Optional result metadata riding beside the IR (DD-005 §4.2) — no IR schema bump; structured-cloneable across the worker boundary (thumbnail bytes transferable).
Optional
Every applied adapter (composition, amendment 1).
Whitelisted key/value settings only — bounded, never local paths.
Optional result metadata riding beside the IR (DD-005 §4.2) — no IR schema bump; structured-cloneable across the worker boundary (thumbnail bytes transferable).