diff --git a/package.json b/package.json
index 93ae65e54..ebc449ee2 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "ci:build": "yarn build all && yarn build:i18n && yarn build:ts && yarn build:docs && yarn test:imports",
     "test:imports": "node --test test/esm.test.js test/i18n.test.js test/ssr.test.js",
     "typecheck": "node scripts/typecheck.mjs",
-    "test:unit": "node --test test/playback.test.js test/dash-control.test.js test/public-behavior.test.js test/helpers.test.js test/chapter.test.js test/utils.test.js",
+    "test:unit": "node --test test/playback.test.js test/dash-control.test.js test/public-behavior.test.js test/helpers.test.js test/chapter.test.js test/utils.test.js test/resource-scope.test.js",
     "test": "yarn test:node && yarn test:baseline",
     "test:browser": "playwright test",
     "test:browser:install": "playwright install chromium firefox webkit",
diff --git a/packages/artplayer/ARCHITECTURE.md b/packages/artplayer/ARCHITECTURE.md
index 7a2f6ccb1..ce1492421 100644
--- a/packages/artplayer/ARCHITECTURE.md
+++ b/packages/artplayer/ARCHITECTURE.md
@@ -48,7 +48,50 @@ installed versions. Candidate corrections have separate published-defect observa
 in test/public-behavior.test.js and test/browser/emitter.spec.js. The source type fixture
 checks event name/payload correlation, receiver types, custom channels and chain typing.
 Emitter owns registrations only; instance teardown must remove the relevant callbacks,
-not clear unrelated subscribers before destroy dispatch. Resource scopes follow in CORE-03.
+not clear unrelated subscribers before destroy dispatch. Internal resource scopes are described below.
+
+## Internal resource ownership
+
+`src/lifecycle/scope.ts` owns synchronous cleanup registrations. `resources.ts` supplies
+DOM listener, timeout, animation frame, request-controller and Blob URL adapters;
+it depends only on the scope type and native browser APIs. Neither file is exported
+from Artplayer or Artplayer.utils. CORE-03 introduces and tests this boundary;
+CORE-04 will connect instance construction/destruction. Existing Events, timers and
+requests have not yet been transferred, so their historical lifecycle findings remain open.
+
+Create one ResourceScope for an owner and child() for a replaceable operation.
+Call operation.dispose() on completion or replacement; it detaches from its parent,
+while sibling operations stay live. Disposing an instance closes all remaining
+children. add(cleanup) returns an idempotent release function. Registrations are removed
+before invoking cleanup; disposal closes the scope first and unwinds in reverse order.
+Late registrations are released immediately. Failures do not interrupt other cleanup:
+dispose throws one ResourceCleanupError containing the original errors after unwinding.
+Explicit release throws its own error immediately and is still consumed. Owners must
+handle these errors at their lifecycle boundary without replacing a primary operation error.
+
+Cleanup returns undefined, deliberately rejecting async callbacks in strict TS. An
+asynchronous media/SDK shutdown needs a separately awaited owner protocol; do not cast
+its Promise to a synchronous disposer. Emitter subscriptions use a per-owner callback
+and add(() => { emitter.off(name, callback) }); do not remove unrelated subscriptions.
+
+DOM adapters preserve function receivers and object handleEvent receivers, snapshot
+capture, and release once/aborted subscriptions. They are internal registrations with
+their own wrappers, not a replacement for the public Events.proxy identity contract.
+Timer/RAF callbacks detach before invoking work and guard queued callbacks after
+cancellation. They allocate nothing when closed. Request controllers are optional on
+engines lacking AbortController: consumers still need closed/generation checks and
+must own rejected fetch Promises. Release a completed request's operation scope to
+avoid retaining its controller. objectURL only accepts a Blob it creates a URL for;
+it never adopts a caller URL. A closed scope immediately revokes the newly created URL.
+
+Run `yarn test:unit` and `yarn typecheck` for scope failures, reentry, ownership,
+controlled timers, queued RAF and type rejection cases. `resource-scope.spec.js` runs
+an explicitly identified es2015 internal-source fixture in all three Playwright
+engines with native DOM, RAF, timers, fetch abort and URL access. It is not evidence
+that the player has adopted scopes or that an installed tarball exposes this API.
+Fresh fetches test URL revocation; decoded image caches are not a reliable revocation
+oracle. Keep adapter tests and owner integration tests separate and extend both when
+moving an existing resource into this boundary.
