AI Code Reviewer

Automated code review — security vulnerabilities, performance issues, best practices, refactoring suggestions, and documentation gaps. Supports Python, JavaScript/TypeScript, Go, Rust, and more. PR-ready review comments.

Comprehensive automated code reviews — security, performance, best practices, and refactoring suggestions.

What It Does

1. Security Scan — SQL injection, XSS, SSRF, secrets in code, insecure dependencies
2. Performance Analysis — N+1 queries, memory leaks, inefficient loops, caching opportunities
3. Best Practices — Code style, naming conventions, SOLID principles, DRY violations
4. Refactoring Suggestions — Concrete before/after code improvements
5. Documentation Gaps — Missing docstrings, unclear function names, no type hints
6. Complexity Analysis — Cyclomatic complexity, function length, nesting depth
7. PR-Ready Comments — Output formatted as pull request review comments

Usage

Full Code Review

text

Review this code for security, performance, and best practices:

Language: [Python/JavaScript/TypeScript/Go/Rust]
Context: [What does this code do?]
Priority: [Security first / Performance first / General review]

[Paste code or file path]

For each issue found:
1. Severity (critical/high/medium/low)
2. Category (security/performance/style/bug)
3. Line reference
4. What's wrong
5. How to fix (with corrected code)

Security-Focused Review

text

Security audit this code. I'm looking for:
- SQL injection vulnerabilities
- XSS attack vectors
- Authentication/authorization bypasses
- Secrets or credentials in code
- Insecure dependencies
- SSRF/CSRF vulnerabilities
- Input validation gaps

Language: [Language]
[Paste code]

Performance Review

text

Analyze this code for performance issues:
- Database query efficiency (N+1, missing indexes)
- Memory usage and potential leaks
- Algorithm complexity (can it be optimized?)
- Caching opportunities
- Async/concurrency improvements

Context: This handles [X requests/second] and processes [Y data]
[Paste code]

Refactoring Guide

text

Suggest refactoring improvements for this code:
- Reduce complexity
- Improve readability
- Apply design patterns where beneficial
- Remove duplication
- Improve testability

Show before/after for each suggestion.
[Paste code]

PR Review Format

text

Review this pull request diff:

[Paste diff or describe changes]

Output as PR comments:
- File: [filename]
- Line: [number]
- Comment: [review comment]
- Suggestion: [code suggestion if applicable]

Output Format

text

# Code Review Report

**Files Reviewed**: [count]
**Language**: [language]
**Overall Score**: [X/100]

## 🔴 Critical Issues ([count])

### Issue 1: [Title]
- **Severity**: Critical
- **Category**: Security
- **Location**: [file:line]
- **Problem**: [Description]
- **Impact**: [What could happen]
- **Fix**:
  ```[language]
  // Before (vulnerable)
  [old code]
  
  // After (fixed)
  [new code]

🟡 Warnings ([count])

[Medium-severity issues]

🔵 Suggestions ([count])

[Low-severity improvements]

🟢 Positive Observations

[What's already good about the code]

Summary

• Critical: [X] (must fix before merge)
• Warnings: [X] (should fix soon)
• Suggestions: [X] (nice to have)
• Score: [X/100]

text

## Supported Languages
- Python (3.8+)
- JavaScript / TypeScript
- Go
- Rust
- Ruby
- PHP
- Java / Kotlin
- C / C++
- Shell / Bash

## Best Practices

- Provide context about what the code does — better context = better review
- Specify your priority (security vs performance vs general)
- For large codebases, review one module/file at a time
- Pair with `security-auditor` for infrastructure-level security checks
- Use the PR format output to paste directly into GitHub/GitLab reviews

## References

- `references/security-patterns.md` — Common vulnerability patterns by language
- `references/performance-patterns.md` — Common performance anti-patterns