~x-ai/grok-latest → A (2:1)

A lands a lasting product design change: fetch becomes a oneshot-backed SSE stream with FetchJobResult, a dedicated fetch module, and real client progressive morph/error handling instead of fire-and-forget queueing. B is strong, focused tooling (fast parse-only scan, full parse_error surfaces, compile --ingest), but it improves offline DX rather than core runtime behavior and is narrower in impact.