diff --git a/.github/workflows/skyeye-credential-audit.yml b/.github/workflows/skyeye-credential-audit.yml
new file mode 100644
index 00000000..cf762806
--- /dev/null
+++ b/.github/workflows/skyeye-credential-audit.yml
@@ -0,0 +1,49 @@
+# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+# 🛰️ 天眼密钥流审计 (Sky-Eye Credential Audit)
+#
+# 守护: PER-ZY001 铸渊 (Zhuyuan)
+# 系统: SYS-GLW-0001
+# 主控: TCS-0002∞ (冰朔)
+#
+# 功能:
+#   ① GOOGLE_DRIVE_SERVICE_ACCOUNT 密钥流完整性校验
+#   ② 依赖图扫描（工作流 + 脚本）
+#   ③ YAML 语法全量扫描
+#   ④ 审计报告归档至 System_Logs/
+# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+name: "🛰️ 天眼密钥流审计 (Sky-Eye Credential Audit)"
+
+on:
+  schedule:
+    # 每天 UTC 14:00 (CST 22:00) 执行一次审计
+    - cron: "0 14 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  credential-audit:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "📦 Checkout"
+        uses: actions/checkout@v4
+
+      - name: "🛰️ Run Sky-Eye Credential Audit"
+        env:
+          GOOGLE_DRIVE_SERVICE_ACCOUNT: ${{ secrets.GOOGLE_DRIVE_SERVICE_ACCOUNT }}
+        run: node scripts/skyeye/credential-audit.js
+
+      - name: "📝 Commit audit report"
+        if: always()
+        run: |
+          git config user.name "zhuyuan-bot"
+          git config user.email "zhuyuan-bot@guanghulab.com"
+          git add System_Logs/ skyeye/logs/
+          if git diff --cached --quiet; then
+            echo "No changes to commit"
+          else
+            git commit -m "🛰️ [Sky-Eye Audit] credential audit report [skip ci]"
+            git push
+          fi
diff --git a/.github/workflows/sync-repo-to-drive.yml b/.github/workflows/sync-repo-to-drive.yml
index 6ea6e2ea..973445f7 100644
--- a/.github/workflows/sync-repo-to-drive.yml
+++ b/.github/workflows/sync-repo-to-drive.yml
@@ -49,6 +49,14 @@ jobs:
           printf '%s\n' "${GOOGLE_DRIVE_SERVICE_ACCOUNT}" > "${SA_FILE}"
           chmod 600 "${SA_FILE}"
 
+          # 天眼密钥流校验：验证 JSON 完整性
+          if ! python3 -c "import json,sys; json.load(open(sys.argv[1]))" "${SA_FILE}" 2>/dev/null; then
+            echo "::error::GOOGLE_DRIVE_SERVICE_ACCOUNT contains invalid JSON (possible truncation)"
+            rm -f "${SA_FILE}"
+            exit 1
+          fi
+          echo "✅ Service account JSON validated"
+
           mkdir -p "${HOME}/.config/rclone"
           {
             echo "[gdrive]"
diff --git a/System_Logs/.gitkeep b/System_Logs/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/scripts/grid-db/deploy-drive-bridge.js b/scripts/grid-db/deploy-drive-bridge.js
index 208b03bb..1a0e0ff9 100644
--- a/scripts/grid-db/deploy-drive-bridge.js
+++ b/scripts/grid-db/deploy-drive-bridge.js
@@ -303,8 +303,28 @@ async function deploy(commandFilePath) {
     return;
   }
 
-  // 认证 Google Drive API
-  const credentials = JSON.parse(serviceAccountJson);
+  // 认证 Google Drive API（天眼密钥流校验）
+  let credentials;
+  try {
+    const { validateServiceAccountJSON, formatDiagnosticReport } = require('../skyeye/credential-validator');
+    const validation = validateServiceAccountJSON(serviceAccountJson);
+    if (!validation.valid) {
+      console.error('[deploy] 🔴 Credential validation failed:');
+      console.error(formatDiagnosticReport(validation));
+      writeReceipt(deploy_id, dev_id, 'failed', `Credential validation failed: ${validation.issues.join('; ')}`);
+      return;
+    }
+    credentials = validation.credentials;
+    console.log('[deploy] ✅ Service account credentials validated');
+  } catch (err) {
+    // Fallback: if validator module is unavailable, try direct parse
+    try {
+      credentials = JSON.parse(serviceAccountJson);
+    } catch (parseErr) {
+      writeReceipt(deploy_id, dev_id, 'failed', `JSON parse error: ${parseErr.message}`);
