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Make Reviewer Bot Stateful and Factually Accurate#2589

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Make Reviewer Bot Stateful and Factually Accurate#2589
google-labs-jules[bot] wants to merge 38 commits into
mainfrom
fix/reviewer-bot-consistency-98446873102345824

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@google-labs-jules

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This PR addresses the statelessness and factual inaccuracies of the GitHub Models code review bot.

Key improvements:

  • Stateful Reviews: The bot now fetches its own previous comment from the PR and passes it to the LLM. This allows the model to perform "Differential Review," acknowledging fixed issues and avoiding repetitive or contradictory feedback across PR iterations.
  • Knowledge Base: Added a repository-specific knowledge base to the system prompt to ground the LLM in facts about Tailwind v4 (max-h-none), numeric spacing tokens (e.g., 96), and custom tokens (viewport-half).
  • UX Enhancements: Updated the PR comment layout to include a prominent "Latest Verdict" (PASS/WARN/FAIL) indicator, making it easier for Jules and human reviewers to see the current status at a glance.
  • Testing: Added a new unit test suite for the getLatestPRComment utility to ensure reliable identification and fetching of previous review comments.

These changes directly resolve the observed problems where the reviewer would flip-flop on verdicts or flag valid repository patterns as bugs.

Fixes #2563


PR created automatically by Jules for task 98446873102345824 started by @arii

- Implemented state retrieval from PR comments to enable differential reviews.
- Added repository-specific Knowledge Base to the LLM system prompt.
- Improved report markdown with prominent verdict indicators.
- Added unit tests for new state retrieval utility.
@google-labs-jules

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👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

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I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

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For security, I will only act on instructions from the user who triggered this task.

@github-actions

github-actions Bot commented Jun 19, 2026

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🐙 GitHub Models Code Review

Powered by GitHub Models

Reviewing: PR #2589
Latest Verdict: ✅ PASS

Code Review Feedback

Differential Review

Acknowledgement of Previously Flagged Issues

  • Type Safety Issue: The previously flagged missing created_at field in the comment type for getLatestPRComment is now resolved. The function now includes created_at: string in its return type and uses it in the filtering logic.
  • Latest Comment Selection: The bug where getLatestPRComment returned the first matching comment (not the latest) is now fixed. The function now sorts by id descending and returns the latest bot comment matching the report title.
  • PATCH Response Handling: The PATCH logic in postPRComment now checks for updateResponse.ok and throws an error if the update fails, addressing the previously flagged silent failure.

Persistent or New HIGH Severity Issues

No persistent blocking bugs remain from the previous review.

No new blocking bugs are introduced in this diff.

  • Type Safety: All new/changed functions have correct types.
  • Stateful Review: The orchestration logic correctly fetches the previous review and passes it to the summary for the LLM.
  • Knowledge Base: The system prompt is correctly updated with repository-specific facts.
  • Verdict UX: The verdict emoji is correctly added to the markdown output.
  • Testing: The new unit test suite for getLatestPRComment covers all relevant cases, including error handling and multiple comments.

Final Verdict

All previously flagged blocking bugs are resolved. No new blocking bugs are introduced.

[VERDICT: PASS]


Generated by github-models-code-review

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🚀 Deployment Details (Last updated: Jun 19, 2026, 11:34 AM PST)

🚀 Pushed to gh-pages; publish in progress

- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- (Previously) Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions.
- Improved `postPRComment` error messages.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Verified that all previously flagged issues from the bot itself are now acknowledged and cleared using the new differential logic.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Verified that all previously flagged issues from the bot itself are now acknowledged and cleared using the new differential logic.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Verified that all previously flagged issues from the bot itself are now acknowledged and cleared using the new differential logic.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Verified that all previously flagged issues from the bot itself are now acknowledged and cleared using the new differential logic.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Verified that all previously flagged issues from the bot itself are now acknowledged and cleared using the new differential logic.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Verified that all previously flagged issues from the bot itself are now acknowledged and cleared using the new differential logic.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
- Verified that all previously flagged issues from the bot itself are now acknowledged and cleared using the new differential logic.
- Refactored `getLatestPRComment` to reliably return the most recent bot comment by sorting by ID descending.
- Added `created_at` to comment type definitions for better future-proofing.
- Improved `postPRComment` error messages for easier debugging of GitHub API failures.
- Fixed lint errors in unit tests by replacing `any` casts with proper Vitest `Mock` types.
- Expanded unit tests to verify correct identification of the latest comment among multiple candidates.
- Implemented differential review logic and repository knowledge base in the system prompt.
@arii

arii commented Jun 19, 2026

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Hi! This PR has merge conflicts with the base branch.

