fix(windows): make native coverage graph portable

packages/skill/skill-local/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/skill/skill-local/README.md
-README.md: 6d3d97ea34308ccc920d0b42c5a220dd7a9d6d73
-README.zh.md: 9948369774bc08a4ddbd4e518b53134ddd7c6882
+README.md: dc2e97f89349a85ce548e5f6f1b01408eb32a293
+README.zh.md: 0c17d9fb77af3df2071613c2c6b8fc15086581a7

packages/skill/skill-local/README.md

@@ -48,7 +48,7 @@ Existing skill roots are watched with Chokidar. Before opening a native watcher,
 
 A root that does not exist is followed from the nearest existing ancestor one missing path segment at a time. The next segment is probed with `fs.watchFile`; once `.agents`, `skills`, or the configured root appears, observation advances until Chokidar can attach to the real root. Root deletion reverses this process, so deleting and recreating an entire skills directory remains observable. Project-scoped watchers are bounded by `watchMaxProjects`; revisiting an evicted project reattaches observation during discovery.
 
-The first-party filesystem `write` and `edit` tools also synchronously invalidate the provider through `fs/observed` when their target could affect a watched skill entry. This fast path makes the next model step observe its own filesystem mutation without waiting for the host watcher. External IDE, Git, shell, and process changes rely on Chokidar or the missing-path probe. Startup/runtime watcher failures are logged and retried. Discovery still scans readable roots and returns their candidates for direct loading, but marks the observation incomplete so it is not cached or published as an authoritative model catalog. Effect teardown closes every watcher and contains late callbacks.
+The first-party filesystem `write` and `edit` tools also synchronously invalidate the provider through `fs/observed` when their target could affect a watched skill entry. This fast path makes the next model step observe its own filesystem mutation without waiting for the host watcher. External IDE, Git, shell, and process changes rely on Chokidar or the missing-path probe. Existing-root watchers remain persistent until effect teardown so Chokidar owns asynchronous native error events; startup/runtime watcher failures are logged and retried. Discovery still scans readable roots and returns their candidates for direct loading, but marks the observation incomplete so it is not cached or published as an authoritative model catalog. Effect teardown closes every watcher and contains late callbacks.
 
 ## Skill Format
 

packages/skill/skill-local/README.zh.md

@@ -48,7 +48,7 @@
 
 不存在的根会从最近的现有祖先开始，每次沿一个缺失路径段跟踪。系统使用 `fs.watchFile` 探测下一段；当 `.agents`、`skills` 或已配置的根出现后，观察会逐级推进，直至 Chokidar 可以附加到真实根。根删除时，该过程反向执行，因此删除再重建整个 skills 目录仍可被观察到。按项目划分的 watcher 数量受 `watchMaxProjects` 限制；再次访问已被驱逐的项目时，发现阶段会重新附加观察。
 
-如果第一方文件系统 `write` 和 `edit` 工具的目标可能影响受监视的 skill 条目，它们还会通过 `fs/observed` 同步使提供方失效。这条快速路径让模型的下一个步骤无需等待宿主 watcher，即可观察到自身的文件系统变更。外部 IDE、Git、shell 和进程产生的变更依赖 Chokidar 或缺失路径探测。watcher 启动或运行时失败会被记录并触发重试。发现过程仍会扫描可读根目录，并返回其候选项供直接加载，但会将观测标记为不完整，因此不会缓存，也不会作为权威模型目录发布。effect 释放会关闭所有 watcher，并收束延迟回调。
+如果第一方文件系统 `write` 和 `edit` 工具的目标可能影响受监视的 skill 条目，它们还会通过 `fs/observed` 同步使提供方失效。这条快速路径让模型的下一个步骤无需等待宿主 watcher，即可观察到自身的文件系统变更。外部 IDE、Git、shell 和进程产生的变更依赖 Chokidar 或缺失路径探测。现有根的 watcher 会保持持久状态直至 effect 释放，使 Chokidar 能够接管异步原生错误事件；watcher 启动或运行时失败会被记录并触发重试。发现过程仍会扫描可读根目录，并返回其候选项供直接加载，但会将观测标记为不完整，因此不会缓存，也不会作为权威模型目录发布。effect 释放会关闭所有 watcher，并收束延迟回调。
 
 ## skill 格式
 

packages/skill/skill-local/src/index.ts

@@ -487,7 +487,9 @@ class SkillWatchManager {
 
   private async openRootWatcher(state: RootWatchState, mode: Extract<RootWatchMode, { kind: 'root' }>): Promise<WatchHandle> {
     const watcher = chokidar.watch(mode.anchor, {
-      persistent: false,
+      // Chokidar owns late native fs.watch errors only for persistent watchers;
+      // this provider's effect explicitly closes every handle at teardown.
+      persistent: true,
       ignoreInitial: true,
       depth: 1,
       followSymlinks: this.config.followSymlinks,

packages/skill/skill-local/tests/skill-local-watcher.spec.ts

@@ -132,6 +132,7 @@ describe('skill-local watcher failures', () => {
 
     expect((await ctx.skills.list()).map(skill => skill.name)).toEqual(['canonical-skill'])
     expect(watcherHarness.watchers[0]?.path).toBe(await realpath(root))
+    expect(watcherHarness.watchers[0]?.options.persistent).toBe(true)
     await fiber.dispose()
   })