Uploaded April 2026 | Updated September 2026, 1 week ago

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Learn how to build AI coding agents that run completely AFK in isolated sandboxes. In this video, I introduce Sandcastle, a TypeScript library that lets you orchestrate Claude Code and other agents to automatically pick up tasks, implement features, review code, and merge it back to main—all without constant permission requests. Discover how to set up agents to run in parallel with proper sandboxing, handle complex workflows, and scale your development velocity.

The repo:

github.com/mattpocock/sandcastle

Learn more about my agent skills:

https://www.aihero.dev/s/wuvIE1

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twitter.com/mattpocockuk

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https://aihero.dev/discord