AI coding agents lie about their work. Outcome-based verification catches it.

AI coding agents have a consistency problem. Ask one to add authentication to your project and it'll tell you it's done. Commits made, tests passing, middleware wired up. Check the branch and you'll find a half-written JWT helper, no tests, and a build that doesn't compile. This isn't a hallucination problem. The agent did produce code. It just didn't verify that any of it worked before declaring victory. And neither did the tools sitting between the agent and your main branch.