agents-md-generator

MCP server that analyzes codebases with tree-sitter and generates AGENTS.md files.

Python · C# · TypeScript · JavaScript · Go

Installation · Usage · Configuration · How It Works · Contributing

Compatible with any MCP-capable client: Claude Code, Gemini CLI, Cursor, Windsurf, Codex CLI, and others.

The server exposes three tools with a clear separation of concerns:

• generate_agents_md — main entry point. Runs the analysis pipeline internally, embeds writing rules into the payload, and returns chunked read instructions to your client.

• scan_codebase — standalone context tool for when you want deep codebase understanding without generating any file.

• read_payload_chunk — streams the payload back in chunks regardless of which tool produced it.

No large data travels over the MCP wire.

Table of Contents

• Installation

  • Option A — pip install + setup wizard

  • Option B — uvx

• Usage

  • Tools

  • Tool Parameters

• What Gets Generated

• How Incremental Scanning Works

  • How Large Payloads Are Streamed

  • Cache and Payload Location

• Project Configuration

  • Options

  • Environment Variables

  • Project Size Profiles

• What the Analysis Detects

• Credits

Related MCP server: repomap-mcp

Installation

Requirements: Python 3.11+, Git, and any MCP-compatible client.

See INSTALLATION.md for the full guide including prerequisites and troubleshooting.

Option A — pip install + setup wizard (recommended)

pip install agents-md-generator
agents-md-generator setup

The setup wizard detects your installed clients, asks whether to configure globally or per-project, and patches the config files automatically. Supports Claude Code, Gemini CLI, Cursor, Windsurf, and Codex CLI.

Option B — uvx (no install needed)

If you have uv installed, uvx runs the package without a prior install step. Add the entry manually to your client's MCP config:

{
  "mcpServers": {
    "agents-md": {
      "command": "uvx",
      "args": ["agents-md-generator"]
    }
  }
}

For Claude Code specifically:

claude mcp add agents-md -- uvx agents-md-generator

claude mcp add defaults to --scope local (current project only). Add -s user to register it for all projects.

Usage

Once registered, ask your AI client:

"Generate the AGENTS.md for this project"

The client will call generate_agents_md automatically. To scan a different directory:

"Generate the AGENTS.md for the project at /path/to/project"

Tools

Tool Parameters

What Gets Generated

The generated AGENTS.md follows the agents.md open standard. It is written as a README for AI agents, not as documentation for humans. Sections include:

Sections with no detected data are omitted entirely.

How Incremental Scanning Works

1. First run (cold start) — all git-tracked source files are parsed with tree-sitter and cached

2. Subsequent runs — only files whose SHA-256 hash changed since the last scan are re-parsed

3. Semantic diff — for modified files, only changed public symbols are included in the payload

4. No source changes? — the tool stops and asks whether you want to improve the existing AGENTS.md content anyway

5. Private symbols and test file internals are excluded from both cache and payload — only the public API surface matters for AGENTS.md

How Large Payloads Are Streamed

For large codebases the analysis payload can be too big to return inline over the MCP wire. The server handles this transparently through read_payload_chunk.

1. generate_agents_md runs the pipeline internally, writes the payload to disk (including AGENTS.md writing rules), and returns total_chunks with read instructions

2. The client calls read_payload_chunk(project_path, chunk_index=0), then increments chunk_index until has_more is false

3. The client concatenates all data fields — the payload contains the rules and analysis data needed to write AGENTS.md

4. The payload file is automatically deleted after the last chunk is read

1. scan_codebase runs the analysis and writes a pure data payload to disk

2. Same chunked read via read_payload_chunk

3. The client uses the payload for any purpose — code review, planning, Q&A

This flow is pure MCP — no filesystem access required from the client side. Any MCP-compatible client can follow it.

Cache and Payload Location

All runtime artifacts are stored outside your project, in the user cache directory:

~/.cache/agents-md-generator/<project-hash>/cache.json  ← incremental scan cache

The <project-hash> is a SHA-256 of the project's absolute path — unique per project. Nothing is written to your repository.

Note: The server also writes a temporary payload.json to this directory during analysis, but it is managed entirely by the read_payload_chunk tool and deleted automatically after the last chunk is read. You never need to access it directly.

Project Configuration

Create .agents-config.json at your project root to customize behavior. This file is optional — all fields have defaults, and you can commit it to share settings with your team.

{
  "project_size": "medium",
  "exclude": [
    "**/node_modules/**",
    "**/bin/**",
    "**/obj/**",
    "**/.git/**",
    "**/dist/**",
    "**/build/**",
    "**/__pycache__/**",
    "**/*.min.js",
    "**/*.min.css",
    "**/*.bundle.js",
    "**/vendor/**",
    "**/packages/**",
    "**/.venv/**",
    "**/venv/**",
    "**/bower_components/**",
    "**/app/lib/**",
    "**/wwwroot/lib/**",
    "**/wwwroot/libs/**",
    "**/static/vendor/**",
    "**/public/vendor/**",
    "**/assets/vendor/**",
    "**/site-packages/**"
  ],
  "include": [],
  "languages": "auto",
  "agents_md_path": "./AGENTS.md",
  "max_file_size_bytes": 1048576
}

Options

Environment Variables

Project Size Profiles

The project_size setting controls how aggressively the payload is compressed. A single knob tunes all internal caps — methods per class, symbols per file, directory aggregation, route caps, tree depth, and impact filtering.

What the Analysis Detects

Environment Variables

The server scans all source files for environment variable references using language-specific patterns:

It also parses .env.example, .env.template, and .env.sample files at the project root.

Entry Points

Files named index, main, app, server, program, bootstrap, or startup (with any supported extension) are detected as entry points and annotated with their inferred role (e.g., "HTTP server bootstrap", "Electron main process").

Public API Surface

Tree-sitter parses each source file and extracts public symbols — classes, functions, methods, interfaces — filtering out private/protected members and underscore-prefixed symbols. For classes and structs, constructors (when they have parameters) and public properties are also included, revealing dependency injection patterns and data shapes. Interface methods are always included as they define the public contract. These are used to detect naming conventions, DI patterns, and export contracts across layers.

Architectural Distillation

For large codebases, the tool applies several heuristics to ensure the payload remains high-signal:

• Boilerplate Suppression — common directories like Migrations, bin, obj, and Properties are automatically flagged and collapsed in the project structure, preventing them from bloating the directory listing.

• Low-Entropy Summarization — files that primarily contain data structures (DTOs, Entities) with no logic methods are "minified". Instead of listing every property, the tool provides a high-level summary (e.g., "Contains 25 DTO classes").

• Semantic Clustering — the aggregator groups these minified summaries at the directory level, allowing the consuming AI to understand entire data layers through a single line of signal.

• Instruction Embedding — when called via generate_agents_md, writing rules are embedded directly in the payload so the AI agent reads the "Rules of Engagement" before processing the code architecture. Direct scan_codebase calls return pure data with no mandate.

Credits

AGENTS.md format based on the open agents.md standard.

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Licensed under the MIT License