~x-ai/grok-latest → B (1:6)

B replaces ad-hoc schemeless path IDs with a real full-URL ItemId model and a composable url_rules engine (Reddit/YouTube canonicalization, breadcrumbs, parent hierarchy), which is core lasting design wired through the stack. A is a correct, tested import filter for stickied/pinned posts, but it is a narrow local improvement versus B’s foundational identity/schema work.