Orchestrate sandboxed coding agents in TypeScript with sandcastle.run()
Sandcastle is a TypeScript library that runs AI coding agents inside isolated sandboxes and merges their branch changes back into a project. It is used to run agents in parallel, build review pipelines, or coordinate agent work through providers such as Docker, Podman, or Vercel.
Latest release v0.14.0 · 2 Nov 2026
5 files for Claude Code, Codex and OpenCode: pre-release, sandcastle, sandcastle AGENTS.md, sandcastle CLAUDE.md and 1 more — 1,290 tokens loaded in every session.
AGENTS.md A 4 tok CLAUDE.md A 1,286 tok .claude/settings.json A — .agents/skills/pre-release/SKILL.md A 14 tok .agents/skills/verify/SKILL.md A 55 tok These files are mattpocock/sandcastle's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.