The row-layout half of a composition's KV scheme, over one request's layer caches: where its serial caches (the graph's composed legos) join row layouts. The legos convert themselves inside their own appends; nothing here converts a serial cache.
Optional
Limit committed work at a pending precision transition.
Bind state requiring row-local maintenance before shared decode.
Bind all precision policies before a prefill cohort owns row boundaries.
The row-layout half of a composition's KV scheme, over one request's layer caches: where its serial caches (the graph's composed legos) join row layouts. The legos convert themselves inside their own appends; nothing here converts a serial cache.