F2: delegate prompt tasks to native Reasoner or OpenCode backends

backend/tests/test_opencode_tasks.py

@@ -32,7 +32,11 @@ class OpenCodeTaskTest(unittest.IsolatedAsyncioTestCase):
                 return httpx.Response(200, text="".join("data: " + json.dumps(e) + "\n\n" for e in events))
             if request.url.path.endswith("prompt_async"):
                 self.assertFalse(submitted)
-                self.assertEqual(json.loads(request.content)["messageID"], "msg_test")
+                payload = json.loads(request.content)
+                self.assertEqual(payload["messageID"], "msg_test")
+                self.assertEqual(payload["agent"], "build")
+                self.assertEqual(payload["model"], {"providerID": "test-provider", "modelID": "test-model"})
+                self.assertEqual(payload["system"], "通用说明\n\n项目 demo")
                 submitted = True
                 return httpx.Response(204)
             if request.url.path.endswith("/message"):
@@ -42,7 +46,10 @@ class OpenCodeTaskTest(unittest.IsolatedAsyncioTestCase):
             if request.url.path == "/session/status":
                 return httpx.Response(200, json={})
             raise AssertionError(request.url)
-        executor = OpenCodeExecutor({"url": "https://remote.test", "directory": "/workspace/demo"}, {}, transport=httpx.MockTransport(respond))
+        executor = OpenCodeExecutor({"url": "https://remote.test", "directory": "/workspace/demo", "agent": "build",
+                                     "model_provider_id": "test-provider", "model_id": "test-model",
+                                     "instructions": "通用说明", "_backend": {"instructions": "项目 {{project}}"},
+                                     "_variables": {"project": "demo"}}, {}, transport=httpx.MockTransport(respond))
         async def emit(event):
             updates.append(event)
         result = await executor.run(handle, "修复测试", emit)