This is the expanding environment seam. The public opening volley can now shove off into Wowdeck without another route rewrite.
Current origin: prn.
Stub host for the whole Wowdeck choreography: deck selection, stage movement, lane shifts, and return vectors.
This is intentionally stubbed but visible so the choreography can expand in-place: card decks, vector-to rehearsal, remembered return points, and PanelV / Wow insertion.