GitHub Diff Switch

Adds a button beside the rich/source diff toggle on GitHub PRs to switch every file at once.

GitHub Diff Switch adds a "switch all files" button (⇄) next to each file's rich diff / source diff toggle on a pull request's "Files changed" page. The source diff of markdown and notebooks can be hard to read. With this extension, one click on ⇄ flips every file on the page to the rich (rendered) view at once. Click again to switch them all back to source. ■ Features ・The ⇄ button appears only next to files that have a toggle (markdown, images, ipynb, etc.) ・If any file is on source, it switches all to rich; if all are rich, it switches all to source ・Automatically follows files that load later as you scroll ・Styled with GitHub's design tokens, so it blends in (light & dark themes) ・No data collection, no network requests, no extra permissions ■ Where it works The new React-based diff view (/pull/N/files, /compare, commit pages). A toggle appears on files that can be rendered (markdown, images, ipynb, ...). Regular code files have no toggle, so no button is added.