How do I install the Fallow skill?

Run npx skillmds@latest add javimosch/fallow in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Fallow safe to use?

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Which AI agents work with Fallow?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Fallow free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Fallow?

javimosch (@javimosch) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Fallow by javimosch — Agent Skill

Name: Fallow
Author: javimosch

File contents

Fallow Plugin

Codebase analyzer for TypeScript and JavaScript. Finds unused code, circular dependencies, code duplication, and complexity hotspots. Rust-native, sub-second.

Commands

All Analyses

fallow — Run dead-code, dupes, and health analyses

Dead Code

fallow deadcode scan — Find unused files, exports, dependencies, types

Duplication

fallow dupes scan — Find copy-pasted code blocks

Complexity

fallow health analyze — Analyze complexity hotspots

Audit (PR Quality Gate)

fallow audit check — Quality gate for AI-generated code and PRs

Auto-fix

fallow fix apply — Auto-remove dead exports and deps

Score (Quick Health)

fallow score run — Get health score, hotspots, and refactoring targets in one call

CI Gate

fallow ci gate — CI quality gate with non-zero exit on new issues, SARIF output

Usage Examples

Run all analyses:

fallow

Dead code detection:

fallow dead-code
fallow dead-code --unused-exports
fallow dead-code --circular-deps
fallow dead-code --boundary-violations
fallow dead-code --changed-since main

Duplication scan:

fallow dupes
fallow dupes --mode semantic
fallow dupes --trace src/utils.ts:42

Health/check complexity:

fallow health --score
fallow health --top 20
fallow health --hotspots

Audit PR:

fallow audit
fallow audit --base main
fallow audit --format json

Auto-fix preview:

fallow fix --dry-run

Quick health score:

fallow score run
fallow score run --format badge

CI quality gate:

fallow ci gate
fallow ci gate --base main --format sarif
fallow ci gate --min-score 70

Installation

cargo install fallow-cli

Or via npm:

npm install -g fallow
npx fallow

Key Features

Sub-second analysis (Rust-native)
Zero config needed
90 framework plugins (Next.js, Vite, Jest, etc.)
Dead code: unused files, exports, deps, circular deps
Duplication detection across entire codebase
Complexity analysis with refactoring targets
PR quality gate with pass/warn/fail verdict
Multiple output formats (JSON, SARIF, markdown)
CI/CD integration (GitHub Actions, GitLab CI)

---name: fallowdescription: Use this skill when the user wants to analyze a TypeScript/JavaScript codebase for dead code, duplication, complexity hotspots, or run quality gates for PRs.---# Fallow PluginCodebase analyzer for TypeScript and JavaScript. Finds unused code, circular dependencies, code duplication, and complexity hotspots. Rust-native, sub-second.## Commands### All Analyses- `fallow` — Run dead-code, dupes, and health analyses### Dead Code- `fallow deadcode scan` — Find unused files, exports, dependencies, types### Duplication- `fallow dupes scan` — Find copy-pasted code blocks### Complexity- `fallow health analyze` — Analyze complexity hotspots### Audit (PR Quality Gate)- `fallow audit check` — Quality gate for AI-generated code and PRs### Auto-fix- `fallow fix apply` — Auto-remove dead exports and deps### Score (Quick Health)- `fallow score run` — Get health score, hotspots, and refactoring targets in one call### CI Gate- `fallow ci gate` — CI quality gate with non-zero exit on new issues, SARIF output## Usage ExamplesRun all analyses:```fallow```Dead code detection:```fallow dead-codefallow dead-code --unused-exportsfallow dead-code --circular-depsfallow dead-code --boundary-violationsfallow dead-code --changed-since main```Duplication scan:```fallow dupesfallow dupes --mode semanticfallow dupes --trace src/utils.ts:42```Health/check complexity:```fallow health --scorefallow health --top 20fallow health --hotspots```Audit PR:```fallow auditfallow audit --base mainfallow audit --format json```Auto-fix preview:```fallow fix --dry-run```Quick health score:```fallow score runfallow score run --format badge```CI quality gate:```fallow ci gatefallow ci gate --base main --format sariffallow ci gate --min-score 70```## Installation```bashcargo install fallow-cli```Or via npm:```bashnpm install -g fallownpx fallow```## Key Features- Sub-second analysis (Rust-native)- Zero config needed- 90 framework plugins (Next.js, Vite, Jest, etc.)- Dead code: unused files, exports, deps, circular deps- Duplication detection across entire codebase- Complexity analysis with refactoring targets- PR quality gate with pass/warn/fail verdict- Multiple output formats (JSON, SARIF, markdown)- CI/CD integration (GitHub Actions, GitLab CI)

Frequently asked questions

Fallow