diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4f912e..370012e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added (新增特性)
 
 - **CLI 查询**：新增 `--version`/`-v` 与 `--help`/`-h`，无需等待 stdin。
+- **分发 LICENSE**：本地复制与远端下载清单均包含仓库 `LICENSE`，修复分发物缺失 MIT 许可文本的问题。
+- **远端清单漂移测试**：新增单测断言 `RUNTIME_FILES` 覆盖 `runtime/` 下全部 `.js/.json` 与相对 `require()` 依赖，并反向断言清单每一项在仓库中真实存在，防止重蹈 v0.3.9 漏 `update-checker.js` 的事故。
+- **doctor 残留副本检查**：`--doctor` 新增 `codebuddy` 检查项，列出卸载时保留的 `.bak.codebuddy-hud.retained-*` 原文副本并提示手动清理（只列出、不自动删除）。
 
 ### Changed (变更)
 
@@ -32,6 +35,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **Windows PATH**：安装/卸载保留 HKCU `Path` 的 `%VAR%` 与注册表值类型；卸载按归一化路径移除 runtime bin，避免误删或漏删。
 - **effort 状态**：临时文件 + rename 原子写入，避免并发读到半截 JSON。
 - **bootstrap 查询源**：兼容 `CODEBUDDY_HUD_REMOTE_PKG_URL` 旧名；显式 Release URL 跳过默认 302/API 查询，两变量同设时新名优先。
+- **安装/卸载 JSONC 无损**：`--setup`/`--uninstall` 改为局部文本编辑，仅改动 `statusLine` 成员，保留注释、BOM、换行与格式；已有 `padding` 与额外字段予以保留；卸载在确认 `statusLine` 之外无改动时整文精确还原，否则仅回写该字段并把原文另存 `.retained-<time>-<pid>` 后再退役备份。
+- **技能目录归属保护**：部署与卸载只处理指向本次源目录的链接或带 `.codebuddy-hud-managed` 标记的复制目录；未知同名目录/链接/文件一律警告并保留，不再误删用户文件。
+- **主题配置保护**：`--theme` 对无效配置（非法 JSON、非对象根节点、不可读文件）直接报错并保留原文件，不再重置为空对象；写入复用原子写与权限保留，错误信息点出文件路径与严格 JSON 要求。`--setup --theme` 遇到换肤失败时中止，不继续写入 `statusLine`。
+- **扫描预算上限**：`display.toolActivityTailBytes` 增加 `MAX_TOTAL_BYTES` 上限钳制，各逆向扫描按剩余字节预算限制单次读取；配置文件超过 256 KiB 或非普通文件时跳过该层，防止仓库内恶意配置触发大内存读取。
 
 ### Performance & Hardening (性能与稳健性加固)
 
@@ -44,6 +51,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Tests (测试)
 
 - 新增 CLI 参数组合（64 种）、TTY 主题帮助、transcript 增长/截断与 stat 失败、Release 查询源优先级等回归。全量验证命令见 [AGENTS.md](AGENTS.md#测试与验证)，用例数以实际输出为准。
+- 新增远端清单漂移（正/反向）、JSONC 字节级往返、技能归属、主题失败保护、doctor 残留副本回归；`verify-install` 扩展用户技能保护与主题失败场景校验。
 
 ---
 
diff --git a/README.md b/README.md
index 120bb27..50e1895 100644
--- a/README.md
+++ b/README.md
@@ -147,7 +147,7 @@ codebuddy-hud --uninstall
 
 用户主题配置（`codebuddy-hud.config.json`）与 `~/.codebuddy/codebuddy-hud-runtime/` 运行时目录会被保留（可手动删除）；除 `statusLine` 外不会改动 `settings.json` 的其他配置项。
 
-安装与卸载保留 `settings.json` 未涉及的注释、BOM 和格式。卸载后若文件与安装前备份不同，原文另存为旁边的 `.bak.codebuddy-hud.retained-<time>-<pid>`，路径会在卸载输出中显示。
+安装与卸载保留 `settings.json` 未涉及的注释、BOM 和格式。卸载后若文件与安装前备份不同，原文另存为旁边的 `.bak.codebuddy-hud.retained-<time>-<pid>`，路径会在卸载输出中显示；也可用 `codebuddy-hud --doctor` 查看残留副本（只列出、不自动删除）。
 
 ---
 
diff --git a/README_en.md b/README_en.md
index 810cd73..a1af2ea 100644
--- a/README_en.md
+++ b/README_en.md
@@ -147,7 +147,7 @@ The uninstaller:
 
 Your theme config (`codebuddy-hud.config.json`) and the installed runtime directory (`~/.codebuddy/codebuddy-hud-runtime/`) are preserved — delete them manually if desired. Nothing else in `settings.json` is touched.
 
