refactor(agent): dedupe harness and command workflows

src/commands/test-wizard-helpers.ts

@@ -0,0 +1,33 @@
+import { vi } from "vitest";
+import type { RuntimeEnv } from "../runtime.js";
+import type { WizardPrompter } from "../wizard/prompts.js";
+
+export const noopAsync = async () => {};
+export const noop = () => {};
+
+export function createExitThrowingRuntime(): RuntimeEnv {
+  return {
+    log: vi.fn(),
+    error: vi.fn(),
+    exit: vi.fn((code: number) => {
+      throw new Error(`exit:${code}`);
+    }),
+  };
+}
+
+export function createWizardPrompter(
+  overrides: Partial<WizardPrompter>,
+  options?: { defaultSelect?: string },
+): WizardPrompter {
+  return {
+    intro: vi.fn(noopAsync),
+    outro: vi.fn(noopAsync),
+    note: vi.fn(noopAsync),
+    select: vi.fn(async () => (options?.defaultSelect ?? "") as never),
+    multiselect: vi.fn(async () => []),
+    text: vi.fn(async () => "") as unknown as WizardPrompter["text"],
+    confirm: vi.fn(async () => false),
+    progress: vi.fn(() => ({ update: noop, stop: noop })),
+    ...overrides,
+  };
+}