 
 ## Observable utility behavior
 
diff --git a/packages/artplayer/src/lifecycle/resources.ts b/packages/artplayer/src/lifecycle/resources.ts
new file mode 100644
index 000000000..5088f590b
--- /dev/null
+++ b/packages/artplayer/src/lifecycle/resources.ts
@@ -0,0 +1,85 @@
+import type ResourceScope from './scope'
+
+export function listen(scope: ResourceScope, target: EventTarget, name: string, callback: EventListenerOrEventListenerObject, options: AddEventListenerOptions = {}): () => void {
+  const { capture = false, once = false, signal } = options
+  if (scope.closed || signal?.aborted)
+    return () => {}
+  let release = () => {}
+  function listener(this: EventTarget, event: Event) {
+    if (once)
+      release()
+    if (scope.closed)
+      return
+    if (typeof callback === 'function')
+      callback.call(this, event)
+    else
+      callback.handleEvent(event)
+  }
+  target.addEventListener(name, listener, options)
+  release = scope.add(() => {
+    try {
+      target.removeEventListener(name, listener, capture)
+    }
+    finally {
+      signal?.removeEventListener('abort', release)
+    }
+  })
+  signal?.addEventListener('abort', release, { once: true })
+  return release
+}
+
+export function timeout(scope: ResourceScope, callback: () => void, delay: number): () => void {
+  if (scope.closed)
+    return () => {}
+  let pending = true
+  let release = () => {}
+  const timer = setTimeout(() => {
+    if (!pending)
+      return
+    release()
+    if (!scope.closed)
+      callback()
+  }, delay)
+  release = scope.add(() => {
+    pending = false
+    clearTimeout(timer)
+  })
+  return release
+}
+
+export function animationFrame(scope: ResourceScope, callback: FrameRequestCallback): () => void {
+  if (scope.closed)
+    return () => {}
+  let pending = true
+  let release = () => {}
+  const frame = requestAnimationFrame((time) => {
+    if (!pending)
+      return
+    release()
+    if (!scope.closed)
+      callback(time)
+  })
+  release = scope.add(() => {
+    pending = false
+    cancelAnimationFrame(frame)
+  })
+  return release
+}
+
+export function requestController(scope: ResourceScope): AbortController | undefined {
+  if (typeof AbortController === 'undefined')
+    return undefined
+  const controller = new AbortController()
+  scope.add(() => {
+    controller.abort()
+  })
+  return controller
+}
+
+export function objectURL(scope: ResourceScope, blob: Blob): string {
+  const url = URL.createObjectURL(blob)
+  scope.add(() => {
+    URL.revokeObjectURL(url)
+  })
+  return url
+}
diff --git a/packages/artplayer/src/lifecycle/scope.ts b/packages/artplayer/src/lifecycle/scope.ts
new file mode 100644
index 000000000..ca7b9caef
--- /dev/null
+++ b/packages/artplayer/src/lifecycle/scope.ts
@@ -0,0 +1,65 @@
+export type Cleanup = () => undefined
+
+export class ResourceCleanupError extends Error {
+  constructor(readonly errors: unknown[]) {
+    super('Failed to release ArtPlayer resources')
+    this.name = 'ResourceCleanupError'
+  }
+}
+
+export default class ResourceScope {
+  private cleanups = new Set<() => void>()
+  private disposed = false
+
+  get closed(): boolean {
+    return this.disposed
+  }
+
+  add(cleanup: Cleanup): () => void {
+    let active = true
+    const release = () => {
+      if (!active)
+        return
+      active = false
+      this.cleanups.delete(release)
+      cleanup()
+    }
+    if (this.closed)
+      release()
+    else
+      this.cleanups.add(release)
+    return release
+  }
+
+  child(): ResourceScope {
+    const child = new ResourceScope()
+    const release = this.add(() => {
+      child.dispose()
+    })
+    child.add(() => {
+      release()
+    })
+    return child
+  }
+
+  dispose(): void {
+    if (this.closed)
+      return
+    this.disposed = true
+    const errors: unknown[] = []
+    // Unwind dependencies; release removes each registration before invoking it.
+    for (const release of Array.from(this.cleanups).reverse()) {
+      try {
+        release()
+      }
+      catch (error) {
+        if (error instanceof ResourceCleanupError)
+          errors.push(...error.errors)
+        else
+          errors.push(error)
+      }
+    }
+    if (errors.length)
+      throw new ResourceCleanupError(errors)
+  }
+}
diff --git a/refactor/baselines/resource-scope-validation.json b/refactor/baselines/resource-scope-validation.json
new file mode 100644
index 000000000..4b87cb7f2
--- /dev/null
+++ b/refactor/baselines/resource-scope-validation.json
@@ -0,0 +1,692 @@
+{
+  "task": "CORE-03",
+  "date": "2026-09-11",
+  "node": "v24.21.0",
+  "parentCommit": "362c6169987bb32c120e81ea267eeaa3bd8f63b8",
+  "source": {
+    "packages/artplayer/src/lifecycle/scope.ts": "e2188e8544b27cf8c7ac149e7146af628a2d6166c82b719a247adef5d85be5db",
+    "packages/artplayer/src/lifecycle/resources.ts": "2ff9cb71035ac5694c92a6b01f7454890bd652ba4b7774e8973500de7f7d204c",
+    "test/resource-scope.test.js": "f1b5bfb3fd863bee9493a26152aad6d110d47a8fc1f369da7e94c57d0538a123",
+    "test/types/resource-scope.ts": "a8c056914e8529c871891ed672030248d359a19f8571a5ac5a5f18952ea5def0",
+    "test/browser/resource-scope.spec.js": "0196bd9943c1ce2f6560f87156cd0de47606579c1a736bd46d4943179a121d3f"
+  },
+  "ci": {
+    "command": "yarn ci:check",
+    "passed": 94,
+    "unit": 66,
+    "engineering": 4,
+    "baseline": 24,
+    "sourceTypes": 15,
+    "logSha256": "e4982bd5055665e0bb40dc41c2c1ba319a935bff22ef6565ad102c4403ce09b6"
+  },
+  "build": {
+    "commands": [
