Common-Six Social Packs — First Real Packs on the Structured-Output Surface

Six pack identities (linkedin, x, bluesky, youtube, facebook, wikipedia) registered against one consolidated backend service that routes by pack_id, with Tavily as the underlying search and URL-shape verification driving the confidence score. No new microfrontend per pack — Response Reviewer's generic candidate card already renders every pack response. A small new Pack Runner remote provides the per-row × per-pack fan-out affordance so the foundation dataset can be augmented and reviewed today, before the bundle abstraction lands in a later session.