fix: auto-create session if not found in /run endpoint

agents/core-logic/app.py

@@ -1,7 +1,5 @@
 # agents/core-logic/app.py
 # OSVauco-NMTMD-GCOS — FastAPI HTTP entrypoint for Cloud Run
-# Wraps the ADK root_agent with a /run endpoint and a /health check.
-# Usage: uvicorn app:app --host 0.0.0.0 --port 8080
 
 import os
 import logging
@@ -14,7 +12,6 @@ from pydantic import BaseModel
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
 
-# ── ADK imports ───────────────────────────────────────────────
 try:
     from google.adk.runners import Runner
     from google.adk.sessions import InMemorySessionService
@@ -24,13 +21,10 @@ except ImportError as e:
     logger.error(f"Failed to import ADK dependencies: {e}")
     raise
 
-# ── Session service (in-memory for stateless Cloud Run) ───────────────
 session_service = InMemorySessionService()
-
 APP_NAME = os.environ.get("CLOUD_RUN_SERVICE", "gcp-orchestrator")
 
 
-# ── Lifespan ───────────────────────────────────────────────────
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     logger.info(f"OSVauco agent '{APP_NAME}' starting up")
@@ -38,7 +32,6 @@ async def lifespan(app: FastAPI):
     logger.info(f"OSVauco agent '{APP_NAME}' shutting down")
 
 
-# ── App ────────────────────────────────────────────────────────
 app = FastAPI(
     title="OSVauco GCP Agent",
     description="ADK-based multi-agent orchestrator on Cloud Run",
@@ -47,7 +40,6 @@ app = FastAPI(
 )
 
 
-# ── Models ─────────────────────────────────────────────────────
 class RunRequest(BaseModel):
     user_id: str
     session_id: str
@@ -60,34 +52,27 @@ class RunResponse(BaseModel):
     response: str
 
 
-# ── Routes ─────────────────────────────────────────────────────
 @app.get("/health")
 async def health():
-    """Cloud Run health check endpoint."""
     return JSONResponse({"status": "ok", "service": APP_NAME})
 
 
 @app.post("/run", response_model=RunResponse)
 async def run(req: RunRequest):
-    """
-    Run the OSVauco ADK agent for a single turn.
-    Creates (or reuses) a session, sends the user message,
-    and returns the final agent response.
-    """
     try:
-        # Create or reuse session
-        try:
-            session = await session_service.get_session(
-                app_name=APP_NAME,
-                user_id=req.user_id,
-                session_id=req.session_id,
-            )
-        except Exception:
-            session = await session_service.create_session(
+        # Always ensure session exists — create if missing
+        session = session_service.get_session(
+            app_name=APP_NAME,
+            user_id=req.user_id,
+            session_id=req.session_id,
+        )
+        if session is None:
+            session = session_service.create_session(
                 app_name=APP_NAME,
                 user_id=req.user_id,
                 session_id=req.session_id,
             )
+            logger.info(f"Created new session: {req.session_id}")
 
         runner = Runner(
             agent=root_agent,
@@ -112,7 +97,7 @@ async def run(req: RunRequest):
                         final_response += part.text
 
         logger.info(
-            f"[{req.user_id}/{req.session_id}] Agent response length: {len(final_response)}"
+            f"[{req.user_id}/{req.session_id}] Response length: {len(final_response)}"
         )
         return RunResponse(
             user_id=req.user_id,