Comment by chickensong

It's not exactly the doc you'd need for a human. There could be overlap, but each side may also have unique requirements that aren't necessarily suitable for the other. E.g. a doc for a human may have considerably more information than you'd want to give to the agent, or, you may want to define agent behavior for workflows that don't apply to a human.

Also, while it may be hip to call any LLM output slop, that really isn't the case. Look at what a poor history we have of developer documentation. LLMs may not be great at everything, but they're actually quite capable when it comes to technical documentation. Even a 1-shot attempt by LLM is often way better than many devs who either can't write very well, or just can't be bothered to.