test: cover stop contract, execution adapters, checkpointer race and runtime identity

tests/test_invocation_contract.py

@@ -67,20 +67,24 @@ def test_k3_chat_plan_freezes_adapter_compiled_parameters():
         plan.sdk_params["max_completion_tokens"] = 1
 
 
-def test_responses_plan_accepts_native_tools_when_capability_is_enabled():
+@pytest.mark.parametrize("purpose", ["main_agent", "title", "tool_selector", "deepagents_summarizer"])
+@pytest.mark.parametrize("disable_streaming", [True, "tool_calling", False])
+def test_responses_plan_accepts_native_tools_when_capability_is_enabled(purpose, disable_streaming):
     plan = compile_invocation_plan(
         api_mode="responses",
         declared_tool_call_transport="native",
         supports_tools=True,
-        purpose="title",
+        purpose=purpose,
         output_token_limit=1_024,
         reasoning_effort="disabled",
         runtime_provider="openai",
-        sdk_params={"max_output_tokens": 1_024, "use_responses_api": True},
+        sdk_params={"max_output_tokens": 1_024, "use_responses_api": True,
+                    "disable_streaming": disable_streaming, "streaming": False},
     )
 
     assert plan.tool_call_transport == "native"
-    assert plan.streaming is False
+    assert plan.streaming is True
+    assert plan.sdk_params["disable_streaming"] is False
 
 
 def test_plan_rejects_runtime_projection_that_disagrees_with_capabilities():