+      "yarn build artplayer",
+      "yarn build:i18n"
+    ],
+    "generatedGitDifference": false,
+    "logs": [
+      {
+        "file": "core03-build.log",
+        "sha256": "21ffc4ba5064d496a5c5da4a3f5eaebe9bb6de240fdb44938f2858120e52d934"
+      },
+      {
+        "file": "core03-i18n.log",
+        "sha256": "4b5a3b6f03affadff34eb605405c16cad36f9fb9c7b61e54a446148140048490"
+      }
+    ]
+  },
+  "browser": {
+    "command": "yarn test:browser",
+    "candidateKind": "workspace-build",
+    "internalFixtureKind": "internal-source-fixture",
+    "stats": {
+      "startTime": "2026-09-10T16:19:36.559Z",
+      "duration": 28138.681,
+      "expected": 78,
+      "skipped": 0,
+      "unexpected": 0,
+      "flaky": 0
+    },
+    "internal": [
+      {
+        "engine": "chromium",
+        "version": "153.0.8010.12",
+        "platform": "win32",
+        "fixture": {
+          "kind": "internal-source-fixture",
+          "target": "es2015",
+          "sha256": "032ba327c57b8d94d005558c64bc153dfb2e1d6fcb80cf50adca0ae5cdd7f471"
+        },
+        "pageErrors": [],
+        "controlledConsole": [
+          "Failed to load resource: net::ERR_FILE_NOT_FOUND"
+        ],
+        "controlledFailedRequests": [
+          {
+            "url": "http://127.0.0.1:8084/test/pattern.mp4",
+            "resourceType": "fetch",
+            "failure": {
+              "errorText": "net::ERR_ABORTED"
+            }
+          },
+          {
+            "url": "blob:http://127.0.0.1:8084/bb671d68-fcc1-4374-ac45-06ea586b13fd",
+            "resourceType": "fetch",
+            "failure": {
+              "errorText": "net::ERR_FILE_NOT_FOUND"
+            }
+          }
+        ]
+      },
+      {
+        "engine": "firefox",
+        "version": "155.0",
+        "platform": "win32",
+        "fixture": {
+          "kind": "internal-source-fixture",
+          "target": "es2015",
+          "sha256": "032ba327c57b8d94d005558c64bc153dfb2e1d6fcb80cf50adca0ae5cdd7f471"
+        },
+        "pageErrors": [],
+        "controlledConsole": [],
+        "controlledFailedRequests": []
+      },
+      {
+        "engine": "webkit",
+        "version": "26.6",
+        "platform": "win32",
+        "fixture": {
+          "kind": "internal-source-fixture",
+          "target": "es2015",
+          "sha256": "032ba327c57b8d94d005558c64bc153dfb2e1d6fcb80cf50adca0ae5cdd7f471"
+        },
+        "pageErrors": [],
+        "controlledConsole": [
+          "Failed to load resource"
+        ],
+        "controlledFailedRequests": [
+          {
+            "url": "http://127.0.0.1:8084/test/pattern.mp4",
+            "resourceType": "fetch",
+            "failure": {
+              "errorText": "Load request cancelled"
+            }
+          },
+          {
+            "url": "blob:http://127.0.0.1:8084/884f53c0-917f-4730-be3f-32b8f0d5e2b8",
+            "resourceType": "fetch",
+            "failure": null
+          }
+        ]
+      }
+    ],
+    "cases": [
+      {
+        "file": "chapter.spec.js",
+        "title": "published-only observations: blank title, NaN and once-only metadata are historical defects",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate clears titles on blank chapters, zero hover and replacement",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate rejects NaN and can recover after an invalid update",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate releases only its listeners and DOM across multiple instances and early destruction",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate ignores pending metadata initialization after immediate destroy",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate deduplicates stylesheet injection while the document is loading",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "published-only observations: blank title, NaN and once-only metadata are historical defects",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate clears titles on blank chapters, zero hover and replacement",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate rejects NaN and can recover after an invalid update",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate releases only its listeners and DOM across multiple instances and early destruction",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate ignores pending metadata initialization after immediate destroy",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate deduplicates stylesheet injection while the document is loading",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "published-only observations: blank title, NaN and once-only metadata are historical defects",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate clears titles on blank chapters, zero hover and replacement",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate rejects NaN and can recover after an invalid update",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate releases only its listeners and DOM across multiple instances and early destruction",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate ignores pending metadata initialization after immediate destroy",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "candidate deduplicates stylesheet injection while the document is loading",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "factory, registration, input normalization and safe title text",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "progress bars, real hover, title edges and boundary