code-check-duplication

What problem does it solve?

It finds duplicated TypeScript/TSX patterns where the runtime contract can silently drift from the type-level definition, especially around enum-like unions and status/variant handling.

Core Features & Use Cases

• Parallel-array drift detection (HIGH): flags hand-maintained arrays typed from string-literal unions when their contents mirror or mismatch the union literals.
• Repeated filter and per-variant branching detection (MEDIUM): surfaces smell-class repetition such as multiple .filter chains or if/else if UI branches keyed on the same literal field.
• Scattered literal usage detection (LOW–MEDIUM): identifies widely repeated literals that increase the chance of forgetting a new enum value.
• Safety-first reporting: produces a ranked Markdown report without refactoring or code changes.

Quick Start

Ask the AI to run code-check-duplication on your recently edited TypeScript files to get a prioritized duplication/drift report without auto-fixing.