A lavinmq provider and an amqp-ping consumer ride laptop while the
substrate's own broker owns 5672 on anchor — the twin of two-node-db.
lavinmq is the mesh's control broker AND a user-facing capability, so a
provider must publish 5672 for its consumers and cannot share a node
with the control broker that already owns it; the split unblocks the
chain single-node.
The bed proves, layered: the run-once bootstrap computed the admin hash
and wrote the broker config before the broker started (ADR 0052); the
service and both runtimes are up and stable; each module got its scoped
broker account on the substrate broker; the provisioner created the
consumer's vhost AND user, both named for the derived login; and the
consumer connected to that vhost with the mesh-minted password and
round-tripped a message. The consumer uses ${bound:amqp:as} for user
and vhost both, and the provider's serves carries the port.
Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF
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