readFileSync is imported, not assumed

https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx

test/integration/built-store-cross-node.test.ts

@@ -26,7 +26,7 @@
  */
 import { test, before, after } from "node:test";
 import assert from "node:assert/strict";
-import { existsSync } from "node:fs";
+import { existsSync, readFileSync } from "node:fs";
 import { resolve } from "node:path";
 import { loadScenario } from "../../src/declaration/parse.ts";
 import { raise } from "../../src/lifecycle/raise.ts";