sandcastle

Why we included this project

Sandcastle answers a specific problem: you've got coding agents like Claude Code doing real work, and you want to run several at once against the same codebase without them colliding. A single TypeScript call launches the agent in an isolated sandbox (Docker, Podman, or Vercel's Firecracker microVMs, plus any provider you write yourself) and merges its commits back onto your branch when it finishes. That suits teams parallelizing long-running agent tasks that would otherwise interfere with each other, and it fits review or CI pipelines that need contained, repeatable runs. Sandcastle also owns the fiddly parts, sandbox lifecycle and branch merging, so you are not gluing those together with shell scripts.