DL-190

The case-2 brief carrier is a PER-PAIR manager↔peer DM channel (ChannelKindDM, 2 members: spawning manager + new peer, both owners carried by expandOwnerMembership so the operator retains visibility), auto-provisioned on the spawn edge (T-R0) — NOT the manager’s coordination channel, which is a broadcast to all reports. Token-minimization: siblings do not receive briefs they don’t need. UI channel-proliferation UX is a known deferred problem

Status: Active (Matt, 2026-08-10)

Record: ../../agent/compass-first-turn-delivery/design.md#approach