diff --git a/.gitignore b/.gitignore
index d4efdd4..f186cff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 .nova
 .maid
 .cache
+.superset
 
 .claude
 .github/artifacts
diff --git a/include/internal.h b/include/internal.h
index 69bbf76..6465a6e 100644
--- a/include/internal.h
+++ b/include/internal.h
@@ -153,11 +153,6 @@ struct ant_isolate_t {
   void *jit_ctx;
   #endif
   
-  // TODO: should be under sym struct
-  // rename object to object_proto
-  ant_value_t object;
-  ant_value_t array_proto;
-  
   ant_value_t global;
   ant_value_t this_val;
   ant_value_t new_target;
@@ -194,6 +189,8 @@ struct ant_isolate_t {
     uint64_t counter;
     struct sym_registry_entry *registry;
     
+    ant_value_t object_proto;
+    ant_value_t array_proto;
     ant_value_t iterator_proto;
     ant_value_t array_iterator_proto;
     ant_value_t string_iterator_proto;
diff --git a/src/ant.c b/src/ant.c
index 20526c3..f98f442 100644
--- a/src/ant.c
+++ b/src/ant.c
@@ -1411,7 +1411,7 @@ print_plain_object:
     if (pt != T_OBJ && pt != T_FUNC) break;
     
     ant_value_t proto_proto = js_get_proto(js, proto_val);
-    ant_value_t object_proto = js->object;
+    ant_value_t object_proto = js->sym.object_proto;
     proto_is_null_proto = (vtype(proto_proto) == T_NULL) && 
                           (vdata(proto_val) != vdata(object_proto));
     
@@ -2372,7 +2372,7 @@ static ant_value_t alloc_array_with_proto(ant_t *js, ant_value_t proto) {
 }
 
 static inline ant_value_t mkarr(ant_t *js) {
-  return alloc_array_with_proto(js, js->array_proto);
+  return alloc_array_with_proto(js, js->sym.array_proto);
 }
 
 ant_value_t js_mkarr(ant_t *js) { 
@@ -2381,7 +2381,7 @@ ant_value_t js_mkarr(ant_t *js) {
 
 ant_value_t js_newobj(ant_t *js) {
   ant_value_t obj = mkobj(js, 0);
-  ant_value_t proto = js->object;
+  ant_value_t proto = js->sym.object_proto;
   if (vtype(proto) == T_OBJ) js_set_proto_init(obj, proto);
   return obj;
 }
@@ -2660,7 +2660,7 @@ static ant_value_t setup_func_prototype(ant_t *js, ant_value_t func) {
   ant_value_t proto_obj = mkobj(js, 0);
   if (is_err(proto_obj)) return proto_obj;
   
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
   if (vtype(object_proto) == T_OBJ) {
     js_set_proto_init(proto_obj, object_proto);
   }
@@ -3843,8 +3843,8 @@ static inline ant_value_t get_ctor_proto(ant_t *js, const char *name, size_t len
 
 static ant_value_t get_prototype_for_type(ant_t *js, uint8_t type) {
 switch (type) {
-  case T_OBJ:     return js->object;
-  case T_ARR:     return js->array_proto;
+  case T_OBJ:     return js->sym.object_proto;
+  case T_ARR:     return js->sym.array_proto;
   case T_STR:     return get_ctor_proto(js, "String", 6);
   case T_NUM:     return get_ctor_proto(js, "Number", 6);
   case T_BOOL:    return get_ctor_proto(js, "Boolean", 7);
@@ -4601,7 +4601,7 @@ static ant_value_t builtin_Boolean(ant_t *js, ant_value_t *args, int nargs) {
 
 static ant_value_t builtin_Object(ant_t *js, ant_value_t *args, int nargs) {
   if (nargs == 0 || vtype(args[0]) == T_NULL || vtype(args[0]) == T_UNDEF) {
-    ant_value_t obj_proto = js->object;
+    ant_value_t obj_proto = js->sym.object_proto;
     if (is_unboxed_obj(js, js->this_val, obj_proto)) return js->this_val;
     return js_mkobj(js);
   }
@@ -12807,8 +12807,8 @@ ant_t *js_create(void *buf, size_t len) {
   
   set_proto(js, glob, object_proto);
   
