> Raising only because others cited concerns this might cause issues in personal harness contexts. It doesn't.

It literally cannot.

> Obviously, I wasn't claiming that it would WORK for cross-model subagents

I know, but you were questioning (before investigating) if maybe it did, which I'm saying should have been obvious it wouldn't, if you had understand how this was encrypted.

> requiring use of the Codex harness to operate

Yes, if you want to use Sol + Ultra + sub-agents, you'd need to use the endpoints provided by OpenAI, as (again), the content is encrypted on OpenAI's side, it's not technically possible for other platforms to implement OpenAI's encryption.

And of course this doesn't impact anyone else not using Codex + Sol + Ultra + launching subagents, it's the specific combination that is "protected", not the individual pieces.