Code Review

code-review

Category: Development

Usage

/code-review [<commit>] [--from <commit>] [--to <commit>]

Arguments

Examples

# Review all changes in current branch (from merge-base to HEAD)
/code-review

# Review a specific commit
/code-review abc1234

# Review a range of commits
/code-review --from abc1234 --to def5678

# Review changes since a specific commit
/code-review --from HEAD~5

# Review changes up to a specific commit
/code-review --to feature-branch

Execution Method

This command delegates to the code-review-expert agent (Haiku model) for fast, cost-effective execution.

Delegation: Use the Task tool with:

• subagent_type: "git-workflow:code-review-expert"
• model: "haiku"
• prompt: Include the commit range and current working directory

Example:

Task(subagent_type="git-workflow:code-review-expert", model="haiku", prompt="Review changes from abc1234 to HEAD in /path/to/repo")

Execution Instructions for Claude Code

When this command is run, Claude Code should:

1. Parse Arguments

SINGLE_COMMIT = first positional argument (if provided)
FROM = --from value or merge-base with main/master
TO = --to value or HEAD

If a single commit is provided:

• Review just that commit: FROM = <commit>^, TO = <commit>

If no arguments:

• FROM = merge-base with main (or master)
• TO = HEAD

2. Validate Commit References

# Verify commits exist
git rev-parse --verify "$FROM" 2>/dev/null
git rev-parse --verify "$TO" 2>/dev/null

If invalid, show error with suggestions.

3. Gather Change Information

# Get overview
git diff --stat $FROM..$TO

# Get commit history
git log --oneline $FROM..$TO

# Get full diff for analysis
git diff $FROM..$TO

4. Analyze Changes

Review each file's changes for:

Critical Issues (must fix)

• Security vulnerabilities (injection, XSS, auth bypass)
• Hardcoded secrets or credentials
• Data exposure risks

High Priority (should fix)

• Logic bugs and incorrect behavior
• Missing error handling
• Null reference issues
• Race conditions

Medium Priority (consider fixing)

• Performance issues (N+1 queries, inefficient loops)
• Code smells and maintainability issues
• Missing input validation

Low Priority (optional)

• Style inconsistencies
• Minor code improvements
• Documentation gaps

Test Coverage

• New code without corresponding tests
• Changed behavior without updated tests

5. Present Findings

Format output as:

Code Review: <from>..<to>
=========================

Files Changed: N (+X, -Y)
Commits: M

## Critical Issues
- [SECURITY] path/file.py:42 - SQL injection via unsanitized input

## High Priority
- [LOGIC] path/file.py:78 - Missing null check on user.profile

## Medium Priority
- [PERFORMANCE] path/file.py:120 - Queries in loop, consider batch fetch

## Low Priority
- [STYLE] path/file.py:15 - Inconsistent naming: userID vs user_id

## Test Coverage
- Missing tests for: new_feature() in path/file.py

## Suggestions
- Consider adding retry logic for external API calls

---
Overall: NEEDS_CHANGES | APPROVED_WITH_COMMENTS | APPROVED

6. Overall Assessment

• NEEDS_CHANGES: Critical or multiple high-priority issues found
• APPROVED_WITH_COMMENTS: Only medium/low issues, suggestions provided
• APPROVED: No significant issues found

What to Review

What NOT to Flag

• Subjective style preferences (unless inconsistent)
• Theoretical issues that can't happen in context
• Over-engineering suggestions
• Minor naming bikeshedding

Error Handling

No changes to review
  The commits $FROM and $TO are identical.

Invalid commit reference
  Could not find commit: abc1234
  Try: git log --oneline -20

Not a git repository
  Navigate to a git repository first.

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