diff --git a/.github/workflows/build-release.yml b/.github/workflows/build-release.yml
index 6d28680..edab967 100644
--- a/.github/workflows/build-release.yml
+++ b/.github/workflows/build-release.yml
@@ -153,6 +153,26 @@ jobs:
         shell: bash
         run: bash packaging/build-runtime.sh
 
+      # ── CRLF 断言（rant 2026-08-13T09:44:32）────────────────
+      # git blob 的 *.cmd 是 LF，工作区 CRLF 靠 .gitattributes checkout 转换；
+      # 若 CI 检出未应用 .gitattributes，build-runtime 拷到的就是 LF →
+      # cmd.exe 整文件串行拼接 → 安装器 "stop-emrg.cmd exit code 1"。
+      # build-runtime.sh 已强制转 CRLF（R126），此步双保险验证产物确实是纯 CRLF。
+      - name: Verify runtime *.cmd are pure CRLF
+        shell: bash
+        run: |
+          set -euo pipefail
+          for f in dist/runtime/bin/emrg.cmd dist/runtime/bin/emrgd.cmd dist/runtime/bin/stop-emrg.cmd; do
+            [ -f "$f" ] || continue
+            cr=$(tr -cd '\r' < "$f" | wc -c)
+            lf=$(tr -cd '\n' < "$f" | wc -c)
+            if [ "$cr" -ne "$lf" ] || [ "$lf" -eq 0 ]; then
+              echo "::error::$f has bare-LF line(s) ($((lf-cr)) of $lf) — cmd.exe misparses LF → installer exit 1"
+              exit 1
+            fi
+            echo "OK $f: pure CRLF ($lf lines)"
+          done
+
       # ── 图标资产生成（rant 2026-08-11T18:28:09：仓库只保留 icon.svg 设计源，
       #     png/icns/ico 由 CI 构建时现生成，必须先于 GUI 构建执行）──
       - name: Generate icon assets (icon.svg → png/icns/ico)
diff --git a/Agent.md b/Agent.md
index 645cd20..daf0a0b 100644
--- a/Agent.md
+++ b/Agent.md
@@ -118,7 +118,7 @@ Community needs voiced in HN agent-UI discussions map directly to EMRG's design:
 pkill -f "emrg.server"; rm -f ~/.emrg/emrgd.port; python -m emrg
 ```
 
-Python: `uv run pytest tests/ -v` (758) — import check: `uv run python -c "from emrg.client.app import run_client"`
+Python: `uv run pytest tests/ -v` (760) — import check: `uv run python -c "from emrg.client.app import run_client"`
 GUI: `cd emrg/gui && npm test` (229: 44 daemon_client + 19 conn-manager + 22 app-commands + 107 renderer smoke + 15 i18n + 7 integration + 3 commands + 5 build-config + 7 gui-state) — syntax: `node --check main.js preload.js daemon_client.js renderer/js/*.js`
 CI: `uv run pytest` (ubuntu + **windows-2025 matrix** — Windows pytest 回归在 PR CI 即失败，v0.2.29 教训 #725) + GUI tests + **actionlint workflow lint** (`rhysd/actionlint@v1.7.12` gate, #444 — workflow 解析错误在 PR CI 即失败，如 `if:` secrets 上下文)
 Re-trigger: `scripts/re-trigger-ci.sh [branch]` (workflow_dispatch, #527 — 替代空 commit 重触发：Actions outage 会整段丢弃 push 事件，dispatch 走 API 路径不受影响)
diff --git a/packaging/build-runtime.sh b/packaging/build-runtime.sh
index 32bed99..9e1a43a 100755
--- a/packaging/build-runtime.sh
+++ b/packaging/build-runtime.sh
@@ -71,6 +71,21 @@ cp -R "$PY_ROOT/." "$DIST/bin/python-dist/"
   cp "$ROOT/bin/stop-emrg.cmd" stop-emrg.cmd 2>/dev/null || true
   cp "$ROOT/bin/emrg-uninstall" emrg-uninstall
   chmod +x emrg emrgd emrg-uninstall
+  # R126: rant 2026-08-13T09:44:32 — 打包强制 CRLF，不依赖 .gitattributes 在 CI
+  # 检出是否生效（git blob 是 LF；工作区 CRLF 靠 checkout 转换，CI 打包若拿到
+  # LF → cmd.exe 整文件串行拼接 → 安装器 "stop-emrg.cmd exit code 1"）。
+  # 拷贝后统一为纯 CRLF（幂等：先归 LF 再转 CRLF），并断言纯 CRLF 才继续。
+  for f in emrg.cmd emrgd.cmd stop-emrg.cmd; do
+    [ -f "$f" ] || continue
+    python3 - "$f" <<'PY'
+import sys
+p = sys.argv[1]
+b = open(p, 'rb').read()
+b = b.replace(b'\r\n', b'\n').replace(b'\n', b'\r\n')
+assert b.count(b'\r\n') == b.count(b'\n') and b.count(b'\n') > 0, f'{p} CRLF normalization failed'
+open(p, 'wb').write(b)
+PY
+  done
 )
 
 # ── 3. source/（只读，排除 gui node_modules R14；⚠️ 只含 emrg/ 源码，不含 bin/ ——
diff --git a/tests/test_installer_stop.py b/tests/test_installer_stop.py
index e6ec0de..e1e1efa 100644
--- a/tests/test_installer_stop.py
+++ b/tests/test_installer_stop.py
@@ -133,3 +133,23 @@ def test_build_runtime_copies_stop_scripts():
     content = (REPO_ROOT / "packaging" / "build-runtime.sh").read_text(encoding="utf-8")
     assert 'cp "$ROOT/bin/stop-emrg.cmd" stop-emrg.cmd' in content
     assert 'cp "$ROOT/bin/stop-git.ps1"' not in content
+
+
+def test_build_runtime_forces_crlf():
+    """R126 / rant 2026-08-13T09:44:32 — build-runtime.sh must force pure CRLF
+    on the packaged *.cmd files (git blob is LF; .gitattributes checkout
+    conversion may not apply in CI → LF .cmd misparsed by cmd.exe → installer
+    "exit code 1")."""
+    content = (REPO_ROOT / "packaging" / "build-runtime.sh").read_text(encoding="utf-8")
+    # Normalization loop covers all three Windows launchers
+    assert "for f in emrg.cmd emrgd.cmd stop-emrg.cmd" in content
+    # Pure-CRLF assertion gates the build (LF-only → build fails)
+    assert "b.count(b'\\r\\n') == b.count(b'\\n')" in content
+
+
+def test_build_release_workflow_verifies_crlf():
+    """R126 companion — build-release.yml must assert packaged *.cmd are pure
+    CRLF after the Build runtime step (CI red on LF)."""
+    wf = (REPO_ROOT / ".github" / "workflows" / "build-release.yml").read_text(encoding="utf-8")
+    assert "Verify runtime *.cmd are pure CRLF" in wf
+    assert "bare-LF" in wf