diff --git a/refactor/baselines/README.md b/refactor/baselines/README.md
index 67ad00adf..9d2c837c6 100644
--- a/refactor/baselines/README.md
+++ b/refactor/baselines/README.md
@@ -35,6 +35,10 @@ BASE-01 于 2026-09-10 固定核心与 chapter 的 npm 发布内容，数据在
 
 ## 公共 API 报告
 
+Audio Track 的后续包基线由 PKG-AUDIO-01 独立冻结，见
+[契约和重跑](audio-track-contract.md) 及 [1.1.0 归档来源](audio-track-release.json)。
+它不改写本目录初始 BASE 快照，媒体/类型/设备通过范围由后续任务提供。
+
 BASE-02 已在内置浏览器取得核心/chapter 的同步 API 和描述符快照，见 [覆盖与重跑](api-coverage.md) 和 [冻结报告](public-api.json)。事件/生命周期、DOM、类型、分发和其他包仍由各自任务补齐。
 
 ## 事件与生命周期报告
diff --git a/refactor/baselines/audio-track-contract.md b/refactor/baselines/audio-track-contract.md
new file mode 100644
index 000000000..1202f7bd2
--- /dev/null
+++ b/refactor/baselines/audio-track-contract.md
@@ -0,0 +1,94 @@
+# Audio Track 1.1.0 兼容基线
+
+PKG-AUDIO-01；源码起点 26b2983daf9edf9c798ce6a1638deeb3c36ba778。
+固定来源、逐文件 SHA-256、npm SRI、历史源码及比较结果见
+[audio-track-release.json](audio-track-release.json)。不覆盖 BASE-01 的历史快照。
+
+## 来源与范围
+
+npm 观察到 1.0.0、1.1.0，采集时 latest 为 1.1.0。本次实际归档范围为 **1.1.0**，
+不是所有历史版本。六文件归档完整性通过，manifest、README、公开声明与起点源码
+在 LF 规范化后相同，发布 ESM 与源码工厂经 AST 提取/esbuild 规范化后相同。
+这证明比较范围内的逻辑一致，不能代替真实媒体行为测试。
+
+registry gitHead daf133b22630b4a0eecfa3336bbddab0e9119d96 对应本地包版本 1.0.2，
+不是该 npm 1.1.0 源码的充分证明；因此保留归档完整性和独立工厂比较。
+manifest 无 runtime/peer 依赖、无核心/浏览器/TS 最低版本承诺。
+旧核心对照使用现有冻结的 5.4.0；这只是具体检查点，不宣称最低支持版本为 5.4.0。
+
+## 公开形状及调用
+
+```js
+const attach = artplayerPluginAudioTrack({ url: '/audio.aac', offset: 0, sync: 0.3 })
+// ArtPlayer 注册时调用 attach(art)
+const result = art.plugins.artplayerPluginAudioTrack
+result.update({ url: '/next.aac', offset: 0.2 })
+const audio = result.audio // 同一 HTMLAudioElement，可直接操作
+```
+
+工厂配置为必传对象；工厂同步返回安装函数，安装同步返回 `{ name, audio, update }`。
+name 固定为 `artplayerPluginAudioTrack`，update 同步返回 undefined。没有额外公开 destroy、
+事件、UI、CSS、静态版本或 SDK。插件创建独立 Audio 元素，不替换主视频，也不自动静音主视频；
+因此含原音轨的主视频可能与外部音频同时播放，这是现有行为，不静默改变音量策略。
+每次安装创建独立状态；配置在安装时解构，调用工厂后、安装前的对象修改会生效。
+
+| 输入或行为 | 1.1.0 源码/发布实现事实 | 兼容与后续验证 |
+| --- | --- | --- |
+| url | 初始仅 truthy 时赋给 audio.src，preload 为 auto | URL 字符串交给浏览器解析，无 SDK |
+| offset | 默认 0，目标 audio 时间是 art.currentTime + offset | 正数音频领先、负数滞后；负目标/超时长在 02 实测 |
+| sync | 默认 0.3，仅绝对偏差严格大于阈值才 seek | 等于阈值不写；未校验负数、NaN、Infinity，不能凭猜测新增拒绝规则 |
+| update | truthy 且不同 URL 才赋 src；playing 时调用 play；之后才更新 offset/sync | 同 URL 不重载，空 URL 不清源；JS 允许只传 offset/sync，且不立即同步 |
+| audio | 公开真实元素，同一引用贯穿安装/更新/销毁 | 不换为不可访问封装，不用新元素实现每次切源 |
+| 音量/倍率 | 初始 volume/muted 来自 art；倍率 video?.playbackRate 或 1 | 后续 video:volumechange/ratechange 同步，无自有主视频 mute |
+| play 拒绝 | 三个调用点各自 catch 并 console.warn 原错误 | 没有返回给调用者的 play Promise、没有自定义错误事件 |
+
+| ArtPlayer 事件 | 外部音频行为 |
+| --- | --- |
