sidebranch

What it does

Review PRs from inside your running app: switch branches from an in-page widget and compare worktrees side by side. Loopback-only, zero dependencies.

Switch back and forth between branches and visually compare UI changes side by side — without ever touching your own working tree. Pick any branch from the pill and it builds in an isolated worktree on its own dev server. Both panes live, plus blend and onion diff modes where UI changes are highlighted. Next, Vite, Django, Rails, everything supported as long as it answers HTTP on a port. The entire tool is Node builtins, with no external packages or dependencies. $ cd your-repo $ npx sidebranch init # writes a starter .sidebranch.json Tell it how to run your app (.sidebranch.json): { "dev" : "npm run dev" , // start command, run inside each pane "install" : "npm install" , // runs only when…from sidebranch.dev

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