A patient texts in once and never leaves the thread. Every leg writes to one longitudinal record (the dark hub), and that closed loop is the moat. Stations are colored by what is real software, synthetic, or a disclosed human concierge step (Plan B walkthrough).
A patient burst is coalesced at the edge, routed deterministically, answered by agentic specialists, assembled, guarded, and sent as one reply.
The deterministic coordinator never sees PHI. It fans out to five agentic specialists, each an LLM reasoning over deterministic tools.
Routing is PHI-free, specialists carry PHI under BAA + ZDR, and the outbound surface is tiered with the guard as the final word.
A parallel pipe, not in the sync path: a data event drives research, a doctor signs off, then the CLI guard sends.
Agentic specialists orchestrate three operator CLIs: linq-pp-cli (send guard, capability, webhooks, consent), context.dev (doctor discovery), and llamaparse (research ETL). Each is a tool, not an agent.
Every send passes a fail-closed AND-gate. The first four checks already exist in linq-pp-cli send-preflight; the tier classifier and template re-render are the P2-c/P2-d amendment.
Papers are parsed by llamaparse into markdown, chunked and embedded (the gap P5-a fills), retrieved by the researcher, signed off by a doctor, and delivered through the same guard.