burrow

What it is

• A browser-based dev machine that runs Bun, git, a shell, a live server preview, and a local AI coding agent entirely in the browser. It perserves workspace by snapshotting to IndexedDB.

How it works

• Uses bun.wasm (Rust transpiler) driven through a WASI shim to transpile code in-browser.
• A virtual filesystem is shared across editor, shell, git, package manager, and runtime; in-memory tree is snapshotted to IndexedDB.
• Web Workers run per bun run process; a service worker bridges Bun.serve() to a page URL for in-page server previews.
• Network calls Burrow itself makes are limited to a CORS proxy for git clone and npm registry fetches, both same-origin passthroughs visible in server.ts.

Getting started

• Quickstart requires Bun ≥ 1.3.
• Commands from README:
• "bun install"
• "bun run dev" # dev server with HMR
• Open http://localhost:4808
• Additional commands:
• "bun test" # run the suite (~340 tests)
• "bun run build" # static bundle into dist/

Recent releases

• There are no releases listed in the repository (latest 0).

Traction

• Stars: 37
• Forks: 3
• Open issues: 0

Behind the repo

• License: MIT
• Created: 2026-07-14
• Last pushed: 2026-07-15
• Language: TypeScript

Caveats

• Compatibility notes include no raw TCP, no native addons, and limited Bun.serve fetch handlers only (no routes/websocket yet), no git push/pull, no npm lifecycle scripts. Documentation references COMPAT.md for full details.