diff --git a/docs/协作/B02-需求.md b/docs/协作/B02-需求.md
new file mode 100644
index 0000000..f11b72c
--- /dev/null
+++ b/docs/协作/B02-需求.md
@@ -0,0 +1,83 @@
+# B02：推荐技能的已安装样式与重复入口
+
+日期：2026-10-21（Asia/Shanghai）。状态：**待开发**。用户新增需求，不改变 B01 的范围、交付或验收结论。
+
+用户要求：“专家技能连接器这块的技能，已经安装的在推荐中的样式也不对，还保留有添加的按钮，参考一下 WorkBuddy。还有下方也不应该有查看已安装技能，这个要移除掉。”
+
+## 1. 已确认问题与复现
+
+接收时 `gitea/master` 为 `ddd677bae3c43a5514eb40f7a1d9749fdf389115`。独立窗口使用既有固定代码 `51531dcae8d8ade85db9e203bc8c0f712805b2ae`，对应推荐技能组件、样式、CardFrame 与测试从该提交到接收版本无改动。
+
+Windows Electron 加载真实 `CapabilityCenter`、推荐技能组件和 CSS，使用受控 IPC、临时 userData 与模拟安装结果，不下载网络包或改用户技能。安装后关闭详情，推荐列表实测：
+
+```text
+data-recommendation-state = current
+卡片 class = sm-card，没有 sm-card--installed
+添加按钮仍存在，disabled=true，按钮中仍有 Plus SVG
+原动作槽位没有 sm-use-btn
+卡片下方另有“去使用”文字动作
+列表底部存在“查看已安装技能”按钮
+renderer errors = []
+```
+
+所以不是“完全没有识别到已安装”，而是**识别成功后，卡片仍渲染添加动作与未安装壳**。不能把仅禁用加号当作完成样式修复。
+
+源码定位：
+
+- `src/renderer/src/capabilities/RecommendedSkills.tsx:259`：`Card` 没有传 installed 身份；actions 无条件创建 `.sm-add-btn` 和 `PlusIcon`，current 状态只影响 disabled。
+- `RecommendedSkills.tsx:263`：独立 footer 按钮“查看已安装技能”。
+- `RecommendedSkills.tsx:247`：目录不可用分支也有同名入口，需与正常列表的移除要求一并检查，不要留下另一处无依据的底部重复入口。
+- `src/renderer/src/capabilities/SkillsPage.tsx:103`：推荐页当前的 installed 导航 callback；顶部已有“已安装(n)”入口，应保留这一条正常导航。
+- `scripts/test-recommended-skills-ui.mjs:232`：旧测试要求 `.sm-add-btn.disabled === true`；`:241` 附近依赖 footer 按钮进入已安装。这两处把当前错误设计写进了测试，需同步修正。
+
+证据：[实测状态](evidence/B02-01/installed-state.json)、[推荐列表截图](evidence/B02-01/installed-recommendation-list.png)、[只读窗口探针](evidence/B02-01/skills-installed-probe.mjs)。
+
+## 2. WorkBuddy 依据与未验证边界
+
+可复用的已有 REA 恢复记录：
+
+- `src/renderer/src/capabilities/skills-source-manifest.json` 标注 WorkBuddy **5.8.2**，原包 SHA-256 `035254bc76310ea46317433e4840602094543ef323d2d5c5aff7c131729de918`。
+- Evidence：JavaScript `ev_717fa5e846e64d67ac19c8925d121bff632c0d3aefb3603b10858559cabb2dcb`，技能市场相关 `ev_e8faf60b3d22b99ede302f2d0efdfb3145f53f59789d4a345f5892dc13a589a4`，CSS `ev_377c8790468b3c67dad8577aabb327f98d3140659f0fffdbabfcff5a40cc9e94`。
+- 该恢复链在项目中已有 `CardFrame.installed`／`sm-card--installed`、`UseSkillIcon` 与 `.sm-use-btn`。已恢复 CSS 的使用动作是 24×24px、默认透明背景、16px SVG；与未安装 `.sm-add-btn` 的 24×24px 灰底、12px SVG 不同。
+- [技能详情安装与使用链路修正](../技能详情安装与使用链路修正-2026-10-20.md) 第原版边界部分记录：历史原版 ActionRow 随安装状态切换安装／使用，成功提示带使用动作。不要把“＋保留但禁用”当作原版已安装设计。
+
+**本次当前版本并未完整核验**：
+
+- 本轮仅通过 REA 静态读取当前安装包，没有用直接 CDP、手写提取器、computer-use 或其他通道绕过。
+- 当前 ASAR SHA-256 为 `026a1d0805a2366d06390cef52e157a7277543cdd27dd308e6b1acb47ffffdc1`，版本号未读取确认，不能继续写成 5.8.2／5.8.3。
+- REA 父 Evidence `ev_ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849`，摘要 Evidence `ev_4d76ad1b9f386f97343307067ee2f5b5b91d2189366ab1cbe3890954db4634a6`。本次选择的源文件是 `renderer/assets/src-DbE1_mgM.js`，不是当前完整技能市场组件；存在完整性矛盾、未选文件和语义覆盖上限，**不据此对当前技能市场样式作结论**。
+- REA 整包提取又因缺失声明的 Darwin companion `cli/node_modules/koffi/build/koffi/darwin_arm64/koffi.node` 失败。没有绕过改用其他提取器，也没有启动 WorkBuddy 去安装测试技能。
+- [完整摘要记录](evidence/B02-01/rea-summary-record.json)、[REA 提取限制](evidence/B02-01/rea-extract-limitation.json) 已提交。父 Evidence 的大型 bundle 仅保留于验收端临时证据，不把其路径当作跨机交接的唯一依据。
+
+开发可依据已有恢复组件和用户明确要求先修确认问题；当前原版推荐卡是否另有状态图标、精确操作位置及复杂安装态细节，须后续通过 REA 补同状态证据，未拿到不能宣称完整 1:1。
+
+## 3. 开发任务与验收标准
+
+### YC-005 / P2：推荐卡片切换真实已安装状态
+
+允许边界：`RecommendedSkills.tsx`、`SkillsPage.tsx`、推荐局部 CSS／既有卡片适配、相关 UI 回归。原版恢复组件本体、共享卡片与技能身份模型如需变更，由开发主对话统一审查；不重写安装下载后端或扩展市场服务。
+
+- **AC5.1**：同推荐身份、同来源版本的 current 安装项，卡片不再渲染添加 Plus 按钮，不仅是禁用或透明隐藏；使用与已安装语义一致的卡片状态和动作。辅助技术标签也不能继续叫“安装某技能”。
+- **AC5.2**：按既有 REA 恢复记录实现原版的已安装／使用展示，核对布局、图标槽位、字体、默认／hover／focus 与浅深色；不要把文字“已安装”加在角落就认定完成。
+- **AC5.3**：未安装项仍可添加并显示真实安装进度；安装成功后自动切换，关闭／重开页面及外部安装／卸载通知后状态同步，不要求重启。
+- **AC5.4**：禁用、不可调用、损坏、同名本地、版本不同、本地修改、工作区技能等状态仍明确区分。不要只按同名或当前标签把不同来源／scope 误认为同一个已安装技能；保留已有保护工作区和本地修改的规则。
+- **AC5.5**：版本不同／本地修改等确有替换需求时，用清楚的更新／替换动作及既有确认流程，不伪装成首次添加，也不直接覆盖。正常 current 状态不发重复安装请求。
+- **AC5.6**：使用动作保留既有进入新任务草稿、不自动发送的语义；禁用技能先启用及失败反馈保持。原动作槽位与卡片下方不要同时留下无依据的重复使用按钮；按原版证据确定位置。
+
+### YC-006 / P2：移除底部“查看已安装技能”
+
+- **AC6.1**：正常推荐列表底部不再渲染 `.yc-skill-recommendation-footer` 及“查看已安装技能”按钮，清理只服务于该入口的空白、样式和 props；不能只是 CSS 隐藏。
+- **AC6.2**：保留顶部“已安装(n)”导航及真实计数，进入已安装、返回推荐、搜索与目录刷新仍正常。
+- **AC6.3**：复核目录不可用／空状态中的重复同名入口；保持清楚的错误与恢复方式，使用现有顶部导航，不为删除正常 footer 而留下另一个底部重复入口。未使用的 callback 清理要核对所有分支与调用方。
+- **AC6.4**：测试通过顶部现有入口进入已安装，新增断言 footer 不存在；不允许为旧测试便利保留用户明确要求移除的按钮。
+
+## 4. 验证与交付
+
+- 必跑 `npm run test:recommended-skills:ui`、相关能力输入／技能管理回归，以及 `npm run build`。源码／class 检查不能替代实际已安装推荐卡的计算样式、截图与交互。
+- 受控 Electron fixture 覆盖未安装→安装→current、禁用／损坏、不同来源与版本、本地修改、卸载／重装及目录错误；不得使用用户真实技能或为验样式安装 WorkBuddy 技能。
+- 对已有 UI 脚本中的“禁用 Plus 即通过”和 footer 导航断言改成真实目标，保留安装确认、进度、取消、重复请求、外部通知、使用草稿等有效回归。
+- Windows 浅／深、窄窗下记录相同状态的 DOM、计算样式和截图；同版本 WorkBuddy 对照尚缺则明确“未验证”，不将本地恢复样式称为像素通过。
+- 本次复现探针在固定受测检出运行：独立安装依赖后，将 Git 中的 `skills-installed-probe.mjs` 复制为 `.tmp/b01-acceptance/skills-installed-probe.mjs` 再执行。该路径用于其自身 Electron 子进程启动；脚本只用受控宿主，不真实安装。
+- 创建 `docs/协作/B02-交付-01.md` 接单、记录完整代码 SHA、逐项 AC、命令及证据。不要预填验收通过；不把此项混入 B01／YC-001 的修复完成声明。
+
+本次只发布新需求和证据，**未修改产品代码**。文档推送成功后窗口交回开发端，用户可将 B02 与 B01 的后续安排一并交给开发对话。
