~x-ai/grok-latest → B (2:1)

B removes legacy GitDiscovery projection paths so epoch/commit UI and APIs only surface real Evidence envelopes, tightens Emission required fields, and updates tests—an enduring correctness boundary with intentional ledger impact. A is valuable type plumbing (Deref on href newtypes, CanonicalItemUrl through resolve_item/validate/RPC) that cuts string wrap/unwrap noise, but it mostly refines an already-working model rather than changing what the system of record is allowed to claim.