Rusty Commit (rco)

AI-powered commit message generator written in Rust. Generate conventional commits, GitMoji messages, and PR descriptions using 18+ AI providers.

Fast. Local-first options. Secure. Editor integrations via MCP.

Why Rusty Commit

• Speed: Native Rust binary with instant startup
• Choice: Works with 18+ AI providers (OpenAI, Anthropic/Claude, OpenRouter, Groq, DeepSeek, GitHub Copilot, Ollama, Fireworks, Moonshot/Kimi, Alibaba DashScope/Qwen, Mistral, and more)
• Secure: Optional keychain storage via --features secure-storage
• Flexible: Conventional commits, GitMoji, templates, multi-language
• Integrated: Git hooks, GitHub Actions, MCP server for editors
• Multi-account: Switch between multiple providers/accounts seamlessly

Contents

• Installation
• Quick Start
• Generate Commit Messages
• Interactive Mode
• PR Description Generation
• Examples
• Configuration
• Multi-Account Support
• Providers
• Git Hooks
• MCP Server
• Updates
• GitHub Action
• Advanced Options
• File Exclusion
• Troubleshooting
• Uninstall
• Compatibility
• Development
• Security & Verification
• License
• Credits

Installation

One-liner (recommended)

curl -fsSL https://raw.githubusercontent.com/hongkongkiwi/rusty-commit/main/install.sh | bash

Security-conscious users: Verify the install script before running it.

The script auto-detects your platform and installs via Homebrew, .deb/.rpm, Cargo, or binary. All packages are cryptographically signed and verified automatically:

• Cosign/Sigstore signatures (keyless, modern)
• GPG signatures (traditional)
• SHA256 checksums
• GitHub build attestations

Homebrew (macOS/Linux)

brew tap hongkongkiwi/tap
brew install rusty-commit

Cargo

cargo install rusty-commit                      # basic
cargo install rusty-commit --features secure-storage  # store API keys in system keychain

Debian/Ubuntu

wget https://github.com/hongkongkiwi/rusty-commit/releases/latest/download/rusty-commit_amd64.deb
sudo dpkg -i rusty-commit_amd64.deb

Fedora/RHEL

sudo dnf install https://github.com/hongkongkiwi/rusty-commit/releases/latest/download/rusty-commit.x86_64.rpm

Alpine Linux

# Direct .apk install (signed packages)
wget https://github.com/hongkongkiwi/rusty-commit/releases/latest/download/rusty-commit-x86_64.apk
sudo apk add --allow-untrusted rusty-commit-x86_64.apk

# Or via binary (all architectures):
# x86_64
curl -fsSL https://github.com/hongkongkiwi/rusty-commit/releases/latest/download/rustycommit-linux-musl-x86_64.tar.gz | tar xz
sudo mv rco /usr/local/bin/

# aarch64
curl -fsSL https://github.com/hongkongkiwi/rusty-commit/releases/latest/download/rustycommit-linux-musl-aarch64.tar.gz | tar xz
sudo mv rco /usr/local/bin/

# riscv64
curl -fsSL https://github.com/hongkongkiwi/rusty-commit/releases/latest/download/rustycommit-linux-musl-riscv64.tar.gz | tar xz
sudo mv rco /usr/local/bin/

Windows (Scoop)

scoop install rusty-commit

Quick Start

Setup Wizard (Recommended for New Users)

rco setup          # Interactive wizard to configure everything

Single Provider (Traditional)

# 1) Authenticate (Claude OAuth) or set an API key
rco auth login
# or
rco config set RCO_API_KEY=sk-...

# 2) Generate a commit
git add .
rco

Multi-Account (Recommended for Multiple Providers)

# 1) Add your first account (interactive wizard)
rco config add-provider

# 2) Add more accounts for different providers/roles
rco config add-provider  # Add "work-openai", "personal-anthropic", etc.