diff --git a/docs/协作/evidence/B02-01/installed-recommendation-list.png b/docs/协作/evidence/B02-01/installed-recommendation-list.png
new file mode 100644
index 0000000..a3f0f32
Binary files /dev/null and b/docs/协作/evidence/B02-01/installed-recommendation-list.png differ
diff --git a/docs/协作/evidence/B02-01/installed-state.json b/docs/协作/evidence/B02-01/installed-state.json
new file mode 100644
index 0000000..14d1164
--- /dev/null
+++ b/docs/协作/evidence/B02-01/installed-state.json
@@ -0,0 +1,16 @@
+{
+  "codeSha": "51531dcae8d8ade85db9e203bc8c0f712805b2ae",
+  "installedState": {
+    "state": "current",
+    "cardClasses": "sm-card",
+    "installedClass": false,
+    "addButtonPresent": true,
+    "addButtonDisabled": true,
+    "addSvgPresent": true,
+    "useSlotPresent": false,
+    "footerPresent": true,
+    "footerText": "查看已安装技能"
+  },
+  "errors": [],
+  "scope": "Actual recommended-skill component and CSS in Electron with controlled host; no network or actual skill installation"
+}
\ No newline at end of file
diff --git a/docs/协作/evidence/B02-01/rea-extract-limitation.json b/docs/协作/evidence/B02-01/rea-extract-limitation.json
new file mode 100644
index 0000000..b5e4df9
--- /dev/null
+++ b/docs/协作/evidence/B02-01/rea-extract-limitation.json
@@ -0,0 +1 @@
+{"error":"Analysis failed","code":"artifact_operation_failed","category":"unavailable","message":"ASAR unpacked companion bytes are unavailable for cli/node_modules/koffi/build/koffi/darwin_arm64/koffi.node. Select the archive in place with its .unpacked directory beside it, then retry.","retryable":false,"remediation":{"action":"ASAR unpacked companion bytes are unavailable for cli/node_modules/koffi/build/koffi/darwin_arm64/koffi.node. Select the archive in place with its .unpacked directory beside it, then retry."},"details":{"logical_path":"cli/node_modules/koffi/build/koffi/darwin_arm64/koffi.node","declared_sha256":null,"calculated_sha256":null,"unpacked":true}}
diff --git a/docs/协作/evidence/B02-01/rea-summary-record.json b/docs/协作/evidence/B02-01/rea-summary-record.json
new file mode 100644
index 0000000..288e3ab
--- /dev/null
+++ b/docs/协作/evidence/B02-01/rea-summary-record.json
@@ -0,0 +1,419 @@
+{
+  "analysis_profile": null,
+  "authority": "shipped-artifact",
+  "confidence": "derived",
+  "environment": null,
+  "evidence_id": "ev_4d76ad1b9f386f97343307067ee2f5b5b91d2189366ab1cbe3890954db4634a6",
+  "evidence_links": [
+    "ev_ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849"
+  ],
+  "limitations": [
+    "Artifact integrity metadata contradicts observed bytes at cli/bin/native/win32-x64/job-object.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty/OpenConsole.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty_console_list.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty/package.json; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/build/koffi/win32_x64/koffi.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/package.json; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/src/cnoke/package.json; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/genie-trash/win32-x64.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/ripgrep/x64-win32/rg.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/ripgrep/x64-win32/ripgrep.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/betterleaks.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-center.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-cli-gc.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-cli.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox_ffi.dll; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbx.dll; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbx_sdk.dll; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbxldr.dll; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbxlow.dll; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at cli/vendor/wecom-cli/wecom-cli.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at native/perf-metrics/build/Release/perf_metrics.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at native/turing-sdk/build/Release/turing_sdk.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at native/wechat-copydata-decoder/build/Release/wechat_copydata_decoder.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at node_modules/@ban-dal/os-bridge-win32-x64-msvc/os-bridge.win32-x64-msvc.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty/OpenConsole.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty_console_list.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/qimei-node/build/Release/qimei.node; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/tencent-docs-ai-engine/bin/win32-x64/editor_sdk.exe; the observed bytes are untrusted.",
+    "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/wwapi-electron/prebuilds/win32-x64/node.napi.node; the observed bytes are untrusted.",
+    "34 additional limitations omitted from this view; consult source parent Evidence ev_ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849 for the complete list (the caller-supplied record, or its retaining session)."
