Claude Code: Clarify _session_push_count module-level initialization pattern

app.py

@@ -129,6 +129,7 @@ async def status():
 
 # Office Agent Push endpoints - track agents pushing their status to Cain
 # Module-level initialization ensures variables exist before first request
+# This is the correct pattern for FastAPI - globals initialized once at module import
 _session_push_count = 0
 _registered_agents = {}