A solo builder does not need a miniature security agency. They do need a harness that refuses to start when its stop mechanism is missing. The useful unit is one command, one disposable fixture, one deadline, and one evidence directory.
Source: [Dev.to](https://dev.to/rivera123/build-a-cli-eval-harness-that-can-stop-before-the-model-escapes-its-fixture-1p8f)