# 3) List all accounts
rco config list-accounts

# 4) Switch between accounts
rco config use-account work-openai
rco config use-account personal-anthropic

# 5) Generate commits (uses active account automatically)
git add .
rco

Generate Commit Modes

Basic Generation

rco                         # Generate and commit
rco -y                      # Skip confirmation, commit automatically
rco -c "Fix login bug"      # Add extra context

Multiple Variations

Generate up to 5 variations and choose the best one:

rco -g 3                    # Generate 3 variations to choose from
rco -g 5 -y                 # Generate 5, auto-select first (use -y carefully)

GitMoji Format

rco --fgm                   # Use full GitMoji specification
rco -fgm -y                 # GitMoji + auto-commit

Clipboard Mode

Copy generated message to clipboard instead of committing:

rco -C                      # Copy to clipboard
rco -C -y                   # Copy and skip confirmation

Show Prompt (Debug)

rco --show-prompt           # Print the AI prompt and exit (no commit)

Timing Information

rco --timing                # Show detailed timing information

Thinking Tags Stripping

For reasoning models (like DeepSeek R1) that output <thinking> tags:

rco --strip-thinking        # Strip <thinking> tags from response

Interactive Mode

When running rco without -y, you'll enter interactive mode:

1. Review generated message - See the AI-generated commit message
2. Edit before committing - Press key to edit in your $EDITOR
3. Regenerate - Press key to generate a new variation
4. Multiple variations - With -g 3, see all variations and pick one

Workflow

git add .                   # Stage your changes
rco                         # Enter interactive mode
# Choose to: edit, regenerate, select different variation, or abort

PR Description Generation

Generate comprehensive pull request descriptions from your changes:

Generate PR Description

rco pr generate             # Generate PR description for current branch
rco pr generate --base main # Compare against main branch

Open PR in Browser

rco pr browse               # Generate and open PR creation page
rco pr browse --base main   # Use main as base branch

PR Description Features

• Analyzes all commits since base branch
• Groups changes by type (features, fixes, docs, etc.)
• Generates following PR template conventions
• Includes breaking changes and deprecation notices

Examples

Conventional Commit

feat(auth): fix token refresh edge-case

Handle clock-skew by allowing ±60s leeway during token expiry checks. Adds retry on 429 and surfaces actionable errors.

GitMoji (with --fgm)

✨ auth: robust token refresh with retry

Allow ±60s clock-skew; add backoff on 429; improve error messages for invalid credentials.

With Context

rco -c "This fixes the OAuth flow for Google sign-in"

Configuration

Configuration Locations

1. Global: ~/.config/rustycommit/config.{toml,json}
2. Per-repo: .rustycommit.toml / .rco.toml
3. Environment Variables: RCO_* prefix

Priority: Per-repo > Global > Environment variables > Defaults

Basic Commands

rco config status                          # Secure storage status
rco config set RCO_AI_PROVIDER=anthropic
rco config set RCO_MODEL=claude-3-5-haiku-20241022
rco config set RCO_COMMIT_TYPE=conventional
rco config set RCO_EMOJI=true
rco config get RCO_AI_PROVIDER
rco config describe                        # Show all config options
rco config reset --all                     # Reset to defaults

Common Configuration Keys

Key	Description	Example
RCO_AI_PROVIDER	AI backend to use	anthropic, openai, ollama
RCO_MODEL	Model name	claude-3-5-haiku-20241022, gpt-4o-mini
RCO_API_KEY	API key	sk-..., gsk_...
RCO_API_URL	Custom endpoint	http://localhost:11434
RCO_COMMIT_TYPE	Commit format	conventional, gitmoji
RCO_EMOJI	Include emojis	true, false
RCO_LANGUAGE	Output language	en, es, fr, zh, ja
RCO_MAX_TOKENS	Max response tokens	1024
RCO_TEMPERATURE	Response creativity	0.7 (0.0-1.0)
RCO_DIFF_TOKENS	Max diff tokens	12000

Set Multiple Values

rco config set RCO_AI_PROVIDER=anthropic RCO_MODEL=claude-3-5-haiku-20241022 RCO_EMOJI=true

Describe All Options

rco config describe    # Comprehensive config documentation with examples

Multi-Account Support

Manage multiple AI provider accounts for different providers, models, or roles (work vs personal).

