Those two things aren’t mutually exclusive. It may be worthwhile to at least have Claude (or whatever LLM you favor) to look at the other libraries and compare it to yours. It doesn’t have to write the code, but it could point out areas/features you’re missing.
We know what we're missing (a lot, we didn't implement the full spec). We don't know what weird edge cases the clients/servers will have, and I would bet you decent money a LLM won't either. That's why manual testing and validation is so important to us.