Upload research_fallback.py

backend/research_fallback.py

@@ -6,6 +6,8 @@ circuit breaker is active); never changes retrieval or media analysis.
 from __future__ import annotations
 
 import os
+import json
+import logging
 import threading
 import time
 
@@ -25,6 +27,23 @@ def is_infrastructure_error(exc: Exception) -> bool:
     return any(signal in text for signal in signals)
 
 
+
+def is_gradio_transport_json_error(exc: Exception) -> bool:
+    """Classify only malformed JSON returned while contacting the Llama Space.
+
+    Never treat JSON parsing failures in publication retrieval or our own
+    application data as an infrastructure outage.
+    """
+    if not isinstance(exc, json.JSONDecodeError):
+        return False
+    tb = exc.__traceback__
+    while tb is not None:
+        module = str(tb.tb_frame.f_globals.get("__name__", ""))
+        if module == "gradio_client" or module.startswith("gradio_client."):
+            return True
+        tb = tb.tb_next
+    return False
+
 def llama_circuit_open() -> bool:
     with _LOCK:
         return time.monotonic() < _UNAVAILABLE_UNTIL