+| play | 有 URL 才同步目标时间，随后 audio.play |
+| pause | audio.pause |
+| seek | 有 video/URL 才同步时间 |
+| video:timeupdate | art.playing 时同步时间 |
+| video:ratechange | 读 art.video.playbackRate |
+| video:volumechange | 同步 art.volume 和 art.muted |
+| video:waiting | audio.pause |
+| video:playing | 有 URL 且 art.playing 才 audio.play，不主动 sync |
+| destroy | pause、src = ''、load，按此顺序 |
+
+没有定时器或自建请求；浏览器拥有媒体加载。当前九个 emitter 回调没有插件自身解绑，
+依赖核心销毁清空事件。没有 closed 状态，外部保留的 update 可在销毁后写入新 src。
+这些是源码观察，02 用受控复现及真实媒体验证；不能只凭观察称内存泄漏已复现。
+
+## 类型和分发
+
+公开默认导出为 `(option: Option) => (art: Artplayer) => Result`，Option.url 必需、
+offset/sync 可选；Result.audio 为 HTMLAudioElement，update(option: Option): void。
+Option/Result 未具名导出，消费者可用 Parameters/ReturnType 提取；04 保留这些旧合法调用。
+JS 的 update({ offset: 1 }) 与声明不一致，允许拓宽 update 为部分配置，但不弱化字段类型。
+docs 编辑器声明还同时包含 export default/export =，由 04 做语义验证及生成修正，
+本步不声称编辑器或 TS 消费已经通过。
+
+root exports 使用 types + import(mjs)/require(js)，legacy import/require 都指向 legacy.js；
+main/module/types/legacy 的完整值冻结在 manifest。UMD 全局名与默认导出一致。
+保留 `/legacy`、旧文件路径、同步注册和未加载 DOM 时的导入边界；实际各格式消费由 02/04/06 验证。
+当前版本保持 1.1.0，REL-09 按用户要求准备 2.0.0，未获 npm 发布授权。
+
+## 文档、样本与差异归属
+
+README 仅说明插件名、Demo 和 MIT；其 `example=audio-track` 与真实
+`docs/assets/example/audio.track.js` 不一致。common.js 直接拼接名称，无连字符转换。
+实际示例使用本地 sprite-fight.mp4 + sprite-fight.aac，二者存在；没有演示 update、
+偏移边界或销毁。06 应修链接并以正式 8082 demo 验证，不能拿静态文件存在作为播放通过。
+
+| 风险 | 当前证据等级 | 负责任务 |
+| --- | --- | --- |
+| AUDIO-LIFE-01：销毁后 update 可写 src，监听/异步播放归属缺少终止守卫 | 源码事实，未作浏览器泄漏结论 | 02/03/05 |
+| AUDIO-SYNC-01：偏移边界及切源/缓冲恢复缺少媒体时序证据 | 待取证，不预设所有当前行为是缺陷 | 02/03/05 |
+| AUDIO-TYPE-01：update 部分配置和编辑器声明不一致 | 源码/声明事实 | 04 |
+| AUDIO-DEMO-01：README 示例名不匹配、维护说明缺失 | 源码/文件事实 | 06 |
+
+## 重跑
+
+`node refactor/scripts/audio-contract.mjs`：重验固定归档、六文件、manifest、历史 Git 内容与工厂。
+首次仅从固定 npm URL 下载至忽略缓存；不安装、不执行归档脚本、不覆盖基线。
+`node --test refactor/scripts/audio-contract.test.mjs`：包含该验证及规范化工具的有意行为变化检查。
+本步不改生产代码/声明/构建产物；所有媒体、类型和设备验收仍是后续任务。
diff --git a/refactor/baselines/audio-track-release.json b/refactor/baselines/audio-track-release.json
new file mode 100644
index 000000000..f9dbc9dc9
--- /dev/null
+++ b/refactor/baselines/audio-track-release.json
@@ -0,0 +1,113 @@
+{
+  "schemaVersion": 1,
+  "task": "PKG-AUDIO-01",
+  "capturedAt": "2026-09-11T17:44:31.880Z",
+  "sourceCommit": "26b2983daf9edf9c798ce6a1638deeb3c36ba778",
+  "registryObservation": {
+    "registryUrl": "https://registry.npmjs.org/artplayer-plugin-audio-track",
+    "distTags": {
+      "latest": "1.1.0"
+    },
+    "versions": [
+      "1.0.0",
+      "1.1.0"
+    ],
+    "publishedAt": "2026-03-12T14:21:57.424Z",
+    "note": "Observed metadata; not a promise of future latest version or support for every older release."