seek",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "sync update, Infinity, object identity, empty lists and invalid data",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "explicit source update and core-owned destruction",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "factory, registration, input normalization and safe title text",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "progress bars, real hover, title edges and boundary seek",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "sync update, Infinity, object identity, empty lists and invalid data",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "explicit source update and core-owned destruction",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "factory, registration, input normalization and safe title text",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "progress bars, real hover, title edges and boundary seek",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "sync update, Infinity, object identity, empty lists and invalid data",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "explicit source update and core-owned destruction",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "factory, registration, input normalization and safe title text",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "progress bars, real hover, title edges and boundary seek",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "sync update, Infinity, object identity, empty lists and invalid data",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "explicit source update and core-owned destruction",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "factory, registration, input normalization and safe title text",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "progress bars, real hover, title edges and boundary seek",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "sync update, Infinity, object identity, empty lists and invalid data",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "explicit source update and core-owned destruction",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "factory, registration, input normalization and safe title text",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "progress bars, real hover, title edges and boundary seek",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "sync update, Infinity, object identity, empty lists and invalid data",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "chapter.spec.js",
+        "title": "explicit source update and core-owned destruction",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "emitter.spec.js",
+        "title": "published: emitter event names and once across nested dispatch",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "emitter.spec.js",
+        "title": "candidate: emitter event names and once across nested dispatch",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "emitter.spec.js",
+        "title": "published: emitter event names and once across nested dispatch",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "emitter.spec.js",
+        "title": "candidate: emitter event names and once across nested dispatch",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "emitter.spec.js",
+        "title": "published: emitter event names and once across nested dispatch",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "emitter.spec.js",
+        "title": "candidate: emitter event names and once across nested dispatch",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "published: real playback, pause, seek, switch and destroy",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "candidate: real playback, pause, seek, switch and destroy",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "controlled HTTP media failure emits a real video error",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "Range, media identity and docs candidate routes",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "published: real playback, pause, seek, switch and destroy",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "candidate: real playback, pause, seek, switch and destroy",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "controlled HTTP media failure emits a real video error",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "Range, media identity and docs candidate routes",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "published: real playback, pause, seek, switch and destroy",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "candidate: real playback, pause, seek, switch and destroy",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "controlled HTTP media failure emits a real video error",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "playback.spec.js",
+        "title": "Range, media identity and docs candidate routes",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "resource-scope.spec.js",
+        "title": "internal resource scope: native DOM, RAF, timer, fetch abort and URL release",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "resource-scope.spec.js",
+        "title": "internal resource scope: native DOM, RAF, timer, fetch abort and URL release",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "resource-scope.spec.js",
