refactor(agent): dedupe harness and command workflows

src/agents/sessions-spawn-threadid.e2e.test.ts

@@ -1,28 +1,10 @@
-import { beforeEach, describe, expect, it, vi } from "vitest";
-
-const callGatewayMock = vi.fn();
-vi.mock("../gateway/call.js", () => ({
-  callGateway: (opts: unknown) => callGatewayMock(opts),
-}));
-
-let configOverride: ReturnType<(typeof import("../config/config.js"))["loadConfig"]> = {
-  session: {
-    mainKey: "main",
-    scope: "per-sender",
-  },
-};
-
-vi.mock("../config/config.js", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("../config/config.js")>();
-  return {
-    ...actual,
-    loadConfig: () => configOverride,
-    resolveGatewayPort: () => 18789,
-  };
-});
-
-import "./test-helpers/fast-core-tools.js";
+import { beforeEach, describe, expect, it } from "vitest";
 import { createOpenClawTools } from "./openclaw-tools.js";
+import "./test-helpers/fast-core-tools.js";
+import {
+  callGatewayMock,
+  setSubagentsConfigOverride,
+} from "./openclaw-tools.subagents.test-harness.js";
 import {
   listSubagentRunsForRequester,
   resetSubagentRegistryForTests,
@@ -32,12 +14,12 @@ describe("sessions_spawn requesterOrigin threading", () => {
   beforeEach(() => {
     resetSubagentRegistryForTests();
     callGatewayMock.mockReset();
-    configOverride = {
+    setSubagentsConfigOverride({
       session: {
         mainKey: "main",
         scope: "per-sender",
       },
-    };
+    });
 
     callGatewayMock.mockImplementation(async (opts: unknown) => {
       const req = opts as { method?: string };