opencommit

It analyzes the staged git diff and uses GPT-4o, Claude, Gemini, or any OpenAI-compatible model to produce commit messages that follow conventional commit formats including type prefixes (feat, fix, refactor, docs), scope annotations, and concise one-line summaries with optional extended descriptions.

The tool integrates directly into git workflows via a simple command (oco) that replaces the standard git commit step, with no changes to the rest of the development process.

OpenCommit supports custom commit message conventions through configurable prompts, allowing teams to enforce their preferred style (Conventional Commits, Gitmoji, custom formats) across all commits automatically.

It includes a git hook installation option that intercepts commit messages before they are finalized, making it transparent to developers who prefer the standard git commit workflow.

OpenCommit is open-source under the MIT license and available via npm. It supports multiple LLM backends with configurable API keys and model selection, and includes a local model option via Ollama for teams that prefer on-device processing.

The project has become one of the most-starred developer productivity tools in the git tooling space, reflecting the near-universal developer experience of writing vague commit messages under time pressure and the value of automated generation that produces consistently informative history.

It is installable globally and works with any git repository regardless of language or framework.