diff --git a/docker-compose.yml b/docker-compose.yml
index 40c7bc9..6bdb92e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,6 +3,9 @@ services:
     build: .
     container_name: orchestrator
     restart: unless-stopped
+    # init: true injects docker-init (tini) as PID 1 so reparented grandchild
+    # processes from the claude/node subprocess tree are reaped (no zombies, B-2).
+    init: true
     network_mode: host
     volumes:
       - ./data:/app/data