Fallow: codebase intelligence for JavaScript and TypeScript

Codebase intelligence for JavaScript and TypeScript. The free static layer finds unused code, circular dependencies, code duplication, complexity hotspots, architecture boundary violations, and feature flag patterns. Runtime coverage merges production execution data into the same fallow health report for hot-path review, cold-path deletion confidence, and stale-flag evidence: a single local capture is free, while continuous/cloud runtime monitoring is paid. 95 framework plugins, zero configuration, sub-second static analysis.

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