I told one AI to demolish the handoff prompt I wrote for another AI. It found a test that passes even when it's empty

I'm building an app with Claude Code right now.

The setup is a little unusual. One "commander" session writes the instructions, and separate "worker" sessions implement them in parallel.

The commander never touches the keyboard itself. Its whole job is to turn "what to do next" into a handoff prompt that a worker can read and just run with.

And that handoff prompt is quietly the scariest thing in the whole loop.

The moment I hand it over, the worker trusts it as the spec and starts sprinting.