dsh-workspace-switch-cost

Identified

Quantify what switching projects costs. Measures each workspace's cold-start overhead (AGENTS.md + skill catalog + tool schemas + runtime context), its steady state, and how many turns it takes to rea

dsh-workspace-switch-cost — 工作区切换成本（DSH 插件）

换个项目不是免费的：重新读 AGENTS.md、重新注入 60+ 个技能的描述、重新摸清工具集。这个插件量化「进一个工作区要烧多少上下文」，并建议哪些该常驻、哪些该归档。

安装

dsh plugin --profile desktop add @bushizhanghan/dsh-workspace-switch-cost

重启 DSH 后生效。只读。

Agent 工具

工具	作用
`wsc_audit`	量一个工作区的进入成本：冷启动四项开销、稳态值、几轮到达稳态
`wsc_compare`	横向对比多个工作区，并归因：哪个因素真的解释了成本差异
`wsc_recommend`	按「进入成本 × 访问频率」给出常驻 / 归档 / 观望的建议

冷启动的四个开销项

项	来源
`agents-md`	全局与项目 AGENTS.md 的注入
`skill-catalog`	每轮注入的技能目录（60+ 个技能就是 60+ 条描述）
`tools`	工具 schema 的 JSON 定义
`runtime-context`	运行时快照

稳态值（steady state）是会话进入正常工作后的每轮注入量，进入开销 = 冷启动 − 稳态。

归因的门槛

wsc_compare 的归因需要 ≥3 个工作区才能算相关性。少于 3 个时它明确说「数据不够」而不是编一个结论——两个点之间永远能画出一条完美直线，那不是洞察。

同样，某个因素在所有工作区之间没有差异时，它被标注为「这是 profile 的属性，不是这个项目的属性」，不会当成发现卖给你。

设计取舍

用中位数不用均值：一个 26000 事件的会话不该定义整个工作区的进入成本。
slug 从会话路径反推：<sessions>/<workspace-slug>/<session-id>/session.v4.jsonl.zstd，所以显式给一个 session 时也能报出它属于哪个工作区，而不是 slug: null。
确定性：全部为字符/token 计数与中位数，不调 LLM。

开发

node --test test/    # 38 个单测 + 21 项集成测试

License

MIT

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