To fix this, please follow these steps:

  1. Ensure your local main branch is up to date.
  2. Switch back to your feature branch.
  3. Merge main into your branch.
  4. Resolve the conflicts in the files marked by Git, then stage the resolved files.
  5. Complete the merge commit.
  6. Push the resolved branch to origin.

Alternatively, you can rebase your branch onto main and resolve conflicts step-by-step. Let us know if you need any help!

…l diffs

- Implemented ReviewState persistence via hidden base64 HTML comments.
- Added incremental diff generation (git diff lastSha HEAD) to provide AI with fix verification context.
- Updated system prompt for Differential Reviews and repository-specific grounding.
- Added visible Review History table and Latest Verdict indicators to PR reports.
- Refactored getLatestPRComment with ID-descending sorting for reliable targeting.
- Added comprehensive unit tests for state management and retrieval logic.
- Resolved linting issues and confirmed type-safety.
- Added base64 state tag persistence in PR comments to track reviewed SHAs.
- Implemented incremental diff generation (git diff lastSha HEAD) for fix verification.
- Enhanced system prompt for Differential Reviews and repository Knowledge Base.
- Added visible Review History table and prominent Verdict indicators.
- Verified logic with unit tests and resolved merge conflicts.

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ANTI-AI-SLOP\n\n\n## FINDINGS\n\n\n## FINAL RECOMMENDATION\n<Approved | Approved with Minor Changes | Not Approved>\n\n

Inline Comments (Fallback due to Github line resolution errors)

  • :1:

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ANTI-AI-SLOP\n\n\n## FINDINGS\n\n\n## FINAL RECOMMENDATION\n<Approved | Approved with Minor Changes | Not Approved>\n\n

Inline Comments (Fallback due to Github line resolution errors)

  • :1:

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Automated Review for PR #2589

CI Status: All checks passing.

FINAL RECOMMENDATION

Approved

@arii

arii commented Jun 19, 2026

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🤖 AI Technical Audit

ANTI-AI-SLOP

  • The PR introduces significant architectural changes without sufficient separation of concerns, particularly in orchestrateCodeReview where state management and diff generation are tightly coupled.
  • Redundant trap logic in CI workflows adds unnecessary verbosity; use standard step outputs or cleaner shell wrapping.
  • The manual serialization of state via Buffer and Base64 in Markdown comments is a brittle pattern that risks hitting GitHub comment length limits and obfuscates data.
  • Logic within orchestrateVisualReview for auto-resolution based on 1.5% magic numbers is hardcoded; this should be a configuration constant.
  • Added excessive echo groups in CI; keep logs concise and relevant rather than adding overhead.

FINAL RECOMMENDATION

Approved with Minor Changes

Review automatically published via RepoAuditor.

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Automated Review for PR #2589

CI Status: All checks passing.

Recommendation: Everything looks good from a CI perspective. Ready for manual review/merge if no other concerns.

FINAL RECOMMENDATION

Approved

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Comprehensive Review for PR #2589

CI Status: All checks passing.

Recommendation: Everything looks good from a CI perspective. All tests and linters pass. Ready for manual review/merge if no other concerns.

FINAL RECOMMENDATION

Approved

google-labs-jules Bot and others added 2 commits June 19, 2026 15:06
- Changed countExistingReviews to count distinct bot comments to avoid premature quota limits on edited comments.
- Enhanced orchestrateCodeReview to skip redundant 'No code changes detected' updates if a review already exists.
- Updated AI prompt to handle empty incremental diffs explicitly.
- Fixed postPRComment signature and integrated formatReviewState for robust persistence in both code and visual reviews.
- Added unit tests for new state management and counting logic.
@arii arii closed this Jun 19, 2026
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Reviewer bot (GitHub Models code review) produces inconsistent, stateless feedback across PR iterations

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