+      return;
+    }
+  }
   const auth = new google.auth.GoogleAuth({
     credentials,
     scopes: ['https://www.googleapis.com/auth/drive']
diff --git a/scripts/grid-db/sync-to-drive.js b/scripts/grid-db/sync-to-drive.js
index ff4bddf5..1b6c0188 100644
--- a/scripts/grid-db/sync-to-drive.js
+++ b/scripts/grid-db/sync-to-drive.js
@@ -181,13 +181,26 @@ async function main() {
     return;
   }
 
-  // 解析 Service Account 凭证
+  // 解析 Service Account 凭证（天眼密钥流校验）
   let credentials;
   try {
-    credentials = JSON.parse(serviceAccountJson);
+    const { validateServiceAccountJSON, formatDiagnosticReport } = require('../skyeye/credential-validator');
+    const validation = validateServiceAccountJSON(serviceAccountJson);
+    if (!validation.valid) {
+      console.error('[sync-to-drive] 🔴 Credential validation failed:');
+      console.error(formatDiagnosticReport(validation));
+      process.exit(1);
+    }
+    credentials = validation.credentials;
+    console.log('[sync-to-drive] ✅ Service account credentials validated');
   } catch (err) {
-    console.error('[sync-to-drive] Failed to parse service account JSON:', err.message);
-    process.exit(1);
+    // Fallback: if validator module is unavailable, try direct parse
+    try {
+      credentials = JSON.parse(serviceAccountJson);
+    } catch (parseErr) {
+      console.error('[sync-to-drive] Failed to parse service account JSON:', parseErr.message);
+      process.exit(1);
+    }
   }
 
   // 认证 Google Drive API
diff --git a/scripts/skyeye/credential-audit.js b/scripts/skyeye/credential-audit.js
new file mode 100644
index 00000000..fd59699b
--- /dev/null
+++ b/scripts/skyeye/credential-audit.js
@@ -0,0 +1,268 @@
+#!/usr/bin/env node
+/**
+ * scripts/skyeye/credential-audit.js
+ *
+ * 天眼全域系统审计 (Sky-Eye Credential Audit)
+ *
+ * 功能：
+ *   ① 校验 GOOGLE_DRIVE_SERVICE_ACCOUNT 密钥流完整性
+ *   ② 扫描所有依赖该密钥的工作流和脚本
+ *   ③ 验证 YAML 语法（.github/workflows/ 下所有配置文件）
+ *   ④ 生成审计报告写入 System_Logs/
+ *
+ * 环境变量：
+ *   - GOOGLE_DRIVE_SERVICE_ACCOUNT: (可选) 用于实际校验
+ *
+ * 用法：node scripts/skyeye/credential-audit.js
+ *
+ * 守护: PER-ZY001 铸渊
+ * 系统: SYS-GLW-0001
+ * 主控: TCS-0002∞ (冰朔)
+ */
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const { validateServiceAccountJSON, formatDiagnosticReport } = require('./credential-validator');
+
+const ROOT = path.resolve(__dirname, '../..');
+const WORKFLOWS_DIR = path.join(ROOT, '.github/workflows');
+const SYSTEM_LOGS_DIR = path.join(ROOT, 'System_Logs');
+
+function getTimestamp() {
+  return new Date().toISOString();
+}
+
+function getDateStr() {
+  return new Date().toISOString().slice(0, 10).replace(/-/g, '');
+}
+
+// ═══════════════════════════════════════════════
+// ① 密钥流校验
+// ═══════════════════════════════════════════════
+
+function auditCredential() {
+  const serviceAccountJson = process.env.GOOGLE_DRIVE_SERVICE_ACCOUNT;
+
+  if (!serviceAccountJson) {
+    return {
+      status: 'skipped',
+      reason: 'GOOGLE_DRIVE_SERVICE_ACCOUNT not available in environment',
+      recommendation: 'Run this audit in a GitHub Actions workflow with the secret configured'
+    };
+  }
+
+  const validation = validateServiceAccountJSON(serviceAccountJson);
+  return {
+    status: validation.valid ? 'pass' : 'fail',
+    diagnostics: {
+      ...validation.diagnostics,
+      // Never expose credential values in reports
+      credentials: undefined
+    },
+    issues: validation.issues,
+    report: formatDiagnosticReport(validation)
+  };
+}
+
+// ═══════════════════════════════════════════════
+// ② 依赖图扫描
+// ═══════════════════════════════════════════════
+
+function scanCredentialDependencies() {
+  const results = {
+    workflows: [],
