feat(a2a): support passing additional keyword arguments to FastAPI and Starlette constructors

src/strands/multiagent/a2a/server.py

@@ -176,16 +176,21 @@ def agent_skills(self, skills: list[AgentSkill]) -> None:
         """
         self._agent_skills = skills
 
-    def to_starlette_app(self) -> Starlette:
+    def to_starlette_app(self, *, app_kwargs: dict[str, Any] | None = None) -> Starlette:
         """Create a Starlette application for serving this agent via HTTP.
 
         Automatically handles path-based mounting if a mount path was derived
         from the http_url parameter.
 
+        Args:
+            app_kwargs: Additional keyword arguments to pass to the Starlette constructor.
+
         Returns:
             Starlette: A Starlette application configured to serve this agent.
         """
-        a2a_app = A2AStarletteApplication(agent_card=self.public_agent_card, http_handler=self.request_handler).build()
+        a2a_app = A2AStarletteApplication(agent_card=self.public_agent_card, http_handler=self.request_handler).build(
+            **app_kwargs or {}
+        )
 
         if self.mount_path:
             # Create parent app and mount the A2A app at the specified path
@@ -196,16 +201,21 @@ def to_starlette_app(self) -> Starlette:
 
         return a2a_app
 
-    def to_fastapi_app(self) -> FastAPI:
+    def to_fastapi_app(self, *, app_kwargs: dict[str, Any] | None = None) -> FastAPI:
         """Create a FastAPI application for serving this agent via HTTP.
 
         Automatically handles path-based mounting if a mount path was derived
         from the http_url parameter.
 
+        Args:
+            app_kwargs: Additional keyword arguments to pass to the FastAPI constructor.
+
         Returns:
             FastAPI: A FastAPI application configured to serve this agent.
         """
-        a2a_app = A2AFastAPIApplication(agent_card=self.public_agent_card, http_handler=self.request_handler).build()
+        a2a_app = A2AFastAPIApplication(agent_card=self.public_agent_card, http_handler=self.request_handler).build(
+            **app_kwargs or {}
+        )
 
         if self.mount_path:
             # Create parent app and mount the A2A app at the specified path

tests/strands/multiagent/a2a/test_server.py

@@ -852,3 +852,27 @@ def test_serve_at_root_edge_cases(mock_strands_agent):
     )
     assert server3.mount_path == ""
     assert server3.http_url == "http://api.example.com/v1/agents/team1/agent1/"
+
+
+def test_to_starlette_app_with_app_kwargs(mock_strands_agent):
+    """Test that to_starlette_app passes app_kwargs to the Starlette constructor."""
+    mock_strands_agent.tool_registry.get_all_tools_config.return_value = {}
+
+    a2a_agent = A2AServer(mock_strands_agent, skills=[])
+
+    app = a2a_agent.to_starlette_app(app_kwargs={"debug": True})
+
+    assert isinstance(app, Starlette)
+    assert app.debug is True
+
+
+def test_to_fastapi_app_with_app_kwargs(mock_strands_agent):
+    """Test that to_fastapi_app passes app_kwargs to the FastAPI constructor."""
+    mock_strands_agent.tool_registry.get_all_tools_config.return_value = {}
+
+    a2a_agent = A2AServer(mock_strands_agent, skills=[])
+
+    app = a2a_agent.to_fastapi_app(app_kwargs={"title": "Custom Agent Title"})
+
+    assert isinstance(app, FastAPI)
+    assert app.title == "Custom Agent Title"