diff --git a/README.md b/README.md
index 5c18f9e..d52701c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
 <p align="center">
+
+> **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.
+
   <img src="docs/assets/halo-logo.png" alt="HALO — high acuity, low occurrence events in the ED" width="360">
 </p>