Show HN: GitPT – AI commit messages with Apple's on-device Foundation Models (github.com)

GitPT, a new tool designed to enhance the Git workflow, automates the generation of commit messages using on-device AI models, specifically Apple's Foundation Models. This command-line alias seamlessly integrates with Git, allowing users to write commit messages effortlessly by summarizing changes file by file to fit the AI model's context window. Unlike traditional large remote models, GitPT operates locally, ensuring privacy and reducing reliance on cloud services—all while maintaining full Git functionality for other commands. This innovation is particularly significant for the AI/ML community as it demonstrates the practical application of lightweight AI models in real-world development environments. With no need for API keys or external sign-ups, developers can harness AI capabilities directly from their Mac devices running macOS 27 or later. GitPT not only enhances productivity by streamlining the commit message process but also respects existing commitlint rules, ensuring that the generated messages adhere to coding standards. Its flexibility in supporting both on-device and remote AI models makes GitPT a versatile addition to the developer toolkit, reflecting the growing trend of integrating AI tools into daily workflows.