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feat(chat): render themed HTML visualizations inline - #11460
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ApprovabilityVerdict: Not approved Macroscope's review found this PR not approvable — This PR introduces a substantial inline HTML rendering capability with sandboxing, sanitization, CSP bridges, provider-prompt changes, and a default change affecting assistant timeline messages. Its broad product and security surface requires human review. You can add or adjust custom eligibility rules. Learn more. |
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Path: .coderabbit.yaml Review profile: CHILL Plan: Advanced Run ID: 📥 CommitsReviewing files that changed from the base of the PR and between caa3d77a50d0cf14c0224ee6d9f38f189efde8d2 and cfd6c68. ⛔ Files ignored due to path filters (1)
📒 Files selected for processing (8)
🚧 Files skipped from review as they are similar to previous changes (1)
Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughThe PR adds opt-in ChangesHTML visualizations
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant AssistantTimelineRow
participant ChatMarkdown
participant HtmlVisualization
participant visualizationDocument
participant SandboxedIframe
AssistantTimelineRow->>ChatMarkdown: render assistant content with visualizations enabled
ChatMarkdown->>HtmlVisualization: render a complete valid t3-html fence
HtmlVisualization->>visualizationDocument: build sanitized document
visualizationDocument->>SandboxedIframe: mount CSP-restricted sandbox
SandboxedIframe-->>HtmlVisualization: send validated height and theme updates
Suggested reviewers: Merge Risk: ⚪ Minimal · up to The visualization sizing path now covers out-of-flow content, so no concrete merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 23.08% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 13 functions across 11 files. (3 skipped: 3 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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holy shit this is awesome |
maria-rcks
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Inline comments:
In `@apps/web/src/html-visualization.ts`:
- Line 31: Update the height measurement around HtmlVisualization to include
document overflow or descendant visual bounds, so visualizations containing only
absolutely positioned or fixed descendants receive their actual visible height
instead of 1 pixel. Add a regression test covering absolute-only content and
update MEASURE_HASH accordingly.
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📥 Commits
Reviewing files that changed from the base of the PR and between 0c77a0bdd7dc68eabe29bb49501e1f0ae01a5d4e and be8e855eb066cffe4ca3cbaacecf45c63736c9da.
📒 Files selected for processing (8)
apps/server/src/provider/Layers/CodexSessionRuntime.test.tsapps/server/src/provider/Layers/CodexSessionRuntime.tsapps/server/src/provider/RuntimeInstructions.tsapps/web/src/components/chat/HtmlVisualization.tsxapps/web/src/html-visualization.tsapps/web/tests/html-visualization.spec.tsdocs/internals/html-visualizations.mddocs/user/composer.md
🚧 Files skipped from review as they are similar to previous changes (3)
- apps/server/src/provider/RuntimeInstructions.ts
- docs/user/composer.md
- docs/internals/html-visualizations.md
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Thanks for the PR. We're not taking changes to the orchestration and provider layers right now: that part of the server is being rewritten for V2, and merging into the current code would either conflict with or be thrown away by that work. Closing for now. If this is still an issue once V2 lands, please reopen (or open a fresh PR against the new code) and we'll take a proper look. |
3 participants
assistant responses can render html/css charts in the timeline through a provider-agnostic
t3-htmlfence. visualizations follow chat colors and typography, resize with native interactions, and expose source and reset controls. mobile displays source.two opaque frames, sanitization, and restrictive csp isolate generated markup. fixed, hash-authorized application scripts measure content and relay theme values. generated javascript, navigation, and external resources remain blocked. codex receives the format through thread-level developer instructions, preserving user instructions. hostile html/css has no guaranteed cpu/gpu budget.
current takeover validation and recordings cover published head
cfd6c680ef16edebe43537394d644bd70aa2ba40, which includes the rebase and positioned-content height fix. github ci has passed.blacksmith verification: 10 chromium sandbox/security tests, 98 markdown/runtime tests, web/server typechecks, and scoped lint passed. real codex replies were exercised through the web client over the tailnet: keyboard-operated details, checkbox visibility, source/reset controls, light/dark appearance, and narrow layout. native desktop/mobile and non-chromium execution remain unverified.
before: the same provider-generated release plan displays as source with the main-branch renderer.
after: keyboard navigation expands the plan and a checkbox reveals its checklist.
before the height fix: a real provider reply with an absolutely positioned card inside a zero-height wrapper collapses its frame to 1px.
after the height fix: the same card receives a 260px frame and is visible in full.
implemented and reviewed with gpt-6-astra through codex.
Summary by CodeRabbit
New Features
t3-htmlcode blocks as inline HTML visualizations.Documentation
review status (2026-09-16): head
cfd6c680ef16edebe43537394d644bd70aa2ba40is published, all github checks completed successfully, no merge conflicts or unresolved review threads remain, and two independent source reviewers approved this head. ready for maintainer review. nothing has been merged.