Account Management Commands

# Add a new account (interactive wizard)
rco config add-provider

# Add a specific provider with alias
rco config add-provider --provider openai --alias work-openai

# List all configured accounts
rco config list-accounts

# Switch to a different account
rco config use-account work-openai
rco config use-account personal-anthropic

# Show details of an account
rco config show-account work-openai
rco config show-account  # shows "default" account

# Remove an account
rco config remove-account work-openai

Interactive Add-Provider Wizard

Running rco config add-provider guides you through:

1. Provider Selection - Choose from 18+ providers
2. Account Alias - Memorable name (e.g., "work", "personal", "gpt-4")
3. Model Name - Optional, defaults to provider's recommended model
4. API URL - Optional, for custom endpoints or self-hosted providers
5. API Key - Stored securely in system keychain

Account Configuration File

Accounts are stored in ~/.config/rustycommit/accounts.toml:

[accounts.work-openai]
provider = "openai"
model = "gpt-4o-mini"
api_url = "https://api.openai.com/v1"

[accounts.work-openai.auth]
type = "api_key"
key_id = "rco_work_openai"

[accounts.personal-anthropic]
provider = "anthropic"
model = "claude-3-5-haiku-20241022"

[accounts.personal-anthropic.auth]
type = "env_var"
name = "ANTHROPIC_API_KEY"

[active_account]
alias = "work-openai"

Authentication Methods

• api_key - Stored securely in keychain
• oauth - OAuth tokens from provider
• env_var - Read from environment variable
• bearer - Bearer tokens in keychain

Providers

Works with 18+ providers. Configure via RCO_AI_PROVIDER.

OAuth-Enabled Providers (use rco auth login)

• Claude (Anthropic): OAuth with PKCE for secure authentication
• Claude Code: OAuth for Claude Code subscription users
• GitHub Copilot: OAuth for Copilot access

API Key Providers

OpenAI

rco config set RCO_AI_PROVIDER=openai
rco config set RCO_API_KEY=sk-...
rco config set RCO_MODEL=gpt-4o-mini
# Get keys: https://platform.openai.com/api-keys

Anthropic Claude

# OAuth (recommended)
rco auth login
# Or API key
rco config set RCO_AI_PROVIDER=anthropic
rco config set RCO_API_KEY=sk-ant-...
rco config set RCO_MODEL=claude-3-5-haiku-20241022
# Keys: https://console.anthropic.com/settings/keys

Claude Code OAuth

# OAuth login (works for both Anthropic and Claude Code)
rco auth login

# Claude Code subscription users can use the Claude Code model
rco config set RCO_AI_PROVIDER=anthropic
rco config set RCO_MODEL=claude-3-5-sonnet-20241022

OpenRouter

rco config set RCO_AI_PROVIDER=openrouter
rco config set RCO_API_KEY=sk-or-...
rco config set RCO_MODEL=openai/gpt-4o-mini
# Keys: https://openrouter.ai/keys

Groq

rco config set RCO_AI_PROVIDER=groq
rco config set RCO_API_KEY=gsk_...
rco config set RCO_MODEL=llama-3.1-70b-versatile
# Keys: https://console.groq.com/keys

DeepSeek

rco config set RCO_AI_PROVIDER=deepseek
rco config set RCO_API_KEY=sk-...
rco config set RCO_MODEL=deepseek-chat
# Keys: https://platform.deepseek.com/api-keys

xAI Grok

rco config set RCO_AI_PROVIDER=xai
rco config set RCO_API_KEY=...
rco config set RCO_MODEL=grok-beta
# Keys: https://x.ai/api

Mistral AI

rco config set RCO_AI_PROVIDER=mistral
rco config set RCO_API_KEY=...
rco config set RCO_MODEL=mistral-small-latest
# Keys: https://console.mistral.ai/api-keys

Google Gemini

rco config set RCO_AI_PROVIDER=gemini
rco config set RCO_API_KEY=...
rco config set RCO_MODEL=gemini-pro
# Keys: https://aistudio.google.com/app/apikey

Azure OpenAI

rco config set RCO_AI_PROVIDER=azure
rco config set RCO_API_KEY=<azure_api_key>
rco config set RCO_API_URL=https://<resource>.openai.azure.com
rco config set RCO_MODEL=<deployment-name>
# Docs: https://learn.microsoft.com/azure/ai-services/openai

