docs: finish hierarchy rescan after rebase
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# side as of the last confirmed-consistent state. Both languages carry equal authority;
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# after editing either side, bring the other along and re-record with:
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# pnpm run verify-translation-pairing --write packages/host/directory-picker-auto/README.md
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README.md: 10d1784590b79fdfef3cf6683d389182cd8437b6
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README.zh.md: 468a698629061d105899013694ebb27d34bbda2c
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README.md: f1715566c8aff8be90cab381bcedd4732d0b41f6
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README.zh.md: 9fc8e539d40a126b30be6dce02257bd9abe37944
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@@ -4,7 +4,7 @@ English | [中文](README.zh.md)
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The **adaptive chooser** of the [directory-picker seam](../directory-picker/README.md): a node-half-only plugin that resolves the host's situation once at boot and mounts the matching dual-face backend — [`-native`](../directory-picker-native/README.md) or [`-browse`](../directory-picker-browse/README.md) — as a real Loader entry in the in-memory root tree (never persisted to a config file; the root tree's `write()` is a no-op). Because the backend arrives as an ordinary entry, its browser half is discovered by the client module table exactly as a config-row's would be, so the seam's one-row-swaps-both-faces invariant holds for the resolved choice. Unloading the chooser removes the entry again, unloading both faces with it.
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Resolution is one pure boot-time sample (`resolveDirectoryPickerBackend`), exported for reuse and tests. `native` requires every signal that the operator can see the host display and the native backend can serve it: a loopback-only bind (read from the injected `httpServer`; an all-interfaces bind admits remote browsers no OS chooser can reach), no SSH launch (`SSH_CONNECTION`/`SSH_TTY` unset or blank — under SSH port-forwarding the chooser would open on the unattended server), and a servable display session — assumed on darwin/win32; on linux `DISPLAY`/`WAYLAND_DISPLAY` plus a zenity or kdialog binary on `PATH` (the probe is one more boot-time fact); never on any other platform, since the native backend drives exactly darwin/win32/linux. Anything ambiguous resolves to `browse`, which works everywhere. The sample happens exactly once per boot so the mounted capability stays stable for the service lifetime, as the seam requires. Pinning an interaction is not a config field here — compose the `-native` or `-browse` row directly instead of this one, the seam's documented swap point; mounting the chooser **and** a backend row together fails loud (duplicate `directoryPicker` service, duplicate client flow in the `single` holes).
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Resolution is one pure boot-time sample (`resolveDirectoryPickerBackend`), exported for reuse. `native` requires every signal that the operator can see the host display and the native backend can serve it: a loopback-only bind (read from the injected `httpServer`; an all-interfaces bind admits remote browsers no OS chooser can reach), no SSH launch (`SSH_CONNECTION`/`SSH_TTY` unset or blank — under SSH port-forwarding the chooser would open on the unattended server), and a servable display session — assumed on darwin/win32; on linux `DISPLAY`/`WAYLAND_DISPLAY` plus a zenity or kdialog binary on `PATH` (the probe is one more boot-time fact); never on any other platform, since the native backend drives exactly darwin/win32/linux. Anything ambiguous resolves to `browse`, which works everywhere. The sample happens exactly once per boot so the mounted capability stays stable for the service lifetime, as the seam requires. Pinning an interaction is not a config field here — compose the `-native` or `-browse` row directly instead of this one, the seam's documented swap point; mounting the chooser **and** a backend row together fails loud (duplicate `directoryPicker` service, duplicate client flow in the `single` holes).
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## Model Experience
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[目录选择 seam](../directory-picker/README.md) 的**自适应选择器**:一个只有 node 半侧的插件,在启动时一次性判定宿主处境,并把匹配的双面后端——[`-native`](../directory-picker-native/README.md) 或 [`-browse`](../directory-picker-browse/README.md)——作为真实的 Loader 条目挂进内存根树(绝不持久化到配置文件;根树的 `write()` 是 no-op)。由于后端以普通条目的形式到达,其 browser half 被 client 模块表发现的方式与配置行完全相同,因此对判定出的选择,seam 的“一行同时换两面”不变式依然成立。卸载该选择器会再次移除该条目,连同两面一起卸载。
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判定是一次纯函数的启动时采样(`resolveDirectoryPickerBackend`),已导出供复用与测试。`native` 要求“操作者看得到宿主屏幕、且 native 后端能服务它”的全部信号:仅回环的绑定(从注入的 `httpServer` 读取;全网卡绑定会接入任何 OS 选择器都触及不到的远程浏览器);非 SSH 启动(`SSH_CONNECTION`/`SSH_TTY` 未设置或为空——SSH 端口转发下选择器会弹在无人值守的服务器上);以及可服务的显示会话——darwin/win32 上视为存在;linux 上要求 `DISPLAY`/`WAYLAND_DISPLAY`,外加 `PATH` 上有 zenity 或 kdialog 二进制(该探查是又一项启动时事实);其余任何平台上都不成立,因为 native 后端驱动的平台恰为 darwin/win32/linux。任何含糊情形都判定为处处可用的 `browse`。采样每次启动恰好发生一次,因此挂载的能力在服务生命周期内保持稳定,符合 seam 的要求。固定某种交互在这里不是配置字段——直接组合 `-native` 或 `-browse` 行来替代本行,那才是 seam 文档化的切换点;同时挂载选择器**和**某个后端行会大声失败(重复的 `directoryPicker` 服务、`single` 洞中的重复 client 流程)。
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判定是一次纯函数的启动时采样(`resolveDirectoryPickerBackend`),已导出供复用。`native` 要求“操作者看得到宿主屏幕、且 native 后端能服务它”的全部信号:仅回环的绑定(从注入的 `httpServer` 读取;全网卡绑定会接入任何 OS 选择器都触及不到的远程浏览器);非 SSH 启动(`SSH_CONNECTION`/`SSH_TTY` 未设置或为空——SSH 端口转发下选择器会弹在无人值守的服务器上);以及可服务的显示会话——darwin/win32 上视为存在;linux 上要求 `DISPLAY`/`WAYLAND_DISPLAY`,外加 `PATH` 上有 zenity 或 kdialog 二进制(该探查是又一项启动时事实);其余任何平台上都不成立,因为 native 后端驱动的平台恰为 darwin/win32/linux。任何含糊情形都判定为处处可用的 `browse`。采样每次启动恰好发生一次,因此挂载的能力在服务生命周期内保持稳定,符合 seam 的要求。固定某种交互在这里不是配置字段——直接组合 `-native` 或 `-browse` 行来替代本行,那才是 seam 文档化的切换点;同时挂载选择器**和**某个后端行会大声失败(重复的 `directoryPicker` 服务、`single` 洞中的重复 client 流程)。
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## 模型体验
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