Add test-options.js script for reporting global variables and content types

config-sub-converter/scripts/test-options.js

@@ -0,0 +1,46 @@
+function safeStringify(obj) {
+  const seen = new WeakSet();
+  return JSON.stringify(
+    obj,
+    (k, v) => {
+      if (typeof v === "object" && v !== null) {
+        if (seen.has(v)) return "[Circular]";
+        seen.add(v);
+      }
+      if (typeof v === "function") return `[Function: ${v.name || "anonymous"}]`;
+      if (typeof v === "bigint") return v.toString();
+      return v;
+    },
+    2
+  );
+}
+
+function globalKeysSample(limit = 200) {
+  try {
+    const keys = Object.getOwnPropertyNames(globalThis).sort();
+    return keys.slice(0, limit);
+  } catch {
+    return [];
+  }
+}
+
+const report = {
+  types: {
+    $content: typeof $content,
+    $files: typeof $files,
+    $options: typeof $options,
+    ProxyUtils: typeof ProxyUtils,
+    produceArtifact: typeof produceArtifact,
+  },
+  values: {
+    $contentPreview: (typeof $content === "string" ? $content.slice(0, 300) : $content),
+    $contentLength: (typeof $content === "string" ? $content.length : null),
+    $files: $files ?? null,
+    $options: $options ?? null,
+  },
+  globals: {
+    globalThisKeysSample: globalKeysSample(),
+  }
+};
+
+$content = safeStringify(report);