Consult device check uses a loopback dummy on straylight. Heartbeat stays behind a subagent a live turn is waiting on. Section 11 is complete.
Nested subagent allowed; completion is a ToolResult; name stays subagent. Cloud-led sessions later at public taint. Consult URL and heartbeat priority still open.
M5d-2 is on master. The spec is proposed; section 11 is the owner's questions.