Using the Skill Librarian

Overview

The skill-librarian MCP server searches your full skill collection and recommends the best fits for a stated intent. The librarian is the access path: only a small curated set of skills stays installed per agent; everything else is one librarian_find call away. Never copy skill files into agent config directories — read recommendations in place.

This is the one skill worth installing everywhere. It replaces the rest.

Quick Reference

Tool	When to call
librarian_find(intent, k)	Before any non-trivial task. Plain-language intent ("package a python mcp server for distribution"), not keywords.
librarian_brainstorm	Open-ended ideation — "what could I build/do here" — instead of find.
librarian_report(skill, worked, note)	Always after acting on a recommendation — used or rejected, one line why. Success rates drive curation; this is not optional bookkeeping.
librarian_reindex	After adding or editing skills in the collection.
librarian_stats	Collection health and usage stats.

Workflow

1. librarian_find with your intent. Do this even if locally-installed skills look sufficient — the librarian searches the whole collection; your installed list is a tiny fraction of it.
2. Weigh each recommendation's fit, why, and why_not. Rejecting all of them is a valid outcome.
3. Load the chosen skill from the collection — recommendations return names, not paths, and skills may be nested inside bundles: find <your-skills-dir> -maxdepth 4 -type d -name "<skill-name>" → read its SKILL.md.
4. Follow the skill.
5. librarian_report with worked=true/false and a one-line note (why it worked, why it failed, or why you rejected it).

If the MCP isn't connected

The server is a local stdio Python process. Command and env (translate to your agent's config format):

{
  "command": "/path/to/the_librarian/.venv/bin/python",
  "args": ["/path/to/the_librarian/server.py"],
  "env": {
    "LIBRARIAN_SKILLS_DIR": "/path/to/your/skills-collection",
    "OLLAMA_HOST": "http://localhost:11434",
    "LIBRARIAN_EMBED_MODEL": "nomic-embed-text",
    "LIBRARIAN_RERANK_BIN": "/path/to/the_librarian/bin/afm-rerank"
  }
}

LIBRARIAN_RERANK_BIN is optional (macOS + Apple Intelligence only); omit it to use pure embedding order. See the repo README for full setup.

Common Mistakes

• Skipping find because an installed skill looks close enough — the collection version may be better; check first.
• Keyword-style intents ("mcp python") — write what you're trying to accomplish; the embedding search works on intent.
• Forgetting librarian_report — unreported uses starve the curation loop.
• Copying a recommended skill into an agent's skills dir — read it in place; if it earns permanent installation, the human decides.