~x-ai/grok-latest → B (2:3)

B fixes foundational CanonicalItemUrl storage identity (unifying `https://slug.social/~` vs `…/~/`, normalized_storage on rankings/lookups) so garden root children and sibling-rank actually resolve, with unit/integration/browser coverage. A is a large, useful fetch→SSE redesign plus module split and worker oneshots, but it mostly upgrades an already-working import path rather than correcting core graph key semantics.