Python: Fix: Parse oauth_consent_request events in Azure AI client (#4197)

* Fix: Parse oauth_consent_request events in Azure AI client (#3950)

When Azure AI Agent Service returns an oauth_consent_request output item
for OAuth-protected MCP tools, the base OpenAI responses parser drops it
(hits case _ default branch). This causes agent runs to complete silently
with zero content.

Changes:
- Add oauth_consent_request ContentType and Content.from_oauth_consent_request()
  factory with consent_link field and user_input_request=True
- Override _parse_response_from_openai and _parse_chunk_from_openai in
  RawAzureAIClient to intercept Azure-specific oauth_consent_request items
- Add _emit_oauth_consent helper in AG-UI to emit CustomEvent for frontends
- Add tests proving base parser drops the event and Azure AI override catches it

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* addressed comment

* addressed comments

* addressed comments

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/packages/core/agent_framework/_types.py

@@ -345,6 +345,7 @@ ContentType = Literal[
     "shell_command_output",
     "function_approval_request",
     "function_approval_response",
+    "oauth_consent_request",
 ]
 
 
@@ -498,6 +499,8 @@ class Content:
         function_call: Content | None = None,
         user_input_request: bool | None = None,
         approved: bool | None = None,
+        # OAuth consent fields
+        consent_link: str | None = None,
         # Common fields
         annotations: Sequence[Annotation] | None = None,
         additional_properties: MutableMapping[str, Any] | None = None,
@@ -546,6 +549,7 @@ class Content:
         self.function_call = function_call
         self.user_input_request = user_input_request
         self.approved = approved
+        self.consent_link = consent_link
 
     @classmethod
     def from_text(
@@ -1122,6 +1126,37 @@ class Content:
             raw_representation=raw_representation,
         )
 
+    @classmethod
+    def from_oauth_consent_request(
+        cls: type[ContentT],
+        consent_link: str,
+        *,
+        annotations: Sequence[Annotation] | None = None,
+        additional_properties: MutableMapping[str, Any] | None = None,
+        raw_representation: Any = None,
+    ) -> ContentT:
+        """Create OAuth consent request content.
+
+        Args:
+            consent_link: The URL the user must visit to complete OAuth consent.
+
+        Keyword Args:
+            annotations: Optional annotations.
+            additional_properties: Optional additional properties.
+            raw_representation: Optional raw representation from the provider.
+
+        Returns:
+            A new Content instance with type ``oauth_consent_request``.
+        """
+        return cls(
+            "oauth_consent_request",
+            consent_link=consent_link,
+            user_input_request=True,
+            annotations=annotations,
+            additional_properties=additional_properties,
+            raw_representation=raw_representation,
+        )
+
     def to_function_approval_response(
         self,
         approved: bool,
@@ -1176,6 +1211,7 @@ class Content:
             "user_input_request",
             "approved",
             "id",
+            "consent_link",
             "additional_properties",
         )
 

python/packages/core/tests/core/test_types.py

@@ -3424,3 +3424,30 @@ class TestResponseStreamEdgeCases:
 
 
 # endregion
+
+
+# region OAuth Consent Content
+
+
+def test_oauth_consent_request_creation():
+    """Test Content.from_oauth_consent_request creates the correct content."""
+    content = Content.from_oauth_consent_request(
+        consent_link="https://login.microsoftonline.com/common/oauth2/authorize?client_id=abc",
+    )
+    assert content.type == "oauth_consent_request"
+    assert content.consent_link == "https://login.microsoftonline.com/common/oauth2/authorize?client_id=abc"
+    assert content.user_input_request is True
+
+
+def test_oauth_consent_request_serialization_roundtrip():
+    """Test that oauth_consent_request content serializes and includes consent_link."""
+    content = Content.from_oauth_consent_request(
+        consent_link="https://login.microsoftonline.com/consent",
+    )
+    d = content.to_dict()
+    assert d["type"] == "oauth_consent_request"
+    assert d["consent_link"] == "https://login.microsoftonline.com/consent"
+    assert d["user_input_request"] is True
+
+
+# endregion