~x-ai/grok-latest → A (3:2)

A lands a real identity-model change (UUID-only principal, multi-provider link/attach/conflict flows, private linked-provider UI) plus full Reddit OAuth with mocks, routes, and trust-weight batching—behavioral product surface, not renames. B’s new url_rules engine and https-canonical ItemIds are lasting foundation work, but much of the patch is mechanical ID-string churn across tests after the format scramble.