Vercel ships Run SDK: sandboxed eval for agent code with human-approval pause/resume
cramforce · x · 2026-08-26
Vercel released Run SDK, a package for executing untrusted JavaScript/TypeScript generated by agents:
- Code runs in a fresh QuickJS sandbox inside a worker thread, with no direct route to Node.js, the network, or app secrets.
- Apps expose only approved operations via hostFunctions, which become callable globals inside the sandbox.
- Execution can pause at authentication or human-in-the-loop approval boundaries, then resume without repeating completed work.
- Install with pnpm add run; runs anywhere Node.js runs, already shipped in AI SDK as the new primitive for code mode.
Related event: Vercel Launches Run SDK for Sandboxed Agent Code Execution(3 posts)→
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