refactor: clean up agent architecture and coordination loop

Squash merged refactoring of agent architecture.

core/factory.py

@@ -9,6 +9,8 @@ from core.interfaces import (
 )
 from core.coding_agent import CodingAgent
 from core.agent import CavemanAgent
+from core.coordinator_agent import CoordinatorAgent
+from core.planning_agent import PlanningAgent
 from gitea.workspace import WorkspaceManager
 
 logger: logging.Logger = logging.getLogger("core-factory")
@@ -65,6 +67,16 @@ class AgentFactory:
         logger.info(f"Factory creating CavemanAgent with model: {model_name}")
         return CavemanAgent(model_name)
 
+    @staticmethod
+    def create_coordinator_agent(model_name: str) -> CoordinatorAgent:
+        logger.info(f"Factory creating CoordinatorAgent with model: {model_name}")
+        return CoordinatorAgent(model_name)
+
+    @staticmethod
+    def create_planning_agent(model_name: str) -> PlanningAgent:
+        logger.info(f"Factory creating PlanningAgent with model: {model_name}")
+        return PlanningAgent(model_name)
+
 
 class WorkspaceFactory:
     """Factory for creating workspace manager instances."""