+  },
+  "release": {
+    "name": "artplayer-plugin-audio-track",
+    "version": "1.1.0",
+    "metadataUrl": "https://registry.npmjs.org/artplayer-plugin-audio-track/1.1.0",
+    "tarball": "https://registry.npmjs.org/artplayer-plugin-audio-track/-/artplayer-plugin-audio-track-1.1.0.tgz",
+    "integrity": "sha512-pvvHvTSqC2+sBelwYyjAv2CVmaQgG9KpX+i96t/e8oyZRX/JuepC9iSVIp7GzB3AtliFzhVamksT+8lXvD3RCg==",
+    "sha256": "7e84f6a2f4bfada428a77ef04b749bf3db53e0149fa1afe7bf5749d925e801ff",
+    "archiveBytes": 2205,
+    "registryGitHead": "daf133b22630b4a0eecfa3336bbddab0e9119d96",
+    "files": {
+      "package/README.md": "9a03352433ae90cb9d3198e17571c9bb598334b84a77a3a1df2c4b000ce8347d",
+      "package/dist/artplayer-plugin-audio-track.js": "473f39f1d750f0722cca7e857c12c3c978ebe3c3b2352e325f1248318e508683",
+      "package/dist/artplayer-plugin-audio-track.legacy.js": "d8dc74bce76112d7430c98e3165605e32fde5d3c603be4b496eac58f574576cb",
+      "package/dist/artplayer-plugin-audio-track.mjs": "4ac599bc5a1a6ecb0cb1942d4269528bfb2cd9d047f988de61fe671a77ad14cd",
+      "package/package.json": "c466ae55c40e8f6bdd97bec20fcf916c8c4f44eef3e47694638be005eb445df7",
+      "package/types/artplayer-plugin-audio-track.d.ts": "27bc0dfedacb7e0188cb668ac8708874a86b00d489f1636037c2465d3344437e"
+    },
+    "manifest": {
+      "name": "artplayer-plugin-audio-track",
+      "version": "1.1.0",
+      "description": "audio-track plugin for ArtPlayer",
+      "author": "Harvey Zhao <laozhaochaguan@gmail.com>",
+      "license": "MIT",
+      "homepage": "https://artplayer.org",
+      "repository": {
+        "type": "git",
+        "url": "git+https://github.com/zhw2590582/ArtPlayer.git"
+      },
+      "bugs": {
+        "url": "https://github.com/zhw2590582/ArtPlayer/issues"
+      },
+      "keywords": [
+        "html5",
+        "video",
+        "player"
+      ],
+      "exports": {
+        ".": {
+          "types": "./types/artplayer-plugin-audio-track.d.ts",
+          "import": "./dist/artplayer-plugin-audio-track.mjs",
+          "require": "./dist/artplayer-plugin-audio-track.js"
+        },
+        "./legacy": {
+          "types": "./types/artplayer-plugin-audio-track.d.ts",
+          "import": "./dist/artplayer-plugin-audio-track.legacy.js",
+          "require": "./dist/artplayer-plugin-audio-track.legacy.js"
+        }
+      },
+      "main": "dist/artplayer-plugin-audio-track.js",
+      "module": "./dist/artplayer-plugin-audio-track.mjs",
+      "types": "types/artplayer-plugin-audio-track.d.ts",
+      "legacy": "dist/artplayer-plugin-audio-track.legacy.js",
+      "browserslist": "last 1 Chrome version"
+    }
+  },
+  "source": {
+    "packages/artplayer-plugin-audio-track/package.json": "c466ae55c40e8f6bdd97bec20fcf916c8c4f44eef3e47694638be005eb445df7",
+    "packages/artplayer-plugin-audio-track/README.md": "9a03352433ae90cb9d3198e17571c9bb598334b84a77a3a1df2c4b000ce8347d",
+    "packages/artplayer-plugin-audio-track/types/artplayer-plugin-audio-track.d.ts": "27bc0dfedacb7e0188cb668ac8708874a86b00d489f1636037c2465d3344437e",
+    "packages/artplayer-plugin-audio-track/src/index.js": "470237ebd62e8fb8537e809db03fd02871844d41c03d422a22956bd2756ac28e",
+    "docs/assets/example/audio.track.js": "9ed26b2ee006e1a430db68b2a1b308c4801dd3a4cc87c74e8a8f5ccf3456ac8d",
+    "docs/assets/ts/artplayer-plugin-audio-track.d.ts": "e0815cb05be2366957df77f0de81a46f863c4d8e0a0697fac1258c4f48da85ea"
+  },
+  "comparisons": [
+    {
+      "file": "package.json",
+      "publishedLF": "c466ae55c40e8f6bdd97bec20fcf916c8c4f44eef3e47694638be005eb445df7",
+      "workspaceLF": "c466ae55c40e8f6bdd97bec20fcf916c8c4f44eef3e47694638be005eb445df7",
+      "equal": true
+    },
+    {
+      "file": "README.md",
+      "publishedLF": "9a03352433ae90cb9d3198e17571c9bb598334b84a77a3a1df2c4b000ce8347d",
+      "workspaceLF": "9a03352433ae90cb9d3198e17571c9bb598334b84a77a3a1df2c4b000ce8347d",
+      "equal": true
+    },
+    {
+      "file": "types/artplayer-plugin-audio-track.d.ts",
+      "publishedLF": "27bc0dfedacb7e0188cb668ac8708874a86b00d489f1636037c2465d3344437e",
+      "workspaceLF": "27bc0dfedacb7e0188cb668ac8708874a86b00d489f1636037c2465d3344437e",
+      "equal": true
+    }
+  ],
+  "functionComparison": {
+    "sha256": "6a758f0a88567283ae44bc9d1fa0906161f6ce9d384803637d7124c2dc1b87da",
+    "typescript": "5.9.3",
+    "esbuild": "0.27.7",
+    "scope": [
+      "artplayerPluginAudioTrack"
+    ],
+    "excludes": [
+      "bundler wrappers"
+    ],
+    "note": "Historical source at sourceCommit; normalized factory comparison is not runtime acceptance."
