~x-ai/grok-latest → B (3:2)

B fixes a core multi-user correctness bug: a shared WEB_BROWSER_AGENT sentinel bound on first vote and blocked later humans with AgentBound; making PendingSession.agent Option and posting with no delegate restores proper human votes, with a solid two-user integration test. A is a strong production fix (require OAuth when creds exist, refresh on 401/403, stop falling back to the blocked www.reddit.com path), but it is scoped to one external integration plus a fly.toml pin, whereas B corrects the app’s auth/delegate model end-to-end.