# Markdown Library

> Use this tool when you need to interact with large Markdown knowledge bases and retrieve content efficiently. It solves problems of information overload and disorganization by indexing folders of Markdown files and providing navigation tools for exploring tags and content relationships. The Markdown Library takes in folders of Markdown files with YAML frontmatter and outputs searchable content that can be retrieved by tags, text search, slugs/URLs, or date ranges.

Canonical page: https://skillsregistry.net/skills/lethain-markdown-library  
JSON: https://api.skillsregistry.net/v1/skills/lethain-markdown-library

## Description

Library-MCP is a server implementation that enables AI assistants to interact with Markdown knowledge bases through a set of specialized tools. Created by Will Larson (lethain), it indexes folders of Markdown files with YAML frontmatter, allowing users to retrieve content by tags, text search, slugs/URLs, or date ranges. The server exposes navigation tools for exploring tags and content relationships, making it particularly valuable for users with large document collections that exceed context windows or span multiple knowledge bases. Designed as a hobby project for local use, it works well with Claude Desktop and similar MCP-compatible assistants.

## Trust

- **Trust score (0–1):** 0.95
- **Verification tier:** verified
- **Last scanned:** 2026-09-19

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** search
- **Updated:** 2026-09-19

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/lethain-markdown-library)
- **Repository:** <https://github.com/lethain/library-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "lethain-markdown-library"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/lethain-markdown-library` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/lethain-markdown-library/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt