) => {
+      const view = element.getBoundingClientRect()
+      return [...element.querySelectorAll<HTMLElement>("[data-timeline-key]")].find((row) => {
+        const rect = row.getBoundingClientRect()
+        return rect.top >= view.top + 40 && rect.bottom <= view.bottom - 40
+      })?.dataset.timelineKey
+    })
+    expect(anchor).toBeTruthy()
+    await waitForVisualSettle(page, [`[data-timeline-key="${anchor}"]`])
+
+    const regions = defineVisualRegions({
+      anchor: { selector: `[data-timeline-key="${anchor}"]` },
+    })
+    await startVisualProbe(page, regions)
+    await timeline.send(partUpdated(shell(activeShellID, "running", lines(1))), 180)
+    await timeline.send(partUpdated(shell(activeShellID, "running", lines(10))), 90)
+    await timeline.send(partUpdated(shell(activeShellID, "running", lines(50))), 350)
+    await timeline.send(partUpdated(shell(activeShellID, "completed", lines(50))), 500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      "scrolled-away-shell",
+      trace,
+      visualPlan(regions, [
+        { type: "required", regions: ["anchor"] },
+        { type: "unique", regions: ["anchor"] },
+        { type: "stable", regions: ["anchor"] },
+        { type: "fixed", regions: ["anchor"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+      ]),
+    )
+  })
+
+  test("preserves an explicit shell state across virtualization", async ({ page }) => {
+    const targetID = "prt_virtual_shell"
+    const messages = [
+      userMessage(undefined, { id: "msg_0000_virtual_user", created: 1700000000000 }),
+      assistantMessage([shell(targetID, "completed", lines(20))], {
+        id: "msg_0001_virtual_assistant",
+        parentID: "msg_0000_virtual_user",
+        created: 1700000001000,
+      }),
+      ...history(35, 10),
+    ]
+    await setupTimeline(page, { messages, settings: { shellToolPartsExpanded: false } })
+    const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+    await scroller.evaluate((element) => {
+      element.dispatchEvent(new WheelEvent("wheel", { bubbles: true, cancelable: true, deltaY: -1_000 }))
+      element.scrollTop = 0
+    })
+    await page.waitForTimeout(300)
+    const trigger = page.locator(`[data-timeline-part-id="${targetID}"] [data-slot="collapsible-trigger"]`)
+    await expect(trigger).toBeVisible()
+    await trigger.click()
+    await expect(trigger).toHaveAttribute("aria-expanded", "true")
+
+    await scroller.evaluate((element) => (element.scrollTop = element.scrollHeight))
+    await expect(page.locator(`[data-timeline-part-id="${targetID}"]`)).toHaveCount(0)
+    await scroller.evaluate((element) => (element.scrollTop = 0))
+    await expect(trigger).toBeVisible()
+    await expect(trigger).toHaveAttribute("aria-expanded", "true")
+  })
+
+  test("keeps narrow viewport rows ordered during long shell growth", async ({ page }, testInfo) => {
+    const shellID = "prt_narrow_01_shell"
+    const followingID = "prt_narrow_02_following"
+    const timeline = await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage(
+          [shell(shellID, "running"), textPart(followingID, "A narrow following row that wraps across lines.")],
+          {
+            completed: false,
+          },
+        ),
+      ],
+      settings: { shellToolPartsExpanded: true },
+      viewport: { width: 430, height: 800 },
+      cpuRate: 4,
+    })
+    await waitForVisualSettle(page, [
+      `[data-timeline-part-id="${shellID}"]`,
+      `[data-timeline-part-id="${followingID}"]`,
+    ])
+    const regions = defineVisualRegions({
+      shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: `[data-timeline-part-id="${followingID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    await timeline.send(partUpdated(shell(shellID, "running", wideLines(10))), 100)
+    await timeline.send(partUpdated(shell(shellID, "running", wideLines(50))), 300)
+    await timeline.send(partUpdated(shell(shellID, "completed", wideLines(50))), 500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      "narrow-shell",
+      trace,
+      visualPlan(
+        regions,
+        [
+          { type: "required", regions: ["shell", "following"] },
+          { type: "unique", regions: ["shell", "following"] },
+          { type: "stable", regions: ["shell", "following"] },
+          { type: "opacity", regions: "all" },
+          { type: "continuity", regions: "all" },
+          { type: "motion", regions: "all", maxPositionReversals: 0 },
+          { type: "label-stability", regions: "all" },
+          { type: "preserve-bottom-anchor" },
+          { type: "flow", regions: ["shell", "following"] },
+        ],
+        { perMarker: true },
+      ),
+    )
+  })
+
+  test("keeps visible rows ordered while resizing desktop to narrow and back", async ({ page }, testInfo) => {
+    const shellID = "prt_resize_01_shell"
+    const contextIDs = ["prt_resize_02_read", "prt_resize_03_glob"]
+    const followingID = "prt_resize_04_following"
+    await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage([
+          shell(shellID, "completed", wideLines(15)),
+          toolPart(contextIDs[0]!, "read", "completed", { filePath: "src/a.ts" }),
+          toolPart(contextIDs[1]!, "glob", "completed", { path: ".", pattern: "**/*.ts" }),
+          textPart(followingID, "Following responsive timeline content that wraps on narrow screens."),
+        ]),
+      ],
+      settings: { shellToolPartsExpanded: true },
+      cpuRate: 4,
+      seedHistory: true,
+    })
+    const group = `[data-timeline-part-ids="${contextIDs.join(",")}"]`
+    const regions = defineVisualRegions({
+      shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+      context: { selector: group, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: `[data-timeline-part-id="${followingID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    await page.setViewportSize({ width: 430, height: 800 })
+    await page.waitForTimeout(500)
+    await page.setViewportSize({ width: 900, height: 800 })
+    await page.waitForTimeout(500)
+    await page.setViewportSize({ width: 1400, height: 900 })
+    await page.waitForTimeout(500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      "responsive-resize",
+      trace,
+      visualPlan(regions, [
+        { type: "required", regions: ["shell", "context", "following"] },
+        { type: "unique", regions: ["shell", "context", "following"] },
+        { type: "stable", regions: ["shell", "context", "following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 4, maxReversals: 4 },
+        { type: "label-stability", regions: "all" },
+        { type: "flow", regions: ["shell", "context", "following"] },
+      ]),
+    )
+  })
+})
+
+function history(count: number, offset = 0): TimelineMessage[] {
+  return Array.from({ length: count }, (_, index) => {
+    const value = index + offset
+    const prefix = `msg_0${String(value).padStart(3, "0")}_history`
+    const userID = `${prefix}_a_user`
+    return [
+      userMessage(undefined, { id: userID, created: 1699990000000 + value * 10_000 }),
+      assistantMessage(
+        [
+          textPart(
+            `prt_history_${String(value).padStart(3, "0")}`,
+            `Historical response ${value}. ${"Stable history content. ".repeat(8)}`,
+          ),
+        ],
+        {
+          id: `${prefix}_b_assistant`,
+          parentID: userID,
+          created: 1699990001000 + value * 10_000,
+        },
+      ),
+    ]
+  }).flat()
+}
+
+function lines(count: number) {
+  return Array.from({ length: count }, (_, index) => `line ${index + 1}`).join("\n")
+}
+
+function wideLines(count: number) {
+  return Array.from({ length: count }, (_, index) => `line ${index + 1} ${"wide-output-".repeat(20)}`).join("\n")
+}

packages/app/e2e/performance/timeline-stability/context-matrix.spec.ts

@@ -0,0 +1,192 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantID,
+  assistantMessage,
+  event,
+  partUpdated,
+  setupTimeline,
+  textPart,
+  toolPart,
+  userMessage,
+  waitForVisualSettle,
+} from "./fixture"
+
+const inputs = {
+  read: { filePath: "src/a.ts", offset: 0, limit: 120 },
+  glob: { path: ".", pattern: "**/*.ts" },
+  grep: { path: ".", pattern: "stable", include: "*.ts" },
+  list: { path: "src" },
+}
+
+test("appends context operations while the group is expanded", async ({ page }, testInfo) => {
+  const firstID = "prt_append_01_read"
+  const followingID = "prt_append_99_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([toolPart(firstID, "read", "running", inputs.read), textPart(followingID, "Following append")], {
+        completed: false,
+      }),
+    ],
+    cpuRate: 4,
+  })
+  const initialGroup = `[data-timeline-part-ids="${firstID}"]`
+  await page.locator(`${initialGroup} [data-slot="collapsible-trigger"]`).click()
+  await waitForVisualSettle(page, [initialGroup, `[data-timeline-part-id="${followingID}"]`])
+  const regions = defineVisualRegions({
+    context: {
+      selector: '[data-timeline-part-ids^="prt_append_01_read"]',
+      closest: '[data-timeline-row="AssistantPart"]',
+    },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partUpdated(toolPart("prt_append_02_glob", "glob", "running", inputs.glob)), 180)
+  await timeline.send(partUpdated(toolPart("prt_append_03_grep", "grep", "completed", inputs.grep)), 240)
+  await timeline.send(partUpdated(toolPart("prt_append_04_list", "list", "completed", inputs.list)), 500)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "context-append",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["context", "following"] },
+        { type: "unique", regions: ["context", "following"] },
+        { type: "stable", regions: ["context", "following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: ["following"], maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+        { type: "preserve-bottom-anchor" },
+        { type: "flow", regions: ["context", "following"] },
+      ],
+      { perMarker: true },
+    ),
+  )
+  await expect(
+    page.locator(
+      '[data-timeline-part-ids="prt_append_01_read,prt_append_02_glob,prt_append_03_grep,prt_append_04_list"]',
+    ),
+  ).toBeVisible()
+  await expect(
+    page.locator('[data-timeline-part-ids^="prt_append_01_read"] [data-slot="collapsible-trigger"]'),
+  ).toHaveAttribute("aria-expanded", "true")
+})
+
+test("splits and merges context groups when a middle text part changes", async ({ page }, testInfo) => {
+  const textID = "prt_split_02_text"
+  const followingID = "prt_split_99_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([
+        toolPart("prt_split_01_read", "read", "completed", inputs.read),
+        textPart(textID, "Boundary"),
+        toolPart("prt_split_03_glob", "glob", "completed", inputs.glob),
+        textPart(followingID, "Following split groups"),
+      ]),
+    ],
+    cpuRate: 4,
+  })
+  const regions = defineVisualRegions({
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    event("message.part.removed", { sessionID: "ses_timeline_stability", messageID: assistantID, partID: textID }),
+    500,
+  )
+  await expect(page.locator('[data-timeline-part-ids="prt_split_01_read,prt_split_03_glob"]')).toBeVisible()
+  await timeline.send(partUpdated(textPart(textID, "Boundary restored")), 500)
+  await expect(page.locator('[data-timeline-part-ids="prt_split_01_read"]')).toBeVisible()
+  await expect(page.locator('[data-timeline-part-ids="prt_split_03_glob"]')).toBeVisible()
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "context-split-merge",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["following"] },
+        { type: "unique", regions: ["following"] },
+        { type: "stable", regions: ["following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 1 },
+        { type: "label-stability", regions: "all" },
+      ],
+      { perMarker: true },
+    ),
+  )
+})
+
+test("removing the first context member replaces the group once without overlapping following content", async ({
+  page,
+}, testInfo) => {
+  const ids = ["prt_key_01_read", "prt_key_02_glob", "prt_key_03_grep"]
+  const followingID = "prt_key_99_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([
+        toolPart(ids[0]!, "read", "completed", inputs.read),
+        toolPart(ids[1]!, "glob", "completed", inputs.glob),
+        toolPart(ids[2]!, "grep", "completed", inputs.grep),
+        textPart(followingID, "Following replaced group"),
+      ]),
+    ],
+    cpuRate: 4,
+  })
+  const original = page.locator(`[data-timeline-part-ids="${ids.join(",")}"]`)
+  const originalRowKey = await original.evaluate((element) =>
+    element.closest("[data-timeline-key]")?.getAttribute("data-timeline-key"),
+  )
+  await original.locator('[data-slot="collapsible-trigger"]').click()
+  await expect(original.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "true")
+  const regions = defineVisualRegions({
+    context: {
+      selector: '[data-timeline-part-ids*="prt_key_02_glob"]',
+      closest: '[data-timeline-row="AssistantPart"]',
+    },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    event("message.part.removed", { sessionID: "ses_timeline_stability", messageID: assistantID, partID: ids[0] }),
+    500,
+  )
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "context-first-remove",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["context", "following"] },
+      { type: "unique", regions: ["context", "following"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 0 },
+      { type: "label-stability", regions: "all" },
+      { type: "flow", regions: ["context", "following"] },
+    ]),
+  )
+  await expect(page.locator(`[data-timeline-part-ids="${ids.slice(1).join(",")}"]`)).toBeVisible()
+  expect(
+    await page
+      .locator(`[data-timeline-part-ids="${ids.slice(1).join(",")}"]`)
+      .evaluate((element) => element.closest("[data-timeline-key]")?.getAttribute("data-timeline-key")),
+  ).toBe(originalRowKey)
+  await expect(
+    page.locator(`[data-timeline-part-ids="${ids.slice(1).join(",")}"] [data-slot="collapsible-trigger"]`),
+  ).toHaveAttribute("aria-expanded", "true")
+})

packages/app/e2e/performance/timeline-stability/environment-matrix.spec.ts

@@ -0,0 +1,113 @@
+import { test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  partUpdated,
+  setupTimeline,
+  shell,
+  textPart,
+  userMessage,
+  waitForVisualSettle,
+} from "./fixture"
+
+// Fractional scaling exercises different browser rounding than the baseline.
+for (const deviceScaleFactor of [1, 1.25]) {
+  test(`keeps shell growth ordered at device scale ${deviceScaleFactor}`, async ({ page }, testInfo) => {
+    const shellID = `prt_dpr_${String(deviceScaleFactor).replace(".", "_")}_01_shell`
+    const followingID = `prt_dpr_${String(deviceScaleFactor).replace(".", "_")}_02_following`
+    const timeline = await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage([shell(shellID, "running"), textPart(followingID, "Following scaled shell")], {
+          completed: false,
+        }),
+      ],
+      settings: { shellToolPartsExpanded: true },
+      cpuRate: 4,
+      deviceScaleFactor,
+      seedHistory: true,
+    })
+    await waitForVisualSettle(page, [
+      `[data-timeline-part-id="${shellID}"]`,
+      `[data-timeline-part-id="${followingID}"]`,
+    ])
+    const regions = defineVisualRegions({
+      shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: `[data-timeline-part-id="${followingID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    await timeline.send(partUpdated(shell(shellID, "running", lines(20))), 180)
+    await timeline.send(partUpdated(shell(shellID, "completed", lines(20))), 500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(testInfo, `dpr-${deviceScaleFactor}`, trace, shellPlan(regions))
+  })
+}
+
+for (const reducedMotion of [true]) {
+  test(`keeps shell and status transitions ordered with reduced motion ${reducedMotion}`, async ({
+    page,
+  }, testInfo) => {
+    const shellID = `prt_motion_${reducedMotion}_01_shell`
+    const followingID = `prt_motion_${reducedMotion}_02_following`
+    const timeline = await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage([shell(shellID, "running"), textPart(followingID, "Following motion profile")], {
+          completed: false,
+        }),
+      ],
+      settings: { shellToolPartsExpanded: true },
+      reducedMotion,
+      cpuRate: 4,
+      seedHistory: true,
+    })
+    await waitForVisualSettle(page, [
+      `[data-timeline-part-id="${shellID}"]`,
+      `[data-timeline-part-id="${followingID}"]`,
+    ])
+    const regions = defineVisualRegions({
+      shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: `[data-timeline-part-id="${followingID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    await timeline.send(partUpdated(shell(shellID, "completed", lines(10))), 500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(testInfo, `reduced-motion-${reducedMotion}`, trace, shellPlan(regions))
+  })
+}
+
+function lines(count: number) {
+  return Array.from({ length: count }, (_, index) => `line ${index + 1}`).join("\n")
+}
+
+function shellPlan<Regions extends ReturnType<typeof defineVisualRegions>>(
+  regions: Regions & Record<"shell" | "following", { selector: string }>,
+) {
+  return visualPlan(
+    regions,
+    [
+      { type: "required", regions: ["shell", "following"] },
+      { type: "unique", regions: ["shell", "following"] },
+      { type: "stable", regions: ["shell", "following"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 0 },
+      { type: "label-stability", regions: "all" },
+      { type: "preserve-bottom-anchor" },
+      { type: "flow", regions: ["shell", "following"] },
+    ],
+    { perMarker: true },
+  )
+}

packages/app/e2e/performance/timeline-stability/file-matrix.spec.ts

@@ -0,0 +1,121 @@
+import { test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  partUpdated,
+  setupTimeline,
+  textPart,
+  toolPart,
+  userMessage,
+  waitForVisualSettle,
+} from "./fixture"
+
+const profiles = [
+  { name: "edit", tool: "edit", input: { filePath: "src/edit.ts" } },
+  {
+    name: "multi patch",
+    tool: "apply_patch",
+    input: { files: ["src/a.ts", "src/b.ts", "src/old.ts", "src/moved.ts"] },
+  },
+] as const
+
+for (const profile of profiles) {
+  test(`stabilizes ${profile.name} pending to completed`, async ({ page }, testInfo) => {
+    const partID = `prt_file_matrix_${profiles.indexOf(profile)}`
+    const followingID = `prt_file_matrix_following_${profiles.indexOf(profile)}`
+    const timeline = await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage(
+          [
+            toolPart(partID, profile.tool, "pending", profile.input),
+            textPart(followingID, `Following ${profile.name}`),
+          ],
+          { completed: false },
+        ),
+      ],
+      settings: { editToolPartsExpanded: true },
+      cpuRate: 4,
+    })
+    await waitForVisualSettle(page, [`[data-timeline-part-id="${partID}"]`, `[data-timeline-part-id="${followingID}"]`])
+    const regions = defineVisualRegions({
+      tool: { selector: `[data-timeline-part-id="${partID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: `[data-timeline-part-id="${followingID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    await timeline.send(partUpdated(toolPart(partID, profile.tool, "running", profile.input)), 180)
+    await timeline.send(partUpdated(completedPart(partID, profile)), 900)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      `file-${profile.name}`,
+      trace,
+      visualPlan(
+        regions,
+        [
+          { type: "required", regions: ["tool", "following"] },
+          { type: "unique", regions: ["tool", "following"] },
+          { type: "stable", regions: ["tool", "following"] },
+          { type: "opacity", regions: "all" },
+          { type: "continuity", regions: "all" },
+          { type: "motion", regions: "all", maxPositionReversals: 0, maxReversals: 1 },
+          { type: "label-stability", regions: "all" },
+          { type: "preserve-bottom-anchor" },
+          { type: "flow", regions: ["tool", "following"] },
+        ],
+        { perMarker: true },
+      ),
+    )
+  })
+}
+
+function completedPart(partID: string, profile: (typeof profiles)[number]) {
+  if (profile.tool === "edit") {
+    return toolPart(partID, profile.tool, "completed", profile.input, {
+      metadata: {
+        filediff: {
+          file: "src/edit.ts",
+          additions: 50,
+          deletions: 50,
+          before: source(50, false),
+          after: source(50, true),
+        },
+      },
+    })
+  }
+  const files = [
+    patchFile("src/a.ts", "update"),
+    patchFile("src/b.ts", "add"),
+    patchFile("src/old.ts", "delete"),
+    { ...patchFile("src/moved.ts", "move"), move: "src/new-place.ts" },
+  ]
+  return toolPart(partID, profile.tool, "completed", profile.input, { metadata: { files } })
+}
+
+function patchFile(filePath: string, type: "add" | "update" | "delete" | "move") {
+  return {
+    filePath,
+    relativePath: filePath,
+    type,
+    additions: type === "delete" ? 0 : 20,
+    deletions: type === "add" ? 0 : 20,
+    before: type === "add" ? undefined : source(20, false),
+    after: type === "delete" ? undefined : source(20, true),
+  }
+}
+
+function source(count: number, changed: boolean) {
+  return Array.from(
+    { length: count },
+    (_, index) => `export const value${index} = ${changed ? index + 1 : index}\n`,
+  ).join("")
+}

packages/app/e2e/performance/timeline-stability/file-mutation.spec.ts

@@ -0,0 +1,113 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  partUpdated,
+  setupTimeline,
+  textPart,
+  toolPart,
+  userMessage,
+  waitForVisualSettle,
+} from "./fixture"
+
+test("adds patch files incrementally without resetting outer expansion", async ({ page }, testInfo) => {
+  const patchID = "prt_incremental_01_patch"
+  const followingID = "prt_incremental_02_following"
+  const first = patchFile("src/a.ts", "update")
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage(
+        [
+          toolPart(patchID, "apply_patch", "running", { files: [first.filePath] }, { metadata: { files: [first] } }),
+          textPart(followingID, "Following incremental patch"),
+        ],
+        { completed: false },
+      ),
+    ],
+    settings: { editToolPartsExpanded: true },
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  const trigger = page.locator(`[data-timeline-part-id="${patchID}"] [data-slot="collapsible-trigger"]`).first()
+  await expect(trigger).toHaveAttribute("aria-expanded", "true")
+  await waitForVisualSettle(page, [`[data-timeline-part-id="${patchID}"]`, `[data-timeline-part-id="${followingID}"]`])
+  const regions = defineVisualRegions({
+    patch: { selector: `[data-timeline-part-id="${patchID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  const second = patchFile("src/b.ts", "add")
+  const third = patchFile("src/old.ts", "delete")
+  await timeline.send(
+    partUpdated(
+      toolPart(
+        patchID,
+        "apply_patch",
+        "running",
+        { files: [first.filePath, second.filePath] },
+        { metadata: { files: [first, second] } },
+      ),
+    ),
+    240,
+  )
+  await timeline.send(
+    partUpdated(
+      toolPart(
+        patchID,
+        "apply_patch",
+        "completed",
+        { files: [first.filePath, second.filePath, third.filePath] },
+        { metadata: { files: [first, second, third] } },
+      ),
+    ),
+    800,
+  )
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "incremental-patch",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["patch", "following"] },
+        { type: "unique", regions: ["patch", "following"] },
+        { type: "stable", regions: ["patch", "following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: ["following"], maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+        { type: "preserve-bottom-anchor" },
+        { type: "flow", regions: ["patch", "following"] },
+      ],
+      { perMarker: true },
+    ),
+  )
+  await expect(trigger).toHaveAttribute("aria-expanded", "true")
+  await expect(page.locator('[data-scope="apply-patch"] [data-type="delete"]')).toBeVisible()
+})
+
+function patchFile(filePath: string, type: "add" | "update" | "delete") {
+  return {
+    filePath,
+    relativePath: filePath,
+    type,
+    additions: type === "delete" ? 0 : 4,
+    deletions: type === "add" ? 0 : 3,
+    before: type === "add" ? undefined : source(false),
+    after: type === "delete" ? undefined : source(true),
+  }
+}
+
+function source(changed: boolean) {
+  return Array.from({ length: 12 }, (_, index) => `export const value${index} = ${changed ? index + 1 : index}\n`).join(
+    "",
+  )
+}

packages/app/e2e/performance/timeline-stability/fixture.test.ts

@@ -0,0 +1,68 @@
+import { describe, expect, test } from "bun:test"
+import {
+  assistantMessage,
+  event,
+  toolPart,
+  userMessage,
+  validateTimelineEvent,
+  validateTimelineMessages,
+  type PartSeed,
+} from "./fixture"
+
+describe("timeline fixture validation", () => {
+  test("accepts a valid timeline", () => {
+    expect(validateTimelineMessages([userMessage(), assistantMessage()])).toHaveLength(2)
+  })
+
+  test("rejects malformed SDK values at runtime", () => {
+    expect(() =>
+      assistantMessage([], {
+        error: { name: "APIError", data: { message: "failed" } } as never,
+      }),
+    ).toThrow()
+    expect(() =>
+      validateTimelineEvent({
+        directory: "C:/OpenCode/TimelineStability",
+        payload: {
+          id: "evt_invalid_status",
+          type: "session.status",
+          properties: { sessionID: "ses_timeline_stability", status: { type: "retry", attempt: 1 } },
+        },
+      }),
+    ).toThrow()
+  })
+
+  test("rejects duplicate IDs and orphan assistants", () => {
+    expect(() => validateTimelineMessages([userMessage(), userMessage()])).toThrow(/duplicate message ID/)
+    expect(() =>
+      validateTimelineMessages([userMessage(), assistantMessage([], { parentID: "msg_missing_parent" })]),
+    ).toThrow(/parent user/)
+  })
+
+  test("assigns deterministic event IDs", () => {
+    const first = event("session.status", { sessionID: "ses_timeline_stability", status: { type: "busy" } })
+    const second = event("session.status", { sessionID: "ses_timeline_stability", status: { type: "idle" } })
+    expect(first.payload.id).toMatch(/^evt_timeline_\d{4}$/)
+    expect(Number(second.payload.id.slice(-4))).toBe(Number(first.payload.id.slice(-4)) + 1)
+  })
+})
+
+if (false) {
+  const userSeed = { id: "prt_type_user", type: "text", text: "typed" } satisfies PartSeed<"user">
+  userMessage([userSeed])
+
+  // @ts-expect-error Tool completion fields are not valid while pending.
+  toolPart("prt_invalid_pending", "bash", "pending", {}, { output: "impossible" })
+  // @ts-expect-error Tool completion fields are not valid while running.
+  toolPart("prt_invalid_running", "bash", "running", {}, { output: "impossible" })
+  // @ts-expect-error Tool error fields are not valid after completion.
+  toolPart("prt_invalid_completed", "bash", "completed", {}, { error: "impossible" })
+
+  assistantMessage([
+    // @ts-expect-error Agent references belong to user messages, not assistant messages.
+    { id: "prt_invalid_owner", type: "agent", name: "explore", source: { value: "@explore", start: 0, end: 8 } },
+  ])
+
+  // @ts-expect-error Retry status events require message and next.
+  event("session.status", { sessionID: "ses_timeline_stability", status: { type: "retry", attempt: 1 } })
+}

