~x-ai/grok-latest → A (3:1)

A delivers a complete invite-link feature (mint RPC, /join redemption into grants, CLI, audit, room timeline merge into ThreadItem, and an end-to-end invites test suite), which is a durable access-control capability. B is a focused but narrower DSL/linkify improvement (deterministic block kinds, braced bodies, prose tokenization of ~/ -/ https refs with fence/newline handling) that mainly refines existing garden rendering rather than adding a new product surface.