Add endpoints for model listing and legacy model retrieval

agent_api/main.py

@@ -43,6 +43,25 @@ def chat(req: ChatRequest):
         "session_id": req.session_id
     }
 
+
+@app.get("/v1/models")
+def list_models():
+    return {
+        "object": "list",
+        "data": [
+            {
+                "id": "agent-model",
+                "object": "model",
+                "created": 0,
+                "owned_by": "local-agent"
+            }
+        ]
+    }
+
+@app.get("/models")
+def legacy_models():
+    return list_models()
+
 @app.post("/v1/chat/completions")
 def chat_completions(req: dict):
     messages = req["messages"]