-Setup and uninstall preserve untouched comments, BOM and formatting in `settings.json`. If the restored file differs from the original backup, uninstall retains the original beside it as `.bak.codebuddy-hud.retained-<time>-<pid>` and prints its path.
+Setup and uninstall preserve untouched comments, BOM and formatting in `settings.json`. If the restored file differs from the original backup, uninstall retains the original beside it as `.bak.codebuddy-hud.retained-<time>-<pid>` and prints its path. Run `codebuddy-hud --doctor` to list retained copies (listed only, never auto-deleted).
 
 ---
 
diff --git a/docs/module-reference.md b/docs/module-reference.md
index 561dd49..0ff9b81 100644
--- a/docs/module-reference.md
+++ b/docs/module-reference.md
@@ -608,6 +608,7 @@ export function printDoctorReport(report: DoctorReport, isJson?: boolean, option
 5. `terminal / windowsPathNormalization`: Windows 路径大小写规范化检查。
 6. `git`: Git PATH 可达性、当前仓库分支与探测延迟。
 7. `transcript`: 遥测状态目录创建与可写性校验，并回显错误日志路径。
+8. `codebuddy / retainedBackups`: 扫描 settings 同目录下的 `.bak.codebuddy-hud.retained-*` 原文副本并列出（最多 5 个），提示手动清理；只读不删，无残留时为 `ok`。
 
 命令路径在 POSIX 下按原样与 shell 反转义两种形式校验；Windows 只按字面路径校验，保留 UNC 与 `\$`，避免把不存在的路径反转义成另一个有效文件。引号内尾反斜杠造成分词歧义时回退非转义分词。
 
@@ -629,7 +630,7 @@ export const THEMES: Array<{ name: string; label: string }>;
 
 界面文案（列表标题、用法提示、选择器标题/快捷键提示、预览框标题）通过 `lang.js` 字典输出，`config.language` 生效；预览框顶边按显示宽度（CJK 双列）计算，与底边对齐。
 
-`saveUserTheme()` 与配置加载保持严格 JSON 口径；仅文件不存在时新建。读取/解析失败或根节点不是对象时中止，原文件不变；成功写入复用 `atomicWriteSettingsFile()`，保留既有权限和软链接，新文件默认 `0600`。
+`saveUserTheme()` 与配置加载保持严格 JSON 口径；仅文件不存在时新建。读取/解析失败或根节点不是对象时中止，原文件不变，错误信息点出配置文件路径与严格 JSON 要求；成功写入复用 `atomicWriteSettingsFile()`，保留既有权限和软链接，新文件默认 `0600`。
 
 ---
 
diff --git a/runtime/doctor.js b/runtime/doctor.js
index 29e5b87..fb35802 100644
--- a/runtime/doctor.js
+++ b/runtime/doctor.js
@@ -260,6 +260,41 @@ function checkPathNormalization(i18n, cwd) {
   }];
 }
 