packages/app/e2e/performance/timeline-stability/fixture.ts

@@ -0,0 +1,568 @@
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { Event } from "@opencode-ai/schema/event"
+import { SessionStatusEvent } from "@opencode-ai/schema/session-status-event"
+import { SessionV1 } from "@opencode-ai/schema/session-v1"
+import type {
+  AssistantMessage,
+  GlobalEvent,
+  Message,
+  Part,
+  Session,
+  SessionStatus,
+  ToolPart,
+  ToolState,
+  UserMessage,
+} from "@opencode-ai/sdk/v2/client"
+import { expect, type Page } from "@playwright/test"
+import { Schema } from "effect"
+import { mockOpenCodeServer } from "../../utils/mock-server"
+import { installSseTransport } from "../../utils/sse-transport"
+import { expectSessionTitle } from "../../utils/waits"
+
+export const directory = "C:/OpenCode/TimelineStability"
+export const projectID = "proj_timeline_stability"
+export const sessionID = "ses_timeline_stability"
+export const userID = "msg_1000_timeline_user"
+export const assistantID = "msg_1001_timeline_assistant"
+export const title = "Timeline visual stability"
+export const model = { providerID: "opencode", modelID: "claude-opus-4-6", variant: "max" }
+
+type TimelinePayload = Extract<
+  GlobalEvent["payload"],
+  {
+    type:
+      | "message.updated"
+      | "message.removed"
+      | "message.part.updated"
+      | "message.part.removed"
+      | "message.part.delta"
+      | "session.status"
+  }
+>
+
+type DeepReadonly<Value> = Value extends readonly unknown[]
+  ? { readonly [Key in keyof Value]: DeepReadonly<Value[Key]> }
+  : Value extends object
+    ? { readonly [Key in keyof Value]: DeepReadonly<Value[Key]> }
+    : Value
+
+export type TimelineEvent = DeepReadonly<Omit<GlobalEvent, "payload"> & { payload: TimelinePayload }>
+export type EventPayload = TimelineEvent
+export type ToolStatus = ToolState["status"]
+export type TimelineMessage = { info: UserMessage; parts: Part[] } | { info: AssistantMessage; parts: Part[] }
+
+type UserPart = Extract<Part, { type: "text" | "file" | "agent" | "subtask" }>
+type AssistantPart = Exclude<Part, { type: "agent" | "subtask" }>
+type OwnedPart<Owner extends Message["role"]> = Owner extends "user" ? UserPart : AssistantPart
+export type PartSeed<Owner extends Message["role"]> =
+  OwnedPart<Owner> extends infer Candidate
+    ? Candidate extends Part
+      ? Omit<Candidate, "sessionID" | "messageID">
+      : never
+    : never
+
+type ToolOptions<State extends ToolStatus> = State extends "pending"
+  ? { output?: never; title?: never; metadata?: never; error?: never }
+  : State extends "running"
+    ? { title?: string; metadata?: Record<string, unknown>; output?: never; error?: never }
+    : State extends "error"
+      ? { error?: string; metadata?: Record<string, unknown>; output?: never; title?: never }
+      : { output?: string; title?: string; metadata?: Record<string, unknown>; error?: never }
+
+const decodeOptions = { errors: "all", onExcessProperty: "error" } as const
+const decodeMessage = Schema.decodeUnknownSync(SessionV1.WithParts)
+const decodePart = Schema.decodeUnknownSync(SessionV1.Part)
+const decodeStatus = Schema.decodeUnknownSync(SessionStatusEvent.Info)
+const timelineEventSchema = Schema.Union([
+  eventSchema("message.updated", SessionV1.Event.MessageUpdated.data),
+  eventSchema("message.removed", SessionV1.Event.MessageRemoved.data),
+  eventSchema("message.part.updated", SessionV1.Event.PartUpdated.data),
+  eventSchema("message.part.removed", SessionV1.Event.PartRemoved.data),
+  eventSchema("message.part.delta", SessionV1.Event.PartDelta.data),
+  eventSchema("session.status", SessionStatusEvent.Status.data),
+])
+const decodeEvent = Schema.decodeUnknownSync(timelineEventSchema)
+let eventSequence = 0
+
+export async function setupTimeline(
+  page: Page,
+  input: {
+    messages?: TimelineMessage[]
+    settings?: Record<string, boolean>
+    sessions?: Session[]
+    cpuRate?: number
+    viewport?: { width: number; height: number }
+    eventRetry?: number
+    reducedMotion?: boolean
+    locale?: string
+    deviceScaleFactor?: number
+    seedHistory?: boolean
+    protocol?: "v1" | "v2"
+  } = {},
+) {
+  const sessions = input.sessions ?? [session()]
+  const messages = validateTimelineMessages([
+    ...(input.seedHistory ? historyMessages(18) : []),
+    ...(input.messages ?? [userMessage(), assistantMessage()]),
+  ])
+  const active = messages.findLast((message) => message.info.role === "assistant")
+  const initialStatus = decodeStatus(
+    active?.info.role === "assistant" && active.info.time.completed === undefined ? { type: "busy" } : { type: "idle" },
+    decodeOptions,
+  )
+  const transport = await installSseTransport<EventPayload>(page, {
+    server: `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`,
+    retry: input.eventRetry ?? 20,
+  })
+  await mockOpenCodeServer(page, {
+    protocol: input.protocol,
+    directory,
+    project: project(),
+    provider: provider(),
+    sessions,
+    sessionStatus: { [sessionID]: initialStatus },
+    pageMessages: () => ({
+      items: messages,
+    }),
+  })
+  await page.addInitScript((settings) => {
+    localStorage.setItem(
+      "settings.v3",
+      JSON.stringify({
+        general: {
+          editToolPartsExpanded: false,
+          shellToolPartsExpanded: false,
+          showReasoningSummaries: false,
+          showSessionProgressBar: true,
+          ...settings,
+        },
+      }),
+    )
+    if (settings.newLayoutDesigns === false) {
+      localStorage.setItem("app-version.v1", JSON.stringify({ version: "1.17.20" }))
+    }
+  }, input.settings ?? {})
+  if (input.locale) {
+    await page.addInitScript((locale) => {
+      localStorage.setItem("opencode.global.dat:language", JSON.stringify({ locale }))
+    }, input.locale)
+  }
+  if (input.reducedMotion) await page.emulateMedia({ reducedMotion: "reduce" })
+  await page.setViewportSize(input.viewport ?? { width: 1400, height: 900 })
+  if (input.deviceScaleFactor) {
+    const devtools = await page.context().newCDPSession(page)
+    const viewport = input.viewport ?? { width: 1400, height: 900 }
+    await devtools.send("Emulation.setDeviceMetricsOverride", {
+      width: viewport.width,
+      height: viewport.height,
+      deviceScaleFactor: input.deviceScaleFactor,
+      mobile: false,
+    })
+  }
+  await page.goto(`/${base64Encode(directory)}/session/${sessionID}`)
+  await transport.waitForConnection()
+  await expectSessionTitle(page, title)
+  if (input.cpuRate && input.cpuRate > 1) {
+    const devtools = await page.context().newCDPSession(page)
+    await devtools.send("Emulation.setCPUThrottlingRate", { rate: input.cpuRate })
+  }
+
+  return {
+    transport,
+    async send(event: TimelineEvent, delay = 0) {
+      const valid = validateTimelineEvent(event)
+      await transport.send(valid, { marker: describeEvent(valid) })
+      if (delay) await page.waitForTimeout(delay)
+    },
+    async sendAll(sequence: { event: TimelineEvent; delay: number }[]) {
+      for (const item of sequence) {
+        const valid = validateTimelineEvent(item.event)
+        await transport.send(valid, { marker: describeEvent(valid) })
+        await page.waitForTimeout(item.delay)
+      }
+    },
+    async settle(frames = 3) {
+      await page.evaluate(
+        (frames) =>
+          new Promise<void>((resolve) => {
+            let remaining = frames
+            const tick = () => {
+              remaining--
+              if (remaining <= 0) return resolve()
+              requestAnimationFrame(tick)
+            }
+            requestAnimationFrame(tick)
+          }),
+        frames,
+      )
+    },
+    async waitForPart(partID: string) {
+      const part = page.locator(`[data-timeline-part-id="${partID}"]`)
+      await expect(part).toHaveCount(1)
+      await expect(part).toBeVisible()
+    },
+  }
+}
+
+function describeEvent(event: EventPayload) {
+  if (event.payload.type === "message.part.updated") {
+    const part = event.payload.properties.part
+    return [
+      event.payload.type,
+      part.id,
+      part.type === "tool" ? part.tool : part.type,
+      part.type === "tool" ? part.state.status : undefined,
+    ]
+      .filter(Boolean)
+      .join(":")
+  }
+  if (event.payload.type === "session.status") {
+    const status = event.payload.properties.status
+    return [event.payload.type, status.type, status.type === "retry" ? status.attempt : undefined]
+      .filter((value) => value !== undefined)
+      .join(":")
+  }
+  return event.payload.type
+}
+
+export function event<const Type extends TimelinePayload["type"]>(
+  type: Type,
+  properties: Extract<TimelinePayload, { type: Type }>["properties"],
+): TimelineEvent
+export function event(type: TimelinePayload["type"], properties: TimelinePayload["properties"]): TimelineEvent {
+  return validateTimelineEvent({
+    directory,
+    payload: { id: `evt_timeline_${String(++eventSequence).padStart(4, "0")}`, type, properties },
+  })
+}
+
+export function validateTimelineEvent(input: unknown): TimelineEvent {
+  return decodeEvent(input, decodeOptions)
+}
+
+export function validateTimelineMessages(input: readonly TimelineMessage[]): TimelineMessage[] {
+  input.forEach((message) => decodeMessage(message, decodeOptions))
+  const messages = [...input]
+  const messageIDs = new Set<string>()
+  const partIDs = new Set<string>()
+  const users = new Set(messages.filter((message) => message.info.role === "user").map((message) => message.info.id))
+
+  messages.forEach((message) => {
+    if (messageIDs.has(message.info.id))
+      throw new Error(`Timeline fixture has duplicate message ID: ${message.info.id}`)
+    messageIDs.add(message.info.id)
+    if (message.info.role === "assistant" && !users.has(message.info.parentID))
+      throw new Error(`Timeline assistant ${message.info.id} must reference a parent user in the fixture`)
+    message.parts.forEach((part) => {
+      if (part.sessionID !== message.info.sessionID || part.messageID !== message.info.id)
+        throw new Error(`Timeline part ${part.id} ownership does not match message ${message.info.id}`)
+      if (message.info.role === "user" && !["text", "file", "agent", "subtask"].includes(part.type))
+        throw new Error(`Timeline user message ${message.info.id} cannot own ${part.type} part ${part.id}`)
+      if (message.info.role === "assistant" && ["agent", "subtask"].includes(part.type))
+        throw new Error(`Timeline assistant message ${message.info.id} cannot own ${part.type} part ${part.id}`)
+      if (partIDs.has(part.id)) throw new Error(`Timeline fixture has duplicate part ID: ${part.id}`)
+      partIDs.add(part.id)
+    })
+  })
+  return messages
+}
+
+export async function waitForVisualSettle(page: Page, selectors: string[], stableFrames = 3) {
+  await page.waitForFunction(
+    ({ selectors, stableFrames }) => {
+      const elements = selectors.map((selector) => document.querySelector<HTMLElement>(selector))
+      if (elements.some((element) => !element)) return false
+      return new Promise<boolean>((resolve) => {
+        let stable = 0
+        let previous = ""
+        const sample = () => {
+          const signature = JSON.stringify(
+            elements.map((element) => {
+              const rect = element!.getBoundingClientRect()
+              return [Math.round(rect.top * 10), Math.round(rect.bottom * 10), Math.round(rect.height * 10)]
+            }),
+          )
+          stable = signature === previous ? stable + 1 : 0
+          previous = signature
+          const ordered = elements
+            .slice(1)
+            .every(
+              (element, index) =>
+                elements[index]!.getBoundingClientRect().bottom <= element!.getBoundingClientRect().top + 0.5,
+            )
+          if (stable >= stableFrames && ordered) return resolve(true)
+          requestAnimationFrame(sample)
+        }
+        requestAnimationFrame(sample)
+      })
+    },
+    { selectors, stableFrames },
+  )
+}
+
+export function historyMessages(count: number): TimelineMessage[] {
+  return Array.from({ length: count }, (_, index) => {
+    const value = String(index).padStart(4, "0")
+    const historyUserID = `msg_0${value}_history_a_user`
+    return [
+      userMessage(undefined, { id: historyUserID, created: 1690000000000 + index * 10_000 }),
+      assistantMessage(
+        [
+          {
+            id: `prt_0${value}_history_text`,
+            type: "text",
+            text: `Historical response ${index}. ${"Existing session content keeps the virtual timeline realistic. ".repeat(5)}`,
+          },
+        ],
+        {
+          id: `msg_0${value}_history_b_assistant`,
+          parentID: historyUserID,
+          created: 1690000001000 + index * 10_000,
+        },
+      ),
+    ]
+  }).flat()
+}
+
+export function partUpdated(part: Part | PartSeed<"assistant">) {
+  const owned = "messageID" in part ? part : { ...part, sessionID, messageID: assistantID }
+  decodePart(owned, decodeOptions)
+  return event("message.part.updated", {
+    sessionID,
+    part: owned,
+    time: 1700000002000,
+  })
+}
+
+export function partDelta(partID: string, delta: string, messageID = assistantID) {
+  return event("message.part.delta", { sessionID, messageID, partID, field: "text", delta })
+}
+
+export function messageUpdated(info: Message) {
+  return event("message.updated", { sessionID, info })
+}
+
+export function status(type: SessionStatus["type"], attempt = 1) {
+  return event("session.status", {
+    sessionID,
+    status: type === "retry" ? { type, attempt, message: "Rate limited", next: 1700000010000 } : { type },
+  })
+}
+
+export function userMessage(
+  parts?: PartSeed<"user">[],
+  input: { id?: string; summary?: UserMessage["summary"]; created?: number } = {},
+): Extract<TimelineMessage, { info: { role: "user" } }> {
+  const id = input.id ?? userID
+  const seeds = parts ?? [userText("Build the timeline stability matrix.", { id: `prt_${id}_text` })]
+  const message = {
+    info: {
+      id,
+      sessionID,
+      role: "user",
+      time: { created: input.created ?? 1700000000000 },
+      summary: input.summary ?? { diffs: [] },
+      agent: "build",
+      model,
+    },
+    parts: seeds.map((part) => ({
+      ...part,
+      sessionID,
+      messageID: id,
+    })),
+  } satisfies Extract<TimelineMessage, { info: { role: "user" } }>
+  decodeMessage(message, decodeOptions)
+  return message
+}
+
+export function assistantMessage(
+  parts: PartSeed<"assistant">[] = [],
+  input: {
+    id?: string
+    parentID?: string
+    completed?: boolean
+    error?: AssistantMessage["error"]
+    created?: number
+  } = {},
+): Extract<TimelineMessage, { info: { role: "assistant" } }> {
+  const id = input.id ?? assistantID
+  const message = {
+    info: {
+      id,
+      sessionID,
+      role: "assistant",
+      time: {
+        created: input.created ?? 1700000001000,
+        ...(input.completed === false ? {} : { completed: (input.created ?? 1700000001000) + 1_000 }),
+      },
+      parentID: input.parentID ?? userID,
+      modelID: model.modelID,
+      providerID: model.providerID,
+      mode: "build",
+      agent: "build",
+      path: { cwd: directory, root: directory },
+      cost: 0.01,
+      tokens: { input: 100, output: 200, reasoning: 0, cache: { read: 0, write: 0 } },
+      variant: "max",
+      ...(input.error ? { error: input.error } : {}),
+    },
+    parts: parts.map((part) => ({ ...part, sessionID, messageID: id })),
+  } satisfies Extract<TimelineMessage, { info: { role: "assistant" } }>
+  decodeMessage(message, decodeOptions)
+  return message
+}
+
+export function userText(
+  text: string,
+  input: Partial<Omit<Extract<PartSeed<"user">, { type: "text" }>, "type" | "text">> = {},
+): Extract<PartSeed<"user">, { type: "text" }> {
+  return { id: "prt_user_text", type: "text", text, ...input }
+}
+
+export function textPart(id: string, text: string): Extract<PartSeed<"assistant">, { type: "text" }> {
+  return { id, type: "text", text }
+}
+
+export function reasoningPart(id: string, text: string): Extract<PartSeed<"assistant">, { type: "reasoning" }> {
+  return { id, type: "reasoning", text, time: { start: 1700000001000 } }
+}
+
+export function toolPart(
+  id: string,
+  tool: string,
+  state: "pending",
+  input: Record<string, unknown>,
+  options?: ToolOptions<"pending">,
+): Omit<ToolPart, "sessionID" | "messageID">
+export function toolPart(
+  id: string,
+  tool: string,
+  state: "running",
+  input: Record<string, unknown>,
+  options?: ToolOptions<"running">,
+): Omit<ToolPart, "sessionID" | "messageID">
+export function toolPart(
+  id: string,
+  tool: string,
+  state: "completed",
+  input: Record<string, unknown>,
+  options?: ToolOptions<"completed">,
+): Omit<ToolPart, "sessionID" | "messageID">
+export function toolPart(
+  id: string,
+  tool: string,
+  state: "error",
+  input: Record<string, unknown>,
+  options?: ToolOptions<"error">,
+): Omit<ToolPart, "sessionID" | "messageID">
+export function toolPart(
+  id: string,
+  tool: string,
+  state: ToolStatus,
+  input: Record<string, unknown>,
+  options: ToolOptions<ToolStatus> = {},
+): Omit<ToolPart, "sessionID" | "messageID"> {
+  const base = { id, type: "tool" as const, callID: `call_${id}`, tool }
+  if (state === "pending") return { ...base, state: { status: state, input, raw: "" } }
+  if (state === "running")
+    return {
+      ...base,
+      state: {
+        status: state,
+        input,
+        title: options.title,
+        metadata: options.metadata ?? {},
+        time: { start: 1700000001000 },
+      },
+    }
+  if (state === "error")
+    return {
+      ...base,
+      state: {
+        status: state,
+        input,
+        error: options.error ?? "Tool failed",
+        metadata: options.metadata ?? {},
+        time: { start: 1700000001000, end: 1700000002000 },
+      },
+    }
+  return {
+    ...base,
+    state: {
+      status: state,
+      input,
+      output: options.output ?? "Completed",
+      title: options.title ?? tool,
+      metadata: options.metadata ?? {},
+      time: { start: 1700000001000, end: 1700000002000 },
+    },
+  }
+}
+
+export function shell(
+  id: string,
+  state: ToolStatus,
+  output = "",
+  command = `echo ${id}`,
+): Omit<ToolPart, "sessionID" | "messageID"> {
+  if (state === "pending") return toolPart(id, "bash", state, { command })
+  if (state === "running")
+    return toolPart(id, "bash", state, { command }, { title: command, metadata: { command, output } })
+  if (state === "error")
+    return toolPart(id, "bash", state, { command }, { error: output || undefined, metadata: { command, output } })
+  return toolPart(id, "bash", state, { command }, { title: command, output, metadata: { command, output } })
+}
+
+export function completedAssistantInfo(info: AssistantMessage): AssistantMessage {
+  return { ...info, time: { ...info.time, completed: 1700000003000 } }
+}
+
+export function project() {
+  return {
+    id: projectID,
+    worktree: directory,
+    vcs: "git",
+    name: "timeline-stability",
+    time: { created: 1700000000000, updated: 1700000000000 },
+    sandboxes: [],
+  }
+}
+
+export function session(input: Partial<Session> = {}): Session {
+  return {
+    id: sessionID,
+    slug: "timeline-stability",
+    projectID,
+    directory,
+    title,
+    version: "dev",
+    time: { created: 1700000000000, updated: 1700000000000 },
+    ...input,
+  }
+}
+
+function eventSchema<
+  const Type extends TimelinePayload["type"],
+  const Properties extends Schema.Codec<unknown, unknown>,
+>(type: Type, properties: Properties) {
+  return Schema.Struct({
+    directory: Schema.String,
+    project: Schema.optional(Schema.String),
+    workspace: Schema.optional(Schema.String),
+    payload: Schema.Struct({ id: Event.ID, type: Schema.Literal(type), properties }),
+  })
+}
+
+function provider() {
+  return {
+    all: [
+      {
+        id: "opencode",
+        name: "OpenCode",
+        models: { "claude-opus-4-6": { id: "claude-opus-4-6", name: "Claude Opus 4.6", limit: { context: 200_000 } } },
+      },
+    ],
+    connected: ["opencode"],
+    default: { providerID: "opencode", modelID: "claude-opus-4-6" },
+  }
+}

packages/app/e2e/performance/timeline-stability/interaction.spec.ts

@@ -0,0 +1,242 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import { assistantMessage, setupTimeline, shell, textPart, toolPart, userMessage, waitForVisualSettle } from "./fixture"
+
+test("expands and collapses a long completed shell without overlap", async ({ page }, testInfo) => {
+  const shellID = "prt_interaction_01_shell"
+  const followingID = "prt_interaction_02_following"
+  await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([shell(shellID, "completed", lines(50)), textPart(followingID, "Following shell expansion")]),
+    ],
+    settings: { shellToolPartsExpanded: false },
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  const trigger = page.locator(`[data-timeline-part-id="${shellID}"] [data-slot="collapsible-trigger"]`)
+  await waitForVisualSettle(page, [`[data-timeline-part-id="${shellID}"]`, `[data-timeline-part-id="${followingID}"]`])
+  const regions = defineVisualRegions({
+    shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  const plan = visualPlan(regions, [
+    { type: "required", regions: ["shell", "following"] },
+    { type: "unique", regions: ["shell", "following"] },
+    { type: "stable", regions: ["shell", "following"] },
+    { type: "opacity", regions: "all" },
+    { type: "continuity", regions: "all" },
+    { type: "motion", regions: "all", maxPositionReversals: 0 },
+    { type: "label-stability", regions: "all" },
+    { type: "preserve-bottom-anchor" },
+    { type: "flow", regions: ["shell", "following"] },
+  ])
+  await startVisualProbe(page, regions)
+  await trigger.click()
+  await expect(trigger).toHaveAttribute("aria-expanded", "true")
+  await page.waitForTimeout(500)
+  const expanded = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(testInfo, "shell-expand", expanded, plan)
+
+  await startVisualProbe(page, regions)
+  await trigger.click()
+  await expect(trigger).toHaveAttribute("aria-expanded", "false")
+  await page.waitForTimeout(500)
+  const collapsed = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(testInfo, "shell-collapse", collapsed, plan)
+})
+
+test("expands and collapses a completed context group without overlap", async ({ page }, testInfo) => {
+  const ids = [
+    "prt_interaction_01_read",
+    "prt_interaction_02_glob",
+    "prt_interaction_03_grep",
+    "prt_interaction_04_list",
+  ]
+  const group = `[data-timeline-part-ids="${ids.join(",")}"]`
+  const followingID = "prt_interaction_context_following"
+  await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([
+        toolPart(ids[0]!, "read", "completed", { filePath: "src/a.ts" }),
+        toolPart(ids[1]!, "glob", "completed", { path: ".", pattern: "**/*.ts" }),
+        toolPart(ids[2]!, "grep", "completed", { path: ".", pattern: "stable" }),
+        toolPart(ids[3]!, "list", "completed", { path: "src" }),
+        textPart(followingID, "Following context expansion"),
+      ]),
+    ],
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  const trigger = page.locator(`${group} [data-slot="collapsible-trigger"]`)
+  await waitForVisualSettle(page, [group, `[data-timeline-part-id="${followingID}"]`])
+  for (const [name, expanded] of [
+    ["context-expand", true],
+    ["context-collapse", false],
+    ["context-reexpand", true],
+  ] as const) {
+    const regions = defineVisualRegions({
+      context: { selector: group, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: `[data-timeline-part-id="${followingID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    await trigger.click()
+    await expect(trigger).toHaveAttribute("aria-expanded", String(expanded))
+    await page.waitForTimeout(500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      name,
+      trace,
+      visualPlan(regions, [
+        { type: "required", regions: ["context", "following"] },
+        { type: "unique", regions: ["context", "following"] },
+        { type: "stable", regions: ["context", "following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+        { type: "preserve-bottom-anchor" },
+        { type: "flow", regions: ["context", "following"] },
+      ]),
+    )
+  }
+})
+
+test("expands and collapses an edit diff without moving twice", async ({ page }, testInfo) => {
+  const editID = "prt_interaction_edit"
+  const followingID = "prt_interaction_edit_following"
+  await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([
+        toolPart(
+          editID,
+          "edit",
+          "completed",
+          { filePath: "src/edit.ts" },
+          {
+            metadata: {
+              filediff: {
+                file: "src/edit.ts",
+                additions: 40,
+                deletions: 40,
+                before: source(40, false),
+                after: source(40, true),
+              },
+            },
+          },
+        ),
+        textPart(followingID, "Following edit expansion"),
+      ]),
+    ],
+    settings: { editToolPartsExpanded: false },
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  const trigger = page.locator(`[data-timeline-part-id="${editID}"] [data-slot="collapsible-trigger"]`).first()
+  await waitForVisualSettle(page, [`[data-timeline-part-id="${editID}"]`, `[data-timeline-part-id="${followingID}"]`])
+  const regions = defineVisualRegions({
+    edit: { selector: `[data-timeline-part-id="${editID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await trigger.click()
+  await expect(trigger).toHaveAttribute("aria-expanded", "true")
+  await page.waitForTimeout(900)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "edit-expand",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["edit", "following"] },
+      { type: "unique", regions: ["edit", "following"] },
+      { type: "stable", regions: ["edit", "following"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 0, maxReversals: 1 },
+      { type: "label-stability", regions: "all" },
+      { type: "preserve-bottom-anchor" },
+      { type: "flow", regions: ["edit", "following"] },
+    ]),
+  )
+})
+
+test("shows all and expands historical diff summary without overlap", async ({ page }, testInfo) => {
+  const firstUser = userMessage(undefined, {
+    summary: {
+      diffs: Array.from({ length: 12 }, (_, index) => ({
+        file: `src/diff-${index}.ts`,
+        additions: 1,
+        deletions: 1,
+        patch: `@@ -1 +1 @@\n-export const value = ${index}\n+export const value = ${index + 1}`,
+      })),
+    },
+  })
+  const nextUserID = "msg_2000_diff_interaction_user"
+  await setupTimeline(page, {
+    messages: [
+      firstUser,
+      assistantMessage(),
+      userMessage(undefined, { id: nextUserID, created: 1700000010000 }),
+      assistantMessage([], {
+        id: "msg_2001_diff_interaction_assistant",
+        parentID: nextUserID,
+        created: 1700000011000,
+      }),
+    ],
+    cpuRate: 4,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  await scroller.evaluate((element) => (element.scrollTop = 0))
+  const diff = page.locator('[data-timeline-row="DiffSummary"]')
+  const following = page.locator(`[data-message-id="${nextUserID}"]`).first()
+  await expect(diff).toBeVisible()
+  const regions = defineVisualRegions({
+    diff: { selector: '[data-timeline-row="DiffSummary"]' },
+    following: { selector: `[data-message-id="${nextUserID}"]` },
+  })
+  await startVisualProbe(page, regions)
+  await page.getByText(/show all/i).click()
+  await page.waitForTimeout(500)
+  await diff.locator('[data-slot="session-turn-diff-trigger"]').first().click()
+  await page.waitForTimeout(900)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "diff-summary-expand",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["diff", "following"] },
+      { type: "unique", regions: ["diff", "following"] },
+      { type: "stable", regions: ["diff", "following"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 1, maxReversals: 2 },
+      { type: "label-stability", regions: "all" },
+      { type: "flow", regions: ["diff", "following"] },
+    ]),
+  )
+})
+
+function lines(count: number) {
+  return Array.from({ length: count }, (_, index) => `line ${index + 1}`).join("\n")
+}
+
+function source(count: number, changed: boolean) {
+  return Array.from(
+    { length: count },
+    (_, index) => `export const value${index} = ${changed ? index + 1 : index}\n`,
+  ).join("")
+}

packages/app/e2e/performance/timeline-stability/lifecycle.spec.ts

@@ -0,0 +1,157 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  mapVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  completedAssistantInfo,
+  messageUpdated,
+  partDelta,
+  partUpdated,
+  reasoningPart,
+  setupTimeline,
+  shell,
+  status,
+  textPart,
+  userMessage,
+  waitForVisualSettle,
+} from "./fixture"
+
+test.describe("timeline visual lifecycle stability", () => {
+  test("streams empty, short, and long parallel shells to staggered completion", async ({ page }, testInfo) => {
+    test.setTimeout(180_000)
+    const ids = ["prt_parallel_01_empty", "prt_parallel_02_short", "prt_parallel_03_long"] as const
+    const initial = ids.map((id) => shell(id, "running"))
+    const followingID = "prt_parallel_04_following"
+    const assistant = assistantMessage([...initial, textPart(followingID, "Following all parallel shells.")], {
+      completed: false,
+    })
+    const timeline = await setupTimeline(page, {
+      messages: [userMessage(), assistant],
+      settings: { shellToolPartsExpanded: true, showReasoningSummaries: true },
+      cpuRate: 4,
+      eventRetry: 24,
+      seedHistory: true,
+    })
+    await timeline.send(status("busy"), 150)
+    for (const id of ids) await timeline.waitForPart(id)
+    const scroller = page.locator(".scroll-view__viewport", {
+      has: page.locator('[data-timeline-row="AssistantPart"]'),
+    })
+    await scroller.evaluate((element) => (element.scrollTop = element.scrollHeight))
+    const regions = defineVisualRegions({
+      prt_shell_empty: shellRegion(ids[0]),
+      prt_shell_short: shellRegion(ids[1]),
+      prt_shell_long: shellRegion(ids[2]),
+      following: shellRegion(followingID),
+    })
+    await waitForVisualSettle(page, [`[data-timeline-part-id="${followingID}"]`])
+    await startVisualProbe(page, regions)
+    await timeline.sendAll([
+      { event: partUpdated(shell(ids[0]!, "completed", "")), delay: 180 },
+      { event: partUpdated(shell(ids[2]!, "running", lines(10))), delay: 70 },
+      { event: partUpdated(shell(ids[1]!, "running", lines(2))), delay: 110 },
+      { event: partUpdated(shell(ids[2]!, "running", lines(25))), delay: 80 },
+      { event: partUpdated(shell(ids[1]!, "completed", lines(2))), delay: 260 },
+      { event: partUpdated(shell(ids[2]!, "running", lines(50))), delay: 100 },
+      { event: partUpdated(shell(ids[2]!, "completed", lines(50))), delay: 450 },
+      { event: messageUpdated(completedAssistantInfo(assistant.info)), delay: 100 },
+      { event: status("idle"), delay: 700 },
+    ])
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      "parallel-shells",
+      trace,
+      visualPlan(
+        regions,
+        [
+          { type: "required", regions: ["prt_shell_empty", "prt_shell_short", "prt_shell_long", "following"] },
+          { type: "unique", regions: ["prt_shell_empty", "prt_shell_short", "prt_shell_long"] },
+          { type: "stable", regions: ["prt_shell_empty", "prt_shell_short", "prt_shell_long", "following"] },
+          { type: "opacity", regions: "all" },
+          { type: "continuity", regions: "all" },
+          { type: "motion", regions: "all", maxPositionReversals: 0, maxReversals: 4 },
+          { type: "label-stability", regions: "all" },
+          { type: "preserve-bottom-anchor" },
+          { type: "flow", regions: ["prt_shell_empty", "prt_shell_short", "prt_shell_long", "following"] },
+        ],
+        { perMarker: true },
+      ),
+    )
+    await expect(page.locator(`[data-timeline-part-id="${ids[2]}"] [data-slot="bash-pre"]`)).toContainText("line 50")
+
+    const short = page.locator(`[data-timeline-part-id="${ids[1]}"]`)
+    await short.locator('[data-slot="collapsible-trigger"]').click()
+    await expect(short.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "false")
+    await timeline.send(partUpdated(textPart("prt_late_sibling", "A later sibling rerender.")), 250)
+    await expect(short.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "false")
+  })
+
+  test("replaces thinking with streamed reasoning and text without a blank visible turn", async ({
+    page,
+  }, testInfo) => {
+    const reasoningID = "prt_reasoning_visible"
+    const textID = "prt_streamed_text"
+    const assistant = assistantMessage([], { completed: false })
+    const timeline = await setupTimeline(page, {
+      messages: [userMessage(), assistant],
+      settings: { showReasoningSummaries: true },
+      cpuRate: 4,
+    })
+    await timeline.send(status("busy"), 120)
+    await expect(page.locator('[data-timeline-row="Thinking"]')).toBeVisible()
+
+    const regions = defineVisualRegions({
+      thinking: { selector: '[data-timeline-row="Thinking"]' },
+      reasoning: {
+        selector: `[data-timeline-part-id="${reasoningID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+      text: { selector: `[data-timeline-part-id="${textID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    })
+    await startVisualProbe(page, regions)
+    await timeline.send(partUpdated(reasoningPart(reasoningID, "")), 100)
+    await expect(page.locator(`[data-timeline-part-id="${reasoningID}"]`)).toHaveCount(0)
+    await timeline.send(partUpdated(reasoningPart(reasoningID, "## Planning\n\nChecking the visible timeline.")), 160)
+    await timeline.waitForPart(reasoningID)
+    await expect(page.locator('[data-timeline-row="Thinking"]')).toHaveCount(0)
+    await timeline.send(partUpdated(textPart(textID, "Starting")), 100)
+    await timeline.send(partDelta(textID, " **stable"), 90)
+    await timeline.send(partDelta(textID, " output** with `code` and [a link"), 130)
+    await timeline.send(partDelta(textID, "](https://example.com)."), 220)
+    await timeline.send(messageUpdated(completedAssistantInfo(assistant.info)), 120)
+    await timeline.send(status("idle"), 500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      "reasoning-text-handoff",
+      trace,
+      visualPlan(regions, [
+        { type: "required", regions: ["reasoning", "text"] },
+        { type: "continuous-any", regions: ["thinking", "reasoning", "text"] },
+        { type: "unique", regions: ["reasoning", "text"] },
+        { type: "stable", regions: ["reasoning", "text"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxReversals: 4 },
+        { type: "label-stability", regions: "all" },
+        { type: "flow", regions: ["reasoning", "text"] },
+      ]),
+    )
+    await expect(page.locator(`[data-timeline-part-id="${textID}"]`)).toContainText("stable output")
+  })
+})
+
+function lines(count: number) {
+  return Array.from({ length: count }, (_, index) => `line ${index + 1}`).join("\n")
+}
+
+function shellRegion(id: string) {
+  return { selector: `[data-timeline-part-id="${id}"]`, closest: '[data-timeline-row="AssistantPart"]' }
+}

packages/app/e2e/performance/timeline-stability/oracle-browser.spec.ts

@@ -0,0 +1,75 @@
+import { expect, test } from "@playwright/test"
+import {
+  analyzeVisualObservations,
+  defineVisualRegions,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import { assistantMessage, setupTimeline, textPart, userMessage } from "./fixture"
+
+test("detects blanking caused by ancestor opacity", async ({ page }) => {
+  const partID = "prt_oracle_ancestor_opacity"
+  await setupTimeline(page, { messages: [userMessage(), assistantMessage([textPart(partID, "Visible content")])] })
+  const row = page.locator(`[data-timeline-part-id="${partID}"]`).first()
+  const regions = defineVisualRegions({
+    content: { selector: `[data-timeline-part-id="${partID}"]` },
+  })
+  await startVisualProbe(page, regions)
+  await row.evaluate((element) => {
+    element.parentElement!.style.opacity = "0"
+  })
+  await page.waitForTimeout(50)
+  await row.evaluate((element) => {
+    element.parentElement!.style.opacity = "1"
+  })
+  await page.waitForTimeout(50)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  const issues = analyzeVisualObservations(
+    trace.samples,
+    visualPlan(regions, [
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all" },
+      { type: "label-stability", regions: "all" },
+    ]),
+  )
+
+  expect(issues.some((issue) => issue.includes("blanked between visible frames"))).toBe(true)
+})
+
+test("detects root opacity when probing descendant opacity", async ({ page }) => {
+  const partID = "prt_oracle_descendant_opacity"
+  await setupTimeline(page, { messages: [userMessage(), assistantMessage([textPart(partID, "Visible content")])] })
+  const row = page.locator(`[data-timeline-part-id="${partID}"]`).first()
+  await row.evaluate((element) => {
+    element.innerHTML = '<span data-probe-opacity="true">Visible content</span>'
+  })
+  const regions = defineVisualRegions({
+    content: {
+      selector: `[data-timeline-part-id="${partID}"]`,
+      opacitySelectors: ['[data-probe-opacity="true"]'],
+    },
+  })
+  await startVisualProbe(page, regions)
+  await row.evaluate((element) => {
+    ;(element as HTMLElement).style.opacity = "0"
+  })
+  await page.waitForTimeout(50)
+  await row.evaluate((element) => {
+    ;(element as HTMLElement).style.opacity = "1"
+  })
+  await page.waitForTimeout(50)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  const issues = analyzeVisualObservations(
+    trace.samples,
+    visualPlan(regions, [
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all" },
+      { type: "label-stability", regions: "all" },
+    ]),
+  )
+
+  expect(issues.some((issue) => issue.includes("blanked between visible frames"))).toBe(true)
+})

packages/app/e2e/performance/timeline-stability/playwright.config.ts

@@ -0,0 +1,17 @@
+import config from "../playwright.config"
+
+export default {
+  ...config,
+  testDir: ".",
+  testMatch: "**/*.spec.ts",
+  outputDir: "../../test-results/timeline-stability",
+  reporter: [["html", { outputFolder: "../../playwright-report/timeline-stability", open: "never" }], ["line"]],
+  retries: 0,
+  workers: 1,
+  use: {
+    ...config.use,
+    trace: "retain-on-failure",
+    screenshot: "only-on-failure",
+    video: "retain-on-failure",
+  },
+}