+  ],
+  "locations": [
+    {
+      "kind": "artifact-path",
+      "path": "C:\\Users\\Administrator\\AppData\\Local\\Programs\\WorkBuddy\\resources\\app.asar"
+    }
+  ],
+  "normalized_result": {
+    "artifact": {
+      "path": "C:\\Users\\Administrator\\AppData\\Local\\Programs\\WorkBuddy\\resources\\app.asar",
+      "sha256": "026a1d0805a2366d06390cef52e157a7277543cdd27dd308e6b1acb47ffffdc1"
+    },
+    "coverage": {
+      "examined": 7200,
+      "exhausted": true,
+      "next_offset": null,
+      "status": "complete-within-view",
+      "total": 30363
+    },
+    "kind": "summary",
+    "limitations": [
+      "Artifact integrity metadata contradicts observed bytes at cli/bin/native/win32-x64/job-object.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty/OpenConsole.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty_console_list.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty/package.json; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/build/koffi/win32_x64/koffi.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/package.json; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/src/cnoke/package.json; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/genie-trash/win32-x64.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/ripgrep/x64-win32/rg.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/ripgrep/x64-win32/ripgrep.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/betterleaks.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-center.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-cli-gc.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-cli.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox_ffi.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbx.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbx_sdk.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbxldr.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbxlow.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/wecom-cli/wecom-cli.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at native/perf-metrics/build/Release/perf_metrics.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at native/turing-sdk/build/Release/turing_sdk.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at native/wechat-copydata-decoder/build/Release/wechat_copydata_decoder.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@ban-dal/os-bridge-win32-x64-msvc/os-bridge.win32-x64-msvc.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty/OpenConsole.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty_console_list.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/qimei-node/build/Release/qimei.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/tencent-docs-ai-engine/bin/win32-x64/editor_sdk.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/wwapi-electron/prebuilds/win32-x64/node.napi.node; the observed bytes are untrusted.",
+      "34 additional limitations omitted from this view; consult source parent Evidence ev_ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849 for the complete list (the caller-supplied record, or its retaining session)."
+    ],
+    "parent_digest": "ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849",
+    "parent_evidence_id": "ev_ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849",
+    "parent_operation": "analyze_javascript_application",
+    "summary": {
+      "coverage": {
+        "application": {
+          "limits": [],
+          "omitted_count": null,
+          "status": "partial",
+          "truncated": false
+        },
+        "application_unknowns": 11145,
+        "semantic": {
+          "families": [
+            {
+              "family": "boundary",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6667
+            },
+            {
+              "family": "call-flow",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6667
+            },
+            {
+              "family": "child-process",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6667
+            },
+            {
+              "family": "closure",
+              "omitted_relations": null,
+              "retained_relations": 5729,
+              "status": "partial",
+              "unknown_count": 6667
+            },
+            {
+              "family": "configuration",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6667
+            },
+            {
+              "family": "data-flow",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 18596
+            },
+            {
+              "family": "event",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6667
+            },
+            {
+              "family": "object-flow",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 14738
+            },
+            {
+              "family": "promise-ownership",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6666
+            },
+            {
+              "family": "request",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6666
+            },
+            {
+              "family": "resource-lifecycle",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6666
+            },
+            {
+              "family": "timer",
+              "omitted_relations": null,
+              "retained_relations": 0,
+              "status": "partial",
+              "unknown_count": 6666
+            }
+          ],
+          "limits": [
+            {
+              "name": "semantic_graph_file_node_ceiling",
+              "unit": "items",
+              "value": 20000
+            },
+            {
+              "name": "semantic_graph_file_unknown_ceiling",
+              "unit": "items",
+              "value": 20000
+            },
+            {
+              "name": "semantic_graph_node_ceiling",
+              "unit": "items",
+              "value": 100000
+            },
+            {
+              "name": "semantic_graph_unknown_ceiling",
+              "unit": "items",
+              "value": 100000
+            }
+          ],
+          "omitted_nodes": null,
+          "omitted_relations": null,
+          "omitted_unknown_occurrences": [
+            {
+              "family": "boundary",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "call-flow",
+              "occurrences": 23349,
+              "reason": "dynamic-call"
+            },
+            {
+              "family": "call-flow",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "child-process",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "closure",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "configuration",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "data-flow",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "event",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "object-flow",
+              "occurrences": 25351,
+              "reason": "ambiguous-target"
+            },
+            {
+              "family": "object-flow",
+              "occurrences": 1541,
+              "reason": "dynamic-property"
+            },
+            {
+              "family": "object-flow",
+              "occurrences": 3618,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "promise-ownership",
+              "occurrences": 3619,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "request",
+              "occurrences": 3619,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "resource-lifecycle",
+              "occurrences": 3619,
+              "reason": "incomplete-module"
+            },
+            {
+              "family": "timer",
+              "occurrences": 67,
+              "reason": "ambiguous-target"
+            },
+            {
+              "family": "timer",
+              "occurrences": 3619,
+              "reason": "incomplete-module"
+            }
+          ],
+          "status": "partial",
+          "truncated": true
+        },
+        "semantic_unknowns": 100000
+      },
+      "electron": {
+        "browser_windows": 0,
+        "context_bridge_apis": 0,
+        "explicit_web_preferences": 0,
+        "exposed_api_members": 0,
+        "ipc": {
+          "ambiguous_renderer_transmissions": 0,
+          "dynamic_channel_operations": 0,
+          "literal_channels": 0,
+          "main_handlers": 0,
+          "operations": 0,
+          "paired_renderer_transmissions": 0,
+          "renderer_listeners": 0,
+          "renderer_transmissions": 0,
+          "unpaired_literal_renderer_transmissions": 0
+        },
+        "native_addon_bindings": 0,
+        "preload_entrypoints": 0,
+        "resolved_native_addon_bindings": 0,
+        "resolved_utility_entrypoints": 0,
+        "sender_validation_observations": 1,
+        "utility_processes": 0
+      },
+      "format": "asar",
+      "input_path": "C:\\Users\\Administrator\\AppData\\Local\\Programs\\WorkBuddy\\resources\\app.asar",
+      "limitation_count": 53,
+      "root_artifact_sha256": "026a1d0805a2366d06390cef52e157a7277543cdd27dd308e6b1acb47ffffdc1",
+      "source_selection": {
+        "requested_paths": [
+          "renderer/assets/src-DbE1_mgM.js"
+        ],
+        "unselected_files": 11183
+      },
+      "statistics": {
+        "findings": 678,
+        "invalid_utf8_files": 0,
+        "modules": 0,
+        "nested_asar_containers": 0,
+        "parse_failures": 0,
+        "parsed_javascript_files": 1,
+        "relevant_files": 11211,
+        "skipped_javascript_files": 0,
+        "text_bytes_read": 1968427,
+        "visited_ast_nodes": 415338
+      }
+    },
+    "unknowns": [
+      "100000 semantic graph unknowns remain in the parent Evidence.",
+      "11145 application graph unknowns remain in the parent Evidence.",
+      "Artifact integrity metadata contradicts observed bytes at cli/bin/native/win32-x64/job-object.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty/OpenConsole.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty_console_list.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/@lydell/node-pty/package.json; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/build/koffi/win32_x64/koffi.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/package.json; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/node_modules/koffi/src/cnoke/package.json; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/genie-trash/win32-x64.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/ripgrep/x64-win32/rg.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/ripgrep/x64-win32/ripgrep.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/betterleaks.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-center.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-cli-gc.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox-cli.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/sandbox_ffi.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbx.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbx_sdk.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbxldr.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/sandbox/5.8.6/tsbxlow.dll; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at cli/vendor/wecom-cli/wecom-cli.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at native/perf-metrics/build/Release/perf_metrics.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at native/turing-sdk/build/Release/turing_sdk.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at native/wechat-copydata-decoder/build/Release/wechat_copydata_decoder.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@ban-dal/os-bridge-win32-x64-msvc/os-bridge.win32-x64-msvc.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty/OpenConsole.exe; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@lydell/node-pty-win32-x64/prebuilds/win32-x64/conpty_console_list.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/qimei-node/build/Release/qimei.node; the observed bytes are untrusted.",
+      "Artifact integrity metadata contradicts observed bytes at node_modules/@tencent/tencent-docs-ai-engine/bin/win32-x64/editor_sdk.exe; the observed bytes are untrusted.",
+      "graph.coverage.status is partial",
+      "semantic_graph.coverage.status is partial",
+      "35 additional unknowns omitted from this view; consult source parent Evidence ev_ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849 for the complete list (the caller-supplied record, or its retaining session)."