+// Uninstall retires the active `.bak.codebuddy-hud` snapshot but keeps a
+// `.retained-<time>-<pid>` copy of the original text when it differs from the
+// restored settings. Those copies accumulate by design (never auto-deleted),
+// so doctor surfaces them for a manual review-and-delete decision.
+function checkRetainedBackups(i18n) {
+  const settingsPath = getSettingsPath();
+  const dir = path.dirname(settingsPath);
+  const prefix = `${path.basename(settingsPath)}.bak.codebuddy-hud.retained-`;
+  let retained = [];
+  try {
+    retained = fs.readdirSync(dir).filter(name => name.startsWith(prefix));
+  } catch {
+    retained = [];
+  }
+  retained.sort();
+  if (retained.length === 0) {
+    return [{
+      category: 'codebuddy',
+      name: i18n.t('retainedBackups'),
+      status: 'ok',
+      detail: `No retained copies in ${dir}`,
+      message: null,
+    }];
+  }
+  const shown = retained.slice(0, 5).map(name => sanitizeTerminalText(name, 120));
+  const extra = retained.length - shown.length;
+  return [{
+    category: 'codebuddy',
+    name: i18n.t('retainedBackups'),
+    status: 'warn',
+    detail: extra > 0 ? `${shown.join(', ')} (and ${extra} more in ${dir})` : `${shown.join(', ')} (in ${dir})`,
+    message: i18n.t('doctorRetainedBackups'),
+  }];
+}
+
 function checkHostRefreshProtocol(i18n) {
   return [{
     category: 'codebuddy',
@@ -279,6 +314,7 @@ function runDoctor(options) {
   const checks = [
     checkNodeEnvironment(i18n),
     ...checkCodeBuddyConfig(i18n),
+    ...checkRetainedBackups(i18n),
     ...checkHostRefreshProtocol(i18n),
     ...checkEncodingEnvironment(i18n, config),
     ...checkPathNormalization(i18n, cwd),
diff --git a/runtime/lang.js b/runtime/lang.js
index 9cc8575..8cc92a9 100644
--- a/runtime/lang.js
+++ b/runtime/lang.js
@@ -30,6 +30,7 @@ const DICTIONARY = {
     unicodeSupport: 'Unicode 渲染支持',
     gitEnvironment: 'Git 环境与当前仓库',
     transcriptAccess: 'Transcript 日志目录访问',
+    retainedBackups: '卸载残留的配置恢复副本',
     hostRefreshProtocol: '宿主刷新架构契约',
     doctorNodeOld: 'Node.js 版本过旧，需要 >= 18.0.0',
     doctorSettingsMissing: '未找到 settings.json，请先运行 codebuddy-hud --setup',
@@ -38,6 +39,7 @@ const DICTIONARY = {
     doctorCodepageWarn: '建议运行 "chcp 65001" 启用 UTF-8 支持以获得最佳渲染效果',
     doctorGitBranchSlow: 'Git 分支查询耗时偏高',
     doctorTranscriptMissing: '未检测到 transcript 日志目录或暂无写入',
+    doctorRetainedBackups: '卸载时保留了 settings 原文副本，确认无误后可手动删除',
 
     // Uninstall & Setup
     setupComplete: 'codebuddy-hud setup complete.',
@@ -81,6 +83,7 @@ const DICTIONARY = {
     unicodeSupport: 'Unicode Support',
     gitEnvironment: 'Git Environment & Active Repo',
     transcriptAccess: 'Transcript Directory Access',
+    retainedBackups: 'Retained settings recovery copies',
     hostRefreshProtocol: 'Host Refresh Architecture',
     doctorNodeOld: 'Node.js version is too old, requires >= 18.0.0',
     doctorSettingsMissing: 'settings.json not found, run codebuddy-hud --setup first',
@@ -89,6 +92,7 @@ const DICTIONARY = {
     doctorCodepageWarn: 'Recommendation: run "chcp 65001" for optimal UTF-8 rendering',
     doctorGitBranchSlow: 'Git branch resolution latency is high',
     doctorTranscriptMissing: 'Transcript directory not found or empty',
+    doctorRetainedBackups: 'Uninstall left original-settings copies behind; delete them manually once confirmed unneeded',
 
     // Uninstall & Setup
     setupComplete: 'codebuddy-hud setup complete.',
diff --git a/runtime/theme-selector.js b/runtime/theme-selector.js
index 113aeb1..be44d98 100644
--- a/runtime/theme-selector.js
+++ b/runtime/theme-selector.js
@@ -39,10 +39,17 @@ function saveUserTheme(themeName) {
   try {
     userConfig = JSON.parse(fs.readFileSync(configPath, 'utf8'));
   } catch (err) {
-    if (!err || err.code !== 'ENOENT') throw err;
+    if (!err || err.code === 'ENOENT') {
+      userConfig = {};
+    } else if (err instanceof SyntaxError) {
+      throw new Error(`Invalid HUD config at ${configPath}: ${err.message}. ` +
+        'HUD config must be strict JSON (no comments or trailing commas); the original file was left unchanged.');
+    } else {
+      throw err;
+    }
   }
   if (!isSettingsObject(userConfig)) {
-    throw new Error('HUD config root must be a JSON object');
+    throw new Error(`HUD config root must be a JSON object: ${configPath}`);
   }
   userConfig.theme = themeName;
   atomicWriteSettingsFile(configPath, JSON.stringify(userConfig, null, 2));
diff --git a/tests/unit/bootstrap.test.mjs b/tests/unit/bootstrap.test.mjs
index 687da7a..d918f16 100644
--- a/tests/unit/bootstrap.test.mjs
+++ b/tests/unit/bootstrap.test.mjs
@@ -22,6 +22,9 @@ describe('bootstrap installer', () => {
     const manifest = new Set(RUNTIME_FILES);
     assert.equal(manifest.size, RUNTIME_FILES.length, 'manifest must not contain duplicate downloads');
     assert.ok(manifest.has('LICENSE'));
+    for (const rel of RUNTIME_FILES) {
+      assert.ok(fs.existsSync(path.join(repoRoot, rel)), `manifest entry missing from repo: ${rel}`);
+    }
     const visit = dir => {
       for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
         const full = path.join(dir, entry.name);
diff --git a/tests/unit/doctor.test.mjs b/tests/unit/doctor.test.mjs
index 3d67946..c7b5065 100644
--- a/tests/unit/doctor.test.mjs
+++ b/tests/unit/doctor.test.mjs
@@ -165,6 +165,44 @@ describe('doctor diagnosis tool', () => {
     });
   });
 