+        "title": "internal resource scope: native DOM, RAF, timer, fetch abort and URL release",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "published: subtitle object URL contains real VTT data",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "published: download starts and removes its temporary anchor",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate: subtitle object URL contains real VTT data",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate: download starts and removes its temporary anchor",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate download releases the anchor even when click fails",
+        "engine": "chromium",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "published: subtitle object URL contains real VTT data",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "published: download starts and removes its temporary anchor",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate: subtitle object URL contains real VTT data",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate: download starts and removes its temporary anchor",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate download releases the anchor even when click fails",
+        "engine": "firefox",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "published: subtitle object URL contains real VTT data",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "published: download starts and removes its temporary anchor",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate: subtitle object URL contains real VTT data",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate: download starts and removes its temporary anchor",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      },
+      {
+        "file": "utils.spec.js",
+        "title": "candidate download releases the anchor even when click fails",
+        "engine": "webkit",
+        "status": "passed",
+        "retry": 0
+      }
+    ]
+  },
+  "firstFailure": {
+    "stats": {
+      "startTime": "2026-09-10T16:15:26.658Z",
+      "duration": 33097.064,
+      "expected": 77,
+      "skipped": 0,
+      "unexpected": 1,
+      "flaky": 0
+    },
+    "engine": "firefox",
+    "assertion": "revokedRejected expected true, received false using an already decoded image",
+    "resolution": "Replace image decoding with fresh fetch before and after revocation; assert exact TypeError. Also abort an in-flight native fetch.",
+    "reportSha256": "8e2bbafe70e81957f37501901957598b3a88d4e5f272dcdaaedb56839f59118a"
+  },
+  "limits": [
+    "No player constructor/destroy integration until CORE-04",
+    "No package install rerun for this currently unreferenced internal module",
+    "No remote CI, device or SDK validation in this task"
+  ]
+}
diff --git a/refactor/changes/2026-09-11-CORE-03-resource-scope.md b/refactor/changes/2026-09-11-CORE-03-resource-scope.md
new file mode 100644
index 000000000..a24408bf1
--- /dev/null
+++ b/refactor/changes/2026-09-11-CORE-03-resource-scope.md
@@ -0,0 +1,47 @@
+# CORE-03：内部资源作用域
+
+## 结构与契约
+
+新增核心 lifecycle/scope.ts 与 resources.ts：前者管理同步清理、父子作用域及异常汇总；
+后者封装 DOM 监听、定时器、RAF、AbortController 与自有 Blob URL。没有新依赖，
+没有把内部能力导出到 Artplayer/utils 或要求旧插件依赖它。
+
+实例可持有长期 scope，切源、字幕请求等单次操作使用 child。子作用域结束会脱离父登记，
+不会释放兄弟操作。清理先关闭作用域，再逆序释放；释放登记在调用前移除，重复和重入安全。
+单项失败不中断其他清理，最后统一抛出 ResourceCleanupError 并保留原始错误。
+显式 release 的错误直接传播，该登记仍只消费一次；后续所有者需在生命周期边界处理。
+
+Cleanup 的返回类型为 undefined，严格拒绝 async/Promise 清理，避免同步 destroy 丢失异步失败。
+异步媒体/SDK 关闭将由对应包明确等待，不伪装成同步回收。Emitter 订阅用独立 callback 加入
+scope，并通过原 off API 释放；实例和操作各自只清理拥有的资源。
+
+监听保留函数/对象接收者、固定 capture、处理 once 重入和外部 abort；计时器/RAF 完成后脱离
+登记，取消后即使已排队的回调被调用也不会工作。缺少 AbortController 时返回 undefined，
+请求所有者必须继续防止过期回调。Blob URL 只释放本 helper 创建的 URL，不接管用户传入 URL。
+
+对应 API-04/05/07/10：这是内部边界建立，不改变现有公开行为。CORE-04 才接入播放器的
+构造/销毁；当前 Events、历史 timer/request 尚未迁移，BASE-LIFE-04/05 与 BASE-PERF-01
+继续开放，不能把本任务的 scope 测试写成播放器泄漏已修复。
+
+## 验证与维护
+
+- test:unit 加入 resource-scope.test.js，共九项资源测试：异常汇总、重入、late add、
+  子作用域脱离、独立释放失败、订阅归属、受控 timer、已排队 RAF、DOM/abort/URL 与能力缺失。
+- test/types/resource-scope.ts 含四个必须拒绝的类型用例；全部严格源类型和消费者检查通过。
+- yarn ci:check：66 项单元、4 项工程、24 项冻结基线，共 94 项通过，无跳过。
+- 三浏览器 78 项通过；其中 3 项通过明确标注的 es2015 内部源码 fixture 验证原生 DOM、
+  RAF、timer、进行中的 fetch 取消和 Blob URL 撤销。其余为既有发布/工作区播放与插件回归。
+  源码 fixture 不冒充安装 tarball；内部代码尚未由公开入口引用。
+- 负向控制只允许本 case 的精确 URL、fetch 类型及已观察的引擎错误；其他网络错误不被忽略。
+- yarn build artplayer 与 yarn build:i18n 通过，生成产物无 Git 差异。本次未重复执行安装打包；
+  没有把上一任务的打包证据冒充本次新执行。
+
+首次浏览器运行 77 通过、Firefox 1 失败：撤销后的 URL 仍能复用已解码图片，说明图片缓存
+不是 URL 可用性的可靠判断。测试改为撤销前读出内容、撤销后 fresh fetch 精确 TypeError；
+同时验证进行中的 fetch 返回 AbortError。没有修改生产实现去迎合缓存，也没有重试或跳过。
+最初 Node RAF mock 误用了不存在的方法创建选项，已改为显式安装并恢复测试全局；生产不打补丁。
+执行指纹、首次失败摘要和最终状态见 [验证报告](../baselines/resource-scope-validation.json)。
+
+[核心架构](../../packages/artplayer/ARCHITECTURE.md) 维护所有权、错误协议、内部/公开边界与修改入口。
+下一项 CORE-04 需接入实例登记、处理构造失败/重复销毁并补真实播放器回归，再按各任务迁移
+具体操作资源。本任务独立提交；回退提交即可恢复文件、脚本和文档。无推送、版本变更或发布。
diff --git a/refactor/plan.md b/refactor/plan.md
index aa9902058..687f0311f 100644
--- a/refactor/plan.md
+++ b/refactor/plan.md
@@ -4,7 +4,7 @@
 
 基线：`40fcda6a37d0049d42e49c1e64e70d4fd9ba5f7f`。总任务 214 项，范围 22 个包及工作区/示例。
 
-状态：todo 176 / doing 0 / blocked 0 / done 38 / deferred 0。风险 L/M/H 表示兼容风险，不表示工期。
+状态：todo 175 / doing 0 / blocked 0 / done 39 / deferred 0。风险 L/M/H 表示兼容风险，不表示工期。
 
 前置依赖是启动条件；验收是完成条件。任务可以继续拆分，但不能复用或悄悄删除旧 ID。
 
@@ -106,7 +106,7 @@
 | --- | --- | --- | --- | --- | --- | --- |
 | CORE-01 | artplayer<br>迁移纯工具并冻结导出 | ENG-03, ENG-04, ENG-06, PILOT-01 | utils/time/property/format/file/error/subtitle 的分批 TS 迁移 | Artplayer.utils 导出/参数/绑定保持，纯逻辑与类型测试通过 | M | done |
 | CORE-02 | artplayer<br>迁移内部 Emitter | CORE-01, BASE-03 | 带类型事件映射的原 Emitter 实现 | ctx、once/off、重入/异常和链式返回保持 | H | done |
