io.github.cyanheads/git-mcp-server MCP Server

<div align="center"> <h1>@cyanheads/git-mcp-server</h1> <p><b>A Git MCP server for AI agents. STDIO & Streamable HTTP.</b> <div>28 Tools · 1 Resource · 1 Prompt</div> </p> </div> <div align="center">

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Tools

28 git operations organized into seven categories:

Category	Tools	Description
Repository Management	git_init, git_clone, git_status, git_clean	Initialize repos, clone from remotes, check status, clean untracked files
Staging & Commits	git_add, git_commit, git_diff	Stage changes, create commits, compare changes
History & Inspection	git_log, git_show, git_blame, git_reflog	View commit history, inspect objects, trace authorship, view ref logs
Analysis	git_changelog_analyze	Gather git context and instructions for LLM-driven changelog analysis
Branching & Merging	git_branch, git_checkout, git_merge, git_rebase, git_cherry_pick	Manage branches, switch contexts, integrate changes, apply specific commits
Remote Operations	git_remote, git_fetch, git_pull, git_push	Configure remotes, fetch updates, synchronize repositories, publish changes
Advanced Workflows	git_tag, git_stash, git_reset, git_worktree, git_set_working_dir, git_clear_working_dir, git_wrapup_instructions	Tag releases (list/create/delete/verify), stash changes, reset state, manage worktrees, set/clear session directory

Resources

Resource	URI	Description
Git Working Directory	git://working-directory	The current session working directory, set via git_set_working_dir.

Prompts

Prompt	Description	Parameters
Git Wrap-up	Workflow protocol for completing git sessions: review, document, commit, and tag changes.	changelogPath, createTag.

Getting started

Runtime

Works with both Bun and Node.js. Runtime is auto-detected.

Runtime	Command	Minimum Version
Node.js	npx @cyanheads/git-mcp-server@latest	>= 20.0.0
Bun	bunx @cyanheads/git-mcp-server@latest	>= 1.2.0

MCP client configuration

Add the following to your MCP client config (e.g., cline_mcp_settings.json). Update the environment variables to match your setup — especially the git identity fields.

{
  "mcpServers": {
    "git-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": ["@cyanheads/git-mcp-server@latest"],
      "env": {
        "MCP_TRANSPORT_TYPE": "stdio",
        "MCP_LOG_LEVEL": "info",
        "GIT_BASE_DIR": "~/Developer/",
        "LOGS_DIR": "~/Developer/logs/git-mcp-server/",
        "GIT_USERNAME": "cyanheads",
        "GIT_EMAIL": "casey@caseyjhand.com",
        "GIT_SIGN_COMMITS": "true"
      }
    }
  }
}

Bun users: replace "command": "npx" with "command": "bunx".

For Streamable HTTP, set MCP_TRANSPORT_TYPE=http and MCP_HTTP_PORT=3015.

Features

Built on mcp-ts-template.

Feature	Details
Declarative tools	Define capabilities in single, self-contained files. The framework handles registration, validation, and execution.
Error handling	Unified McpError system for consistent, structured error responses.
Authentication	Supports none, jwt, and oauth modes.
Pluggable storage	Swap backends (in-memory, filesystem, Supabase, Cloudflare KV/R2) without changing business logic.
Observability	Structured logging (Pino) and optional auto-instrumented OpenTelemetry for traces and metrics.
Dependency injection	Built with tsyringe for decoupled, testable architecture.
Cross-runtime	Auto-detects Bun or Node.js and uses the appropriate process spawning method.
Provider architecture	Pluggable git provider system. Current: CLI. Planned: isomorphic-git for edge deployment.
Working directory management	Session-specific directory context for multi-repo workflows.
Configurable git identity	Override author/committer info via environment variables, with fallback to global git config.
Commit signing	GPG/SSH signing (enabled by default) for commits, merges, rebases, cherry-picks, and tags. Silent fallback to unsigned on failure with signed/signingWarning fields in responses.
Safety	Destructive operations (git clean, git reset --hard) require explicit confirmation flags.

Security

• All file paths are validated and sanitized to prevent directory traversal.
• Optional GIT_BASE_DIR restricts operations to a specific directory tree for multi-tenant sandboxing.
• Git commands use validated arguments via process spawning — no shell interpolation.
• JWT and OAuth support for authenticated deployments.
• Optional rate limiting via the DI-managed RateLimiter service.
• All operations are logged with request context for auditing.

