6758da87ae
One settings row picking which preset new sessions are composed from. It is deliberately a new-session preference, not a live switch: a session's preset is fixed at creation and the host refuses to adopt an existing session under a different one, so the row says "applies to sessions you start from now on" rather than implying it can retune a running agent. Options and the current value come from one `agentPreset.list` call — the roster already reports which id an unspecified session gets, so the row needs no settings-schema introspection, unlike the permission row it is modelled on. The write targets only the namespace's `default` field. The menu marks `user` rows: a locally authored preset is exactly as privileged as the plugins it names, and presenting it identically to a shipped one would hide that. An empty roster reads as `unavailable` and renders nothing, because composing no presets is a valid deployment rather than a failure — distinct from a roster call that failed, which surfaces its message.
36 lines
2.3 KiB
Markdown
36 lines
2.3 KiB
Markdown
# dsh-client-ui-agent-preset
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[English](README.md) | 中文
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agent preset 表层：General 设置中的一行，用于选择新建会话据以组装的 [preset](../../preset/agent-presets/README.md)。
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## 为什么它是"新建会话"的偏好设置
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会话的 preset 在创建时即固定——宿主拒绝以不同 preset 接管已存在的会话，因为该会话的历史是在最初那份 preset 的工具下产生的。因此本行不可能是实时切换，它也如实说明了这一点：更改只对此后开启的会话生效，而运行中的会话保持它们开始时的组装。
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## 它读什么、写什么
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选项与当前默认值都来自同一次 `agentPreset.list` 调用。名单本身已经报告了"未显式选择的会话会得到哪个 id"，因此本行无需对 settings schema 做内省；写入目标是 `agent-presets` settings 命名空间的 `default` 字段，也正是宿主在创建时解析的那个字段。
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本地创作的 preset 的权限恰好等于它所引用的插件，因此列表会标注 `user` 行，而不是把每个 preset 都呈现为随附且已审核的。
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本行在自身命名空间的 `settings/changed` 以及 `connection/reset` 时重新读取：名单是一个活动目录，默认值是一项设置，外部编辑与重新连接都可能改变它。
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## 何时不显示本行
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未组装任何 preset 的部署返回空名单，本行不渲染任何内容——此时每个会话共用宿主组装，也就无从选择。
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## Model Experience
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Indirectly, through the preset a later session is composed from; [`dsh-agent-presets`](../../preset/agent-presets/README.md) owns what that composition puts in front of the model.
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#### KV Cache effect
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没有直接的失效影响。更改默认值绝不触及运行中会话的前缀；此后创建的会话依据它自己的组装建立自己的前缀。
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## Known Limitations and Deferred Work
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- **创建时无法逐会话选择** —— 本行只设置默认值。wire 上 `session.create` 已经携带 `agentPreset`，因此会话开启表层可以提供该选择；该表层尚不存在。
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- **preset 按 id 列出** —— preset 不携带展示用元数据，因此菜单显示的是目录名。
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- **不提供创作能力** —— 创建、编辑或删除 preset 是文件系统行为；本表层只在名单提供的范围内做选择。
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