+    ],
+    "view": {
+      "kind": "summary"
+    },
+    "view_digest": "f6bfbc925ceccbfd39e72ae31b623c5c3d5c07b9cedba7f03f15d923ab0fbf8b"
+  },
+  "operation": "inspect_analysis_view",
+  "parameters": {
+    "parent_evidence_id": "ev_ef70f1417c069be6bf352efcb858244efaae444f71f1f9893ed2fb579ed88849",
+    "view": {
+      "kind": "summary"
+    }
+  },
+  "predicate_type": "rea.analysis-view",
+  "provider": {
+    "id": "rea-analysis-view",
+    "name": "REA analysis view projection",
+    "version": "1"
+  },
+  "raw_result": null,
+  "relationship_coverage": null,
+  "subject": {
+    "architecture": null,
+    "digest": {
+      "sha256": "026a1d0805a2366d06390cef52e157a7277543cdd27dd308e6b1acb47ffffdc1"
+    },
+    "format": "asar",
+    "local_path": "C:\\Users\\Administrator\\AppData\\Local\\Programs\\WorkBuddy\\resources\\app.asar",
+    "name": "app.asar"
+  }
+}
diff --git a/docs/协作/evidence/B02-01/skills-installed-probe.mjs b/docs/协作/evidence/B02-01/skills-installed-probe.mjs
new file mode 100644
index 0000000..9ef56e4
--- /dev/null
+++ b/docs/协作/evidence/B02-01/skills-installed-probe.mjs
@@ -0,0 +1,386 @@
+/** Isolated Electron fixture for the recommended-skill page.
+ * The host is fully controlled: no network, no real skill storage, no user data. */
+import fs from 'node:fs'
+import path from 'node:path'
+import assert from 'node:assert/strict'
+import { createRequire } from 'node:module'
+import { spawn } from 'node:child_process'
+
+const require = createRequire(import.meta.url)
+const electronModule = require('electron')
+const electron = typeof electronModule === 'object' && electronModule.app ? electronModule : null
+const repository = path.resolve('.'), base = path.join(repository, '.tmp')
+
+if (!electron) {
+  fs.mkdirSync(base, { recursive: true })
+  const output = fs.mkdtempSync(path.join(base, 'recommended-skills-ui-'))
+  const env = { ...process.env }
+  delete env.ELECTRON_RUN_AS_NODE
+  delete env.ELECTRON_RENDERER_URL
+  const child = spawn(electronModule, ['--no-sandbox', '--disable-gpu-sandbox', path.resolve('.tmp/b01-acceptance/skills-installed-probe.mjs'), output], { stdio: 'inherit', windowsHide: true, env })
+  const timer = setTimeout(() => child.kill(), 120000)
+  process.exitCode = await new Promise(resolve => child.on('exit', code => { clearTimeout(timer); resolve(code ?? 1) }))
+} else {
+  void (async () => {
+    const { app, BrowserWindow, ipcMain } = electron
+    const output = path.resolve(process.argv.at(-1)), relative = path.relative(base, output)
+    assert.ok(relative.startsWith('recommended-skills-ui-') && !relative.includes('..') && !path.isAbsolute(relative))
+    const userData = path.join(output, 'data')
+    fs.mkdirSync(userData, { recursive: true })
+    app.setPath('userData', userData)
+    const checks = [], errors = [], calls = [], screenshots = []
+
+    const recommendation = {
+      id: 'archify',
+      name: 'Archify',
+      description: '生成可交互的架构图、流程图和一页式说明',
+      author: 'tt-a1i',
+      license: 'MIT',
+      repository: 'tt-a1i/archify',
+      version: '3.2.0',
+      commit: '25cf37080fc8b1dbe758a4efc3935b55f3327083',
+      packagePath: 'archify.zip',
+      sha256: '70e210265c59f24dcbdf2a502ff671104b5454e7ee7d3554aecd86bad32384f5',
+      expectedBytes: 5271959,
+      containsScripts: true
+    }
+    const localSkill = {
+      id: 'user:local', name: 'Archify', description: '本地导入的同名技能', version: '1.0.0',
+      path: 'C:/local/archify', scope: 'user', enabled: true, userInvocable: true,
+      disableModelInvocation: false, source: 'imported', userModified: true
+    }
+    const installedRecommendation = {
+      id: 'user:rec', name: 'Archify', description: recommendation.description, version: '3.2.0',
+      path: 'C:/managed/archify', scope: 'user', enabled: true, userInvocable: true,
+      disableModelInvocation: false, source: 'imported', userModified: false,
+      origin: {
+        recommendationId: 'archify', repository: recommendation.repository, commit: recommendation.commit,
+        packagePath: recommendation.packagePath, archiveSha256: recommendation.sha256, version: '3.2.0', installedAt: 1
+      }
+    }
+
+    let installed = [], progress = null, failNext = false, cancelRequested = false, delay = 0, recommendationOverride = null, recommendationFails = false
+    let clock = 0
+    const listeners = new Set(), changedListeners = new Set()
+    const emit = state => {
+      // The host stamps a monotonic time; a strict comparison rejects a stale frame.
