Initial commit of integrated agent system

backend/runtime/registry.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from typing import Dict, Optional
+
+
+class RuntimeRegistry:
+    def __init__(self) -> None:
+        self._states: Dict[str, "AgentRuntimeState"] = {}
+
+    def register(self, agent_id: str, state: "AgentRuntimeState") -> None:
+        self._states[agent_id] = state
+
+    def get(self, agent_id: str) -> Optional["AgentRuntimeState"]:
+        return self._states.get(agent_id)
+
+    def list_agents(self) -> list[str]:
+        return list(self._states.keys())
+
+    def clear(self) -> None:
+        self._states.clear()