-| CORE-03 | artplayer<br>建立内部资源作用域 | CORE-02 | 监听/订阅/定时器/RAF/请求/URL 的资源登记 | 实例与操作作用域分离，单项清理失败不阻断其他资源 | H | todo |
+| CORE-03 | artplayer<br>建立内部资源作用域 | CORE-02 | 监听/订阅/定时器/RAF/请求/URL 的资源登记 | 实例与操作作用域分离，单项清理失败不阻断其他资源 | H | done |
 | CORE-04 | artplayer<br>修复初始化与销毁生命周期 | CORE-03, ENG-05, BASE-07 | 构造失败回收、重复/重入 destroy、instances 修复 | 事件顺序、removeHtml、多实例和销毁中异步有真实回归；处理 baselines/lifecycle-coverage.md 的 BASE-LIFE-04/05 并增加候选正向回归；协调 BASE-PERF-01 销毁后定时器与回调归属 | H | todo |
 | CORE-05 | artplayer<br>区分输入配置和内部配置 | CORE-01, ENG-04 | Option/ResolvedOption、默认值与校验整理 | 配置合并/错误时机不变，JS 输入仍运行时校验 | M | todo |
 | CORE-06 | artplayer<br>建立内部媒体与宿主类型 | CORE-05 | 原生 video、canvas shim、UI host 类型 | 不更改公开 art.video 用法，不以 HTMLVideoElement 断言掩盖 shim | M | todo |
@@ -437,6 +437,7 @@
 - PILOT-01: [记录](changes/2026-09-10-PILOT-01-chapter.md) [记录](baselines/pilot-validation.json)
 - CORE-01: [记录](changes/2026-09-10-CORE-01-typed-utils.md) [记录](baselines/core-utils-validation.json)
 - CORE-02: [记录](changes/2026-09-11-CORE-02-typed-emitter.md) [记录](baselines/emitter-validation.json)
+- CORE-03: [记录](changes/2026-09-11-CORE-03-resource-scope.md) [记录](baselines/resource-scope-validation.json)
 - PKG-CHAPTER-01: [记录](changes/2026-09-10-PKG-CHAPTER-01-contract.md) [记录](baselines/chapter-contract.md)
 - PKG-CHAPTER-02: [记录](changes/2026-09-10-PKG-CHAPTER-02-tests.md) [记录](baselines/chapter-validation.json)
 - PKG-CHAPTER-03: [记录](changes/2026-09-10-PKG-CHAPTER-03-typescript-modules.md) [记录](baselines/chapter-migration-validation.json)
diff --git a/refactor/progress.md b/refactor/progress.md
index f2e05f7a9..a0b23fa64 100644
--- a/refactor/progress.md
+++ b/refactor/progress.md
@@ -1,5 +1,9 @@
 # 进度与证据
 
+## 当前实施：CORE-03 内部资源作用域完成
+
+新增两个核心 TS 文件，明确同步清理、实例/操作作用域、异常汇总及原生资源适配。94 项 Node/基线与 78 项三浏览器检查通过；首次 Firefox 图片缓存误判已保留并改为 fresh fetch 验证。见 [交付](changes/2026-09-11-CORE-03-resource-scope.md)。当前 214 项，39 完成、175 待办；核心十个 TS 文件、chapter 五个。作用域尚未接入播放器，旧生命周期风险仍开放；下一项 CORE-04 直接改构造与销毁。
+
 ## 当前实施：CORE-02 Emitter TS 迁移完成
 
 事件映射、payload/ctx 和链式类型已加入；九组普通契约保持，另修复原型事件名与嵌套快照重复 once。85 项 Node/基线、75 项三浏览器、三格式各 29 项 Emitter 检查通过；严格打包 27 项运行时/五组类型零诊断。见 [交付](changes/2026-09-11-CORE-02-typed-emitter.md)。当前 214 项，38 完成、176 待办。核心八个 TS 文件、chapter 五个 TS 文件；下一项 CORE-03 内部资源作用域。
diff --git a/refactor/tasks.json b/refactor/tasks.json
index e69674df8..c7a57314e 100644
--- a/refactor/tasks.json
+++ b/refactor/tasks.json
@@ -789,11 +789,14 @@
       "dependsOn": [
         "CORE-02"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "H",
       "deliverable": "监听/订阅/定时器/RAF/请求/URL 的资源登记",
       "acceptance": "实例与操作作用域分离，单项清理失败不阻断其他资源",
-      "evidence": []
+      "evidence": [
+        "changes/2026-09-11-CORE-03-resource-scope.md",
+        "baselines/resource-scope-validation.json"
+      ]
     },
     {
       "id": "CORE-04",
diff --git a/test/browser/resource-scope.spec.js b/test/browser/resource-scope.spec.js
new file mode 100644
index 000000000..395e358b7
--- /dev/null
+++ b/test/browser/resource-scope.spec.js
@@ -0,0 +1,75 @@
+import { createHash } from 'node:crypto'
+import { build } from 'esbuild'
+import { expect, test } from './fixtures.js'
+
+// Explicit internal-source fixture, not evidence of an installed public API.
+const fixture = await build({
+  stdin: { contents: 'export { default as ResourceScope } from \'./packages/artplayer/src/lifecycle/scope\'; export * from \'./packages/artplayer/src/lifecycle/resources\'', resolveDir: process.cwd() },
+  bundle: true,
+  write: false,
+  format: 'iife',
+  globalName: 'ResourceFixture',
+  target: 'es2015',
+})
+
+test('internal resource scope: native DOM, RAF, timer, fetch abort and URL release', async ({ page, browserName, diagnostics }, testInfo) => {
+  await testInfo.attach('internal-source-fixture', { contentType: 'application/json', body: JSON.stringify({ kind: 'internal-source-fixture', target: 'es2015', sha256: createHash('sha256').update(fixture.outputFiles[0].text).digest('hex') }) })
+  await page.goto('/test/player.html?core=candidate&chapter=published')
+  await page.addScriptTag({ content: fixture.outputFiles[0].text })
+  const result = await page.evaluate(async () => {
+    const { ResourceScope, listen, timeout, animationFrame, requestController, objectURL } = window.ResourceFixture
+    const instance = new ResourceScope()
+    const operation = instance.child()
+    const button = document.createElement('button')
+    document.body.append(button)
+    const calls = []
+    const options = { capture: true }
+    listen(operation, button, 'click', function () {
+      calls.push(this === button ? 'click' : 'wrong-receiver')
+    }, options)
+    options.capture = false
+    button.click()
+    const text = await (await fetch(objectURL(operation, new Blob(['scoped'])))).text()
+    const revoked = objectURL(operation, new Blob(['revoked']))
+    const before = await (await fetch(revoked)).text()
+    const controller = requestController(operation)
+    await new Promise(resolve => animationFrame(operation, (time) => {
+      calls.push(typeof time)
+      resolve()
+    }))
+    await new Promise(resolve => timeout(operation, () => {
+      calls.push('timer')
+      resolve()
+    }, 0))
+    animationFrame(operation, () => calls.push('cancelled-frame'))
+    timeout(operation, () => calls.push('cancelled-timer'), 0)
+    const pendingRequest = fetch('/test/pattern.mp4', { signal: controller.signal }).then(() => 'resolved', error => error.name)
+    operation.dispose()
+    button.click()
+    // Await independent native scheduling turns so cancelled callbacks would be observable.