-  js->object = object_proto;
-  js->array_proto = array_proto;
+  js->sym.object_proto = object_proto;
+  js->sym.array_proto = array_proto;
   js->owns_mem = false;
   js->max_size = 0;
   
diff --git a/src/gc/objects.c b/src/gc/objects.c
index cff56d4..f2d20d7 100644
--- a/src/gc/objects.c
+++ b/src/gc/objects.c
@@ -452,8 +452,8 @@ static void gc_mark_roots(ant_t *js) {
   for (coroutine_t *c = js->active_async_coro; c; c = c->active_parent) gc_mark_coroutine(js, c);
 
   gc_mark_value(js, js->global);
-  gc_mark_value(js, js->object);
-  gc_mark_value(js, js->array_proto);
+  gc_mark_value(js, js->sym.object_proto);
+  gc_mark_value(js, js->sym.array_proto);
   gc_mark_value(js, js->this_val);
   gc_mark_value(js, js->new_target);
   gc_mark_value(js, js->current_func);
diff --git a/src/modules/bigint.c b/src/modules/bigint.c
index 047ccad..51a7745 100644
--- a/src/modules/bigint.c
+++ b/src/modules/bigint.c
@@ -1470,7 +1470,7 @@ void init_bigint_module(void) {
   ant_t *js = rt->js;
 
   ant_value_t glob = js_glob(js);
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
   ant_value_t function_proto = js_get_slot(glob, SLOT_FUNC_PROTO);
   if (vtype(function_proto) == T_UNDEF) function_proto = js_get_ctor_proto(js, "Function", 8);
 
diff --git a/src/modules/buffer.c b/src/modules/buffer.c
index 5835d41..bfb649e 100644
--- a/src/modules/buffer.c
+++ b/src/modules/buffer.c
@@ -2379,7 +2379,7 @@ void init_buffer_module() {
   ant_t *js = rt->js;
   
   ant_value_t glob = js->global;
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
 
   ant_value_t arraybuffer_ctor_obj = js_mkobj(js);
   ant_value_t arraybuffer_proto = js_mkobj(js);
diff --git a/src/modules/collections.c b/src/modules/collections.c
index 43878c8..7d6d07a 100644
--- a/src/modules/collections.c
+++ b/src/modules/collections.c
@@ -1023,7 +1023,7 @@ void init_collections_module(void) {
   ant_t *js = rt->js;
   
   ant_value_t glob = js->global;
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
   
   ant_value_t iter_sym = get_iterator_sym();
   ant_value_t tag_sym = get_toStringTag_sym();
diff --git a/src/modules/date.c b/src/modules/date.c
index 80ab0c9..8de8a4a 100644
--- a/src/modules/date.c
+++ b/src/modules/date.c
@@ -1287,7 +1287,7 @@ static void date_define_methods(
 void init_date_module(void) {
   ant_t *js = rt->js;
   ant_value_t glob = js->global;
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
   
   ant_value_t function_proto = js_get_ctor_proto(js, "Function", 8);
   ant_value_t date_proto = js_mkobj(js);
diff --git a/src/modules/lmdb.c b/src/modules/lmdb.c
index 693116c..1e92d87 100644
--- a/src/modules/lmdb.c
+++ b/src/modules/lmdb.c
@@ -968,7 +968,7 @@ static ant_value_t lmdb_txn_constructor(ant_t *js, ant_value_t *args, int nargs)
 
 static void ensure_lmdb_prototypes(ant_t *js) {
   if (lmdb_types.ready) return;
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
 
   ant_value_t env_ctor_obj = js_mkobj(js);
   ant_value_t env_proto = js_mkobj(js);
diff --git a/src/modules/math.c b/src/modules/math.c
index 139c476..b3c4748 100644
--- a/src/modules/math.c
+++ b/src/modules/math.c
@@ -278,9 +278,9 @@ void init_math_module(void) {
   ant_t *js = rt->js;
   
   ant_value_t glob = js_glob(js);
-  ant_value_t object_proto = js->object;
   ant_value_t math_obj = mkobj(js, 0);
-  
+  ant_value_t object_proto = js->sym.object_proto;
+
   js_set_proto_init(math_obj, object_proto);
   js_setprop(js, math_obj, js_mkstr(js, "E", 1), tov(M_E));
   js_setprop(js, math_obj, js_mkstr(js, "LN10", 4), tov(M_LN10));
diff --git a/src/modules/regex.c b/src/modules/regex.c
index 5729e12..05bbcca 100644
--- a/src/modules/regex.c
+++ b/src/modules/regex.c
@@ -1853,7 +1853,7 @@ static ant_value_t builtin_string_match(ant_t *js, ant_value_t *args, int nargs)
 void init_regex_module(void) {
   ant_t *js = rt->js;
   ant_value_t glob = js->global;
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
 
   ant_value_t regexp_proto = js_mkobj(js);
   js_set_proto_init(regexp_proto, object_proto);
diff --git a/src/modules/symbol.c b/src/modules/symbol.c
index 80e47cc..2ef8050 100644
--- a/src/modules/symbol.c
+++ b/src/modules/symbol.c
@@ -68,7 +68,7 @@ static ant_value_t get_iterator_prototype(ant_t *js) {
   if (vtype(js->sym.iterator_proto) == T_OBJ) return js->sym.iterator_proto;
 
   js->sym.iterator_proto = js_mkobj(js);
-  js_set_proto_init(js->sym.iterator_proto, js->object);
+  js_set_proto_init(js->sym.iterator_proto, js->sym.object_proto);
   js_set_sym(js, js->sym.iterator_proto, g_iterator, js_mkfun(sym_this_cb));
   
   return js->sym.iterator_proto;
diff --git a/src/modules/wasm.c b/src/modules/wasm.c
index 1246ef0..68fab1a 100644
--- a/src/modules/wasm.c
+++ b/src/modules/wasm.c
@@ -1239,13 +1239,13 @@ void init_wasm_module(void) {
   g_wasm_linkerror_proto = js_mkobj(js);
   g_wasm_runtimeerror_proto = js_mkobj(js);
 
