What problem does it solve? Codebases accumulate unnecessary complexity: hand-rolled utilities that duplicate the standard library, speculative abstractions with a single implementation, and dependencies that add nothing. This Skill reviews diffs exclusively for over-engineering and tells you exactly what to cut, keeping reviews focused and actionable. ## Core Features & Use Cases - Complexity-Only Review: Hunts dead code, reinvented stdlib functionality, unneeded dependencies, and speculative abstractions while explicitly excluding correctness, security, and performance concerns. - One-Line Findings: Each finding uses a compact tagged format (delete, stdlib, native, yagni, shrink) with location, what to cut, and what replaces it. - Net-Line Scoring: Ends every review with a single metric estimating how many lines the diff could lose. - Use Case: Before merging a pull request that adds a custom retry wrapper, an abstract repository with one implementation, and a moment.js import, run this review to get findings like "L4: native: moment.js imported for one format call. Intl.DateTimeFormat, 0 deps." ## Quick Start Ask the AI to review this diff for over-engineering and tell me what can be deleted.