Configuration

All configuration is validated at startup in src/config/index.ts. Key environment variables:

Variable	Description	Default
MCP_TRANSPORT_TYPE	Transport: stdio or http.	stdio
MCP_SESSION_MODE	HTTP session mode: stateless, stateful, or auto.	auto
MCP_RESPONSE_FORMAT	Response format: json (LLM-optimized), markdown (human-readable), or auto.	json
MCP_RESPONSE_VERBOSITY	Detail level: minimal, standard, or full.	standard
MCP_HTTP_PORT	HTTP server port.	3015
MCP_HTTP_HOST	HTTP server hostname.	127.0.0.1
MCP_HTTP_ENDPOINT_PATH	MCP request endpoint path.	/mcp
MCP_AUTH_MODE	Authentication mode: none, jwt, or oauth.	none
STORAGE_PROVIDER_TYPE	Storage backend: in-memory, filesystem, supabase, cloudflare-kv, r2.	in-memory
OTEL_ENABLED	Enable OpenTelemetry.	false
MCP_LOG_LEVEL	Minimum log level: debug, info, warn, error.	info
GIT_SIGN_COMMITS	GPG/SSH signing for commits, merges, rebases, cherry-picks, and tags. Falls back to unsigned on failure (see response signed/signingWarning).	true
GIT_AUTHOR_NAME	Git author name. Aliases: GIT_USERNAME, GIT_USER. Falls back to global git config.	(none)
GIT_AUTHOR_EMAIL	Git author email. Aliases: GIT_EMAIL, GIT_USER_EMAIL. Falls back to global git config.	(none)
GIT_BASE_DIR	Absolute path to restrict all git operations to a specific directory tree.	(none)
GIT_WRAPUP_INSTRUCTIONS_PATH	Path to custom markdown file with workflow instructions.	(none)
MCP_AUTH_SECRET_KEY	Required for jwt auth. 32+ character secret key.	(none)
OAUTH_ISSUER_URL	Required for oauth auth. OIDC provider URL.	(none)

Running the server

Via package manager (no install)

npx @cyanheads/git-mcp-server@latest

Configure through environment variables or your MCP client config.

Local development

# Build and run
npm run rebuild
npm run start:stdio   # or start:http

# Dev mode with hot reload
npm run dev:stdio     # or dev:http

# Checks and tests
npm run devcheck      # lint, format, typecheck
npm test

Cloudflare Workers

npm run build:worker   # Build the worker bundle
npm run deploy:dev     # Run locally with Wrangler
npm run deploy:prod    # Deploy to Cloudflare

Project structure

Directory	Purpose
src/mcp-server/tools	Tool definitions (*.tool.ts). Git capabilities live here.
src/mcp-server/resources	Resource definitions (*.resource.ts). Git context data sources.
src/mcp-server/transports	HTTP and STDIO transport implementations, including auth.
src/storage	StorageService abstraction and provider implementations.
src/services	Git service provider (CLI-based git operations).
src/container	DI container registrations and tokens.
src/utils	Logging, error handling, performance, security utilities.
src/config	Environment variable parsing and validation (Zod).
tests/	Unit and integration tests, mirroring src/ structure.

Response format

Configure output format and verbosity via MCP_RESPONSE_FORMAT and MCP_RESPONSE_VERBOSITY.

JSON format (default, optimized for LLM consumption):

{
  "success": true,
  "branch": "main",
  "staged": ["src/index.ts", "README.md"],
  "unstaged": ["package.json"],
  "untracked": []
}

Markdown format (human-readable):

# Git Status: main

## Staged (2)
- src/index.ts
- README.md

## Unstaged (1)
- package.json

The LLM always receives the complete structured data via responseFormatter — full file lists, metadata, timestamps — regardless of what the client displays. Verbosity controls how much detail is included: minimal (core fields only), standard (balanced), or full (everything).

Development guide

See AGENTS.md for architecture, tool development patterns, and contribution rules.

Testing

Tests use Bun's test runner with Vitest compatibility.

bun test              # Run all tests
bun test --coverage   # With coverage
bun run devcheck      # Lint, format, typecheck, audit

Roadmap

The server uses a provider-based architecture for git operations:

• CLI provider (current) — Full 28-tool coverage via native git CLI. Requires local git installation.
• Isomorphic git provider (planned) — Pure JS implementation for edge deployment (Cloudflare Workers, Vercel Edge, Deno Deploy). Uses isomorphic-git.
• GitHub API provider (maybe) — Cloud-native operations via GitHub REST/GraphQL APIs, no local repo required.

Contributing

Issues and pull requests are welcome. Run checks before submitting:

npm run devcheck
npm test

License

Apache 2.0. See LICENSE.

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