written by Forgecat
code-review
Automated code review for pull requests using multiple specialized agents with confidence-based scoring
Tags
- anthropic
- claude-official
- code-review
Installation
npx forgecat install @forgecat/anthropics_claude-plugins-official_code-review
Commands
- code-review — Code review a pull request
Details
Compatibility
Platforms
| Platform | Status |
|---|
| Claude Code | Tested |
| Cursor | Partial |
| Codex | Partial |
written by original source
Code Review Plugin
Automated code review for pull requests using multiple specialized agents with confidence-based scoring to filter false positives.
Overview
The Code Review Plugin automates pull request review by launching multiple agents in parallel to independently audit changes from different perspectives. It uses confidence scoring to filter out false positives, ensuring only high-quality, actionable feedback is posted.
Commands
/code-review
Performs automated code review on a pull request using multiple specialized agents.
What it does:
- Checks if review is needed (skips closed, draft, trivial, or already-reviewed PRs)
- Gathers relevant CLAUDE.md guideline files from the repository
- Summarizes the pull request changes
- Launches 4 parallel agents to independently review:
- Agents #1 & #2: Audit for CLAUDE.md compliance
- Agent #3: Scan for obvious bugs in changes
- Agent #4: Analyze git blame/history for context-based issues
- Scores each issue 0-100 for confidence level
- Filters out issues below 80 confidence threshold
- Posts review comment with high-confidence issues only
Usage:
/code-review
Example workflow:
# On a PR branch, run:
/code-review
# Claude will:
# - Launch 4 review agents in parallel
# - Score each issue for confidence
# - Post comment with issues ≥80 confidence
# - Skip posting if no high-confidence issues found
Features:
- Multiple independent agents for comprehensive review
- Confidence-based scoring reduces false positives (threshold: 80)
- CLAUDE.md compliance checking with explicit guideline verification
- Bug detection focused on changes (not pre-existing issues)
- Historical context analysis via git blame
- Automatic skipping of closed, draft, or already-reviewed PRs
- Links directly to code with full SHA and line ranges
Review comment format:
## Code review
Found 3 issues:
1. Missing error handling for OAuth callback (CLAUDE.md says "Always handle OAuth errors")
https://github.com/owner/repo/blob/abc123.../src/auth.ts#L67-L72
2. Memory leak: OAuth state not cleaned up (bug due to missing cleanup in finally block)
https://github.com/owner/repo/blob/abc123.../src/auth.ts#L88-L95
3. Inconsistent naming pattern (src/conventions/CLAUDE.md says "Use camelCase for functions")
https://github.com/owner/repo/blob/abc123.../src/utils.ts#L23-L28
Confidence scoring:
- 0: Not confident, false positive
- 25: Somewhat confident, might be real
- 50: Moderately confident, real but minor
- 75: Highly confident, real and important
- 100: Absolutely certain, definitely real
False positives filtered:
- Pre-existing issues not introduced in PR
- Code that looks like a bug but isn't
- Pedantic nitpicks
- Issues linters will catch
- General quality issues (unless in CLAUDE.md)
- Issues with lint ignore comments
Installation
This plugin is included in the Claude Code repository. The command is automatically available when using Claude Code.
Best Practices
Using /code-review
- Maintain clear CLAUDE.md files for better compliance checking
- Trust the 80+ confidence threshold - false positives are filtered
- Run on all non-trivial pull requests
- Review agent findings as a starting point for human review
- Update CLAUDE.md based on recurring review patterns
When to use
- All pull requests with meaningful changes
- PRs touching critical code paths
- PRs from multiple contributors
- PRs where guideline compliance matters
When not to use
- Closed or draft PRs (automatically skipped anyway)
- Trivial automated PRs (automatically skipped)
- Urgent hotfixes requiring immediate merge
- PRs already reviewed (automatically skipped)
Workflow Integration
Standard PR review workflow:
# Create PR with changes
/code-review
# Review the automated feedback
# Make any necessary fixes
# Merge when ready
As part of CI/CD:
# Trigger on PR creation or update
# Automatically posts review comments
# Skip if review already exists
Requirements
- Git repository with GitHub integration
- GitHub CLI (
gh) installed and authenticated
- CLAUDE.md files (optional but recommended for guideline checking)
Troubleshooting
Review takes too long
Issue: Agents are slow on large PRs
Solution:
- Normal for large changes - agents run in parallel
- 4 independent agents ensure thoroughness
- Consider splitting large PRs into smaller ones
Too many false positives
Issue: Review flags issues that aren't real
Solution:
- Default threshold is 80 (already filters most false positives)
- Make CLAUDE.md more specific about what matters
- Consider if the flagged issue is actually valid
No review comment posted
Issue: /code-review runs but no comment appears
Solution:
Check if:
- PR is closed (reviews skipped)
- PR is draft (reviews skipped)
- PR is trivial/automated (reviews skipped)
- PR already has review (reviews skipped)
- No issues scored ≥80 (no comment needed)
Link formatting broken
Issue: Code links don't render correctly in GitHub
Solution:
Links must follow this exact format:
https://github.com/owner/repo/blob/[full-sha]/path/file.ext#L[start]-L[end]
- Must use full SHA (not abbreviated)
- Must use
#L notation
- Must include line range with at least 1 line of context
GitHub CLI not working
Issue: gh commands fail
Solution:
- Install GitHub CLI:
brew install gh (macOS) or see GitHub CLI installation
- Authenticate:
gh auth login
- Verify repository has GitHub remote
Tips
- Write specific CLAUDE.md files: Clear guidelines = better reviews
- Include context in PRs: Helps agents understand intent
- Use confidence scores: Issues ≥80 are usually correct
- Iterate on guidelines: Update CLAUDE.md based on patterns
- Review automatically: Set up as part of PR workflow
- Trust the filtering: Threshold prevents noise
Configuration
Adjusting confidence threshold
The default threshold is 80. To adjust, modify the command file at commands/code-review.md:
Filter out any issues with a score less than 80.
Change 80 to your preferred threshold (0-100).
Customizing review focus
Edit commands/code-review.md to add or modify agent tasks:
- Add security-focused agents
- Add performance analysis agents
- Add accessibility checking agents
- Add documentation quality checks
Technical Details
Agent architecture
- 2x CLAUDE.md compliance agents: Redundancy for guideline checks
- 1x bug detector: Focused on obvious bugs in changes only
- 1x history analyzer: Context from git blame and history
- Nx confidence scorers: One per issue for independent scoring
Scoring system
- Each issue independently scored 0-100
- Scoring considers evidence strength and verification
- Threshold (default 80) filters low-confidence issues
- For CLAUDE.md issues: verifies guideline explicitly mentions it
GitHub integration
Uses gh CLI for:
- Viewing PR details and diffs
- Fetching repository data
- Reading git blame and history
- Posting review comments
Author
Boris Cherny (boris@anthropic.com)
Version
1.0.0
ForgeCat