Show HN: Give your files an undo button

Re:Show HN: Give your files an undo button by robby04 on Monday July 06, 2026 @03:44PM (#48809553)

neat idea. do you hook into the filesystem directly or is this more of a wrapper around specific apps

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Re:Show HN: Give your files an undo button by dantelex on Monday July 06, 2026 @08:05PM (#48812095)

It hooks into the filesystem directly. Undo runs as a background watcher on a folder/project, sees file changes regardless of which app made them, and snapshots local history into ~/.undo/.

So it’s not wrapping specific apps like Cursor, VS Code, etc. Any editor or tool that writes files is covered.

It's also OSS, you can check it out.

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