Code Review Prompt

Review this code as a senior engineer would:

```
[PASTE_CODE_FOR_REVIEW]
```

**Context:** [WHAT_THIS_CODE_DOES]
**PR goal:** [WHY_THIS_CHANGE_WAS_MADE]

Review for:
1. **Correctness** — bugs, edge cases, off-by-one errors, race conditions
2. **Security** — injection, XSS, auth bypass, sensitive data exposure
3. **Performance** — unnecessary work, N+1 queries, memory leaks
4. **Readability** — naming, structure, complexity, "WTF per minute" factor
5. **Maintainability** — coupling, testability, future change difficulty

For each issue:
- **Line reference** — which line(s)
- **Severity** — 🔴 Must fix / 🟡 Should fix / 🟢 Nit
- **What's wrong** — clear explanation
- **Suggested fix** — concrete code change

End with:
- Overall assessment (Approve / Request changes)
- 1-2 things done well (positive feedback matters)
- The single most important thing to fix if time is limited