packages/app/e2e/performance/timeline-stability/scroll-interaction.spec.ts

@@ -0,0 +1,353 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  partUpdated,
+  setupTimeline,
+  shell,
+  textPart,
+  userMessage,
+  type TimelineMessage,
+} from "./fixture"
+
+test("does not reverse visible rows when the user wheels during shell remeasurement", async ({ page }, testInfo) => {
+  const shellID = "prt_wheel_01_shell"
+  const followingID = "prt_wheel_02_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      ...history(12),
+      userMessage(),
+      assistantMessage([shell(shellID, "running"), textPart(followingID, "Following wheel interaction")], {
+        completed: false,
+      }),
+    ],
+    settings: { shellToolPartsExpanded: true },
+    cpuRate: 4,
+    reducedMotion: true,
+    seedHistory: true,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  const regions = defineVisualRegions({
+    shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partUpdated(shell(shellID, "running", lines(30))), 80)
+  await scroller.evaluate((element) =>
+    element.dispatchEvent(new WheelEvent("wheel", { bubbles: true, cancelable: true, deltaY: -180 })),
+  )
+  await scroller.evaluate((element) => (element.scrollTop -= 180))
+  await timeline.send(partUpdated(shell(shellID, "running", lines(50))), 250)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(testInfo, "wheel-during-resize", trace, rowPairPlan(regions, 1))
+})
+
+test("keeps moving upward while drag-selecting above the timeline", async ({ page }) => {
+  await setupTimeline(page, {
+    messages: history(80),
+    viewport: { width: 1400, height: 700 },
+    reducedMotion: true,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  const text = page.getByText("History 79.", { exact: false })
+  await expect(text).toBeVisible()
+  await scroller.evaluate((element) => {
+    element.dataset.selectionLength = "0"
+    document.addEventListener("selectionchange", () => {
+      element.dataset.selectionLength = String(
+        Math.max(Number(element.dataset.selectionLength), window.getSelection()?.toString().length ?? 0),
+      )
+    })
+  })
+  const textBox = await text.boundingBox()
+  const scrollBox = await scroller.boundingBox()
+  expect(textBox).not.toBeNull()
+  expect(scrollBox).not.toBeNull()
+  if (!textBox || !scrollBox) return
+
+  await page.mouse.move(textBox.x + textBox.width - 10, textBox.y + textBox.height / 2)
+  await page.mouse.down()
+  await page.mouse.move(textBox.x + 20, scrollBox.y - 120, { steps: 30 })
+
+  await expect.poll(() => scroller.evaluate((element) => Number(element.dataset.selectionLength))).toBeGreaterThan(0)
+  await expect
+    .poll(() => scroller.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop))
+    .toBeGreaterThan(500)
+  await page.mouse.up()
+})
+
+test("does not pull a keyboard-scrolled user during shell remeasurement", async ({ page }, testInfo) => {
+  const shellID = "prt_keyboard_01_shell"
+  const followingID = "prt_keyboard_02_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      ...history(12),
+      userMessage(),
+      assistantMessage([shell(shellID, "running"), textPart(followingID, "Following keyboard interaction")], {
+        completed: false,
+      }),
+    ],
+    settings: { shellToolPartsExpanded: true },
+    cpuRate: 4,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  await scroller.focus()
+  for (let index = 0; index < 3; index++) {
+    await scroller.press("PageUp")
+    await page.waitForTimeout(250)
+  }
+  await expect
+    .poll(() => scroller.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop), {
+      timeout: 20_000,
+    })
+    .toBeGreaterThan(80)
+  await page.waitForFunction(() => {
+    const root = [...document.querySelectorAll<HTMLElement>(".scroll-view__viewport")].find((element) =>
+      element.querySelector("[data-timeline-row]"),
+    )
+    if (!root) return false
+    return new Promise<boolean>((resolve) => {
+      const top = root.scrollTop
+      requestAnimationFrame(() => requestAnimationFrame(() => resolve(Math.abs(root.scrollTop - top) <= 0.5)))
+    })
+  })
+  const anchor = await scroller.evaluate((element) => {
+    const view = element.getBoundingClientRect()
+    return [...element.querySelectorAll<HTMLElement>("[data-timeline-key]")].find((row) => {
+      const rect = row.getBoundingClientRect()
+      return rect.top >= view.top + 40 && rect.bottom <= view.bottom - 40
+    })?.dataset.timelineKey
+  })
+  expect(anchor).toBeTruthy()
+  const regions = defineVisualRegions({
+    anchor: { selector: `[data-timeline-key="${anchor}"]` },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partUpdated(shell(shellID, "running", lines(50))), 400)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(testInfo, "keyboard-during-resize", trace, anchorPlan(regions))
+})
+
+test("tracks keyboard scrolling from a focused timeline descendant", async ({ page }, testInfo) => {
+  const shellID = "prt_descendant_keyboard_01_shell"
+  const timeline = await setupTimeline(page, {
+    messages: [...history(12), userMessage(), assistantMessage([shell(shellID, "completed", lines(5))])],
+    settings: { shellToolPartsExpanded: false },
+    cpuRate: 4,
+    reducedMotion: true,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  const row = page.locator(`[data-timeline-part-id="${shellID}"]`).first()
+  const trigger = page.locator(`[data-timeline-part-id="${shellID}"] [data-slot="collapsible-trigger"]`)
+  await row.evaluate((element) => element.setAttribute("tabindex", "0"))
+  await row.focus()
+  for (let index = 0; index < 3; index++) {
+    await row.press("PageUp")
+    await page.waitForTimeout(250)
+  }
+  await expect
+    .poll(() => scroller.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop))
+    .toBeGreaterThan(5)
+  const anchor = await scroller.evaluate((element) => {
+    const view = element.getBoundingClientRect()
+    return [...element.querySelectorAll<HTMLElement>("[data-timeline-key]")].find((row) => {
+      const rect = row.getBoundingClientRect()
+      return rect.top >= view.top + 40 && rect.bottom <= view.bottom - 40
+    })?.dataset.timelineKey
+  })
+  expect(anchor).toBeTruthy()
+  const regions = defineVisualRegions({
+    anchor: { selector: `[data-timeline-key="${anchor}"]` },
+  })
+  await startVisualProbe(page, regions)
+  await trigger.click()
+  await page.waitForTimeout(300)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(testInfo, "descendant-keyboard-resize", trace, anchorPlan(regions))
+})
+
+test("does not claim keyboard scrolling owned by a nested scrollable", async ({ page }) => {
+  const shellID = "prt_nested_keyboard_shell"
+  await setupTimeline(page, {
+    messages: [userMessage(), assistantMessage([shell(shellID, "completed", lines(50))])],
+    settings: { shellToolPartsExpanded: true },
+    cpuRate: 4,
+    reducedMotion: true,
+    seedHistory: true,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  const nested = page.locator(`[data-timeline-part-id="${shellID}"] [data-scrollable]`)
+  await nested.evaluate((element) => (element.scrollTop = element.scrollHeight))
+  await nested.focus()
+  await page.waitForFunction(() => {
+    const root = [...document.querySelectorAll<HTMLElement>(".scroll-view__viewport")].find((element) =>
+      element.querySelector("[data-timeline-row]"),
+    )
+    if (!root) return false
+    return new Promise<boolean>((resolve) => {
+      const top = root.scrollTop
+      requestAnimationFrame(() => requestAnimationFrame(() => resolve(Math.abs(root.scrollTop - top) <= 0.5)))
+    })
+  })
+  const before = await scroller.evaluate((element) => element.scrollTop)
+  const nestedBefore = await nested.evaluate((element) => element.scrollTop)
+  await nested.press("PageUp")
+  await page.waitForTimeout(300)
+  expect(await scroller.evaluate((element) => element.scrollTop)).toBe(before)
+  expect(await nested.evaluate((element) => element.scrollTop)).toBeLessThan(nestedBefore)
+
+  await nested.evaluate((element) => (element.scrollTop = 0))
+  await scroller.evaluate((element) => (element.scrollTop = Math.min(300, element.scrollHeight - element.clientHeight)))
+  const boundaryBefore = await scroller.evaluate((element) => element.scrollTop)
+  expect(boundaryBefore).toBeGreaterThan(0)
+  await nested.press("PageUp")
+  await expect.poll(() => scroller.evaluate((element) => element.scrollTop)).toBeLessThan(boundaryBefore)
+
+  const nonOverflowing = page.locator(`[data-timeline-part-id="${shellID}"]`).first()
+  await nonOverflowing.evaluate((element) => {
+    element.setAttribute("data-scrollable", "")
+    element.setAttribute("tabindex", "0")
+  })
+  await nonOverflowing.focus()
+  const nonOverflowBefore = await scroller.evaluate((element) => element.scrollTop)
+  await nonOverflowing.press("PageUp")
+  await expect.poll(() => scroller.evaluate((element) => element.scrollTop)).toBeLessThan(nonOverflowBefore)
+})
+
+test("jump to latest lands on stable final rows after offscreen growth", async ({ page }, testInfo) => {
+  const shellID = "prt_jump_01_shell"
+  const followingID = "prt_jump_02_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      ...history(20),
+      userMessage(),
+      assistantMessage([shell(shellID, "running"), textPart(followingID, "Latest visible row")], { completed: false }),
+    ],
+    settings: { shellToolPartsExpanded: true },
+    cpuRate: 4,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  await scroller.evaluate(
+    (element) => (element.scrollTop = Math.max(0, element.scrollHeight - element.clientHeight - 600)),
+  )
+  await timeline.send(partUpdated(shell(shellID, "running", lines(50))), 300)
+  const regions = defineVisualRegions({
+    shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await page.getByRole("button", { name: /Jump to latest/i }).click()
+  await expect(page.locator(`[data-timeline-part-id="${followingID}"]`)).toBeVisible()
+  await page.waitForTimeout(600)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "jump-latest",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["shell", "following"] },
+      { type: "unique", regions: ["shell", "following"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 1 },
+      { type: "label-stability", regions: "all" },
+      { type: "acquire-bottom-anchor" },
+      { type: "flow", regions: ["shell", "following"] },
+    ]),
+  )
+})
+
+test("handles a single row taller than the viewport", async ({ page }, testInfo) => {
+  const shellID = "prt_tall_01_shell"
+  const followingID = "prt_tall_02_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([shell(shellID, "running"), textPart(followingID, "After tall row")], { completed: false }),
+    ],
+    settings: { shellToolPartsExpanded: true },
+    viewport: { width: 900, height: 360 },
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  const regions = defineVisualRegions({
+    shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partUpdated(shell(shellID, "completed", lines(100))), 700)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "taller-than-viewport",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["shell", "following"] },
+      { type: "unique", regions: ["shell", "following"] },
+      { type: "stable", regions: ["shell", "following"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 0 },
+      { type: "label-stability", regions: "all" },
+      { type: "preserve-bottom-anchor" },
+      { type: "flow", regions: ["shell", "following"] },
+    ]),
+  )
+})
+
+function history(count: number): TimelineMessage[] {
+  return Array.from({ length: count }, (_, index) => {
+    const prefix = `msg_${String(index).padStart(4, "0")}_scroll`
+    const userID = `${prefix}_a_user`
+    return [
+      userMessage(undefined, { id: userID, created: 1690000000000 + index * 10_000 }),
+      assistantMessage(
+        [textPart(`prt_${String(index).padStart(4, "0")}_scroll`, `History ${index}. ${"content ".repeat(30)}`)],
+        {
+          id: `${prefix}_b_assistant`,
+          parentID: userID,
+          created: 1690000001000 + index * 10_000,
+        },
+      ),
+    ]
+  }).flat()
+}
+
+function lines(count: number) {
+  return Array.from({ length: count }, (_, index) => `line ${index + 1}`).join("\n")
+}
+
+function rowPairPlan(
+  regions: Record<"shell" | "following", { selector: string; closest?: string }>,
+  maxPositionReversals: number,
+) {
+  return visualPlan(regions, [
+    { type: "required", regions: ["shell", "following"] },
+    { type: "unique", regions: ["shell", "following"] },
+    { type: "stable", regions: ["shell", "following"] },
+    { type: "opacity", regions: "all" },
+    { type: "continuity", regions: "all" },
+    { type: "motion", regions: "all", maxPositionReversals },
+    { type: "label-stability", regions: "all" },
+    { type: "flow", regions: ["shell", "following"] },
+  ])
+}
+
+function anchorPlan(regions: Record<"anchor", { selector: string; closest?: string }>) {
+  return visualPlan(regions, [
+    { type: "required", regions: ["anchor"] },
+    { type: "unique", regions: ["anchor"] },
+    { type: "stable", regions: ["anchor"] },
+    { type: "fixed", regions: ["anchor"] },
+    { type: "opacity", regions: "all" },
+    { type: "continuity", regions: "all" },
+    { type: "motion", regions: "all", maxPositionReversals: 0 },
+    { type: "label-stability", regions: "all" },
+  ])
+}

packages/app/e2e/performance/timeline-stability/shell-matrix.spec.ts

@@ -0,0 +1,255 @@
+import { test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  partUpdated,
+  setupTimeline,
+  shell,
+  textPart,
+  userMessage,
+  waitForVisualSettle,
+} from "./fixture"
+
+const profiles = [
+  {
+    name: "empty running to completed",
+    updates: [{ state: "completed" as const, output: "", delay: 350 }],
+  },
+  {
+    name: "50 lines arriving incrementally",
+    updates: [
+      { state: "running" as const, output: lines(1), delay: 100 },
+      { state: "running" as const, output: lines(10), delay: 160 },
+      { state: "running" as const, output: lines(25), delay: 90 },
+      { state: "running" as const, output: lines(50), delay: 220 },
+      { state: "completed" as const, output: lines(50), delay: 500 },
+    ],
+  },
+  {
+    name: "wide ANSI and CRLF output",
+    updates: [
+      {
+        state: "running" as const,
+        output: Array.from({ length: 20 }, (_, index) => `\u001b[32mline ${index}\u001b[0m ${"wide-".repeat(30)}`).join(
+          "\r\n",
+        ),
+        delay: 240,
+      },
+      {
+        state: "completed" as const,
+        output: Array.from({ length: 20 }, (_, index) => `line ${index} ${"wide-".repeat(30)}`).join("\n"),
+        delay: 500,
+      },
+    ],
+  },
+] as const
+
+for (const profile of profiles) {
+  test(`keeps rows stable for shell ${profile.name}`, async ({ page }, testInfo) => {
+    const shellID = `prt_matrix_${profiles.indexOf(profile)}_01_shell`
+    const followingID = `prt_matrix_${profiles.indexOf(profile)}_02_following`
+    const timeline = await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage([shell(shellID, "running"), textPart(followingID, "Following shell row")], {
+          completed: false,
+        }),
+      ],
+      settings: { shellToolPartsExpanded: true },
+      cpuRate: 4,
+      seedHistory: true,
+    })
+    const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+    await scroller.evaluate((element) => (element.scrollTop = element.scrollHeight))
+    await waitForVisualSettle(page, [
+      `[data-timeline-part-id="${shellID}"]`,
+      `[data-timeline-part-id="${followingID}"]`,
+    ])
+    const regions = defineVisualRegions({
+      shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: `[data-timeline-part-id="${followingID}"]`,
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    for (const update of profile.updates) {
+      await timeline.send(partUpdated(shell(shellID, update.state, update.output)), update.delay)
+    }
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      `shell-${profiles.indexOf(profile)}`,
+      trace,
+      visualPlan(
+        regions,
+        [
+          { type: "required", regions: ["shell", "following"] },
+          { type: "unique", regions: ["shell", "following"] },
+          { type: "stable", regions: ["shell", "following"] },
+          { type: "opacity", regions: "all" },
+          { type: "continuity", regions: "all" },
+          { type: "motion", regions: "all", maxPositionReversals: 0, maxReversals: 1 },
+          { type: "label-stability", regions: "all" },
+          { type: "preserve-bottom-anchor" },
+          { type: "flow", regions: ["shell", "following"] },
+        ],
+        { perMarker: true },
+      ),
+    )
+  })
+}
+
+test("keeps following row stable when a collapsed shell receives 50 lines", async ({ page }, testInfo) => {
+  const shellID = "prt_matrix_collapsed_01_shell"
+  const followingID = "prt_matrix_collapsed_02_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([shell(shellID, "running"), textPart(followingID, "Following collapsed shell")], {
+        completed: false,
+      }),
+    ],
+    settings: { shellToolPartsExpanded: false },
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  await waitForVisualSettle(page, [`[data-timeline-part-id="${shellID}"]`, `[data-timeline-part-id="${followingID}"]`])
+  const regions = defineVisualRegions({
+    shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partUpdated(shell(shellID, "running", lines(50))), 240)
+  await timeline.send(partUpdated(shell(shellID, "completed", lines(50))), 500)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "collapsed-shell",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["shell", "following"] },
+        { type: "unique", regions: ["shell", "following"] },
+        { type: "stable", regions: ["shell", "following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: ["following"], maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+        { type: "flow", regions: ["shell", "following"] },
+      ],
+      { perMarker: true },
+    ),
+  )
+})
+
+test("keeps rows stable when a running shell becomes an error", async ({ page }, testInfo) => {
+  const shellID = "prt_matrix_error_01_shell"
+  const followingID = "prt_matrix_error_02_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([shell(shellID, "running", lines(10)), textPart(followingID, "Following failed shell")], {
+        completed: false,
+      }),
+    ],
+    settings: { shellToolPartsExpanded: true },
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  await waitForVisualSettle(page, [`[data-timeline-part-id="${shellID}"]`, `[data-timeline-part-id="${followingID}"]`])
+  const regions = defineVisualRegions({
+    shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    partUpdated({
+      ...shell(shellID, "error"),
+      state: {
+        status: "error",
+        input: { command: `echo ${shellID}` },
+        error: "Command failed after output",
+        metadata: {},
+        time: { start: 1700000001000, end: 1700000002000 },
+      },
+    }),
+    500,
+  )
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "shell-error",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["shell", "following"] },
+        { type: "unique", regions: ["shell", "following"] },
+        { type: "stable", regions: ["shell", "following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: ["following"], maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+        { type: "preserve-bottom-anchor" },
+        { type: "flow", regions: ["shell", "following"] },
+      ],
+      { perMarker: true },
+    ),
+  )
+})
+
+test("keeps rows stable when later text arrives before shell output", async ({ page }, testInfo) => {
+  const shellID = "prt_late_text_01_shell"
+  const followingID = "prt_late_text_02_following"
+  const timeline = await setupTimeline(page, {
+    messages: [userMessage(), assistantMessage([shell(shellID, "running")], { completed: false })],
+    settings: { shellToolPartsExpanded: true },
+    cpuRate: 4,
+    seedHistory: true,
+  })
+  await waitForVisualSettle(page, [`[data-timeline-part-id="${shellID}"]`])
+  const regions = defineVisualRegions({
+    shell: { selector: `[data-timeline-part-id="${shellID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: {
+      selector: `[data-timeline-part-id="${followingID}"]`,
+      closest: '[data-timeline-row="AssistantPart"]',
+    },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partUpdated(textPart(followingID, "Later assistant content arrived before shell output.")), 240)
+  await timeline.send(partUpdated(shell(shellID, "running", lines(20))), 300)
+  await timeline.send(partUpdated(shell(shellID, "completed", lines(20))), 600)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "late-text-before-shell-output",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["shell", "following"] },
+        { type: "unique", regions: ["shell", "following"] },
+        { type: "stable", regions: ["shell"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+        { type: "preserve-bottom-anchor" },
+        { type: "flow", regions: ["shell", "following"] },
+      ],
+      { perMarker: true },
+    ),
+  )
+})
+
+function lines(count: number) {
+  return Array.from({ length: count }, (_, index) => `line ${index + 1}`).join("\n")
+}

packages/app/e2e/performance/timeline-stability/tool-mutation.spec.ts

@@ -0,0 +1,106 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  partUpdated,
+  session,
+  sessionID,
+  setupTimeline,
+  textPart,
+  toolPart,
+  userMessage,
+} from "./fixture"
+
+test("adds a task child-session link without replacing the task row", async ({ page }, testInfo) => {
+  const taskID = "prt_task_link"
+  const childID = "ses_task_child"
+  const input = { description: "Inspect child", subagent_type: "explore" }
+  const timeline = await setupTimeline(page, {
+    messages: [userMessage(), assistantMessage([toolPart(taskID, "task", "running", input)], { completed: false })],
+    sessions: [session(), session({ id: childID, parentID: sessionID, title: "Inspect child" })],
+    cpuRate: 4,
+  })
+  const regions = defineVisualRegions({
+    task: { selector: `[data-timeline-part-id="${taskID}"] [data-slot="collapsible-trigger"]` },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    partUpdated(toolPart(taskID, "task", "completed", input, { metadata: { sessionId: childID } })),
+    500,
+  )
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "task-link",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["task"] },
+      { type: "unique", regions: ["task"] },
+      { type: "stable", regions: ["task"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 0 },
+      { type: "label-stability", regions: "all" },
+    ]),
+  )
+  await expect(
+    page.locator(`a[href$="/session/${childID}"]`, { has: page.locator('[data-component="task-tool-card"]') }),
+  ).toBeVisible()
+})
+
+test("changes generic tool arguments without replacing the row", async ({ page }, testInfo) => {
+  const toolID = "prt_generic_mutation"
+  const followingID = "prt_generic_mutation_following"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage(
+        [
+          toolPart(toolID, "mcp_probe", "running", { target: "one", count: 1 }),
+          textPart(followingID, "Following generic tool"),
+        ],
+        { completed: false },
+      ),
+    ],
+    cpuRate: 4,
+  })
+  const regions = defineVisualRegions({
+    tool: { selector: `[data-timeline-part-id="${toolID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    partUpdated(toolPart(toolID, "mcp_probe", "running", { target: "two", count: 2, mode: "deep" })),
+    200,
+  )
+  await timeline.send(
+    partUpdated(toolPart(toolID, "mcp_probe", "completed", { target: "two", count: 2, mode: "deep" })),
+    400,
+  )
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "generic-mutation",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["tool", "following"] },
+        { type: "unique", regions: ["tool", "following"] },
+        { type: "stable", regions: ["tool", "following"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+        { type: "flow", regions: ["tool", "following"] },
+      ],
+      { perMarker: true },
+    ),
+  )
+})

packages/app/e2e/performance/timeline-stability/tools.spec.ts

@@ -0,0 +1,198 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantMessage,
+  directory,
+  partUpdated,
+  session,
+  sessionID,
+  setupTimeline,
+  status,
+  textPart,
+  toolPart,
+  userMessage,
+} from "./fixture"
+
+test.describe("timeline tool state stability", () => {
+  test("moves lightweight tools through pending, running, and completed without replacing rows", async ({
+    page,
+  }, testInfo) => {
+    const ids = ["webfetch", "websearch", "task", "skill", "custom"] as const
+    const inputs = {
+      webfetch: { url: "https://example.com/docs" },
+      websearch: { query: "timeline stability" },
+      task: { description: "Inspect timeline", subagent_type: "explore" },
+      skill: { name: "stability" },
+      custom: { target: "timeline", depth: 2 },
+    }
+    const names = { webfetch: "webfetch", websearch: "websearch", task: "task", skill: "skill", custom: "mcp_probe" }
+    const questionID = "prt_state_question"
+    const todoID = "prt_state_todo"
+    const initial = [
+      ...ids.map((id) => toolPart(`prt_state_${id}`, names[id], "pending", inputs[id])),
+      toolPart(questionID, "question", "pending", questionInput()),
+      toolPart(todoID, "todowrite", "pending", { todos: [{ content: "Hidden", status: "pending" }] }),
+      textPart("prt_state_following", "Following lightweight tools"),
+    ]
+    const childID = "ses_timeline_child"
+    const timeline = await setupTimeline(page, {
+      messages: [userMessage(), assistantMessage(initial, { completed: false })],
+      sessions: [session(), session({ id: childID, parentID: sessionID, title: "Inspect timeline" })],
+      cpuRate: 4,
+    })
+    await timeline.send(status("busy"), 120)
+    for (const id of ids) await timeline.waitForPart(`prt_state_${id}`)
+    await expect(page.locator(`[data-timeline-part-id="${questionID}"]`)).toHaveCount(0)
+    await expect(page.locator(`[data-timeline-part-id="${todoID}"]`)).toHaveCount(0)
+
+    const regionIDs = [
+      "prt_state_webfetch",
+      "prt_state_websearch",
+      "prt_state_task",
+      "prt_state_skill",
+      "prt_state_custom",
+    ] as const
+    const regions = defineVisualRegions({
+      prt_state_webfetch: toolRegion(regionIDs[0]),
+      prt_state_websearch: toolRegion(regionIDs[1]),
+      prt_state_task: toolRegion(regionIDs[2]),
+      prt_state_skill: toolRegion(regionIDs[3]),
+      prt_state_custom: toolRegion(regionIDs[4]),
+    })
+    await startVisualProbe(page, regions)
+    for (const [index, id] of ids.entries()) {
+      await timeline.send(
+        partUpdated(toolPart(`prt_state_${id}`, names[id], "running", inputs[id])),
+        [80, 240, 100, 360, 140][index],
+      )
+    }
+    for (const [index, id] of ["skill", "webfetch", "custom", "task", "websearch"].entries()) {
+      const key = id as (typeof ids)[number]
+      const metadata = key === "task" ? { sessionId: childID } : key === "websearch" ? { provider: "exa" } : {}
+      const output = key === "websearch" ? "Result https://example.com/result" : "Completed"
+      await timeline.send(
+        partUpdated(toolPart(`prt_state_${key}`, names[key], "completed", inputs[key], { metadata, output })),
+        [110, 70, 280, 130, 420][index],
+      )
+    }
+    await timeline.send(
+      partUpdated(
+        toolPart(questionID, "question", "completed", questionInput(), { metadata: { answers: [["Keep it stable"]] } }),
+      ),
+      350,
+    )
+    await timeline.waitForPart(questionID)
+    await timeline.send(status("idle"), 500)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      "lightweight-tools",
+      trace,
+      visualPlan(regions, [
+        { type: "required", regions: regionIDs },
+        { type: "unique", regions: regionIDs },
+        { type: "stable", regions: regionIDs },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxReversals: 4 },
+        { type: "label-stability", regions: "all" },
+      ]),
+    )
+    await expect(page.locator(`[data-timeline-part-id="${questionID}"]`)).toContainText("Keep it stable")
+    await expect(page.locator(`[data-timeline-part-id="${todoID}"]`)).toHaveCount(0)
+    await expect(
+      page.locator(`a[href$="/session/${childID}"]`, { has: page.locator('[data-component="task-tool-card"]') }),
+    ).toBeVisible()
+    await expect(page.getByRole("button", { name: /Exa Web Search/ })).toBeVisible()
+  })
+
+  test("keeps an expanded mixed context group stable through staggered completion and error", async ({
+    page,
+  }, testInfo) => {
+    const ids = ["prt_ctx_01_read", "prt_ctx_02_glob", "prt_ctx_03_grep", "prt_ctx_04_list"]
+    const tools = ["read", "glob", "grep", "list"]
+    const inputs = [
+      { filePath: "src/a.ts", offset: 0, limit: 120 },
+      { path: directory, pattern: "**/*.ts" },
+      { path: directory, pattern: "stability", include: "*.ts" },
+      { path: "src" },
+    ]
+    const context = ids.map((id, index) => toolPart(id, tools[index]!, "pending", inputs[index]!))
+    const timeline = await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage([...context, textPart("prt_ctx_following", "Following context")], { completed: false }),
+      ],
+      cpuRate: 4,
+    })
+    await timeline.send(status("busy"), 100)
+    const groupSelector = `[data-timeline-part-ids="${ids.join(",")}"]`
+    const group = page.locator(groupSelector)
+    await expect(group).toBeVisible()
+    await group.locator('[data-slot="collapsible-trigger"]').click()
+    await expect(group.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "true")
+
+    const regions = defineVisualRegions({
+      status: {
+        selector: `${groupSelector} [data-component="tool-status-title"]`,
+        opacitySelectors: ['[data-slot="tool-status-active"]', '[data-slot="tool-status-done"]'],
+      },
+      context: { selector: groupSelector, closest: '[data-timeline-row="AssistantPart"]' },
+      following: {
+        selector: '[data-timeline-part-id="prt_ctx_following"]',
+        closest: '[data-timeline-row="AssistantPart"]',
+      },
+    })
+    await startVisualProbe(page, regions)
+    for (const [index, delay] of [90, 260, 70, 380].entries()) {
+      await timeline.send(partUpdated(toolPart(ids[index]!, tools[index]!, "running", inputs[index]!)), delay)
+    }
+    await timeline.send(partUpdated(toolPart(ids[1]!, tools[1]!, "completed", inputs[1]!)), 130)
+    await timeline.send(partUpdated(toolPart(ids[3]!, tools[3]!, "completed", inputs[3]!)), 210)
+    await timeline.send(
+      partUpdated(toolPart(ids[0]!, tools[0]!, "error", inputs[0]!, { error: "Read interrupted" })),
+      110,
+    )
+    await timeline.send(partUpdated(toolPart(ids[2]!, tools[2]!, "completed", inputs[2]!)), 250)
+    await expect(group.locator('[data-component="tool-status-title"]')).toHaveAttribute("aria-label", "Explored")
+    await timeline.send(status("idle"), 700)
+    const trace = await stopVisualProbe<keyof typeof regions>(page)
+    await reportVisualStability(
+      testInfo,
+      "mixed-context",
+      trace,
+      visualPlan(regions, [
+        { type: "required", regions: ["context", "following"] },
+        { type: "unique", regions: ["context"] },
+        { type: "stable", regions: ["context"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxReversals: 4 },
+        { type: "label-stability", regions: "all" },
+        { type: "flow", regions: ["context", "following"] },
+      ]),
+    )
+    await expect(group.locator('[data-component="tool-status-title"]')).toHaveAttribute("aria-label", "Explored")
+    await expect(group.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "true")
+    await group.locator('[data-slot="collapsible-trigger"]').click()
+    await expect(group.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "false")
+    await timeline.send(partUpdated(textPart("prt_ctx_late_sibling", "Later sibling content")), 200)
+    await expect(group.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "false")
+    await group.locator('[data-slot="collapsible-trigger"]').click()
+    await expect(group.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "true")
+  })
+})
+
+function questionInput() {
+  return { questions: [{ header: "Stability", question: "Keep it stable?", options: [] }] }
+}
+
+function toolRegion(id: string) {
+  return { selector: `[data-timeline-part-id="${id}"]`, closest: '[data-timeline-row="AssistantPart"]' }
+}

