This is an interesting space. Right now we've gotten to a point where agents can do most tasks, but they will get lazy/skip steps if you're not precise in the requirements. We need ways to validate that expands beyond software tests. This is a good direction but a few thoughts:
1. From what I can tell the agent who does the task is running the validation. Keeping the validation agent as a separate context avoids the validator knowing what the software is supposed to do vs what it does
2. There's a lot of prior art around org structures to validate things that we've built out over the last ~100 years that we can apply in this space. E.g. look at the way that blind trials are run