diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 7edfe571..c72f0037 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -20,9 +20,17 @@
 #   `pwsh` = PowerShell 7，**不是 Windows 自带**；本机 runner 只有
 #   Windows PowerShell 5.1（`C:\Windows\System32\WindowsPowerShell\v1.0\`），
 #   用 `shell: pwsh` 会直接报 `Cannot find: pwsh in PATH` → job 失败（跑不到任何业务逻辑）。
-#   `shell: powershell` 在任意 Windows 上都存在，且本 workflow 的脚本
-#   **刻意只用 PS 5.1 兼容语法**（无 `??`/`?:`/`&&`/`||`/`-Parallel`）。
-#   ⚠️ 若将来要改回 `pwsh`，须先在所有 runner 上装 PowerShell 7。
+#   `shell: powershell` 在任意 Windows 上都存在。
+#
+# 🔴🔴 `run:` 脚本内容必须【纯 ASCII】（2026-10-02 第二次实测修正）：
+#   runner 把每个 `run:` 块写入临时 `.ps1`（`...\act\workflow\N.ps1`）再交给
+#   Windows PowerShell 5.1 执行，而该临时文件**无 BOM** → PS 5.1 按 **GBK/CP936** 解码。
+#   脚本里的 UTF-8 中文字节会与相邻引号错位 → 报
+#     `TerminatorExpectedAtEndOfString` / `字符串缺少终止符: "` / `缺少右"}"`
+#   （报错行号正是含中文的那一行，极易误判为逻辑错误）。
+#   **故本文件所有 `run:` 块内零非 ASCII**（中文仅出现在 YAML 的 name:/注释里——
+#   那些由 Gitea 按 UTF-8 读，不喂给 PowerShell，安全）。
+#   ⚠️ 与 AGENTS.md「字符串字面量必须纯 ASCII」同源；改脚本时务必守住。
 #
 # ⚠️ 前置（部署到 Gitea 时需确认）：
 #   - 该 Gitea 实例已启用 Actions：`[actions] ENABLED = true`（site admin 配置）
@@ -81,19 +89,19 @@ jobs:
             }
           }
           if ($missing.Count -gt 0) {
-            Write-Host "::error::runner 缺少：$($missing -join ', ') —— 请安装后重跑"
+            Write-Host "::error::runner missing: $($missing -join ', ') -- install then re-run"
             exit 1
           }
           python --version
           cppcheck --version
 
-          # pre-commit：优先用 `python -m pre_commit`（不依赖 PATH 里的 console script）
+          # pre-commit: use `python -m pre_commit` (does not rely on PATH console script)
           python -m pre_commit --version
           if ($LASTEXITCODE -ne 0) {
-            Write-Host "::error::runner 缺少 pre-commit（pip install pre-commit / uv tool install pre-commit）"
+            Write-Host "::error::runner missing pre-commit (pip install pre-commit)"
             exit 1
           }
-          Write-Host "runner 环境自检通过"
+          Write-Host "runner environment check passed"
 
       - name: 安装 pre-commit 钩子到本仓库
         shell: powershell
@@ -103,14 +111,14 @@ jobs:
         id: skip
         shell: powershell
         run: |
-          # mem-numbers 的事实源是 Keil 构建产物 .map（已 gitignore）。
-          # 无 .map => 本 runner 不可能跑 L0 的该钩子 => 跳过（不是"通过"，是"不适用"）。
+          # mem-numbers fact source is the Keil build artifact .map (gitignored).
+          # No .map => this hook cannot run => skip (not "pass", but "not applicable").
           $map = Get-ChildItem -Path 'MDK-ARM' -Recurse -Filter '*.map' -ErrorAction SilentlyContinue
           if ($map) {
-            Write-Host "找到 .map：$($map[0].FullName) —— mem-numbers 照常运行"
+            Write-Host "found .map: $($map[0].FullName) -- mem-numbers runs normally"
             "value=" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
           } else {
-            Write-Host "::notice::未找到 .map（未做 Keil 构建）—— 跳过 mem-numbers 钩子"
+            Write-Host "::notice::no .map found (no Keil build) -- skipping mem-numbers hook"
             "value=mem-numbers" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
           }
 
