diff --git a/CHANGELOG.prerelease.md b/CHANGELOG.prerelease.md
index bfd6341e7850..c10fb3b99635 100644
--- a/CHANGELOG.prerelease.md
+++ b/CHANGELOG.prerelease.md
@@ -1,3 +1,15 @@
+## 8.5.0-alpha.21
+
+- Addon A11y: Add typesVersions support for TypeScript definitions in a11y package - [#30005](https://github.com/storybookjs/storybook/pull/30005), thanks @valentinpalkovic!
+- Addon A11y: Refactor environment variable handling for Vitest integration - [#30022](https://github.com/storybookjs/storybook/pull/30022), thanks @valentinpalkovic!
+- Addon A11y: Run the a11y automigration on postInstall - [#30004](https://github.com/storybookjs/storybook/pull/30004), thanks @kasperpeulen!
+- Addon A11y: Update accessibility status handling in TestProviderRender - [#30027](https://github.com/storybookjs/storybook/pull/30027), thanks @valentinpalkovic!
+- Addon Onboarding: Prebundle react-confetti - [#29996](https://github.com/storybookjs/storybook/pull/29996), thanks @yannbf!
+- Addon Test: Correctly stop Storybook when Vitest closes - [#30012](https://github.com/storybookjs/storybook/pull/30012), thanks @JReinhold!
+- Addon Test: Show sub test provider toggle state in main testing module - [#30019](https://github.com/storybookjs/storybook/pull/30019), thanks @ghengeveld!
+- Addon Test: Wrap sub-paths exported with `require.resolve` - [#30026](https://github.com/storybookjs/storybook/pull/30026), thanks @ndelangen!
+- Core: Fix bundling of React - [#30003](https://github.com/storybookjs/storybook/pull/30003), thanks @yannbf!
+
 ## 8.5.0-alpha.20
 
 - Addon Test: Add `@vitest/coverage-v8` during postinstall if no coverage reporter is installed - [#29993](https://github.com/storybookjs/storybook/pull/29993), thanks @ghengeveld!
diff --git a/code/addons/a11y/package.json b/code/addons/a11y/package.json
index c84ecc818548..67e5942522ea 100644
--- a/code/addons/a11y/package.json
+++ b/code/addons/a11y/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-a11y",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Test component compliance with web accessibility standards",
   "keywords": [
     "a11y",
diff --git a/code/addons/actions/package.json b/code/addons/actions/package.json
index 45fc3815ec5f..7fbcf17f65ca 100644
--- a/code/addons/actions/package.json
+++ b/code/addons/actions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-actions",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Get UI feedback when an action is performed on an interactive element",
   "keywords": [
     "storybook",
diff --git a/code/addons/backgrounds/package.json b/code/addons/backgrounds/package.json
index ef24a496f8b3..eb5029e0cf4f 100644
--- a/code/addons/backgrounds/package.json
+++ b/code/addons/backgrounds/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-backgrounds",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Switch backgrounds to view components in different settings",
   "keywords": [
     "addon",
diff --git a/code/addons/controls/package.json b/code/addons/controls/package.json
index 0162f7ed1c0c..57f55867aab1 100644
--- a/code/addons/controls/package.json
+++ b/code/addons/controls/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-controls",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Interact with component inputs dynamically in the Storybook UI",
   "keywords": [
     "addon",
diff --git a/code/addons/docs/package.json b/code/addons/docs/package.json
index 2cb49f00af6e..e515eb363746 100644
--- a/code/addons/docs/package.json
+++ b/code/addons/docs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-docs",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Document component usage and properties in Markdown",
   "keywords": [
     "addon",
diff --git a/code/addons/essentials/package.json b/code/addons/essentials/package.json
index bb428b318872..a8b609df935b 100644
--- a/code/addons/essentials/package.json
+++ b/code/addons/essentials/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-essentials",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Curated addons to bring out the best of Storybook",
   "keywords": [
     "addon",
diff --git a/code/addons/gfm/package.json b/code/addons/gfm/package.json
index 95bd0aa7e641..050e23eee083 100644
--- a/code/addons/gfm/package.json
+++ b/code/addons/gfm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-mdx-gfm",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "GitHub Flavored Markdown in Storybook",
   "keywords": [
     "addon",
diff --git a/code/addons/highlight/package.json b/code/addons/highlight/package.json
index 00c3280e990a..132725309900 100644
--- a/code/addons/highlight/package.json
+++ b/code/addons/highlight/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-highlight",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Highlight DOM nodes within your stories",
   "keywords": [
     "storybook-addons",
diff --git a/code/addons/interactions/package.json b/code/addons/interactions/package.json
index 3891ce1ce740..94616d18d0b2 100644
--- a/code/addons/interactions/package.json
+++ b/code/addons/interactions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-interactions",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Automate, test and debug user interactions",
   "keywords": [
     "storybook-addons",
diff --git a/code/addons/jest/package.json b/code/addons/jest/package.json
index 158008a17bae..6cd0af1cf358 100644
--- a/code/addons/jest/package.json
+++ b/code/addons/jest/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-jest",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "React storybook addon that show component jest report",
   "keywords": [
     "addon",
diff --git a/code/addons/links/package.json b/code/addons/links/package.json
index 9acb23a278cc..400983200101 100644
--- a/code/addons/links/package.json