Perplexity

rco config set RCO_AI_PROVIDER=perplexity
rco config set RCO_API_KEY=...
rco config set RCO_MODEL=llama-3.1-sonar-small-128k-online
# Keys: https://www.perplexity.ai/settings/api

Ollama (Local)

rco config set RCO_AI_PROVIDER=ollama
rco config set RCO_MODEL=mistral
rco config set RCO_API_URL=http://localhost:11434
# No API key needed for local models

Fireworks AI

rco config set RCO_AI_PROVIDER=fireworks
rco config set RCO_API_KEY=...
rco config set RCO_MODEL=accounts/fireworks/models/llama-v3p1-70b-instruct
# Keys: https://app.fireworks.ai/users/api-keys

Moonshot AI (Kimi)

rco config set RCO_AI_PROVIDER=moonshot
rco config set RCO_API_KEY=...
rco config set RCO_API_URL=https://api.moonshot.cn/v1
rco config set RCO_MODEL=kimi-k2
# Docs: https://platform.moonshot.ai/docs

Alibaba DashScope (Qwen)

rco config set RCO_AI_PROVIDER=dashscope
rco config set RCO_API_KEY=...
rco config set RCO_API_URL=https://dashscope.aliyuncs.com/compatible-mode/v1
rco config set RCO_MODEL=qwen3-coder-32b-instruct
# Keys: https://dashscope.console.aliyun.com/apiKey

Together AI

rco config set RCO_AI_PROVIDER=together
rco config set RCO_API_KEY=...
rco config set RCO_MODEL=meta-llama/Meta-Llama-3.1-70B-Instruct-Turbo
# Keys: https://api.together.xyz/settings/api-keys

DeepInfra

rco config set RCO_AI_PROVIDER=deepinfra
rco config set RCO_API_KEY=...
rco config set RCO_MODEL=meta-llama/Meta-Llama-3-70B-Instruct
# Keys: https://deepinfra.com/dash/api_keys

Vertex AI (Google Cloud)

rco config set RCO_AI_PROVIDER=vertex
rco config set RCO_API_URL=https://your-gateway/v1
rco config set RCO_MODEL=google/gemini-1.5-pro
# Requires gateway to Vertex's OpenAI-compatible endpoint

Secure Storage

When built with secure-storage feature:

• macOS: Keychain
• Linux: Secret Service (GNOME Keyring, KWallet, KeePassXC)
• Windows: Credential Manager
• Falls back to config file if unavailable

Git Hooks

Install Hook

rco hook set    # Install prepare-commit-msg hook
rco hook unset  # Uninstall

The hook automatically generates commit messages when you run git commit without -m.

Optional Hooks (Advanced)

Configure pre/post hooks in config (globally or per-repo):

# Pre-generation hook (run before AI generates message)
rco config set RCO_PRE_GEN_HOOK="just lint; just test -q"

# Pre-commit hook (after generation, can edit message)
rco config set RCO_PRE_COMMIT_HOOK="./scripts/tweak_commit.sh"

# Post-commit hook (after git commit completes)
rco config set RCO_POST_COMMIT_HOOK="git push"

# Hook behavior
rco config set RCO_HOOK_STRICT=false    # Allow hook failures (default: true)
rco config set RCO_HOOK_TIMEOUT_MS=60000 # Timeout in ms (default: 30000)

Per-Run Hook Control

rco --no-pre-hooks      # Skip pre-gen + pre-commit hooks
rco --no-post-hooks     # Skip post-commit hooks

Hook Environment Variables

Hooks receive these environment variables:

• RCO_REPO_ROOT, RCO_PROVIDER, RCO_MODEL
• RCO_MAX_TOKENS, RCO_DIFF_TOKENS, RCO_CONTEXT (pre-gen)
• RCO_COMMIT_MESSAGE, RCO_COMMIT_FILE (pre/post-commit)

MCP Server

Rusty Commit includes an MCP (Model Context Protocol) server for editor integrations.