packages/app/e2e/performance/timeline-stability/transition-matrix.spec.ts

@@ -0,0 +1,272 @@
+import { expect, test } from "@playwright/test"
+import {
+  defineVisualRegions,
+  reportVisualStability,
+  startVisualProbe,
+  stopVisualProbe,
+  visualPlan,
+} from "../../utils/visual-stability"
+import {
+  assistantID,
+  assistantMessage,
+  completedAssistantInfo,
+  event,
+  messageUpdated,
+  partDelta,
+  partUpdated,
+  setupTimeline,
+  shell,
+  status,
+  textPart,
+  toolPart,
+  userMessage,
+} from "./fixture"
+
+test("keeps unchanged siblings stable while a middle part is inserted and removed", async ({ page }, testInfo) => {
+  const firstID = "prt_mutation_01_first"
+  const middleID = "prt_mutation_02_middle"
+  const lastID = "prt_mutation_03_last"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage([textPart(firstID, "First stable row"), textPart(lastID, "Last stable row")], {
+        completed: false,
+      }),
+    ],
+    cpuRate: 4,
+  })
+  const regions = defineVisualRegions({
+    first: { selector: `[data-timeline-part-id="${firstID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    last: { selector: `[data-timeline-part-id="${lastID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partUpdated(textPart(middleID, "Inserted middle row. ".repeat(12))), 350)
+  await expect(page.locator(`[data-timeline-part-id="${middleID}"]`)).toBeVisible()
+  await timeline.send(
+    event("message.part.removed", { sessionID: "ses_timeline_stability", messageID: assistantID, partID: middleID }),
+    500,
+  )
+  await expect(page.locator(`[data-timeline-part-id="${middleID}"]`)).toHaveCount(0)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(testInfo, "middle-insert-remove", trace, stablePairPlan(regions, 1))
+})
+
+test("streams text through growth, canonical replacement, and completion", async ({ page }, testInfo) => {
+  const textID = "prt_text_reconcile"
+  const followingID = "prt_text_reconcile_following"
+  const assistant = assistantMessage([textPart(textID, "Starting"), textPart(followingID, "Following text row")], {
+    completed: false,
+  })
+  const timeline = await setupTimeline(page, { messages: [userMessage(), assistant], cpuRate: 4 })
+  const regions = defineVisualRegions({
+    text: { selector: `[data-timeline-part-id="${textID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    following: { selector: `[data-timeline-part-id="${followingID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(partDelta(textID, " streamed content"), 100)
+  await timeline.send(partDelta(textID, "\n\n- item one\n- item two\n- item three"), 180)
+  await timeline.send(partUpdated(textPart(textID, "Canonical replacement with a shorter final paragraph.")), 200)
+  await timeline.send(messageUpdated(completedAssistantInfo(assistant.info)), 500)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "text-reconcile",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["text", "following"] },
+      { type: "unique", regions: ["text", "following"] },
+      { type: "stable", regions: ["text", "following"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all", maxPositionReversals: 1, maxReversals: 2 },
+      { type: "label-stability", regions: "all" },
+      { type: "preserve-bottom-anchor" },
+      { type: "flow", regions: ["text", "following"] },
+    ]),
+  )
+})
+
+test("inserts a completed question between stable rows", async ({ page }, testInfo) => {
+  const firstID = "prt_question_01_first"
+  const questionID = "prt_question_02_hidden"
+  const lastID = "prt_question_03_last"
+  const input = { questions: [{ header: "Choice", question: "Keep stable?", options: [] }] }
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(),
+      assistantMessage(
+        [
+          textPart(firstID, "Before question"),
+          toolPart(questionID, "question", "running", input),
+          textPart(lastID, "After question"),
+        ],
+        { completed: false },
+      ),
+    ],
+    cpuRate: 4,
+  })
+  await expect(page.locator(`[data-timeline-part-id="${questionID}"]`)).toHaveCount(0)
+  const regions = defineVisualRegions({
+    first: { selector: `[data-timeline-part-id="${firstID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+    last: { selector: `[data-timeline-part-id="${lastID}"]`, closest: '[data-timeline-row="AssistantPart"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    partUpdated(toolPart(questionID, "question", "completed", input, { metadata: { answers: [["Yes"]] } })),
+    600,
+  )
+  await expect(page.locator(`[data-timeline-part-id="${questionID}"]`)).toBeVisible()
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(testInfo, "question-insert", trace, stablePairPlan(regions, 0))
+})
+
+test("replaces thinking with an assistant error without a blank turn", async ({ page }, testInfo) => {
+  const assistant = assistantMessage([], { completed: false })
+  const timeline = await setupTimeline(page, { messages: [userMessage(), assistant], cpuRate: 4 })
+  await timeline.send(status("busy"), 150)
+  await expect(page.locator('[data-timeline-row="Thinking"]')).toBeVisible()
+  const regions = defineVisualRegions({
+    thinking: { selector: '[data-timeline-row="Thinking"]' },
+    error: { selector: '[data-timeline-row="Error"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    messageUpdated({
+      ...assistant.info,
+      error: { name: "APIError", data: { message: "Provider failed visibly", isRetryable: false } },
+    }),
+    500,
+  )
+  await expect(page.locator('[data-timeline-row="Thinking"]')).toHaveCount(0)
+  await expect(page.locator('[data-timeline-row="Error"]')).toContainText("Provider failed visibly")
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "thinking-error",
+    trace,
+    visualPlan(regions, [
+      { type: "required", regions: ["thinking", "error"] },
+      { type: "continuous-any", regions: ["thinking", "error"] },
+      { type: "unique", regions: ["thinking", "error"] },
+      { type: "opacity", regions: "all" },
+      { type: "continuity", regions: "all" },
+      { type: "motion", regions: "all" },
+      { type: "label-stability", regions: "all" },
+    ]),
+  )
+})
+
+test("updates retry attempts and long provider messages without remounting the retry row", async ({
+  page,
+}, testInfo) => {
+  const timeline = await setupTimeline(page, {
+    messages: [userMessage(), assistantMessage([], { completed: false })],
+    cpuRate: 4,
+  })
+  await timeline.send(status("retry", 1), 120)
+  await expect(page.locator('[data-timeline-row="Retry"]')).toBeVisible()
+  const regions = defineVisualRegions({
+    retry: { selector: '[data-timeline-row="Retry"]' },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    event("session.status", {
+      sessionID: "ses_timeline_stability",
+      status: {
+        type: "retry",
+        attempt: 2,
+        message: "A very long provider retry message ".repeat(8),
+        next: Date.now() + 10_000,
+      },
+    }),
+    300,
+  )
+  await timeline.send(status("retry", 3), 300)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "retry-evolution",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["retry"] },
+        { type: "unique", regions: ["retry"] },
+        { type: "stable", regions: ["retry"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+      ],
+      { perMarker: true },
+    ),
+  )
+})
+
+test("reducer-hardening: removes a historical turn one message at a time without moving a visible lower anchor twice", async ({
+  page,
+}, testInfo) => {
+  const removeUserID = "msg_0500_remove_user"
+  const removeAssistantID = "msg_0501_remove_assistant"
+  const anchorUserID = "msg_2000_anchor_user"
+  const timeline = await setupTimeline(page, {
+    messages: [
+      userMessage(undefined, { id: removeUserID, created: 1690000000000 }),
+      assistantMessage([textPart("prt_remove_text", "Removed historical content. ".repeat(15))], {
+        id: removeAssistantID,
+        parentID: removeUserID,
+        created: 1690000001000,
+      }),
+      userMessage(undefined, { id: anchorUserID, created: 1700000000000 }),
+      assistantMessage([textPart("prt_anchor_text", "Visible anchor response")], {
+        id: "msg_2001_anchor_assistant",
+        parentID: anchorUserID,
+        created: 1700000001000,
+      }),
+    ],
+    cpuRate: 4,
+  })
+  const regions = defineVisualRegions({
+    anchor: { selector: `[data-timeline-row="UserMessage"][data-message-id="${anchorUserID}"]` },
+  })
+  await startVisualProbe(page, regions)
+  await timeline.send(
+    event("message.removed", { sessionID: "ses_timeline_stability", messageID: removeAssistantID }),
+    200,
+  )
+  await timeline.send(event("message.removed", { sessionID: "ses_timeline_stability", messageID: removeUserID }), 500)
+  const trace = await stopVisualProbe<keyof typeof regions>(page)
+  await reportVisualStability(
+    testInfo,
+    "historical-turn-remove",
+    trace,
+    visualPlan(
+      regions,
+      [
+        { type: "required", regions: ["anchor"] },
+        { type: "unique", regions: ["anchor"] },
+        { type: "stable", regions: ["anchor"] },
+        { type: "opacity", regions: "all" },
+        { type: "continuity", regions: "all" },
+        { type: "motion", regions: "all", maxPositionReversals: 0 },
+        { type: "label-stability", regions: "all" },
+      ],
+      { perMarker: true },
+    ),
+  )
+})
+
+function stablePairPlan(
+  regions: Record<"first" | "last", { selector: string; closest?: string }>,
+  maxPositionReversals: number,
+) {
+  return visualPlan(regions, [
+    { type: "required", regions: ["first", "last"] },
+    { type: "unique", regions: ["first", "last"] },
+    { type: "stable", regions: ["first", "last"] },
+    { type: "opacity", regions: "all" },
+    { type: "continuity", regions: "all" },
+    { type: "motion", regions: "all", maxPositionReversals },
+    { type: "label-stability", regions: "all" },
+  ])
+}

packages/app/e2e/performance/timeline/review-pane-scaling-benchmark.spec.ts

@@ -0,0 +1,312 @@
+import type { Page } from "@playwright/test"
+import { benchmark, expect } from "../benchmark"
+import { setupTimelineBenchmark } from "./session-timeline-benchmark.fixture"
+
+const changedLinesPerFile = 100
+const linesPerSide = changedLinesPerFile / 2
+const fileCounts = [1, 10, 100, 1_000, 10_000]
+const filesPerDirectory = 100
+const readyFrames = 3
+const completionTimeoutMs = Number(process.env.REVIEW_PANE_COMPLETION_TIMEOUT_MS ?? 900_000)
+
+type ReviewPaneScalingSample = {
+  observedAtMs: number
+  logicalRows: number
+  treeRows: number
+  fileRows: number
+  diffLines: number
+  header: string
+  ready: boolean
+}
+
+type ReviewPaneScalingProbe = {
+  startedAt?: number
+  firstTreeRowMs?: number
+  logicalTreeReadyMs?: number
+  firstDiffRenderMs?: number
+  stableReadyMs?: number
+  samples: ReviewPaneScalingSample[]
+  frameTimesMs: number[]
+  longTasks: { startTime: number; duration: number }[]
+  stop: () => void
+}
+
+benchmark.describe("performance: review pane scaling", () => {
+  for (const fileCount of fileCounts) {
+    const changedLines = fileCount * changedLinesPerFile
+
+    benchmark(
+      `${changedLines} changed lines across ${fileCount} ${fileCount === 1 ? "file" : "files"}`,
+      async ({ page, report }) => {
+        benchmark.setTimeout(1_200_000)
+        await page.emulateMedia({ reducedMotion: "reduce" })
+
+        const patchByteLimit = Number(process.env.REVIEW_PANE_PATCH_BYTE_LIMIT ?? Number.POSITIVE_INFINITY)
+        if (Number.isNaN(patchByteLimit) || patchByteLimit < 0)
+          throw new Error(`Invalid REVIEW_PANE_PATCH_BYTE_LIMIT: ${process.env.REVIEW_PANE_PATCH_BYTE_LIMIT}`)
+        const responseBody = JSON.stringify(createScalingDiffs(fileCount, patchByteLimit))
+        await setupTimelineBenchmark(page, {
+          historyTurns: 0,
+          eventBatch: 1,
+          newLayoutDesigns: true,
+        })
+        await page.route("**/vcs/diff**", (route) =>
+          route.fulfill({
+            status: 200,
+            contentType: "application/json",
+            headers: { "access-control-allow-origin": "*" },
+            body: responseBody,
+          }),
+        )
+
+        const expectedRows = fileCount + 2 + Math.ceil(fileCount / filesPerDirectory)
+        const metrics = await measureReviewPaneLoad(page, {
+          expectedFile: reviewFile(0),
+          expectedRows,
+        })
+        const search = await measureBroadReviewSearch(page, fileCount)
+
+        expect(metrics.logicalRows).toBe(expectedRows)
+        expect(metrics.fileRows).toBeGreaterThan(0)
+        expect(metrics.treeRows).toBeGreaterThan(0)
+        expect(metrics.diffLines).toBeGreaterThan(0)
+        expect(search.logicalRows).toBe(fileCount)
+        expect(search.renderedRows).toBeGreaterThan(0)
+        report(
+          { ...metrics, search },
+          {
+            fileCount,
+            changedLinesPerFile,
+            changedLines,
+            additions: changedLines / 2,
+            deletions: changedLines / 2,
+            patchLines: changedLines,
+            patchByteLimit: Number.isFinite(patchByteLimit) ? patchByteLimit : null,
+            payloadBytes: new TextEncoder().encode(responseBody).byteLength,
+            expectedRows,
+          },
+        )
+      },
+    )
+  }
+})
+
+async function measureBroadReviewSearch(page: Page, expectedRows: number) {
+  const filter = page.getByRole("searchbox", { name: "Filter files" })
+  await filter.evaluate((element) => {
+    element.addEventListener(
+      "input",
+      () => {
+        ;(window as Window & { __reviewSearchStartedAt?: number }).__reviewSearchStartedAt = performance.now()
+      },
+      { once: true, capture: true },
+    )
+  })
+  await filter.fill("file-")
+
+  return page.evaluate((expectedRows) => {
+    const startedAt = (window as Window & { __reviewSearchStartedAt?: number }).__reviewSearchStartedAt!
+    return new Promise<{ stableMs: number; logicalRows: number; renderedRows: number }>((resolve) => {
+      let previous = -1
+      let streak = 0
+      const sample = () => {
+        const tree = document.querySelector<HTMLElement>('#review-panel [data-component="file-tree-v2"]')
+        const rows = [...document.querySelectorAll<HTMLElement>('#review-panel [data-slot="file-tree-v2-row"]')]
+        const logicalRows = Number(tree?.dataset.totalRows ?? rows.length)
+        const ready =
+          logicalRows === expectedRows && rows.length > 0 && rows.every((row) => row.textContent?.includes("file-"))
+        streak = ready && rows.length === previous ? streak + 1 : ready ? 1 : 0
+        previous = rows.length
+        if (streak >= 3) {
+          resolve({ stableMs: performance.now() - startedAt, logicalRows, renderedRows: rows.length })
+          return
+        }
+        requestAnimationFrame(sample)
+      }
+      requestAnimationFrame(sample)
+    })
+  }, expectedRows)
+}
+
+function createScalingDiffs(fileCount: number, patchByteLimit: number) {
+  const changes = Array.from({ length: linesPerSide }, (_, index) => {
+    const line = String(index).padStart(3, "0")
+    return `-export const value_${line} = "before"\n+export const value_${line} = "after"`
+  }).join("\n")
+  let patchBytes = 0
+  let capped = false
+
+  return Array.from({ length: fileCount }, (_, index) => {
+    const file = reviewFile(index)
+    const fullPatch = [
+      `diff --git a/${file} b/${file}`,
+      `--- a/${file}`,
+      `+++ b/${file}`,
+      `@@ -1,${linesPerSide} +1,${linesPerSide} @@`,
+      changes,
+    ].join("\n")
+    if (index === 0 && fullPatch.length > patchByteLimit)
+      throw new Error(`REVIEW_PANE_PATCH_BYTE_LIMIT must include the active patch (${fullPatch.length} bytes)`)
+    const patch = !capped && patchBytes + fullPatch.length <= patchByteLimit ? fullPatch : emptyReviewPatch(file)
+    if (patch === fullPatch) patchBytes += fullPatch.length
+    else capped = true
+    return {
+      file,
+      patch,
+      additions: linesPerSide,
+      deletions: linesPerSide,
+      status: "modified" as const,
+    }
+  })
+}
+
+function emptyReviewPatch(file: string) {
+  return [`diff --git a/${file} b/${file}`, `--- a/${file}`, `+++ b/${file}`].join("\n")
+}
+
+function reviewFile(index: number) {
+  return `src/review/d${String(Math.floor(index / filesPerDirectory)).padStart(5, "0")}/file-${String(index).padStart(5, "0")}.ts`
+}
+
+async function measureReviewPaneLoad(page: Page, input: { expectedFile: string; expectedRows: number }) {
+  const toggle = page.getByRole("button", { name: "Toggle review" })
+  await expect(toggle).toBeVisible()
+  await toggle.evaluate((element) => element.setAttribute("data-review-pane-scaling-toggle", ""))
+  await installReviewPaneScalingProbe(page, input)
+  await toggle.click()
+  await page.waitForFunction(
+    () =>
+      (window as Window & { __reviewPaneScalingProbe?: ReviewPaneScalingProbe }).__reviewPaneScalingProbe
+        ?.stableReadyMs !== undefined,
+    undefined,
+    { timeout: completionTimeoutMs },
+  )
+
+  return page.evaluate(() => {
+    const probe = (window as Window & { __reviewPaneScalingProbe?: ReviewPaneScalingProbe }).__reviewPaneScalingProbe!
+    probe.stop()
+    const startedAt = probe.startedAt!
+    const final = probe.samples.at(-1)!
+    const resources = performance
+      .getEntriesByType("resource")
+      .filter((entry) => entry.name.includes("/vcs/diff")) as PerformanceResourceTiming[]
+    const resource = resources.at(-1)
+    const longTasks = probe.longTasks.filter(
+      (entry) => entry.startTime >= startedAt && entry.startTime <= startedAt + probe.stableReadyMs!,
+    )
+    const frameGaps = probe.frameTimesMs.map((time, index) => time - (probe.frameTimesMs[index - 1] ?? 0))
+
+    return {
+      firstTreeRowMs: probe.firstTreeRowMs ?? null,
+      logicalTreeReadyMs: probe.logicalTreeReadyMs ?? null,
+      firstDiffRenderMs: probe.firstDiffRenderMs ?? null,
+      stableReadyMs: probe.stableReadyMs ?? null,
+      responseStartMs: resource ? resource.responseStart - startedAt : null,
+      responseEndMs: resource ? resource.responseEnd - startedAt : null,
+      responseToStableMs: resource ? probe.stableReadyMs! - (resource.responseEnd - startedAt) : null,
+      treeRows: final.treeRows,
+      logicalRows: final.logicalRows,
+      fileRows: final.fileRows,
+      diffLines: final.diffLines,
+      samples: probe.samples.length,
+      maxFrameGapMs: Math.max(0, ...frameGaps),
+      longTaskCount: longTasks.length,
+      longTaskTotalMs: longTasks.reduce((sum, entry) => sum + entry.duration, 0),
+      maxLongTaskMs: Math.max(0, ...longTasks.map((entry) => entry.duration)),
+    }
+  })
+}
+
+async function installReviewPaneScalingProbe(page: Page, input: { expectedFile: string; expectedRows: number }) {
+  await page.evaluate(
+    ({ expectedFile, expectedRows, stableFrames }) => {
+      let running = true
+      let readyStreak = 0
+      const basename = expectedFile.split("/").at(-1)!
+      const longTaskObserver = PerformanceObserver.supportedEntryTypes.includes("longtask")
+        ? new PerformanceObserver((list) => {
+            probe.longTasks.push(
+              ...list.getEntries().map((entry) => ({ startTime: entry.startTime, duration: entry.duration })),
+            )
+          })
+        : undefined
+      const probe: ReviewPaneScalingProbe = {
+        samples: [],
+        frameTimesMs: [],
+        longTasks: [],
+        stop: () => {
+          running = false
+          longTaskObserver?.disconnect()
+        },
+      }
+
+      const sample = (time: number) => {
+        if (!running || probe.startedAt === undefined) return
+        const panel = document.querySelector<HTMLElement>("#review-panel")
+        const tree = panel?.querySelector<HTMLElement>('[data-component="file-tree-v2"]')
+        const rows = panel?.querySelectorAll('[data-slot="file-tree-v2-row"]') ?? []
+        const fileRows = panel?.querySelectorAll('button[data-slot="file-tree-v2-row"]') ?? []
+        const header =
+          panel?.querySelector<HTMLElement>('[data-slot="session-review-v2-file-header"]')?.textContent?.trim() ?? ""
+        const viewers = panel
+          ? [...panel.querySelectorAll<HTMLElement>('[data-component="file"][data-mode="diff"]')]
+          : []
+        const diffLines = viewers.reduce(
+          (sum, viewer) =>
+            sum + (viewer.querySelector("diffs-container")?.shadowRoot?.querySelectorAll("[data-line]").length ?? 0),
+          0,
+        )
+        const observedAtMs = time - probe.startedAt
+        const logicalRows = Number(tree?.dataset.totalRows ?? rows.length)
+        const ready =
+          logicalRows === expectedRows &&
+          fileRows.length > 0 &&
+          header.includes(basename) &&
+          viewers.length === 1 &&
+          diffLines > 0
+        const previous = probe.samples.at(-1)
+        const stable =
+          ready &&
+          previous?.ready === true &&
+          previous.logicalRows === logicalRows &&
+          previous.treeRows === rows.length &&
+          previous.fileRows === fileRows.length &&
+          previous.diffLines === diffLines &&
+          previous.header === header
+
+        probe.frameTimesMs.push(observedAtMs)
+        probe.samples.push({
+          observedAtMs,
+          logicalRows,
+          treeRows: rows.length,
+          fileRows: fileRows.length,
+          diffLines,
+          header,
+          ready,
+        })
+        if (probe.firstTreeRowMs === undefined && rows.length > 0) probe.firstTreeRowMs = observedAtMs
+        if (probe.logicalTreeReadyMs === undefined && logicalRows === expectedRows)
+          probe.logicalTreeReadyMs = observedAtMs
+        if (probe.firstDiffRenderMs === undefined && diffLines > 0) probe.firstDiffRenderMs = observedAtMs
+        readyStreak = !ready ? 0 : stable ? readyStreak + 1 : 1
+        if (readyStreak === stableFrames) probe.stableReadyMs = observedAtMs
+        if (probe.stableReadyMs === undefined) requestAnimationFrame(sample)
+      }
+
+      longTaskObserver?.observe({ type: "longtask", buffered: true })
+      document.addEventListener(
+        "click",
+        (event) => {
+          const toggle = event.target instanceof Element ? event.target.closest("button") : undefined
+          if (!toggle?.hasAttribute("data-review-pane-scaling-toggle")) return
+          probe.startedAt = performance.now()
+          performance.mark("opencode.review-pane-scaling.click")
+          requestAnimationFrame(sample)
+        },
+        { capture: true, once: true },
+      )
+      ;(window as Window & { __reviewPaneScalingProbe?: ReviewPaneScalingProbe }).__reviewPaneScalingProbe = probe
+    },
+    { ...input, stableFrames: readyFrames },
+  )
+}

packages/app/e2e/performance/timeline/session-parent-hydration-benchmark.spec.ts

@@ -0,0 +1,172 @@
+import type { Page } from "@playwright/test"
+import { expectSessionTitle } from "../../utils/waits"
+import { mockOpenCodeServer } from "../../utils/mock-server"
+import { benchmark, expect, withBenchmarkPage } from "../benchmark"
+import { fixture } from "./session-timeline-stress.fixture"
+import { installStressSessionTabs, stressSessionHref } from "./timeline-test-helpers"
+import { measureSessionSwitch, waitForStableTimeline } from "./session-tab-switch-probe"
+
+type ParentHydrationBenchmarkMode = "natural" | "candidate"
+
+const mode = process.env.SESSION_PARENT_HYDRATION_BENCHMARK_MODE ?? "natural"
+if (mode !== "natural" && mode !== "candidate") throw new Error(`Unknown parent hydration benchmark mode: ${mode}`)
+const userID = "msg_parent_hydration_user"
+const user = {
+  ...fixture.messages[fixture.targetID][0]!,
+  info: { ...fixture.messages[fixture.targetID][0]!.info, id: userID, time: { created: 1700001000000 } },
+  parts: fixture.messages[fixture.targetID][0]!.parts.map((part, index) => ({
+    ...part,
+    id: `prt_parent_hydration_user_${index}`,
+    messageID: userID,
+  })),
+}
+const assistantSeed = fixture.messages[fixture.targetID][3]!
+const assistants = Array.from({ length: 14 }, (_, index) => {
+  const messageID = `msg_parent_hydration_${String(index).padStart(2, "0")}`
+  return {
+    ...assistantSeed,
+    info: {
+      ...assistantSeed.info,
+      id: messageID,
+      parentID: userID,
+      time: { created: 1700001001000 + index * 1_000, completed: 1700001001500 + index * 1_000 },
+    },
+    parts: assistantSeed.parts.map((part, partIndex) => ({
+      ...part,
+      id: `prt_parent_hydration_${String(index).padStart(2, "0")}_${partIndex}`,
+      messageID,
+    })),
+  }
+})
+const messages = [user, ...assistants]
+const target = fixture.sessions.find((session) => session.id === fixture.targetID)!
+const lastID = userID
+const lastAssistant = assistants.at(-1)!
+const lastPart = lastAssistant.parts.at(-1)!
+const lastPartID =
+  lastPart.type === "tool"
+    ? lastPart.id
+    : `${lastAssistant.info.id}:${lastPart.type}:${lastAssistant.parts.filter((part) => part.type === lastPart.type).length - 1}`
+
+benchmark("hydrates an orphaned latest turn after a cold session click", async ({ browser, report }, testInfo) => {
+  benchmark.setTimeout(180_000)
+  const results = [] as Awaited<ReturnType<typeof trial>>[]
+  for (let run = 0; run < 5; run++) {
+    results.push(
+      await withBenchmarkPage(
+        browser,
+        `session-parent-hydration-${mode}-${run}`,
+        (page) => trial(page, mode),
+        testInfo,
+      ),
+    )
+  }
+  const timing = results.map((result) => result.metrics.firstCorrectObservedMs!).sort((a, b) => a - b)
+  report(
+    {
+      results: results.map((result) => ({ ...result.metrics, historyGateCount: result.historyGateCount })),
+      summary: {
+        firstCorrectObservedMs: { min: timing[0], median: timing[2], max: timing.at(-1) },
+        blankSamples: results.map((result) => result.metrics.blankSamples),
+        requestCounts: {
+          list: results.map((result) => result.requestCounts.list),
+          parent: results.map((result) => result.requestCounts.parent),
+        },
+        historyGateCount: results.map((result) => result.historyGateCount),
+      },
+    },
+    { mode },
+  )
+})
+
+async function trial(page: Page, mode: ParentHydrationBenchmarkMode) {
+  const requests: { type: "list" | "parent"; before?: string }[] = []
+  const history = mode === "candidate" ? Promise.withResolvers<void>() : undefined
+  let historyGates = 0
+  await mockOpenCodeServer(page, {
+    sessions: fixture.sessions.filter((session) => session.id === fixture.sourceID),
+    provider: fixture.provider,
+    directory: fixture.directory,
+    project: fixture.project,
+    messageDelay: 50,
+    onMessages: (request) => {
+      if (request.sessionID === fixture.targetID && request.phase === "start")
+        requests.push({ type: "list", before: request.before })
+    },
+    beforeMessagesResponse: (request) => {
+      if (mode !== "candidate" || request.sessionID !== fixture.targetID || !request.before) return Promise.resolve()
+      historyGates++
+      return history!.promise
+    },
+    onMessage: (request) => {
+      if (request.sessionID === fixture.targetID && request.messageID === userID) requests.push({ type: "parent" })
+    },
+    message: (sessionID, messageID) => {
+      if (sessionID !== fixture.targetID || messageID !== userID) return
+      return user
+    },
+    pageMessages: (sessionID, limit, before) => {
+      const items = sessionID === fixture.targetID ? messages : fixture.messages[fixture.sourceID]
+      const end = before ? items.findIndex((message) => message.info.id === before) : items.length
+      const start = Math.max(0, end - limit)
+      return { items: items.slice(start, end), cursor: start > 0 ? items[start]!.info.id : undefined }
+    },
+  })
+  await page.route(`**/session/${fixture.targetID}`, (route) => {
+    const current = new URL(route.request().url()).pathname.startsWith("/api/")
+    return route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify(
+        current
+          ? {
+              data: {
+                ...target,
+                cost: 0,
+                tokens: { input: 0, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
+                location: { directory: target.directory },
+              },
+            }
+          : target,
+      ),
+    })
+  })
+  await installStressSessionTabs(page, { sessionIDs: [fixture.sourceID] })
+  await page.goto(stressSessionHref(fixture.sourceID))
+  await expectSessionTitle(page, fixture.expected.sourceTitle)
+  await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
+
+  const href = stressSessionHref(fixture.targetID)
+  await page.evaluate(
+    ({ href, title }) => {
+      const link = document.createElement("a")
+      link.id = "parent-hydration-target"
+      link.href = href
+      link.textContent = title
+      document.body.append(link)
+    },
+    { href, title: target.title },
+  )
+  const metrics = await measureSessionSwitch(page, {
+    destinationIDs: messages.map((message) => message.info.id),
+    sourceIDs: fixture.messages[fixture.sourceID].map((message) => message.info.id),
+    lastID,
+    requiredPartID: lastPartID,
+    requireBottomAnchor: false,
+    href,
+    switch: async () => {
+      await page.locator("#parent-hydration-target").click()
+      await expectSessionTitle(page, target.title)
+    },
+  }).finally(() => history?.resolve())
+  expect(metrics.firstCorrectObservedMs).not.toBeNull()
+  const requestCounts = {
+    list: requests.filter((request) => request.type === "list").length,
+    parent: requests.filter((request) => request.type === "parent").length,
+  }
+  if (mode === "candidate") {
+    expect(requestCounts.parent).toBe(0)
+    expect(historyGates).toBe(0)
+  }
+  return { metrics, requestCounts, historyGateCount: historyGates }
+}

packages/app/e2e/performance/timeline/session-tab-switch-benchmark.spec.ts

@@ -2,7 +2,13 @@ import type { Page } from "@playwright/test"
 import { expectSessionTitle } from "../../utils/waits"
 import { benchmark, expect, withBenchmarkPage } from "../benchmark"
 import { fixture } from "./session-timeline-stress.fixture"
-import { installStressSessionTabs, mockStressTimeline, stressSessionHref } from "./timeline-test-helpers"
+import {
+  createReviewDiffs,
+  installStressSessionTabs,
+  installTimelineSettings,
+  mockStressTimeline,
+  stressSessionHref,
+} from "./timeline-test-helpers"
 import { measureSessionSwitch, waitForStableTimeline } from "./session-tab-switch-probe"
 
 type Result = Awaited<ReturnType<typeof measureSessionSwitch>>
@@ -20,8 +26,41 @@ benchmark("benchmarks cold and hot session tab switching", async ({ browser, rep
   report({ results, summary: summarize(results) })
 })
 
-async function trial(page: Page, mode: "cold" | "hot") {
-  await mockStressTimeline(page)
+benchmark(
+  "benchmarks v2 session tab switching with and without the review pane",
+  async ({ browser, report }, testInfo) => {
+    benchmark.setTimeout(360_000)
+    const runs = Number(process.env.SESSION_TAB_SWITCH_RUNS ?? 5)
+    const results = {
+      closed: { cold: [] as Result[], hot: [] as Result[] },
+      open: { cold: [] as Result[], hot: [] as Result[] },
+    }
+    for (const reviewPane of ["closed", "open"] as const) {
+      for (const mode of ["cold", "hot"] as const) {
+        for (let run = 0; run < runs; run++) {
+          results[reviewPane][mode].push(
+            await withBenchmarkPage(
+              browser,
+              `session-tab-switch-v2-${reviewPane}-${mode}-${run}`,
+              (page) => trial(page, mode, { newLayoutDesigns: true, reviewPane }),
+              testInfo,
+            ),
+          )
+        }
+      }
+    }
+    report({ results, summary: summarizeReviewPane(results) }, { runs, reviewDiffs: createReviewDiffs().length })
+  },
+)
+
+async function trial(
+  page: Page,
+  mode: "cold" | "hot",
+  options?: { newLayoutDesigns?: boolean; reviewPane?: "closed" | "open" },
+) {
+  const reviewDiffs = options?.newLayoutDesigns ? createReviewDiffs() : undefined
+  await mockStressTimeline(page, { vcsDiff: reviewDiffs })
+  if (options?.newLayoutDesigns) await installTimelineSettings(page)
   await installStressSessionTabs(page)
   if (mode === "hot") {
     await page.goto(stressSessionHref(fixture.targetID))
@@ -33,6 +72,10 @@ async function trial(page: Page, mode: "cold" | "hot") {
     await expectSessionTitle(page, fixture.expected.sourceTitle)
   }
   await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
+  if (options?.reviewPane === "open") {
+    await openReviewPane(page)
+    await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
+  }
 
   const destinationIDs = fixture.messages[fixture.targetID].map((message) => message.info.id)
   const sourceIDs = fixture.messages[fixture.sourceID].map((message) => message.info.id)
@@ -70,6 +113,15 @@ function summarize(results: Record<"cold" | "hot", Result[]>) {
   )
 }
 
+function summarizeReviewPane(results: Record<"closed" | "open", Record<"cold" | "hot", Result[]>>) {
+  return Object.fromEntries(
+    Object.entries(results).map(([reviewPane, values]) => [
+      reviewPane,
+      summarize(values as Record<"cold" | "hot", Result[]>),
+    ]),
+  )
+}
+
 async function switchSession(page: Page, sessionID: string, title: string) {
   const href = stressSessionHref(sessionID)
   const tab = page.locator(`[data-slot="titlebar-tabs"] a[href="${href}"]`).first()
@@ -77,3 +129,16 @@ async function switchSession(page: Page, sessionID: string, title: string) {
   await tab.click()
   await expectSessionTitle(page, title)
 }
+
+async function openReviewPane(page: Page) {
+  await page.getByRole("button", { name: "Toggle review" }).click()
+  const panel = page.locator("#review-panel")
+  await expect(panel).toBeVisible()
+  // Text-based readiness works across review implementations; the legacy list mounts
+  // diff viewers lazily while V2 mounts the active preview eagerly.
+  await page.waitForFunction(() => {
+    const panel = document.querySelector<HTMLElement>("#review-panel")
+    const text = panel?.textContent ?? ""
+    return text.includes("generated-000.ts") && text.includes("+3")
+  })
+}

packages/app/e2e/performance/timeline/session-tab-switch-metrics.ts

@@ -4,7 +4,15 @@ export type SessionSwitchSample = {
   source: string[]
   hasVisibleRows: boolean
   last: boolean
+  requiredPartVisible?: boolean
+  bottomAnchorRequired?: boolean
   bottomErrorPx?: number
+  review?: {
+    fileHost: boolean
+    fileHostReplaced: boolean
+    header: string
+    replacedLevels: string[]
+  }
 }
 
 export function classifySessionSwitch(samples: SessionSwitchSample[]) {
@@ -23,6 +31,10 @@ export function classifySessionSwitch(samples: SessionSwitchSample[]) {
       (sample) => sample.hasVisibleRows && sample.destination.length === 0 && sample.source.length === 0,
     ).length,
     sourceSamples: samples.filter((sample) => sample.source.length > 0).length,
+    reviewFileHostMissingSamples: samples.filter((sample) => sample.review && !sample.review.fileHost).length,
+    reviewFileHostReplacedSamples: samples.filter((sample) => sample.review?.fileHostReplaced).length,
+    reviewHeaders: [...new Set(samples.flatMap((sample) => (sample.review ? [sample.review.header] : [])))],
+    reviewReplacedLevels: [...new Set(samples.flatMap((sample) => sample.review?.replacedLevels ?? []))],
   }
 }
 
@@ -31,7 +43,8 @@ export function isCorrectDestination(sample: SessionSwitchSample) {
     sample.destination.length > 0 &&
     sample.source.length === 0 &&
     sample.last &&
-    Math.abs(sample.bottomErrorPx ?? Infinity) <= 1
+    sample.requiredPartVisible !== false &&
+    (sample.bottomAnchorRequired === false || Math.abs(sample.bottomErrorPx ?? Infinity) <= 1)
   )
 }
 

packages/app/e2e/performance/timeline/session-tab-switch-probe.ts

@@ -8,19 +8,56 @@ type SessionSwitchProbe = {
 
 async function installSessionSwitchProbe(
   page: Page,
-  input: { destinationIDs: string[]; sourceIDs: string[]; lastID: string; href: string },
+  input: {
+    destinationIDs: string[]
+    sourceIDs: string[]
+    lastID: string
+    requiredPartID?: string
+    requireBottomAnchor?: boolean
+    href: string
+  },
 ) {
-  await page.evaluate(({ destinationIDs, sourceIDs, lastID, href }) => {
+  await page.evaluate(({ destinationIDs, sourceIDs, lastID, requiredPartID, requireBottomAnchor, href }) => {
     const destination = new Set(destinationIDs)
     const source = new Set(sourceIDs)
     const samples: SessionSwitchSample[] = []
     let started: number | undefined
     let running = true
+    const reviewLevels: Record<string, string> = {
+      panel: "#review-panel",
+      tabs: '#review-panel [data-component="tabs"]',
+      body: '#review-panel [data-slot="session-review-v2-body"]',
+      review: '#review-panel [data-component="session-review-v2"]',
+      preview: '#review-panel [data-slot="session-review-v2-preview"]',
+      scroll: '#review-panel [data-slot="session-review-v2-diff-scroll"]',
+      file: '#review-panel [data-component="file"][data-mode="diff"]',
+    }
+    const initialReviewNodes: Record<string, Element | null> = {}
     const sample = () => {
       if (!running || started === undefined) return
       setTimeout(() => {
         if (!running || started === undefined) return
         const observedAtMs = performance.now() - started
+        const reviewPanel = document.querySelector<HTMLElement>("#review-panel")
+        const reviewFile = reviewPanel?.querySelector('[data-component="file"][data-mode="diff"]')
+        const initialReviewFile = initialReviewNodes.file
+        const replacedLevels = Object.entries(reviewLevels).flatMap(([name, selector]) => {
+          const initial = initialReviewNodes[name]
+          if (!initial) return []
+          const current = document.querySelector(selector)
+          return current && current !== initial ? [name] : []
+        })
+        const review = reviewPanel
+          ? {
+              fileHost: !!reviewFile,
+              fileHostReplaced: !!initialReviewFile && !!reviewFile && reviewFile !== initialReviewFile,
+              header:
+                reviewPanel
+                  .querySelector<HTMLElement>('[data-slot="session-review-v2-file-header"]')
+                  ?.textContent?.trim() ?? "",
+              replacedLevels,
+            }
+          : undefined
         const root = [...document.querySelectorAll<HTMLElement>(".scroll-view__viewport")].find((element) =>
           element.querySelector("[data-timeline-row]"),
         )
@@ -36,6 +73,13 @@ async function installSessionSwitchProbe(
             const rect = element.getBoundingClientRect()
             return rect.bottom > view.top && rect.top < view.bottom
           })
+          const requiredPartVisible = requiredPartID
+            ? [...root.querySelectorAll<HTMLElement>("[data-timeline-part-id]")].some((element) => {
+                if (element.dataset.timelinePartId !== requiredPartID) return false
+                const rect = element.getBoundingClientRect()
+                return rect.width > 0 && rect.height > 0 && rect.bottom > view.top && rect.top < view.bottom
+              })
+            : undefined
           const spacer = root.querySelector<HTMLElement>('[data-timeline-row="bottom-spacer"]')?.getBoundingClientRect()
           samples.push({
             observedAtMs,
@@ -43,10 +87,22 @@ async function installSessionSwitchProbe(
             source: visible.filter((id) => source.has(id)),
             hasVisibleRows,
             last: visible.includes(lastID),
+            requiredPartVisible,
+            bottomAnchorRequired: requireBottomAnchor !== false,
             bottomErrorPx: spacer ? spacer.bottom - view.bottom : undefined,
+            review,
           })
         } else {
-          samples.push({ observedAtMs, destination: [], source: [], hasVisibleRows: false, last: false })
+          samples.push({
+            observedAtMs,
+            destination: [],
+            source: [],
+            hasVisibleRows: false,
+            last: false,
+            requiredPartVisible: requiredPartID ? false : undefined,
+            bottomAnchorRequired: requireBottomAnchor !== false,
+            review,
+          })
         }
         requestAnimationFrame(sample)
       }, 0)
@@ -57,6 +113,9 @@ async function installSessionSwitchProbe(
         const link = event.target instanceof Element ? event.target.closest("a") : undefined
         if (link?.getAttribute("href") !== href) return
         started = performance.now()
+        for (const [name, selector] of Object.entries(reviewLevels)) {
+          initialReviewNodes[name] = document.querySelector(selector)
+        }
         requestAnimationFrame(sample)
       },
       { capture: true, once: true },
@@ -83,7 +142,8 @@ async function waitForStableSessionSwitch(page: Page) {
             sample.destination.length > 0 &&
             sample.source.length === 0 &&
             sample.last &&
-            Math.abs(sample.bottomErrorPx ?? Infinity) <= 1,
+            sample.requiredPartVisible !== false &&
+            (sample.bottomAnchorRequired === false || Math.abs(sample.bottomErrorPx ?? Infinity) <= 1),
         )
       )
     })
@@ -101,13 +161,27 @@ async function collectSessionSwitchResult(page: Page) {
 
 export async function measureSessionSwitch(
   page: Page,
-  input: { destinationIDs: string[]; sourceIDs: string[]; lastID: string; href: string; switch: () => Promise<void> },
+  input: {
+    destinationIDs: string[]
+    sourceIDs: string[]
+    lastID: string
+    requiredPartID?: string
+    requireBottomAnchor?: boolean
+    href: string
+    switch: () => Promise<void>
+  },
 ) {
   const { switch: run, ...probe } = input
   await installSessionSwitchProbe(page, probe)
-  await run()
-  await waitForStableSessionSwitch(page)
-  return collectSessionSwitchResult(page)
+  try {
+    await run()
+    await waitForStableSessionSwitch(page)
+    return await collectSessionSwitchResult(page)
+  } finally {
+    await page.evaluate(() => {
+      ;(window as Window & { __sessionSwitchProbe?: SessionSwitchProbe }).__sessionSwitchProbe?.stop()
+    })
+  }
 }
 
 export async function waitForStableTimeline(page: Page, lastID: string) {

packages/app/e2e/performance/timeline/session-timeline-benchmark.fixture.ts

@@ -93,36 +93,53 @@ const assistantMessage = {
   parts: [editPart],
 }
 
-export async function setupTimelineBenchmark(page: Page, options: { historyTurns: number; eventBatch: number }) {
+export async function setupTimelineBenchmark(
+  page: Page,
+  options: {
+    historyTurns: number
+    eventBatch: number
+    newLayoutDesigns?: boolean
+    vcsDiff?: unknown[]
+    turnDiffs?: unknown[]
+  },
+) {
   const events: EventPayload[] = []
   let eventBatch = options.eventBatch
+  const currentUserMessage = options.turnDiffs
+    ? { ...userMessage, info: { ...userMessage.info, summary: { diffs: options.turnDiffs } } }
+    : userMessage
   await mockOpenCodeServer(page, {
     directory,
     project: project(),
     provider: provider(),
     sessions: [session()],
+    vcsDiff: options.vcsDiff,
     pageMessages: () => ({
       items: [
         ...Array.from({ length: options.historyTurns }, (_, index) => performanceTurn(index)).flat(),
-        userMessage,
+        currentUserMessage,
         assistantMessage,
       ],
     }),
     events: () => events.splice(0, eventBatch),
     eventRetry: 16,
   })
-  await page.addInitScript(() => {
-    localStorage.setItem(
-      "settings.v3",
-      JSON.stringify({
-        general: {
-          editToolPartsExpanded: true,
-          shellToolPartsExpanded: true,
-          showReasoningSummaries: true,
-        },
-      }),
-    )
-  })
+  await page.addInitScript(
+    (input) => {
+      localStorage.setItem(
+        "settings.v3",
+        JSON.stringify({
+          general: {
+            newLayoutDesigns: input.newLayoutDesigns,
+            editToolPartsExpanded: true,
+            shellToolPartsExpanded: true,
+            showReasoningSummaries: true,
+          },
+        }),
+      )
+    },
+    { newLayoutDesigns: options.newLayoutDesigns ?? false },
+  )
   await page.setViewportSize({ width: 1366, height: 768 })
   const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
   const text = page.locator(`[data-timeline-part-id="${textPartID}"]`).first()

packages/app/e2e/performance/timeline/session-timeline-benchmark.spec.ts

@@ -1,3 +1,4 @@
+import type { Page } from "@playwright/test"
 import { benchmark, benchmarkDiagnostics, expect } from "../benchmark"
 import {
   buildInitialStreamEvent,
@@ -6,80 +7,300 @@ import {
   textPartID,
 } from "./session-timeline-benchmark.fixture"
 import { startTimelineProfile } from "./session-timeline-profile"
+import { createReviewDiffs } from "./timeline-test-helpers"
 import {
   collectTimelineStreamMetrics,
   installTimelineStreamProbe,
   startTimelineStreamProbe,
 } from "./session-timeline-stream-probe"
 
+type TimelineStreamOptions = {
+  newLayoutDesigns?: boolean
+  reviewDiffs?: boolean
+  reviewPane?: boolean
+}
+
+type ReviewPaneSample = {
+  observedAtMs: number
+  panelVisible: boolean
+  header: string
+  diffViewers: number
+  diffLines: number
+  codeBlocks: number
+  ready: boolean
+}
+
+type ReviewPaneProbe = {
+  samples: ReviewPaneSample[]
+  start: () => void
+  stop: () => void
+}
+
+const reviewReadyStreak = 3
+
 benchmark.describe("performance: session timeline streaming", () => {
   benchmark("streams assistant text without remounting or oscillating", async ({ page, report }) => {
-    benchmark.setTimeout(480_000)
-    const cpuThrottle = Number(process.env.TIMELINE_CPU_THROTTLE ?? 30)
-    const deltaCount = Number(process.env.TIMELINE_DELTA_COUNT ?? 160)
-    const historyTurns = Number(process.env.TIMELINE_HISTORY_TURNS ?? 320)
-    const eventBatch = Number(process.env.TIMELINE_EVENT_BATCH ?? 1)
-    const minimal = process.env.TIMELINE_MINIMAL === "1"
-    const profileCPU = process.env.TIMELINE_CPU_PROFILE === "1"
-    const profileVisual = !minimal && profileCPU && process.env.TIMELINE_VISUAL_PROFILE !== "0"
+    benchmark.setTimeout(Number(process.env.TIMELINE_COMPLETION_TIMEOUT_MS ?? 420_000) + 60_000)
+    const result = await runTimelineStreamBenchmark(page, {})
+    report(result.metrics, result.context)
+  })
+
+  benchmark("streams assistant text in v2 with review pane closed", async ({ page, report }) => {
+    benchmark.setTimeout(Number(process.env.TIMELINE_COMPLETION_TIMEOUT_MS ?? 420_000) + 60_000)
+    const result = await runTimelineStreamBenchmark(page, { newLayoutDesigns: true })
+    report(result.metrics, result.context)
+  })
+
+  benchmark("streams assistant text in v2 with review diffs and pane closed", async ({ page, report }) => {
+    benchmark.setTimeout(Number(process.env.TIMELINE_COMPLETION_TIMEOUT_MS ?? 420_000) + 60_000)
+    const result = await runTimelineStreamBenchmark(page, { newLayoutDesigns: true, reviewDiffs: true })
+    report(result.metrics, result.context)
+  })
+
+  benchmark("streams assistant text in v2 with review pane open", async ({ page, report }) => {
+    benchmark.setTimeout(Number(process.env.TIMELINE_COMPLETION_TIMEOUT_MS ?? 420_000) + 60_000)
+    const result = await runTimelineStreamBenchmark(page, { newLayoutDesigns: true, reviewPane: true })
+    report(result.metrics, result.context)
+  })
+})
+
+benchmark.describe("performance: review pane", () => {
+  benchmark("loads v2 review diffs and switches active files", async ({ page, report }) => {
+    benchmark.setTimeout(240_000)
+    const historyTurns = Number(process.env.REVIEW_PANE_HISTORY_TURNS ?? 72)
+    const diffs = createReviewDiffs()
     const fixture = await setupTimelineBenchmark(page, {
       historyTurns,
-      eventBatch,
+      eventBatch: 1,
+      newLayoutDesigns: true,
+      vcsDiff: diffs,
     })
 
-    fixture.transport.enqueue(buildInitialStreamEvent(deltaCount))
-    const contentStart = performance.now()
+    fixture.transport.enqueue(buildInitialStreamEvent(1))
     await expect(fixture.text).toBeVisible()
     await expect(fixture.text).toContainText("Implementation plan")
-    const initialContentObservedMs = performance.now() - contentStart
     await fixture.scrollToBottom()
     await fixture.waitForStableGeometry()
 
-    const profile = await startTimelineProfile(page, { cpuThrottle, profileCPU })
-    await installTimelineStreamProbe(page, { textPartID, finalIndex: deltaCount, profileVisual, minimal })
-    const deltas = buildStreamDeltaEvents(deltaCount)
-    await startTimelineStreamProbe(page)
-    fixture.transport.enqueue(deltas)
-
-    await page.waitForFunction(
-      (finalIndex) =>
-        (
-          window as Window & {
-            __timelineStreamBenchmark?: { applied: { index: number }[] }
-          }
-        ).__timelineStreamBenchmark?.applied.some((value) => value.index === finalIndex),
-      deltaCount,
-      { timeout: 420_000 },
-    )
-    await expect(fixture.text).toContainText("benchmark-complete")
-    await expect(fixture.text).toContainText("Streaming")
-    await fixture.waitForStableGeometry()
-    const metrics = await collectTimelineStreamMetrics(page, {
-      textPartID,
-      finalIndex: deltaCount,
-      navigations: benchmarkDiagnostics(page).navigations,
-    })
-    const delivered = deltas.length - fixture.transport.pendingCount()
-    await profile.stop()
+    const open = await measureReviewPaneLoad(page, diffs[0]!.file)
+    const switches = []
+    for (const diff of diffs.slice(1, 4)) switches.push(await measureReviewNextFile(page, diff.file))
 
     report(
       {
-        endToEndInitialContentObservedMs: initialContentObservedMs,
-        ...metrics,
-        deliveredDeltas: delivered,
-        pendingDeltas: fixture.transport.pendingCount(),
+        open,
+        switches,
       },
       {
-        cpuThrottle,
-        profileCPU,
-        profileVisual,
-        minimal,
-        queuedDeltas: deltas.length,
         historyTurns,
-        eventBatch,
+        reviewDiffs: diffs.length,
       },
     )
-
-    await profile.reset()
   })
 })
+
+async function runTimelineStreamBenchmark(page: Page, options: TimelineStreamOptions) {
+  const completionTimeoutMs = Number(process.env.TIMELINE_COMPLETION_TIMEOUT_MS ?? 420_000)
+  const cpuThrottle = Number(process.env.TIMELINE_CPU_THROTTLE ?? 30)
+  const deltaCount = Number(process.env.TIMELINE_DELTA_COUNT ?? 160)
+  const historyTurns = Number(process.env.TIMELINE_HISTORY_TURNS ?? 320)
+  const eventBatch = Number(process.env.TIMELINE_EVENT_BATCH ?? 1)
+  const minimal = process.env.TIMELINE_MINIMAL === "1"
+  const profileCPU = process.env.TIMELINE_CPU_PROFILE === "1"
+  const profileVisual = !minimal && profileCPU && process.env.TIMELINE_VISUAL_PROFILE !== "0"
+  const diffs = options.reviewDiffs || options.reviewPane ? createReviewDiffs() : undefined
+  const fixture = await setupTimelineBenchmark(page, {
+    historyTurns,
+    eventBatch,
+    newLayoutDesigns: options.newLayoutDesigns,
+    // Turn diffs exercise timeline data cost; the pane-open scenario serves the same
+    // diffs through the default git mode so it works across review implementations.
+    turnDiffs: options.reviewDiffs ? diffs : undefined,
+    vcsDiff: options.reviewPane ? diffs : undefined,
+  })
+
+  fixture.transport.enqueue(buildInitialStreamEvent(deltaCount))
+  const contentStart = performance.now()
+  await expect(fixture.text).toBeVisible()
+  await expect(fixture.text).toContainText("Implementation plan")
+  const initialContentObservedMs = performance.now() - contentStart
+  await fixture.scrollToBottom()
+  await fixture.waitForStableGeometry()
+
+  const reviewPane = options.reviewPane && diffs ? await measureReviewPaneLoad(page, diffs[0]!.file) : undefined
+  if (reviewPane) await fixture.waitForStableGeometry()
+
+  const profile = await startTimelineProfile(page, { cpuThrottle, profileCPU })
+  await installTimelineStreamProbe(page, { textPartID, finalIndex: deltaCount, profileVisual, minimal })
+  const deltas = buildStreamDeltaEvents(deltaCount)
+  await startTimelineStreamProbe(page)
+  fixture.transport.enqueue(deltas)
+
+  await page.waitForFunction(
+    (finalIndex) =>
+      (
+        window as Window & {
+          __timelineStreamBenchmark?: { applied: { index: number }[] }
+        }
+      ).__timelineStreamBenchmark?.applied.some((value) => value.index === finalIndex),
+    deltaCount,
+    { timeout: completionTimeoutMs },
+  )
+  await expect(fixture.text).toContainText("benchmark-complete")
+  await expect(fixture.text).toContainText("Streaming")
+  await fixture.waitForStableGeometry()
+  const metrics = await collectTimelineStreamMetrics(page, {
+    textPartID,
+    finalIndex: deltaCount,
+    navigations: benchmarkDiagnostics(page).navigations,
+  })
+  const delivered = deltas.length - fixture.transport.pendingCount()
+  await profile.stop()
+
+  const result = {
+    metrics: {
+      endToEndInitialContentObservedMs: initialContentObservedMs,
+      ...metrics,
+      deliveredDeltas: delivered,
+      pendingDeltas: fixture.transport.pendingCount(),
+      reviewPane: reviewPane ?? null,
+    },
+    context: {
+      cpuThrottle,
+      profileCPU,
+      profileVisual,
+      minimal,
+      queuedDeltas: deltas.length,
+      historyTurns,
+      eventBatch,
+      newLayoutDesigns: options.newLayoutDesigns === true,
+      reviewPane: options.reviewPane === true ? "open" : "closed",
+      reviewDiffs: diffs?.length ?? 0,
+    },
+  }
+
+  await profile.reset()
+  return result
+}
+
+async function measureReviewPaneLoad(page: Page, file: string) {
+  // Default git mode reads the mocked /vcs/diff data, so opening the pane is enough
+  // and the flow works across review pane implementations.
+  await installReviewPaneProbe(page, { file })
+  await startReviewPaneProbe(page)
+  await page.getByRole("button", { name: "Toggle review" }).click()
+  await expect(page.locator("#review-panel")).toBeVisible()
+  return collectReviewPaneProbe(page)
+}
+
+async function measureReviewNextFile(page: Page, file: string) {
+  await installReviewPaneProbe(page, { file })
+  await startReviewPaneProbe(page)
+  await page.getByRole("button", { name: "Next file" }).click()
+  return collectReviewPaneProbe(page)
+}
+
+async function installReviewPaneProbe(page: Page, input: { file: string }) {
+  await page.evaluate((input) => {
+    const samples: ReviewPaneSample[] = []
+    const basename = input.file.split(/[\\/]/).at(-1) ?? input.file
+    let started: number | undefined
+    let running = true
+
+    const paneState = () => {
+      const panel = document.querySelector<HTMLElement>("#review-panel")
+      const review = panel?.querySelector<HTMLElement>('[data-component="session-review-v2"]')
+      const rect = (review ?? panel)?.getBoundingClientRect()
+      const text = panel?.textContent ?? ""
+      const previewHeader = panel?.querySelector<HTMLElement>(
+        '[data-slot="session-review-v2-file-header"]',
+      )?.textContent
+      const header = previewHeader ?? text
+      const viewers = panel ? [...panel.querySelectorAll<HTMLElement>('[data-component="file"][data-mode="diff"]')] : []
+      const codeBlocks = panel?.querySelectorAll("code").length ?? 0
+      const diffLines = viewers.reduce(
+        (sum, viewer) =>
+          sum +
+          (viewer.shadowRoot?.querySelectorAll("[data-line]").length ?? viewer.querySelectorAll("[data-line]").length),
+        0,
+      )
+      const panelVisible =
+        !!panel && panel.getAttribute("aria-hidden") !== "true" && !!rect && rect.width > 0 && rect.height > 0
+      return {
+        panelVisible,
+        header: header.slice(0, 500),
+        diffViewers: viewers.length,
+        diffLines,
+        codeBlocks,
+        ready:
+          panelVisible &&
+          header.includes(basename) &&
+          (viewers.length > 0 || text.includes("+3") || diffLines > 0 || codeBlocks > 0),
+      }
+    }
+
+    const sample = () => {
+      if (!running || started === undefined) return
+      requestAnimationFrame(() => {
+        setTimeout(() => {
+          if (!running || started === undefined) return
+          samples.push({ observedAtMs: performance.now() - started, ...paneState() })
+          if (performance.now() - started < 10_000) sample()
+        }, 0)
+      })
+    }
+
+    ;(window as Window & { __reviewPaneProbe?: ReviewPaneProbe }).__reviewPaneProbe = {
+      samples,
+      start: () => {
+        started = performance.now()
+        performance.mark("opencode.review-pane.click")
+        sample()
+      },
+      stop: () => {
+        running = false
+      },
+    }
+  }, input)
+}
+
+async function startReviewPaneProbe(page: Page) {
+  await page.evaluate(() => {
+    ;(window as Window & { __reviewPaneProbe?: ReviewPaneProbe }).__reviewPaneProbe!.start()
+  })
+}
+
+async function collectReviewPaneProbe(page: Page) {
+  await page.waitForFunction((streak) => {
+    const samples = (window as Window & { __reviewPaneProbe?: ReviewPaneProbe }).__reviewPaneProbe?.samples
+    if (!samples) return false
+    return samples.some((_, index) => {
+      const stable = samples.slice(index, index + streak)
+      return stable.length === streak && stable.every((sample) => sample.ready)
+    })
+  }, reviewReadyStreak)
+
+  const samples = await page.evaluate(() => {
+    const probe = (window as Window & { __reviewPaneProbe?: ReviewPaneProbe }).__reviewPaneProbe!
+    probe.stop()
+    return probe.samples
+  })
+  return { summary: summarizeReviewPaneSamples(samples), samples }
+}
+
+function summarizeReviewPaneSamples(samples: ReviewPaneSample[]) {
+  const firstReady = samples.find((sample) => sample.ready)
+  const stableIndex = samples.findIndex((_, index) => {
+    const stable = samples.slice(index, index + reviewReadyStreak)
+    return stable.length === reviewReadyStreak && stable.every((sample) => sample.ready)
+  })
+  return {
+    samples: samples.length,
+    firstReadyObservedMs: firstReady?.observedAtMs ?? null,
+    stableReadyObservedMs: stableIndex === -1 ? null : samples[stableIndex + reviewReadyStreak - 1]!.observedAtMs,
+    notReadySamples: samples.filter((sample) => !sample.ready).length,
+    maxDiffViewers: Math.max(0, ...samples.map((sample) => sample.diffViewers)),
+    maxDiffLines: Math.max(0, ...samples.map((sample) => sample.diffLines)),
+    maxCodeBlocks: Math.max(0, ...samples.map((sample) => sample.codeBlocks)),
+  }
+}

packages/app/e2e/performance/timeline/timeline-test-helpers.ts

@@ -21,7 +21,10 @@ export async function installTimelineSettings(page: Page) {
 
 export function mockStressTimeline(
   page: Page,
-  input?: { onMessages?: (input: { sessionID: string; before?: string; phase: "start" | "end" }) => void },
+  input?: {
+    onMessages?: (input: { sessionID: string; before?: string; phase: "start" | "end" }) => void
+    vcsDiff?: unknown[]
+  },
 ) {
   return mockOpenCodeServer(page, {
     sessions: fixture.sessions,
@@ -30,6 +33,7 @@ export function mockStressTimeline(
     project: fixture.project,
     pageMessages,
     onMessages: input?.onMessages,
+    vcsDiff: input?.vcsDiff,
   })
 }
 
@@ -45,7 +49,7 @@ export async function installStressSessionTabs(page: Page, input?: { draftID?: s
         }),
       )
       localStorage.setItem(
-        "opencode.global.dat:tabs",
+        "opencode.window.browser.dat:tabs",
         JSON.stringify([
           ...sessionIDs.map((sessionId) => ({
             type: "session",
@@ -78,3 +82,53 @@ export function stressDraftHref(draftID: string) {
 function stressServer() {
   return `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
 }
+
+export function createReviewDiffs() {
+  return Array.from({ length: Number(process.env.REVIEW_PANE_DIFF_COUNT ?? 72) }, (_, index) => {
+    const lines = index % 3 === 0 ? 300 : index % 3 === 1 ? 120 : 38
+    const file = `src/review/generated-${String(index).padStart(3, "0")}.ts`
+    const before = reviewSource(index, lines)
+    const after = before
+      .replace(`value_${index}_4`, `updated_${index}_4`)
+      .replace(
+        `value_${index}_${Math.max(8, Math.floor(lines / 2))}`,
+        `updated_${index}_${Math.max(8, Math.floor(lines / 2))}`,
+      )
+      .replace(`value_${index}_${lines - 4}`, `updated_${index}_${lines - 4}`)
+    return {
+      file,
+      patch: reviewPatch(file, before, after),
+      additions: 3,
+      deletions: 3,
+      status: "modified" as const,
+    }
+  })
+}
+
+function reviewSource(seed: number, lines: number) {
+  return Array.from(
+    { length: lines },
+    (_, index) => `export const value_${seed}_${index} = "${reviewWords(seed + index, index % 5 === 0 ? 180 : 42)}"`,
+  ).join("\n")
+}
+
+function reviewPatch(file: string, before: string, after: string) {
+  const beforeLines = before.split("\n")
+  const afterLines = after.split("\n")
+  return [
+    `diff --git a/${file} b/${file}`,
+    `--- a/${file}`,
+    `+++ b/${file}`,
+    `@@ -1,${beforeLines.length} +1,${afterLines.length} @@`,
+    ...beforeLines.flatMap((line, index) => {
+      const next = afterLines[index]!
+      if (line === next) return [` ${line}`]
+      return [`-${line}`, `+${next}`]
+    }),
+  ].join("\n")
+}
+
+function reviewWords(seed: number, length: number) {
+  const words = ["alpha", "bravo", "charlie", "delta", "echo", "foxtrot", "golf", "hotel", "india", "juliet"]
+  return Array.from({ length: Math.ceil(length / 7) }, (_, index) => words[(seed + index * 3) % words.length]).join(" ")
+}

packages/app/e2e/performance/unit/mock-server.test.ts

@@ -0,0 +1,46 @@
+import { expect, test } from "bun:test"
+import type { Page, Route } from "@playwright/test"
+import { mockOpenCodeServer } from "../../utils/mock-server"
+
+test("applies message latency after a list response gate is released", async () => {
+  const events: string[] = []
+  const gate = Promise.withResolvers<void>()
+  let handler: ((route: Route) => Promise<void>) | undefined
+  const page = {
+    route: (_url: string, callback: (route: Route) => Promise<void>) => {
+      handler = callback
+      return Promise.resolve()
+    },
+  } as unknown as Page
+  await mockOpenCodeServer(page, {
+    provider: {},
+    directory: "C:/OpenCode",
+    project: {},
+    sessions: [{ id: "session" }],
+    messageDelay: 25,
+    beforeMessagesResponse: () => {
+      events.push("before")
+      return gate.promise
+    },
+    onMessages: (request) => events.push(request.phase),
+    pageMessages: () => {
+      events.push("page")
+      return { items: [] }
+    },
+  })
+
+  const response = handler!({
+    request: () => ({ url: () => "http://127.0.0.1:4096/session/session/message" }),
+    fulfill: () => {
+      events.push("fulfill")
+      return Promise.resolve()
+    },
+  } as unknown as Route)
+  expect(events).toEqual(["start", "before"])
+
+  const released = performance.now()
+  gate.resolve()
+  await response
+  expect(performance.now() - released).toBeGreaterThanOrEqual(20)
+  expect(events).toEqual(["start", "before", "page", "end", "fulfill"])
+})

packages/app/e2e/performance/unit/session-tab-switch-metrics.test.ts

@@ -52,3 +52,35 @@ test("reports missing correctness without throwing", () => {
   expect(result.firstCorrectObservedMs).toBeNull()
   expect(result.stableObservedMs).toBeNull()
 })
+
+test("requires an explicitly tracked part to be visible", () => {
+  const result = classifySessionSwitch([
+    {
+      observedAtMs: 16,
+      destination: ["destination"],
+      source: [],
+      hasVisibleRows: true,
+      last: true,
+      requiredPartVisible: false,
+      bottomErrorPx: 0,
+    },
+  ])
+
+  expect(result.firstCorrectObservedMs).toBeNull()
+})
+
+test("can measure content correctness without requiring a bottom anchor", () => {
+  const result = classifySessionSwitch([
+    {
+      observedAtMs: 16,
+      destination: ["destination"],
+      source: [],
+      hasVisibleRows: true,
+      last: true,
+      requiredPartVisible: true,
+      bottomAnchorRequired: false,
+    },
+  ])
+
+  expect(result.firstCorrectObservedMs).toBe(16)
+})

packages/app/e2e/performance/unit/session-tab-switch-probe.test.ts

@@ -0,0 +1,55 @@
+import { expect, test } from "bun:test"
+import type { Page } from "@playwright/test"
+import { measureSessionSwitch } from "../timeline/session-tab-switch-probe"
+
+function testPage(waitFailure?: Error) {
+  const stops: unknown[] = []
+  const page = {
+    evaluate: async (_callback: unknown, input?: unknown) => {
+      if (input) return
+      stops.push(undefined)
+    },
+    waitForFunction: async () => {
+      if (waitFailure) throw waitFailure
+    },
+  } as unknown as Page
+  return { page, stops }
+}
+
+function input(run: () => Promise<void>) {
+  return {
+    destinationIDs: ["destination"],
+    sourceIDs: ["source"],
+    lastID: "destination",
+    href: "/session/destination",
+    switch: run,
+  }
+}
+
+test("stops sampling when the session switch fails", async () => {
+  const failure = new Error("switch failed")
+  const context = testPage()
+
+  await expect(
+    measureSessionSwitch(
+      context.page,
+      input(async () => Promise.reject(failure)),
+    ),
+  ).rejects.toBe(failure)
+
+  expect(context.stops).toHaveLength(1)
+})
+
+test("stops sampling when the stable wait fails", async () => {
+  const failure = new Error("stable wait failed")
+  const context = testPage(failure)
+
+  await expect(
+    measureSessionSwitch(
+      context.page,
+      input(async () => {}),
+    ),
+  ).rejects.toBe(failure)
+
+  expect(context.stops).toHaveLength(1)
+})

