Would you care to share the name of a good harness which might qualify someone to talk about AI's limits? There's quite a lot of big tech companies and well funded startups using Claude Code and Codex, although I suppose it's possible that none of them know what they're doing.
I'd probably break NDA if I said anything about ours, sadly. I don't know of any publicly available harness on the same level as what big tech companies use internally.