fix(a2a): stop to_a2a from overriding the application's log level

src/google/adk/a2a/utils/agent_to_a2a.py

@@ -178,9 +178,7 @@ async def lifespan(app):
 
       app = to_a2a(agent, task_store=task_store, lifespan=lifespan)
   """
-  # Set up ADK logging to ensure logs are visible when using uvicorn directly
   adk_logger = logging.getLogger("google_adk")
-  adk_logger.setLevel(logging.INFO)
 
   def create_runner() -> Runner:
     """Create a runner for the agent or workflow."""

tests/unittests/a2a/utils/test_agent_to_a2a.py

@@ -656,6 +656,13 @@ def test_to_a2a_returns_starlette_app(
 
     assert result == mock_app
 
+  def test_to_a2a_keeps_configured_adk_log_level(self, caplog):
+    """to_a2a leaves the application's "google_adk" logger level unchanged."""
+    with caplog.at_level(logging.WARNING, logger="google_adk"):
+      to_a2a(self.mock_agent)
+
+      assert logging.getLogger("google_adk").level == logging.WARNING
+
   # ---------------------------------------------------------------------------
   # Behavioral hosting checks (real Starlette; drive lifespan; assert routes).
   # ---------------------------------------------------------------------------