packages/app/e2e/performance/unit/visual-stability.test.ts

@@ -0,0 +1,392 @@
+import { expect, test } from "bun:test"
+import {
+  analyzeVisualStability,
+  analyzeVisualStabilityByMarker,
+  type VisualStabilityTrace,
+} from "../../utils/visual-stability"
+import { analyzeVisualObservations } from "../../utils/visual-stability/analyzer"
+import { legacyVisualPlan, visualPlan, type VisualInvariant } from "../../utils/visual-stability/invariant"
+import { defineVisualRegions, mapVisualRegions } from "../../utils/visual-stability/regions"
+
+function trace(samples: VisualStabilityTrace["samples"]): VisualStabilityTrace {
+  return { markers: [], samples }
+}
+
+test("accepts continuous visible motion", () => {
+  expect(
+    analyzeVisualStability(
+      trace([
+        frame(0, region({ width: 80, bottom: 40 }), region({ top: 40, bottom: 60 })),
+        frame(16, region({ width: 75, bottom: 45 }), region({ top: 45, bottom: 65 })),
+        frame(32, region({ width: 70, bottom: 50 }), region({ top: 50, bottom: 70 })),
+      ]),
+      { flow: ["changing", "following"] },
+    ),
+  ).toEqual([])
+})
+
+test("reports repeated geometry reversals", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      frame(0, region({ width: 80 })),
+      frame(16, region({ width: 60 })),
+      frame(32, region({ width: 78 })),
+      frame(48, region({ width: 62 })),
+    ]),
+  )
+
+  expect(issues.some((issue) => issue.includes("changing width reversed 2 times"))).toBe(true)
+})
+
+test("reports visible blanking, label reversal, and overlap", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      frame(0, region({ label: "Exploring", opacity: 1, bottom: 40 }), region({ top: 40, bottom: 60 })),
+      frame(16, region({ label: "Explored", opacity: 0.2, bottom: 50 }), region({ top: 49, bottom: 69 })),
+      frame(32, region({ label: "Exploring", opacity: 1, bottom: 50 }), region({ top: 50, bottom: 70 })),
+    ]),
+    { flow: ["changing", "following"] },
+  )
+
+  expect(issues.some((issue) => issue.includes("opacity fell to 0.2"))).toBe(true)
+  expect(issues.some((issue) => issue.includes("label reverted"))).toBe(true)
+  expect(issues.some((issue) => issue.includes("overlapped following by 1px"))).toBe(true)
+})
+
+test("reports duplicate regions and unexpected remounts", () => {
+  const issues = analyzeVisualStability(
+    trace([frame(0, region({ node: 1 })), frame(16, region({ node: 2, count: 2 })), frame(32, region({ node: 2 }))]),
+    { stable: ["changing"], unique: ["changing"] },
+  )
+
+  expect(issues.some((issue) => issue.includes("changing appeared 2 times"))).toBe(true)
+  expect(issues.some((issue) => issue.includes("changing remounted"))).toBe(true)
+})
+
+test("reports bottom anchor loss but permits movement while scrolled away", () => {
+  const anchored = analyzeVisualStability(
+    trace([
+      { at: 0, regions: { changing: region() }, viewport: viewport(0) },
+      { at: 16, regions: { changing: region() }, viewport: viewport(24) },
+    ]),
+    { preserveBottomAnchor: true },
+  )
+  const away = analyzeVisualStability(
+    trace([
+      { at: 0, regions: { changing: region() }, viewport: viewport(80) },
+      { at: 16, regions: { changing: region() }, viewport: viewport(104) },
+    ]),
+    { preserveBottomAnchor: true },
+  )
+
+  expect(anchored.some((issue) => issue.includes("bottom anchor moved to 24px"))).toBe(true)
+  expect(away).toEqual([])
+})
+
+test("reports up down up movement while preserving a bottom anchor", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      { at: 0, regions: { changing: region({ top: 200, bottom: 240 }) }, viewport: viewport(0) },
+      { at: 16, regions: { changing: region({ top: 180, bottom: 220 }) }, viewport: viewport(0) },
+      { at: 32, regions: { changing: region({ top: 196, bottom: 236 }) }, viewport: viewport(0) },
+      { at: 48, regions: { changing: region({ top: 176, bottom: 216 }) }, viewport: viewport(0) },
+    ]),
+    { preserveBottomAnchor: true, maxPositionReversals: 0 },
+  )
+
+  expect(issues.some((issue) => issue.includes("changing top reversed 2 times"))).toBe(true)
+  expect(issues.some((issue) => issue.includes("changing bottom reversed 2 times"))).toBe(true)
+})
+
+test("accepts monotonic upward movement while preserving a bottom anchor", () => {
+  expect(
+    analyzeVisualStability(
+      trace([
+        { at: 0, regions: { changing: region({ top: 200, bottom: 240 }) }, viewport: viewport(0) },
+        { at: 16, regions: { changing: region({ top: 190, bottom: 230 }) }, viewport: viewport(0) },
+        { at: 32, regions: { changing: region({ top: 180, bottom: 220 }) }, viewport: viewport(0) },
+      ]),
+      { preserveBottomAnchor: true, maxPositionReversals: 0 },
+    ),
+  ).toEqual([])
+})
+
+test("ignores overlap entirely outside the clipped timeline viewport", () => {
+  expect(
+    analyzeVisualStability(
+      trace([
+        {
+          at: 0,
+          regions: {
+            changing: region({ top: -200, bottom: -100 }),
+            following: region({ top: -150, bottom: -50 }),
+          },
+          viewport: viewport(0),
+        },
+      ]),
+      { flow: ["changing", "following"] },
+    ),
+  ).toEqual([])
+})
+
+test("reports visible anchor movement while allowing virtual scrollbar movement", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      { at: 0, regions: { anchor: region({ top: 100, bottom: 120 }) }, viewport: { ...viewport(100), scrollTop: 40 } },
+      { at: 16, regions: { anchor: region({ top: 100, bottom: 120 }) }, viewport: { ...viewport(120), scrollTop: 60 } },
+    ]),
+    { fixed: ["anchor"] },
+  )
+
+  expect(issues).toEqual([])
+
+  const moved = analyzeVisualStability(
+    trace([
+      { at: 0, regions: { anchor: region({ top: 100, bottom: 120 }) }, viewport: viewport(100) },
+      { at: 16, regions: { anchor: region({ top: 112, bottom: 132 }) }, viewport: viewport(100) },
+    ]),
+    { fixed: ["anchor"] },
+  )
+  expect(moved.some((issue) => issue.includes("anchor moved 12px in the viewport"))).toBe(true)
+})
+
+test("analyzes each marked event independently", () => {
+  const input: VisualStabilityTrace = {
+    markers: [
+      { at: 10, label: "grow" },
+      { at: 40, label: "shrink" },
+    ],
+    samples: [
+      frame(0, region({ top: 100 })),
+      frame(16, region({ top: 90 })),
+      frame(32, region({ top: 80 })),
+      frame(48, region({ top: 90 })),
+      frame(64, region({ top: 100 })),
+    ],
+  }
+
+  expect(analyzeVisualStability(input, { maxPositionReversals: 0 })).toContain("changing top reversed 1 times")
+  expect(
+    analyzeVisualStabilityByMarker(input, {
+      maxPositionReversals: 0,
+      motion: ["changing"],
+      aggregateMotion: false,
+    }),
+  ).toEqual([])
+})
+
+test("reports cross-event motion reversals by default", () => {
+  const input: VisualStabilityTrace = {
+    markers: [
+      { at: 10, label: "up" },
+      { at: 40, label: "down" },
+    ],
+    samples: [
+      frame(0, region({ top: 100 })),
+      frame(16, region({ top: 90 })),
+      frame(32, region({ top: 80 })),
+      frame(48, region({ top: 90 })),
+      frame(64, region({ top: 100 })),
+    ],
+  }
+
+  expect(analyzeVisualStabilityByMarker(input, { maxPositionReversals: 0 })).toContain("changing top reversed 1 times")
+})
+
+test("reports regions rendered in the wrong flow order", () => {
+  const issues = analyzeVisualStability(
+    trace([frame(0, region({ top: 100, bottom: 120 }), region({ top: 60, bottom: 80 }))]),
+    { flow: ["changing", "following"] },
+  )
+
+  expect(issues.some((issue) => issue.includes("changing rendered after following"))).toBe(true)
+})
+
+test("uses painted bounds instead of clipped layout overflow", () => {
+  expect(
+    analyzeVisualStability(
+      trace([
+        frame(
+          0,
+          region({ top: 100, bottom: 140, height: 40, layoutTop: 100, layoutBottom: 300 }),
+          region({ top: 140, bottom: 180 }),
+        ),
+      ]),
+      { flow: ["changing", "following"] },
+    ),
+  ).toEqual([])
+})
+
+test("does not report disappearance when a present row moves outside the viewport", () => {
+  expect(
+    analyzeVisualStability(
+      trace([
+        frame(0, region({ visible: true })),
+        frame(16, region({ visible: false, inViewport: false, top: -100, bottom: -80 })),
+        frame(32, region({ visible: true })),
+      ]),
+    ),
+  ).toEqual([])
+})
+
+test("reports an in-viewport transparent frame between visible frames", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      frame(0, region()),
+      frame(16, region({ visible: false, opacity: 0, inViewport: true })),
+      frame(32, region()),
+    ]),
+  )
+
+  expect(issues.some((issue) => issue.includes("blanked between visible frames"))).toBe(true)
+})
+
+test("reports an in-viewport display-none frame between visible frames", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      frame(0, region()),
+      frame(16, region({ visible: false, width: 0, height: 0, inViewport: true, cssHidden: true })),
+      frame(32, region()),
+    ]),
+  )
+
+  expect(issues.some((issue) => issue.includes("blanked between visible frames"))).toBe(true)
+})
+
+test("can limit motion analysis to unaffected regions", () => {
+  expect(
+    analyzeVisualStability(
+      trace([
+        frame(0, region({ height: 20 }), region()),
+        frame(16, region({ height: 40 }), region()),
+        frame(32, region({ height: 30 }), region()),
+      ]),
+      { motion: ["following"] },
+    ),
+  ).toEqual([])
+})
+
+test("reports a blank frame across replacement surfaces", () => {
+  const issues = analyzeVisualStability(
+    {
+      markers: [],
+      samples: [
+        { at: 0, regions: { thinking: region(), error: region({ present: false, visible: false }) } },
+        {
+          at: 16,
+          regions: {
+            thinking: region({ present: false, visible: false }),
+            error: region({ present: false, visible: false }),
+          },
+        },
+        { at: 32, regions: { thinking: region({ present: false, visible: false }), error: region() } },
+      ],
+    },
+    { continuousAny: [["thinking", "error"]] },
+  )
+
+  expect(issues.some((issue) => issue.includes("thinking | error blanked"))).toBe(true)
+})
+
+test("reports failure to acquire the bottom anchor", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      { at: 0, regions: { changing: region() }, viewport: viewport(600) },
+      { at: 16, regions: { changing: region() }, viewport: viewport(120) },
+    ]),
+    { acquireBottomAnchor: true },
+  )
+
+  expect(issues.some((issue) => issue.includes("did not acquire bottom anchor"))).toBe(true)
+})
+
+test("reports a required region that never renders", () => {
+  const issues = analyzeVisualStability(
+    trace([
+      {
+        at: 0,
+        regions: { changing: region({ present: false, visible: false }) },
+      },
+    ]),
+    { required: ["changing"] },
+  )
+
+  expect(issues).toContain("changing never rendered")
+})
+
+test("preserves typed region names while mapping definitions", () => {
+  const regions = defineVisualRegions({
+    changing: { selector: "[data-changing]" },
+    following: { selector: "[data-following]", closest: "[data-row]" },
+  })
+  const selectors = mapVisualRegions(regions, (region) => region.selector)
+
+  expect(selectors).toEqual({ changing: "[data-changing]", following: "[data-following]" })
+  const name: keyof typeof selectors = "changing"
+  expect(name).toBe("changing")
+})
+
+test("evaluates the typed invariant algebra over explicit observations", () => {
+  const regions = defineVisualRegions({
+    changing: { selector: "[data-changing]" },
+    following: { selector: "[data-following]" },
+  })
+  const invariants = [
+    { type: "required", regions: ["changing"] },
+    { type: "flow", regions: ["changing", "following"] },
+  ] satisfies VisualInvariant<keyof typeof regions>[]
+  // @ts-expect-error Plans reject names that are not in the region definition.
+  const invalid = { type: "required", regions: ["missing"] } satisfies VisualInvariant<keyof typeof regions>
+  const plan = visualPlan(regions, invariants, { perMarker: true })
+
+  expect(invalid.regions).toEqual(["missing"])
+  expect(plan.perMarker).toBe(true)
+  expect(analyzeVisualObservations([frame(0, region({ bottom: 50 }), region({ top: 49, bottom: 69 }))], plan)).toEqual([
+    "changing overlapped following by 1px at 0ms",
+  ])
+})
+
+test("legacy plan adapter preserves analyzer messages and order", () => {
+  const input = trace([
+    frame(0, region({ label: "Exploring", opacity: 1, bottom: 40 }), region({ top: 40, bottom: 60 })),
+    frame(16, region({ label: "Explored", opacity: 0.2, bottom: 50 }), region({ top: 49, bottom: 69 })),
+    frame(32, region({ label: "Exploring", opacity: 1, bottom: 50 }), region({ top: 50, bottom: 70 })),
+  ])
+  const options = { flow: ["changing", "following"], stable: ["changing"] }
+
+  expect(analyzeVisualObservations(input.samples, legacyVisualPlan(options))).toEqual(
+    analyzeVisualStability(input, options),
+  )
+})
+
+function frame(
+  at: number,
+  changing: VisualStabilityTrace["samples"][number]["regions"][string],
+  following?: VisualStabilityTrace["samples"][number]["regions"][string],
+) {
+  return { at, regions: { changing, ...(following ? { following } : {}) } }
+}
+
+function region(input: Partial<VisualStabilityTrace["samples"][number]["regions"][string]> = {}) {
+  return {
+    present: true,
+    visible: true,
+    inViewport: true,
+    top: 0,
+    bottom: 20,
+    width: 100,
+    height: 20,
+    opacity: 1,
+    count: 1,
+    node: 1,
+    label: "",
+    text: "",
+    layoutTop: input.top ?? 0,
+    layoutBottom: input.bottom ?? 20,
+    ...input,
+  }
+}
+
+function viewport(distanceFromBottom: number) {
+  return { top: 0, bottom: 400, scrollTop: 100, scrollHeight: 500, clientHeight: 400, distanceFromBottom }
+}

packages/app/e2e/regression/cross-server-tab-close.spec.ts

@@ -1,5 +1,6 @@
 import { expect, test, type Page, type Route } from "@playwright/test"
 import { base64Encode } from "@opencode-ai/core/util/encode"
+import { currentSession } from "../utils/mock-server"
 
 const serverA = "http://127.0.0.1:4096"
 const serverB = "http://127.0.0.1:4097"
@@ -14,7 +15,7 @@ test("closing the active server's last tab opens the remaining server tab", asyn
       localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
       localStorage.setItem("opencode.global.dat:server", JSON.stringify({ list: [serverB] }))
       localStorage.setItem(
-        "opencode.global.dat:tabs",
+        "opencode.window.browser.dat:tabs",
         JSON.stringify([
           { type: "session", server: "http://127.0.0.1:4096", sessionId: sessionA },
           { type: "session", server: serverB, sessionId: sessionB },
@@ -33,7 +34,7 @@ test("closing the active server's last tab opens the remaining server tab", asyn
   await tabA.locator('[data-slot="tab-close"] button').click()
 
   await expect(page).toHaveURL(new RegExp(`${hrefB.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}$`))
-  await expect.poll(() => requests.some((url) => url.startsWith(`${serverB}/session/${sessionB.id}`))).toBe(true)
+  await expect.poll(() => requests.some((url) => url.startsWith(`${serverB}/api/session/${sessionB.id}`))).toBe(true)
   await expect(page.getByText(sessionB.title).first()).toBeVisible()
   const sessionBRequests = requests.filter((url) => url.includes(`/session/${sessionB.id}`))
   expect(sessionBRequests.every((url) => url.startsWith(serverB))).toBe(true)
@@ -52,7 +53,7 @@ test("legacy session routes preserve an existing tab's server", async ({ page })
       localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
       localStorage.setItem("opencode.global.dat:server", JSON.stringify({ list: [serverB] }))
       localStorage.setItem(
-        "opencode.global.dat:tabs",
+        "opencode.window.browser.dat:tabs",
         JSON.stringify([{ type: "session", server: serverB, sessionId: sessionB }]),
       )
     },
@@ -84,17 +85,21 @@ async function mockServers(page: Page, requests: string[]) {
     const current = url.origin === serverA ? sessionA : sessionB
     const directory = url.searchParams.get("directory")
     if (directory && directory !== current.directory) return json(route, { name: "InvalidDirectory" }, 500)
-    if (url.pathname === "/global/event" || url.pathname === "/event") return sse(route)
-    if (url.pathname === "/global/health") return json(route, { healthy: true })
-    if (url.pathname === "/session") return json(route, [current])
+    if (url.pathname === "/global/event" || url.pathname === "/event" || url.pathname === "/api/event")
+      return sse(route)
+    if (url.pathname === "/global/health") return json(route, {}, 404)
+    if (url.pathname === "/api/health") return json(route, { pid: 1 })
+    if (url.pathname === "/api/session") return json(route, { data: [currentSession(current)], cursor: {} })
+    if (url.pathname === "/api/session/active") return json(route, { data: {} })
+    if (url.pathname === `/api/session/${current.id}`) return json(route, { data: currentSession(current) })
+    if (url.pathname === `/api/session/${current.id}/message`) return json(route, { data: [], cursor: {} })
     if (url.pathname === `/session/${current.id}`) return json(route, current)
     if (/^\/session\/[^/]+$/.test(url.pathname)) return json(route, { name: "NotFoundError" }, 404)
     if (url.pathname === `/session/${current.id}/message`) return json(route, [])
     if (/^\/session\/[^/]+\/(children|todo|diff)$/.test(url.pathname)) return json(route, [])
     if (["/skill", "/command", "/lsp", "/formatter", "/permission", "/question", "/vcs/diff"].includes(url.pathname))
       return json(route, [])
-    if (["/global/config", "/config", "/provider/auth", "/mcp", "/session/status"].includes(url.pathname))
-      return json(route, {})
+    if (["/global/config", "/config", "/provider/auth", "/mcp"].includes(url.pathname)) return json(route, {})
     if (url.pathname === "/provider")
       return json(route, { all: [], connected: [], default: { providerID: "", modelID: "" } })
     if (url.pathname === "/agent") return json(route, [{ name: "build", mode: "primary" }])
@@ -116,7 +121,20 @@ async function mockServers(page: Page, requests: string[]) {
         directory: current.directory,
         home: current.directory,
       })
+    if (url.pathname === "/api/path")
+      return json(route, {
+        state: current.directory,
+        config: current.directory,
+        worktree: current.directory,
+        directory: current.directory,
+        home: current.directory,
+      })
     if (url.pathname === "/vcs") return json(route, { branch: "main", default_branch: "main" })
+    if (url.pathname === "/api/vcs")
+      return json(route, {
+        location: { directory: current.directory },
+        data: { branch: "main", defaultBranch: "main" },
+      })
     return json(route, {})
   })
 }

packages/app/e2e/regression/file-browser-sidebar-tab-switch.spec.ts

@@ -0,0 +1,187 @@
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { expect, test, type Page } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectSessionTitle } from "../utils/waits"
+
+const directory = "C:/OpenCode/FileBrowserSidebar"
+const projectID = "proj_file_browser_sidebar"
+const sessionID = "ses_file_browser_sidebar"
+const title = "File browser sidebar"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+const files = Array.from({ length: 80 }, (_, index) => `file-${String(index).padStart(2, "0")}.ts`)
+// Marks the file-browser sidebar DOM node so a remount (fresh node) is detectable.
+const PROBE = "original"
+
+test.use({ viewport: { width: 1440, height: 900 } })
+
+// The file-browser sidebar must stay mounted across preview/pinned file-tab
+// switches. Remounting resets scroll and filter state.
+test("keeps the file-browser sidebar mounted when switching file tabs", async ({ page }) => {
+  await setup(page)
+
+  await page.goto(`/server/${base64Encode(server)}/session/${sessionID}`)
+  await expectSessionTitle(page, title)
+
+  const panel = page.locator("#review-panel")
+  await panel.getByRole("button", { name: "Open file" }).click()
+  await expect(panel.getByRole("tab", { name: "Open file" })).toHaveAttribute("data-selected", "")
+
+  const sidebar = panel.locator('[data-component="session-review-v2-sidebar-root"]')
+  await expect(sidebar).toBeVisible()
+  await expect(panel.getByRole("button", { name: "file-00.ts" })).toBeVisible()
+
+  await panel.getByRole("button", { name: "file-00.ts" }).click()
+  await expect(panel.getByRole("tab", { name: "file-00.ts" })).toHaveAttribute("data-selected", "")
+  await expect(panel.getByText("contents:file-00.ts", { exact: true })).toBeVisible()
+
+  const viewport = panel.locator('[data-slot="session-review-v2-sidebar-tree"] .scroll-view__viewport')
+  await viewport.hover()
+  await page.mouse.wheel(0, 100_000)
+  await expect
+    .poll(() => viewport.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop))
+    .toBeLessThanOrEqual(1)
+  const scrolled = await viewport.evaluate((element) => element.scrollTop)
+  expect(scrolled).toBeGreaterThan(0)
+  await writeProbe(page)
+
+  await panel.getByRole("button", { name: "file-79.ts" }).click()
+  await expect(panel.getByRole("tab", { name: "file-79.ts" })).toHaveAttribute("data-selected", "")
+  await expect(panel.getByText("contents:file-79.ts", { exact: true })).toBeVisible()
+  expect(await readProbe(page)).toBe(PROBE)
+  await expect.poll(() => viewport.evaluate((element) => element.scrollTop)).toBe(scrolled)
+
+  await panel.getByRole("button", { name: "file-78.ts" }).dblclick()
+  await expect(panel.getByRole("tab", { name: "file-78.ts" })).toHaveAttribute("data-selected", "")
+  await panel.getByRole("button", { name: "file-79.ts" }).click()
+  await expect(panel.getByRole("tab", { name: "file-79.ts" })).toHaveAttribute("data-selected", "")
+  await panel.getByRole("tab", { name: "file-78.ts" }).click()
+  await expect(panel.getByRole("tab", { name: "file-78.ts" })).toHaveAttribute("data-selected", "")
+  expect(await readProbe(page)).toBe(PROBE)
+  await expect.poll(() => viewport.evaluate((element) => element.scrollTop)).toBe(scrolled)
+})
+
+test("keeps previous file search results visible while the next search loads", async ({ page }) => {
+  const searchPending = Promise.withResolvers<void>()
+  await setup(page, async ({ query }) => {
+    if (query === "file-0") return ["file-00.ts"]
+    if (query === "file-7") {
+      await searchPending.promise
+      return ["file-79.ts"]
+    }
+    return []
+  })
+
+  await page.goto(`/server/${base64Encode(server)}/session/${sessionID}`)
+  await expectSessionTitle(page, title)
+
+  const panel = page.locator("#review-panel")
+  await panel.getByRole("button", { name: "Open file" }).click()
+  const filter = panel.getByRole("combobox", { name: "Filter files" })
+  await filter.fill("file-0")
+  await expect(panel.getByRole("option", { name: "file-00.ts" })).toBeVisible()
+
+  const nextSearch = page.waitForRequest((request) => {
+    const url = new URL(request.url())
+    return url.pathname === "/find/file" && url.searchParams.get("query") === "file-7"
+  })
+  await filter.fill("file-7")
+  await nextSearch
+  await expect(panel.getByRole("option", { name: "file-00.ts" })).toBeVisible()
+
+  searchPending.resolve()
+  await expect(panel.getByRole("option", { name: "file-79.ts" })).toBeVisible()
+  await expect(panel.getByRole("option", { name: "file-00.ts" })).toBeHidden()
+})
+
+type Probed = HTMLElement & { __e2eProbe?: string }
+
+async function writeProbe(page: Page) {
+  await page.locator('#review-panel [data-component="session-review-v2-sidebar-root"]').evaluate((el, probe) => {
+    ;(el as Probed).__e2eProbe = probe
+  }, PROBE)
+}
+
+async function readProbe(page: Page) {
+  return page
+    .locator('#review-panel [data-component="session-review-v2-sidebar-root"]')
+    .evaluate((el) => (el as Probed).__e2eProbe)
+}
+
+async function setup(
+  page: Page,
+  findFiles?: (input: { query: string; dirs?: string; limit?: number }) => unknown | Promise<unknown>,
+) {
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: projectID,
+      worktree: directory,
+      vcs: "git",
+      name: "file-browser-sidebar",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: {
+      all: [
+        {
+          id: "opencode",
+          name: "OpenCode",
+          models: { test: { id: "test", name: "Test", limit: { context: 200_000 } } },
+        },
+      ],
+      connected: ["opencode"],
+      default: { providerID: "opencode", modelID: "test" },
+    },
+    sessions: [
+      {
+        id: sessionID,
+        slug: sessionID,
+        projectID,
+        directory,
+        title,
+        version: "dev",
+        time: { created: 1700000000000, updated: 1700000000000 },
+      },
+    ],
+    vcsDiff: [],
+    fileList: (path) => {
+      if (path) return []
+      return files.map((name) => ({
+        name,
+        path: name,
+        absolute: `${directory}/${name}`,
+        type: "file" as const,
+        ignored: false,
+      }))
+    },
+    fileContent: (path) => ({ type: "text", content: `contents:${path}` }),
+    findFiles,
+    pageMessages: () => ({ items: [] }),
+  })
+
+  await page.addInitScript(
+    ({ directory, server, sessionID }) => {
+      localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+      localStorage.setItem(
+        "opencode.global.dat:server",
+        JSON.stringify({
+          projects: { local: [{ worktree: directory, expanded: true }] },
+          lastProject: { local: directory },
+        }),
+      )
+      localStorage.setItem(
+        "opencode.global.dat:layout",
+        JSON.stringify({ review: { diffStyle: "split", panelOpened: true } }),
+      )
+      localStorage.setItem(
+        "opencode.global.dat:review-panel-v2",
+        JSON.stringify({ sidebarOpened: true, sidebarWidth: 240, expandMode: "collapse" }),
+      )
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify([{ type: "session", server, sessionId: sessionID }]),
+      )
+    },
+    { directory, server, sessionID },
+  )
+}

packages/app/e2e/regression/new-session-panel-corner.spec.ts

@@ -0,0 +1,83 @@
+import { expect, test } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectAppVisible } from "../utils/waits"
+
+const draftID = "draft_new_session_panel_corner"
+const directory = "C:/OpenCode/NewSessionPanelCorner"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+
+test.use({
+  viewport: { width: 935, height: 522 },
+  deviceScaleFactor: 1,
+})
+
+test("matches the rounded panel corners to the dark new-session background", async ({ page }, testInfo) => {
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: "proj_new_session_panel_corner",
+      worktree: directory,
+      vcs: "git",
+      name: "new-session-panel-corner",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: { all: [], connected: [], default: {} },
+    sessions: [],
+    pageMessages: () => ({ items: [] }),
+  })
+  await page.addInitScript(
+    ({ directory, draftID, server }) => {
+      localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+      localStorage.setItem("opencode-theme-id", "oc-2")
+      localStorage.setItem("opencode-color-scheme", "dark")
+      localStorage.setItem(
+        "opencode.global.dat:server",
+        JSON.stringify({
+          projects: { local: [{ worktree: directory, expanded: true }] },
+          lastProject: { local: directory },
+        }),
+      )
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify([{ type: "draft", draftID, server, directory }]),
+      )
+    },
+    { directory, draftID, server },
+  )
+
+  await page.goto(`/new-session?draftId=${draftID}`)
+  await expectAppVisible(page.locator('[data-component="prompt-input"]'))
+  await expect(page.locator("html")).toHaveAttribute("data-color-scheme", "dark")
+  const panel = page.locator('main div[class*="rounded-[10px]"][class*="overflow-hidden"]')
+  await expect(panel).toHaveCount(1)
+  const box = await panel.boundingBox()
+  if (!box) throw new Error("New-session panel bounds are unavailable")
+
+  const screenshot = await page.screenshot({ path: testInfo.outputPath("new-session-dark.png") })
+  const corners = await page.evaluate(
+    async ({ source, points }) => {
+      const image = new Image()
+      image.src = source
+      await image.decode()
+      const canvas = document.createElement("canvas")
+      canvas.width = image.naturalWidth
+      canvas.height = image.naturalHeight
+      const context = canvas.getContext("2d")
+      if (!context) throw new Error("2D canvas is unavailable")
+      context.drawImage(image, 0, 0)
+      return points.map((point) => Array.from(context.getImageData(point.x, point.y, 1, 1).data))
+    },
+    {
+      source: `data:image/png;base64,${screenshot.toString("base64")}`,
+      points: [
+        { x: Math.floor(box.x), y: Math.floor(box.y) },
+        { x: Math.ceil(box.x + box.width) - 1, y: Math.floor(box.y) },
+        { x: Math.floor(box.x), y: Math.ceil(box.y + box.height) - 1 },
+        { x: Math.ceil(box.x + box.width) - 1, y: Math.ceil(box.y + box.height) - 1 },
+      ],
+    },
+  )
+
+  expect(corners.every(([red, green, blue, alpha]) => red <= 8 && green <= 8 && blue <= 8 && alpha === 255)).toBe(true)
+})

packages/app/e2e/regression/open-file-expand-folder.spec.ts

@@ -0,0 +1,132 @@
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { expect, test } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectSessionTitle } from "../utils/waits"
+
+const directory = "C:/OpenCode/OpenFileExpand"
+const projectID = "proj_open_file_expand"
+const sessionID = "ses_open_file_expand"
+const title = "Open file expand"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+
+test.use({ viewport: { width: 1440, height: 900 } })
+
+test("expands a folder whose path has a trailing Windows separator", async ({ page }) => {
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: projectID,
+      worktree: directory,
+      vcs: "git",
+      name: "open-file-expand",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: {
+      all: [
+        {
+          id: "opencode",
+          name: "OpenCode",
+          models: { test: { id: "test", name: "Test", limit: { context: 200_000 } } },
+        },
+      ],
+      connected: ["opencode"],
+      default: { providerID: "opencode", modelID: "test" },
+    },
+    sessions: [
+      {
+        id: sessionID,
+        slug: sessionID,
+        projectID,
+        directory,
+        title,
+        version: "dev",
+        time: { created: 1700000000000, updated: 1700000000000 },
+      },
+    ],
+    vcsDiff: [],
+    fileList: (path) => {
+      if (path === "frontend\\" || path === "frontend") {
+        return [
+          {
+            name: "app.ts",
+            path: "frontend\\app.ts",
+            absolute: `${directory}/frontend/app.ts`,
+            type: "file" as const,
+            ignored: false,
+          },
+        ]
+      }
+      if (path) return []
+      return [
+        {
+          name: "frontend",
+          path: "frontend\\",
+          absolute: `${directory}/frontend`,
+          type: "directory" as const,
+          ignored: false,
+        },
+        {
+          name: "README.md",
+          path: "README.md",
+          absolute: `${directory}/README.md`,
+          type: "file" as const,
+          ignored: false,
+        },
+      ]
+    },
+    fileContent: (path) => ({ type: "text", content: `contents:${path}` }),
+    pageMessages: () => ({ items: [] }),
+  })
+
+  await page.addInitScript(
+    ({ directory, server, sessionID }) => {
+      localStorage.setItem(
+        "settings.v3",
+        JSON.stringify({ general: { newLayoutDesigns: true, shouldDisplayTabsToast: false } }),
+      )
+      localStorage.setItem(
+        "opencode.global.dat:server",
+        JSON.stringify({
+          projects: { local: [{ worktree: directory, expanded: true }] },
+          lastProject: { local: directory },
+        }),
+      )
+      localStorage.setItem(
+        "opencode.global.dat:layout",
+        JSON.stringify({ review: { diffStyle: "split", panelOpened: true } }),
+      )
+      localStorage.setItem(
+        "opencode.global.dat:review-panel-v2",
+        JSON.stringify({ sidebarOpened: true, sidebarWidth: 240, expandMode: "collapse" }),
+      )
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify([{ type: "session", server, sessionId: sessionID }]),
+      )
+    },
+    { directory, server, sessionID },
+  )
+
+  await page.goto(`/server/${base64Encode(server)}/session/${sessionID}`)
+  await expectSessionTitle(page, title)
+
+  const panel = page.locator("#review-panel")
+  await panel.getByRole("button", { name: "Open file" }).click()
+  await expect(panel.getByRole("tab", { name: "Open file" })).toHaveAttribute("data-selected", "")
+
+  const sidebar = panel.locator('[data-component="session-review-v2-sidebar-root"]')
+  await expect(sidebar).toBeVisible()
+
+  const frontendRow = panel.locator('[data-slot="file-tree-v2-row"][data-path="frontend"]')
+  await expect(frontendRow).toBeVisible()
+  await expect(frontendRow).toHaveAttribute("aria-expanded", "false")
+  await frontendRow.click()
+  await expect(frontendRow).toHaveAttribute("aria-expanded", "true")
+
+  const appRow = panel.locator('[data-slot="file-tree-v2-row"][data-path="frontend/app.ts"]')
+  await expect(appRow).toBeVisible()
+  await appRow.click()
+  await expect(panel.getByRole("tab", { name: "app.ts" })).toHaveAttribute("data-selected", "")
+  await expect(panel.getByText("contents:frontend/app.ts", { exact: true })).toBeVisible()
+})

