refactor: remove Deno.core (#16881)

This commit removes "Deno.core" namespace. It is strictly private API
that has no stability guarantees, we were supposed to remove it long time ago.

Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

43 files changed, 104 insertions, 89 deletions

diff --git a/cli/bench/async_ops.js b/cli/bench/async_ops.js
index d608e7a9e..fe041efe8 100644
--- a/cli/bench/async_ops.js
+++ b/cli/bench/async_ops.js
@@ -16,5 +16,5 @@ async function bench(fun) {
   if (--total) queueMicrotask(() => bench(fun));
 }
 
-const { ops } = Deno.core;
+const { ops } = Deno[Deno.internal].core;
 bench(() => ops.op_void_async());
diff --git a/cli/bench/deno_common.js b/cli/bench/deno_common.js
index 2676fc8de..31ab05fba 100644
--- a/cli/bench/deno_common.js
+++ b/cli/bench/deno_common.js
@@ -8,7 +8,7 @@ Deno.bench("date_now", { n: 5e5 }, () => {
 // Fast API calls
 {
   // deno-lint-ignore camelcase
-  const { op_add } = Deno.core.ops;
+  const { op_add } = Deno[Deno.internal].core.ops;
   // deno-lint-ignore no-inner-declarations
   function add(a, b) {
     return op_add(a, b);
@@ -22,7 +22,7 @@ Deno.bench("date_now", { n: 5e5 }, () => {
 }
 
 // deno-lint-ignore camelcase
-const { op_void_sync } = Deno.core.ops;
+const { op_void_sync } = Deno[Deno.internal].core.ops;
 function sync() {
   return op_void_sync();
 }
@@ -34,7 +34,7 @@ Deno.bench("op_void_sync", () => sync());
 Deno.bench(
   "op_void_async",
   { n: 1e6 },
-  () => Deno.core.opAsync("op_void_async"),
+  () => Deno[Deno.internal].core.opAsync("op_void_async"),
 );
 
 // A very lightweight op, that should be highly optimizable
diff --git a/cli/bench/http/deno_http_flash_ops.js b/cli/bench/http/deno_http_flash_ops.js
index 1ef2f65ed..7b024f9af 100644
--- a/cli/bench/http/deno_http_flash_ops.js
+++ b/cli/bench/http/deno_http_flash_ops.js
@@ -3,12 +3,10 @@
 // deno-lint-ignore-file
 
 const {
-  core: {
-    opAsync,
-    ops: { op_flash_make_request, op_flash_serve },
-    encode,
-  },
-} = Deno;
+  opAsync,
+  ops: { op_flash_make_request, op_flash_serve },
+  encode,
+} = Deno[Deno.internal].core;
 const addr = Deno.args[0] || "127.0.0.1:4500";
 const [hostname, port] = addr.split(":");
 const serverId = op_flash_serve({ hostname, port, reuseport: true });
diff --git a/cli/bench/http/deno_http_ops.js b/cli/bench/http/deno_http_ops.js
index 3fd0bef31..216a47905 100644
--- a/cli/bench/http/deno_http_ops.js
+++ b/cli/bench/http/deno_http_ops.js
@@ -13,7 +13,10 @@ class Http {
   [Symbol.asyncIterator]() {
     return {
       next: async () => {
-        const reqEvt = await Deno.core.opAsync("op_http_accept", this.id);
+        const reqEvt = await Deno[Deno.internal].core.opAsync(
+          "op_http_accept",
+          this.id,
+        );
         return { value: reqEvt ?? undefined, done: reqEvt === null };
       },
     };
@@ -21,20 +24,20 @@ class Http {
 }
 
 for await (const conn of tcp) {
-  const id = Deno.core.ops.op_http_start(conn.rid);
+  const id = Deno[Deno.internal].core.ops.op_http_start(conn.rid);
   const http = new Http(id);
   (async () => {
     for await (const req of http) {
       if (req == null) continue;
       const { 0: stream } = req;
-      await Deno.core.opAsync(
+      await Deno[Deno.internal].core.opAsync(
         "op_http_write_headers",
         stream,
         200,
         [],
         "Hello World",
       );
-      Deno.core.close(stream);
+      Deno[Deno.internal].core.close(stream);
     }
   })();
 }
diff --git a/cli/bench/testdata/deno_upgrade_http.js b/cli/bench/testdata/deno_upgrade_http.js
index db14f8589..ca5533411 100644
--- a/cli/bench/testdata/deno_upgrade_http.js
+++ b/cli/bench/testdata/deno_upgrade_http.js
@@ -1,5 +1,7 @@
 const { serve, upgradeHttpRaw } = Deno;
-const u8 = Deno.core.encode("HTTP/1.1 101 Switching Protocols\r\n\r\n");
+const u8 = Deno[Deno.internal].core.encode(
+  "HTTP/1.1 101 Switching Protocols\r\n\r\n",
+);
 
 async function handler(req) {
   const [conn, _firstPacket] = upgradeHttpRaw(req);
diff --git a/cli/tests/integration/inspector_tests.rs b/cli/tests/integration/inspector_tests.rs
index e291c17bb..5b01522d5 100644
--- a/cli/tests/integration/inspector_tests.rs
+++ b/cli/tests/integration/inspector_tests.rs
@@ -318,7 +318,7 @@ async fn inspector_break_on_first_line() {
       "id":4,
       "method":"Runtime.evaluate",
       "params":{
-        "expression":"Deno.core.print(\"hello from the inspector\\n\")",
+        "expression":"Deno[Deno.internal].core.print(\"hello from the inspector\\n\")",
         "contextId":1,
         "includeCommandLineAPI":true,
         "silent":false,
diff --git a/cli/tests/testdata/bench/recursive_permissions_pledge.js b/cli/tests/testdata/bench/recursive_permissions_pledge.js
index dbba96f26..9bf320c37 100644
--- a/cli/tests/testdata/bench/recursive_permissions_pledge.js
+++ b/cli/tests/testdata/bench/recursive_permissions_pledge.js
@@ -1,6 +1,6 @@
-Deno.core.ops.op_pledge_test_permissions(
+Deno[Deno.internal].core.ops.op_pledge_test_permissions(
   "none",
 );
-Deno.core.ops.op_pledge_test_permissions(
+Deno[Deno.internal].core.ops.op_pledge_test_permissions(
   "inherit",
 );
diff --git a/cli/tests/testdata/npm/registry/@denotest/child-process-fork/1.0.0/index.js b/cli/tests/testdata/npm/registry/@denotest/child-process-fork/1.0.0/index.js
index 674268e6f..6f7dceb98 100644
--- a/cli/tests/testdata/npm/registry/@denotest/child-process-fork/1.0.0/index.js
+++ b/cli/tests/testdata/npm/registry/@denotest/child-process-fork/1.0.0/index.js
@@ -4,7 +4,7 @@ function childProcessFork(path) {
   const p = Deno.run({
     cmd: [Deno.execPath(), "run", "--unstable", "-A", path],
     env: {
-      "DENO_DONT_USE_INTERNAL_NODE_COMPAT_STATE": Deno.core.ops.op_npm_process_state(),
+      "DENO_DONT_USE_INTERNAL_NODE_COMPAT_STATE": Deno[Deno.internal].core.ops.op_npm_process_state(),
     }
   });
   p.status().then(() => {
diff --git a/cli/tests/testdata/run/042_dyn_import_evalcontext.ts b/cli/tests/testdata/run/042_dyn_import_evalcontext.ts
index ccda3a972..6a9ffb971 100644
--- a/cli/tests/testdata/run/042_dyn_import_evalcontext.ts
+++ b/cli/tests/testdata/run/042_dyn_import_evalcontext.ts
@@ -1,4 +1,4 @@
-// @ts-expect-error "Deno.core" is not a public interface
-Deno.core.evalContext(
+// @ts-expect-error "Deno[Deno.internal].core" is not a public interface
+Deno[Deno.internal].core.evalContext(
   "(async () => console.log(await import('./subdir/mod4.js')))()",
 );
diff --git a/cli/tests/testdata/run/eval_context_throw_dom_exception.js b/cli/tests/testdata/run/eval_context_throw_dom_exception.js
index b8e99d498..31baeedfc 100644
--- a/cli/tests/testdata/run/eval_context_throw_dom_exception.js
+++ b/cli/tests/testdata/run/eval_context_throw_dom_exception.js
@@ -1,2 +1,4 @@
-const [, errorInfo] = Deno.core.evalContext('throw new DOMException("foo")');
+const [, errorInfo] = Deno[Deno.internal].core.evalContext(
+  'throw new DOMException("foo")',
+);
 console.log(errorInfo);
diff --git a/cli/tests/testdata/run/event_listener_error_immediate_exit.ts b/cli/tests/testdata/run/event_listener_error_immediate_exit.ts
index c9e94c01b..292a0df00 100644
--- a/cli/tests/testdata/run/event_listener_error_immediate_exit.ts
+++ b/cli/tests/testdata/run/event_listener_error_immediate_exit.ts
@@ -4,9 +4,9 @@ addEventListener("foo", () => {
   throw new Error("bar");
 });
 console.log(1);
-// @ts-ignore Deno.core
-Deno.core.setNextTickCallback(() => console.log("nextTick"));
-// @ts-ignore Deno.core
-Deno.core.setHasTickScheduled(true);
+// @ts-ignore Deno[Deno.internal].core
+Deno[Deno.internal].core.setNextTickCallback(() => console.log("nextTick"));
+// @ts-ignore Deno[Deno.internal].core
+Deno[Deno.internal].core.setHasTickScheduled(true);
 dispatchEvent(new CustomEvent("foo"));
 console.log(2);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_1.js b/cli/tests/testdata/run/ffi/unstable_ffi_1.js
index 8ca6c3a60..8ef77e71e 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_1.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_1.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_load({ path: "", symbols: {} });
+Deno[Deno.internal].core.ops.op_ffi_load({ path: "", symbols: {} });
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_10.js b/cli/tests/testdata/run/ffi/unstable_ffi_10.js
index 80ee896bd..da1c5b3a2 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_10.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_10.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_i16(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_i16(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_11.js b/cli/tests/testdata/run/ffi/unstable_ffi_11.js
index 6324a8fbd..c2d9213b4 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_11.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_11.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u32(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_u32(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_12.js b/cli/tests/testdata/run/ffi/unstable_ffi_12.js
index 7888684e9..d3aaa7a71 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_12.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_12.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_i32(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_i32(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_13.js b/cli/tests/testdata/run/ffi/unstable_ffi_13.js
index b9afff9de..859fbad60 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_13.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_13.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u64(0n, 0, new Uint32Array(2));
+Deno[Deno.internal].core.ops.op_ffi_read_u64(0n, 0, new Uint32Array(2));
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_14.js b/cli/tests/testdata/run/ffi/unstable_ffi_14.js
index b8c1bf5b5..19f8a48c8 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_14.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_14.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_f32(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_f32(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_15.js b/cli/tests/testdata/run/ffi/unstable_ffi_15.js
index 92242fe3f..3a4c0252b 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_15.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_15.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_f64(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_f64(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_2.js b/cli/tests/testdata/run/ffi/unstable_ffi_2.js
index 7f3f34f37..4ed91a9c2 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_2.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_2.js
@@ -1,4 +1,4 @@
-Deno.core.ops.op_ffi_call_ptr(0n, {
+Deno[Deno.internal].core.ops.op_ffi_call_ptr(0n, {
   name: null,
   parameters: [],
   result: "void",
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_3.js b/cli/tests/testdata/run/ffi/unstable_ffi_3.js
index a8f7f4180..284ecbc91 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_3.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_3.js
@@ -1,4 +1,4 @@
-Deno.core.opAsync("op_ffi_call_ptr_nonblocking", 0n, {
+Deno[Deno.internal].core.opAsync("op_ffi_call_ptr_nonblocking", 0n, {
   name: null,
   parameters: [],
   result: "void",
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_4.js b/cli/tests/testdata/run/ffi/unstable_ffi_4.js
index 150791233..c62905ead 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_4.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_4.js
@@ -1 +1,4 @@
-Deno.core.ops.op_ffi_ptr_of(new Uint8Array(0), new Uint32Array(2));
+Deno[Deno.internal].core.ops.op_ffi_ptr_of(
+  new Uint8Array(0),
+  new Uint32Array(2),
+);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_5.js b/cli/tests/testdata/run/ffi/unstable_ffi_5.js
index 9834a9a80..278c3c9d2 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_5.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_5.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_buf_copy_into(0n, 0, new Uint8Array(0), 0);
+Deno[Deno.internal].core.ops.op_ffi_buf_copy_into(0n, 0, new Uint8Array(0), 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_6.js b/cli/tests/testdata/run/ffi/unstable_ffi_6.js
index 0bd847f8c..e6add70d6 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_6.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_6.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_cstr_read(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_cstr_read(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_7.js b/cli/tests/testdata/run/ffi/unstable_ffi_7.js
index 143138a6a..6ba28b3e3 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_7.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_7.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u8(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_u8(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_8.js b/cli/tests/testdata/run/ffi/unstable_ffi_8.js
index 6b2d89a48..2b0e0343b 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_8.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_8.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_i8(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_i8(0n, 0);
diff --git a/cli/tests/testdata/run/ffi/unstable_ffi_9.js b/cli/tests/testdata/run/ffi/unstable_ffi_9.js
index 852e11f10..729a8584e 100644
--- a/cli/tests/testdata/run/ffi/unstable_ffi_9.js
+++ b/cli/tests/testdata/run/ffi/unstable_ffi_9.js
@@ -1 +1 @@
-Deno.core.ops.op_ffi_read_u16(0n, 0);
+Deno[Deno.internal].core.ops.op_ffi_read_u16(0n, 0);
diff --git a/cli/tests/testdata/run/finalization_registry.js b/cli/tests/testdata/run/finalization_registry.js
index dd3ea7671..dd2395085 100644
--- a/cli/tests/testdata/run/finalization_registry.js
+++ b/cli/tests/testdata/run/finalization_registry.js
@@ -8,7 +8,7 @@ function assertEquals(a, b) {
 
 const registry = new FinalizationRegistry((value) => {
   assertEquals(value, "called!");
-  Deno.core.print("FinalizationRegistry called!\n");
+  Deno[Deno.internal].core.print("FinalizationRegistry called!\n");
 });
 
 (function () {
diff --git a/cli/tests/testdata/run/op_exit_op_set_exit_code_in_worker.ts b/cli/tests/testdata/run/op_exit_op_set_exit_code_in_worker.ts
index b2ed912de..b6a776439 100644
--- a/cli/tests/testdata/run/op_exit_op_set_exit_code_in_worker.ts
+++ b/cli/tests/testdata/run/op_exit_op_set_exit_code_in_worker.ts
@@ -2,8 +2,8 @@
 // setting exit code in worker context is a no-op and is an alias for
 // `self.close()`.
 
-// @ts-ignore Deno.core doesn't have type-defs
-Deno.core.ops.op_set_exit_code(21);
+// @ts-ignore Deno[Deno.internal].core doesn't have type-defs
+Deno[Deno.internal].core.ops.op_set_exit_code(21);
 
 const worker = new Worker(
   import.meta.resolve("./op_exit_op_set_exit_code_worker.js"),
diff --git a/cli/tests/testdata/run/op_exit_op_set_exit_code_worker.js b/cli/tests/testdata/run/op_exit_op_set_exit_code_worker.js
index 3e6055747..9b284c37d 100644
--- a/cli/tests/testdata/run/op_exit_op_set_exit_code_worker.js
+++ b/cli/tests/testdata/run/op_exit_op_set_exit_code_worker.js
@@ -1,4 +1,4 @@
 self.onmessage = () => {
-  Deno.core.ops.op_set_exit_code(42);
+  Deno[Deno.internal].core.ops.op_set_exit_code(42);
   Deno.exit();
 };
diff --git a/cli/tests/testdata/run/set_exit_code_0.ts b/cli/tests/testdata/run/set_exit_code_0.ts
index 362a9f28a..8a0103c8f 100644
--- a/cli/tests/testdata/run/set_exit_code_0.ts
+++ b/cli/tests/testdata/run/set_exit_code_0.ts
@@ -1,2 +1,2 @@
-Deno.core.ops.op_set_exit_code(42);
+Deno[Deno.internal].core.ops.op_set_exit_code(42);
 Deno.exit(0); // Takes precedence.
diff --git a/cli/tests/testdata/run/set_exit_code_1.ts b/cli/tests/testdata/run/set_exit_code_1.ts
index b10863568..45027ccf7 100644
--- a/cli/tests/testdata/run/set_exit_code_1.ts
+++ b/cli/tests/testdata/run/set_exit_code_1.ts
@@ -1,2 +1,2 @@
-Deno.core.ops.op_set_exit_code(42);
+Deno[Deno.internal].core.ops.op_set_exit_code(42);
 Deno.exit();
diff --git a/cli/tests/testdata/run/set_exit_code_2.ts b/cli/tests/testdata/run/set_exit_code_2.ts
index d68812cae..48469c17d 100644
--- a/cli/tests/testdata/run/set_exit_code_2.ts
+++ b/cli/tests/testdata/run/set_exit_code_2.ts
@@ -1,2 +1,2 @@
-Deno.core.ops.op_set_exit_code(42);
+Deno[Deno.internal].core.ops.op_set_exit_code(42);
 // Exits naturally.
diff --git a/cli/tests/testdata/test/recursive_permissions_pledge.js b/cli/tests/testdata/test/recursive_permissions_pledge.js
index dbba96f26..9bf320c37 100644
--- a/cli/tests/testdata/test/recursive_permissions_pledge.js
+++ b/cli/tests/testdata/test/recursive_permissions_pledge.js
@@ -1,6 +1,6 @@
-Deno.core.ops.op_pledge_test_permissions(
+Deno[Deno.internal].core.ops.op_pledge_test_permissions(
   "none",
 );
-Deno.core.ops.op_pledge_test_permissions(
+Deno[Deno.internal].core.ops.op_pledge_test_permissions(
   "inherit",
 );
diff --git a/cli/tests/unit/globals_test.ts b/cli/tests/unit/globals_test.ts
index cf7293bba..c63b28973 100644
--- a/cli/tests/unit/globals_test.ts
+++ b/cli/tests/unit/globals_test.ts
@@ -71,12 +71,8 @@ Deno.test(function webAssemblyExists() {
   assert(typeof WebAssembly.compile === "function");
 });
 
-declare global {
-  namespace Deno {
-    // deno-lint-ignore no-explicit-any, no-var
-    var core: any;
-  }
-}
+// @ts-ignore This is not publicly typed namespace, but it's there for sure.
+const core = Deno[Deno.internal].core;
 
 Deno.test(function DenoNamespaceConfigurable() {
   const desc = Object.getOwnPropertyDescriptor(globalThis, "Deno");
@@ -86,19 +82,19 @@ Deno.test(function DenoNamespaceConfigurable() {
 });
 
 Deno.test(function DenoCoreNamespaceIsImmutable() {
-  const { print } = Deno.core;
+  const { print } = core;
   try {
-    Deno.core.print = 1;
+    core.print = 1;
   } catch {
     // pass
   }
-  assert(print === Deno.core.print);
+  assert(print === core.print);
   try {
-    delete Deno.core.print;
+    delete core.print;
   } catch {
     // pass
   }
-  assert(print === Deno.core.print);
+  assert(print === core.print);
 });
 
 Deno.test(async function windowQueueMicrotask() {
diff --git a/cli/tests/unit/metrics_test.ts b/cli/tests/unit/metrics_test.ts
index 5ada58b97..df2f1b2be 100644
--- a/cli/tests/unit/metrics_test.ts
+++ b/cli/tests/unit/metrics_test.ts
@@ -77,13 +77,15 @@ Deno.test(function metricsForOpCrates() {
   assert(m1.opsCompleted > 0);
 });
 
-// Test that op_names == Objects.keys(Deno.core.ops)
+// Test that op_names == Objects.keys(Deno[Deno.internal].core.ops)
 // since building the per-op metrics depends on op_names being complete
 Deno.test(function opNamesMatch() {
   assertEquals(
-    // @ts-ignore: Deno.core allowed
-    Deno.core.opNames().sort(),
-    // @ts-ignore: Deno.core allowed
-    Object.keys(Deno.core.ops).sort().filter((name) => name !== "asyncOpsInfo"),
+    // @ts-ignore: Deno[Deno.internal].core allowed
+    Deno[Deno.internal].core.opNames().sort(),
+    // @ts-ignore: Deno[Deno.internal].core allowed
+    Object.keys(Deno[Deno.internal].core.ops).sort().filter((name) =>
+      name !== "asyncOpsInfo"
+    ),
   );
 });
diff --git a/cli/tests/unit/opcall_test.ts b/cli/tests/unit/opcall_test.ts
index 61c3c8849..3f4f4472c 100644
--- a/cli/tests/unit/opcall_test.ts
+++ b/cli/tests/unit/opcall_test.ts
@@ -22,17 +22,13 @@ Deno.test(async function sendAsyncStackTrace() {
   }
 });
 
-declare global {
-  namespace Deno {
-    // deno-lint-ignore no-explicit-any, no-var
-    var core: any;
-  }
-}
+// @ts-ignore This is not publicly typed namespace, but it's there for sure.
+const core = Deno[Deno.internal].core;
 
 Deno.test(async function opsAsyncBadResource() {
   try {
     const nonExistingRid = 9999;
-    await Deno.core.read(
+    await core.read(
       nonExistingRid,
       new Uint8Array(0),
     );
@@ -46,7 +42,10 @@ Deno.test(async function opsAsyncBadResource() {
 Deno.test(function opsSyncBadResource() {
   try {
     const nonExistingRid = 9999;
-    Deno.core.ops.op_read_sync(nonExistingRid, new Uint8Array(0));
+    core.ops.op_read_sync(
+      nonExistingRid,
+      new Uint8Array(0),
+    );
   } catch (e) {
     if (!(e instanceof Deno.errors.BadResource)) {
       throw e;
diff --git a/cli/tests/unit/promise_hooks_test.ts b/cli/tests/unit/promise_hooks_test.ts
index cbdb6320a..a0883d4b5 100644
--- a/cli/tests/unit/promise_hooks_test.ts
+++ b/cli/tests/unit/promise_hooks_test.ts
@@ -12,8 +12,8 @@ function monitorPromises(outputArray: string[]) {
     return promiseIds.get(promise);
   }
 
-  // @ts-ignore: Deno.core allowed
-  Deno.core.setPromiseHooks(
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  Deno[Deno.internal].core.setPromiseHooks(
     (promise: Promise<unknown>, parentPromise?: Promise<unknown>) => {
       outputArray.push(
         `init ${identify(promise)}` +
diff --git a/cli/tests/unit/ref_unref_test.ts b/cli/tests/unit/ref_unref_test.ts
index 7ce72a170..eea93b165 100644
--- a/cli/tests/unit/ref_unref_test.ts
+++ b/cli/tests/unit/ref_unref_test.ts
@@ -4,7 +4,7 @@ import { assertNotEquals, execCode } from "./test_util.ts";
 
 Deno.test("[unrefOp] unref'ing invalid ops does not have effects", async () => {
   const [statusCode, _] = await execCode(`
-    Deno.core.unrefOp(-1);
+    Deno[Deno.internal].core.unrefOp(-1);
     setTimeout(() => { throw new Error() }, 10)
   `);
   // Invalid unrefOp call doesn't affect exit condition of event loop
diff --git a/cli/tests/unit/text_encoding_test.ts b/cli/tests/unit/text_encoding_test.ts
index 78e4267a9..940dd9f74 100644
--- a/cli/tests/unit/text_encoding_test.ts
+++ b/cli/tests/unit/text_encoding_test.ts
@@ -264,8 +264,8 @@ Deno.test(function textEncoderShouldCoerceToString() {
 });
 
 Deno.test(function binaryEncode() {
-  // @ts-ignore: Deno.core allowed
-  const ops = Deno.core.ops;
+  // @ts-ignore: Deno[Deno.internal].core allowed
+  const ops = Deno[Deno.internal].core.ops;
   function asBinaryString(bytes: Uint8Array): string {
     return Array.from(bytes).map(
       (v: number) => String.fromCodePoint(v),
diff --git a/cli/worker.rs b/cli/worker.rs
index b6ebd7930..591889ccd 100644
--- a/cli/worker.rs
+++ b/cli/worker.rs
@@ -186,7 +186,7 @@ impl CliMainWorker {
     if self.ps.options.trace_ops() {
       self.worker.js_runtime.execute_script(
         &located_script_name!(),
-        "Deno.core.enableOpCallTracing();",
+        "Deno[Deno.internal].core.enableOpCallTracing();",
       )?;
     }
 
@@ -231,7 +231,7 @@ impl CliMainWorker {
 
     self.worker.execute_script(
       &located_script_name!(),
-      "Deno.core.enableOpCallTracing();",
+      "Deno[Deno.internal].core.enableOpCallTracing();",
     )?;
 
     if mode != TestMode::Documentation {
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index ea519cb35..e1d089bc5 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -485,8 +485,14 @@ delete Intl.v8BreakIterator;
       },
     });
 
-    const finalDenoNs = {
+    // FIXME(bartlomieju): temporarily add whole `Deno.core` to
+    // `Deno[Deno.internal]` namespace. It should be removed and only necessary
+    // methods should be left there.
+    ObjectAssign(internals, {
       core,
+    });
+
+    const finalDenoNs = {
       internal: internalSymbol,
       [internalSymbol]: internals,
       resources: core.resources,
@@ -524,7 +530,6 @@ delete Intl.v8BreakIterator;
     // Setup `Deno` global - we're actually overriding already existing global
     // `Deno` with `Deno` namespace from "./deno.ts".
     ObjectDefineProperty(globalThis, "Deno", util.readOnly(finalDenoNs));
-    ObjectFreeze(globalThis.Deno.core);
 
     util.log("args", runtimeOptions.args);
   }
@@ -625,8 +630,14 @@ delete Intl.v8BreakIterator;
       },
     });
 
-    const finalDenoNs = {
+    // FIXME(bartlomieju): temporarily add whole `Deno.core` to
+    // `Deno[Deno.internal]` namespace. It should be removed and only necessary
+    // methods should be left there.
+    ObjectAssign(internals, {
       core,
+    });
+
+    const finalDenoNs = {
       internal: internalSymbol,
       [internalSymbol]: internals,
       resources: core.resources,
@@ -660,7 +671,6 @@ delete Intl.v8BreakIterator;
     // Setup `Deno` global - we're actually overriding already
     // existing global `Deno` with `Deno` namespace from "./deno.ts".
     ObjectDefineProperty(globalThis, "Deno", util.readOnly(finalDenoNs));
-    ObjectFreeze(globalThis.Deno.core);
   }
 
   ObjectDefineProperties(globalThis, {
diff --git a/test_napi/common.js b/test_napi/common.js
index 23f58c60c..915a43818 100644
--- a/test_napi/common.js
+++ b/test_napi/common.js
@@ -17,5 +17,5 @@ const [libPrefix, libSuffix] = {
 
 export function loadTestLibrary() {
   const specifier = `${targetDir}/${libPrefix}test_napi.${libSuffix}`;
-  return Deno.core.ops.op_napi_open(specifier); // Internal, used in ext/node
+  return Deno[Deno.internal].core.ops.op_napi_open(specifier); // Internal, used in ext/node
 }
diff --git a/tools/wpt/runner.ts b/tools/wpt/runner.ts
index ce6d41841..a3c22006a 100644
--- a/tools/wpt/runner.ts
+++ b/tools/wpt/runner.ts
@@ -185,9 +185,9 @@ async function generateBundle(location: URL): Promise<string> {
 
   return scriptContents.map(([url, contents]) => `
 (function() {
-  const [_,err] = Deno.core.evalContext(${JSON.stringify(contents)}, ${
-    JSON.stringify(url)
-  });
+  const [_,err] = Deno[Deno.internal].core.evalContext(${
+    JSON.stringify(contents)
+  }, ${JSON.stringify(url)});
   if (err !== null) {
     throw err?.thrown;
   }