add aden's requested changes

scripts/smoke-test.mjs

@@ -0,0 +1,49 @@
+import fs from "node:fs";
+import path from "node:path";
+
+const root = process.cwd();
+
+function fail(message) {
+  console.error(`[smoke-test] ${message}`);
+  process.exit(1);
+}
+
+function assertManifest(browserDir) {
+  const manifestPath = path.join(root, "dist", browserDir, "manifest.json");
+  if (!fs.existsSync(manifestPath)) {
+    fail(`Missing ${manifestPath} — run npm run build first`);
+  }
+  const manifest = JSON.parse(fs.readFileSync(manifestPath, "utf8"));
+  if (!manifest.manifest_version) fail(`${browserDir} manifest missing manifest_version`);
+  if (!manifest.name) fail(`${browserDir} manifest missing name`);
+  if (!manifest.version) fail(`${browserDir} manifest missing version`);
+
+  const sw =
+    manifest.background?.service_worker ??
+    manifest.background?.scripts?.[0] ??
+    null;
+  if (sw) {
+    const swPath = path.join(root, "dist", browserDir, sw);
+    if (!fs.existsSync(swPath)) {
+      fail(`${browserDir} service worker not found on disk: ${sw}`);
+    }
+  }
+}
+
+function assertAssets(browserDir) {
+  const assetsDir = path.join(root, "dist", browserDir, "assets");
+  if (!fs.existsSync(assetsDir)) {
+    fail(`Missing assets directory: dist/${browserDir}/assets`);
+  }
+  const jsFiles = fs.readdirSync(assetsDir).filter((f) => f.endsWith(".js"));
+  if (jsFiles.length === 0) {
+    fail(`No JS assets in dist/${browserDir}/assets`);
+  }
+}
+
+for (const browser of ["chrome", "firefox"]) {
+  assertManifest(browser);
+  assertAssets(browser);
+}
+
+console.log("[smoke-test] dist/chrome and dist/firefox look OK");