packages/app/e2e/regression/project-picker-recent-search.spec.ts

@@ -0,0 +1,60 @@
+import { expect, test } from "@playwright/test"
+import type { Page } from "@playwright/test"
+import { fixture, pageMessages } from "../smoke/session-timeline.fixture"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectAppVisible } from "../utils/waits"
+
+const NAMES = ["alpha-service", "bravo-web", "charlie-api", "delta-tools", "echo-infra", "foxtrot-docs"]
+const worktrees = NAMES.map((name) => `/opencode-demo/${name}`)
+
+// The sixth project sits outside the five-item recent cap, so it is only reachable if the
+// dialog hands every recent project to the list filter instead of a pre-truncated slice.
+const OUTSIDE_CAP = "foxtrot-docs"
+
+// Dialog rows carry data-directory-path; the sidebar project list does not, so this
+// scopes assertions to the picker instead of matching the sidebar entry of the same name.
+const rows = (page: Page) => page.locator("[data-directory-path]")
+const row = (page: Page, name: string) => page.locator(`[data-directory-path*="${name}"]`)
+
+async function openProjectDialog(page: Page) {
+  await mockOpenCodeServer(page, {
+    sessions: fixture.sessions,
+    provider: fixture.provider,
+    directory: fixture.directory,
+    project: fixture.project,
+    pageMessages,
+    fileList: () => [],
+    findFiles: () => [],
+  })
+  await page.addInitScript((dirs) => {
+    localStorage.setItem(
+      "opencode.global.dat:server",
+      JSON.stringify({
+        projects: { local: dirs.map((worktree: string) => ({ worktree, expanded: false })) },
+        lastProject: {},
+      }),
+    )
+  }, worktrees)
+  await page.goto("/")
+  const add = page.getByRole("button", { name: "Add project" }).first()
+  await expectAppVisible(add)
+  await add.click()
+  await expect(rows(page)).toHaveCount(5)
+  return page.getByRole("textbox").last()
+}
+
+test("searches every recent project, not just the five most recent", async ({ page }) => {
+  const search = await openProjectDialog(page)
+  await expect(row(page, OUTSIDE_CAP)).toHaveCount(0)
+
+  await search.fill("foxtrot")
+
+  await expect(row(page, OUTSIDE_CAP)).toHaveCount(1)
+})
+
+test("still caps the idle recent list at five projects", async ({ page }) => {
+  await openProjectDialog(page)
+
+  await expect(row(page, NAMES[4])).toHaveCount(1)
+  await expect(row(page, OUTSIDE_CAP)).toHaveCount(0)
+})

packages/app/e2e/regression/prompt-input-v2-command-draft.spec.ts

@@ -0,0 +1,50 @@
+import { expect, test } from "@playwright/test"
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectAppVisible } from "../utils/waits"
+
+const directory = "C:/OpenCode/PromptInputV2Editing"
+const projectID = "proj_prompt_input_v2_editing"
+const sessionID = "ses_prompt_input_v2_editing"
+
+test("preserves the draft when a populated command menu triggers a built-in", async ({ page }) => {
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: projectID,
+      worktree: directory,
+      vcs: "git",
+      name: "prompt-input-v2-editing",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: { all: [], connected: [], default: {} },
+    sessions: [
+      {
+        id: sessionID,
+        slug: "prompt-input-v2-editing",
+        projectID,
+        directory,
+        title: "Prompt input V2 editing",
+        version: "dev",
+        time: { created: 1700000000000, updated: 1700000000000 },
+      },
+    ],
+    pageMessages: () => ({ items: [] }),
+  })
+  await page.addInitScript(() => {
+    localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+  })
+
+  await page.goto(`/${base64Encode(directory)}/session/${sessionID}`)
+  const composer = page.locator('[data-component="prompt-input-v2"]')
+  const input = composer.locator('[data-component="prompt-input"]')
+  await expectAppVisible(composer)
+
+  await input.fill("keep me")
+  await composer.getByRole("button", { name: "Add images and files" }).click()
+  await page.getByRole("menuitem", { name: "Commands" }).click()
+  await page.locator('[data-suggestion-id="model.choose"]').click()
+
+  await expect(input).toHaveText("keep me")
+})

packages/app/e2e/regression/prompt-thinking-level.spec.ts

@@ -54,19 +54,16 @@ test("shows the V2 thinking level control while relevant", async ({ page }) => {
   })
 
   await page.goto(`/${base64Encode(directory)}/session/${sessionID}`)
-  const composer = page.locator('[data-component="session-composer"]')
+  const composer = page.locator('[data-component="prompt-input-v2"]')
   const input = composer.locator('[data-component="prompt-input"]')
-  const control = composer.locator('[data-component="prompt-variant-control"]')
+  const control = composer.getByRole("button", { name: "Choose model variant" })
   await expectAppVisible(composer)
 
   await idleComposer(page)
-  await expect(control).toBeHidden()
-
-  await composer.hover()
   await expect(control).toBeVisible()
 
-  await control.locator('[data-action="prompt-model-variant"]').click()
-  const high = page.getByRole("option", { name: "high" })
+  await control.click()
+  const high = page.getByRole("menuitemradio", { name: "high" })
   await expect(high).toBeVisible()
   await page.mouse.move(0, 0)
   await expect(control).toBeVisible()

packages/app/e2e/regression/remote-session-settings.spec.ts

@@ -0,0 +1,302 @@
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { expect, test, type Page, type Route } from "@playwright/test"
+import { installSseTransport } from "../utils/sse-transport"
+import { currentSession } from "../utils/mock-server"
+
+const serverA = "http://127.0.0.1:4096"
+const serverB = "http://127.0.0.1:4097"
+const directoryA = "C:/server-a"
+const directoryB = "/home/server-b"
+const sessionA = session("ses_server_a", directoryA, "Server A session")
+const childSessionA = { ...session("ses_server_a_child", directoryA, "Server A child session"), parentID: sessionA.id }
+const sessionB = session("ses_server_b", directoryB, "Server B session")
+
+test("session settings use the remote server context", async ({ page }) => {
+  const permissionRequests: string[] = []
+  await mockServers(page, permissionRequests)
+  await configureServers(page)
+
+  await page.goto(`/server/${base64Encode(serverB)}/session/${sessionB.id}`)
+  await expect(page.getByText(sessionB.title).first()).toBeVisible()
+  await page.keyboard.press("Control+,")
+
+  const dialog = page.locator(".settings-v2-dialog")
+  const autoAccept = dialog.locator('[data-action="settings-auto-accept-permissions"]')
+  const input = autoAccept.getByRole("switch")
+  await expect(autoAccept).toBeVisible()
+  await expect(input).toBeEnabled()
+  permissionRequests.length = 0
+  await autoAccept.locator('[data-slot="switch-control"]').click()
+  await expect(input).toBeChecked()
+  await expect
+    .poll(() =>
+      permissionRequests.some((request) => {
+        const url = new URL(request)
+        return url.origin === serverB && url.searchParams.get("directory") === directoryB
+      }),
+    )
+    .toBe(true)
+  expect(permissionRequests.every((request) => new URL(request).origin === serverB)).toBe(true)
+
+  await dialog.getByRole("tab", { name: "Models" }).click()
+  await expect(dialog.getByRole("switch", { name: "Server B Model" })).toBeEnabled()
+  await expect(dialog.getByRole("switch", { name: "Server A Model" })).toHaveCount(0)
+})
+
+test("auto-accept responds for an unfocused server session", async ({ page }) => {
+  const permissionRequests: string[] = []
+  const permissionResponses: PermissionResponse[] = []
+  const transport = await installSseTransport<{ directory: string; payload: Record<string, unknown> }>(page, {
+    server: serverA,
+    retry: 20,
+  })
+  await mockServers(page, permissionRequests, permissionResponses)
+  await configureServers(page, [
+    { type: "session", server: serverA, sessionId: sessionA.id },
+    { type: "session", server: serverB, sessionId: sessionB.id },
+  ])
+
+  const hrefB = `/server/${base64Encode(serverB)}/session/${sessionB.id}`
+  await page.goto(`/server/${base64Encode(serverA)}/session/${sessionA.id}`)
+  await expect(page.getByText(sessionA.title).first()).toBeVisible()
+  await page.keyboard.press("Control+,")
+  const autoAccept = page.locator(".settings-v2-dialog").locator('[data-action="settings-auto-accept-permissions"]')
+  await autoAccept.locator('[data-slot="switch-control"]').click()
+  await expect(autoAccept.getByRole("switch")).toBeChecked()
+  await expect
+    .poll(() =>
+      permissionRequests.some((request) => {
+        const url = new URL(request)
+        return url.origin === serverA && url.searchParams.get("directory") === directoryA
+      }),
+    )
+    .toBe(true)
+  await page.keyboard.press("Escape")
+
+  await page.locator(`[data-titlebar-tab-slot]:has(a[href="${hrefB}"])`).click()
+  await expect(page).toHaveURL(new RegExp(`${hrefB.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}$`))
+  await expect(page.getByText(sessionB.title).first()).toBeVisible()
+  await transport.waitForConnection()
+
+  await transport.send({
+    directory: directoryA,
+    payload: {
+      id: "event-permission-background-a",
+      type: "permission.asked",
+      properties: {
+        id: "permission-background-a",
+        sessionID: sessionA.id,
+        permission: "bash",
+        patterns: ["git status"],
+        metadata: {},
+        always: [],
+      },
+    },
+  })
+
+  await expect
+    .poll(() => permissionResponses)
+    .toEqual([
+      {
+        origin: serverA,
+        directory: directoryA,
+        sessionID: sessionA.id,
+        permissionID: "permission-background-a",
+        body: { response: "once" },
+      },
+    ])
+
+  await transport.send({
+    directory: directoryA,
+    payload: {
+      id: "event-permission-background-a-child",
+      type: "permission.asked",
+      properties: {
+        id: "permission-background-a-child",
+        sessionID: childSessionA.id,
+        permission: "bash",
+        patterns: ["git diff"],
+        metadata: {},
+        always: [],
+      },
+    },
+  })
+
+  await expect
+    .poll(() => permissionResponses)
+    .toEqual([
+      {
+        origin: serverA,
+        directory: directoryA,
+        sessionID: sessionA.id,
+        permissionID: "permission-background-a",
+        body: { response: "once" },
+      },
+      {
+        origin: serverA,
+        directory: directoryA,
+        sessionID: childSessionA.id,
+        permissionID: "permission-background-a-child",
+        body: { response: "once" },
+      },
+    ])
+})
+
+type PermissionResponse = {
+  origin: string
+  directory?: string
+  sessionID: string
+  permissionID: string
+  body: unknown
+}
+
+async function configureServers(page: Page, tabs: { type: "session"; server: string; sessionId: string }[] = []) {
+  await page.addInitScript(
+    ({ serverB, tabs }) => {
+      localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+      localStorage.setItem("opencode.global.dat:server", JSON.stringify({ list: [serverB] }))
+      localStorage.setItem("opencode.window.browser.dat:tabs", JSON.stringify(tabs))
+    },
+    { serverB, tabs },
+  )
+}
+
+async function mockServers(page: Page, permissionRequests: string[], permissionResponses: PermissionResponse[] = []) {
+  await page.route("**/*", async (route) => {
+    const url = new URL(route.request().url())
+    if (url.origin !== serverA && url.origin !== serverB) return route.fallback()
+    const remote = url.origin === serverB
+    const directory = remote ? directoryB : directoryA
+    const sessions = remote ? [sessionB] : [sessionA, childSessionA]
+    const requestDirectory = url.searchParams.get("directory")
+    const response = url.pathname.match(/^\/session\/([^/]+)\/permissions\/([^/]+)$/)
+    if (route.request().method() === "POST" && response) {
+      permissionResponses.push({
+        origin: url.origin,
+        directory: requestDirectory ?? undefined,
+        sessionID: response[1]!,
+        permissionID: response[2]!,
+        body: route.request().postDataJSON(),
+      })
+      return json(route, true)
+    }
+    if (requestDirectory && requestDirectory !== directory) return json(route, { name: "InvalidDirectory" }, 500)
+    if (url.pathname === "/global/event" || url.pathname === "/event" || url.pathname === "/api/event")
+      return sse(route)
+    if (url.pathname === "/global/health") return json(route, { healthy: true })
+    if (url.pathname === "/api/provider" || url.pathname === "/api/model" || url.pathname === "/api/agent")
+      return json(route, { data: [] })
+    if (url.pathname === "/api/model/default") return json(route, { data: null })
+    if (["/api/command", "/api/reference", "/api/permission/request", "/api/question/request"].includes(url.pathname))
+      return json(route, { location: { directory }, data: [] })
+    if (url.pathname === "/api/mcp") return json(route, { location: { directory }, data: [] })
+    if (url.pathname === "/api/mcp/resource")
+      return json(route, { location: { directory }, data: { resources: [], templates: [] } })
+    if (url.pathname === "/api/project") {
+      return json(route, [
+        {
+          id: remote ? sessionB.projectID : "project-server-a",
+          worktree: directory,
+          vcs: "git",
+          time: { created: 1, updated: 1 },
+          sandboxes: [],
+        },
+      ])
+    }
+    if (url.pathname === "/api/project/current")
+      return json(route, { id: remote ? sessionB.projectID : "project-server-a", directory })
+    if (url.pathname === "/api/session") return json(route, { data: sessions.map(currentSession), cursor: {} })
+    if (url.pathname === "/api/session/active") return json(route, { data: {} })
+    const currentSessionInfo = sessions.find((session) => url.pathname === `/api/session/${session.id}`)
+    if (currentSessionInfo) return json(route, { data: currentSession(currentSessionInfo) })
+    if (sessions.some((session) => url.pathname === `/api/session/${session.id}/message`))
+      return json(route, { data: [], cursor: {} })
+    const current = sessions.find((session) => url.pathname === `/session/${session.id}`)
+    if (current) return json(route, current)
+    if (/^\/session\/[^/]+$/.test(url.pathname)) return json(route, { name: "NotFoundError" }, 404)
+    if (/^\/session\/[^/]+\/message$/.test(url.pathname)) return json(route, [])
+    if (/^\/session\/[^/]+\/(children|todo|diff)$/.test(url.pathname)) return json(route, [])
+    if (url.pathname === "/permission") {
+      permissionRequests.push(url.toString())
+      return json(route, [])
+    }
+    if (["/skill", "/command", "/lsp", "/formatter", "/question", "/vcs/diff", "/pty/shells"].includes(url.pathname))
+      return json(route, [])
+    if (["/global/config", "/config", "/provider/auth", "/mcp"].includes(url.pathname)) return json(route, {})
+    if (url.pathname === "/provider") return json(route, provider(remote ? "server-b" : "server-a"))
+    if (url.pathname === "/agent") return json(route, [{ name: "build", mode: "primary" }])
+    if (url.pathname === "/project" || url.pathname === "/project/current") {
+      const project = {
+        id: remote ? sessionB.projectID : "project-server-a",
+        worktree: directory,
+        vcs: "git",
+        time: { created: 1, updated: 1 },
+        sandboxes: [],
+      }
+      return json(route, url.pathname === "/project" ? [project] : project)
+    }
+    if (url.pathname === "/path")
+      return json(route, {
+        state: directory,
+        config: directory,
+        worktree: directory,
+        directory,
+        home: directory,
+      })
+    if (url.pathname === "/api/path")
+      return json(route, { state: directory, config: directory, worktree: directory, directory, home: directory })
+    if (url.pathname === "/vcs") return json(route, { branch: "main", default_branch: "main" })
+    if (url.pathname === "/api/vcs")
+      return json(route, { location: { directory }, data: { branch: "main", defaultBranch: "main" } })
+    if (url.pathname === "/api/pty/shells") return json(route, { location: { directory }, data: [] })
+    return json(route, {})
+  })
+}
+
+function session(id: string, directory: string, title: string) {
+  return {
+    id,
+    slug: id,
+    projectID: `project-${id}`,
+    directory,
+    title,
+    version: "dev",
+    time: { created: 1, updated: 1 },
+  }
+}
+
+function provider(id: string) {
+  const name = id === "server-b" ? "Server B" : "Server A"
+  return {
+    all: [
+      {
+        id,
+        name: `${name} Provider`,
+        models: {
+          [id]: {
+            id,
+            name: `${name} Model`,
+            family: id,
+            release_date: "2026-01-01",
+            limit: { context: 200_000 },
+          },
+        },
+      },
+    ],
+    connected: [id],
+    default: { providerID: id, modelID: id },
+  }
+}
+
+function json(route: Route, body: unknown, status = 200) {
+  return route.fulfill({
+    status,
+    contentType: "application/json",
+    headers: { "access-control-allow-origin": "*" },
+    body: JSON.stringify(body),
+  })
+}
+
+function sse(route: Route) {
+  return route.fulfill({ status: 200, contentType: "text/event-stream", body: ": ok\n\n" })
+}

packages/app/e2e/regression/remote-tab-busy.spec.ts

@@ -0,0 +1,131 @@
+import { expect, test, type Page, type Route } from "@playwright/test"
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { currentSession } from "../utils/mock-server"
+
+const serverA = "http://127.0.0.1:4096"
+const serverB = "http://127.0.0.1:4097"
+const sessionA = session("ses_server_a", "C:/server-a", "Server A session")
+const sessionB = session("ses_server_b", "/home/server-b", "Server B session")
+
+test("tab busy indicator reflects the tab server's own session status", async ({ page }) => {
+  await mockServers(page)
+  await page.addInitScript(
+    ({ serverA, serverB, sessionA, sessionB }) => {
+      localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+      localStorage.setItem("opencode.global.dat:server", JSON.stringify({ list: [serverB] }))
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify([
+          { type: "session", server: serverA, sessionId: sessionA },
+          { type: "session", server: serverB, sessionId: sessionB },
+        ]),
+      )
+    },
+    { serverA, serverB, sessionA: sessionA.id, sessionB: sessionB.id },
+  )
+
+  const hrefA = `/server/${base64Encode(serverA)}/session/${sessionA.id}`
+  const hrefB = `/server/${base64Encode(serverB)}/session/${sessionB.id}`
+  await page.goto(hrefA)
+  await expect(page.getByText(sessionA.title).first()).toBeVisible()
+
+  // Session B is busy on server B while server A stays the active server, so the
+  // busy indicator must come from the tab server's status, not the active server's.
+  const tabB = page.locator(`[data-titlebar-tab-slot]:has(a[href="${hrefB}"])`)
+  await expect(tabB.locator('[data-component="session-progress-indicator-v2"]')).toBeVisible()
+
+  const tabA = page.locator(`[data-titlebar-tab-slot]:has(a[href="${hrefA}"])`)
+  await expect(tabA.locator("[data-titlebar-tab-title]")).toHaveText(sessionA.title)
+  await expect(tabA.locator('[data-component="session-progress-indicator-v2"]')).toHaveCount(0)
+})
+
+function session(id: string, directory: string, title: string) {
+  return {
+    id,
+    slug: id,
+    projectID: `project-${id}`,
+    directory,
+    title,
+    version: "dev",
+    time: { created: 1, updated: 1 },
+  }
+}
+
+async function mockServers(page: Page) {
+  await page.route("**/*", async (route) => {
+    const url = new URL(route.request().url())
+    if (url.origin !== serverA && url.origin !== serverB) return route.fallback()
+    const current = url.origin === serverA ? sessionA : sessionB
+    const directory = url.searchParams.get("directory")
+    if (directory && directory !== current.directory) return json(route, { name: "InvalidDirectory" }, 500)
+    if (url.pathname === "/global/event" || url.pathname === "/event" || url.pathname === "/api/event")
+      return sse(route, url.pathname === "/api/event")
+    if (url.pathname === "/global/health") return json(route, {}, 404)
+    if (url.pathname === "/api/health") return json(route, { pid: 1 })
+    if (url.pathname === "/api/session/active")
+      return json(route, { data: url.origin === serverB ? { [sessionB.id]: { type: "running" } } : {} })
+    if (url.pathname === "/api/session") return json(route, { data: [currentSession(current)], cursor: {} })
+    if (url.pathname === `/api/session/${current.id}`) return json(route, { data: currentSession(current) })
+    if (url.pathname === `/api/session/${current.id}/message`) return json(route, { data: [], cursor: {} })
+    if (url.pathname === `/session/${current.id}`) return json(route, current)
+    if (/^\/session\/[^/]+$/.test(url.pathname)) return json(route, { name: "NotFoundError" }, 404)
+    if (url.pathname === `/session/${current.id}/message`) return json(route, [])
+    if (/^\/session\/[^/]+\/(children|todo|diff)$/.test(url.pathname)) return json(route, [])
+    if (["/skill", "/command", "/lsp", "/formatter", "/permission", "/question", "/vcs/diff"].includes(url.pathname))
+      return json(route, [])
+    if (["/global/config", "/config", "/provider/auth", "/mcp"].includes(url.pathname)) return json(route, {})
+    if (url.pathname === "/provider")
+      return json(route, { all: [], connected: [], default: { providerID: "", modelID: "" } })
+    if (url.pathname === "/agent") return json(route, [{ name: "build", mode: "primary" }])
+    if (url.pathname === "/project" || url.pathname === "/project/current") {
+      const project = {
+        id: current.projectID,
+        worktree: current.directory,
+        vcs: "git",
+        time: { created: 1, updated: 1 },
+        sandboxes: [],
+      }
+      return json(route, url.pathname === "/project" ? [project] : project)
+    }
+    if (url.pathname === "/path")
+      return json(route, {
+        state: current.directory,
+        config: current.directory,
+        worktree: current.directory,
+        directory: current.directory,
+        home: current.directory,
+      })
+    if (url.pathname === "/api/path")
+      return json(route, {
+        state: current.directory,
+        config: current.directory,
+        worktree: current.directory,
+        directory: current.directory,
+        home: current.directory,
+      })
+    if (url.pathname === "/vcs") return json(route, { branch: "main", default_branch: "main" })
+    if (url.pathname === "/api/vcs")
+      return json(route, {
+        location: { directory: current.directory },
+        data: { branch: "main", defaultBranch: "main" },
+      })
+    return json(route, {})
+  })
+}
+
+function json(route: Route, body: unknown, status = 200) {
+  return route.fulfill({
+    status,
+    contentType: "application/json",
+    headers: { "access-control-allow-origin": "*" },
+    body: JSON.stringify(body),
+  })
+}
+
+function sse(route: Route, current: boolean) {
+  return route.fulfill({
+    status: 200,
+    contentType: "text/event-stream",
+    body: current ? 'data: {"id":"evt_connected","type":"server.connected","data":{}}\n\n' : ": ok\n\n",
+  })
+}

packages/app/e2e/regression/review-image-flash.spec.ts

@@ -0,0 +1,202 @@
+import { expect, test, type Page } from "@playwright/test"
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectAppVisible, expectSessionTitle } from "../utils/waits"
+
+const directory = "C:/OpenCode/ReviewImageFlashRegression"
+const sessionID = "ses_review_image_flash_regression"
+const title = "Review image flash regression"
+const imageFile = "assets/preview.png"
+
+test("clicking an image file in the v2 review pane does not blank the panel", async ({ page }) => {
+  await openReview(page)
+  await installReviewFlashProbe(page)
+
+  await page.getByRole("button", { name: /preview\.png/ }).click()
+  await waitForReviewFlashProbe(page, 400)
+  const trace = await collectReviewFlashProbe(page)
+  const bad = trace.samples.filter((sample) => sample.blank || sample.blackCenter)
+
+  expect(trace.samples.length).toBeGreaterThan(0)
+  expect(
+    bad,
+    JSON.stringify({ bad: bad.slice(0, 8), first: trace.samples.slice(0, 8), last: trace.samples.slice(-4) }, null, 2),
+  ).toEqual([])
+})
+
+async function openReview(page: Page) {
+  await page.setViewportSize({ width: 960, height: 900 })
+  await page.addInitScript(() => {
+    localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+  })
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: "proj_review_image_flash_regression",
+      worktree: directory,
+      vcs: "git",
+      name: "review-image-flash-regression",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: { all: [], connected: [], default: {} },
+    sessions: [
+      {
+        id: sessionID,
+        slug: "review-image-flash-regression",
+        projectID: "proj_review_image_flash_regression",
+        directory,
+        title,
+        version: "dev",
+        time: { created: 1700000000000, updated: 1700000000000 },
+      },
+    ],
+    vcsDiff: [
+      {
+        file: "src/example.ts",
+        additions: 1,
+        deletions: 1,
+        status: "modified",
+        patch:
+          "diff --git a/src/example.ts b/src/example.ts\n--- a/src/example.ts\n+++ b/src/example.ts\n@@ -1 +1 @@\n-export const value = 'before'\n+export const value = 'after'\n",
+      },
+      {
+        file: imageFile,
+        patch: "",
+        additions: 1,
+        deletions: 0,
+        status: "added",
+      },
+    ],
+    fileContent: async (path) => {
+      if (path !== imageFile) return undefined
+      await new Promise((resolve) => setTimeout(resolve, 250))
+      return {
+        type: "binary",
+        content: "iVBORw0KGgo=",
+        encoding: "base64",
+        mimeType: "image/png",
+      }
+    },
+    fileList: (path) => {
+      if (!path) {
+        return [
+          { name: "assets", path: "assets", absolute: `${directory}/assets`, type: "directory", ignored: false },
+          { name: "src", path: "src", absolute: `${directory}/src`, type: "directory", ignored: false },
+        ]
+      }
+      if (path === "assets") {
+        return [
+          {
+            name: "preview.png",
+            path: imageFile,
+            absolute: `${directory}/${imageFile}`,
+            type: "file",
+            ignored: false,
+          },
+        ]
+      }
+      if (path === "src") {
+        return [
+          {
+            name: "example.ts",
+            path: "src/example.ts",
+            absolute: `${directory}/src/example.ts`,
+            type: "file",
+            ignored: false,
+          },
+        ]
+      }
+      return []
+    },
+    pageMessages: () => ({
+      items: [
+        {
+          info: {
+            id: "msg_review_image_flash_regression",
+            sessionID,
+            role: "user",
+            time: { created: 1700000000000 },
+            summary: { diffs: [] },
+            agent: "build",
+            model: { providerID: "opencode", modelID: "test" },
+          },
+          parts: [
+            {
+              id: "prt_review_image_flash_regression",
+              sessionID,
+              messageID: "msg_review_image_flash_regression",
+              type: "text",
+              text: "Review this change.",
+            },
+          ],
+        },
+      ],
+    }),
+  })
+
+  await page.goto(`/${base64Encode(directory)}/session/${sessionID}`)
+  await expectSessionTitle(page, title)
+  await page.getByRole("button", { name: "Toggle review" }).click()
+  await expectAppVisible(page.locator('#review-panel [data-component="session-review-v2"]'))
+  await expectAppVisible(page.getByRole("button", { name: /preview\.png/ }))
+}
+
+async function installReviewFlashProbe(page: Page) {
+  await page.evaluate(() => {
+    const samples: Array<{
+      observedAtMs: number
+      blank: boolean
+      blackCenter: boolean
+      text: string
+      background: string
+    }> = []
+    const startedAt = performance.now()
+    const sample = () => {
+      const panel = document.querySelector<HTMLElement>('#review-panel [data-component="session-review-v2"]')
+      const rect = panel?.getBoundingClientRect()
+      const center = rect
+        ? document.elementFromPoint(rect.left + rect.width / 2, rect.top + rect.height / 2)
+        : undefined
+      const background = center instanceof Element ? getComputedStyle(center).backgroundColor : ""
+      samples.push({
+        observedAtMs: performance.now() - startedAt,
+        blank: !panel || panel.textContent?.trim().length === 0,
+        blackCenter: background === "rgb(0, 0, 0)",
+        text: panel?.textContent?.trim().slice(0, 80) ?? "",
+        background,
+      })
+      if (performance.now() - startedAt < 500) requestAnimationFrame(sample)
+    }
+    document.addEventListener(
+      "click",
+      (event) => {
+        const target = event.target instanceof Element ? event.target : undefined
+        if (!target?.closest('[data-slot="file-tree-v2-row"]')) return
+        requestAnimationFrame(sample)
+      },
+      { capture: true, once: true },
+    )
+    ;(window as Window & { __reviewImageFlash?: { samples: typeof samples; startedAt: number } }).__reviewImageFlash = {
+      samples,
+      startedAt,
+    }
+  })
+}
+
+async function waitForReviewFlashProbe(page: Page, durationMs: number) {
+  await page.waitForFunction((durationMs) => {
+    const state = (window as Window & { __reviewImageFlash?: { samples: unknown[]; startedAt: number } })
+      .__reviewImageFlash
+    return !!state && state.samples.length > 0 && performance.now() - state.startedAt >= durationMs
+  }, durationMs)
+}
+
+async function collectReviewFlashProbe(page: Page) {
+  return page.evaluate(() => {
+    return (window as Window & { __reviewImageFlash?: { samples: unknown[]; startedAt: number } }).__reviewImageFlash!
+  }) as Promise<{
+    startedAt: number
+    samples: Array<{ observedAtMs: number; blank: boolean; blackCenter: boolean; text: string; background: string }>
+  }>
+}

packages/app/e2e/regression/review-line-comment.spec.ts

@@ -18,6 +18,7 @@ test("opens the comment editor when code is clicked", async ({ page }) => {
   await line.click()
 
   await expect(review.getByRole("textbox")).toBeVisible()
+  await expect(review.locator('[data-slot="line-comment-editor-label"]')).toHaveText("Commenting on line 2")
 })
 
 test("opens the comment editor when a line number is clicked", async ({ page }) => {
@@ -27,6 +28,7 @@ test("opens the comment editor when a line number is clicked", async ({ page })
   await lineNumber.click()
 
   await expect(review.getByRole("textbox")).toBeVisible()
+  await expect(review.locator('[data-slot="line-comment-editor-label"]')).toHaveText("Commenting on line 1")
 })
 
 test("opens the comment editor for a line number range", async ({ page }) => {
@@ -36,15 +38,10 @@ test("opens the comment editor for a line number range", async ({ page }) => {
   await expectAppVisible(start)
   await expectAppVisible(end)
 
