What problem does it solve? Codebases accumulate unnecessary complexity: reinvented standard library functions, unused dependencies, speculative abstractions, and dead flexibility. This Skill reviews diffs exclusively for over-engineering and tells you exactly what to cut, keeping code lean. ## Core Features & Use Cases - Complexity-Only Review: Hunts over-engineering while explicitly excluding correctness, security, and performance concerns, which belong to a normal review pass. - Tagged One-Line Findings: Each finding uses a tag (delete, stdlib, native, yagni, shrink) with the location, what to cut, and what replaces it. - Net-Line Scoring: Ends every review with a single metric, net: -<N> lines possible, or reports Lean already. Ship. when nothing can be cut. - Use Case: Before merging a pull request that adds a custom retry wrapper and a new date-formatting dependency, run this review to learn that the retry wrapper is deletable and Intl.DateTimeFormat replaces the dependency. ## Quick Start Ask the AI to review this diff for over-engineering and tell me what can be deleted.