+      const stamped = { ...state, updatedAt: ++clock }
+      progress = stamped
+      for (const listener of listeners) listener(stamped)
+      for (const win of BrowserWindow.getAllWindows()) if (!win.isDestroyed()) win.webContents.send('skills:install-progress', stamped)
+    }
+    const changed = () => {
+      for (const listener of changedListeners) listener()
+      for (const win of BrowserWindow.getAllWindows()) if (!win.isDestroyed()) win.webContents.send('skills:changed')
+    }
+
+    ipcMain.handle('skills-qa', async (_event, method, args) => {
+      calls.push([method, ...args])
+      if (method === 'recommendations') {
+        if (recommendationFails) throw Error('推荐目录服务不可用')
+        return recommendationOverride ?? [recommendation]
+      }
+      if (method === 'list') return installed
+      if (method === 'setEnabled') { installed = installed.map(skill => skill.id === args[0] ? { ...skill, enabled: args[1] } : skill); changed(); return }
+      if (method === 'installState') return progress
+      // The host only accepts the cancel request; the terminal frame still comes from the install flow.
+      if (method === 'cancelInstall') { cancelRequested = true; return { cancelled: true } }
+      if (method === 'installRecommended') {
+        const [id, options] = args
+        if (id !== recommendation.id) throw Error('未知推荐技能')
+        if (failNext) {
+          failNext = false
+          emit({ operationId: options.operationId, recommendationId: id, phase: 'failed', receivedBytes: 0, error: '下载失败：网络错误', updatedAt: Date.now() })
+          throw Error('下载失败：网络错误')
+        }
+        emit({ operationId: options.operationId, recommendationId: id, phase: 'downloading', receivedBytes: 0, totalBytes: recommendation.expectedBytes, updatedAt: Date.now() })
+        await new Promise(resolve => setTimeout(resolve, delay))
+        if (cancelRequested) { cancelRequested = false; emit({ operationId: options.operationId, recommendationId: id, phase: 'cancelled', receivedBytes: 0, updatedAt: Date.now() }); throw Object.assign(Error('推荐技能安装已取消'), { name: 'AbortError' }) }
+        emit({ operationId: options.operationId, recommendationId: id, phase: 'validating', receivedBytes: recommendation.expectedBytes, totalBytes: recommendation.expectedBytes, updatedAt: Date.now() })
+        await new Promise(resolve => setTimeout(resolve, delay))
+        if (cancelRequested) { cancelRequested = false; emit({ operationId: options.operationId, recommendationId: id, phase: 'cancelled', receivedBytes: recommendation.expectedBytes, updatedAt: Date.now() }); throw Object.assign(Error('推荐技能安装已取消'), { name: 'AbortError' }) }
+        emit({ operationId: options.operationId, recommendationId: id, phase: 'installing', receivedBytes: recommendation.expectedBytes, totalBytes: recommendation.expectedBytes, updatedAt: Date.now() })
+        await new Promise(resolve => setTimeout(resolve, delay))
+        installed = [installedRecommendation]
+        emit({ operationId: options.operationId, recommendationId: id, phase: 'installed', receivedBytes: recommendation.expectedBytes, totalBytes: recommendation.expectedBytes, updatedAt: Date.now() })
+        changed()
+        return installedRecommendation
+      }
+      if (method === 'qaSetInstalled') { installed = args[0]; changed(); return installed }
+      if (method === 'qaFailNext') { failNext = true; return true }
+      if (method === 'qaDelay') { delay = args[0]; return true }
+      if (method === 'qaSetRecommendations') { recommendationOverride = args[0]; return true }
+      if (method === 'qaFailRecommendations') { recommendationFails = args[0] === true; return true }
+      // Simulate an operation owned by another window.
+      if (method === 'qaEmitForeign') {
+        const [phase, operationId] = args
+        emit({ operationId, recommendationId: recommendation.id, phase, receivedBytes: 0, totalBytes: recommendation.expectedBytes, updatedAt: Date.now() })
+        return true
+      }
+      // Replay a frame with an older timestamp to prove the terminal state never regresses.
+      if (method === 'qaEmitStale') {
+        const [phase, operationId, updatedAt] = args
+        const stamped = { operationId, recommendationId: recommendation.id, phase, receivedBytes: 0, totalBytes: recommendation.expectedBytes, updatedAt }
+        progress = stamped
+        for (const listener of listeners) listener(stamped)
+        for (const win of BrowserWindow.getAllWindows()) if (!win.isDestroyed()) win.webContents.send('skills:install-progress', stamped)
+        return true
+      }
+      if (method === 'qaSubscribe') { listeners.add(args[0]); return true }
+      if (method === 'qaSubscribeChanged') { changedListeners.add(args[0]); return true }
+      throw Error('Unknown QA method ' + method)
+    })
+
+    fs.writeFileSync(path.join(output, 'preload.cjs'), `const{contextBridge,ipcRenderer}=require('electron');
+const invoke=(method,...args)=>ipcRenderer.invoke('skills-qa',method,args);
+contextBridge.exposeInMainWorld('ycode',{skills:{
+  list:(cwd)=>invoke('list',cwd),
+  recommendations:()=>invoke('recommendations'),
+  installRecommended:(id,options)=>invoke('installRecommended',id,options),
+  cancelInstall:(operationId)=>invoke('cancelInstall',operationId),
+  installState:()=>invoke('installState'),
+  onInstallProgress:(listener)=>{const wrapped=(_event,state)=>listener(state);ipcRenderer.on('skills:install-progress',wrapped);return()=>ipcRenderer.removeListener('skills:install-progress',wrapped)},
+  onChanged:(listener)=>{const wrapped=()=>listener();ipcRenderer.on('skills:changed',wrapped);return()=>ipcRenderer.removeListener('skills:changed',wrapped)},
+  read:async()=>({skill:{},content:'',files:[]}),
+  setEnabled:(...args)=>invoke('setEnabled',...args), remove:async()=>{}, export:async()=>null, importPath:async()=>null
+  ,qaSetInstalled:(v)=>invoke('qaSetInstalled',v),
+  qaFailNext:()=>invoke('qaFailNext'),
+  qaDelay:(v)=>invoke('qaDelay',v),
+  qaSetRecommendations:(v)=>invoke('qaSetRecommendations',v),
+  qaFailRecommendations:(v)=>invoke('qaFailRecommendations',v),
+  qaEmitForeign:(phase,operationId)=>invoke('qaEmitForeign',phase,operationId),
+  qaEmitStale:(phase,operationId,updatedAt)=>invoke('qaEmitStale',phase,operationId,updatedAt)
+},resources:{openExternal:async()=>undefined}});`)
+
+    const location = file => JSON.stringify(path.join(repository, file).replaceAll('\\', '/'))
+    fs.writeFileSync(path.join(output, 'fixture.tsx'), `import React from 'react';
+import{createRoot}from'react-dom/client';
+import Center from ${location('src/renderer/src/capabilities/CapabilityCenter')};
+import${location('src/renderer/src/styles/tokens.css')};
+import${location('src/renderer/src/styles/app.css')};
+window.__qa={uses:[],created:0,find:0};
+createRoot(document.getElementById('root')).render(
+  <div className="chat-pane cr-theme" style={{height:'100vh'}}>
+    <Center initialTab="skills" onBackToChat={()=>{}} onUseSkill={skill=>window.__qa.uses.push(skill)} onCreateSkill={()=>window.__qa.created++} onFindSkill={()=>window.__qa.find++}/>