+  test('reports ok when no retained settings backups exist', () => {
+    withIsolatedSettings(({ tmpDir }) => {
+      fs.writeFileSync(path.join(tmpDir, 'settings.json.bak.codebuddy-hud'), '{}');
+      const check = runDoctor({ cwd: process.cwd() }).checks
+        .find(c => c.category === 'codebuddy' && (c.name.includes('Retained') || c.name.includes('残留')));
+      assert.ok(check);
+      assert.equal(check.status, 'ok');
+    });
+  });
+
+  test('flags retained settings backups for manual review without auto-deleting', () => {
+    withIsolatedSettings(({ tmpDir }) => {
+      const names = [1, 2].map(n => `settings.json.bak.codebuddy-hud.retained-100${n}-9${n}`);
+      for (const name of names) fs.writeFileSync(path.join(tmpDir, name), '{}');
+      fs.writeFileSync(path.join(tmpDir, 'settings.json.bak.codebuddy-hud'), '{}');
+      const check = runDoctor({ cwd: process.cwd() }).checks
+        .find(c => c.category === 'codebuddy' && (c.name.includes('Retained') || c.name.includes('残留')));
+      assert.ok(check);
+      assert.equal(check.status, 'warn');
+      for (const name of names) assert.ok(check.detail.includes(name));
+      assert.ok(check.message && check.message.length > 0);
+      for (const name of names) assert.ok(fs.existsSync(path.join(tmpDir, name)), 'doctor must not delete retained copies');
+    });
+  });
+
+  test('caps the retained-backup listing instead of dumping every file', () => {
+    withIsolatedSettings(({ tmpDir }) => {
+      for (let n = 0; n < 7; n++) {
+        fs.writeFileSync(path.join(tmpDir, `settings.json.bak.codebuddy-hud.retained-200${n}-7${n}`), '{}');
+      }
+      const check = runDoctor({ cwd: process.cwd() }).checks
+        .find(c => c.category === 'codebuddy' && (c.name.includes('Retained') || c.name.includes('残留')));
+      assert.ok(check);
+      assert.equal(check.status, 'warn');
+      assert.ok(check.detail.includes('and 2 more'));
+    });
+  });
+
   test('flags a Windows shim whose forwarded script is missing', () => {
     withIsolatedSettings(({ tmpDir, writeSettings }) => {
       const shim = path.join(tmpDir, 'bin', 'codebuddy-hud.cmd');
diff --git a/tests/unit/theme-selector.test.mjs b/tests/unit/theme-selector.test.mjs
index cedf09f..47d8919 100644
--- a/tests/unit/theme-selector.test.mjs
+++ b/tests/unit/theme-selector.test.mjs
@@ -110,6 +110,30 @@ describe('theme-selector', () => {
     }
   });
 
+  it('reports invalid user config with the file path and strict-JSON hint', () => {
+    const configPath = path.join(process.env.CODEBUDDY_HOME, 'codebuddy-hud.config.json');
+    try {
+      for (const raw of ['{"display":{"showCost":false},}', '']) {
+        fs.writeFileSync(configPath, raw);
+        assert.throws(() => saveUserTheme('amber'), err => {
+          assert.ok(err.message.includes(configPath), 'error must name the config file');
+          assert.ok(err.message.includes('strict JSON'), 'error must explain the strict-JSON rule');
+          assert.ok(err.message.includes('left unchanged'), 'error must confirm the file was preserved');
+          return true;
+        });
+        assert.equal(fs.readFileSync(configPath, 'utf8'), raw);
+      }
+      fs.writeFileSync(configPath, '[]');
+      assert.throws(() => saveUserTheme('amber'), err => {
+        assert.ok(err.message.includes('must be a JSON object'));
+        assert.ok(err.message.includes(configPath));
+        return true;
+      });
+    } finally {
+      fs.rmSync(configPath, { force: true });
+    }
+  });
+
   it('preserves other options and refuses writes through multiple hard links', () => {
     const configPath = path.join(process.env.CODEBUDDY_HOME, 'codebuddy-hud.config.json');
     const linkedPath = path.join(tmpDir, 'theme-hardlink.json');