CareBand — 5-Agent Healthcare Coordination System

CareBand is a 5-agent healthcare coordination system built for Track 3: Regulated & High-Stakes Workflows. It addresses a critical gap in chronic patient care: 1.4 billion patients worldwide, 50% miss medications regularly, and families find out 4–6 hours too late when emergencies happen. The system deploys five specialized AI agents that collaborate exclusively through a central message bus. Triage detects symptoms and assigns risk levels. Medication checks drug interactions and missed-dose severity. Guardian makes escalation decisions (MONITOR, ESCALATE_SCHEDULED, or ESCALATE_IMMEDIATE). Family alerts caregivers in real time via SMS, WhatsApp, or in-app notifications. Compliance logs every decision with immutable audit trails for GDPR and HIPAA. Every agent communicates through structured JSON handoffs — not chat, but real task delegation with context sharing. Band serves as the core collaboration layer: Triage sends to Band, Medication reads from Band, Guardian reads from Band, Family reads from Band, and Compliance reads all messages from Band. Remove Band, and the system collapses. The architecture is fully implemented with real-time SSE streaming, fire-and-forget message routing, and full pipeline execution. The current prototype uses a local message store that mirrors Band's exact routing logic, with live Band API integration pending OAuth token configuration — a transport-layer switch requiring zero code changes.