Nolomon/Commit-Message-Gen-VS-X ? reverse-engineered prompt

Build me a VS Code extension that helps generate Git commit messages with AI right inside the Source Control view.

I want it to add a button in the Source Control header, and when I click it, it should look at my staged changes and write a good commit message into the commit box for me. The messages should follow Conventional Commits, like feat, fix, docs, and so on.

Please make it support multiple AI providers and models, including Anthropic, OpenAI, Google, DeepSeek, and Mistral. On first use, it should ask me for the API key for whichever provider I choose, and it should store keys securely in VS Code so I do not have to keep typing them in.

Also add simple commands so I can set the model, set the API key, and clear the API key. If you need to check current provider docs online, go ahead and do that.