+++ b/code/addons/links/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-links",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Link stories together to build demos and prototypes with your UI components",
   "keywords": [
     "storybook-addons",
diff --git a/code/addons/measure/package.json b/code/addons/measure/package.json
index 12e162262346..c3dc010a7a79 100644
--- a/code/addons/measure/package.json
+++ b/code/addons/measure/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-measure",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Inspect layouts by visualizing the box model",
   "keywords": [
     "storybook-addons",
diff --git a/code/addons/onboarding/package.json b/code/addons/onboarding/package.json
index cf4769388699..da5be23da6de 100644
--- a/code/addons/onboarding/package.json
+++ b/code/addons/onboarding/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-onboarding",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook Addon Onboarding - Introduces a new onboarding experience",
   "keywords": [
     "storybook-addons",
diff --git a/code/addons/outline/package.json b/code/addons/outline/package.json
index b28d642cffa9..7a835eb493b4 100644
--- a/code/addons/outline/package.json
+++ b/code/addons/outline/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-outline",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Outline all elements with CSS to help with layout placement and alignment",
   "keywords": [
     "storybook-addons",
diff --git a/code/addons/storysource/package.json b/code/addons/storysource/package.json
index f5e0067ff5fd..edb6981d7fcf 100644
--- a/code/addons/storysource/package.json
+++ b/code/addons/storysource/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-storysource",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "View a story’s source code to see how it works and paste into your app",
   "keywords": [
     "addon",
diff --git a/code/addons/test/package.json b/code/addons/test/package.json
index 35a4077926e1..e74a870c875a 100644
--- a/code/addons/test/package.json
+++ b/code/addons/test/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/experimental-addon-test",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Integrate Vitest with Storybook",
   "keywords": [
     "storybook-addons",
diff --git a/code/addons/themes/package.json b/code/addons/themes/package.json
index 3acb32417fbd..30ac3cda924c 100644
--- a/code/addons/themes/package.json
+++ b/code/addons/themes/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-themes",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Switch between multiple themes for you components in Storybook",
   "keywords": [
     "css",
diff --git a/code/addons/toolbars/package.json b/code/addons/toolbars/package.json
index f4917fae862c..740f58f8ad96 100644
--- a/code/addons/toolbars/package.json
+++ b/code/addons/toolbars/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-toolbars",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Create your own toolbar items that control story rendering",
   "keywords": [
     "addon",
diff --git a/code/addons/viewport/package.json b/code/addons/viewport/package.json
index 2cad1d10517d..4202107ed176 100644
--- a/code/addons/viewport/package.json
+++ b/code/addons/viewport/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-viewport",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Build responsive components by adjusting Storybook’s viewport size and orientation",
   "keywords": [
     "addon",
diff --git a/code/builders/builder-vite/package.json b/code/builders/builder-vite/package.json
index 12c37e443cc2..856346cc86a2 100644
--- a/code/builders/builder-vite/package.json
+++ b/code/builders/builder-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/builder-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "A plugin to run and build Storybooks with Vite",
   "homepage": "https://github.com/storybookjs/storybook/tree/next/code/builders/builder-vite/#readme",
   "bugs": {
diff --git a/code/builders/builder-webpack5/package.json b/code/builders/builder-webpack5/package.json
index 31dc74add9ca..387b808ae269 100644
--- a/code/builders/builder-webpack5/package.json
+++ b/code/builders/builder-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/builder-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook framework-agnostic API",
   "keywords": [
     "storybook"
diff --git a/code/core/package.json b/code/core/package.json
index ac5c8991b31f..ff9c6c9b3c3f 100644
--- a/code/core/package.json
+++ b/code/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/core",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook framework-agnostic API",
   "keywords": [
     "storybook"
diff --git a/code/core/src/common/versions.ts b/code/core/src/common/versions.ts
index 766faaec02cf..ddc0f5d2ed67 100644
--- a/code/core/src/common/versions.ts
+++ b/code/core/src/common/versions.ts
@@ -1,88 +1,88 @@
 // auto generated file, do not edit
 export default {
-  '@storybook/addon-a11y': '8.5.0-alpha.20',
-  '@storybook/addon-actions': '8.5.0-alpha.20',
-  '@storybook/addon-backgrounds': '8.5.0-alpha.20',
-  '@storybook/addon-controls': '8.5.0-alpha.20',
-  '@storybook/addon-docs': '8.5.0-alpha.20',
-  '@storybook/addon-essentials': '8.5.0-alpha.20',
-  '@storybook/addon-mdx-gfm': '8.5.0-alpha.20',
-  '@storybook/addon-highlight': '8.5.0-alpha.20',
-  '@storybook/addon-interactions': '8.5.0-alpha.20',
-  '@storybook/addon-jest': '8.5.0-alpha.20',
-  '@storybook/addon-links': '8.5.0-alpha.20',
-  '@storybook/addon-measure': '8.5.0-alpha.20',
-  '@storybook/addon-onboarding': '8.5.0-alpha.20',
-  '@storybook/addon-outline': '8.5.0-alpha.20',
-  '@storybook/addon-storysource': '8.5.0-alpha.20',
-  '@storybook/experimental-addon-test': '8.5.0-alpha.20',
-  '@storybook/addon-themes': '8.5.0-alpha.20',
-  '@storybook/addon-toolbars': '8.5.0-alpha.20',
-  '@storybook/addon-viewport': '8.5.0-alpha.20',
-  '@storybook/builder-vite': '8.5.0-alpha.20',
-  '@storybook/builder-webpack5': '8.5.0-alpha.20',
-  '@storybook/core': '8.5.0-alpha.20',
-  '@storybook/builder-manager': '8.5.0-alpha.20',
-  '@storybook/channels': '8.5.0-alpha.20',
-  '@storybook/client-logger': '8.5.0-alpha.20',
-  '@storybook/components': '8.5.0-alpha.20',
-  '@storybook/core-common': '8.5.0-alpha.20',
-  '@storybook/core-events': '8.5.0-alpha.20',
-  '@storybook/core-server': '8.5.0-alpha.20',
-  '@storybook/csf-tools': '8.5.0-alpha.20',
-  '@storybook/docs-tools': '8.5.0-alpha.20',
-  '@storybook/manager': '8.5.0-alpha.20',
-  '@storybook/manager-api': '8.5.0-alpha.20',
-  '@storybook/node-logger': '8.5.0-alpha.20',
-  '@storybook/preview': '8.5.0-alpha.20',
-  '@storybook/preview-api': '8.5.0-alpha.20',
-  '@storybook/router': '8.5.0-alpha.20',
-  '@storybook/telemetry': '8.5.0-alpha.20',
-  '@storybook/theming': '8.5.0-alpha.20',
-  '@storybook/types': '8.5.0-alpha.20',
-  '@storybook/angular': '8.5.0-alpha.20',
-  '@storybook/ember': '8.5.0-alpha.20',
-  '@storybook/experimental-nextjs-vite': '8.5.0-alpha.20',
-  '@storybook/html-vite': '8.5.0-alpha.20',
-  '@storybook/html-webpack5': '8.5.0-alpha.20',
-  '@storybook/nextjs': '8.5.0-alpha.20',
-  '@storybook/preact-vite': '8.5.0-alpha.20',
-  '@storybook/preact-webpack5': '8.5.0-alpha.20',
-  '@storybook/react-native-web-vite': '8.5.0-alpha.20',
-  '@storybook/react-vite': '8.5.0-alpha.20',
-  '@storybook/react-webpack5': '8.5.0-alpha.20',
-  '@storybook/server-webpack5': '8.5.0-alpha.20',
-  '@storybook/svelte-vite': '8.5.0-alpha.20',
-  '@storybook/svelte-webpack5': '8.5.0-alpha.20',
-  '@storybook/sveltekit': '8.5.0-alpha.20',
-  '@storybook/vue3-vite': '8.5.0-alpha.20',
-  '@storybook/vue3-webpack5': '8.5.0-alpha.20',
-  '@storybook/web-components-vite': '8.5.0-alpha.20',
-  '@storybook/web-components-webpack5': '8.5.0-alpha.20',
-  '@storybook/blocks': '8.5.0-alpha.20',
-  storybook: '8.5.0-alpha.20',
-  sb: '8.5.0-alpha.20',
-  '@storybook/cli': '8.5.0-alpha.20',
-  '@storybook/codemod': '8.5.0-alpha.20',
-  '@storybook/core-webpack': '8.5.0-alpha.20',
-  'create-storybook': '8.5.0-alpha.20',
-  '@storybook/csf-plugin': '8.5.0-alpha.20',
-  '@storybook/instrumenter': '8.5.0-alpha.20',
-  '@storybook/react-dom-shim': '8.5.0-alpha.20',
-  '@storybook/source-loader': '8.5.0-alpha.20',
-  '@storybook/test': '8.5.0-alpha.20',
-  '@storybook/preset-create-react-app': '8.5.0-alpha.20',
-  '@storybook/preset-html-webpack': '8.5.0-alpha.20',
-  '@storybook/preset-preact-webpack': '8.5.0-alpha.20',
-  '@storybook/preset-react-webpack': '8.5.0-alpha.20',
-  '@storybook/preset-server-webpack': '8.5.0-alpha.20',
-  '@storybook/preset-svelte-webpack': '8.5.0-alpha.20',
-  '@storybook/preset-vue3-webpack': '8.5.0-alpha.20',
-  '@storybook/html': '8.5.0-alpha.20',
-  '@storybook/preact': '8.5.0-alpha.20',
-  '@storybook/react': '8.5.0-alpha.20',
-  '@storybook/server': '8.5.0-alpha.20',
-  '@storybook/svelte': '8.5.0-alpha.20',
-  '@storybook/vue3': '8.5.0-alpha.20',
-  '@storybook/web-components': '8.5.0-alpha.20',
+  '@storybook/addon-a11y': '8.5.0-alpha.21',
+  '@storybook/addon-actions': '8.5.0-alpha.21',
+  '@storybook/addon-backgrounds': '8.5.0-alpha.21',
+  '@storybook/addon-controls': '8.5.0-alpha.21',
+  '@storybook/addon-docs': '8.5.0-alpha.21',
+  '@storybook/addon-essentials': '8.5.0-alpha.21',
+  '@storybook/addon-mdx-gfm': '8.5.0-alpha.21',
+  '@storybook/addon-highlight': '8.5.0-alpha.21',
+  '@storybook/addon-interactions': '8.5.0-alpha.21',
+  '@storybook/addon-jest': '8.5.0-alpha.21',
+  '@storybook/addon-links': '8.5.0-alpha.21',
+  '@storybook/addon-measure': '8.5.0-alpha.21',
+  '@storybook/addon-onboarding': '8.5.0-alpha.21',
+  '@storybook/addon-outline': '8.5.0-alpha.21',
+  '@storybook/addon-storysource': '8.5.0-alpha.21',
+  '@storybook/experimental-addon-test': '8.5.0-alpha.21',
+  '@storybook/addon-themes': '8.5.0-alpha.21',
+  '@storybook/addon-toolbars': '8.5.0-alpha.21',
+  '@storybook/addon-viewport': '8.5.0-alpha.21',
+  '@storybook/builder-vite': '8.5.0-alpha.21',
+  '@storybook/builder-webpack5': '8.5.0-alpha.21',
+  '@storybook/core': '8.5.0-alpha.21',
+  '@storybook/builder-manager': '8.5.0-alpha.21',
+  '@storybook/channels': '8.5.0-alpha.21',
+  '@storybook/client-logger': '8.5.0-alpha.21',
+  '@storybook/components': '8.5.0-alpha.21',
+  '@storybook/core-common': '8.5.0-alpha.21',
+  '@storybook/core-events': '8.5.0-alpha.21',
+  '@storybook/core-server': '8.5.0-alpha.21',
+  '@storybook/csf-tools': '8.5.0-alpha.21',
+  '@storybook/docs-tools': '8.5.0-alpha.21',
+  '@storybook/manager': '8.5.0-alpha.21',
+  '@storybook/manager-api': '8.5.0-alpha.21',
+  '@storybook/node-logger': '8.5.0-alpha.21',
+  '@storybook/preview': '8.5.0-alpha.21',
+  '@storybook/preview-api': '8.5.0-alpha.21',
+  '@storybook/router': '8.5.0-alpha.21',
+  '@storybook/telemetry': '8.5.0-alpha.21',
+  '@storybook/theming': '8.5.0-alpha.21',
+  '@storybook/types': '8.5.0-alpha.21',
+  '@storybook/angular': '8.5.0-alpha.21',
+  '@storybook/ember': '8.5.0-alpha.21',
+  '@storybook/experimental-nextjs-vite': '8.5.0-alpha.21',
+  '@storybook/html-vite': '8.5.0-alpha.21',
+  '@storybook/html-webpack5': '8.5.0-alpha.21',
+  '@storybook/nextjs': '8.5.0-alpha.21',
+  '@storybook/preact-vite': '8.5.0-alpha.21',
+  '@storybook/preact-webpack5': '8.5.0-alpha.21',
+  '@storybook/react-native-web-vite': '8.5.0-alpha.21',
+  '@storybook/react-vite': '8.5.0-alpha.21',
+  '@storybook/react-webpack5': '8.5.0-alpha.21',
+  '@storybook/server-webpack5': '8.5.0-alpha.21',
+  '@storybook/svelte-vite': '8.5.0-alpha.21',
+  '@storybook/svelte-webpack5': '8.5.0-alpha.21',
+  '@storybook/sveltekit': '8.5.0-alpha.21',
+  '@storybook/vue3-vite': '8.5.0-alpha.21',