Start MCP Server

TCP Mode (for Cursor, VS Code MCP extension):

rco mcp server --port 3000

STDIO Mode (for direct integration):

rco mcp stdio

Editor Integration

Cursor

1. Open Cursor Settings > Features > MCP
2. Add new MCP server:

   Type: HTTP
   URL: http://localhost:3000
   

3. Or use stdio with cursor-agent

VS Code

1. Install "MCP" extension by modelcontextprotocol
2. Add server configuration in settings.json

Claude Code

rco mcp stdio | claude-code connect stdio

MCP Tools Available

• generate_commit - Generate commit message from staged changes
• generate_commit_message - Alias for generate_commit
• get_config - Get current configuration
• set_config - Set configuration value
• list_accounts - List configured accounts
• use_account - Switch active account

Updates

rco update --check   # See if a new version is available
rco update           # Update using your install method
rco update --force   # Force update even if current
rco update --version 1.0.2  # Install specific version

Architectures

Prebuilt archives and packages for:

• Linux: x86_64 (gnu, musl), aarch64 (gnu, musl), armv7, riscv64
• macOS: x86_64, aarch64 (Apple Silicon)
• Windows: x86_64, i686

GitHub Action

Use the dedicated Rusty Commit GitHub Action for CI/CD workflows:

name: AI Commits
on: [push]

jobs:
  ai-commit:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: hongkongkiwi/action-rusty-commit@v1
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          RCO_API_KEY: ${{ secrets.RCO_API_KEY }}
          RCO_AI_PROVIDER: 'anthropic'
          RCO_MODEL: 'claude-3-5-haiku-20241022'
          confirm: true

Features

• Auto-installs latest Rusty Commit binary from releases
• 18+ AI providers including OpenAI, Anthropic, Ollama, Groq, and more
• Conventional commits and GitMoji formats
• Multi-language commit messages
• Auto-push support
• Version pinned releases for stability

See the action repository for full documentation.

Advanced Options

Token Management

For large diffs, Rusty Commit automatically chunks the input:

rco config set RCO_DIFF_TOKENS=12000   # Max tokens per chunk (default: 12000)
rco config set RCO_MAX_TOKENS=1024     # Max response tokens (default: 1024)
rco config set RCO_TEMPERATURE=0.7     # Response creativity (0.0-1.0)

Commitlint Integration

Generate commitlint configuration:

rco commitlint              # Generate commitlint.config.js
rco commitlint --set        # Non-interactive generation

Model Selection

List available models for your provider:

rco model --list            # List models for current provider
rco model --list --provider openai  # List OpenAI models

OAuth Authentication

rco auth login              # Login with default provider (Claude)
rco auth login --provider anthropic  # Specific provider
rco auth logout             # Remove stored tokens
rco auth status             # Check authentication status

File Exclusion

Exclude Files from AI Analysis

Via command line:

rco -x "package-lock.json" -x "yarn.lock"      # Exclude specific files
rco -x "*.lock" -x "*.min.js"                   # Exclude patterns

Via .rcoignore file: Create .rcoignore in your repository root:

# Dependencies
node_modules/
vendor/
Cargo.lock

# Build artifacts
*.min.js
*.map
dist/
build/

# IDE
.idea/
.vscode/
*.swp

# OS
.DS_Store
Thumbs.db

# Logs
*.log
npm-debug.log*

Files matching patterns in .rcoignore are excluded from the diff sent to AI.

Troubleshooting

Issue	Solution
401 / Invalid API key	Re-authenticate (rco auth login) or set valid RCO_API_KEY. For accounts, check rco config show-account.
Rate-limited (429)	Wait briefly; try lighter model or switch accounts (rco config use-account <alias>).
Secure storage unavailable	Falls back to file storage; check rco config status. Build with secure-storage feature for keychain support.
Account not found	Verify accounts exist with rco config list-accounts. Use exact alias name when switching.
Wrong account used	Check active account with rco config show-account. Switch with rco config use-account <alias>.
Hooks not running	Ensure .git/hooks/prepare-commit-msg exists and is executable. Re-install via rco hook set.
MCP server connection refused	Ensure server is running (rco mcp server). Check port matches editor config.
OAuth browser not opening	Set BROWSER=none to get URL manually, or use rco auth login --no-browser.
Windows PATH issues	Add install dir (%USERPROFILE%\.cargo\bin) to PATH.
Corporate proxy	Set HTTP_PROXY/HTTPS_PROXY environment variables.
Large diff truncated	Increase RCO_DIFF_TOKENS or exclude files with .rcoignore / -x.
Reasoning model outputs thinking tags	Use --strip-thinking flag or set RCO_STRIP_THINKING=true.
Commit message too long	Decrease RCO_MAX_TOKENS or set RCO_COMMIT_TYPE=conventional.

