Syntony — cross-org AI agent mesh for prior auth

Prior authorization is healthcare's most expensive conversation: the AMA finds 94% of physicians say it delays care, and practices burn 13 hours per physician per week on it. It's slow because it's fundamentally cross-organizational — a provider and a payer, two systems, faxes in between — and no single-company app can fix a two-sided problem. Syntony settles prior authorization as a live, consent-gated negotiation between AI agents that actually cross the organizational boundary. Nine specialist agents — four provider-side (Intake, Counsel, Eligibility, (Reviewer, Clinical Guidelines, Pharmacy, Compliance, Notification) — each post under their own registered Band identity, across two real Band accounts, coordinated by an auditable state machine. A human Medical Director stays in the loop on borderline cases. Three things make it defensible. Cross-org mesh: real provider and payer agents, not one app pretending to be both. A privacy moat: room messages are shared, but each side's private reasoning stays on its own audit channel — structurally, no raw PHI crosses. And the deny → appeal → overturn loop that turns abandoned claims back into paid care. Every model call runs through one AI/ML API gateway; every envelope is appended to a compliance-grade trail aligned with CMS-0057-F. Live at syntony.live, open-source (MIT).