+  }
+}
diff --git a/refactor/changes/2026-09-12-PKG-AUDIO-01-contract.md b/refactor/changes/2026-09-12-PKG-AUDIO-01-contract.md
new file mode 100644
index 000000000..d9ec52794
--- /dev/null
+++ b/refactor/changes/2026-09-12-PKG-AUDIO-01-contract.md
@@ -0,0 +1,41 @@
+# PKG-AUDIO-01：Audio Track 发布契约
+
+状态：本步契约验收完成。起点为 HLS 诊断检查点 26b2983d；后者仍未完成，不构成依赖阻塞。
+
+范围：固定 audio-track 1.1.0 的 npm 归档、声明、源码和 demo 差异，记录同步、
+暴露 audio、update 和事件契约。本步不修改生产行为。后续 02 建行为测试，03 整理
+同步与资源，04 迁移严格 TS 和兼容声明，05/06 完成组合、设备与分发验收。
+
+## 来源和结果
+
+真实 npm 1.1.0 归档 2205 字节、六文件，SHA-512 SRI、SHA-256、成员哈希及入口存在性通过。
+manifest、README、声明与历史源码 LF 内容一致，完整工厂 AST 规范化比较一致。
+registry gitHead 对应包版本 1.0.2，故没有把该字段当成 1.1.0 源码证明。
+来源和范围见 [冻结输入](../baselines/audio-track-release.json)，
+详细旧行为与映射见 [契约](../baselines/audio-track-contract.md)。
+
+识别出 AUDIO-LIFE-01/SYNC-01/TYPE-01/DEMO-01，分别交由 02～06；都是源码事实或待取证，
+没有声称已复现真实音频泄漏或已修复。包括公开 audio、严格同步阈值、无自动主视频静音、
+update 部分配置、错误警告、源更新及销毁顺序，旧合法接口均维持原状。
+修正文档环境矩阵对本包的能力描述：它同步独立外部 Audio，不负责 HLS 轨道拓扑选择。
+
+## 验证与范围
+
+- `node refactor/scripts/audio-contract.mjs`：六文件归档及历史源码检查通过。
+- `node --test refactor/scripts/audio-contract.test.mjs`：两项通过；额外验证格式变化不误判，
+  真实函数行为变化不能获得相同规范化指纹，缺失工厂明确失败。
+- 定向 ESLint：首次报告对象换行三处，修正格式后复验通过。
+- 计划与风险表生成/校验、Git diff 空白检查通过：216 任务、126 风险，没有豁免未解决项。
+
+新增一个只读契约检查入口及其 Node 测试，复用已有 esbuild/TypeScript/tar 依赖，
+无新安装依赖或 lock 变更。首次会下载已冻结归档至忽略缓存；不会安装/执行归档代码，
+不会更新持久基线。`yarn test:baseline` 的既有文件模式自动纳入这两项。
+生产源码、声明、demo、构建产物完全未改，因此本步不重建、不声称浏览器或类型消费者通过。
+
+## 提交、回退与接续
+
+独立完成提交主题：`docs(audio): [PKG-AUDIO-01] freeze released synchronization contract`。
+仅回退本任务新增基线/检查及任务文档即可恢复先前状态；无生产行为回退需求。
+基线本身长期不可覆盖，后续修改另建证据。下一步 PKG-AUDIO-02 建立可重跑的旧版行为、
+边界与错误测试，03/04 按证据拆分、修复、迁移 TS；包内实际模块地图随实现交付。
+剩余所有包、设备、CI/CD、major 及三轮复盘继续保留。未 push/tag/publish/merge。
diff --git a/refactor/environment-matrix.md b/refactor/environment-matrix.md
index e48fe51cb..f73d6f8ad 100644
--- a/refactor/environment-matrix.md
+++ b/refactor/environment-matrix.md
@@ -36,7 +36,7 @@ Node10 是 TS 模块解析模式名，不代表支持 Node.js 10。现代 es2020
 | artplayer-plugin-ads / 2.1.0 | 广告图片/视频、本片恢复、跳过、错误/销毁；本地短广告和主片 | 发布范围及所有浏览器场景待；无需借 IMA 结果代替自有广告逻辑 | PKG-ADS-01/02/05/06 |
 | artplayer-plugin-ambilight / 1.1.0 | Canvas 采样、CORS、resize、后台/销毁；同源及受控跨源 MP4 | 待真实画布和资源测量 | PKG-AMBILIGHT-01/02/05/06 |
 | artplayer-plugin-asr / 2.1.0 | PCM 音频输出/暂停/销毁；AudioContext + 调用方服务 | 待音频环境与调用方 WebSocket 验证；示例服务版本未知，不在 PR 调线上服务 | PKG-ASR-01/02/05/06、EX-03 |
-| artplayer-plugin-audio-track / 1.1.0 | 音轨切换与同步；固定双音轨/单音轨/无音轨样本 | 待轨道来源和支持窗口确认、Safari/桌面实测 | PKG-AUDIO-01/02/05/06 |
+| artplayer-plugin-audio-track / 1.1.0 | 独立外部 Audio 与主视频时钟同步；本地 MP4+AAC，偏移/切源/缓冲/失败样本 | 1.1.0 发布及调用契约见 [包基线](baselines/audio-track-contract.md)；旧核心 5.4.0 为具体对照点，桌面/Safari 实测待完成 | PKG-AUDIO-01/02/05/06 |
 | artplayer-plugin-auto-thumbnail / 1.1.0 | 帧提取/跳转、CORS、回收；本地 MP4+跨源失败 | 待 Canvas/seek/移动内存行为 | PKG-AUTO-THUMB-01/02/05/06 |
 | artplayer-plugin-chapter / 1.1.0 | 区间、边界/重叠、hover/update、进度条组合；MP4+固定章节 | 发布 1.1.0 已冻结；最小注册/两段 DOM 已验，边界和新旧组合待 | PKG-CHAPTER-01/02/04/05/06、PILOT-01 |
 | artplayer-plugin-chromecast / 1.1.0 | Cast SDK、发送/接收会话、取消/断线、本机恢复；接收端可访问媒体 | SDK 动态地址已记录；真实接收设备和 sender 版本未知、待运行 | PKG-CAST-01/02/05/06 |
diff --git a/refactor/plan.md b/refactor/plan.md
index 46d788281..687287541 100644
--- a/refactor/plan.md
+++ b/refactor/plan.md
@@ -4,7 +4,7 @@
 
 基线：`40fcda6a37d0049d42e49c1e64e70d4fd9ba5f7f`。总任务 216 项，范围 22 个包及工作区/示例。
 
-状态：todo 150 / doing 1 / blocked 0 / done 65 / deferred 0。风险 L/M/H 表示兼容风险，不表示工期。
+状态：todo 149 / doing 1 / blocked 0 / done 66 / 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。
 
@@ -155,7 +155,7 @@
 
 | ID | 范围 / 步骤 | 前置依赖 | 交付物 | 验收条件 | 风险 | 状态 |
 | --- | --- | --- | --- | --- | --- | --- |
-| PKG-AUDIO-01 | artplayer-plugin-audio-track<br>核对包契约与历史用法 | BASE-05 | url/offset/sync、audio 实例暴露、update 与音量语义 | 源码/声明/README/demo/发布包差异已登记；公开形状和版本范围冻结 | H | todo |
+| PKG-AUDIO-01 | artplayer-plugin-audio-track<br>核对包契约与历史用法 | BASE-05 | url/offset/sync、audio 实例暴露、update 与音量语义 | 源码/声明/README/demo/发布包差异已登记；公开形状和版本范围冻结 | H | done |
 | PKG-AUDIO-02 | artplayer-plugin-audio-track<br>建立特有行为与错误测试 | PKG-AUDIO-01, ENG-03, ENG-05 | 偏移、倍率、seek、waiting/playing、加载错误和 autoplay 拒绝 | 旧版本行为可重跑，成功/失败/切源/销毁有必要断言 | H | todo |
 | PKG-AUDIO-03 | artplayer-plugin-audio-track<br>整理内部职责与资源 | PKG-AUDIO-02, CORE-10 | 外部 audio 的同步策略、监听与源更新生命周期 | 结构变化和缺陷修复分开记录；原 API/事件/资源生命周期通过 | H | todo |
 | PKG-AUDIO-04 | artplayer-plugin-audio-track<br>迁移自有源码和公开类型 | PKG-AUDIO-03, ENG-04, ENG-06, CORE-07 | Option/Result/audio、update 输入和事件类型 | 严格类型检查、旧消费样例通过；声明路径/导出和同步异步兼容 | H | todo |
@@ -466,6 +466,7 @@
 - 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)
 - PKG-CHAPTER-04: [记录](changes/2026-09-10-PKG-CHAPTER-04-public-types.md) [记录](baselines/chapter-types-validation.json)
+- PKG-AUDIO-01: [记录](changes/2026-09-12-PKG-AUDIO-01-contract.md) [记录](baselines/audio-track-contract.md) [记录](baselines/audio-track-release.json)
 - PKG-HLS-01: [记录](baselines/hls-control-contract.md) [记录](baselines/hls-control-release.json) [记录](changes/2026-09-11-PKG-HLS-01-contract.md)
