GOATnote
In emergency medicine, volume negates luck.
Core trick
Computes reverse triage bed freeing deterministically, and an LLM agent only proposes chart matches for human confirmation.
Description
In emergency medicine, volume negates luck. However no one gets volume in the events that kill but don't happen often. HALO is an open-source ED module for High Acuity, Low Occurrence events, built into the track board nurses already use. When a mass casualty hits: deterministic reverse triage frees beds in milliseconds, one-click AI triage turns a 15-second field note into an evidence-quoted SALT category, a Claude agent reconciles nameless patients against the chart panel (propose-only, human-confirmed), and a second agent audits the log against EMTALA. Plus a simulation lab where rare decisions have consequences — before they have patients. Fail-closed, citation-backed, synthetic data, 275 tests.
README excerpt
<p align="center"> <img src="docs/assets/halo-logo.png" alt="HALO — high acuity, low occurrence events in the ED" width="360"> </p> # HALO > **Maintenance status (2026-09):** passive. This repository is kept available as a reference implementation; CI runs on pushes and pull requests only, Dependabot security alerts remain enabled, and no scheduled jobs or hosted services consume ongoing resources. No active development is planned. [](https://github.com/GOATnote-Inc/HALO/actions/workflows/ci.yml) **HALO — High Acuity, Low Occurrence.** An open-source, evidence-linked EHR module class for the rare, high-stakes events clinicians can't practice daily. Module 1: **Mass Casualty Incident (MCI) triage support** — built live at the *Future of Agentic AI in Healthcare* hackathon (Abridge × Anthropic × Lightspeed), San Francisco, 2026-07-18. **Synthetic data only. Research demonstration — not a medical device.** Full medical, legal, and ethical posture: [docs/GOVERNANCE.md](docs/GOVERNANCE.md). ## The problem When a mass casualty event hits, the EHR fails in the same ways every time — the published after-action record is consistent: - **Las Vegas, Route 91 (2017):** hundreds of penetrating-trauma patients arrived by private vehicle with no EMS tag, no identity, no registration; staff fell back to markers and improvised labels (Menes et al., *Emergency Physicians Monthly*, 2017). - **Boston Ma