+  </div>);`)
+    await require('esbuild').build({
+      entryPoints: [path.join(output, 'fixture.tsx')], bundle: true, platform: 'browser', format: 'esm', jsx: 'automatic',
+      outfile: path.join(output, 'fixture.js'), loader: { '.svg': 'file', '.png': 'file', '.jpg': 'file', '.woff': 'file', '.woff2': 'file', '.ttf': 'file' }, logLevel: 'warning'
+    })
+    fs.writeFileSync(path.join(output, 'index.html'), '<html data-theme="light"><head><meta charset="utf-8"><link rel="stylesheet" href="fixture.css"><style>html,body,#root{width:100%;height:100%;margin:0}</style></head><body><div id="root"></div><script type="module" src="fixture.js"></script></body></html>')
+
+    const win = new BrowserWindow({
+      width: 1052, height: 901, useContentSize: true, frame: false, show: false,
+      webPreferences: { preload: path.join(output, 'preload.cjs'), contextIsolation: true, nodeIntegration: false, backgroundThrottling: false }
+    })
+    win.webContents.on('console-message', (_event, level, message) => { if (level === 3) errors.push(message) })
+    const read = code => win.webContents.executeJavaScript(code)
+    const check = (label, actual, expected) => {
+      const pass = typeof expected === 'function' ? expected(actual) : JSON.stringify(actual) === JSON.stringify(expected)
+      assert.ok(pass, `${label}: ${JSON.stringify(actual)}`)
+      checks.push(label)
+    }
+    const pause = ms => new Promise(resolve => setTimeout(resolve, ms))
+    const wait = async code => { for (let index = 0; index < 200; index++) { if (await read(code)) return; await pause(50) } throw Error('Timeout ' + code) }
+    const click = async selector => {
+      await read(`(()=>{const e=document.querySelector(${JSON.stringify(selector)});if(!e)throw Error('Missing '+${JSON.stringify(selector)});e.click();return true})()`)
+      await pause(140)
+    }
+    const capture = async name => {
+      win.webContents.invalidate()
+      await pause(120)
+      // A hidden window can capture the previous frame; warm the compositor first.
+      await win.webContents.capturePage()
+      await pause(200)
+      const image = await win.webContents.capturePage()
+      fs.writeFileSync(path.join(output, name + '.png'), image.toPNG())
+      screenshots.push(name + '.png')
+    }
+
+    try {
+      await win.loadFile(path.join(output, 'index.html'))
+      await wait('!!document.querySelector(".yc-skills-page")')
+      await wait('!!document.querySelector("[data-recommendation-id=archify]")')
+
+      check('the recommendation card renders from the host catalog', await read('document.querySelector("[data-recommendation-id=archify] .sm-card-name")?.textContent'), 'Archify')
+      check('the card exposes its install state for the host test', await read('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState'), 'none')
+      check('the card shows the author supplied description', await read('document.querySelector("[data-recommendation-id=archify] .sm-card-desc")?.textContent'), recommendation.description)
+      check('no maintenance placeholder is shown', await read('!!document.querySelector("[data-capability-maintenance]")'), false)
+      check('the remote catalog tabs still report no connection', await read('!!document.querySelector(".yc-skill-market-unavailable")'), false)
+      await capture('recommendation-card')
+
+      // First install asks for an explicit confirmation.
+      await click('[aria-label="安装 Archify"]')
+      await wait('!!document.querySelector(".yc-skill-detail-shell")')
+      check('the confirm dialog names the source repository', await read('document.querySelector(".yc-skill-detail-shell").textContent.includes("tt-a1i/archify")'), true)
+      check('the confirm dialog states that no install script runs', await read('document.querySelector(".yc-skill-detail-shell").textContent.includes("不会执行仓库中的任何安装命令")'), true)
+      check('the confirm dialog warns that the skill contains scripts', await read('document.querySelector(".yc-skill-detail-shell").textContent.includes("包含脚本") || document.querySelector(".yc-skill-detail-shell").textContent.includes("脚本")'), true)
+      await capture('install-confirm')
+      await read('(()=>{const first=document.querySelector("[role=dialog] .sm-skill-detail-close");first.focus();first.dispatchEvent(new KeyboardEvent("keydown",{key:"Tab",shiftKey:true,bubbles:true,cancelable:true}))})()')
+      check('reverse Tab reaches the collapsible source information', await read('document.activeElement.tagName'), 'SUMMARY')
+      await read('document.activeElement.dispatchEvent(new KeyboardEvent("keydown",{key:"Tab",bubbles:true,cancelable:true}))')
+      check('Tab wraps inside the modal rather than entering the sidebar', await read('document.activeElement.getAttribute("aria-label")'), '关闭技能详情')
+      await read('window.__detailBeforeInstall=document.querySelector("[role=dialog]")')
+      await click('[aria-label="确认安装推荐技能"]')
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="installed"')
+      check('the install progress is reported by the host', await read('document.querySelector(".yc-skill-inline-install").dataset.installPhase'), 'installed')
+      check('the host received the recommendation id', await read(`JSON.stringify(${JSON.stringify(calls)}.filter(c=>c[0]==='installRecommended').map(c=>c[1]))`), '["archify"]')
+      check('the host received a fresh operation id', await read(`(${JSON.stringify(calls)}.filter(c=>c[0]==='installRecommended').every(c=>typeof c[2]?.operationId==='string'&&c[2].operationId.length>8))`), true)
+      check('a first install is not an overwrite', await read(`(${JSON.stringify(calls)}.filter(c=>c[0]==='installRecommended').every(c=>c[2]?.overwrite!==true))`), true)
+      await wait('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState==="current"')
+      check('the card reports the recommendation as installed', await read('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState'), 'current')
+      check('the installed skill is not offered for download again', await read('document.querySelector("[data-recommendation-id=archify] .sm-add-btn")?.disabled'), true)
+      check('the detail remains the same DOM instance throughout installation', await read('window.__detailBeforeInstall===document.querySelector("[role=dialog]")'), true)
+      check('the detail offers use after installation', await read('document.querySelector("[role=dialog] .sm-skill-detail-action-row")?.textContent.includes("去使用")'), true)
+      check('the success notification also offers use', await read('document.querySelector(".yc-skill-install-success")?.textContent.includes("去使用")'), true)
+      check('there is no permanent list footer progress panel', await read('!!document.querySelector(".yc-skills-scroll > .yc-skill-inline-install")'), false)
+      await capture('installed-detail')
+      await click('[role=dialog] .sm-skill-detail-close')
+
+      // The installed list stays reachable and the skill can be used.