+  '@storybook/vue3-webpack5': '8.5.0-alpha.21',
+  '@storybook/web-components-vite': '8.5.0-alpha.21',
+  '@storybook/web-components-webpack5': '8.5.0-alpha.21',
+  '@storybook/blocks': '8.5.0-alpha.21',
+  storybook: '8.5.0-alpha.21',
+  sb: '8.5.0-alpha.21',
+  '@storybook/cli': '8.5.0-alpha.21',
+  '@storybook/codemod': '8.5.0-alpha.21',
+  '@storybook/core-webpack': '8.5.0-alpha.21',
+  'create-storybook': '8.5.0-alpha.21',
+  '@storybook/csf-plugin': '8.5.0-alpha.21',
+  '@storybook/instrumenter': '8.5.0-alpha.21',
+  '@storybook/react-dom-shim': '8.5.0-alpha.21',
+  '@storybook/source-loader': '8.5.0-alpha.21',
+  '@storybook/test': '8.5.0-alpha.21',
+  '@storybook/preset-create-react-app': '8.5.0-alpha.21',
+  '@storybook/preset-html-webpack': '8.5.0-alpha.21',
+  '@storybook/preset-preact-webpack': '8.5.0-alpha.21',
+  '@storybook/preset-react-webpack': '8.5.0-alpha.21',
+  '@storybook/preset-server-webpack': '8.5.0-alpha.21',
+  '@storybook/preset-svelte-webpack': '8.5.0-alpha.21',
+  '@storybook/preset-vue3-webpack': '8.5.0-alpha.21',
+  '@storybook/html': '8.5.0-alpha.21',
+  '@storybook/preact': '8.5.0-alpha.21',
+  '@storybook/react': '8.5.0-alpha.21',
+  '@storybook/server': '8.5.0-alpha.21',
+  '@storybook/svelte': '8.5.0-alpha.21',
+  '@storybook/vue3': '8.5.0-alpha.21',
+  '@storybook/web-components': '8.5.0-alpha.21',
 };
diff --git a/code/core/src/manager-api/version.ts b/code/core/src/manager-api/version.ts
index 0e6208fa11f8..0bba74f935f9 100644
--- a/code/core/src/manager-api/version.ts
+++ b/code/core/src/manager-api/version.ts
@@ -1 +1 @@
-export const version = '8.5.0-alpha.20';
+export const version = '8.5.0-alpha.21';
diff --git a/code/deprecated/builder-manager/package.json b/code/deprecated/builder-manager/package.json
index 62cda75bafd3..126dfe4c5815 100644
--- a/code/deprecated/builder-manager/package.json
+++ b/code/deprecated/builder-manager/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/builder-manager",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook manager builder",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/channels/package.json b/code/deprecated/channels/package.json
index f05e0f4b7459..6c31fd448d6a 100644
--- a/code/deprecated/channels/package.json
+++ b/code/deprecated/channels/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/channels",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/client-logger/package.json b/code/deprecated/client-logger/package.json
index d58ca7e64716..f32f09ca650a 100644
--- a/code/deprecated/client-logger/package.json
+++ b/code/deprecated/client-logger/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/client-logger",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/components/package.json b/code/deprecated/components/package.json
index 94f77c383899..2928619eb576 100644
--- a/code/deprecated/components/package.json
+++ b/code/deprecated/components/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/components",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Core Storybook Components",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/core-common/package.json b/code/deprecated/core-common/package.json
index 66994e0d8bdb..ea6f5f01af92 100644
--- a/code/deprecated/core-common/package.json
+++ b/code/deprecated/core-common/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/core-common",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook framework-agnostic API",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/core-events/package.json b/code/deprecated/core-events/package.json
index 3bb7a8fb597f..ec7a6f10d658 100644
--- a/code/deprecated/core-events/package.json
+++ b/code/deprecated/core-events/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/core-events",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Event names used in storybook core",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/core-server/package.json b/code/deprecated/core-server/package.json
index e2a34f4e8af6..9a9e140507e8 100644
--- a/code/deprecated/core-server/package.json
+++ b/code/deprecated/core-server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/core-server",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook framework-agnostic API",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/csf-tools/package.json b/code/deprecated/csf-tools/package.json
index 5c83ffcbb119..6e1a317e6aef 100644
--- a/code/deprecated/csf-tools/package.json
+++ b/code/deprecated/csf-tools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/csf-tools",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Parse and manipulate CSF and Storybook config files",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/docs-tools/package.json b/code/deprecated/docs-tools/package.json
index 1c98b0f0d3ec..8ca8d5eca235 100644
--- a/code/deprecated/docs-tools/package.json
+++ b/code/deprecated/docs-tools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/docs-tools",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Shared utility functions for frameworks to implement docs",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/manager-api/package.json b/code/deprecated/manager-api/package.json
index ba3117ca0233..8fa0294fa760 100644
--- a/code/deprecated/manager-api/package.json
+++ b/code/deprecated/manager-api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/manager-api",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Core Storybook Manager API & Context",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/manager/package.json b/code/deprecated/manager/package.json
index bb7eeb7188b8..d5df04c24258 100644
--- a/code/deprecated/manager/package.json
+++ b/code/deprecated/manager/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/manager",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Core Storybook UI",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/node-logger/package.json b/code/deprecated/node-logger/package.json
