# Opam > opam is the package manager for ocaml packages. This skill teaches you how to use it Use when this capability is needed. - Skill: `tomevault-io/opam` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/opam` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/opam/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/opam --- # My Skill ## When to Use - Use this skill when you need to run any command from our dependencies like `dune`. For example `dune build`, you would wrap it with `opam exec -- dune build` - This skill is helpful for knowing how to use opam properly ## Instructions - Install a package: `opam install {{package}} -y` - Pin a package from a github URL `opam pin add {{package}}.dev "{{URL}}" -y`. For example: `opam pin add toffee.dev "https://github.com/davesnx/mosaic.git#20c70887e8357200e2b794cd9dd12095404cabaf" -y` - Domain-specific conventions - Best practices and patterns --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/davesnx) — claim your Tome and manage your conversions.