PR Review Assistant

AI-assisted review for your local branch changes in VS Code.

PR Review Assistant helps you inspect diffs, review file-by-file, and get concise AI feedback before opening a pull request.

Features

• Load local diff against a target branch (base...HEAD)
• Sidebar with changed files and review progress
• Side-by-side or unified diff view
• Inline AI feedback clips for selected changed lines
• Copy-ready feedback for GitHub comments
• Session summary across reviewed files
• Works locally (does not post to GitHub)

Quick Start

1. Open a git project in VS Code.
2. Open PR Review from the activity bar.
3. Click Load Diff.
4. (Optional) Click Set Target Branch to change base branch.
5. Open a file from Changed Files.
6. Run AI Review from the review panel or line-level review with +.

Commands

• PR Review: Load Diff
• PR Review: Set Target Branch
• PR Review: Show Branch Info
• PR Review: Open File Review
• PR Review: Run AI Review
• PR Review: Mark Reviewed
• PR Review: Next File
• PR Review: Generate Summary
• PR Review: Reset Session
• PR Review: Set OpenAI API key (fallback)
• PR Review: Clear OpenAI API key

Settings

{
  "prReview.baseBranch": "main",
  "prReview.reviewSpeedProfile": "balanced",
  "prReview.maxPatchChars": 12000,
  "prReview.segmentContextLines": 2,
  "prReview.segmentConcurrency": 2,
  "prReview.maxSegmentsPerFile": 16,
  "prReview.segmentMaxChangedLines": 60,
  "prReview.segmentOverlapLines": 8,
  "prReview.mapReduceThresholdSegments": 10,
  "prReview.batchConcurrencyMode": "auto",
  "prReview.batchConcurrency": 3,
  "prReview.ai.provider": "copilot-like",
  "prReview.ai.copilotVendor": "copilot",
  "prReview.ai.copilotFamily": "gpt-4o-mini",
  "prReview.ai.useOpenAiFallback": true,
  "prReview.ai.endpoint": "https://api.openai.com/v1",
  "prReview.ai.model": "gpt-4o-mini",
  "prReview.ai.temperature": 0.1,
  "prReview.navigation.highlightDurationMs": 2500
}

Notes:

• Set prReview.navigation.highlightDurationMs to 0 to disable jump highlighting.
• OpenAI-compatible API keys are stored securely using VS Code Secret Storage.
• prReview.reviewSpeedProfile: accurate (fuller/slower), balanced (default), fast (faster/partial allowed).
• Tune prReview.segmentMaxChangedLines for coverage vs speed (40-80 is a good range for most repos).
• Use prReview.segmentOverlapLines (for example 6-12) to reduce misses at segment boundaries.
• prReview.mapReduceThresholdSegments enables an extra consolidation pass for very large files.

AI Backend Order

When generating AI feedback, the extension resolves backend in this order:

1. VS Code Language Model API (copilotVendor + copilotFamily)
2. VS Code Language Model API (copilotVendor only)
3. Any available VS Code chat model
4. OpenAI-compatible fallback (if enabled and key is configured)
5. Local heuristic fallback

Troubleshooting

• No files shown after Load Diff: ensure workspace is a git repo and has changes against target branch.
• No AI response: verify Copilot/model availability, or configure OpenAI fallback + API key.
• Wrong comparison base: run PR Review: Set Target Branch.

Privacy

• Diff and review state are local to your workspace.
• The extension does not create GitHub comments or PRs.
• If OpenAI fallback is enabled, selected diff content is sent to your configured API endpoint.