test(integration): consolidate isolated host process scenarios

test/helpers/onboard-child-runtime.cjs

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+function installPromptQueue(target, configuredAnswers) {
+  const answers = [...configuredAnswers];
+  const messages = [];
+  const prompts = [];
+  target.prompt = async (message, options = {}) => {
+    messages.push(message);
+    prompts.push({ message, secret: options.secret === true });
+    return answers.shift() ?? "";
+  };
+  return { answers, messages, prompts };
+}
+
+async function captureChildConsole(run) {
+  const originalLog = console.log;
+  const originalError = console.error;
+  const lines = [];
+  console.log = (...args) => lines.push(args.join(" "));
+  console.error = (...args) => lines.push(args.join(" "));
+  try {
+    return { value: await run(), lines };
+  } finally {
+    console.log = originalLog;
+    console.error = originalError;
+  }
+}
+
+function reportChildScenario(run) {
+  const hostLog = console.log;
+  captureChildConsole(run)
+    .then(({ value, lines }) => hostLog(JSON.stringify({ ...value, lines })))
+    .catch((error) => {
+      console.error(error instanceof Error ? error.stack : String(error));
+      process.exitCode = 1;
+    });
+}
+
+module.exports = { installPromptQueue, reportChildScenario };

test/onboard-selection.test.ts

@@ -684,7 +684,7 @@ type CredentialBackPayload = {
 let credentialBackBatchResults: Map<string, CredentialBackPayload> | undefined;
 
 function runCredentialBackScenarioBatch(): Map<string, CredentialBackPayload> {
-  const workspace = createOnboardProcessWorkspace("nemoclaw-onboard-credential-back-batch-");
+  const workspace = onboardProcessWorkspace("nemoclaw-onboard-credential-back-batch-");
   const { root: tmpDir } = workspace;
   const fakeBin = workspace.binDir;
   const agentDefsPath = JSON.stringify(path.join(repoRoot, "src", "lib", "agent", "defs.ts"));