+    await new Promise(resolve => requestAnimationFrame(resolve))
+    await new Promise(resolve => setTimeout(resolve, 0))
+    const abortName = await pendingRequest
+    // Image caches may retain decoded pixels; a fresh fetch tests URL availability.
+    let revokedError
+    try {
+      await fetch(revoked)
+    }
+    catch (error) { revokedError = error.name }
+    button.remove()
+    const instanceOpen = !instance.closed
+    instance.dispose()
+    return { text, before, calls, aborted: controller.signal.aborted, abortName, revokedError, instanceOpen, revoked, requestURL: new URL('/test/pattern.mp4', location.href).href }
+  })
+  const { revoked, requestURL, ...behavior } = result
+  expect(behavior).toEqual({ text: 'scoped', before: 'revoked', calls: ['click', 'number', 'timer'], aborted: true, abortName: 'AbortError', revokedError: 'TypeError', instanceOpen: true })
+  const expectedFailures = {
+    chromium: [{ url: requestURL, resourceType: 'fetch', failure: { errorText: 'net::ERR_ABORTED' } }, { url: revoked, resourceType: 'fetch', failure: { errorText: 'net::ERR_FILE_NOT_FOUND' } }],
+    firefox: [],
+    webkit: [{ url: requestURL, resourceType: 'fetch', failure: { errorText: 'Load request cancelled' } }, { url: revoked, resourceType: 'fetch', failure: null }],
+  }
+  for (const failure of diagnostics.failedRequests)
+    expect(expectedFailures[browserName]).toContainEqual(failure)
+  const expectedConsole = { chromium: ['Failed to load resource: net::ERR_FILE_NOT_FOUND'], firefox: [], webkit: ['Failed to load resource'] }
+  expect(diagnostics.consoleErrors).toEqual(expectedConsole[browserName])
+})
diff --git a/test/resource-scope.test.js b/test/resource-scope.test.js
new file mode 100644
index 000000000..b198160d8
--- /dev/null
+++ b/test/resource-scope.test.js
@@ -0,0 +1,196 @@
+import assert from 'node:assert/strict'
+// eslint-disable-next-line test/no-import-node-test -- Control timers and native API failures.
+import { test } from 'node:test'
+import { loadModules } from './helpers/load.js'
+
+const source = 'packages/artplayer/src/lifecycle/'
+const { ResourceScope, ResourceCleanupError, timeout, animationFrame, listen, requestController, objectURL, Emitter } = await loadModules({
+  ResourceScope: `${source}scope`,
+  ResourceCleanupError: { file: `${source}scope`, name: 'ResourceCleanupError' },
+  ...Object.fromEntries(['timeout', 'animationFrame', 'listen', 'requestController', 'objectURL'].map(name => [name, { file: `${source}resources`, name }])),
+  Emitter: 'packages/artplayer/src/utils/emitter',
+})
+
+test('scope closes before cleanup, unwinds children and collects failures without retaining registrations', () => {
+  const scope = new ResourceScope()
+  const calls = []
+  const first = new Error('first')
+  const second = new Error('second')
+  scope.add(() => {
+    calls.push('oldest')
+    throw first
+  })
+  const child = scope.child()
+  child.add(() => {
+    calls.push('child')
+    throw second
+  })
+  scope.add(() => {
+    assert(scope.closed)
+    scope.dispose()
+    scope.add(() => {
+      calls.push('late')
+    })
+    calls.push('newest')
+  })
+  assert.throws(() => scope.dispose(), error => error instanceof ResourceCleanupError && assert.deepEqual(error.errors, [second, first]) === undefined)
+  assert.deepEqual(calls, ['late', 'newest', 'child', 'oldest'])
+  assert(child.closed)
+  scope.dispose()
+  assert.equal(calls.length, 4)
+})
+
+test('operation completion detaches from the live instance and siblings remain usable', () => {
+  const instance = new ResourceScope()
+  const operation = instance.child()
+  const sibling = instance.child()
+  let calls = 0
+  const release = operation.add(() => {
+    calls++
+  })
+  release()
+  release()
+  operation.dispose()
+  assert.equal(calls, 1)
+  assert.equal(instance.closed, false)
+  assert.equal(sibling.closed, false)
+  // A completed operation must no longer be invoked by its former owner.