+      await capture('installed-recommendation-list');
+      const installedState=await read('(()=>{const root=document.querySelector("[data-recommendation-id=archify]");const card=root.querySelector(".sm-card");const add=root.querySelector(".sm-add-btn");return {state:root.dataset.recommendationState,cardClasses:card.className,installedClass:card.classList.contains("sm-card--installed"),addButtonPresent:!!add,addButtonDisabled:add?.disabled,addSvgPresent:!!add?.querySelector("svg"),useSlotPresent:!!root.querySelector(".sm-use-btn"),footerPresent:!!document.querySelector(".yc-skill-recommendation-footer"),footerText:document.querySelector(".yc-skill-recommendation-footer")?.textContent}})()');
+      fs.writeFileSync(path.join(output,'installed-state.json'),JSON.stringify({codeSha:'51531dcae8d8ade85db9e203bc8c0f712805b2ae',installedState,errors,scope:'Actual recommended-skill component and CSS in Electron with controlled host; no network or actual skill installation'},null,2));
+      console.log(JSON.stringify({result:'REPRODUCED',output,installedState}));win.destroy();app.exit(0);return;
+      await click('.yc-skill-recommendation-footer button')
+      await wait('document.querySelectorAll(".sm-card").length===1')
+      check('the installed skill appears in the installed list', await read('document.querySelector(".sm-card-name")?.textContent'), 'Archify')
+      await click('[aria-label="返回专家中心"]')
+      await wait('!!document.querySelector("[data-recommendation-id=archify]")')
+
+      // A local skill with the same name requires an explicit overwrite.
+      await read(`window.ycode.skills.qaSetInstalled(${JSON.stringify([localSkill])})`)
+      await wait('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState==="conflict"')
+      await click('[aria-label="安装 Archify"]')
+      await wait('!!document.querySelector(".yc-skill-detail-shell")')
+      check('a same-name local skill requires an explicit replacement', await read('document.querySelector(".yc-skill-detail-shell").textContent.includes("替换")'), true)
+      check('the replacement notice mentions the local modification', await read('document.querySelector(".yc-skill-detail-shell").textContent.includes("本地内容已被修改")'), true)
+      await click('[aria-label="确认安装推荐技能"]')
+      await wait('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState==="current"')
+      check('an explicit replacement is sent to the host as an overwrite', await read(`(${JSON.stringify(calls)}.filter(c=>c[0]==='installRecommended').at(-1)[2]?.overwrite)===true`), true)
+      await click('[role=dialog] .sm-skill-detail-close')
+
+      // A failing download reports the real host error and allows a retry.
+      await read(`window.ycode.skills.qaSetInstalled(${JSON.stringify([])})`)
+      await wait('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState==="none"')
+      await read(`window.ycode.skills.qaFailNext()`)
+      await click('[aria-label="安装 Archify"]')
+      await click('[aria-label="确认安装推荐技能"]')
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="failed"')
+      check('a failed install shows the host error', await read('document.querySelector(".yc-skill-inline-install").textContent.includes("网络错误")'), true)
+      check('a failed install can be retried from the same card', await read('document.querySelector("[data-recommendation-id=archify] .sm-add-btn")?.disabled'), false)
+      await click('[role=dialog] .sm-skill-detail-close')
+
+      // Cancellation is allowed before the atomic commit phase.
+      await read(`window.ycode.skills.qaDelay(400)`)
+      await click('[aria-label="安装 Archify"]')
+      await click('[aria-label="确认安装推荐技能"]')
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="downloading"')
+      check('the download phase can be cancelled', await read('[...document.querySelectorAll("[role=dialog] button")].some(e=>e.textContent==="取消安装"&&!e.disabled)'), true)
+      await read('document.querySelector("[role=dialog]").querySelectorAll("button").forEach(e=>{if(e.textContent==="取消安装")e.click()})')
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="cancelled"')
+      check('the cancellation is sent to the host', await read(`${JSON.stringify(calls)}.some(c=>c[0]==='cancelInstall')`), true)
+      await click('[role=dialog] .sm-skill-detail-close')
+      await read(`window.ycode.skills.qaDelay(0)`)
+
+      // Closing the detail never aborts an accepted install; reopening resumes it.
+      await read('window.ycode.skills.qaDelay(250)')
+      await click('[aria-label="安装 Archify"]'); await click('[aria-label="确认安装推荐技能"]')
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="downloading"')
+      const continuingId = await read('document.querySelector(".yc-skill-inline-install").dataset.operationId')
+      await click('[role=dialog] .sm-skill-detail-close')
+      check('closing a running detail restores the background', await read('document.getElementById("root").inert'), false)
+      await click('[data-recommendation-id=archify] .sm-card')
+      check('reopening detail keeps the same install operation', await read('document.querySelector(".yc-skill-inline-install").dataset.operationId'), continuingId)
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="installing"')
+      check('the commit phase disables cancellation in place', await read('[...document.querySelectorAll("[role=dialog] button")].find(e=>e.textContent==="取消安装")?.disabled'), true)
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="installed"')
+      await click('[role=dialog] .sm-skill-detail-close')
+      await click('.yc-skill-install-success [aria-label="使用推荐技能 Archify"]')
+      check('the success notification invokes the same use callback', await read('window.__qa.uses.length'), 1)
+      await read(`window.ycode.skills.qaSetInstalled(${JSON.stringify([{ ...installedRecommendation, enabled: false }])})`)
+      await wait('document.querySelector(".yc-skill-recommendation-meta")?.textContent.includes("启用后使用")')
+      await click('.yc-skill-recommendation-meta [aria-label="使用推荐技能 Archify"]')
+      await wait('window.__qa.uses.length===2')
+      check('disabled recommendation is enabled before use', await read('window.__qa.uses.at(-1).enabled'), true)
+      await read('window.ycode.skills.qaDelay(0)'); await read('window.ycode.skills.qaSetInstalled([])')
+      await wait('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState==="none"')
+
+      // A failing catalog is reported as unavailable, not as a maintenance page.
+      // The page loads its catalog once, so the failure is proven on a fresh mount.
+      await read(`window.ycode.skills.qaFailRecommendations(true)`)
+      await read(`location.reload()`)
+      await wait('!!document.querySelector(".yc-skill-recommendation-unavailable")')
+      check('an empty catalog is reported as unavailable, not as a maintenance page', await read('!!document.querySelector("[data-capability-maintenance]")'), false)
+      check('the unavailable state still offers the installed list', await read('!!document.querySelector(".yc-skill-recommendation-unavailable button")'), true)
+      await read(`window.ycode.skills.qaFailRecommendations(false)`)
+      await read(`location.reload()`)
+      await wait('!!document.querySelector("[data-recommendation-id=archify]")')
+
+      // An install owned by another window blocks a new install here.
