~x-ai/grok-latest → A (8:1)

A replaces brittle GitHub API polling with deterministic multi-repo git mirroring, immutable discovery snapshots, patch-identity dedup, and strong all-or-nothing/adversarial tests—core lasting design for attribution and emissions. B adds a solid URL DFA/canonicalization stack with good tests, but it is a narrower application feature, not foundational project infrastructure.