How to Use Claude for Code Review
The exact prompt, setup, and codes to get great results.
The Problem
Thorough code reviews take time most teams don't have. Reviewers miss edge cases, security issues, and performance problems because they're scanning too quickly.
The Prompt (Copy & Paste)
Review this code for production readiness. Language: [LANGUAGE] Context: [WHAT THIS CODE DOES] Deployment target: [WEB APP / API / CLI / LIBRARY] ```[language] [PASTE CODE] ``` Review checklist: 1. **Correctness**: Logic errors, edge cases, off-by-one errors 2. **Security**: Injection risks, auth issues, data exposure 3. **Performance**: N+1 queries, unnecessary allocations, missing indexes 4. **Readability**: Naming, structure, comments where needed 5. **Error handling**: Missing try/catch, unhelpful error messages, silent failures 6. **Testing gaps**: What tests should exist for this code? Format: Rate each area (✅ Good / ⚠️ Needs attention / 🔴 Critical) with specific line references.
Replace the [BRACKETED] placeholders with your specific details.
What You Get
A structured review that catches issues human reviewers miss — especially security edge cases and performance problems. Each finding references specific lines with clear severity ratings.
Prompt Codes That Help
Add these prefix codes to the start of your prompt for even better results:
Click any code to see its before/after examples and learn how it works.
Want all 120+ prompt codes?
The Claude Prompt Cheat Sheet has every tested code with before/after examples, combo stacks, and 10 workflow playbooks for different roles.
More Software Development Tasks
Debugging React
React bugs are notoriously hard to debug — infinite re-renders, stale closures, hydration mismatches. Error messages point to the wrong component and stack traces are useless.
Debugging Python
Python's dynamic typing and silent failures make bugs hard to catch. A function returns None instead of a value, a dictionary key is missing, or an import fails at runtime.
Writing Tests
Writing tests is tedious and most developers skip edge cases. Coverage reports show green but the tests don't actually catch real bugs because they only test the happy path.
Refactoring Code
Legacy code works but is unmaintainable. New developers can't understand it, adding features creates bugs, and nobody wants to touch it. But a rewrite is too risky.
Get new prompts + workflows weekly
Join developers and professionals getting tested Claude prompt codes, workflows, and real-world techniques. One email when there’s something worth sharing.