library-mcp is an MCP server for interacting with

Markdown knowledge bases. Basically, folders that may or may not have subfolders, that include

files with `.md` extension and start with metadata like:

title: My blog post

tags:

url: /my-blog-post

# My blog post

Yesterday I was dreaming about...

The typical workflow in the current verison is to

retrieve recent content for a given tag, and then

discuss using that tag:

Get the next 50 posts with tag "executive",

then tell me what I should do about this problem

I am running into: ...

You can also do the same but by date ranges:

Summarize the blog posts I wrote in the past year.

You might reasonably ask "why not just upload your entire blog

into the context window?" and there are two places where this library

outperforms that approach:

1. My blog corpus is much larger than most model's context windows today.

Further, even if the context windows became exhaustively large, I wrote a lot

of mediocre stuff in the past, so maybe omitting it's a feature.

2. I have a number of distinct Markdown knowledge bases, and this lets me

operate across them in tandem.

Finally, this is a hobby project, intended for running locally on your

laptop. No humans have been harmed using this software, but it does

work pretty well!

Tools

This MCP server exposes these tools.

Content Search Tools

Tools for retrieving content into your context window:

• `get_by_tag` - Retrieves content by tag
• `get_by_text` - Searches content for specific text
• `get_by_slug_or_url` - Finds posts by slug or URL
• `get_by_date_range` - Gets posts published within a date range

Tag Management Tools

Tools for navigating your knowledge base:

• `search_tags` - Searches for tags matching a query
• `list_all_tags` - Lists all tags sorted by post count and recency

Maintenance Tools

Tools for dealing with running the tool:

• `rebuild` - Rebuilds the content index,

useful if you have added more content,

edited existing content, etc

Setup / Installation

These instructions describe installation for Claude Desktop on OS X.

It should work similarly on other platforms.

1. Install Claude Desktop.

2. Clone library-mcp into

a convenient location, I'm assuming `/Users/will/library-mcp`

3. Make sure you have `uv` installed, you can follow these instructions

4. Go to Cladue Desktop, Setting, Developer, and have it create your MCP config file.

Then you want to update your `claude_desktop_config.json`.

(Note that you should replace `will` with your user, e.g. the output of `whoami`.

cd /Users/will/Library/Application Support/Claude

vi claude_desktop_config.json

Then add this section:

{

"mcpServers": {

"library": {

"command": "uv",

"args": [

"--directory",

"/Users/will/library-mcp",

"run",

"main.py",

"/Users/will/irrational_hugo/content"

]

}

}

}

5. Close Claude and reopen it.

6. It should work...