diff --git a/.changeset/sad-teams-end.md b/.changeset/sad-teams-end.md
new file mode 100644
index 000000000000..56e4d7e07d69
--- /dev/null
+++ b/.changeset/sad-teams-end.md
@@ -0,0 +1,5 @@
+---
+'astro': major
+---
+
+Deprecates exposed `astro:transitions` internals - ([v6 upgrade guidance](https://deploy-preview-12322--astro-docs-2.netlify.app/en/guides/upgrade-to/v6/#deprecated-exposed-astrotransitions-internals))
diff --git a/packages/astro/client.d.ts b/packages/astro/client.d.ts
index 43c263f9f1fa..ed13c5ac3fa4 100644
--- a/packages/astro/client.d.ts
+++ b/packages/astro/client.d.ts
@@ -1,8 +1,10 @@
 /// <reference types="vite/types/import-meta.d.ts" />
-/// <reference path="./types/content.d.ts" />
+
 /// <reference path="./types/actions.d.ts" />
+/// <reference path="./types/content.d.ts" />
 /// <reference path="./types/env.d.ts" />
 /// <reference path="./types/fonts.d.ts" />
+/// <reference path="./types/transitions.d.ts" />
 
 interface ImportMetaEnv {
 	// TODO: remove in Astro 7
@@ -119,46 +121,6 @@ declare module '*.svg' {
 	export default Component;
 }
 
-declare module 'astro:transitions' {
-	type TransitionModule = typeof import('./dist/virtual-modules/transitions.js');
-	export const slide: TransitionModule['slide'];
-	export const fade: TransitionModule['fade'];
-	export const createAnimationScope: TransitionModule['createAnimationScope'];
-
-	type ClientRouterModule = typeof import('./components/ClientRouter.astro');
-	export const ClientRouter: ClientRouterModule['default'];
-}
-
-declare module 'astro:transitions/client' {
-	type TransitionRouterModule = typeof import('./dist/virtual-modules/transitions-router.js');
-	export const navigate: TransitionRouterModule['navigate'];
-	export const supportsViewTransitions: TransitionRouterModule['supportsViewTransitions'];
-	export const getFallback: TransitionRouterModule['getFallback'];
-	export const transitionEnabledOnThisPage: TransitionRouterModule['transitionEnabledOnThisPage'];
-
-	export type Fallback = import('./dist/virtual-modules/transitions-types.js').Fallback;
-	export type Direction = import('./dist/virtual-modules/transitions-types.ts').Direction;
-	// biome-ignore format: bug
-	export type NavigationTypeString = import('./dist/virtual-modules/transitions-types.js').NavigationTypeString;
-	export type Options = import('./dist/virtual-modules/transitions-types.js').Options;
-
-	type EventModule = typeof import('./dist/virtual-modules/transitions-events.js');
-	export const TRANSITION_BEFORE_PREPARATION: EventModule['TRANSITION_BEFORE_PREPARATION'];
-	export const TRANSITION_AFTER_PREPARATION: EventModule['TRANSITION_AFTER_PREPARATION'];
-	export const TRANSITION_BEFORE_SWAP: EventModule['TRANSITION_BEFORE_SWAP'];
-	export const TRANSITION_AFTER_SWAP: EventModule['TRANSITION_AFTER_SWAP'];
-	export const TRANSITION_PAGE_LOAD: EventModule['TRANSITION_PAGE_LOAD'];
-	// biome-ignore format: bug
-	export type TransitionBeforePreparationEvent = import('./dist/virtual-modules/transitions-events.js').TransitionBeforePreparationEvent;
-	// biome-ignore format: bug
-	export type TransitionBeforeSwapEvent = import('./dist/virtual-modules/transitions-events.js').TransitionBeforeSwapEvent;
-	export const isTransitionBeforePreparationEvent: EventModule['isTransitionBeforePreparationEvent'];
-	export const isTransitionBeforeSwapEvent: EventModule['isTransitionBeforeSwapEvent'];
-	// biome-ignore format: bug
-	type TransitionSwapFunctionModule = typeof import('./dist/virtual-modules/transitions-swap-functions.js');
-	export const swapFunctions: TransitionSwapFunctionModule['swapFunctions'];
-}
-
 declare module 'astro:prefetch' {
 	export { prefetch, PrefetchOptions } from 'astro/virtual-modules/prefetch.js';
 }
diff --git a/packages/astro/src/runtime/server/transition.ts b/packages/astro/src/runtime/server/transition.ts
index d20e5816b038..21cf31faa9fd 100644
--- a/packages/astro/src/runtime/server/transition.ts
+++ b/packages/astro/src/runtime/server/transition.ts
@@ -115,6 +115,7 @@ export function renderTransition(
 	return scope;
 }
 
