fix(coding-agent): skip first-time setup for forks (#5627)

packages/coding-agent/test/first-time-setup-fork.test.ts

@@ -0,0 +1,39 @@
+import { mkdtempSync, rmSync } from "fs";
+import { tmpdir } from "os";
+import { join } from "path";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+vi.mock("../src/config.ts", async (importOriginal) => {
+	const actual = await importOriginal();
+	return {
+		...(actual as Record<string, unknown>),
+		PACKAGE_NAME: "@example/pi-coding-agent",
+	};
+});
+
+import { shouldRunFirstTimeSetup } from "../src/cli/startup-ui.ts";
+
+describe("shouldRunFirstTimeSetup in forked distributions", () => {
+	const originalPiExperimental = process.env.PI_EXPERIMENTAL;
+	let tempDir: string;
+	let settingsPath: string;
+
+	beforeEach(() => {
+		tempDir = mkdtempSync(join(tmpdir(), "pi-first-time-setup-fork-"));
+		settingsPath = join(tempDir, "settings.json");
+		process.env.PI_EXPERIMENTAL = "1";
+	});
+
+	afterEach(() => {
+		rmSync(tempDir, { recursive: true, force: true });
+		if (originalPiExperimental === undefined) {
+			delete process.env.PI_EXPERIMENTAL;
+		} else {
+			process.env.PI_EXPERIMENTAL = originalPiExperimental;
+		}
+	});
+
+	it("returns false for a forked package", () => {
+		expect(shouldRunFirstTimeSetup(settingsPath)).toBe(false);
+	});
+});