Stateless mode: in-memory sessions, delete per request; README: document stateless behavior

README.md

@@ -31,4 +31,9 @@ curl -s -X POST http://localhost:8000/process_data \
 ```
 Returns `{ "emails": "..." }`.
 
+### Stateless mode
+- Sessions are ephemeral and in-memory only; no SQLite persistence.
+- Each request creates a new session and it is deleted after completion.
+- Web UI works, but conversation history resets on refresh/restart.
+
 

main.py

@@ -37,7 +37,8 @@ if os.getenv("GEMINI_API_KEY") and not os.getenv("GOOGLE_GENAI_API_KEY"):
     os.environ["GOOGLE_GENAI_API_KEY"] = os.getenv("GEMINI_API_KEY")
 
 AGENTS_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), "agents")
-SESSION_SERVICE_URI = "sqlite:///./sessions.db"
+# Stateless: use in-memory session service (no SQLite persistence)
+SESSION_SERVICE_URI = None
 ALLOWED_ORIGINS = ["*"]
 SERVE_WEB_INTERFACE = True
 
@@ -62,14 +63,25 @@ def process_data(data: dict = Body(...)):
     )
 
     final_text = None
+    try:
         for event in _api_runner.run(user_id="api-user", session_id=session.id, new_message=content):
             if getattr(event, "content", None):
                 for part in event.content.parts or []:
                     text = getattr(part, "text", None)
                     if text:
                         final_text = text
-
         return {"emails": final_text or ""}
+    finally:
+        # Ephemeral: delete session after each request
+        try:
+            _api_runner.session_service.delete_session_sync(
+                app_name=_api_runner.app_name,
+                user_id="api-user",
+                session_id=session.id,
+            )
+        except Exception:
+            # Best-effort cleanup
+            pass
 
 
 if __name__ == "__main__":