feat(tools): implement universal tool calling and multi-turn resolution for generic Gradio spaces

README.md

@@ -171,7 +171,7 @@ curl -N http://localhost:8080/v1/chat/completions \
   }'
 ```
 
-### Tool calling
+### Tool calling (turn 1)
 
 ```bash
 curl http://localhost:8080/v1/chat/completions \
@@ -233,6 +233,76 @@ Response:
 }
 ```
 
+### Tool response submission (turn 2)
+
+```bash
+curl http://localhost:8080/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "openai/gpt-oss-120b",
+    "messages": [
+      {"role": "user", "content": "What is the weather in Tokyo?"},
+      {
+        "role": "assistant",
+        "tool_calls": [
+          {
+            "id": "call_3d4c016a",
+            "type": "function",
+            "function": {
+              "name": "get_weather",
+              "arguments": "{\"location\":\"Tokyo\"}"
+            }
+          }
+        ]
+      },
+      {
+        "role": "tool",
+        "tool_call_id": "call_3d4c016a",
+        "content": "{\"temperature\": 20, \"condition\": \"sunny\"}"
+      }
+    ],
+    "tools": [{
+      "type": "function",
+      "function": {
+        "name": "get_weather",
+        "description": "Get current weather in a location",
+        "parameters": {
+          "type": "object",
+          "properties": {
+            "location": {"type": "string", "description": "City name"}
+          },
+          "required": ["location"]
+        }
+      }
+    }]
+  }'
+```
+
+Response:
+```json
+{
+  "id": "chatcmpl-4903ba12-f12b-4cd3-a801-7290bc91a421",
+  "object": "chat.completion",
+  "created": 1788756335,
+  "model": "openai/gpt-oss-120b",
+  "choices": [
+    {
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": "The current weather in Tokyo is sunny with a temperature of 20 °C."
+      },
+      "finish_reason": "stop"
+    }
+  ],
+  "usage": {
+    "prompt_tokens": 0,
+    "completion_tokens": 0,
+    "total_tokens": 0
+  }
+}
+```
+
 ### Dynamic target space override
 
 Override the target space per request without restarting the server: