From b39f2f0256c3754b1f2b708c97603db167965ed7 Mon Sep 17 00:00:00 2001
From: ella <ella@automattic.com>
Date: Thu, 27 Nov 2025 11:03:25 +0100
Subject: [PATCH 1/2] Private APIs: remove re-registration check

---
 packages/private-apis/src/implementation.ts | 34 ---------------------
 packages/private-apis/src/test/index.js     |  7 +----
 2 files changed, 1 insertion(+), 40 deletions(-)

diff --git a/packages/private-apis/src/implementation.ts b/packages/private-apis/src/implementation.ts
index 6b1e676df75b6c..f8179e8a1c1aa2 100644
--- a/packages/private-apis/src/implementation.ts
+++ b/packages/private-apis/src/implementation.ts
@@ -43,12 +43,6 @@ const CORE_MODULES_USING_PRIVATE_APIS = [
 	'@wordpress/global-styles-ui',
 ];
 
-/**
- * A list of core modules that already opted-in to
- * the privateApis package.
- */
-const registeredPrivateApis: Array< string > = [];
-
 /*
  * Warning for theme and plugin developers.
  *
@@ -66,9 +60,6 @@ const registeredPrivateApis: Array< string > = [];
 const requiredConsent =
 	'I acknowledge private features are not for use in themes or plugins and doing so will break in the next version of WordPress.';
 
-// The safety measure is meant for WordPress core where IS_WORDPRESS_CORE is set to true.
-const allowReRegistration = globalThis.IS_WORDPRESS_CORE ? false : true;
-
 /**
  * Called by a @wordpress package wishing to opt-in to accessing or exposing
  * private private APIs.
@@ -90,21 +81,6 @@ export const __dangerousOptInToUnstableAPIsOnlyForCoreModules = (
 				'your product will inevitably break on one of the next WordPress releases.'
 		);
 	}
-	if (
-		! allowReRegistration &&
-		registeredPrivateApis.includes( moduleName )
-	) {
-		// This check doesn't play well with Story Books / Hot Module Reloading
-		// and isn't included in the Gutenberg plugin. It only matters in the
-		// WordPress core release.
-		throw new Error(
-			`You tried to opt-in to unstable APIs as module "${ moduleName }" which is already registered. ` +
-				'This feature is only for JavaScript modules shipped with WordPress core. ' +
-				'Please do not use it in plugins and themes as the unstable APIs will be removed ' +
-				'without a warning. If you ignore this error and depend on unstable features, ' +
-				'your product will inevitably break on one of the next WordPress releases.'
-		);
-	}
 	if ( consent !== requiredConsent ) {
 		throw new Error(
 			`You tried to opt-in to unstable APIs without confirming you know the consequences. ` +
@@ -114,7 +90,6 @@ export const __dangerousOptInToUnstableAPIsOnlyForCoreModules = (
 				'your product will inevitably break on the next WordPress release.'
 		);
 	}
-	registeredPrivateApis.push( moduleName );
 
 	return {
 		lock,
@@ -225,12 +200,3 @@ export function resetAllowedCoreModules() {
 		CORE_MODULES_USING_PRIVATE_APIS.pop();
 	}
 }
-/**
- * Private function to allow the unit tests to reset
- * the list of registered private apis.
- */
-export function resetRegisteredPrivateApis() {
-	while ( registeredPrivateApis.length ) {
-		registeredPrivateApis.pop();
-	}
-}
diff --git a/packages/private-apis/src/test/index.js b/packages/private-apis/src/test/index.js
index 36e57ee58165d0..96e060b06af578 100644
--- a/packages/private-apis/src/test/index.js
+++ b/packages/private-apis/src/test/index.js
@@ -2,14 +2,9 @@
  * Internal dependencies
  */
 import { __dangerousOptInToUnstableAPIsOnlyForCoreModules } from '../';
-import {
-	resetRegisteredPrivateApis,
-	resetAllowedCoreModules,
-	allowCoreModule,
-} from '../implementation';
+import { resetAllowedCoreModules, allowCoreModule } from '../implementation';
 
 beforeEach( () => {
-	resetRegisteredPrivateApis();
 	resetAllowedCoreModules();
 	allowCoreModule( '@privateApis/test' );
 	allowCoreModule( '@privateApis/test-consumer' );

From f4bb8ed0fc9fb50ba939d46383fad074af8d30a4 Mon Sep 17 00:00:00 2001
From: Copilot <198982749+Copilot@users.noreply.github.com>
Date: Thu, 27 Nov 2025 12:35:27 +0100
Subject: [PATCH 2/2] Remove failing unit test for re-registration check

---
 packages/private-apis/src/test/index.js | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/packages/private-apis/src/test/index.js b/packages/private-apis/src/test/index.js
index 96e060b06af578..097ee042d5819d 100644
--- a/packages/private-apis/src/test/index.js
+++ b/packages/private-apis/src/test/index.js
@@ -32,18 +32,7 @@ describe( '__dangerousOptInToUnstableAPIsOnlyForCoreModules', () => {
 			/This feature is only for JavaScript modules shipped with WordPress core/
 		);
 	} );
-	it( 'Should not register the same module twice', () => {
-		expect( () => {
-			__dangerousOptInToUnstableAPIsOnlyForCoreModules(
-				requiredConsent,
-				'@privateApis/test'
-			);
-			__dangerousOptInToUnstableAPIsOnlyForCoreModules(
-				requiredConsent,
-				'@privateApis/test'
-			);
-		} ).toThrow( /is already registered/ );
-	} );
+
 	it( 'Should grant access to unstable APIs when passed both a consent string and a previously unregistered package name', () => {
 		const unstableAPIs = __dangerousOptInToUnstableAPIsOnlyForCoreModules(
 			requiredConsent,