diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 967b116..0c34018 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,13 +16,20 @@ concurrency:
 jobs:
   actionlint:
     name: Workflow lint (actionlint + YAML)
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
-      - name: Install actionlint
+      - name: Install actionlint v1.7.12
+        env:
+          ACTIONLINT_VERSION: 1.7.12
         run: |
-          bash <(curl -sSL https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
-          sudo mv actionlint /usr/local/bin/
+          curl --fail --location --silent --show-error \
+            "https://github.com/rhysd/actionlint/releases/download/v${ACTIONLINT_VERSION}/actionlint_${ACTIONLINT_VERSION}_linux_amd64.tar.gz" \
+            --output actionlint.tar.gz
+          echo "8aca8db96f1b94770f1b0d72b6dddcb1ebb8123cb3712530b08cc387b349a3d8  actionlint.tar.gz" \
+            | sha256sum --check --strict -
+          tar -xzf actionlint.tar.gz actionlint
+          sudo install -m 0755 actionlint /usr/local/bin/actionlint
       - name: Lint all workflow files
         run: actionlint -color .github/workflows/*.yml
       - name: Validate YAML parses
diff --git a/.github/workflows/python-quality-baseline.yml b/.github/workflows/python-quality-baseline.yml
index 8f38d55..2ba7e65 100644
--- a/.github/workflows/python-quality-baseline.yml
+++ b/.github/workflows/python-quality-baseline.yml
@@ -13,7 +13,7 @@
 #
 #   jobs:
 #     quality-baseline:
-#       uses: ReSerendipity/.github/.github/workflows/python-quality-baseline.yml@main
+#       uses: ReSerendipity/.github/.github/workflows/python-quality-baseline.yml@<reviewed-commit-sha>
 #       with:
 #         package: app/integrated_app
 #         coverage_min: 65
@@ -23,6 +23,8 @@
 #       permissions:
 #         contents: read
 #
+#   可复用工作流调用方应锁定已审阅的提交 SHA，不使用会漂移的 @main。
+#
 # ⚠️ 维护约定（证据绑定）：
 #   - 修改本文件等于同时修改四个仓库的门禁行为，合并前须在至少一个
 #     试点仓跑绿；
@@ -114,10 +116,10 @@ jobs:
     timeout-minutes: 30
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
 
       - name: Set up Python ${{ inputs.python_version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: ${{ inputs.python_version }}
           cache: 'pip'
@@ -155,10 +157,10 @@ jobs:
     timeout-minutes: 15
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
 
       - name: Set up Python ${{ inputs.python_version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: ${{ inputs.python_version }}
           cache: 'pip'
@@ -173,9 +175,18 @@ jobs:
 
       - name: Run mypy and enforce ratchet
         run: |
-          mypy ${{ inputs.mypy_target }} --ignore-missing-imports --no-error-summary > mypy.log 2>&1 || true
+          if mypy ${{ inputs.mypy_target }} --ignore-missing-imports --no-error-summary > mypy.log 2>&1; then
+            MYPY_STATUS=0
+          else
+            MYPY_STATUS=$?
+          fi
           COUNT=$(grep -c 'error:' mypy.log || true)
           COUNT=${COUNT:-0}
+          if [ "$MYPY_STATUS" -gt 1 ] || { [ "$MYPY_STATUS" -eq 1 ] && [ "$COUNT" -eq 0 ]; }; then
+            echo "::error::mypy 执行失败 (exit $MYPY_STATUS)，拒绝将工具/运行时失败误计为零错误"
+            head -n 60 mypy.log
+            exit 1
+          fi
           if [ -f '${{ inputs.mypy_baseline_file }}' ]; then
             BASELINE=$(tr -d '[:space:]' < '${{ inputs.mypy_baseline_file }}')
           else
diff --git a/.github/workflows/self-purify.yml b/.github/workflows/self-purify.yml
index 76f0193..6d6ead9 100644
--- a/.github/workflows/self-purify.yml
+++ b/.github/workflows/self-purify.yml
@@ -9,25 +9,52 @@ name: Family Self-Purify Check
 #   ③ README 未引用 org 级仓库（组织级健康文档链接缺失）
 # 说明：AGENTS.md 为本地独享文件（gitignored），CI 拉取的检出中不存在，
 #       故其行数上限无法在此检查，由 AI 会话自检 + 本地钩子约束。
+# 默认保留家族非阻塞语义。调用方审计并准备好阻断本地治理文档后，可传
+# enforce_critical_checks: true；只有该核心规则会进入独立阻断 job。
 
