code-review

name	code-review
description	On-demand code review checklist. Use when: reviewing code changes, PR review, self-review before committing, checking code quality after implementation. Covers readability, correctness, performance, security, and maintainability.

Code Review Skill

When to Use

• After implementing a feature (self-review)
• Before committing code
• When asked to review a PR or diff
• When a code quality gate is needed before shipping

Review Process

1. Understand the Change

• What problem does this code solve?
• Reference the related task description or issue
• Identify all modified files

2. Correctness

• Does the code do what it claims to do?
• Are edge cases handled? (null, empty, zero, negative, overflow, max length)
• Are error paths tested, not just happy paths?
• Are race conditions possible? (concurrent access, async operations)
• Do function contracts match their callers' expectations?

3. Readability

• Are names descriptive and consistent with codebase conventions?
• Is the code self-documenting, or does it need comments for non-obvious logic?
• Are functions small and single-purpose?
• Is nesting depth reasonable (max 3 levels)?
• Would a new team member understand this without explanation?

4. Performance

• No unnecessary database queries (N+1 problem)
• No unnecessary re-renders or re-computations
• Large data sets handled efficiently (pagination, streaming, lazy loading)
• No blocking operations on the main thread
• Appropriate use of caching where applicable

5. Security (Quick Check)

• No secrets, API keys, or credentials in code
• User input validated and sanitized
• SQL queries parameterized (no string concatenation)
• No dangerouslySetInnerHTML or equivalent without sanitization
• Authentication/authorization checked on every protected route

6. Maintainability

• No dead code or commented-out code
• No duplicate code that should be extracted
• Dependencies are justified (not adding a library for one function)
• Tests cover the new code paths
• Error messages are helpful for debugging

7. Report Format

## Code Review: [Feature/Change]

### Summary
[One sentence: what was reviewed]

### Findings
| # | Severity | File:Line | Issue | Suggestion |
|---|----------|-----------|-------|------------|
| 1 | High     | file.ts:42 | [issue] | [fix] |
| 2 | Medium   | file.ts:88 | [issue] | [fix] |

### Verdict
APPROVE / REQUEST CHANGES / NEEDS DISCUSSION