gac 1.14.0

LLM-powered Git commit message generator with multi-provider support

🚀 Git Auto Commit (gac)

LLM-powered commit messages that understand your code.

Tired of writing commit messages? Replace git commit -m "..." with gac for contextual, well-formatted commit messages generated by large language models.

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What You Get

Intelligent, contextual messages that explain the why behind your changes:

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Quick Start

Use without installing

uvx gac init  # Configure your LLM provider
uvx gac  # Generate and commit with LLM

That's it! Review the generated message and confirm with y.

Install gac globally

uv tool install gac
gac init
gac

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Key Features

🌐 Supported Providers

• Anthropic • Cerebras • Chutes.ai • DeepSeek • Fireworks
• Gemini • Groq • LM Studio • MiniMax • Ollama • OpenAI
• OpenRouter • Streamlake • Synthetic.new • Together AI
• Z.AI • Z.AI Coding • Custom Endpoints (Anthropic/OpenAI)

🧠 Smart LLM Analysis

• Understands intent: Analyzes code structure, logic, and patterns to understand the "why" behind your changes, not just what changed
• Semantic awareness: Recognizes refactoring, bug fixes, features, and breaking changes to generate contextually appropriate messages
• Intelligent filtering: Prioritizes meaningful changes while ignoring generated files, dependencies, and artifacts

📝 Multiple Message Formats

• One-liner (-o flag): Single-line commit message following conventional commit format
• Standard (default): Summary with bullet points explaining implementation details
• Verbose (-v flag): Comprehensive explanations including motivation, technical approach, and impact analysis

💻 Developer Experience

• Interactive feedback: Regenerate messages with specific requests like r "make it shorter" or r "focus on the bug fix"
• One-command workflows: Complete workflows with flags like gac -ayp (stage all, auto-confirm, push)
• Git integration: Respects pre-commit and lefthook hooks, running them before expensive LLM operations

🛡️ Built-in Security

• Automatic secret detection: Scans for API keys, passwords, and tokens before committing
• Interactive protection: Prompts before committing potentially sensitive data with clear remediation options
• Smart filtering: Ignores example files, template files, and placeholder text to reduce false positives

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Usage Examples

Basic Workflow

# Stage your changes
git add .

# Generate and commit with LLM
gac

# Review → y (commit) | n (cancel) | r (reroll)

Common Commands

Command	Description
gac	Generate commit message
gac -y	Auto-confirm (no review needed)
gac -a	Stage all before generating commit message
gac -o	One-line message for trivial changes
gac -v	Verbose format with Motivation, Technical Approach, and Impact Analysis
gac -h "hint"	Add context for LLM (e.g., gac -h "bug fix")
gac -s	Include scope (e.g., feat(auth):)
gac -p	Commit and push

Power User Examples

# Complete workflow in one command
gac -ayp -h "release preparation"

# Detailed explanation with scope
gac -v -s

# Quick one-liner for small changes
gac -o

# Debug what the LLM sees
gac --show-prompt

# Skip security scan (use carefully)
gac --skip-secret-scan

Interactive Reroll System

Not happy with the result? Use the reroll feature for intelligent regeneration:

# Simple reroll
r

# With specific feedback
r make it shorter and focus on the performance improvement
r use conventional commit format with scope
r explain the security implications

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Configuration

Run gac init to configure your provider interactively, or set environment variables:

# Example configuration
GAC_MODEL=anthropic:your-model-name
OPENAI_API_KEY=your_key_here
ANTHROPIC_API_KEY=your_key_here

See .gac.env.example for all available options.

Want to customize commit message style? See docs/CUSTOM_SYSTEM_PROMPTS.md for guidance on writing custom system prompts.

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Getting Help

• Full documentation: USAGE.md - Complete CLI reference
• Custom prompts: CUSTOM_SYSTEM_PROMPTS.md - Customize commit message style
• Troubleshooting: TROUBLESHOOTING.md - Common issues and solutions
• Contributing: CONTRIBUTING.md - Development setup and guidelines

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Made with ❤️ for developers who want better commit messages

⭐ Star us on GitHub • 🐛 Report issues • 📖 Full docs