What problem does it solve? Codebases accumulate unnecessary complexity: reinvented standard library functions, speculative abstractions, unused dependencies, and dead flexibility. This Skill reviews diffs exclusively for over-engineering and tells you exactly what to cut, one line per finding. ## Core Features & Use Cases - Complexity-Only Review: Hunts dead code, hand-rolled stdlib replacements, unneeded dependencies, and speculative abstractions while explicitly ignoring correctness, security, and performance issues. - 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 showing how many lines could be removed, or confirms the diff is already lean. - Use Case: After a large feature branch is ready, run this review to discover that a 27-line validator class can be replaced by a one-line check, or that moment.js was imported for a single format call that Intl.DateTimeFormat handles natively. ## Quick Start Ask the AI to review this diff for over-engineering and tell me what can be deleted or simplified.