+  operation.dispose = () => {
+    throw new Error('retained operation')
+  }
+  instance.dispose()
+  assert(sibling.closed)
+  assert(instance.child().closed)
+})
+
+test('failed explicit release is consumed and cannot prevent later scope cleanup', () => {
+  const scope = new ResourceScope()
+  const error = new Error('release')
+  let calls = 0
+  scope.add(() => {
+    calls++
+  })
+  const release = scope.add(() => {
+    throw error
+  })
+  assert.throws(release, value => value === error)
+  release()
+  scope.dispose()
+  assert.equal(calls, 1)
+})
+
+test('scope owns subscriptions without removing unrelated emitter listeners', () => {
+  const emitter = new Emitter()
+  const scope = new ResourceScope()
+  const calls = []
+  const owned = value => calls.push(value)
+  emitter.on('value', owned).on('value', () => calls.push('external'))
+  scope.add(() => {
+    emitter.off('value', owned)
+  })
+  emitter.emit('value', 1)
+  scope.dispose()
+  emitter.emit('value', 2)
+  assert.deepEqual(calls, [1, 'external', 'external'])
+})
+
+test('timers finish or cancel independently and reject work after disposal', (context) => {
+  context.mock.timers.enable({ apis: ['setTimeout'] })
+  const scope = new ResourceScope()
+  const calls = []
+  timeout(scope, () => calls.push('finished'), 5)
+  timeout(scope, () => calls.push('cancelled'), 10)()
+  timeout(scope, () => calls.push('disposed'), 20)
+  context.mock.timers.tick(5)
+  scope.dispose()
+  timeout(scope, () => calls.push('late'), 0)
+  context.mock.timers.tick(100)
+  assert.deepEqual(calls, ['finished'])
+})
+
+test('queued RAF is guarded after cancellation, timestamp is forwarded and completed frames detach', (context) => {
+  const callbacks = []
+  const cancelled = []
+  const descriptors = Object.getOwnPropertyDescriptors(globalThis)
+  globalThis.requestAnimationFrame = callback => callbacks.push(callback)
+  globalThis.cancelAnimationFrame = id => cancelled.push(id)
+  context.after(() => {
+    for (const key of ['requestAnimationFrame', 'cancelAnimationFrame']) {
+      if (descriptors[key])
+        Object.defineProperty(globalThis, key, descriptors[key])
+      else
+        delete globalThis[key]
+    }
+  })
+  const scope = new ResourceScope()
+  const calls = []
+  animationFrame(scope, time => calls.push(time))
+  callbacks[0](12)
+  animationFrame(scope, time => calls.push(time))()
+  callbacks[1](18)
+  animationFrame(scope, time => calls.push(time))
+  scope.dispose()
+  callbacks[2](24)
+  animationFrame(scope, () => calls.push('late'))
+  assert.deepEqual(calls, [12])
+  assert.deepEqual(cancelled, [1, 2, 3])
+  assert.equal(callbacks.length, 3)
+})
+
+test('DOM once reentry, receiver, object listener, external abort and captured options', () => {
+  const scope = new ResourceScope()
+  const target = new EventTarget()
+  let calls = 0
+  listen(scope, target, 'value', function () {
+    assert.equal(this, target)
+    calls++
+    target.dispatchEvent(new Event('value'))
+  }, { once: true })
+  target.dispatchEvent(new Event('value'))
+  assert.equal(calls, 1)
+  const controller = new AbortController()
+  const options = { signal: controller.signal, capture: false }
+  const listener = { handleEvent() {
+    assert.equal(this, listener)
+    calls++
+  } }
+  listen(scope, target, 'object', listener, options)
+  options.capture = true
+  target.dispatchEvent(new Event('object'))
+  controller.abort()
+  target.dispatchEvent(new Event('object'))
+  scope.dispose()
+  listen(scope, target, 'object', listener)
+  target.dispatchEvent(new Event('object'))
+  assert.equal(calls, 2)
+})
+
+test('request cancellation and URL ownership are scoped; caller URLs stay available', async () => {
+  const instance = new ResourceScope()
+  const operation = instance.child()
+  const controller = requestController(operation)
+  const url = objectURL(operation, new Blob(['owned']))
+  const external = URL.createObjectURL(new Blob(['external']))
+  try {
+    assert.equal(await (await fetch(url)).text(), 'owned')
+    operation.dispose()
+    assert(controller.signal.aborted)
+    await assert.rejects(fetch(url))
+    assert.equal(await (await fetch(external)).text(), 'external')
+    assert.equal(instance.closed, false)
+    assert(requestController(operation).signal.aborted)
+  }
+  finally {
+    URL.revokeObjectURL(external)
+    instance.dispose()
+  }
+})
+
+test('request controller capability absence does not prevent synchronous cleanup', (context) => {
+  const descriptor = Object.getOwnPropertyDescriptor(globalThis, 'AbortController')
+  Object.defineProperty(globalThis, 'AbortController', { configurable: true, value: undefined })
+  context.after(() => Object.defineProperty(globalThis, 'AbortController', descriptor))
+  const scope = new ResourceScope()
+  assert.equal(requestController(scope), undefined)
+  scope.dispose()
+})
diff --git a/test/types/resource-scope.ts b/test/types/resource-scope.ts
new file mode 100644
index 000000000..293e26e85
--- /dev/null
+++ b/test/types/resource-scope.ts
@@ -0,0 +1,25 @@
+import { animationFrame, listen, objectURL, requestController, timeout } from '../../packages/artplayer/src/lifecycle/resources'
+import ResourceScope from '../../packages/artplayer/src/lifecycle/scope'
+
+const instance = new ResourceScope()
+const operation = instance.child()
+operation.add(() => {
+  document.body.removeAttribute('data-test')
+})
+timeout(operation, () => {}, 10)
+animationFrame(operation, time => time.toFixed())
+listen(operation, document, 'click', { handleEvent(event) {
+  event.preventDefault()
+} })
+const url: string = objectURL(operation, new Blob())
+const signal: AbortSignal | undefined = requestController(operation)?.signal
+void [url, signal]
+// @ts-expect-error Cleanup is synchronous; async work needs a separately awaited owner.
+operation.add(async () => {})
+// @ts-expect-error A cleanup cannot return a timer handle.
+operation.add(() => 1)
+// @ts-expect-error Delays must be numeric.
+timeout(operation, () => {}, '10')
+// @ts-expect-error Object URLs require a Blob.
+objectURL(operation, 'existing-url')
+instance.dispose()