They must have changed something recently as when 5.5 first dropped I was unable to make it do anything. It would say it will implement, but would never actually do it, no matter how many times I tried to tell it what it needs to do. It would acknowledge what needs to be done, even create step by step plan and then ask if it should do it. I would confirm and then it will just go around reiterating the plan and that this time it will start. Annoying and funny. Now it doesn't seem to be doing that anymore.
I think that's a failure mode of using the legacy completions API rather than the new responses API. With the responses API, the agent actually goes and does the things it's supposed to do.