index b1700e6e65ca..67784935f5e5 100644
--- a/code/deprecated/node-logger/package.json
+++ b/code/deprecated/node-logger/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/node-logger",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/preview-api/package.json b/code/deprecated/preview-api/package.json
index 6c23642f7859..2995ec342e9a 100644
--- a/code/deprecated/preview-api/package.json
+++ b/code/deprecated/preview-api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preview-api",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/preview/package.json b/code/deprecated/preview/package.json
index 37550e11099f..27da2496c369 100644
--- a/code/deprecated/preview/package.json
+++ b/code/deprecated/preview/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preview",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/router/package.json b/code/deprecated/router/package.json
index 501562f1e6ea..7224c7ce0ce4 100644
--- a/code/deprecated/router/package.json
+++ b/code/deprecated/router/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/router",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Core Storybook Router",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/telemetry/package.json b/code/deprecated/telemetry/package.json
index 6fe8cd1b0ac4..fd7a105320d8 100644
--- a/code/deprecated/telemetry/package.json
+++ b/code/deprecated/telemetry/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/telemetry",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Telemetry logging for crash reports and usage statistics",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/theming/package.json b/code/deprecated/theming/package.json
index e91486a6bebc..db27fb520d9a 100644
--- a/code/deprecated/theming/package.json
+++ b/code/deprecated/theming/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/theming",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Core Storybook Components",
   "keywords": [
     "storybook"
diff --git a/code/deprecated/types/package.json b/code/deprecated/types/package.json
index 214340eddaa9..6d4a568f68b6 100644
--- a/code/deprecated/types/package.json
+++ b/code/deprecated/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/types",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Core Storybook TS Types",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/angular/package.json b/code/frameworks/angular/package.json
index 06a9b4834586..92eb88d21a34 100644
--- a/code/frameworks/angular/package.json
+++ b/code/frameworks/angular/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/angular",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Angular: Develop Angular components in isolation with hot reloading.",
   "keywords": [
     "storybook",
diff --git a/code/frameworks/ember/package.json b/code/frameworks/ember/package.json
index 18ff9618d203..13ce986ce29d 100644
--- a/code/frameworks/ember/package.json
+++ b/code/frameworks/ember/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/ember",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Ember: Develop Ember Component in isolation with Hot Reloading.",
   "homepage": "https://github.com/storybookjs/storybook/tree/next/code/frameworks/ember",
   "bugs": {
diff --git a/code/frameworks/experimental-nextjs-vite/package.json b/code/frameworks/experimental-nextjs-vite/package.json
index ff6ac5dafbf9..f5737d7c79f6 100644
--- a/code/frameworks/experimental-nextjs-vite/package.json
+++ b/code/frameworks/experimental-nextjs-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/experimental-nextjs-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Next.js and Vite",
   "keywords": [
     "storybook",
diff --git a/code/frameworks/html-vite/package.json b/code/frameworks/html-vite/package.json
index 02a11a32b867..4ebf99ebf5d1 100644
--- a/code/frameworks/html-vite/package.json
+++ b/code/frameworks/html-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/html-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for HTML and Vite: Develop HTML in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/html-webpack5/package.json b/code/frameworks/html-webpack5/package.json
index 356198becd23..98225ebcdc48 100644
--- a/code/frameworks/html-webpack5/package.json
+++ b/code/frameworks/html-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/html-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for HTML: View HTML snippets in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/nextjs/package.json b/code/frameworks/nextjs/package.json
index 88ccba6855a9..fb6f6a1d1f98 100644
--- a/code/frameworks/nextjs/package.json
+++ b/code/frameworks/nextjs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/nextjs",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Next.js",
   "keywords": [
     "storybook",
diff --git a/code/frameworks/preact-vite/package.json b/code/frameworks/preact-vite/package.json
index fb80969ea2a6..1687b02e0230 100644
--- a/code/frameworks/preact-vite/package.json
+++ b/code/frameworks/preact-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preact-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Preact and Vite: Develop Preact components in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/preact-webpack5/package.json b/code/frameworks/preact-webpack5/package.json
index 158b8645be84..17fc5dd05953 100644
--- a/code/frameworks/preact-webpack5/package.json
+++ b/code/frameworks/preact-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preact-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Preact: Develop Preact Component in isolation.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/react-native-web-vite/package.json b/code/frameworks/react-native-web-vite/package.json
index 4b6c1143687e..42847738ee1d 100644