+      const foreignOperation = '11111111-2222-4333-8444-555555555555'
+      await read(`window.ycode.skills.qaEmitForeign('downloading', ${JSON.stringify(foreignOperation)})`)
+      await wait('!!document.querySelector("[data-foreign-install=true]")')
+      check('an install from another window is reported', await read('document.querySelector("[data-foreign-install=true]").textContent.includes("其他窗口正在安装推荐技能")'), true)
+      check('a new install is blocked while another window is installing', await read('document.querySelector("[data-recommendation-id=archify] .sm-add-btn")?.disabled'), true)
+      check('the blocked state is explained on the card', await read('!!document.querySelector(".yc-skill-recommendation-busy")'), true)
+      await capture('foreign-install')
+      await read(`window.ycode.skills.qaEmitForeign('installed', ${JSON.stringify(foreignOperation)})`)
+      await wait('!document.querySelector("[data-foreign-install=true]")')
+      check('the foreign block clears when that operation finishes', await read('document.querySelector("[data-recommendation-id=archify] .sm-add-btn")?.disabled'), false)
+
+      // A stale frame must not move a settled operation back into a running phase.
+      await read(`window.ycode.skills.qaSetInstalled(${JSON.stringify([])})`)
+      await wait('document.querySelector("[data-recommendation-id=archify]").dataset.recommendationState==="none"')
+      await read(`window.ycode.skills.qaDelay(0)`)
+      await click('[aria-label="安装 Archify"]')
+      await click('[aria-label="确认安装推荐技能"]')
+      await wait('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase==="installed"')
+      const settledOperation = await read(`(${JSON.stringify(calls)}.filter(c=>c[0]==='installRecommended').at(-1)[2]?.operationId)`)
+      check('the settled install recorded its operation id', typeof settledOperation === 'string' && settledOperation.length > 8, true)
+      await read(`window.ycode.skills.qaEmitStale('downloading', ${JSON.stringify(settledOperation)}, 1)`)
+      await pause(250)
+      check('a stale frame does not regress the settled install', await read('document.querySelector(".yc-skill-inline-install")?.dataset.installPhase'), 'installed')
+      await click('[role=dialog] .sm-skill-detail-close')
+
+      // Dark and narrow captures of the real page.
+      // This fixture mounts only the capability center, so the theme attribute is set directly.
+        // The dark token switch is proven here only; the production app harness covers the light flow.
+      await read(`(()=>{localStorage.setItem('ycode:theme','dark');document.documentElement.dataset.theme='dark';return true})()`)
+      await wait('document.documentElement.dataset.theme==="dark"')
+      await wait('!!document.querySelector(".yc-capability-center .expert-center-dark")')
+      check('the dark theme reaches the real page', await read('!!document.querySelector(".yc-capability-center .expert-center-dark")'), true)
+        // The card transitions its background, so the dark surface only settles after the animation.
+        await wait(`(()=>{const card=document.querySelector('[data-recommendation-id=archify] .sm-card');if(!card)return false;const m=/rgba?\\((\\d+)/.exec(getComputedStyle(card).backgroundColor);return !!m&&Number(m[1])<90})()`)
+        const darkColors = await read(`(()=>{const card=document.querySelector('[data-recommendation-id=archify] .sm-card');const page=document.querySelector('.yc-capability-center .expert-center-page');return{card:card?getComputedStyle(card).backgroundColor:null,page:page?getComputedStyle(page).backgroundColor:null}})()`)
+      check('the dark card uses a dark surface', darkColors.card, value => typeof value === 'string' && /rgba?\((\d+), (\d+), (\d+)/.test(value) && Number(value.match(/rgba?\((\d+)/)[1]) < 90)
+      const overflow = await read(`(()=>{const wide=[...document.querySelectorAll('*')].filter(e=>e.getBoundingClientRect().right>innerWidth+1).map(e=>e.className||e.tagName).slice(0,4);return{scrollWidth:document.documentElement.scrollWidth,innerWidth,wide}})()`)
+      check('the dark layout keeps the recommendation card inside the viewport', await read(`(()=>{const c=document.querySelector('[data-recommendation-id=archify] .sm-card');if(!c)return false;const r=c.getBoundingClientRect();return r.left>=0&&r.right<=innerWidth+1})()`), true)
+      check('the dark layout does not overflow the document', overflow.scrollWidth <= overflow.innerWidth + 1, true)
+      await capture('recommendation-dark')
+      win.setSize(720, 900)
+      await pause(400)
+      check('the recommendation card stays inside the narrow viewport', await read('(()=>{const c=document.querySelector("[data-recommendation-id=archify] .sm-card");if(!c)return false;const r=c.getBoundingClientRect();return r.left>=0&&r.right<=innerWidth+1})()'), true)
+      const narrowOverflow = await read(`(()=>{const wide=[...document.querySelectorAll('*')].filter(e=>e.getBoundingClientRect().right>innerWidth+1).map(e=>String(e.className||e.tagName)).slice(0,5);return{scrollWidth:document.documentElement.scrollWidth,innerWidth,wide}})()`)
+      check('the narrow recommendation card causes no document overflow', narrowOverflow.scrollWidth <= narrowOverflow.innerWidth + 1, true)
+      await capture('recommendation-narrow')
+      win.setSize(1052, 901)
+      await pause(250)
+
+      check('no renderer errors', errors, [])
+      fs.writeFileSync(path.join(output, 'report.json'), JSON.stringify({
+        result: 'PASS', checks, calls, screenshots,
+        limits: 'Controlled host in isolated Electron; the shipped page and styles are used. No network, no real skill storage, no real install.'
+      }, null, 2))
+      console.log(JSON.stringify({ result: 'PASS', checks: checks.length, output }))
+      win.destroy()
+      app.exit(0)
+    } catch (error) {
+      await capture('failure')
+      fs.writeFileSync(path.join(output, 'failure.json'), JSON.stringify({ error: String(error), stack: error?.stack, checks, errors, calls, html: await read('document.body.innerHTML') }, null, 2))
+      console.error(error)
+      win.destroy()
+      app.exit(1)
+    }
+  })().catch(error => { console.error(error); electron.app.exit(1) })
+}
diff --git a/docs/协作/开发与验收协作流程.md b/docs/协作/开发与验收协作流程.md
index d89edcc..1b8ad11 100644
--- a/docs/协作/开发与验收协作流程.md
+++ b/docs/协作/开发与验收协作流程.md
@@ -186,3 +186,5 @@ npm run build
 - [Windows复测与后续开发](../对话输入对齐复测与后续开发-2026-10-21.md)：针对 `37ddb2c` 的 A01～A09，包含已证缺陷、样式偏差与真实 SDK 验收缺口；该结果不自动适用于后续代码。
 
 首批正式需求已整理为 [B01：对话与输入交互复测问题修复](B01-需求.md)，覆盖 A01～A09，分为 YC-001～YC-004，并列明逐项 AC、测试及证据要求。状态为“待开发”，不代表已经接单、交付或验收通过。本批需求推送成功后推送窗口转交开发端；开发端创建 `B01-交付-01.md` 接单、实现并交付。
+
+2026-10-21 新增技能页需求见 [B02：推荐技能的已安装样式与重复入口](B02-需求.md)，包含 YC-005／006。它与 B01 分开交付：推荐中已安装卡不再保留添加 Plus，移除列表底部“查看已安装技能”，保留顶部导航，并核对既有 WorkBuddy REA 恢复记录及当前证据限制。