 - PKG-HLS-02: [记录](hls-validation.md) [记录](baselines/hls-sdk.json) [记录](baselines/hls-validation.json) [记录](changes/2026-09-11-PKG-HLS-02-tests.md)
 - PKG-HLS-03: [记录](changes/2026-09-12-PKG-HLS-03-modules.md) [记录](baselines/hls-modules-validation.json) [记录](hls-validation.md)
diff --git a/refactor/progress.md b/refactor/progress.md
index 49dc82a6e..ae0a5a700 100644
--- a/refactor/progress.md
+++ b/refactor/progress.md
@@ -1,5 +1,17 @@
 # 进度与证据
 
+## 最新完成：PKG-AUDIO-01 外部音轨发布契约
+
+冻结 npm audio-track 1.1.0 六文件及完整性，manifest/README/声明和起点一致，
+发布工厂与源码规范化比较通过。两项可重跑检查通过；音频同步、update 部分配置、
+销毁后引用和示例链接差异已分别登记，实际行为与媒体测试由 02 接续。
+源码/声明/产物未改，本步不代表音频浏览器或类型验收通过。
+
+HLS 诊断检查点已提交 26b2983d，HLS-SDK-01 仍 doing，两项 Firefox 风险仍 open。
+当前 216 项、66 done、1 doing、149 todo。Audio-01 按任务独立本地提交后核实，
+继续 Audio-02，避免未归因的 HLS 平台问题阻塞无依赖的其他包。
+详见 [契约](baselines/audio-track-contract.md) 和 [记录](changes/2026-09-12-PKG-AUDIO-01-contract.md)。
+
 ## HLS 诊断 checkpoint：已缩小范围，尚未关闭风险
 
 独立诊断 runner 已加入直接 Hls、发布核心、候选核心对照，以及 HTTP/route、worker/观察器、
diff --git a/refactor/risk-table.md b/refactor/risk-table.md
index cc9512cd6..d8709ea94 100644
--- a/refactor/risk-table.md
+++ b/refactor/risk-table.md
@@ -126,3 +126,7 @@
 | HLS-ENV-01 | open / 已复现 | Windows WebKit 缺失 MSE，HLS 播放矩阵尚缺 Safari 证据 | PKG-HLS-05, REL-09, REVIEW-02 |
 | HLS-CRASH-01 | open / 已复现 | Firefox Hls 1.5.17 worker 销毁可在原生 video 与候选核心复现崩溃 | PKG-HLS-SDK-01, PKG-HLS-05, REVIEW-02 |
 | HLS-PLAYBACK-01 | open / 已复现 | Firefox 旧核心与 Hls 1.7.2 切组后视频档位未完成切换 | PKG-HLS-SDK-01, PKG-HLS-05, REVIEW-02 |
+| AUDIO-LIFE-01 | open / 源码/产物事实 | Audio Track 销毁后 update 与媒体/订阅缺少终止守卫 | PKG-AUDIO-02, PKG-AUDIO-03, PKG-AUDIO-05 |
+| AUDIO-SYNC-01 | open / 待取证 | Audio Track 偏移边界和切源/缓冲恢复尚缺真实时序证据 | PKG-AUDIO-02, PKG-AUDIO-03, PKG-AUDIO-05 |
+| AUDIO-TYPE-01 | open / 源码/产物事实 | Audio Track update 部分配置与公开/编辑器声明不一致 | PKG-AUDIO-04 |
+| AUDIO-DEMO-01 | open / 源码/产物事实 | Audio Track README 示例链接名称不匹配且缺维护说明 | PKG-AUDIO-06 |
diff --git a/refactor/risks.json b/refactor/risks.json
index 76446a2e2..920c3257b 100644
--- a/refactor/risks.json
+++ b/refactor/risks.json
@@ -2643,6 +2643,70 @@
       ],
       "compatibleResolution": "区分 SDK、测试媒体/时序和宿主问题，保留真实档位/解码断言及 trace；不扩大等待或只验证菜单。",
       "closureCriteria": "直接 Hls 与新旧核心对照定位切换停滞，验证处置和正常/连续组切换，不能以重复通过关闭。"
+    },
+    {
+      "id": "AUDIO-LIFE-01",
+      "title": "Audio Track 销毁后 update 与媒体/订阅缺少终止守卫",
+      "confirmation": "source-observed",
+      "status": "open",
+      "owners": [
+        "PKG-AUDIO-02",
+        "PKG-AUDIO-03",
+        "PKG-AUDIO-05"
+      ],
+      "evidence": [