--- a/code/frameworks/react-native-web-vite/package.json
+++ b/code/frameworks/react-native-web-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/react-native-web-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Develop react-native components an isolated web environment with hot reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/react-vite/package.json b/code/frameworks/react-vite/package.json
index 16deaec8d583..6d07c52bfac8 100644
--- a/code/frameworks/react-vite/package.json
+++ b/code/frameworks/react-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/react-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for React and Vite: Develop React components in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/react-webpack5/package.json b/code/frameworks/react-webpack5/package.json
index ff54c5fbe72c..bb74a3e7240a 100644
--- a/code/frameworks/react-webpack5/package.json
+++ b/code/frameworks/react-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/react-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for React: Develop React Component in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/server-webpack5/package.json b/code/frameworks/server-webpack5/package.json
index 728774d9db91..1de70d7f8b63 100644
--- a/code/frameworks/server-webpack5/package.json
+++ b/code/frameworks/server-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/server-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Server: View HTML snippets from a server in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/svelte-vite/package.json b/code/frameworks/svelte-vite/package.json
index 168c9fdfd5c3..83ffa79e2f8c 100644
--- a/code/frameworks/svelte-vite/package.json
+++ b/code/frameworks/svelte-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/svelte-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Svelte and Vite: Develop Svelte components in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/svelte-webpack5/package.json b/code/frameworks/svelte-webpack5/package.json
index ed6fbe94b336..065828177e41 100644
--- a/code/frameworks/svelte-webpack5/package.json
+++ b/code/frameworks/svelte-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/svelte-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Svelte: Develop Svelte Component in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/sveltekit/package.json b/code/frameworks/sveltekit/package.json
index fba6bdb225f6..69a794c5365a 100644
--- a/code/frameworks/sveltekit/package.json
+++ b/code/frameworks/sveltekit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/sveltekit",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for SvelteKit",
   "keywords": [
     "storybook",
diff --git a/code/frameworks/vue3-vite/package.json b/code/frameworks/vue3-vite/package.json
index 2f3ae021c76a..8e93d5775057 100644
--- a/code/frameworks/vue3-vite/package.json
+++ b/code/frameworks/vue3-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/vue3-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Vue3 and Vite: Develop Vue3 components in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/vue3-webpack5/package.json b/code/frameworks/vue3-webpack5/package.json
index 3100bb0b6289..f05663bad9c6 100644
--- a/code/frameworks/vue3-webpack5/package.json
+++ b/code/frameworks/vue3-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/vue3-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Vue 3: Develop Vue 3 Components in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/web-components-vite/package.json b/code/frameworks/web-components-vite/package.json
index 836c140ca82c..f367cc35ce05 100644
--- a/code/frameworks/web-components-vite/package.json
+++ b/code/frameworks/web-components-vite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/web-components-vite",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for web-components and Vite: Develop Web Components in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/frameworks/web-components-webpack5/package.json b/code/frameworks/web-components-webpack5/package.json
index 4d52e1e849e9..faa2b6763fa3 100644
--- a/code/frameworks/web-components-webpack5/package.json
+++ b/code/frameworks/web-components-webpack5/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/web-components-webpack5",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for web-components: View web components snippets in isolation with Hot Reloading.",
   "keywords": [
     "lit",
diff --git a/code/lib/blocks/package.json b/code/lib/blocks/package.json
index c38aa59f379c..430250ca9e3a 100644
--- a/code/lib/blocks/package.json
+++ b/code/lib/blocks/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/blocks",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook Doc Blocks",
   "keywords": [
     "storybook"
diff --git a/code/lib/cli-sb/package.json b/code/lib/cli-sb/package.json
index 9fb9cbcc6121..858eaee4fcd8 100644
--- a/code/lib/cli-sb/package.json
+++ b/code/lib/cli-sb/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sb",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook CLI",
   "keywords": [
     "storybook"
diff --git a/code/lib/cli-storybook/package.json b/code/lib/cli-storybook/package.json
index fd8411206ce2..5164fbf92187 100644
--- a/code/lib/cli-storybook/package.json
+++ b/code/lib/cli-storybook/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/cli",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook CLI",
   "keywords": [
     "storybook"
diff --git a/code/lib/cli/package.json b/code/lib/cli/package.json
index 8e7150357548..879f9fda1ed8 100644
--- a/code/lib/cli/package.json
+++ b/code/lib/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "storybook",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook's CLI - install, dev, build, upgrade, and more",
   "keywords": [
     "cli",
diff --git a/code/lib/codemod/package.json b/code/lib/codemod/package.json
