anthropics/code-review
engineering/skills/code-review/SKILL.md
Review code changes for security, performance, and correctness. Trigger with a PR URL or diff, "review this before I merge", "is this code safe?", or when checking a change for N+1 queries, injection risks, missing edge cases, or error handling gaps.
$ install --global
skillsauthnpx skillsauth add anthropics/knowledge-work-plugins code-reviewInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 4, 2026, 2:15 PM4.2s1 file scanned
SKILL.md
- name:
- code-review
- description:
- Review code changes for security, performance, and correctness. Trigger with a PR URL or diff, "review this before I merge", "is this code safe?", or when checking a change for N+1 queries, injection risks, missing edge cases, or error handling gaps.
- argument-hint:
- <PR URL, diff, or file path>
/code-review
If you see unfamiliar placeholders or need to check which tools are connected, see CONNECTORS.md.
Review code changes with a structured lens on security, performance, correctness, and maintainability.
Usage
/code-review <PR URL or file path>
Review the provided code changes: @$1
If no specific file or URL is provided, ask what to review.
How It Works
┌─────────────────────────────────────────────────────────────────┐
│ CODE REVIEW │
├─────────────────────────────────────────────────────────────────┤
│ STANDALONE (always works) │
│ ✓ Paste a diff, PR URL, or point to files │
│ ✓ Security audit (OWASP top 10, injection, auth) │
│ ✓ Performance review (N+1, memory leaks, complexity) │
│ ✓ Correctness (edge cases, error handling, race conditions) │
│ ✓ Style (naming, structure, readability) │
│ ✓ Actionable suggestions with code examples │
├─────────────────────────────────────────────────────────────────┤
│ SUPERCHARGED (when you connect your tools) │
│ + Source control: Pull PR diff automatically │
│ + Project tracker: Link findings to tickets │
│ + Knowledge base: Check against team coding standards │
└─────────────────────────────────────────────────────────────────┘
Review Dimensions
Security
- SQL injection, XSS, CSRF
- Authentication and authorization flaws
- Secrets or credentials in code
- Insecure deserialization
- Path traversal
- SSRF
Performance
- N+1 queries
- Unnecessary memory allocations
- Algorithmic complexity (O(n²) in hot paths)
- Missing database indexes
- Unbounded queries or loops
- Resource leaks
Correctness
- Edge cases (empty input, null, overflow)
- Race conditions and concurrency issues
- Error handling and propagation
- Off-by-one errors
- Type safety
Maintainability
- Naming clarity
- Single responsibility
- Duplication
- Test coverage
- Documentation for non-obvious logic
Output
## Code Review: [PR title or file]
### Summary
[1-2 sentence overview of the changes and overall quality]
### Critical Issues
| # | File | Line | Issue | Severity |
|---|------|------|-------|----------|
| 1 | [file] | [line] | [description] | 🔴 Critical |
### Suggestions
| # | File | Line | Suggestion | Category |
|---|------|------|------------|----------|
| 1 | [file] | [line] | [description] | Performance |
### What Looks Good
- [Positive observations]
### Verdict
[Approve / Request Changes / Needs Discussion]
If Connectors Available
If ~~source control is connected:
- Pull the PR diff automatically from the URL
- Check CI status and test results
If ~~project tracker is connected:
- Link findings to related tickets
- Verify the PR addresses the stated requirements
If ~~knowledge base is connected:
- Check changes against team coding standards and style guides
Tips
- Provide context — "This is a hot path" or "This handles PII" helps me focus.
- Specify concerns — "Focus on security" narrows the review.
- Include tests — I'll check test coverage and quality too.
Related Skills
anthropics/ticket-deflector
testing
VerifiedTrustedOfficial
Reads a forwarded customer email or ticket, pulls order/refund status from PayPal and account history from HubSpot, drafts a tone-matched reply in the owner's writing voice, and can issue a PayPal refund with explicit owner approval. Use when the user says "draft a response," "answer this customer," "where's my order," or "I want a refund."
17,359SKILL.mdUpdated May 28, 2026
anthropics/tax-season-organizer
development
VerifiedTrustedOfficial
Prepares tax-season materials for small business owners — framed as deliverables for their accountant, not tax advice. Two modes: (1) quarterly estimated tax calculation — pulls YTD net income from QuickBooks and calculates the federal income tax + self-employment tax liability and quarterly payment due; (2) year-end 1099 prep — scans QuickBooks, PayPal, and Stripe for contractors paid over $600, builds a 1099-NEC candidate list with missing W-9 flags, and produces a plain-English summary a CPA can work from directly. Trigger this skill whenever the user mentions: quarterly taxes, estimated tax payment, how much to set aside for taxes, 1099s, 1099-NEC, year-end tax prep, contractor payments, W-9s, or any phrase suggesting they are preparing for a tax deadline or handing materials to an accountant. Also trigger proactively when a user asks about net profit or YTD income in a context that suggests they are worried about their tax bill.
17,359SKILL.mdUpdated May 28, 2026
anthropics/tax-prep
tools
VerifiedTrustedOfficial
Prepares tax-season materials — quarterly estimated tax calculation or year-end 1099 prep — and produces an accountant handoff packet. Accepts optional mode and year arguments.
17,359SKILL.mdUpdated May 28, 2026
anthropics/smb-router
tools
VerifiedTrustedOfficial
The front door to the Small Business plugin. Listens to what the owner needs right now — vague or specific — and routes them to the best skill or slash command for the moment. Also serves as a guide: explains what's available, suggests what to try next, and adapts recommendations based on stored business context. Trigger whenever the owner asks "what can you do," "help me with my business," "what should I focus on," "I don't know where to start," or any open-ended business request that doesn't clearly match a single skill.
17,359SKILL.mdUpdated May 28, 2026