What problem does it solve? Codebases accumulate unnecessary complexity: hand-rolled utilities duplicating the standard library, speculative abstractions with a single implementation, and dependencies that replicate native platform features. This Skill reviews diffs exclusively for over-engineering and tells you exactly what to delete. ## Core Features & Use Cases - Complexity-Only Review: Flags dead code, reinvented stdlib functions, unneeded dependencies, and speculative abstractions, while explicitly excluding correctness, security, and performance concerns. - One-Line Findings: Each finding uses a 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 can be removed. - Use Case: After opening a pull request, ask for an over-engineering review to discover that a 27-line validator class can be replaced by a one-line check, or that moment.js can be swapped for Intl.DateTimeFormat with zero dependencies. ## Quick Start Ask the AI to review this diff for over-engineering and tell me what can be deleted.