index 4826ca8fc29f..d0075f450f7a 100644
--- a/code/lib/codemod/package.json
+++ b/code/lib/codemod/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/codemod",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "A collection of codemod scripts written with JSCodeshift",
   "keywords": [
     "storybook"
diff --git a/code/lib/core-webpack/package.json b/code/lib/core-webpack/package.json
index af5e0cb57a93..5ac62b95195c 100644
--- a/code/lib/core-webpack/package.json
+++ b/code/lib/core-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/core-webpack",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook framework-agnostic API",
   "keywords": [
     "storybook"
diff --git a/code/lib/create-storybook/package.json b/code/lib/create-storybook/package.json
index 9a05e6de9adb..984e9d7df530 100644
--- a/code/lib/create-storybook/package.json
+++ b/code/lib/create-storybook/package.json
@@ -1,6 +1,6 @@
 {
   "name": "create-storybook",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Initialize Storybook into your project",
   "homepage": "https://github.com/storybookjs/storybook/tree/next/code/lib/create-storybook",
   "bugs": {
diff --git a/code/lib/csf-plugin/package.json b/code/lib/csf-plugin/package.json
index 363ee09250f7..b05f5b11e303 100644
--- a/code/lib/csf-plugin/package.json
+++ b/code/lib/csf-plugin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/csf-plugin",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Enrich CSF files via static analysis",
   "keywords": [
     "storybook"
diff --git a/code/lib/instrumenter/package.json b/code/lib/instrumenter/package.json
index 559bcbad40c4..6c15c502a711 100644
--- a/code/lib/instrumenter/package.json
+++ b/code/lib/instrumenter/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/instrumenter",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/lib/react-dom-shim/package.json b/code/lib/react-dom-shim/package.json
index a25cbdb8c8ed..8a17e18920d3 100644
--- a/code/lib/react-dom-shim/package.json
+++ b/code/lib/react-dom-shim/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/react-dom-shim",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/lib/source-loader/package.json b/code/lib/source-loader/package.json
index 2de7c8411c93..c52a0f92894f 100644
--- a/code/lib/source-loader/package.json
+++ b/code/lib/source-loader/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/source-loader",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Source loader",
   "keywords": [
     "lib",
diff --git a/code/lib/test/package.json b/code/lib/test/package.json
index 792d88e03dd3..f142e3644729 100644
--- a/code/lib/test/package.json
+++ b/code/lib/test/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/test",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "",
   "keywords": [
     "storybook"
diff --git a/code/package.json b/code/package.json
index 35bc57478fb8..50f1604dc814 100644
--- a/code/package.json
+++ b/code/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/root",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "private": true,
   "description": "Storybook root",
   "homepage": "https://storybook.js.org/",
diff --git a/code/presets/create-react-app/package.json b/code/presets/create-react-app/package.json
index 6e6a149e7606..6affbff09691 100644
--- a/code/presets/create-react-app/package.json
+++ b/code/presets/create-react-app/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preset-create-react-app",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Create React App preset",
   "keywords": [
     "storybook"
diff --git a/code/presets/html-webpack/package.json b/code/presets/html-webpack/package.json
index 9ca2cb19ba36..7ae3edc465f6 100644
--- a/code/presets/html-webpack/package.json
+++ b/code/presets/html-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preset-html-webpack",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for HTML: View HTML snippets in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/presets/preact-webpack/package.json b/code/presets/preact-webpack/package.json
index 6442f22d7c2f..13c9c5badaf4 100644
--- a/code/presets/preact-webpack/package.json
+++ b/code/presets/preact-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preset-preact-webpack",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Preact: Develop Preact Component in isolation.",
   "keywords": [
     "storybook"
diff --git a/code/presets/react-webpack/package.json b/code/presets/react-webpack/package.json
index ecdae18620ff..acfe5f3ea4e1 100644
--- a/code/presets/react-webpack/package.json
+++ b/code/presets/react-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preset-react-webpack",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for React: Develop React Component in isolation with Hot Reloading",
   "keywords": [
     "storybook"
diff --git a/code/presets/server-webpack/package.json b/code/presets/server-webpack/package.json
index 275e323e0c90..a783568c9eff 100644
--- a/code/presets/server-webpack/package.json
+++ b/code/presets/server-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preset-server-webpack",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Server: View HTML snippets from a server in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/presets/svelte-webpack/package.json b/code/presets/svelte-webpack/package.json
index 668564406d78..6e4a595a9bb0 100644
--- a/code/presets/svelte-webpack/package.json
+++ b/code/presets/svelte-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preset-svelte-webpack",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Svelte: Develop Svelte Component in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/presets/vue3-webpack/package.json b/code/presets/vue3-webpack/package.json
index a2b686257fae..38d7ec940384 100644
--- a/code/presets/vue3-webpack/package.json