+        "refactor/baselines/audio-track-contract.md",
+        "refactor/baselines/audio-track-release.json"
+      ],
+      "compatibleResolution": "保留公开 audio 和同步 update，封闭销毁后的资源写入并管理插件订阅，验证待决播放拒绝。",
+      "closureCriteria": "受控复现和新旧核心真实媒体切源/销毁验证通过，不以源码观察代替泄漏证据。"
+    },
+    {
+      "id": "AUDIO-SYNC-01",
+      "title": "Audio Track 偏移边界和切源/缓冲恢复尚缺真实时序证据",
+      "confirmation": "unverified",
+      "status": "open",
+      "owners": [
+        "PKG-AUDIO-02",
+        "PKG-AUDIO-03",
+        "PKG-AUDIO-05"
+      ],
+      "evidence": [
+        "refactor/baselines/audio-track-contract.md",
+        "refactor/baselines/audio-track-release.json"
+      ],
+      "compatibleResolution": "固定严格阈值、偏移正负、倍率和音量语义；实测负目标/超时长及连续切源，按证据修复。",
+      "closureCriteria": "正常/边界/失败/缓冲恢复有媒体与受控断言，实际支持环境缺口明确处理。"
+    },
+    {
+      "id": "AUDIO-TYPE-01",
+      "title": "Audio Track update 部分配置与公开/编辑器声明不一致",
+      "confirmation": "source-observed",
+      "status": "open",
+      "owners": [
+        "PKG-AUDIO-04"
+      ],
+      "evidence": [
+        "refactor/baselines/audio-track-contract.md",
+        "refactor/baselines/audio-track-release.json"
+      ],
+      "compatibleResolution": "拓宽已有 JS 合法部分 update，保留 url/offset/sync 字段精度和 Parameters/ReturnType 提取，生成语义正确编辑器声明。",
+      "closureCriteria": "当前与旧编译器的正反例、CJS/ESM/legacy 入口及实际编辑器通过。"
+    },
+    {
+      "id": "AUDIO-DEMO-01",
+      "title": "Audio Track README 示例链接名称不匹配且缺维护说明",
+      "confirmation": "source-observed",
+      "status": "open",
+      "owners": [
+        "PKG-AUDIO-06"
+      ],
+      "evidence": [
+        "refactor/baselines/audio-track-contract.md",
+        "refactor/baselines/audio-track-release.json"
+      ],
+      "compatibleResolution": "修正 audio.track 示例路径，补真实模块地图及 update/生命周期说明。",
+      "closureCriteria": "README、示例、公开声明一致，8082 正式 demo 和包分发验证通过。"
     }
   ]
 }
diff --git a/refactor/scripts/audio-contract.mjs b/refactor/scripts/audio-contract.mjs
new file mode 100644
index 000000000..c1ceb8354
--- /dev/null
+++ b/refactor/scripts/audio-contract.mjs
@@ -0,0 +1,62 @@
+import assert from 'node:assert/strict'
+import { execFileSync } from 'node:child_process'
+import fs from 'node:fs'
+import path from 'node:path'
+import process from 'node:process'
+import { fileURLToPath } from 'node:url'
+import { transform } from 'esbuild'
+import ts from 'typescript'
+import { archiveFiles, ensureArchive, hash, readMember, refactorDir } from './releases.mjs'
+
+const root = path.resolve(refactorDir, '..')
