diff --git a/backend/routers/prompts.py b/backend/routers/prompts.py
index 4904f01..a00c801 100644
--- a/backend/routers/prompts.py
+++ b/backend/routers/prompts.py
@@ -1466,7 +1466,9 @@ async def execute_unified_prompt_stream(
     Use this endpoint for long-running workflows (>30s) to avoid gateway timeouts.
     """
     # Manual auth: verify token and get profile_id
+    logger.info(f"execute-stream: Received token: {token[:20] if token else 'None'}...")
     if not token:
+        logger.error("execute-stream: Missing auth token")
         raise HTTPException(401, "Missing auth token")
 
     with get_db() as conn:
@@ -1474,8 +1476,10 @@ async def execute_unified_prompt_stream(
         cur.execute("SELECT profile_id FROM sessions WHERE token = %s", (token,))
         row = cur.fetchone()
         if not row:
+            logger.error(f"execute-stream: Invalid token: {token[:20]}...")
             raise HTTPException(401, "Invalid or expired token")
         profile_id = row['profile_id']
+        logger.info(f"execute-stream: Auth successful for profile {profile_id}")
 
     # Use default modules/timeframes if not provided
     if not modules: