diff --git a/lib/ruby_wasm/build/product/crossruby.rb b/lib/ruby_wasm/build/product/crossruby.rb
index 3671faefb5..e6dd12d3a6 100644
--- a/lib/ruby_wasm/build/product/crossruby.rb
+++ b/lib/ruby_wasm/build/product/crossruby.rb
@@ -5,11 +5,12 @@ module RubyWasm
   class CrossRubyExtProduct < BuildProduct
     attr_reader :name
 
-    def initialize(srcdir, toolchain, ext_relative_path: nil)
+    def initialize(srcdir, toolchain, features:, ext_relative_path: nil)
       @srcdir, @toolchain = srcdir, toolchain
       # ext_relative_path is relative path from build dir
       # e.g. cgi-0.3.6/ext/cgi/escape
       @ext_relative_path = ext_relative_path || File.basename(srcdir)
+      @features = features
       @name = @ext_relative_path
     end
 
@@ -76,6 +77,7 @@ def do_extconf(executor, crossruby)
         "#{@srcdir}/extconf.rb",
         "--target-rbconfig=#{rbconfig_rb}",
       ]
+      extconf_args << "--enable-component-model" if @features.support_component_model?
       executor.system Gem.ruby, *extconf_args
     end
 
@@ -105,8 +107,10 @@ def do_legacy_extconf(executor, crossruby)
         # like "cgi/escape" instead of "escape"
         "-e",
         %Q(require "json"; File.write("#{metadata_json(crossruby)}", JSON.dump({target: $target}))),
-        "-I#{crossruby.build_dir}"
+        "-I#{crossruby.build_dir}",
+        "--",
       ]
+      extconf_args << "--enable-component-model" if @features.support_component_model?
       # Clear RUBYOPT to avoid loading unrelated bundle setup
       executor.system crossruby.baseruby_path,
                       *extconf_args,
diff --git a/lib/ruby_wasm/build/toolchain/wit_bindgen.rb b/lib/ruby_wasm/build/toolchain/wit_bindgen.rb
index e444af6fa1..74b1fccc97 100644
--- a/lib/ruby_wasm/build/toolchain/wit_bindgen.rb
+++ b/lib/ruby_wasm/build/toolchain/wit_bindgen.rb
@@ -4,10 +4,10 @@ class WitBindgen
 
     def initialize(
       build_dir:,
-      revision: "251e84b89121751f79ac268629e9285082b2596d"
+      revision: "v0.24.0"
     )
       @build_dir = build_dir
-      @tool_dir = File.join(@build_dir, "toolchain", "wit-bindgen")
+      @tool_dir = File.join(@build_dir, "toolchain", "wit-bindgen-#{revision}")
       @bin_path = File.join(@tool_dir, "bin", "wit-bindgen")
       @revision = revision
     end
diff --git a/lib/ruby_wasm/packager/core.rb b/lib/ruby_wasm/packager/core.rb
index 2fe65388b6..3ff713360a 100644
--- a/lib/ruby_wasm/packager/core.rb
+++ b/lib/ruby_wasm/packager/core.rb
@@ -162,6 +162,7 @@ def build_exts(executor, build)
           RubyWasm::CrossRubyExtProduct.new(
             ext_srcdir,
             build.toolchain,
+            features: @packager.features,
             ext_relative_path: ext_relative_path
           )
         end
@@ -323,6 +324,7 @@ def user_exts(build)
             RubyWasm::CrossRubyExtProduct.new(
               ext_srcdir,
               build.toolchain,
+              features: @packager.features,
               ext_relative_path: ext_relative_path
             )
           end
diff --git a/packages/gems/js/ext/js/bindgen/ext.c b/packages/gems/js/ext/js/bindgen/ext.c
new file mode 100644
index 0000000000..2c05b5f5f3
--- /dev/null
+++ b/packages/gems/js/ext/js/bindgen/ext.c
@@ -0,0 +1,566 @@
+// Generated by `wit-bindgen` 0.24.0. DO NOT EDIT!
+#include "ext.h"
+#include <stdlib.h>
+#include <string.h>
+
+// Imported Functions from `ruby:js/js-runtime`
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("eval-js")))
+extern void __wasm_import_ruby_js_js_runtime_eval_js(uint8_t *, size_t, uint8_t *);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("is-js")))
+extern int32_t __wasm_import_ruby_js_js_runtime_is_js(int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("instance-of")))
+extern int32_t __wasm_import_ruby_js_js_runtime_instance_of(int32_t, int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("global-this")))
+extern int32_t __wasm_import_ruby_js_js_runtime_global_this(void);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("int-to-js-number")))
+extern int32_t __wasm_import_ruby_js_js_runtime_int_to_js_number(int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("float-to-js-number")))
+extern int32_t __wasm_import_ruby_js_js_runtime_float_to_js_number(double);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("string-to-js-string")))
+extern int32_t __wasm_import_ruby_js_js_runtime_string_to_js_string(uint8_t *, size_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("bool-to-js-bool")))
+extern int32_t __wasm_import_ruby_js_js_runtime_bool_to_js_bool(int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("proc-to-js-function")))
+extern int32_t __wasm_import_ruby_js_js_runtime_proc_to_js_function(int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("rb-object-to-js-rb-value")))
+extern int32_t __wasm_import_ruby_js_js_runtime_rb_object_to_js_rb_value(int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("js-value-to-string")))
+extern void __wasm_import_ruby_js_js_runtime_js_value_to_string(int32_t, uint8_t *);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("js-value-to-integer")))
+extern void __wasm_import_ruby_js_js_runtime_js_value_to_integer(int32_t, uint8_t *);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("export-js-value-to-host")))
+extern void __wasm_import_ruby_js_js_runtime_export_js_value_to_host(int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("import-js-value-from-host")))
+extern int32_t __wasm_import_ruby_js_js_runtime_import_js_value_from_host(void);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("js-value-typeof")))
+extern void __wasm_import_ruby_js_js_runtime_js_value_typeof(int32_t, uint8_t *);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("js-value-equal")))
+extern int32_t __wasm_import_ruby_js_js_runtime_js_value_equal(int32_t, int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("js-value-strictly-equal")))
+extern int32_t __wasm_import_ruby_js_js_runtime_js_value_strictly_equal(int32_t, int32_t);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("reflect-apply")))
+extern void __wasm_import_ruby_js_js_runtime_reflect_apply(int32_t, int32_t, uint8_t *, size_t, uint8_t *);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("reflect-get")))
+extern void __wasm_import_ruby_js_js_runtime_reflect_get(int32_t, uint8_t *, size_t, uint8_t *);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("reflect-set")))
+extern void __wasm_import_ruby_js_js_runtime_reflect_set(int32_t, uint8_t *, size_t, int32_t, uint8_t *);
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("throw-prohibit-rewind-exception")))
+extern void __wasm_import_ruby_js_js_runtime_throw_prohibit_rewind_exception(uint8_t *, size_t);
+
+// Exported Functions from `ruby:js/ruby-runtime`
+
+
+
+
+
+
+
+
+
+
+
+
+
+__attribute__((__weak__, __export_name__("cabi_post_ruby:js/ruby-runtime#rstring-ptr")))
+void __wasm_export_exports_ruby_js_ruby_runtime_rstring_ptr_post_return(uint8_t * arg0) {
+  if ((*((size_t*) (arg0 + 4))) > 0) {
+    free(*((uint8_t **) (arg0 + 0)));
+  }
+}
+
+
+
+
+
+
+
+// Canonical ABI intrinsics
+
+__attribute__((__weak__, __export_name__("cabi_realloc")))
+void *cabi_realloc(void *ptr, size_t old_size, size_t align, size_t new_size) {
+  (void) old_size;
+  if (new_size == 0) return (void*) align;
+  void *ret = realloc(ptr, new_size);
+  if (!ret) abort();
+  return ret;
+}
+
+// Helper Functions
+
+__attribute__((__import_module__("ruby:js/js-runtime"), __import_name__("[resource-drop]js-abi-value")))
+extern void __wasm_import_ruby_js_js_runtime_js_abi_value_drop(int32_t handle);
+
+void ruby_js_js_runtime_js_abi_value_drop_own(ruby_js_js_runtime_own_js_abi_value_t handle) {
+  __wasm_import_ruby_js_js_runtime_js_abi_value_drop(handle.__handle);
+}
+
+ruby_js_js_runtime_borrow_js_abi_value_t ruby_js_js_runtime_borrow_js_abi_value(ruby_js_js_runtime_own_js_abi_value_t arg) {
+  return (ruby_js_js_runtime_borrow_js_abi_value_t) { arg.__handle };
+}
+
+void ruby_js_js_runtime_js_abi_result_free(ruby_js_js_runtime_js_abi_result_t *ptr) {
+  switch ((int32_t) ptr->tag) {
+    case 0: {
+      break;
+    }
+    case 1: {
+      break;
+    }
+  }
+}
+
+void ruby_js_js_runtime_raw_integer_free(ruby_js_js_runtime_raw_integer_t *ptr) {
+  switch ((int32_t) ptr->tag) {
+    case 0: {
+      break;
+    }
+    case 1: {
+      ext_string_free(&ptr->val.bignum);
+      break;
+    }
+  }
+}
+
+void ruby_js_js_runtime_list_borrow_js_abi_value_free(ruby_js_js_runtime_list_borrow_js_abi_value_t *ptr) {
+  size_t list_len = ptr->len;
+  if (list_len > 0) {
+    ruby_js_js_runtime_borrow_js_abi_value_t *list_ptr = ptr->ptr;
+    for (size_t i = 0; i < list_len; i++) {
+    }
+    free(list_ptr);
+  }
+}
+
+__attribute__((__import_module__("ruby:js/ruby-runtime"), __import_name__("[resource-drop]rb-iseq")))
+extern void __wasm_import_exports_ruby_js_ruby_runtime_rb_iseq_drop(int32_t handle);
+
+void exports_ruby_js_ruby_runtime_rb_iseq_drop_own(exports_ruby_js_ruby_runtime_own_rb_iseq_t handle) {
+  __wasm_import_exports_ruby_js_ruby_runtime_rb_iseq_drop(handle.__handle);
+}
+
+__attribute__(( __import_module__("[export]ruby:js/ruby-runtime"), __import_name__("[resource-new]rb-iseq")))
+extern int32_t __wasm_import_exports_ruby_js_ruby_runtime_rb_iseq_new(int32_t);
+
+__attribute__((__import_module__("[export]ruby:js/ruby-runtime"), __import_name__("[resource-rep]rb-iseq")))
+extern int32_t __wasm_import_exports_ruby_js_ruby_runtime_rb_iseq_rep(int32_t);
+
+exports_ruby_js_ruby_runtime_own_rb_iseq_t exports_ruby_js_ruby_runtime_rb_iseq_new(exports_ruby_js_ruby_runtime_rb_iseq_t *rep) {
+  return (exports_ruby_js_ruby_runtime_own_rb_iseq_t) { __wasm_import_exports_ruby_js_ruby_runtime_rb_iseq_new((int32_t) rep) };
+}
+
+exports_ruby_js_ruby_runtime_rb_iseq_t* exports_ruby_js_ruby_runtime_rb_iseq_rep(exports_ruby_js_ruby_runtime_own_rb_iseq_t handle) {
+  return (exports_ruby_js_ruby_runtime_rb_iseq_t*) __wasm_import_exports_ruby_js_ruby_runtime_rb_iseq_rep(handle.__handle);
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#[dtor]rb_iseq")))
+void __wasm_export_exports_ruby_js_ruby_runtime_rb_iseq_dtor(exports_ruby_js_ruby_runtime_rb_iseq_t* arg) {
+  exports_ruby_js_ruby_runtime_rb_iseq_destructor(arg);
+}
+
+__attribute__((__import_module__("ruby:js/ruby-runtime"), __import_name__("[resource-drop]rb-abi-value")))
+extern void __wasm_import_exports_ruby_js_ruby_runtime_rb_abi_value_drop(int32_t handle);
+
+void exports_ruby_js_ruby_runtime_rb_abi_value_drop_own(exports_ruby_js_ruby_runtime_own_rb_abi_value_t handle) {
+  __wasm_import_exports_ruby_js_ruby_runtime_rb_abi_value_drop(handle.__handle);
+}
+
+__attribute__(( __import_module__("[export]ruby:js/ruby-runtime"), __import_name__("[resource-new]rb-abi-value")))
+extern int32_t __wasm_import_exports_ruby_js_ruby_runtime_rb_abi_value_new(int32_t);
+
+__attribute__((__import_module__("[export]ruby:js/ruby-runtime"), __import_name__("[resource-rep]rb-abi-value")))
+extern int32_t __wasm_import_exports_ruby_js_ruby_runtime_rb_abi_value_rep(int32_t);
+
+exports_ruby_js_ruby_runtime_own_rb_abi_value_t exports_ruby_js_ruby_runtime_rb_abi_value_new(exports_ruby_js_ruby_runtime_rb_abi_value_t *rep) {
+  return (exports_ruby_js_ruby_runtime_own_rb_abi_value_t) { __wasm_import_exports_ruby_js_ruby_runtime_rb_abi_value_new((int32_t) rep) };
+}
+
+exports_ruby_js_ruby_runtime_rb_abi_value_t* exports_ruby_js_ruby_runtime_rb_abi_value_rep(exports_ruby_js_ruby_runtime_own_rb_abi_value_t handle) {
+  return (exports_ruby_js_ruby_runtime_rb_abi_value_t*) __wasm_import_exports_ruby_js_ruby_runtime_rb_abi_value_rep(handle.__handle);
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#[dtor]rb_abi_value")))
+void __wasm_export_exports_ruby_js_ruby_runtime_rb_abi_value_dtor(exports_ruby_js_ruby_runtime_rb_abi_value_t* arg) {
+  exports_ruby_js_ruby_runtime_rb_abi_value_destructor(arg);
+}
+
+void ext_list_string_free(ext_list_string_t *ptr) {
+  size_t list_len = ptr->len;
+  if (list_len > 0) {
+    ext_string_t *list_ptr = ptr->ptr;
+    for (size_t i = 0; i < list_len; i++) {
+      ext_string_free(&list_ptr[i]);
+    }
+    free(list_ptr);
+  }
+}
+
+void exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_free(exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_t *ptr) {
+  size_t list_len = ptr->len;
+  if (list_len > 0) {
+    exports_ruby_js_ruby_runtime_borrow_rb_abi_value_t *list_ptr = ptr->ptr;
+    for (size_t i = 0; i < list_len; i++) {
+    }
+    free(list_ptr);
+  }
+}
+
+void ext_string_set(ext_string_t *ret, const char*s) {
+  ret->ptr = (uint8_t*) s;
+  ret->len = strlen(s);
+}
+
+void ext_string_dup(ext_string_t *ret, const char*s) {
+  ret->len = strlen(s);
+  ret->ptr = (uint8_t*) cabi_realloc(NULL, 0, 1, ret->len * 1);
+  memcpy(ret->ptr, s, ret->len * 1);
+}
+
+void ext_string_free(ext_string_t *ret) {
+  if (ret->len > 0) {
+    free(ret->ptr);
+  }
+  ret->ptr = NULL;
+  ret->len = 0;
+}
+
+// Component Adapters
+
+__attribute__((__aligned__(4)))
+static uint8_t RET_AREA[8];
+
+void ruby_js_js_runtime_eval_js(ext_string_t *code, ruby_js_js_runtime_js_abi_result_t *ret) {
+  __attribute__((__aligned__(4)))
+  uint8_t ret_area[8];
+  uint8_t *ptr = (uint8_t *) &ret_area;
+  __wasm_import_ruby_js_js_runtime_eval_js((uint8_t *) (*code).ptr, (*code).len, ptr);
+  ruby_js_js_runtime_js_abi_result_t variant;
+  variant.tag = (int32_t) *((uint8_t*) (ptr + 0));
+  switch ((int32_t) variant.tag) {
+    case 0: {
+      variant.val.success = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+    case 1: {
+      variant.val.failure = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+  }
+  *ret = variant;
+}
+
+bool ruby_js_js_runtime_is_js(ruby_js_js_runtime_borrow_js_abi_value_t value) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_is_js((value).__handle);
+  return ret;
+}
+
+bool ruby_js_js_runtime_instance_of(ruby_js_js_runtime_borrow_js_abi_value_t value, ruby_js_js_runtime_borrow_js_abi_value_t klass) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_instance_of((value).__handle, (klass).__handle);
+  return ret;
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_global_this(void) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_global_this();
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_int_to_js_number(int32_t value) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_int_to_js_number(value);
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_float_to_js_number(double value) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_float_to_js_number(value);
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_string_to_js_string(ext_string_t *value) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_string_to_js_string((uint8_t *) (*value).ptr, (*value).len);
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_bool_to_js_bool(bool value) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_bool_to_js_bool(value);
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_proc_to_js_function(uint32_t value) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_proc_to_js_function((int32_t) (value));
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_rb_object_to_js_rb_value(uint32_t raw_rb_abi_value) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_rb_object_to_js_rb_value((int32_t) (raw_rb_abi_value));
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+void ruby_js_js_runtime_js_value_to_string(ruby_js_js_runtime_borrow_js_abi_value_t value, ext_string_t *ret) {
+  __attribute__((__aligned__(4)))
+  uint8_t ret_area[8];
+  uint8_t *ptr = (uint8_t *) &ret_area;
+  __wasm_import_ruby_js_js_runtime_js_value_to_string((value).__handle, ptr);
+  *ret = (ext_string_t) { (uint8_t*)(*((uint8_t **) (ptr + 0))), (*((size_t*) (ptr + 4))) };
+}
+
+void ruby_js_js_runtime_js_value_to_integer(ruby_js_js_runtime_borrow_js_abi_value_t value, ruby_js_js_runtime_raw_integer_t *ret) {
+  __attribute__((__aligned__(8)))
+  uint8_t ret_area[16];
+  uint8_t *ptr = (uint8_t *) &ret_area;
+  __wasm_import_ruby_js_js_runtime_js_value_to_integer((value).__handle, ptr);
+  ruby_js_js_runtime_raw_integer_t variant;
+  variant.tag = (int32_t) *((uint8_t*) (ptr + 0));
+  switch ((int32_t) variant.tag) {
+    case 0: {
+      variant.val.float_ = *((double*) (ptr + 8));
+      break;
+    }
+    case 1: {
+      variant.val.bignum = (ext_string_t) { (uint8_t*)(*((uint8_t **) (ptr + 8))), (*((size_t*) (ptr + 12))) };
+      break;
+    }
+  }
+  *ret = variant;
+}
+
+void ruby_js_js_runtime_export_js_value_to_host(ruby_js_js_runtime_borrow_js_abi_value_t value) {
+  __wasm_import_ruby_js_js_runtime_export_js_value_to_host((value).__handle);
+}
+
+ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_import_js_value_from_host(void) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_import_js_value_from_host();
+  return (ruby_js_js_runtime_own_js_abi_value_t) { ret };
+}
+
+void ruby_js_js_runtime_js_value_typeof(ruby_js_js_runtime_borrow_js_abi_value_t value, ext_string_t *ret) {
+  __attribute__((__aligned__(4)))
+  uint8_t ret_area[8];
+  uint8_t *ptr = (uint8_t *) &ret_area;
+  __wasm_import_ruby_js_js_runtime_js_value_typeof((value).__handle, ptr);
+  *ret = (ext_string_t) { (uint8_t*)(*((uint8_t **) (ptr + 0))), (*((size_t*) (ptr + 4))) };
+}
+
+bool ruby_js_js_runtime_js_value_equal(ruby_js_js_runtime_borrow_js_abi_value_t lhs, ruby_js_js_runtime_borrow_js_abi_value_t rhs) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_js_value_equal((lhs).__handle, (rhs).__handle);
+  return ret;
+}
+
+bool ruby_js_js_runtime_js_value_strictly_equal(ruby_js_js_runtime_borrow_js_abi_value_t lhs, ruby_js_js_runtime_borrow_js_abi_value_t rhs) {
+  int32_t ret = __wasm_import_ruby_js_js_runtime_js_value_strictly_equal((lhs).__handle, (rhs).__handle);
+  return ret;
+}
+
+void ruby_js_js_runtime_reflect_apply(ruby_js_js_runtime_borrow_js_abi_value_t target, ruby_js_js_runtime_borrow_js_abi_value_t this_argument, ruby_js_js_runtime_list_borrow_js_abi_value_t *arguments, ruby_js_js_runtime_js_abi_result_t *ret) {
+  __attribute__((__aligned__(4)))
+  uint8_t ret_area[8];
+  uint8_t *ptr = (uint8_t *) &ret_area;
+  __wasm_import_ruby_js_js_runtime_reflect_apply((target).__handle, (this_argument).__handle, (uint8_t *) (*arguments).ptr, (*arguments).len, ptr);
+  ruby_js_js_runtime_js_abi_result_t variant;
+  variant.tag = (int32_t) *((uint8_t*) (ptr + 0));
+  switch ((int32_t) variant.tag) {
+    case 0: {
+      variant.val.success = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+    case 1: {
+      variant.val.failure = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+  }
+  *ret = variant;
+}
+
+void ruby_js_js_runtime_reflect_get(ruby_js_js_runtime_borrow_js_abi_value_t target, ext_string_t *property_key, ruby_js_js_runtime_js_abi_result_t *ret) {
+  __attribute__((__aligned__(4)))
+  uint8_t ret_area[8];
+  uint8_t *ptr = (uint8_t *) &ret_area;
+  __wasm_import_ruby_js_js_runtime_reflect_get((target).__handle, (uint8_t *) (*property_key).ptr, (*property_key).len, ptr);
+  ruby_js_js_runtime_js_abi_result_t variant;
+  variant.tag = (int32_t) *((uint8_t*) (ptr + 0));
+  switch ((int32_t) variant.tag) {
+    case 0: {
+      variant.val.success = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+    case 1: {
+      variant.val.failure = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+  }
+  *ret = variant;
+}
+
+void ruby_js_js_runtime_reflect_set(ruby_js_js_runtime_borrow_js_abi_value_t target, ext_string_t *property_key, ruby_js_js_runtime_borrow_js_abi_value_t value, ruby_js_js_runtime_js_abi_result_t *ret) {
+  __attribute__((__aligned__(4)))
+  uint8_t ret_area[8];
+  uint8_t *ptr = (uint8_t *) &ret_area;
+  __wasm_import_ruby_js_js_runtime_reflect_set((target).__handle, (uint8_t *) (*property_key).ptr, (*property_key).len, (value).__handle, ptr);
+  ruby_js_js_runtime_js_abi_result_t variant;
+  variant.tag = (int32_t) *((uint8_t*) (ptr + 0));
+  switch ((int32_t) variant.tag) {
+    case 0: {
+      variant.val.success = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+    case 1: {
+      variant.val.failure = (ruby_js_js_runtime_own_js_abi_value_t) { *((int32_t*) (ptr + 4)) };
+      break;
+    }
+  }
+  *ret = variant;
+}
+
+void ruby_js_js_runtime_throw_prohibit_rewind_exception(ext_string_t *message) {
+  __wasm_import_ruby_js_js_runtime_throw_prohibit_rewind_exception((uint8_t *) (*message).ptr, (*message).len);
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#[constructor]rb-abi-value")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_constructor_rb_abi_value(void) {
+  exports_ruby_js_ruby_runtime_own_rb_abi_value_t ret = exports_ruby_js_ruby_runtime_constructor_rb_abi_value();
+  return (ret).__handle;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#ruby-show-version")))
+void __wasm_export_exports_ruby_js_ruby_runtime_ruby_show_version(void) {
+  exports_ruby_js_ruby_runtime_ruby_show_version();
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#ruby-init")))
+void __wasm_export_exports_ruby_js_ruby_runtime_ruby_init(void) {
+  exports_ruby_js_ruby_runtime_ruby_init();
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#ruby-sysinit")))
+void __wasm_export_exports_ruby_js_ruby_runtime_ruby_sysinit(uint8_t * arg, size_t arg0) {
+  ext_list_string_t arg1 = (ext_list_string_t) { (ext_string_t*)(arg), (arg0) };
+  exports_ruby_js_ruby_runtime_ruby_sysinit(&arg1);
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#ruby-options")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_ruby_options(uint8_t * arg, size_t arg0) {
+  ext_list_string_t arg1 = (ext_list_string_t) { (ext_string_t*)(arg), (arg0) };
+  exports_ruby_js_ruby_runtime_own_rb_iseq_t ret = exports_ruby_js_ruby_runtime_ruby_options(&arg1);
+  return (ret).__handle;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#ruby-script")))
+void __wasm_export_exports_ruby_js_ruby_runtime_ruby_script(uint8_t * arg, size_t arg0) {
+  ext_string_t arg1 = (ext_string_t) { (uint8_t*)(arg), (arg0) };
+  exports_ruby_js_ruby_runtime_ruby_script(&arg1);
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#ruby-init-loadpath")))
+void __wasm_export_exports_ruby_js_ruby_runtime_ruby_init_loadpath(void) {
+  exports_ruby_js_ruby_runtime_ruby_init_loadpath();
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-eval-string-protect")))
+uint8_t * __wasm_export_exports_ruby_js_ruby_runtime_rb_eval_string_protect(uint8_t * arg, size_t arg0) {
+  ext_string_t arg1 = (ext_string_t) { (uint8_t*)(arg), (arg0) };
+  exports_ruby_js_ruby_runtime_tuple2_own_rb_abi_value_s32_t ret;
+  exports_ruby_js_ruby_runtime_rb_eval_string_protect(&arg1, &ret);
+  uint8_t *ptr = (uint8_t *) &RET_AREA;
+  *((int32_t*)(ptr + 0)) = ((ret).f0).__handle;
+  *((int32_t*)(ptr + 4)) = (ret).f1;
+  return ptr;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-funcallv-protect")))
+uint8_t * __wasm_export_exports_ruby_js_ruby_runtime_rb_funcallv_protect(int32_t arg, int32_t arg0, uint8_t * arg1, size_t arg2) {
+  exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_t arg3 = (exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_t) { (exports_ruby_js_ruby_runtime_borrow_rb_abi_value_t*)(arg1), (arg2) };
+  exports_ruby_js_ruby_runtime_tuple2_own_rb_abi_value_s32_t ret;
+  exports_ruby_js_ruby_runtime_rb_funcallv_protect(((exports_ruby_js_ruby_runtime_rb_abi_value_t*) arg), (uint32_t) (arg0), &arg3, &ret);
+  uint8_t *ptr = (uint8_t *) &RET_AREA;
+  *((int32_t*)(ptr + 0)) = ((ret).f0).__handle;
+  *((int32_t*)(ptr + 4)) = (ret).f1;
+  return ptr;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-intern")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_rb_intern(uint8_t * arg, size_t arg0) {
+  ext_string_t arg1 = (ext_string_t) { (uint8_t*)(arg), (arg0) };
+  exports_ruby_js_ruby_runtime_rb_id_t ret = exports_ruby_js_ruby_runtime_rb_intern(&arg1);
+  return (int32_t) (ret);
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-errinfo")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_rb_errinfo(void) {
+  exports_ruby_js_ruby_runtime_own_rb_abi_value_t ret = exports_ruby_js_ruby_runtime_rb_errinfo();
+  return (ret).__handle;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-clear-errinfo")))
+void __wasm_export_exports_ruby_js_ruby_runtime_rb_clear_errinfo(void) {
+  exports_ruby_js_ruby_runtime_rb_clear_errinfo();
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rstring-ptr")))
+uint8_t * __wasm_export_exports_ruby_js_ruby_runtime_rstring_ptr(int32_t arg) {
+  ext_string_t ret;
+  exports_ruby_js_ruby_runtime_rstring_ptr(((exports_ruby_js_ruby_runtime_rb_abi_value_t*) arg), &ret);
+  uint8_t *ptr = (uint8_t *) &RET_AREA;
+  *((size_t*)(ptr + 4)) = (ret).len;
+  *((uint8_t **)(ptr + 0)) = (uint8_t *) (ret).ptr;
+  return ptr;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-vm-bugreport")))
+void __wasm_export_exports_ruby_js_ruby_runtime_rb_vm_bugreport(void) {
+  exports_ruby_js_ruby_runtime_rb_vm_bugreport();
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-gc-enable")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_rb_gc_enable(void) {
+  bool ret = exports_ruby_js_ruby_runtime_rb_gc_enable();
+  return ret;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-gc-disable")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_rb_gc_disable(void) {
+  bool ret = exports_ruby_js_ruby_runtime_rb_gc_disable();
+  return ret;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#rb-set-should-prohibit-rewind")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_rb_set_should_prohibit_rewind(int32_t arg) {
+  bool ret = exports_ruby_js_ruby_runtime_rb_set_should_prohibit_rewind(arg);
+  return ret;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#wrap-js-value")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_wrap_js_value(int32_t arg) {
+  exports_ruby_js_ruby_runtime_own_rb_abi_value_t ret = exports_ruby_js_ruby_runtime_wrap_js_value((exports_ruby_js_ruby_runtime_own_js_abi_value_t) { arg });
+  return (ret).__handle;
+}
+
+__attribute__((__export_name__("ruby:js/ruby-runtime#to-js-value")))
+int32_t __wasm_export_exports_ruby_js_ruby_runtime_to_js_value(int32_t arg) {
+  exports_ruby_js_ruby_runtime_own_js_abi_value_t ret = exports_ruby_js_ruby_runtime_to_js_value(((exports_ruby_js_ruby_runtime_rb_abi_value_t*) arg));
+  return (ret).__handle;
+}
+
+// Ensure that the *_component_type.o object is linked in
+
+extern void __component_type_object_force_link_ext(void);
+void __component_type_object_force_link_ext_public_use_in_this_compilation_unit(void) {
+  __component_type_object_force_link_ext();
+}
diff --git a/packages/gems/js/ext/js/bindgen/ext.h b/packages/gems/js/ext/js/bindgen/ext.h
new file mode 100644
index 0000000000..2a71c53a06
--- /dev/null
+++ b/packages/gems/js/ext/js/bindgen/ext.h
@@ -0,0 +1,174 @@
+// Generated by `wit-bindgen` 0.24.0. DO NOT EDIT!
+#ifndef __BINDINGS_EXT_H
+#define __BINDINGS_EXT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct ext_string_t {
+  uint8_t*ptr;
+  size_t len;
+} ext_string_t;
+
+typedef struct ruby_js_js_runtime_own_js_abi_value_t {
+  int32_t __handle;
+} ruby_js_js_runtime_own_js_abi_value_t;
+
+typedef struct ruby_js_js_runtime_borrow_js_abi_value_t {
+  int32_t __handle;
+} ruby_js_js_runtime_borrow_js_abi_value_t;
+
+typedef struct ruby_js_js_runtime_js_abi_result_t {
+  uint8_t tag;
+  union {
+    ruby_js_js_runtime_own_js_abi_value_t     success;
+    ruby_js_js_runtime_own_js_abi_value_t     failure;
+  } val;
+} ruby_js_js_runtime_js_abi_result_t;
+
+#define RUBY_JS_JS_RUNTIME_JS_ABI_RESULT_SUCCESS 0
+#define RUBY_JS_JS_RUNTIME_JS_ABI_RESULT_FAILURE 1
+
+typedef struct ruby_js_js_runtime_raw_integer_t {
+  uint8_t tag;
+  union {
+    double     float_;
+    ext_string_t     bignum;
+  } val;
+} ruby_js_js_runtime_raw_integer_t;
+
+#define RUBY_JS_JS_RUNTIME_RAW_INTEGER_FLOAT 0
+#define RUBY_JS_JS_RUNTIME_RAW_INTEGER_BIGNUM 1
+
+typedef struct ruby_js_js_runtime_list_borrow_js_abi_value_t {
+  ruby_js_js_runtime_borrow_js_abi_value_t *ptr;
+  size_t len;
+} ruby_js_js_runtime_list_borrow_js_abi_value_t;
+
+typedef struct exports_ruby_js_ruby_runtime_own_rb_iseq_t {
+  int32_t __handle;
+} exports_ruby_js_ruby_runtime_own_rb_iseq_t;
+
+typedef struct exports_ruby_js_ruby_runtime_rb_iseq_t exports_ruby_js_ruby_runtime_rb_iseq_t;
+
+typedef exports_ruby_js_ruby_runtime_rb_iseq_t* exports_ruby_js_ruby_runtime_borrow_rb_iseq_t;
+
+typedef struct exports_ruby_js_ruby_runtime_own_rb_abi_value_t {
+  int32_t __handle;
+} exports_ruby_js_ruby_runtime_own_rb_abi_value_t;
+
+typedef struct exports_ruby_js_ruby_runtime_rb_abi_value_t exports_ruby_js_ruby_runtime_rb_abi_value_t;
+
+typedef exports_ruby_js_ruby_runtime_rb_abi_value_t* exports_ruby_js_ruby_runtime_borrow_rb_abi_value_t;
+
+typedef int32_t exports_ruby_js_ruby_runtime_rb_errno_t;
+
+typedef uint32_t exports_ruby_js_ruby_runtime_rb_id_t;
+
+typedef struct ext_list_string_t {
+  ext_string_t *ptr;
+  size_t len;
+} ext_list_string_t;
+
+typedef struct exports_ruby_js_ruby_runtime_tuple2_own_rb_abi_value_s32_t {
+  exports_ruby_js_ruby_runtime_own_rb_abi_value_t f0;
+  int32_t f1;
+} exports_ruby_js_ruby_runtime_tuple2_own_rb_abi_value_s32_t;
+
+typedef struct exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_t {
+  exports_ruby_js_ruby_runtime_borrow_rb_abi_value_t *ptr;
+  size_t len;
+} exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_t;
+
+typedef ruby_js_js_runtime_own_js_abi_value_t exports_ruby_js_ruby_runtime_own_js_abi_value_t;
+
+// Imported Functions from `ruby:js/js-runtime`
+extern void ruby_js_js_runtime_eval_js(ext_string_t *code, ruby_js_js_runtime_js_abi_result_t *ret);
+extern bool ruby_js_js_runtime_is_js(ruby_js_js_runtime_borrow_js_abi_value_t value);
+extern bool ruby_js_js_runtime_instance_of(ruby_js_js_runtime_borrow_js_abi_value_t value, ruby_js_js_runtime_borrow_js_abi_value_t klass);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_global_this(void);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_int_to_js_number(int32_t value);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_float_to_js_number(double value);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_string_to_js_string(ext_string_t *value);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_bool_to_js_bool(bool value);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_proc_to_js_function(uint32_t value);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_rb_object_to_js_rb_value(uint32_t raw_rb_abi_value);
+extern void ruby_js_js_runtime_js_value_to_string(ruby_js_js_runtime_borrow_js_abi_value_t value, ext_string_t *ret);
+extern void ruby_js_js_runtime_js_value_to_integer(ruby_js_js_runtime_borrow_js_abi_value_t value, ruby_js_js_runtime_raw_integer_t *ret);
+extern void ruby_js_js_runtime_export_js_value_to_host(ruby_js_js_runtime_borrow_js_abi_value_t value);
+extern ruby_js_js_runtime_own_js_abi_value_t ruby_js_js_runtime_import_js_value_from_host(void);
+extern void ruby_js_js_runtime_js_value_typeof(ruby_js_js_runtime_borrow_js_abi_value_t value, ext_string_t *ret);
+extern bool ruby_js_js_runtime_js_value_equal(ruby_js_js_runtime_borrow_js_abi_value_t lhs, ruby_js_js_runtime_borrow_js_abi_value_t rhs);
+extern bool ruby_js_js_runtime_js_value_strictly_equal(ruby_js_js_runtime_borrow_js_abi_value_t lhs, ruby_js_js_runtime_borrow_js_abi_value_t rhs);
+extern void ruby_js_js_runtime_reflect_apply(ruby_js_js_runtime_borrow_js_abi_value_t target, ruby_js_js_runtime_borrow_js_abi_value_t this_argument, ruby_js_js_runtime_list_borrow_js_abi_value_t *arguments, ruby_js_js_runtime_js_abi_result_t *ret);
+extern void ruby_js_js_runtime_reflect_get(ruby_js_js_runtime_borrow_js_abi_value_t target, ext_string_t *property_key, ruby_js_js_runtime_js_abi_result_t *ret);
+extern void ruby_js_js_runtime_reflect_set(ruby_js_js_runtime_borrow_js_abi_value_t target, ext_string_t *property_key, ruby_js_js_runtime_borrow_js_abi_value_t value, ruby_js_js_runtime_js_abi_result_t *ret);
+extern void ruby_js_js_runtime_throw_prohibit_rewind_exception(ext_string_t *message);
+
+// Exported Functions from `ruby:js/ruby-runtime`
+exports_ruby_js_ruby_runtime_own_rb_abi_value_t exports_ruby_js_ruby_runtime_constructor_rb_abi_value(void);
+void exports_ruby_js_ruby_runtime_ruby_show_version(void);
+void exports_ruby_js_ruby_runtime_ruby_init(void);
+void exports_ruby_js_ruby_runtime_ruby_sysinit(ext_list_string_t *args);
+exports_ruby_js_ruby_runtime_own_rb_iseq_t exports_ruby_js_ruby_runtime_ruby_options(ext_list_string_t *args);
+void exports_ruby_js_ruby_runtime_ruby_script(ext_string_t *name);
+void exports_ruby_js_ruby_runtime_ruby_init_loadpath(void);
+void exports_ruby_js_ruby_runtime_rb_eval_string_protect(ext_string_t *str, exports_ruby_js_ruby_runtime_tuple2_own_rb_abi_value_s32_t *ret);
+void exports_ruby_js_ruby_runtime_rb_funcallv_protect(exports_ruby_js_ruby_runtime_borrow_rb_abi_value_t recv, exports_ruby_js_ruby_runtime_rb_id_t mid, exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_t *args, exports_ruby_js_ruby_runtime_tuple2_own_rb_abi_value_s32_t *ret);
+exports_ruby_js_ruby_runtime_rb_id_t exports_ruby_js_ruby_runtime_rb_intern(ext_string_t *name);
+exports_ruby_js_ruby_runtime_own_rb_abi_value_t exports_ruby_js_ruby_runtime_rb_errinfo(void);
+void exports_ruby_js_ruby_runtime_rb_clear_errinfo(void);
+void exports_ruby_js_ruby_runtime_rstring_ptr(exports_ruby_js_ruby_runtime_borrow_rb_abi_value_t value, ext_string_t *ret);
+void exports_ruby_js_ruby_runtime_rb_vm_bugreport(void);
+bool exports_ruby_js_ruby_runtime_rb_gc_enable(void);
+bool exports_ruby_js_ruby_runtime_rb_gc_disable(void);
+bool exports_ruby_js_ruby_runtime_rb_set_should_prohibit_rewind(bool new_value);
+exports_ruby_js_ruby_runtime_own_rb_abi_value_t exports_ruby_js_ruby_runtime_wrap_js_value(exports_ruby_js_ruby_runtime_own_js_abi_value_t value);
+exports_ruby_js_ruby_runtime_own_js_abi_value_t exports_ruby_js_ruby_runtime_to_js_value(exports_ruby_js_ruby_runtime_borrow_rb_abi_value_t value);
+
+// Helper Functions
+
+extern void ruby_js_js_runtime_js_abi_value_drop_own(ruby_js_js_runtime_own_js_abi_value_t handle);
+
+extern ruby_js_js_runtime_borrow_js_abi_value_t ruby_js_js_runtime_borrow_js_abi_value(ruby_js_js_runtime_own_js_abi_value_t handle);
+
+void ruby_js_js_runtime_js_abi_result_free(ruby_js_js_runtime_js_abi_result_t *ptr);
+
+void ruby_js_js_runtime_raw_integer_free(ruby_js_js_runtime_raw_integer_t *ptr);
+
+void ruby_js_js_runtime_list_borrow_js_abi_value_free(ruby_js_js_runtime_list_borrow_js_abi_value_t *ptr);
+
+extern void exports_ruby_js_ruby_runtime_rb_iseq_drop_own(exports_ruby_js_ruby_runtime_own_rb_iseq_t handle);
+
+extern exports_ruby_js_ruby_runtime_own_rb_iseq_t exports_ruby_js_ruby_runtime_rb_iseq_new(exports_ruby_js_ruby_runtime_rb_iseq_t *rep);
+extern exports_ruby_js_ruby_runtime_rb_iseq_t* exports_ruby_js_ruby_runtime_rb_iseq_rep(exports_ruby_js_ruby_runtime_own_rb_iseq_t handle);
+void exports_ruby_js_ruby_runtime_rb_iseq_destructor(exports_ruby_js_ruby_runtime_rb_iseq_t *rep);
+
+extern void exports_ruby_js_ruby_runtime_rb_abi_value_drop_own(exports_ruby_js_ruby_runtime_own_rb_abi_value_t handle);
+
+extern exports_ruby_js_ruby_runtime_own_rb_abi_value_t exports_ruby_js_ruby_runtime_rb_abi_value_new(exports_ruby_js_ruby_runtime_rb_abi_value_t *rep);
+extern exports_ruby_js_ruby_runtime_rb_abi_value_t* exports_ruby_js_ruby_runtime_rb_abi_value_rep(exports_ruby_js_ruby_runtime_own_rb_abi_value_t handle);
+void exports_ruby_js_ruby_runtime_rb_abi_value_destructor(exports_ruby_js_ruby_runtime_rb_abi_value_t *rep);
+
+void ext_list_string_free(ext_list_string_t *ptr);
+
+void exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_free(exports_ruby_js_ruby_runtime_list_borrow_rb_abi_value_t *ptr);
+
+// Transfers ownership of `s` into the string `ret`
+void ext_string_set(ext_string_t *ret, const char*s);
+
+// Creates a copy of the input nul-terminate string `s` and
+// stores it into the component model string `ret`.
+void ext_string_dup(ext_string_t *ret, const char*s);
+
+// Deallocates the string pointed to by `ret`, deallocating
+// the memory behind the string.
+void ext_string_free(ext_string_t *ret);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/packages/gems/js/ext/js/bindgen/ext_component_type.o b/packages/gems/js/ext/js/bindgen/ext_component_type.o
new file mode 100644
index 0000000000..c48b62f0c1
Binary files /dev/null and b/packages/gems/js/ext/js/bindgen/ext_component_type.o differ
diff --git a/packages/gems/js/ext/js/depend b/packages/gems/js/ext/js/depend
index be6a5059e8..4166bd828f 100644
--- a/packages/gems/js/ext/js/depend
+++ b/packages/gems/js/ext/js/depend
@@ -1,5 +1,6 @@
 link.filelist:
 	echo $(foreach obj,$(OBJS),$(abspath $(obj))) > $@
+	echo $(EXTRA_OBJS) >> $@
 	echo -mexec-model=reactor >> $@
 
 js.a: link.filelist
@@ -9,3 +10,7 @@ js-core.o: $(srcdir)/bindgen/legacy/rb-js-abi-host.h
 bindgen/legacy/%.o: $(srcdir)/bindgen/legacy/%.c
 	@mkdir -p "$(@D)"
 	$(CC) -c -I$(srcdir)/bindgen/legacy -o $@ $<
+
+bindgen/ext.o: $(srcdir)/bindgen/ext.c
+	@mkdir -p "$(@D)"
+	$(CC) -c -o $@ $<
diff --git a/packages/gems/js/ext/js/extconf.rb b/packages/gems/js/ext/js/extconf.rb
index 86a2b7fbf6..fb8ed2fb47 100644
--- a/packages/gems/js/ext/js/extconf.rb
+++ b/packages/gems/js/ext/js/extconf.rb
@@ -1,3 +1,16 @@
 require "mkmf"
-$objs = %w[js-core.o witapi-core.o bindgen/legacy/rb-js-abi-host.o bindgen/legacy/rb-abi-guest.o]
-create_makefile("js")
+$objs = %w[js-core.o witapi-core.o]
+
+use_component_model = enable_config("component-model", false)
+$stderr.print "Building with component model: "
+$stderr.puts use_component_model ? "\e[1;32myes\e[0m" : "\e[1;31mno\e[0m"
+if use_component_model
+  $defs << "-DJS_ENABLE_COMPONENT_MODEL=1"
+  $objs << "bindgen/ext.o"
+else
+  $objs << "bindgen/legacy/rb-js-abi-host.o"
+  $objs << "bindgen/legacy/rb-abi-guest.o"
+end
+create_makefile("js") do |mk|
+  mk << "EXTRA_OBJS = $(srcdir)/bindgen/ext_component_type.o\n" if use_component_model
+end
diff --git a/packages/gems/js/wit/js-runtime.wit b/packages/gems/js/wit/js-runtime.wit
new file mode 100644
index 0000000000..5ea8c974ee
--- /dev/null
+++ b/packages/gems/js/wit/js-runtime.wit
@@ -0,0 +1,45 @@
+package ruby:js;
+
+interface js-runtime {
+
+    resource js-abi-value {}
+
+    variant js-abi-result {
+        success(js-abi-value),
+        failure(js-abi-value),
+    }
+
+    eval-js: func(code: string) -> js-abi-result;
+    is-js: func(value: borrow<js-abi-value>) -> bool;
+    instance-of: func(value: borrow<js-abi-value>, klass: borrow<js-abi-value>) -> bool;
+    global-this: func() -> js-abi-value;
+    int-to-js-number: func(value: s32) -> js-abi-value;
+    float-to-js-number: func(value: float64) -> js-abi-value;
+    string-to-js-string: func(value: string) -> js-abi-value;
+    bool-to-js-bool: func(value: bool) -> js-abi-value;
+    proc-to-js-function: func(value: u32) -> js-abi-value;
+    rb-object-to-js-rb-value: func(raw-rb-abi-value: u32) -> js-abi-value;
+
+    js-value-to-string: func(value: borrow<js-abi-value>) -> string;
+
+    variant raw-integer {
+        float(float64),
+        bignum(string),
+    }
+
+    js-value-to-integer: func(value: borrow<js-abi-value>) -> raw-integer;
+
+    export-js-value-to-host: func(value: borrow<js-abi-value>);
+    import-js-value-from-host: func() -> js-abi-value;
+
+    js-value-typeof: func(value: borrow<js-abi-value>) -> string;
+
+    js-value-equal: func(lhs: borrow<js-abi-value>, rhs: borrow<js-abi-value>) -> bool;
+    js-value-strictly-equal: func(lhs: borrow<js-abi-value>, rhs: borrow<js-abi-value>) -> bool;
+
+    reflect-apply: func(target: borrow<js-abi-value>, this-argument: borrow<js-abi-value>, arguments: list<borrow<js-abi-value>>) -> js-abi-result;
+    reflect-get: func(target: borrow<js-abi-value>, property-key: string) -> js-abi-result;
+    reflect-set: func(target: borrow<js-abi-value>, property-key: string, value: borrow<js-abi-value>) -> js-abi-result;
+
+    throw-prohibit-rewind-exception: func(message: string);
+}
diff --git a/packages/gems/js/wit/ruby-runtime.wit b/packages/gems/js/wit/ruby-runtime.wit
new file mode 100644
index 0000000000..d7259ebfe4
--- /dev/null
+++ b/packages/gems/js/wit/ruby-runtime.wit
@@ -0,0 +1,36 @@
+package ruby:js;
+
+interface ruby-runtime {
+    use js-runtime.{js-abi-value};
+
+    resource rb-iseq {}
+    resource rb-abi-value {
+        constructor();
+    }
+
+    type rb-errno = s32;
+    type rb-id = u32;
+
+    ruby-show-version: func();
+    ruby-init: func();
+    ruby-sysinit: func(args: list<string>);
+    ruby-options: func(args: list<string>) -> rb-iseq;
+    ruby-script: func(name: string);
+    ruby-init-loadpath: func();
+    rb-eval-string-protect: func(str: string) -> tuple<rb-abi-value, s32>;
+    rb-funcallv-protect: func(recv: borrow<rb-abi-value>, mid: rb-id, args: list<borrow<rb-abi-value>>) -> tuple<rb-abi-value, s32>;
+    rb-intern: func(name: string) -> rb-id;
+    rb-errinfo: func() -> rb-abi-value;
+    rb-clear-errinfo: func();
+
+    rstring-ptr: func(value: borrow<rb-abi-value>) -> string;
+
+    rb-vm-bugreport: func();
+
+    rb-gc-enable: func() -> bool;
+    rb-gc-disable: func() -> bool;
+
+    rb-set-should-prohibit-rewind: func(new-value: bool) -> bool;
+    wrap-js-value: func(value: js-abi-value) -> rb-abi-value;
+    to-js-value: func(value: borrow<rb-abi-value>) -> js-abi-value;
+}
diff --git a/packages/gems/js/wit/world.wit b/packages/gems/js/wit/world.wit
new file mode 100644
index 0000000000..b9b2aecd21
--- /dev/null
+++ b/packages/gems/js/wit/world.wit
@@ -0,0 +1,6 @@
+package ruby:js;
+
+world ext {
+  import js-runtime;
+  export ruby-runtime;
+}
diff --git a/rakelib/check.rake b/rakelib/check.rake
index 3d06c8e2f8..cb68b5795e 100644
--- a/rakelib/check.rake
+++ b/rakelib/check.rake
@@ -1,22 +1,24 @@
 namespace :check do
+  legacy_wit_bindgen = RubyWasm::WitBindgen.new(build_dir: "build", revision: "251e84b89121751f79ac268629e9285082b2596d")
   wit_bindgen = RubyWasm::WitBindgen.new(build_dir: "build")
   task :install_wit_bindgen do
+    legacy_wit_bindgen.install
     wit_bindgen.install
   end
-  task bindgen_c: :install_wit_bindgen do
+  task legacy_bindgen_c: :install_wit_bindgen do
     wits = [
       %w[packages/gems/js/ext/js/bindgen/legacy/rb-abi-guest.wit --export],
       %w[packages/gems/js/ext/js/bindgen/legacy/rb-js-abi-host.wit --import]
     ]
     wits.each do |wit|
       path, mode = wit
-      sh "#{wit_bindgen.bin_path} guest c #{mode} #{path} --out-dir #{File.dirname(path)}"
+      sh "#{legacy_wit_bindgen.bin_path} guest c #{mode} #{path} --out-dir #{File.dirname(path)}"
     end
   end
 
-  task bindgen_js: :install_wit_bindgen do
+  task legacy_bindgen_js: :install_wit_bindgen do
     sh *[
-         wit_bindgen.bin_path,
+         legacy_wit_bindgen.bin_path,
          "host",
          "js",
          "--import",
@@ -28,8 +30,19 @@ namespace :check do
        ]
   end
 
+  task bindgen_c: :install_wit_bindgen do
+    js_pkg_dir = "packages/gems/js"
+    sh(
+      wit_bindgen.bin_path,
+      "c",
+      File.join(js_pkg_dir, "wit"),
+      "--out-dir",
+      File.join(js_pkg_dir, "ext", "js", "bindgen")
+    )
+  end
+
   desc "Check wit-bindgen'ed sources are up-to-date"
-  task bindgen: %i[bindgen_c bindgen_js]
+  task bindgen: %i[bindgen_c legacy_bindgen_c legacy_bindgen_js]
 
   task :type do
     sh "bundle exec steep check"
diff --git a/sig/ruby_wasm/build.rbs b/sig/ruby_wasm/build.rbs
index c20f3aa36d..5f1b714d6b 100644
--- a/sig/ruby_wasm/build.rbs
+++ b/sig/ruby_wasm/build.rbs
@@ -158,9 +158,10 @@ module RubyWasm
     @toolchain: Toolchain
     @srcdir: String
     @ext_relative_path: String
+    @features: RubyWasm::FeatureSet
 
     attr_reader name: String
-    def initialize: (String srcdir, Toolchain toolchain, ?ext_relative_path: String?) -> void
+    def initialize: (String srcdir, Toolchain toolchain, features: RubyWasm::FeatureSet, ?ext_relative_path: String?) -> void
     def product_build_dir: (CrossRubyProduct crossruby) -> String
     def linklist: (CrossRubyProduct crossruby) -> String
     def metadata_json: (CrossRubyProduct crossruby) -> String