+    scripts: [],
+    total_dependents: 0
+  };
+
+  const SEARCH_PATTERN = 'GOOGLE_DRIVE_SERVICE_ACCOUNT';
+
+  // 扫描 workflows
+  if (fs.existsSync(WORKFLOWS_DIR)) {
+    const files = fs.readdirSync(WORKFLOWS_DIR).filter(f => f.endsWith('.yml') || f.endsWith('.yaml'));
+    for (const file of files) {
+      try {
+        const content = fs.readFileSync(path.join(WORKFLOWS_DIR, file), 'utf8');
+        if (content.includes(SEARCH_PATTERN)) {
+          results.workflows.push(file);
+        }
+      } catch (e) {
+        // Skip unreadable files
+      }
+    }
+  }
+
+  // 扫描 scripts
+  const scriptDirs = [
+    path.join(ROOT, 'scripts'),
+    path.join(ROOT, 'scripts/grid-db'),
+    path.join(ROOT, 'scripts/skyeye')
+  ];
+
+  for (const dir of scriptDirs) {
+    if (!fs.existsSync(dir)) continue;
+    const files = fs.readdirSync(dir).filter(f => f.endsWith('.js'));
+    for (const file of files) {
+      try {
+        const content = fs.readFileSync(path.join(dir, file), 'utf8');
+        if (content.includes(SEARCH_PATTERN)) {
+          const relPath = path.relative(ROOT, path.join(dir, file));
+          results.scripts.push(relPath);
+        }
+      } catch (e) {
+        // Skip unreadable files
+      }
+    }
+  }
+
+  results.total_dependents = results.workflows.length + results.scripts.length;
+  return results;
+}
+
+// ═══════════════════════════════════════════════
+// ③ YAML 语法扫描
+// ═══════════════════════════════════════════════
+
+function scanYAMLSyntax() {
+  const results = {
+    total: 0,
+    valid: 0,
+    issues: []
+  };
+
+  if (!fs.existsSync(WORKFLOWS_DIR)) {
+    results.issues.push({ file: '.github/workflows/', error: 'Directory not found' });
+    return results;
+  }
+
+  const files = fs.readdirSync(WORKFLOWS_DIR).filter(f => f.endsWith('.yml') || f.endsWith('.yaml'));
+  results.total = files.length;
+
+  for (const file of files) {
+    const filePath = path.join(WORKFLOWS_DIR, file);
+    try {
+      const content = fs.readFileSync(filePath, 'utf8');
+
+      // Basic YAML structural checks (without full YAML parser)
+      const lines = content.split('\n');
+      let hasName = false;
+      let hasOn = false;
+      let hasJobs = false;
+      let tabIssues = 0;
+
+      for (let i = 0; i < lines.length; i++) {
+        const line = lines[i];
+        if (/^name:/.test(line)) hasName = true;
+        if (/^on:/.test(line) || /^'on':/.test(line) || /^"on":/.test(line)) hasOn = true;
+        if (/^jobs:/.test(line)) hasJobs = true;
+        // Check for tabs (YAML should use spaces)
+        if (line.includes('\t')) tabIssues++;
+      }
+
+      const fileIssues = [];
+      if (!hasName) fileIssues.push('Missing top-level "name:" field');
+      if (!hasOn) fileIssues.push('Missing top-level "on:" trigger');
+      if (!hasJobs) fileIssues.push('Missing top-level "jobs:" section');
+      if (tabIssues > 0) fileIssues.push(`${tabIssues} line(s) contain tabs (use spaces)`);
+
+      if (fileIssues.length > 0) {
+        results.issues.push({ file, errors: fileIssues });
+      } else {
+        results.valid++;
+      }
+    } catch (e) {
+      results.issues.push({ file, errors: [`Read error: ${e.message}`] });
+    }
+  }
+
+  return results;
+}
+
+// ═══════════════════════════════════════════════
+// ④ 生成审计报告
+// ═══════════════════════════════════════════════
+
+function run() {
+  console.log('╔════════════════════════════════════════════════════════╗');
+  console.log('║  🛰️ 天眼全域系统审计 (Sky-Eye Audit)                ║');
+  console.log('║  TCS-0002∞ → PER-ZY001                              ║');
+  console.log('╚════════════════════════════════════════════════════════╝');
+  console.log('');
