# Moo

> moo — Moo virtual machine CLI

- Skill: `simhacker/moo` (Agent Skill, multi-file: 41 files)
- Install (CLI): `npx skillmds@latest add simhacker/moo`
- Raw SKILL.md: https://api.skillmd.com/api/skills/simhacker/moo/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: SimHacker (https://skillmd.com/u/simhacker)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/simhacker/moo

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# moo — Moo virtual machine CLI

The moo skill is the implementation of the moo CLI. Moocroworld is the skill that defines the model (branches as actors, moorls, crows); moo is the engine that runs the commands.

- **REPOS.yml**: Resolved from moocroworld (skills/moocroworld/REPOS.yml or MOO_REPOS_FILE). Moo does not ship its own REPOS.yml.
- **Ephemeral cache**: `.moollm/skills/moo/cache/` — file cache (per repo/branch/path), persisted to disk, loaded on first use, saved at exit. Clear that directory to reset cache.
- **Entry point**: `skills/moo/moo.py`. The moocroworld skill provides a thin wrapper so `python skills/moocroworld/moo.py` (or the installed `moo` command) delegates to the moo skill.

**Full reference**: [MOONUAL.md](MOONUAL.md) (Moo Manual) — commands, moorl syntax, overlay format, environment, library API.

Part of MOOLLM. See repo README and skills/README.