gac (Git Auto Commit)

gac is a CLI tool that uses AI to automatically generate Git commit messages from your changes and help manage basic Git workflows like staging, syncing, and pushing.

What it does

• Generates commit messages from your staged changes using AI
• Follows Conventional Commits style (or other formats you choose)
• Helps manage Git workflow (stage, pull, push, PR prompts)
• Filters noise like lock files automatically
• Supports custom styles like minimal, detailed, vibe, and verbose
• Smart diff truncation that preserves file boundaries
• Validates commit messages against Conventional Commits spec

Installation

npm

npm install -g gac-cli

bun

bun install -g gac-cli

From source

git clone https://github.com/ravvdevv/gac.git
cd gac
bun install
bun link

Setup

Set your API key:

gac --key <YOUR_API_KEY>

(Optional) Set model:

gac --model <MODEL_ID>

Check config:

gac config

Usage

Run inside a Git repo:

gac

Useful commands

Command	Description
gac --dry-run	Generate message without committing
gac --dry-run --json	Generate message, output as JSON
gac --copy	Copy generated message to clipboard
gac --amend	Amend last commit message with AI
gac --yes	Bypass all prompts (headless mode for CI/agents)
gac --scope auth	Override commit scope (e.g., auth, api, ui)
gac --no-emoji	Strip emojis from generated messages
gac --no-sync	Skip remote update checks (offline mode)
gac --no-verify	Skip Git pre-commit hooks
gac config	Show current configuration
gac install-hook	Install pre-commit hook
gac validate "feat: test"	Validate a commit message

Examples

Dry run with scope override:

gac --dry-run --scope auth

Headless mode for CI:

gac --yes --no-sync

Validate a message:

gac validate "feat(auth): add login endpoint"

Options

Option	Description
--key <apiKey>	Set OpenRouter API Key
--model <model>	Set AI Model
--style <style>	Set Commit Style (conventional, vibe, minimal, detailed, verbose)
--scope <scope>	Override commit scope (e.g., auth, api, ui)
--prompt <prompt>	Set Custom System Prompt (text or path to file)
--verbose, -v	Show detailed logs and raw AI interactions
--amend	Amend last commit message with AI
--dry-run	Generate message without committing
--copy	Copy generated message to clipboard
--yes, -y	Bypass all prompts (headless mode)
--json	Output results as machine-readable JSON
--no-sync	Disable remote update checks (offline mode)
--no-verify	Skip Git pre-commit hooks
--no-emoji	Strip emojis from generated messages

Commit Styles

Style	Description
conventional	Standard Conventional Commits format
vibe	Adds Gitmoji emoji to messages
minimal	As short as possible
detailed	More context in subject
verbose	Includes detailed body with bullet points

Ignore files

Use .gacignore to exclude files from AI analysis. Supports glob patterns:

# Lock files
*.lock
package-lock.json

# Build output
dist/
build/

# Generated files
*.generated.js
src/generated/

# Specific files
README.md

AI Discovery

On first run, gac can create AI discovery files (.agent, .cursorrules, .windsurfrules, .aiannotations) that tell AI coding agents to use gac instead of raw git commit.

License

Raven License. See LICENSE file.

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Maintained by Raven