Fix issue #2647: Make planning LLM inherit authentication parameters from agent's LLM

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/utilities/test_planning_auth/test_planning_auth_inheritance.py

@@ -0,0 +1,39 @@
+from crewai import Agent, Task
+from crewai.llm import LLM
+from crewai.utilities.planning_handler import CrewPlanner
+
+def test_planning_llm_inherits_auth_params():
+    """Test that planning LLM inherits authentication parameters from agent LLM."""
+    custom_llm = LLM(
+        model="custom-model",
+        base_url="https://api.custom-provider.com/v1",
+        api_key="fake-api-key",
+        api_version="2023-05-15",
+        organization="custom-org"
+    )
+    
+    agent = Agent(
+        role="Test Agent",
+        goal="Test Goal",
+        backstory="Test Backstory",
+        llm=custom_llm
+    )
+    
+    task = Task(
+        description="Test Task",
+        expected_output="Test Output",
+        agent=agent
+    )
+    
+    planner = CrewPlanner(
+        tasks=[task],
+        planning_agent_llm=None,  # This should trigger the inheritance logic
+        agent_llm=custom_llm
+    )
+    
+    assert hasattr(planner, 'planning_agent_llm')
+    assert hasattr(planner.planning_agent_llm, 'base_url')
+    assert planner.planning_agent_llm.base_url == "https://api.custom-provider.com/v1"
+    assert planner.planning_agent_llm.api_key == "fake-api-key"
+    assert planner.planning_agent_llm.api_version == "2023-05-15"
+    # organization is not directly accessible as an attribute