 on:
   workflow_call:
+    inputs:
+      enforce_critical_checks:
+        description: 是否将本地治理文档不得被跟踪设为阻断门禁（默认关闭以兼容现有仓库）
+        required: false
+        type: boolean
+        default: false
 
 permissions:
   contents: read
 
 jobs:
+  critical-governance:
+    if: inputs.enforce_critical_checks
+    name: 自净化核心规则（阻断）
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
+
+      - name: 本地治理文档不得被 git 跟踪
+        run: |
+          HITS=$(git ls-files | grep -E '^(docs/(plans|project|_devarchive|agents|execution)/|LOCAL_RULES\.md$|FIX_LOG\.md$)' \
+            | grep -vE '^(docs/reports/(落地执行总结|执行对照表)-桌面分发与安全加固-20260910\.md|docs/execution/(RELEASE_VERIFICATION\.md|(执行对照表|落地执行总结)-桌面分发与安全加固-20260910\.md|依赖与安全跟踪机制-20260911\.md)|docs/project/(KNOWN_GOTCHAS\.md|AI_DEV_SOPS\.md))$' || true)
+          if [ -n "$HITS" ]; then
+            echo "::error::以下本地治理文档被 git 跟踪（应 git rm --cached 且由 .gitignore 覆盖）："
+            echo "$HITS"
+            exit 1
+          fi
+          echo "OK：无本地治理文档被跟踪"
+
   self-purify:
     name: 自净化检查
-    # 家族绿线约定：非阻塞在此实现（调用方 uses job 不允许 continue-on-error）。
-    # 任一检查失败会红该 step 并输出 ::error 注解，但 job/run 结论仍为 success。
+    # 保留现有家族兼容语义：其余健康检查继续告警但不阻断调用仓库。
     continue-on-error: true
     runs-on: ubuntu-24.04
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
 
       - name: ① 本地治理文档不得被 git 跟踪
+        if: ${{ !inputs.enforce_critical_checks }}
         run: |
           HITS=$(git ls-files | grep -E '^(docs/(plans|project|_devarchive|agents|execution)/|LOCAL_RULES\.md$|FIX_LOG\.md$)' \
             | grep -vE '^(docs/reports/(落地执行总结|执行对照表)-桌面分发与安全加固-20260910\.md|docs/execution/(RELEASE_VERIFICATION\.md|(执行对照表|落地执行总结)-桌面分发与安全加固-20260910\.md|依赖与安全跟踪机制-20260911\.md)|docs/project/(KNOWN_GOTCHAS\.md|AI_DEV_SOPS\.md))$' || true)
diff --git a/README.md b/README.md
index b750b3a..636a63b 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,10 @@
 
 治理约定细节见 `REPOSITORY_GUIDELINES.md`（命名/分支/密钥备份规范）、`CONTRIBUTING.md`、`CODE_OF_CONDUCT.md`、`SECURITY.md`、`SUPPORT.md`。
 
+## 复用工作流
+
+`.github/workflows/` 中的家族复用工作流由各仓通过 `workflow_call` 接入。调用方应引用已审阅的提交 SHA，而不是会漂移的 `@main`。`self-purify.yml` 默认维持非阻断兼容模式；调用仓完成规则核查后，可设置 `enforce_critical_checks: true`，将“本地治理文档不得被 git 跟踪”作为独立阻断门禁，其余健康检查仍保持告警性质。
+
 ## 维护原则
 
 - 默认文件保持通用，不写入某个项目独有的运行步骤或模型说明。