+
+  const auditReport = {
+    audit_id: `AUDIT-${getDateStr()}`,
+    timestamp: getTimestamp(),
+    system: 'SYS-GLW-0001',
+    guardian: 'PER-ZY001',
+    controller: 'TCS-0002∞',
+    credential_audit: auditCredential(),
+    dependency_scan: scanCredentialDependencies(),
+    yaml_scan: scanYAMLSyntax(),
+    summary: {}
+  };
+
+  // Summary
+  const credStatus = auditReport.credential_audit.status;
+  const yamlIssues = auditReport.yaml_scan.issues.length;
+  const totalDeps = auditReport.dependency_scan.total_dependents;
+
+  auditReport.summary = {
+    credential_status: credStatus,
+    yaml_issues: yamlIssues,
+    yaml_total: auditReport.yaml_scan.total,
+    yaml_valid: auditReport.yaml_scan.valid,
+    total_credential_dependents: totalDeps,
+    overall_status: credStatus === 'pass' && yamlIssues === 0 ? 'GREEN' : 'RED'
+  };
+
+  // Console output
+  console.log(`[Sky-Eye Audit] Credential status: ${credStatus}`);
+  if (auditReport.credential_audit.report) {
+    console.log('');
+    console.log(auditReport.credential_audit.report);
+  }
+  console.log('');
+  console.log(`[Sky-Eye Audit] Credential dependents: ${totalDeps} (${auditReport.dependency_scan.workflows.length} workflows, ${auditReport.dependency_scan.scripts.length} scripts)`);
+  console.log(`[Sky-Eye Audit] YAML scan: ${auditReport.yaml_scan.valid}/${auditReport.yaml_scan.total} valid`);
+
+  if (yamlIssues > 0) {
+    console.log(`[Sky-Eye Audit] YAML issues found in ${yamlIssues} file(s):`);
+    for (const issue of auditReport.yaml_scan.issues) {
+      console.log(`  - ${issue.file}: ${issue.errors ? issue.errors.join('; ') : issue.error}`);
+    }
+  }
+
+  console.log('');
+  console.log(`[Sky-Eye Audit] Overall: ${auditReport.summary.overall_status === 'GREEN' ? '✅ 绿色信号' : '🔴 逻辑红区'}`);
+
+  // Write report to System_Logs/
+  if (!fs.existsSync(SYSTEM_LOGS_DIR)) {
+    fs.mkdirSync(SYSTEM_LOGS_DIR, { recursive: true });
+  }
+  const reportPath = path.join(SYSTEM_LOGS_DIR, `credential-audit-${getDateStr()}.json`);
+  // Ensure no credential data leaks into the report
+  const safeReport = JSON.parse(JSON.stringify(auditReport));
+  if (safeReport.credential_audit && safeReport.credential_audit.diagnostics) {
+    delete safeReport.credential_audit.diagnostics.context_at_error;
+  }
+  fs.writeFileSync(reportPath, JSON.stringify(safeReport, null, 2) + '\n', 'utf8');
+  console.log(`[Sky-Eye Audit] Report saved: ${reportPath}`);
+
+  // Also write to skyeye logs
+  const skyeyeLogDir = path.join(ROOT, 'skyeye/logs/daily');
+  if (!fs.existsSync(skyeyeLogDir)) {
+    fs.mkdirSync(skyeyeLogDir, { recursive: true });
+  }
+  const skyeyeLogPath = path.join(skyeyeLogDir, `credential-audit-${getDateStr()}.json`);
+  fs.writeFileSync(skyeyeLogPath, JSON.stringify(safeReport, null, 2) + '\n', 'utf8');
+
+  console.log('');
+  console.log('---AUDIT_RESULT_JSON---');
+  console.log(JSON.stringify(safeReport, null, 2));
+
+  return auditReport;
+}
+
+run();
diff --git a/scripts/skyeye/credential-validator.js b/scripts/skyeye/credential-validator.js
new file mode 100644
index 00000000..de72b3a2
--- /dev/null
+++ b/scripts/skyeye/credential-validator.js
@@ -0,0 +1,233 @@
+#!/usr/bin/env node
+/**
+ * scripts/skyeye/credential-validator.js
+ *
+ * 天眼密钥流完整性校验器 (Sky-Eye Credential Validator)
+ *
+ * 功能：对 Google Drive Service Account JSON 执行结构化检测
+ *   - JSON 语法完整性（检测未闭合 {} / 截断）
+ *   - 必需字段存在性验证
+ *   - 字段值格式校验（private_key PEM 格式等）
+ *
+ * 可作为模块 require() 使用，也可直接运行：
+ *   GOOGLE_DRIVE_SERVICE_ACCOUNT='...' node credential-validator.js
+ *
+ * 守护: PER-ZY001 铸渊
+ * 系统: SYS-GLW-0001
+ * 主控: TCS-0002∞ (冰朔)
+ */
+
+'use strict';
+
+// Google Service Account JSON 必需字段
