Use when the user wants a focused code-quality / maintainability review — 'review code quality', 'assess maintainability', 'find code smells', 'check SOLID/DRY adherence', 'is this codebase clean?', 'where's the dead code / duplication / bad error handling', 'refactoring opportunities', 'do we have enough tests?'. Produces a single evidence-backed report (code-quality-review.md) covering maintainability, consistency, smells, error handling, and test coverage. For a full multi-dimension audit use zeroday-auditor instead. Analysis only; never modifies source.