+/** @deprecated This will be removed in Astro 7 */
 export function createAnimationScope(
 	transitionName: string,
 	animations: Record<string, TransitionAnimationPair>,
diff --git a/packages/astro/src/transitions/events.ts b/packages/astro/src/transitions/events.ts
index 2d2b131cffeb..b4ef0c6d0a23 100644
--- a/packages/astro/src/transitions/events.ts
+++ b/packages/astro/src/transitions/events.ts
@@ -2,10 +2,15 @@ import { updateScrollPosition } from './router.js';
 import { swap } from './swap-functions.js';
 import type { Direction, NavigationTypeString } from './types.js';
 
+/** @deprecated This will be removed in Astro 7 */
 export const TRANSITION_BEFORE_PREPARATION = 'astro:before-preparation';
+/** @deprecated This will be removed in Astro 7 */
 export const TRANSITION_AFTER_PREPARATION = 'astro:after-preparation';
+/** @deprecated This will be removed in Astro 7 */
 export const TRANSITION_BEFORE_SWAP = 'astro:before-swap';
+/** @deprecated This will be removed in Astro 7 */
 export const TRANSITION_AFTER_SWAP = 'astro:after-swap';
+/** @deprecated This will be removed in Astro 7 */
 export const TRANSITION_PAGE_LOAD = 'astro:page-load';
 
 type Events =
@@ -67,6 +72,7 @@ class BeforeEvent extends Event {
  * TransitionBeforePreparationEvent
 
  */
+/** @deprecated This will be removed in Astro 7 */
 export const isTransitionBeforePreparationEvent = (
 	value: any,
 ): value is TransitionBeforePreparationEvent => value.type === TRANSITION_BEFORE_PREPARATION;
@@ -109,7 +115,7 @@ export class TransitionBeforePreparationEvent extends BeforeEvent {
 /*
  * TransitionBeforeSwapEvent
  */
-
+/** @deprecated This will be removed in Astro 7 */
 export const isTransitionBeforeSwapEvent = (value: any): value is TransitionBeforeSwapEvent =>
 	value.type === TRANSITION_BEFORE_SWAP;
 export class TransitionBeforeSwapEvent extends BeforeEvent {
diff --git a/packages/astro/src/transitions/router.ts b/packages/astro/src/transitions/router.ts
index faeb4b4fb8bd..028fed6affbd 100644
--- a/packages/astro/src/transitions/router.ts
+++ b/packages/astro/src/transitions/router.ts
@@ -1,6 +1,12 @@
 import { internalFetchHeaders } from 'virtual:astro:adapter-config/client';
 import type { TransitionBeforePreparationEvent } from './events.js';
-import { doPreparation, doSwap, TRANSITION_AFTER_SWAP } from './events.js';
+import {
+	doPreparation,
+	doSwap,
+	TRANSITION_AFTER_SWAP,
+	onPageLoad,
+	triggerEvent,
+} from './events.js';
 import { detectScriptExecuted } from './swap-functions.js';
 import type { Direction, Fallback, Options } from './types.js';
 
@@ -9,7 +15,6 @@ type State = {
 	scrollX: number;
 	scrollY: number;
 };
-type Events = 'astro:page-load' | 'astro:after-swap';
 type Navigation = { controller: AbortController };
 type Transition = {
 	// The view transitions object (API and simulation)
@@ -47,8 +52,6 @@ let mostRecentTransition: Transition | undefined;
 // This variable tells us where we came from
 let originalLocation: URL;
 
-const triggerEvent = (name: Events) => document.dispatchEvent(new Event(name));
-const onPageLoad = () => triggerEvent('astro:page-load');
 const announce = () => {
 	let div = document.createElement('div');
 	div.setAttribute('aria-live', 'assertive');
diff --git a/packages/astro/types/transitions.d.ts b/packages/astro/types/transitions.d.ts
new file mode 100644
index 000000000000..a5b3f20fa62f
--- /dev/null
+++ b/packages/astro/types/transitions.d.ts
@@ -0,0 +1,25 @@
+declare module 'astro:transitions' {
+	export * from 'astro/virtual-modules/transitions.js';
+	export { default as ClientRouter } from 'astro/components/ClientRouter.astro';
+}
+
+declare module 'astro:transitions/client' {
+	export {
+		navigate,
+		supportsViewTransitions,
+		transitionEnabledOnThisPage,
+	} from 'astro/virtual-modules/transitions-router.js';
+	export * from 'astro/virtual-modules/transitions-types.js';
+	export {
+		TRANSITION_BEFORE_PREPARATION,
+		isTransitionBeforePreparationEvent,
+		TransitionBeforePreparationEvent,
+		TRANSITION_AFTER_PREPARATION,
+		TRANSITION_BEFORE_SWAP,
+		isTransitionBeforeSwapEvent,
+		TransitionBeforeSwapEvent,
+		TRANSITION_AFTER_SWAP,
+		TRANSITION_PAGE_LOAD,
+	} from 'astro/virtual-modules/transitions-events.js';
+	export { swapFunctions } from 'astro/virtual-modules/transitions-swap-functions.js';
+}