Stable identity for an exactly resumable generation. The prompt already
includes rendered messages and tool schemas; the remaining fields cover
every sampling policy that can change the continuation. The KV scheme is
the composition's: the store holding the checkpoint is keyed by it.
Stable identity for an exactly resumable generation. The prompt already includes rendered messages and tool schemas; the remaining fields cover every sampling policy that can change the continuation. The KV scheme is the composition's: the store holding the checkpoint is keyed by it.