An opinionated commit message generator for git.

Installation

npm i -g gcmg@latest

Usage

Generate a commit message

gcmg # or git msg

Ask a question about git

gcmg how do I remove sensitive data from git history?

Follows a proven structure

Follows the Conventional Commits format.

example:

feat!: send an email to the customer when a product is shipped

Configuration

Run gcmg config to configure

$ gcmg config

? Select your preferred AI provider » - Use arrow-keys. Return to submit.
>   OpenAI
    Anthropic
    Google
    Custom OpenAI Based Provider

If you are using a custom OpenAI based provider, you need to enter the model ID and the base URL.

Select your model from the list of available models.

√ Select your preferred AI provider » Anthropic
? Select your preferred model »
>   claude-sonnet-4.6
    claude-opus-4.6
    claude-opus-4.5
    claude-haiku-4.5
    claude-sonnet-4.5
    claude-opus-4.1
    claude-opus-4
    claude-sonnet-4
    claude-3.7-sonnet
  ↓ claude-3.7-sonnet:thinking

Uses openrouter to fetch the list of available models. Check out generate-models.ts to see how it works.

License

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

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