fallow

SKILL.md

Fallow: codebase intelligence for TypeScript and JavaScript

Codebase intelligence for TypeScript and JavaScript. The static layer analyzes code and styles and reports quality, changed-code risk, cleanup opportunities, circular dependencies, code duplication, complexity hotspots, architecture boundary violations, design-system styling drift, feature flag patterns, and opt-in security candidates. Runtime coverage merges production execution data into the same fallow health report for hot-path review, cold-path deletion confidence, and stale-flag evidence, with a single local capture available by default and continuous/cloud runtime monitoring available as an optional mode. 123 framework plugins, zero configuration, sub-second static analysis.

When to Use

Find cleanup opportunities: unused files, exports, types, members, dependencies, or stale flags.

Detect code duplication, circular dependencies, architecture boundary issues, and complexity hotspots.

Check styling consistency, CSS dead surface, and design-token drift.

Audit changed code before a commit, PR, release, or refactor.

Set up CI quality gates, duplication thresholds, and regression baselines.

Auto-fix supported unused exports and dependencies after --dry-run.

Investigate why a specific export, dependency, file, or issue type was reported.

Surface local security candidates for an agent to verify (fallow security).

Find untested but runtime-reachable code (fallow health --coverage-gaps).

Rank complexity hotspots, owners, and refactoring targets (fallow health --hotspots --ownership --targets).

Review what fallow has surfaced over time (fallow impact).