diff --git a/el-compiler/runtime/el_runtime.js b/el-compiler/runtime/el_runtime.js
index 88a16e1..a223fdb 100644
--- a/el-compiler/runtime/el_runtime.js
+++ b/el-compiler/runtime/el_runtime.js
@@ -766,6 +766,68 @@ function window_get(name) {
     return null;
 }
 
+// ── Promise helpers ────────────────────────────────────────────────────────
+//
+// Third-party APIs often return Promises but are not El @async functions.
+// These helpers let El programs chain .then / .catch without needing
+// native_js, and without requiring the callee to be @async.
+
+function promise_then(p, cb) {
+    return Promise.resolve(p).then(cb);
+}
+
+function promise_catch(p, cb) {
+    return Promise.resolve(p).catch(cb);
+}
+
+function promise_resolve(val) {
+    return Promise.resolve(val);
+}
+
+function promise_reject(msg) {
+    return Promise.reject(new Error(String(msg)));
+}
+
+// ── Object / Array utilities ───────────────────────────────────────────────
+//
+// Structural operations on Any-typed JS values. These complement the
+// El map/list primitives for interop with third-party library objects.
+
+function object_assign(target, source) {
+    return Object.assign(Object.assign({}, target), source);
+}
+
+function object_keys(obj) {
+    if (obj === null || obj === undefined) return [];
+    return Object.keys(obj);
+}
+
+function object_values(obj) {
+    if (obj === null || obj === undefined) return [];
+    return Object.values(obj);
+}
+
+function json_deep_clone(obj) {
+    if (obj === null || obj === undefined) return null;
+    return JSON.parse(JSON.stringify(obj));
+}
+
+function array_from(iterable) {
+    if (iterable === null || iterable === undefined) return [];
+    return Array.from(iterable);
+}
+
+function type_of(val) {
+    return typeof val;
+}
+
+function instanceof_check(val, constructor_name) {
+    if (typeof globalThis[constructor_name] === 'function') {
+        return val instanceof globalThis[constructor_name];
+    }
+    return false;
+}
+
 // ── native_js escape hatch ─────────────────────────────────────────────────
 //
 // Evaluate arbitrary JS from El source. Intended for calling third-party
@@ -910,6 +972,11 @@ const __el = {
     console_log,
     // Window export helpers
     window_set, window_get,
+    // Promise helpers
+    promise_then, promise_catch, promise_resolve, promise_reject,
+    // Object / Array utilities
+    object_assign, object_keys, object_values, json_deep_clone,
+    array_from, type_of, instanceof_check,
     // native_js escape hatch
     native_js, native_js_call,
     // CGI / DHARMA / Engram / LLM (stubs)
@@ -974,4 +1041,9 @@ export {
     console_log,
     // Window / native_js
     window_set, window_get, native_js, native_js_call,
+    // Promise helpers
+    promise_then, promise_catch, promise_resolve, promise_reject,
+    // Object / Array utilities
+    object_assign, object_keys, object_values, json_deep_clone,
+    array_from, type_of, instanceof_check,
 };
diff --git a/el-compiler/src/codegen-js.el b/el-compiler/src/codegen-js.el
index 7717eaa..f0de87a 100644
--- a/el-compiler/src/codegen-js.el
+++ b/el-compiler/src/codegen-js.el
@@ -1105,6 +1105,9 @@ fn codegen_js_inner(stmts: [Map<String, Any>], source: String, bundle_mode: Bool
         js_emit_line("  window_location, window_redirect, window_on_load,")
         js_emit_line("  console_log,")
         js_emit_line("  window_set, window_get, native_js, native_js_call,")
+        js_emit_line("  promise_then, promise_catch, promise_resolve, promise_reject,")
+        js_emit_line("  object_assign, object_keys, object_values, json_deep_clone,")
+        js_emit_line("  array_from, type_of, instanceof_check,")
         js_emit_line("} = globalThis.__el;")
         js_emit_blank()
     }