prompt-library

Prompt Library

An MCP server that serves markdown files as @ mention resources in Claude Code.

Type @prompts:my-project://tdd in Claude Code and the full prompt content expands into your conversation — just like @file, but for reusable prompts.

Install

Homebrew (macOS/Linux)

brew install ohare93/tap/prompt-library

Scoop (Windows)

scoop bucket add ohare93 https://github.com/ohare93/scoop
scoop install prompt-library

GitHub Releases

Download the latest binary from releases.

Usage

As a standalone MCP server

Add it to your Claude Code MCP settings (.claude/settings.json or project-level .claude/settings.local.json):

{
  "mcpServers": {
    "prompts": {
      "command": "prompt-library",
      "args": [],
      "env": {
        "PROMPT_DIRS": "/home/me/shared-prompts,/home/me/work-prompts"
      }
    }
  }
}

Or with absolute path if not in PATH:

{
  "mcpServers": {
    "prompts": {
      "command": "/usr/local/bin/prompt-library",
      "args": [],
      "env": {
        "PROMPT_DIRS": "/home/me/shared-prompts"
      }
    }
  }
}

As a Claude Code plugin

claude plugin install prompt-library@<marketplace>

The plugin asks for prompt_dirs at install time and automatically downloads the binary on first run.

How it works

The server scans for .md files in two ways:

1. Shared libraries — directories you set in PROMPT_DIRS (comma-separated)
2. Per-project — any prompts/ folder in your current working directory is picked up automatically

The project name (used in the URI) comes from the nearest .git parent:

my-project/           <- .git here, so project = "my-project"
  prompts/
    tdd.md            -> @prompts:my-project://tdd
    code-review.md    -> @prompts:my-project://code-review

Multiple directories work — each gets its own namespace:

PROMPT_DIRS=/home/me/shared-prompts,/home/me/work-prompts

@prompts:shared-prompts://caveman
@prompts:work-prompts://deploy-checklist

Prompt file format

Each .md file is a self-contained prompt. The first # Heading becomes the title, the first content line becomes the description in autocomplete.

# Test-Driven Development

Follow red-green-refactor strictly. No implementation code without a failing test first.

## Workflow

1. **Red**: Write a failing test...

Building from source

Requires Go 1.22+.

go build -o prompt-library ./cmd/prompt-library
./prompt-library --version