### Description Currently, `cph-submit` works wonderfully for submitting Codeforces solutions directly from VS Code. It would be an amazing quality-of-life improvement if we could get the same auto-submit functionality for **AtCoder**. AtCoder is one of the most popular platforms for competitive programming, and manually copying and pasting code from the editor to the browser during contests can break the workflow. ### Proposed Solution - Extend the browser extension's permissions/manifest to recognize `atcoder.jp` domains. - Add an automated script/handler within the extension to handle form authentication/submission fields on AtCoder's submit pages. - Integrate with the main CPH VS Code extension so the "Submit" button appears when working on an AtCoder problem. ### Additional Context - AtCoder problems are already parsed easily using the Competitive Companion extension, so adding the submit feature would complete the loop for AtCoder users. - I'd be happy to test any beta versions or help map out the DOM elements for the AtCoder submission form if needed!