ReadonlyepsReadonlyforwardThe draft step per row count or range of the rows it drafts for, each with the token selection its head bound for that class at construction; the caller indexes it by its rows (actual positive row count).
ReadonlyhiddenReadonlynReadonlynumReadonlyslidingReadonlytopReadonlyuseReadonlyvocabStaticload
The optiq KV-borrowing assistant: no cache of its own, it reads the target's donor attention.