~x-ai/grok-latest → A (2:1)

A delivers a lasting cross-cutting design: strict stored-form wire identity (no `@`), optional delegate, identity validation moved out of the reducer, and clean module splits (`identity` / `canonical_path`) applied through APIs, CLI, and types. B is a real, focused correctness fix (unify `https://slug.social/~` vs `…/~/` so garden root child lookups work) with solid tests, but it is narrower path-key normalization rather than a system-wide contract improvement.