Using AI Agents as Code Reviewers with Custom Review Checklists
Code review is one of the highest-leverage uses of AI coding agents. But the default "review this code" prompt produces generic feedback. Custom review checklists make AI reviews actually useful.
Custom Slash Commands for Reviews
Claude Code supports custom slash commands that you can define in your project. Create a /review command that includes your team's specific review criteria. Instead of generic suggestions, the agent checks for the things your team actually cares about.
Your checklist might include error handling patterns, naming conventions, test coverage requirements, performance considerations, and security patterns specific to your codebase.
What AI Reviews Catch That Humans Miss
AI reviewers excel at consistency checks. They will catch every instance where you forgot to handle an error, every place where a variable name does not follow your convention, and every function that exceeds your complexity threshold. They do not get tired or rushed.
They also catch subtle issues like unused imports, redundant null checks, and inconsistent return types that humans skim past after reviewing a dozen files.
What AI Reviews Miss That Humans Catch
AI reviewers struggle with architectural context. They cannot tell you that a change will conflict with another team's plans, that a feature was intentionally designed a certain way for a reason not in the code, or that the approach will not scale for next quarter's requirements.
They also miss social context - whether a junior developer needs encouragement or whether a PR is a good opportunity for teaching.
The Practical Setup
Define your review checklist in a CLAUDE.md or a custom command file. Include examples of good and bad patterns from your actual codebase. Run the review as part of your PR workflow - either manually with a slash command or automatically as a CI step.
The best reviews combine AI consistency checking with human judgment on architecture and intent.
Fazm is an open source macOS AI agent. Open source on GitHub.