Fallow: Codebase Analyzer

The codebase analyzer for JavaScript and TypeScript. Finds unused code, circular dependencies, code duplication, complexity hotspots, architecture boundary violations, and feature flag patterns. 90 framework plugins, zero configuration, sub-second performance.

When to Use

• Finding dead code (unused files, exports, types, enum/class members)
• Finding unused or unlisted dependencies
• Detecting code duplication and clones
• Checking code health and complexity hotspots
• Cleaning up a codebase before a release or refactor
• Auditing a project for structural issues
• Setting up CI checks for dead code or duplication thresholds
• Auto-fixing unused exports and dependencies
• Detecting feature flag patterns (environment gates, SDK calls, config objects)
• Investigating why a specific export or file appears unused

When NOT to Use