fix(steering): update integration tests to use plugins parameter

Update all integration tests in tests_integ/steering/ to use
plugins=[handler] instead of hooks=[handler] since SteeringHandler
now implements Plugin protocol instead of HookProvider.

Author: strands-agent

tests_integ/steering/test_model_steering.py

@@ -39,7 +39,7 @@ async def steer_after_model(
 def test_model_steering_proceeds_without_intervention():
     """Test that model steering can accept responses without modification."""
     handler = SimpleModelSteeringHandler(should_guide=False)
-    agent = Agent(hooks=[handler])
+    agent = Agent(plugins=[handler])
 
     response = agent("What is 2+2?")
 
@@ -54,7 +54,7 @@ def test_model_steering_proceeds_without_intervention():
 def test_model_steering_guide_triggers_retry():
     """Test that Guide action triggers model retry."""
     handler = SimpleModelSteeringHandler(should_guide=True, guidance_message="Please provide a more detailed response.")
-    agent = Agent(hooks=[handler])
+    agent = Agent(plugins=[handler])
 
     response = agent("What is the capital of France?")
 
@@ -85,7 +85,7 @@ async def steer_after_model(
             return Proceed(reason="Response is good now")
 
     handler = SpecificGuidanceHandler()
-    agent = Agent(hooks=[handler])
+    agent = Agent(plugins=[handler])
 
     response = agent("What is the capital of France?")
 
@@ -122,7 +122,7 @@ async def steer_after_model(
             return Proceed(reason="Response is good now")
 
     handler = MultiRetryHandler()
-    agent = Agent(hooks=[handler])
+    agent = Agent(plugins=[handler])
 
     response = agent("Explain machine learning.")
 
@@ -195,7 +195,7 @@ async def steer_after_model(
             return Proceed(reason="Guidance was provided")
 
     handler = ForceToolUsageHandler(required_tool="log_activity")
-    agent = Agent(tools=[log_activity], hooks=[handler])
+    agent = Agent(tools=[log_activity], plugins=[handler])
 
     # Ask a question that clearly doesn't need the logging tool
     response = agent("What is 2 + 2?")

tests_integ/steering/test_tool_steering.py

@@ -87,7 +87,7 @@ def test_agent_with_tool_steering_e2e():
         context_providers=[],  # Disable ledger to avoid confusing context
     )
 
-    agent = Agent(tools=[send_email, send_notification], hooks=[handler])
+    agent = Agent(tools=[send_email, send_notification], plugins=[handler])
 
     # This should trigger steering guidance to use send_notification instead
     response = agent("Send an email to john@example.com saying hello")
@@ -132,7 +132,7 @@ async def steer_before_tool(self, *, agent, tool_use, **kwargs):
             return Proceed(reason="Ledger verified")
 
     handler = LedgerCheckingHandler()
-    agent = Agent(tools=[send_notification], hooks=[handler])
+    agent = Agent(tools=[send_notification], plugins=[handler])
 
     agent("Send a notification to alice saying test message")