-  const from = await start.boundingBox()
-  const to = await end.boundingBox()
-  if (!from || !to) throw new Error("Missing line number bounds")
-  await page.mouse.move(from.x + from.width / 2, from.y + from.height / 2)
-  await page.mouse.down()
-  await page.mouse.move(to.x + to.width / 2, to.y + to.height / 2)
-  await page.mouse.up()
+  await start.dragTo(end)
 
   await expect(review.getByRole("textbox")).toBeVisible()
+  await expect(review.locator('[data-slot="line-comment-editor-label"]')).toHaveText("Commenting on lines 1-3")
 })
 
 test("shows a comment button when a line number is hovered", async ({ page }) => {
@@ -54,36 +51,44 @@ test("shows a comment button when a line number is hovered", async ({ page }) =>
 
   const comment = review.getByRole("button", { name: "Comment", exact: true })
   await expect(async () => {
-    await page.mouse.move(0, 0)
     await lineNumber.hover()
-    await expect(comment).toBeVisible({ timeout: 500 })
-    await comment.click({ timeout: 500 })
-  }).toPass()
+    await expect(lineNumber).toHaveAttribute("data-hovered", "")
+    await expect(comment).toHaveCount(1)
+    await expect(comment).toHaveCSS("pointer-events", "auto")
+    await comment.focus()
+    await expect(comment).toBeFocused()
+  }).toPass({ timeout: 10_000 })
+  await comment.press("Enter")
   await expect(review.getByRole("textbox")).toBeVisible()
+  await expect(review.locator('[data-slot="line-comment-editor-label"]')).toHaveText("Commenting on line 1")
 })
 
 test("stages a submitted line comment in the prompt context", async ({ page }) => {
-  const requests: string[] = []
   page.on("request", (request) => {
-    if (request.method() !== "GET") requests.push(`${request.method()} ${new URL(request.url()).pathname}`)
+    expect.soft(request.method(), `unexpected ${request.method()} ${new URL(request.url()).pathname}`).toBe("GET")
   })
 
   const review = page.locator('[data-component="session-review"]')
   await review.getByText("export const value = 'after'", { exact: true }).click()
-  await review.getByRole("textbox").fill("Use the existing value instead")
-  await review.locator('[data-slot="line-comment-action"][data-variant="primary"]').click()
+  const textbox = review.getByRole("textbox")
+  await expect(textbox).toBeVisible()
+  await expect(review.locator('[data-slot="line-comment-editor-label"]')).toHaveText("Commenting on line 2")
+  await textbox.fill("Use the existing value instead")
+  const submit = review.locator('[data-slot="line-comment-action"][data-variant="primary"]')
+  await expect(submit).toBeEnabled()
+  await submit.click()
 
   await expect(review.getByText("Use the existing value instead", { exact: true })).toBeVisible()
   await page.getByRole("tab", { name: "Session" }).click()
   const context = page.getByText("Use the existing value instead", { exact: true }).last()
   await expect(context).toBeVisible()
   await expect(context.locator("..")).toContainText("review.ts:2")
-  expect(requests).toEqual([])
 })
 
 async function openReview(page: Page) {
   await page.setViewportSize({ width: 700, height: 900 })
   await mockOpenCodeServer(page, {
+    protocol: "v2",
     directory,
     project: {
       id: "proj_review_line_comment_regression",
@@ -143,15 +148,22 @@ async function openReview(page: Page) {
 
   await page.goto(`/${base64Encode(directory)}/session/${sessionID}`)
   await expectSessionTitle(page, title)
-  const diffResponse = page.waitForResponse((response) => new URL(response.url()).pathname === "/vcs/diff")
-  await page.getByRole("tab", { name: "Changes" }).click()
-  expect(await (await diffResponse).json()).toHaveLength(1)
+  const changes = page.getByRole("tab", { name: "Changes" })
+  const diffResponse = page.waitForResponse(
+    (response) =>
+      response.request().method() === "GET" && response.ok() && new URL(response.url()).pathname === "/api/vcs/diff",
+  )
+  await changes.click()
+  expect((await (await diffResponse).json()).data).toHaveLength(1)
+  await expect(page.getByRole("tab", { selected: true })).toHaveAccessibleName(/Files Changed/)
 
   const review = page.locator('[data-component="session-review"]')
   await expectAppVisible(review)
-  await review
-    .getByRole("heading", { name: /review\.ts/ })
-    .getByRole("button")
-    .first()
-    .click()
+  const file = review.locator('[data-file="src/review.ts"]')
+  await expectAppVisible(file)
+  const trigger = file.getByRole("button", { expanded: false })
+  await expect(trigger).toHaveCount(1)
+  await trigger.click()
+  await expect(file.getByRole("button", { expanded: true })).toBeVisible()
+  await expect(file.getByText("export const value = 'after'", { exact: true })).toBeVisible()
 }

packages/app/e2e/regression/review-open-file.spec.ts

@@ -0,0 +1,163 @@
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { expect, test } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectSessionTitle } from "../utils/waits"
+
+const directory = "C:/OpenCode/ReviewOpenFile"
+const projectID = "proj_review_open_file"
+const sessionID = "ses_review_open_file"
+const title = "Review open file"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+
+test.use({ viewport: { width: 1440, height: 900 } })
+
+test("opens and searches project files inline", async ({ page }) => {
+  const searches: { query: string; dirs?: string; limit?: number }[] = []
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: projectID,
+      worktree: directory,
+      vcs: "git",
+      name: "open-file-project",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: {
+      all: [
+        {
+          id: "opencode",
+          name: "OpenCode",
+          models: { test: { id: "test", name: "Test", limit: { context: 200_000 } } },
+        },
+      ],
+      connected: ["opencode"],
+      default: { providerID: "opencode", modelID: "test" },
+    },
+    sessions: [
+      {
+        id: sessionID,
+        slug: sessionID,
+        projectID,
+        directory,
+        title,
+        version: "dev",
+        time: { created: 1700000000000, updated: 1700000000000 },
+      },
+    ],
+    vcsDiff: [fileDiff("src/changed.ts")],
+    fileList: (path) => {
+      if (path) return []
+      return [
+        fileNode("README.md"),
+        { name: "src", path: "src", absolute: `${directory}/src`, type: "directory", ignored: false },
+      ]
+    },
+    fileContent: (path) => ({ type: "text", content: `contents:${path}` }),
+    findFiles: (input) => {
+      searches.push(input)
+      return input.query === "nested" ? ["src/nested.ts"] : []
+    },
+    pageMessages: () => ({ items: [] }),
+  })
+  await page.addInitScript(
+    ({ directory, server, sessionID }) => {
+      localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+      localStorage.setItem(
+        "opencode.global.dat:server",
+        JSON.stringify({
+          projects: { local: [{ worktree: directory, expanded: true }] },
+          lastProject: { local: directory },
+        }),
+      )
+      localStorage.setItem(
+        "opencode.global.dat:layout",
+        JSON.stringify({ review: { diffStyle: "split", panelOpened: true } }),
+      )
+      localStorage.setItem(
+        "opencode.global.dat:review-panel-v2",
+        JSON.stringify({ sidebarOpened: false, sidebarWidth: 240, expandMode: "collapse" }),
+      )
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify([{ type: "session", server, sessionId: sessionID }]),
+      )
+    },
+    { directory, server, sessionID },
+  )
+
+  await page.goto(`/server/${base64Encode(server)}/session/${sessionID}`)
+  await expectSessionTitle(page, title)
+
+  const panel = page.locator("#review-panel")
+  const sidebar = panel.locator('[data-slot="session-review-v2-sidebar"]')
+  const sidebarToggle = panel.getByRole("button", { name: "Toggle file tree" })
+  const contextButton = page.getByRole("button", { name: "View context usage" })
+  await contextButton.click()
+  await expect(panel.getByRole("tab", { name: "Context" })).toHaveAttribute("data-selected", "")
+  await panel.getByRole("button", { name: "Open file" }).click()
+  await expect(panel.getByRole("tab", { name: "Open file" })).toHaveAttribute("data-selected", "")
+  await expect(sidebarToggle).toBeDisabled()
+  await expect(sidebar).toBeVisible()
+  await contextButton.click()
+  await expect(panel.getByRole("tab", { name: "Context" })).toHaveAttribute("data-selected", "")
+  await expect(sidebar).toBeHidden()
+  await panel.getByRole("button", { name: "Open file" }).click()
+  const filter = panel.getByRole("combobox", { name: "Filter files" })
+  await expect(filter).toBeFocused()
+  await expect(panel.getByRole("tab", { name: "Open file" })).toHaveAttribute("data-selected", "")
+  await expect(panel.getByText("open-file-project", { exact: true })).toBeVisible()
+
+  await panel.getByRole("button", { name: "README.md" }).click()
+  await expect(panel.getByRole("tab", { name: "README.md" })).toHaveAttribute("data-selected", "")
+  await expect(sidebarToggle).toBeEnabled()
+  await expect(panel.getByText("contents:README.md", { exact: true })).toBeVisible()
+  await expect(sidebar).toHaveCount(0)
+
+  await panel.getByRole("button", { name: "Open file" }).click()
+  await expect(panel.getByRole("tab", { name: "README.md" })).toHaveCount(0)
+  await expect(sidebar).toBeVisible()
+  await filter.fill("nested")
+  const result = panel.getByRole("option", { name: /nested\.ts/ })
+  await expect(result).toBeVisible()
+  const resultID = await result.getAttribute("id")
+  expect(resultID).toBeTruthy()
+  await expect(filter).toHaveAttribute("aria-activedescendant", resultID!)
+  await filter.press("Enter")
+  await expect(panel.getByRole("tab", { name: "nested.ts" })).toHaveAttribute("data-selected", "")
+  await expect(sidebarToggle).toBeEnabled()
+  await expect(panel.getByText("contents:src/nested.ts", { exact: true })).toBeVisible()
+  expect(searches).toContainEqual({ query: "nested", dirs: "false", limit: 200 })
+
+  await panel.getByRole("button", { name: "Open file" }).click()
+  await expect(panel.getByRole("tab", { name: "nested.ts" })).toHaveCount(1)
+  await expect(panel.getByRole("tab", { name: "Open file" })).toHaveAttribute("data-selected", "")
+  await expect(sidebarToggle).toBeDisabled()
+  await panel.locator("#session-side-panel-review-tab").click()
+  await expect(sidebarToggle).toBeEnabled()
+  await panel.getByRole("tab", { name: "Open file" }).click()
+  await page.keyboard.press("Control+w")
+  await expect(panel.getByRole("tab", { name: "Open file" })).toHaveCount(0)
+  await expect(panel.getByRole("tab", { name: "nested.ts" })).toHaveAttribute("data-selected", "")
+})
+
+function fileNode(path: string) {
+  return {
+    name: path,
+    path,
+    absolute: `${directory}/${path}`,
+    type: "file",
+    ignored: false,
+  }
+}
+
+function fileDiff(file: string) {
+  return {
+    file,
+    before: "before\n",
+    after: "after\n",
+    additions: 1,
+    deletions: 1,
+    status: "modified",
+  }
+}

packages/app/e2e/regression/review-state-persistence.spec.ts

@@ -0,0 +1,153 @@
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { expect, test, type Page } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectSessionTitle } from "../utils/waits"
+
+const directory = "C:/OpenCode/ReviewStatePersistence"
+const projectID = "proj_review_state_persistence"
+const sessionA = "ses_review_state_a"
+const sessionB = "ses_review_state_b"
+const titleA = "Alpha review state"
+const titleB = "Beta review state"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+
+test.use({ viewport: { width: 1440, height: 900 } })
+
+test("restores review mode and selected file per session", async ({ page }) => {
+  await setup(page)
+  await page.goto(sessionHref(sessionA))
+  await expectSessionTitle(page, titleA)
+  await page.getByRole("button", { name: "Toggle review" }).click()
+
+  await selectMode(page, "Git changes", "Branch changes")
+  await selectFile(page, "beta.ts")
+
+  await switchSession(page, titleB)
+  await expect(page.getByRole("button", { name: "Git changes" })).toBeVisible()
+  await selectFile(page, "gamma.ts")
+
+  await switchSession(page, titleA)
+  await expect(page.getByRole("button", { name: "Branch changes" })).toBeVisible()
+  await expectSelectedFile(page, "beta.ts")
+  await selectMode(page, "Branch changes", "Git changes")
+  await expectSelectedFile(page, "alpha.ts")
+  await selectMode(page, "Git changes", "Branch changes")
+  await expectSelectedFile(page, "beta.ts")
+
+  await page.reload()
+  await expectSessionTitle(page, titleA)
+  await expect(page.getByRole("button", { name: "Branch changes" })).toBeVisible()
+  await expectSelectedFile(page, "beta.ts")
+
+  await switchSession(page, titleB)
+  await expect(page.getByRole("button", { name: "Git changes" })).toBeVisible()
+  await expectSelectedFile(page, "gamma.ts")
+})
+
+async function selectMode(page: Page, current: string, next: string) {
+  await page.getByRole("button", { name: current }).click()
+  await page.getByRole("option", { name: next }).dispatchEvent("click")
+}
+
+async function selectFile(page: Page, file: string) {
+  await page.getByRole("button", { name: file }).click()
+  await expectSelectedFile(page, file)
+}
+
+async function expectSelectedFile(page: Page, file: string) {
+  await expect(page.locator('[data-slot="session-review-v2-file-name"]')).toHaveText(file)
+}
+
+async function switchSession(page: Page, title: string) {
+  await page.locator("[data-titlebar-tab-slot]", { hasText: title }).click()
+  await expectSessionTitle(page, title)
+}
+
+async function setup(page: Page) {
+  await mockOpenCodeServer(page, {
+    protocol: "v1",
+    directory,
+    project: {
+      id: projectID,
+      worktree: directory,
+      vcs: "git",
+      name: "review-state-persistence",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: {
+      all: [
+        {
+          id: "opencode",
+          name: "OpenCode",
+          models: { test: { id: "test", name: "Test", limit: { context: 200_000 } } },
+        },
+      ],
+      connected: ["opencode"],
+      default: { providerID: "opencode", modelID: "test" },
+    },
+    sessions: [session(sessionA, titleA, 1700000000000), session(sessionB, titleB, 1700000001000)],
+    pageMessages: () => ({ items: [] }),
+  })
+  await page.route(/\/vcs(?:\?.*)?$/, (route) =>
+    route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify({ branch: "feature", default_branch: "dev" }),
+    }),
+  )
+  await page.route("**/vcs/diff**", (route) =>
+    route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify(
+        new URL(route.request().url()).searchParams.get("mode") === "branch"
+          ? [diff("src/alpha.ts"), diff("src/beta.ts")]
+          : [diff("src/alpha.ts"), diff("src/gamma.ts")],
+      ),
+    }),
+  )
+  await page.addInitScript(
+    ({ directory, server, sessions }) => {
+      localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+      localStorage.setItem(
+        "opencode.global.dat:server",
+        JSON.stringify({
+          projects: { local: [{ worktree: directory, expanded: true }] },
+          lastProject: { local: directory },
+        }),
+      )
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify(sessions.map((sessionId: string) => ({ type: "session", server, sessionId }))),
+      )
+    },
+    { directory, server, sessions: [sessionA, sessionB] },
+  )
+}
+
+function session(id: string, title: string, created: number) {
+  return {
+    id,
+    slug: id,
+    projectID,
+    directory,
+    title,
+    version: "dev",
+    time: { created, updated: created },
+  }
+}
+
+function diff(file: string) {
+  return {
+    file,
+    additions: 1,
+    deletions: 1,
+    status: "modified",
+    patch: `diff --git a/${file} b/${file}\n--- a/${file}\n+++ b/${file}\n@@ -1 +1 @@\n-export const value = 'before'\n+export const value = 'after'\n`,
+  }
+}
+
+function sessionHref(sessionID: string) {
+  return `/server/${base64Encode(server)}/session/${sessionID}`
+}

packages/app/e2e/regression/review-tab-switch.spec.ts

@@ -0,0 +1,147 @@
+import { base64Encode } from "@opencode-ai/core/util/encode"
+import { expect, test, type Page } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectAppVisible, expectSessionTitle } from "../utils/waits"
+
+const directory = "C:/OpenCode/ReviewTabSwitch"
+const projectID = "proj_review_tab_switch"
+const sessionA = "ses_review_tab_a"
+const sessionB = "ses_review_tab_b"
+const titleA = "Alpha session"
+const titleB = "Beta session"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+const diffs = Array.from({ length: 2_740 }, (_, index) =>
+  fileDiff(`src/generated-${String(index).padStart(4, "0")}.ts`),
+)
+// Marks the review pane DOM node so a remount (fresh node) is detectable.
+const PROBE = "original"
+
+test.use({ viewport: { width: 1440, height: 900 } })
+
+// The v2 review pane's diff data is workspace-scoped: switching between session
+// tabs in the same workspace must update its parameters reactively instead of
+// tearing the pane down and remounting it (which flickers).
+test("keeps the v2 review pane mounted when switching session tabs in a workspace", async ({ page }) => {
+  await setup(page)
+
+  await page.goto(sessionHref(sessionA))
+  await expectSessionTitle(page, titleA)
+
+  await page.getByRole("button", { name: "Toggle review" }).click()
+  const reviewTab = page.locator("#session-side-panel-review-tab")
+  const reviewTabPanel = page.locator("#session-side-panel-review-tabpanel")
+  await expect(reviewTab).toHaveAttribute("aria-controls", "session-side-panel-review-tabpanel")
+  await expect(reviewTabPanel).toHaveAttribute("id", "session-side-panel-review-tabpanel")
+  const review = page.locator('#review-panel [data-component="session-review-v2"]')
+  await expectAppVisible(review)
+  await expectAppVisible(page.getByRole("button", { name: "generated-0000.ts" }))
+  await writeProbe(page)
+
+  await switchTab(page, titleB)
+  await expectSessionTitle(page, titleB)
+  await expectAppVisible(review)
+  await expectAppVisible(page.getByRole("button", { name: "generated-0000.ts" }))
+  expect(await readProbe(page)).toBe(PROBE)
+
+  await switchTab(page, titleA)
+  await expectSessionTitle(page, titleA)
+  await expectAppVisible(review)
+  await expectAppVisible(page.getByRole("button", { name: "generated-0000.ts" }))
+  expect(await readProbe(page)).toBe(PROBE)
+
+  const viewport = page.locator('#review-panel [data-slot="session-review-v2-sidebar-tree"] .scroll-view__viewport')
+  await viewport.hover()
+  await page.mouse.wheel(0, 100_000)
+  await expect
+    .poll(() => viewport.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop))
+    .toBeLessThanOrEqual(1)
+  await expect(page.getByRole("button", { name: "generated-2739.ts" })).toBeVisible()
+})
+
+type Probed = HTMLElement & { __e2eProbe?: string }
+
+async function switchTab(page: Page, title: string) {
+  await page.locator("[data-titlebar-tab-slot]", { hasText: title }).click()
+}
+
+async function writeProbe(page: Page) {
+  await page.locator('#review-panel [data-component="session-review-v2"]').evaluate((el, probe) => {
+    ;(el as Probed).__e2eProbe = probe
+  }, PROBE)
+}
+
+async function readProbe(page: Page) {
+  return page.locator('#review-panel [data-component="session-review-v2"]').evaluate((el) => (el as Probed).__e2eProbe)
+}
+
+async function setup(page: Page) {
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: projectID,
+      worktree: directory,
+      vcs: "git",
+      name: "review-tab-switch",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: {
+      all: [
+        {
+          id: "opencode",
+          name: "OpenCode",
+          models: { test: { id: "test", name: "Test", limit: { context: 200_000 } } },
+        },
+      ],
+      connected: ["opencode"],
+      default: { providerID: "opencode", modelID: "test" },
+    },
+    sessions: [session(sessionA, titleA, 1700000000000), session(sessionB, titleB, 1700000001000)],
+    vcsDiff: diffs,
+    pageMessages: () => ({ items: [] }),
+  })
+
+  await page.addInitScript(
+    ({ directory, server, sessions }) => {
+      localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+      localStorage.setItem(
+        "opencode.global.dat:server",
+        JSON.stringify({
+          projects: { local: [{ worktree: directory, expanded: true }] },
+          lastProject: { local: directory },
+        }),
+      )
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify(sessions.map((sessionId: string) => ({ type: "session", server, sessionId }))),
+      )
+    },
+    { directory, server, sessions: [sessionA, sessionB] },
+  )
+}
+
+function session(id: string, title: string, created: number) {
+  return {
+    id,
+    slug: id,
+    projectID,
+    directory,
+    title,
+    version: "dev",
+    time: { created, updated: created },
+  }
+}
+
+function sessionHref(sessionID: string) {
+  return `/server/${base64Encode(server)}/session/${sessionID}`
+}
+
+function fileDiff(file: string) {
+  return {
+    file,
+    additions: 1,
+    deletions: 1,
+    status: "modified",
+    patch: `diff --git a/${file} b/${file}\n--- a/${file}\n+++ b/${file}\n@@ -1 +1 @@\n-export const value = 'before'\n+export const value = 'after'\n`,
+  }
+}

packages/app/e2e/regression/review-terminal-stacked.spec.ts

@@ -0,0 +1,306 @@
+import { expect, test, type Page } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+import { expectSessionTitle } from "../utils/waits"
+
+const directory = "C:/OpenCode/ReviewTerminalStacked"
+const projectID = "proj_review_terminal_stacked"
+const sessionID = "ses_review_terminal_stacked"
+const title = "Review terminal stacked"
+const branchDiffs = [
+  fileDiff(".github/actions/setup-bun/action.yml", 7),
+  ...Array.from({ length: 2_739 }, (_, index) =>
+    fileDiff(
+      `src/branch/d${String(Math.floor(index / 100)).padStart(5, "0")}/generated-${String(index).padStart(4, "0")}.ts`,
+      100,
+      false,
+    ),
+  ),
+]
+
+test("keeps the review tree and terminal sized when both panels are open", async ({ page }) => {
+  test.setTimeout(120_000)
+  const events: Array<{ directory: string; payload: Record<string, unknown> }> = []
+  const sessionStatus = { [sessionID]: { type: "idle" as "busy" | "idle" } }
+  let detailVersion = 1
+  let detailFailures = 1
+  await page.setViewportSize({ width: 1400, height: 900 })
+  await mockOpenCodeServer(page, {
+    protocol: "v1",
+    directory,
+    project: {
+      id: projectID,
+      worktree: directory,
+      vcs: "git",
+      name: "review-terminal-stacked",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes: [],
+    },
+    provider: {
+      all: [
+        {
+          id: "opencode",
+          name: "OpenCode",
+          models: { test: { id: "test", name: "Test", limit: { context: 200_000 } } },
+        },
+      ],
+      connected: ["opencode"],
+      default: { providerID: "opencode", modelID: "test" },
+    },
+    sessions: [
+      {
+        id: sessionID,
+        slug: "review-terminal-stacked",
+        projectID,
+        directory,
+        title,
+        version: "dev",
+        time: { created: 1700000000000, updated: 1700000000000 },
+      },
+    ],
+    sessionStatus: () => sessionStatus,
+    pageMessages: () => ({ items: [] }),
+    events: () => events.splice(0, 1),
+    eventRetry: 16,
+  })
+  await page.route(/\/vcs(?:\?.*)?$/, (route) =>
+    route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify({
+        branch: "review-pane-performance",
+        default_branch: "dev",
+      }),
+    }),
+  )
+  await page.route("**/vcs/diff**", (route) => {
+    const url = new URL(route.request().url())
+    const scope = url.searchParams.get("directory")?.replaceAll("\\", "/")
+    const detail = scope?.endsWith("/src/branch/d00027")
+    if (detail && detailFailures-- > 0) return route.fulfill({ status: 500, body: "retry detail" })
+    return route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify(
+        url.searchParams.get("mode") === "branch"
+          ? detail
+            ? branchDiffs
+                .filter((diff) => diff.file.startsWith("src/branch/d00027/"))
+                .map((diff) => fileDiff(diff.file, diff.additions, true, detailVersion))
+            : branchDiffs
+          : Array.from({ length: 7 }, (_, index) => fileDiff(`src/git-${index}.ts`, 1)),
+      ),
+    })
+  })
+  await page.route("**/pty*", (route) =>
+    route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify({
+        location: { directory, project: { id: projectID, directory } },
+        data: {
+          id: "pty_review_terminal",
+          title: "Terminal 1",
+          command: "cmd.exe",
+          args: [],
+          cwd: directory,
+          status: "running",
+          pid: 1,
+        },
+      }),
+    }),
+  )
+  await page.route("**/pty/pty_review_terminal*", (route) =>
+    route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify({
+        location: { directory, project: { id: projectID, directory } },
+        data: {
+          id: "pty_review_terminal",
+          title: "Terminal 1",
+          command: "cmd.exe",
+          args: [],
+          cwd: directory,
+          status: "running",
+          pid: 1,
+        },
+      }),
+    }),
+  )
+  await page.route("**/pty/pty_review_terminal/connect-token*", (route) =>
+    route.fulfill({
+      status: 200,
+      contentType: "application/json",
+      body: JSON.stringify({
+        location: { directory, project: { id: projectID, directory } },
+        data: { ticket: "e2e-ticket", expires_in: 60 },
+      }),
+    }),
+  )
+  await page.routeWebSocket("**/pty/pty_review_terminal/connect", () => undefined)
+  await page.addInitScript(() => {
+    localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
+    localStorage.setItem(
+      "opencode.global.dat:layout",
+      JSON.stringify({ review: { diffStyle: "split", panelOpened: true } }),
+    )
+  })
+
+  await page.goto(`/${base64Encode(directory)}/session/${sessionID}`)
+  await expectSessionTitle(page, title)
+  await expect(page.locator("#review-panel")).toBeVisible()
+  await expectTree(page, 8, "git-0.ts")
+
+  await selectMode(page, "Git changes", "Branch changes")
+  await expect(page.locator("#session-side-panel-review-tab")).toHaveText("Files Changed 2740")
+  await page.keyboard.press("Control+Backquote")
+  await expect(page.locator("#terminal-panel")).toBeVisible()
+  await expectTree(page, 2_773, "action.yml")
+  await expectStackGeometry(page)
+
+  const treeViewport = page.locator('#review-panel [data-slot="session-review-v2-sidebar-tree"] .scroll-view__viewport')
+  await treeViewport.hover()
+  await page.mouse.wheel(0, 100_000)
+  await expect
+    .poll(() => treeViewport.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop))
+    .toBeLessThanOrEqual(1)
+  const lastFile = page.getByRole("button", { name: "generated-2738.ts" })
+  await expect(lastFile).toBeVisible()
+  const bottomGap = await lastFile.evaluate((element) => {
+    const viewport = element.closest<HTMLElement>(".scroll-view__viewport")!.getBoundingClientRect()
+    return viewport.bottom - element.getBoundingClientRect().bottom
+  })
+  expect(bottomGap).toBeGreaterThanOrEqual(0)
+  expect(bottomGap).toBeLessThanOrEqual(16)
+  const lazyDiff = page.waitForRequest((request) => {
+    const url = new URL(request.url())
+    return (
+      url.pathname === "/vcs/diff" &&
+      url.searchParams.get("directory")?.replaceAll("\\", "/").endsWith("/src/branch/d00027") === true
+    )
+  })
+  await lastFile.click()
+  await lazyDiff
+  const preview = page.locator('[data-slot="session-review-v2-diff-scroll"]')
+  await expect(preview).toContainText("after-1")
+  detailVersion = 2
+  sessionStatus[sessionID] = { type: "busy" }
+  events.push(statusEvent("busy"))
+  await expect(page.getByRole("button", { name: "Stop" })).toBeVisible()
+  const refreshedDiff = page.waitForRequest((request) => {
+    const url = new URL(request.url())
+    return (
+      url.pathname === "/vcs/diff" &&
+      url.searchParams.get("directory")?.replaceAll("\\", "/").endsWith("/src/branch/d00027") === true
+    )
+  })
+  sessionStatus[sessionID] = { type: "idle" }
+  events.push(statusEvent("idle"))
+  await refreshedDiff
+  await expect(preview).toContainText("after-2")
+  await selectMode(page, "Branch changes", "Git changes")
+  await expectTree(page, 8, "git-0.ts")
+  await page.getByRole("button", { name: "git-0.ts" }).click()
+  await selectMode(page, "Git changes", "Branch changes")
+  await expectTree(page, 2_773, "action.yml")
+
+  const filter = page.getByRole("searchbox", { name: "Filter files" })
+  await filter.fill("generated-2738")
+  await expectTree(page, 1, "generated-2738.ts")
+  await filter.fill("")
+  await expectTree(page, 2_773, "action.yml")
+
+  await page.getByRole("button", { name: "Toggle file tree" }).click()
+  await expect(page.locator('[data-slot="session-review-v2-sidebar"]')).toHaveCount(0)
+  await expect(page.locator('#review-panel [data-component="file-tree-v2"]')).toHaveCount(0)
+  await page.getByRole("button", { name: "Toggle file tree" }).click()
+  await expectTree(page, 2_773, "action.yml")
+
+  await page.keyboard.press("Control+Backquote")
+  await expect(page.locator("#terminal-panel")).toHaveCount(0)
+  await expectTree(page, 2_773, "action.yml")
+  await page.keyboard.press("Control+Backquote")
+  await expect(page.locator("#terminal-panel")).toBeVisible()
+  await expectTree(page, 2_773, "action.yml")
+
+  await page.getByRole("button", { name: "Toggle review" }).click()
+  await expect(page.locator("#review-panel")).toHaveCount(0)
+  await page.getByRole("button", { name: "Toggle review" }).click()
+  await expectTree(page, 2_773, "action.yml")
+  await page.setViewportSize({ width: 1_000, height: 700 })
+  await expectTree(page, 2_773, "action.yml")
+  await expectStackGeometry(page)
+  await page.setViewportSize({ width: 1_000, height: 120 })
+  await page.setViewportSize({ width: 1_400, height: 900 })
+  await expectTree(page, 2_773, "action.yml")
+  await expectStackGeometry(page)
+})
+
+async function selectMode(page: Page, current: string, next: string) {
+  await page.getByRole("button", { name: current }).click()
+  const option = page.getByRole("option", { name: next })
+  await expect(option).toBeVisible()
+  await option.click()
+}
+
+async function expectTree(page: Page, total: number, file: string) {
+  await expectMountedTree(page, total)
+  await expect(page.getByRole("button", { name: file })).toBeVisible()
+}
+
+async function expectMountedTree(page: Page, total: number) {
+  const tree = page.locator('#review-panel [data-component="file-tree-v2"]')
+  await expect(tree).toHaveAttribute("data-total-rows", String(total))
+  await expect
+    .poll(() => tree.evaluate((element) => element.querySelectorAll('[data-slot="file-tree-v2-row"]').length))
+    .toBeGreaterThan(0)
+  const state = await tree.evaluate((element) => ({
+    root: element.getBoundingClientRect().height,
+    viewport: element.closest<HTMLElement>(".scroll-view__viewport")!.getBoundingClientRect().height,
+    rows: element.querySelectorAll('[data-slot="file-tree-v2-row"]').length,
+  }))
+  expect(state.viewport).toBeGreaterThan(0)
+  expect(state.root).toBeGreaterThan(0)
+  expect(state.rows).toBeGreaterThan(0)
+  expect(state.rows).toBeLessThanOrEqual(60)
+}
+
+async function expectStackGeometry(page: Page) {
+  const geometry = await page.evaluate(() => {
+    const review = document.querySelector<HTMLElement>("#review-panel")!
+    const terminal = document.querySelector<HTMLElement>("#terminal-panel")!
+    const reviewParent = review.parentElement!.getBoundingClientRect()
+    const terminalParent = terminal.parentElement!.getBoundingClientRect()
+    return {
+      review: review.getBoundingClientRect().height,
+      reviewParent: reviewParent.height,
+      terminal: terminal.getBoundingClientRect().height,
+      terminalParent: terminalParent.height,
+    }
+  })
+  expect(Math.abs(geometry.review - geometry.reviewParent)).toBeLessThanOrEqual(1)
+  expect(Math.abs(geometry.terminal - geometry.terminalParent)).toBeLessThanOrEqual(1)
+}
+
+function base64Encode(value: string) {
+  return Buffer.from(value, "utf8").toString("base64").replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g, "")
+}
+
+function statusEvent(type: "busy" | "idle") {
+  return {
+    directory,
+    payload: { type: "session.status", properties: { sessionID, status: { type } } },
+  }
+}
+
+function fileDiff(file: string, additions: number, loaded = true, version = 1) {
+  return {
+    file,
+    additions,
+    deletions: 0,
+    status: "modified",
+    patch: loaded
+      ? `diff --git a/${file} b/${file}\n--- a/${file}\n+++ b/${file}\n@@ -1 +1 @@\n-export const value = 'before'\n+export const value = 'after-${version}'\n`
+      : `diff --git a/${file} b/${file}\n--- a/${file}\n+++ b/${file}`,
+  }
+}