move shim to new package

packages/shim/src/debug.js

@@ -0,0 +1,47 @@
+const DEBUG = true;
+const _accessLog = new Map(); // "module.property" -> count
+
+export function wrapWithProxy(obj, name) {
+  if (!DEBUG || !obj || typeof obj !== "object") {
+    return obj;
+  }
+
+  return new Proxy(obj, {
+    get(target, prop) {
+      if (
+        typeof prop === "string" &&
+        prop !== "then" &&
+        prop !== "toJSON" &&
+        !prop.startsWith("_")
+      ) {
+        const key = `${name}.${prop}`;
+        _accessLog.set(key, (_accessLog.get(key) || 0) + 1);
+
+        if (!(prop in target)) {
+          console.warn(`[shim:MISS] ${key} - property not found on shim`);
+        }
+      }
+
+      return target[prop];
+    },
+  });
+}
+
+export function installDebugHelpers(rawRegistry) {
+  window.__shimLog = function () {
+    const sorted = [..._accessLog.entries()].sort((a, b) => b[1] - a[1]);
+    console.table(sorted.map(([k, v]) => ({ api: k, calls: v })));
+  };
+
+  window.__shimMisses = function () {
+    const sorted = [..._accessLog.entries()]
+      .filter(([k]) => {
+        const [mod, prop] = k.split(".");
+        const shim = rawRegistry[mod];
+        return shim && !(prop in shim);
+      })
+      .sort((a, b) => b[1] - a[1]);
+
+    console.table(sorted.map(([k, v]) => ({ api: k, calls: v })));
+  };
+}