Debug Mode

RUST_LOG=debug rco -y     # Enable debug logging
rco --show-prompt         # See exact prompt sent to AI
rco --timing              # Show timing breakdown

Uninstall

• Homebrew: brew uninstall rusty-commit
• Cargo: cargo uninstall rusty-commit
• APT: sudo apt remove rusty-commit
• RPM: sudo rpm -e rusty-commit
• Remove config: rm -rf ~/.config/rustycommit/
• Remove accounts: rm -f ~/.config/rustycommit/accounts.toml

Compatibility

• Git 2.23+
• Rust 1.70+
• Works with per-repo overrides, multiple providers, and multi-account configurations
• Accounts stored separately in ~/.config/rustycommit/accounts.toml

Provider Compatibility Matrix

Provider	OAuth	API Key	Local	Notes
OpenAI	No	Yes	No
Anthropic	Yes	Yes	No	Claude, Claude Code
OpenRouter	No	Yes	No	Aggregator
Groq	No	Yes	No	Fast inference
DeepSeek	No	Yes	No
Ollama	No	No	Yes	Local models
Gemini	No	Yes	No
Azure	No	Yes	No
xAI	No	Yes	No	Grok
Mistral	No	Yes	No
Perplexity	No	Yes	No
Fireworks	No	Yes	No
Moonshot	No	Yes	No	Kimi
DashScope	No	Yes	No	Qwen
Together	No	Yes	No
DeepInfra	No	Yes	No
GitHub Copilot	Yes	No	No

Development

# Build
cargo build
cargo build --release
cargo build --features secure-storage

# Test
cargo test
cargo test --all-features
cargo test --doc

# Lint
cargo clippy --all-features -- -D warnings
cargo fmt

# Documentation
cargo doc --no-deps

Just Commands

just build              # Build project
just test               # Run tests
just fmt                # Format code
just clippy             # Run clippy
just all                # Run fmt, clippy, and test
just release            # Create release build

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Run cargo fmt and cargo clippy
5. Add tests for new functionality
6. Submit a PR

Security & Verification

All releases are cryptographically signed with multiple methods for maximum security.

Automatic Verification

The install script automatically verifies all downloads using the strongest available method.

Manual Verification

# Modern: Cosign/Sigstore (recommended)
cosign verify-blob \
  --bundle rustycommit-linux-x86_64.tar.gz.cosign.bundle \
  --certificate-identity-regexp "https://github.com/hongkongkiwi/rusty-commit/.github/workflows/release.yml@.*" \
  --certificate-oidc-issuer "https://token.actions.githubusercontent.com" \
  rustycommit-linux-x86_64.tar.gz

# Traditional: GPG signatures
gpg --keyserver hkps://keys.openpgp.org --recv-keys 0EC2DFF577818B86BA38DA3F164E3F90E425B2AD
gpg --verify rustycommit-linux-x86_64.tar.gz.asc rustycommit-linux-x86_64.tar.gz

# GitHub attestations
gh attestation verify rustycommit-linux-x86_64.tar.gz --repo hongkongkiwi/rusty-commit

# Package signatures (native)
dpkg-sig --verify rusty-commit_1.0.0_amd64.deb  # Debian/Ubuntu
rpm --checksig rusty-commit-1.0.0-1.x86_64.rpm  # Fedora/RHEL

Full verification guide: docs/VERIFICATION.md

Support the Project

If Rusty Commit saves you time, consider supporting ongoing development:

License

This project is licensed under the MIT License - see the LICENSE file for details.

Credits

Rusty Commit is inspired by the original OpenCommit by @di-sukharev.

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Build faster. Commit smarter.