+export const normalizeLF = value => value.toString().replace(/\r\n/g, '\n')
+
+export async function audioFunctionHash(code) {
+  const source = ts.createSourceFile('audio.js', code, ts.ScriptTarget.Latest, true, ts.ScriptKind.JS)
+  assert.equal(source.parseDiagnostics.length, 0, 'Invalid audio source')
+  const functions = source.statements.filter(item => ts.isFunctionDeclaration(item) && item.name?.text === 'artplayerPluginAudioTrack')
+  assert.equal(functions.length, 1, 'Expected exactly one audio factory')
+  const normalized = await transform(functions[0].getText(source).replace(/^export\s+default\s+/, ''), {
+    loader: 'js',
+    target: 'es2020',
+    minifySyntax: true,
+    minifyWhitespace: true,
+  })
+  return hash(normalized.code)
+}
+
+export async function verifyAudioContract() {
+  const baseline = JSON.parse(fs.readFileSync(path.join(refactorDir, 'baselines/audio-track-release.json'), 'utf8'))
+  const { release } = baseline
+  const archive = await ensureArchive(release)
+  assert.deepEqual(archiveFiles(archive), Object.keys(release.files).sort())
+  for (const [member, expected] of Object.entries(release.files))
+    assert.equal(hash(readMember(archive, member)), expected, `Changed release member: ${member}`)
+  const manifest = JSON.parse(readMember(archive, 'package/package.json'))
+  assert.deepEqual(manifest, release.manifest)
+  for (const entry of [manifest.main, manifest.module, manifest.types, manifest.legacy])
+    assert(Object.hasOwn(release.files, `package/${entry.replace(/^\.\//, '')}`))
+  assert(/^[a-f\d]{40}$/.test(baseline.sourceCommit))
+  const historical = new Map()
+  for (const [file, expected] of Object.entries(baseline.source)) {
+    const content = normalizeLF(execFileSync('git', ['show', `${baseline.sourceCommit}:${file}`], { cwd: root }))
+    assert.equal(hash(content), expected, `Changed historical source: ${file}`)
+    historical.set(file, content)
+  }
+  for (const comparison of baseline.comparisons) {
+    const published = hash(normalizeLF(readMember(archive, `package/${comparison.file}`)))
+    const source = hash(historical.get(`packages/${release.name}/${comparison.file}`))
+    assert.equal(published, comparison.publishedLF)
+    assert.equal(source, comparison.workspaceLF)
+    assert.equal(published === source, comparison.equal)
+  }
+  const sourceHash = await audioFunctionHash(historical.get(`packages/${release.name}/src/index.js`))
+  const publishedHash = await audioFunctionHash(readMember(archive, `package/${manifest.module.replace(/^\.\//, '')}`).toString())
+  assert.equal(sourceHash, baseline.functionComparison.sha256)
+  assert.equal(publishedHash, sourceHash)
+  console.log(`Verified ${release.name}@${release.version}: archive, ${Object.keys(release.files).length} members, historical sources and normalized factory`)
+  return { baseline, archive }
+}
+
+if (process.argv[1] && path.resolve(process.argv[1]) === fileURLToPath(import.meta.url))
+  await verifyAudioContract()
diff --git a/refactor/scripts/audio-contract.test.mjs b/refactor/scripts/audio-contract.test.mjs
new file mode 100644
index 000000000..d423d7ac0
--- /dev/null
+++ b/refactor/scripts/audio-contract.test.mjs
@@ -0,0 +1,14 @@
+import assert from 'node:assert/strict'
+// eslint-disable-next-line test/no-import-node-test -- Frozen baseline checks run in Node.
+import test from 'node:test'
+import { audioFunctionHash, verifyAudioContract } from './audio-contract.mjs'
+
+test('Audio Track 1.1.0 archive and historical contract remain immutable', verifyAudioContract)
+
+test('audio factory comparison ignores formatting but detects changed behavior', async () => {
+  const original = 'export default function artplayerPluginAudioTrack(option) { return option.offset + 1 }'
+  const formatted = 'function artplayerPluginAudioTrack(option) {\n return option.offset + 1;\n }'
+  assert.equal(await audioFunctionHash(original), await audioFunctionHash(formatted))
+  assert.notEqual(await audioFunctionHash(original), await audioFunctionHash(original.replace('+ 1', '+ 2')))
+  await assert.rejects(audioFunctionHash('function unrelated() {}'), /exactly one audio factory/)
+})
diff --git a/refactor/tasks.json b/refactor/tasks.json
index 6192b50e5..c39901f37 100644
--- a/refactor/tasks.json
+++ b/refactor/tasks.json
@@ -1468,11 +1468,15 @@
       "dependsOn": [
         "BASE-05"
       ],
-      "status": "todo",
+      "status": "done",
       "risk": "H",
       "deliverable": "url/offset/sync、audio 实例暴露、update 与音量语义",
       "acceptance": "源码/声明/README/demo/发布包差异已登记；公开形状和版本范围冻结",
-      "evidence": []
+      "evidence": [
+        "changes/2026-09-12-PKG-AUDIO-01-contract.md",
+        "baselines/audio-track-contract.md",
+        "baselines/audio-track-release.json"
+      ]
     },
     {
       "id": "PKG-AUDIO-02",