@@ -122,7 +130,7 @@ jobs:
           if ($env:SKIP) { Write-Host "SKIP=$env:SKIP" }
           python -m pre_commit run --all-files --show-diff-on-failure
           if ($LASTEXITCODE -ne 0) {
-            Write-Host "::error::L0 静态门禁未通过（详见上方输出）"
+            Write-Host "::error::L0 static gates failed (see output above)"
             exit $LASTEXITCODE
           }
 
@@ -139,7 +147,7 @@ jobs:
         id: msvc
         shell: powershell
         run: |
-          # 与 test/host/common/unit_test_harness.py 的 VS_ROOTS 保持一致
+          # Keep in sync with VS_ROOTS in test/host/common/unit_test_harness.py
           $roots = @(
             'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools',
             'C:\Program Files\Microsoft Visual Studio\2022\BuildTools',
@@ -151,13 +159,13 @@ jobs:
             if (Test-Path $r) {
               $cl = Get-ChildItem -Path $r -Recurse -Filter 'cl.exe' -ErrorAction SilentlyContinue |
                     Where-Object { $_.FullName -like '*Hostx64\x64*' } | Select-Object -First 1
-              if ($cl) { $found = $true; Write-Host "找到 cl.exe: $($cl.FullName)"; break }
+              if ($cl) { $found = $true; Write-Host "found cl.exe: $($cl.FullName)"; break }
             }
           }
           if ($found) {
             "value=yes" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
           } else {
-            Write-Host "::warning::runner 未安装 MSVC（VS C++ 工具链）—— 跳过 L0.5 单测。请安装 VS BuildTools 后重跑。"
+            Write-Host "::warning::runner has no MSVC (VS C++ toolchain) -- skipping L0.5. Install VS BuildTools and re-run."
             "value=no" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
           }
 
@@ -165,21 +173,21 @@ jobs:
         if: steps.msvc.outputs.value == 'yes'
         shell: powershell
         run: |
-          # 遍历 test/host/*/run_unit_test.py（各模块自带运行器，统一走 common harness）
+          # Iterate test/host/*/run_unit_test.py (each module ships its own runner via common harness)
           $runners = Get-ChildItem -Path 'test/host' -Recurse -Filter 'run_unit_test.py' |
                      Sort-Object FullName
           if (-not $runners) {
-            Write-Host "::warning::未找到 test/host/**/run_unit_test.py —— 跳过"
+            Write-Host "::warning::no test/host/**/run_unit_test.py found -- skipping"
             exit 0
           }
           $fail = 0
           foreach ($r in $runners) {
             Write-Host "================================"
-            Write-Host "运行：$($r.FullName)"
+            Write-Host "run: $($r.FullName)"
             Write-Host "================================"
             python $r.FullName
             if ($LASTEXITCODE -ne 0) {
-              Write-Host "::error::单测失败：$($r.FullName)（退出码 $LASTEXITCODE）"
+              Write-Host "::error::unit test failed: $($r.FullName) (exit $LASTEXITCODE)"
               $fail = 1
             }
           }
@@ -189,6 +197,6 @@ jobs:
         if: steps.msvc.outputs.value == 'no'
         shell: powershell
         run: |
-          Write-Host "L0.5 未执行：runner 缺 MSVC。"
-          Write-Host "本地等价命令：& '.venv\Scripts\python.exe' scripts/ci_local.py"
+          Write-Host "L0.5 skipped: runner has no MSVC."
+          Write-Host "Local equivalent: & '.venv\Scripts\python.exe' scripts/ci_local.py"
           exit 0