fallowlisted
Install: claude install-skill opencue/cue
# Fallow: codebase intelligence for JavaScript and TypeScript
Codebase intelligence for JavaScript and TypeScript. The free static layer reports quality, changed-code risk, cleanup opportunities, 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. 97 framework plugins, zero configuration, sub-second static analysis.
## When to Use
- Finding cleanup opportunities (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 quality gates 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
- Runtime error analysis or debugging
- Type checking (use `tsc` for that)
- Linting style or formatting issues (use ESLint, Biome, Prettier)
- Security vulnerability scanning
- Bundle size analysis
- Projects that are not JavaScript or TypeScript
## Prerequisites
Fallo