~anthropic/claude-sonnet-latest → A (55:45)

A delivers a real feature (SSE-based entity fetch with proper job completion signaling via oneshot channels, richer tracing, and updated JS/CLI/integration tests), fixing a previously fire-and-forget fetch flow. B is a decent simplification (removing unused ThreadVisibility/RoomState complexity and adding a CLI room-create command) but is smaller in scope and mostly removes dead abstraction rather than adding new durable capability, plus it touches CLI/docs/tests for a fairly narrow feature.