-  js_set_proto_init(g_wasm_module_proto, js->object);
-  js_set_proto_init(g_wasm_instance_proto, js->object);
-  js_set_proto_init(g_wasm_global_proto, js->object);
-  js_set_proto_init(g_wasm_memory_proto, js->object);
-  js_set_proto_init(g_wasm_table_proto, js->object);
-  js_set_proto_init(g_wasm_tag_proto, js->object);
-  js_set_proto_init(g_wasm_exception_proto, js->object);
+  js_set_proto_init(g_wasm_module_proto, js->sym.object_proto);
+  js_set_proto_init(g_wasm_instance_proto, js->sym.object_proto);
+  js_set_proto_init(g_wasm_global_proto, js->sym.object_proto);
+  js_set_proto_init(g_wasm_memory_proto, js->sym.object_proto);
+  js_set_proto_init(g_wasm_table_proto, js->sym.object_proto);
+  js_set_proto_init(g_wasm_tag_proto, js->sym.object_proto);
+  js_set_proto_init(g_wasm_exception_proto, js->sym.object_proto);
 
   js_set_proto_init(g_wasm_compileerror_proto, error_proto);
   js_set_proto_init(g_wasm_linkerror_proto, error_proto);
diff --git a/src/silver/glue.c b/src/silver/glue.c
index 0b02c84..fdf0ed1 100644
--- a/src/silver/glue.c
+++ b/src/silver/glue.c
@@ -390,7 +390,7 @@ ant_value_t jit_helper_put_global(
 
 ant_value_t jit_helper_object(sv_vm_t *vm, ant_t *js) {
   ant_value_t obj = mkobj(js, 0);
-  ant_value_t proto = js->object;
+  ant_value_t proto = js->sym.object_proto;
   if (vtype(proto) == T_OBJ) js_set_proto_init(obj, proto);
   return obj;
 }
diff --git a/src/silver/ops/literals.h b/src/silver/ops/literals.h
index dc79d53..0670773 100644
--- a/src/silver/ops/literals.h
+++ b/src/silver/ops/literals.h
@@ -57,20 +57,20 @@ static inline void sv_op_object(sv_vm_t *vm, ant_t *js, sv_func_t *func, uint8_t
   ant_object_t *ptr = js_obj_ptr(js_as_obj(obj));
   sv_obj_site_cache_t *site = sv_obj_site_for_ip(func, ip);
   if (ptr && ptr->shape && site) {
-    if (site->shared_shape) {
-      if (site->shared_shape != ptr->shape) {
-        ant_shape_retain(site->shared_shape);
-        ant_shape_release(ptr->shape);
-        ptr->shape = site->shared_shape;
-      }
-      uint32_t count = ant_shape_count(ptr->shape);
-      if (count > ptr->prop_count) (void)js_obj_ensure_prop_capacity(ptr, count);
-    } else {
-      site->shared_shape = ptr->shape;
+  if (site->shared_shape) {
+    if (site->shared_shape != ptr->shape) {
       ant_shape_retain(site->shared_shape);
+      ant_shape_release(ptr->shape);
+      ptr->shape = site->shared_shape;
     }
-  }
-  ant_value_t proto = js->object;
+    uint32_t count = ant_shape_count(ptr->shape);
+    if (count > ptr->prop_count) (void)js_obj_ensure_prop_capacity(ptr, count);
+  } else {
+    site->shared_shape = ptr->shape;
+    ant_shape_retain(site->shared_shape);
+  }}
+  
+  ant_value_t proto = js->sym.object_proto;
   if (vtype(proto) == T_OBJ) js_set_proto_init(obj, proto);
   vm->stack[vm->sp++] = obj;
 }
diff --git a/src/silver/ops/upvalues.h b/src/silver/ops/upvalues.h
index aacc6fc..0c8bf4f 100644
--- a/src/silver/ops/upvalues.h
+++ b/src/silver/ops/upvalues.h
@@ -11,7 +11,7 @@ static inline ant_value_t sv_setup_function_prototype(
   ant_value_t proto_obj = mkobj(js, 0);
   if (is_err(proto_obj)) return proto_obj;
 
-  ant_value_t object_proto = js->object;
+  ant_value_t object_proto = js->sym.object_proto;
   if (vtype(object_proto) == T_OBJ) js_set_proto_init(proto_obj, object_proto);
 
   ant_value_t ctor_key = js_mkstr(js, "constructor", 11);