POST /api/desk/{mind}/answers behind one pipeline: raw target, bearer, audience,
scope, Active membership, body shape, {mind} lookup, door. Mapped only when the
Desk section exists; a configured desk without its credential and door ports
stops startup. Stale_fork answers carry the current card read through the door.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