+++ b/code/presets/vue3-webpack/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preset-vue3-webpack",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook for Vue 3: Develop Vue 3 Components in isolation with Hot Reloading.",
   "keywords": [
     "storybook"
diff --git a/code/renderers/html/package.json b/code/renderers/html/package.json
index c127ef64950c..056a860d6dde 100644
--- a/code/renderers/html/package.json
+++ b/code/renderers/html/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/html",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook HTML renderer",
   "keywords": [
     "storybook"
diff --git a/code/renderers/preact/package.json b/code/renderers/preact/package.json
index 3005d5e0e57e..921291e4fd75 100644
--- a/code/renderers/preact/package.json
+++ b/code/renderers/preact/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/preact",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook Preact renderer",
   "keywords": [
     "storybook"
diff --git a/code/renderers/react/package.json b/code/renderers/react/package.json
index 6e2c8d94047e..968b2be5d175 100644
--- a/code/renderers/react/package.json
+++ b/code/renderers/react/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/react",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook React renderer",
   "keywords": [
     "storybook"
diff --git a/code/renderers/server/package.json b/code/renderers/server/package.json
index 1b5343e462c3..8f05da4f5759 100644
--- a/code/renderers/server/package.json
+++ b/code/renderers/server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/server",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook Server renderer",
   "keywords": [
     "storybook"
diff --git a/code/renderers/svelte/package.json b/code/renderers/svelte/package.json
index 4be74559a043..c8a221096ee9 100644
--- a/code/renderers/svelte/package.json
+++ b/code/renderers/svelte/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/svelte",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook Svelte renderer",
   "keywords": [
     "storybook"
diff --git a/code/renderers/vue3/package.json b/code/renderers/vue3/package.json
index 8b342d6c1af3..c57db46d9306 100644
--- a/code/renderers/vue3/package.json
+++ b/code/renderers/vue3/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/vue3",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook Vue 3 renderer",
   "keywords": [
     "storybook"
diff --git a/code/renderers/web-components/package.json b/code/renderers/web-components/package.json
index dee6febd448f..cfcdef31e344 100644
--- a/code/renderers/web-components/package.json
+++ b/code/renderers/web-components/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@storybook/web-components",
-  "version": "8.5.0-alpha.20",
+  "version": "8.5.0-alpha.21",
   "description": "Storybook web-components renderer",
   "keywords": [
     "lit",
diff --git a/docs/versions/next.json b/docs/versions/next.json
index 2406504741af..c38c2352087f 100644
--- a/docs/versions/next.json
+++ b/docs/versions/next.json
@@ -1 +1 @@
-{"version":"8.5.0-alpha.20","info":{"plain":"- Addon Test: Add `@vitest/coverage-v8` during postinstall if no coverage reporter is installed - [#29993](https://github.com/storybookjs/storybook/pull/29993), thanks @ghengeveld!\n- Addon Test: Add support for previewHead - [#29808](https://github.com/storybookjs/storybook/pull/29808), thanks @ndelangen!\n- Addon Test: Always run Vitest in watch mode internally - [#29749](https://github.com/storybookjs/storybook/pull/29749), thanks @JReinhold!\n- Addon Test: Filter out falsy test results in TestProviderRender - [#30001](https://github.com/storybookjs/storybook/pull/30001), thanks @valentinpalkovic!\n- Addon Test: Handle undefined storyId - [#29998](https://github.com/storybookjs/storybook/pull/29998), thanks @ghengeveld!\n- Addon Test: Make component tests status row link to the story's tests panel - [#29992](https://github.com/storybookjs/storybook/pull/29992), thanks @ghengeveld!\n- Addon Test: Merge viteFinal config into vitest config - [#29806](https://github.com/storybookjs/storybook/pull/29806), thanks @ndelangen!\n- Addon Test: Prompt switch to `experimental-nextjs-vite` - [#29814](https://github.com/storybookjs/storybook/pull/29814), thanks @ndelangen!\n- Addon Test: Use ProgressSpinner for stop button in Testing Module - [#29997](https://github.com/storybookjs/storybook/pull/29997), thanks @ghengeveld!"}}
+{"version":"8.5.0-alpha.21","info":{"plain":"- Addon A11y: Add typesVersions support for TypeScript definitions in a11y package - [#30005](https://github.com/storybookjs/storybook/pull/30005), thanks @valentinpalkovic!\n- Addon A11y: Refactor environment variable handling for Vitest integration - [#30022](https://github.com/storybookjs/storybook/pull/30022), thanks @valentinpalkovic!\n- Addon A11y: Run the a11y automigration on postInstall - [#30004](https://github.com/storybookjs/storybook/pull/30004), thanks @kasperpeulen!\n- Addon A11y: Update accessibility status handling in TestProviderRender - [#30027](https://github.com/storybookjs/storybook/pull/30027), thanks @valentinpalkovic!\n- Addon Onboarding: Prebundle react-confetti - [#29996](https://github.com/storybookjs/storybook/pull/29996), thanks @yannbf!\n- Addon Test: Correctly stop Storybook when Vitest closes - [#30012](https://github.com/storybookjs/storybook/pull/30012), thanks @JReinhold!\n- Addon Test: Show sub test provider toggle state in main testing module - [#30019](https://github.com/storybookjs/storybook/pull/30019), thanks @ghengeveld!\n- Addon Test: Wrap sub-paths exported with `require.resolve` - [#30026](https://github.com/storybookjs/storybook/pull/30026), thanks @ndelangen!\n- Core: Fix bundling of React - [#30003](https://github.com/storybookjs/storybook/pull/30003), thanks @yannbf!"}}