[codex] Restore parse model serialization

agentops/helpers/serialization.py

@@ -87,24 +87,41 @@ def model_to_dict(obj: Any) -> dict:
     Returns:
         Dictionary representation of the object, or empty dict if conversion fails
     """
-    if obj is None:
-        return {}
-    if isinstance(obj, dict):
-        return obj
-    if hasattr(obj, "model_dump"):  # Pydantic v2
-        return obj.model_dump()
-    elif hasattr(obj, "dict"):  # Pydantic v1
-        return obj.dict()
-    # TODO this is causing recursion on nested objects.
-    # elif hasattr(obj, "parse"):  # Raw API response
-    #     return model_to_dict(obj.parse())
-    else:
+    def _object_dict(value: Any) -> dict:
         # Try to use __dict__ as fallback
         try:
-            return obj.__dict__
+            return value.__dict__
         except:
             return {}
 
+    def _model_to_dict(value: Any, seen: set[int]) -> dict:
+        if value is None:
+            return {}
+        if isinstance(value, dict):
+            return value
+
+        value_id = id(value)
+        if value_id in seen:
+            return {}
+        seen.add(value_id)
+
+        if hasattr(value, "model_dump"):  # Pydantic v2
+            return value.model_dump()
+        elif hasattr(value, "dict"):  # Pydantic v1
+            return value.dict()
+        elif hasattr(value, "parse"):  # Raw API response
+            try:
+                parsed = value.parse()
+            except Exception:
+                return _object_dict(value)
+            if parsed is value:
+                return _object_dict(value)
+            return _model_to_dict(parsed, seen)
+        else:
+            return _object_dict(value)
+
+    return _model_to_dict(obj, set())
+
 
 def safe_serialize(obj: Any) -> Any:
     """Safely serialize an object to JSON-compatible format

tests/unit/test_serialization.py

@@ -283,8 +283,10 @@ def test_pydantic_models(self):
         v2_result = safe_serialize(v2_model)
         assert json.loads(v2_result) == {"name": "test", "value": 42}
 
-        # Note: parse() method is currently not implemented due to recursion issues
-        # See TODO in serialization.py
+        # Model with parse() method
+        parse_model = ModelWithParse({"name": "test", "value": 42})
+        parse_result = safe_serialize(parse_model)
+        assert json.loads(parse_result) == {"name": "test", "value": 42}
 
     def test_special_types(self):
         """Test serialization of special types using AgentOpsJSONEncoder."""
@@ -406,12 +408,32 @@ def test_pydantic_models(self):
         v2_model = PydanticV2Model(name="test", value=42)
         assert model_to_dict(v2_model) == {"name": "test", "value": 42}
 
-    @pytest.mark.skip(reason="parse() method handling is currently commented out in the implementation")
     def test_parse_method(self):
         """Test models with parse method."""
         parse_model = ModelWithParse({"name": "test", "value": 42})
         assert model_to_dict(parse_model) == {"name": "test", "value": 42}
 
+    def test_parse_method_self_reference(self):
+        """Test parse methods that return themselves do not recurse indefinitely."""
+
+        class SelfParsingModel:
+            def parse(self):
+                return self
+
+        assert model_to_dict(SelfParsingModel()) == {}
+
+    def test_parse_method_exception_uses_dict_fallback(self):
+        """Test parse failures still use the existing __dict__ fallback."""
+
+        class FailingParseModel:
+            def __init__(self):
+                self.value = "fallback"
+
+            def parse(self):
+                raise ValueError("parse failed")
+
+        assert model_to_dict(FailingParseModel()) == {"value": "fallback"}
+
     def test_dict_fallback(self):
         """Test fallback to __dict__."""
         simple_model = SimpleModel("test value")