ADR 0002: Commands always return result plus patches

Status: accepted (2026-09-09)

Every command frame carries a patch list keyed by global identity Type:id. The runtime derives set patches from the projected result automatically; resolvers add set/del/inv/invOp for side effects. Clients apply patches to a normalized cache, so every earlier query result that contained an affected entity is updated without a refetch.

Alternatives rejected: refetch-on-mutation (N extra round trips, stale windows), cache invalidation only (loses the new values), client-side hand-written cache updates (the Apollo/Relay failure mode).