+const REQUIRED_FIELDS = [
+  'type',
+  'project_id',
+  'private_key_id',
+  'private_key',
+  'client_email',
+  'client_id',
+  'auth_uri',
+  'token_uri'
+];
+
+/**
+ * 验证 Service Account JSON 字符串
+ * @param {string} jsonStr - JSON 字符串
+ * @returns {{ valid: boolean, credentials: object|null, issues: string[], diagnostics: object }}
+ */
+function validateServiceAccountJSON(jsonStr) {
+  const result = {
+    valid: false,
+    credentials: null,
+    issues: [],
+    diagnostics: {
+      input_length: 0,
+      is_empty: true,
+      json_parseable: false,
+      is_object: false,
+      has_all_required_fields: false,
+      missing_fields: [],
+      field_checks: {},
+      truncation_suspected: false
+    }
+  };
+
+  // ① 空值检查
+  if (!jsonStr || typeof jsonStr !== 'string') {
+    result.issues.push('Credential string is empty or not a string');
+    return result;
+  }
+
+  const trimmed = jsonStr.trim();
+  result.diagnostics.input_length = trimmed.length;
+  result.diagnostics.is_empty = trimmed.length === 0;
+
+  if (trimmed.length === 0) {
+    result.issues.push('Credential string is empty after trimming');
+    return result;
+  }
+
+  // ② 基本结构检查（闭合括号）
+  if (!trimmed.startsWith('{')) {
+    result.issues.push(`JSON does not start with '{' (starts with '${trimmed[0]}')`);
+  }
+  if (!trimmed.endsWith('}')) {
+    result.issues.push(`JSON does not end with '}' (ends with '${trimmed[trimmed.length - 1]}')`);
+    result.diagnostics.truncation_suspected = true;
+  }
+
+  // 检查大括号平衡
+  let braceDepth = 0;
+  for (let i = 0; i < trimmed.length; i++) {
+    if (trimmed[i] === '{') braceDepth++;
+    else if (trimmed[i] === '}') braceDepth--;
+  }
+  if (braceDepth !== 0) {
+    result.issues.push(`Unbalanced braces: depth=${braceDepth} (${braceDepth > 0 ? 'missing closing }' : 'extra closing }'})`);
+    result.diagnostics.truncation_suspected = braceDepth > 0;
+  }
+
+  // ③ JSON 解析
+  let parsed;
+  try {
+    parsed = JSON.parse(trimmed);
+    result.diagnostics.json_parseable = true;
+  } catch (err) {
+    result.issues.push(`JSON parse error: ${err.message}`);
+    // 尝试诊断截断位置
+    const posMatch = err.message.match(/position (\d+)/);
+    if (posMatch) {
+      const pos = parseInt(posMatch[1], 10);
+      result.diagnostics.error_position = pos;
+      result.diagnostics.context_at_error = trimmed.substring(
+        Math.max(0, pos - 30),
+        Math.min(trimmed.length, pos + 30)
+      );
+    }
+    return result;
+  }
+
+  // ④ 类型检查
+  if (typeof parsed !== 'object' || parsed === null || Array.isArray(parsed)) {
+    result.issues.push('Parsed JSON is not a plain object');
+    return result;
+  }
+
+  result.diagnostics.is_object = true;
+  result.credentials = parsed;
+
+  // ⑤ 必需字段检查
+  for (const field of REQUIRED_FIELDS) {
+    if (!(field in parsed) || parsed[field] === undefined || parsed[field] === null || parsed[field] === '') {
+      result.diagnostics.missing_fields.push(field);
+      result.issues.push(`Missing or empty required field: '${field}'`);
+    }
+  }
+
+  result.diagnostics.has_all_required_fields = result.diagnostics.missing_fields.length === 0;
+
+  // ⑥ 字段格式校验
+  if (parsed.type) {
+    const typeOk = parsed.type === 'service_account';
+    result.diagnostics.field_checks.type = typeOk ? 'ok' : `expected 'service_account', got '${parsed.type}'`;
+    if (!typeOk) result.issues.push(`Field 'type' should be 'service_account', got '${parsed.type}'`);
+  }
+
+  if (parsed.private_key) {
+    const pkStr = String(parsed.private_key);
+    const hasBegin = pkStr.includes('-----BEGIN');
+    const hasEnd = pkStr.includes('-----END');
+    result.diagnostics.field_checks.private_key_format = hasBegin && hasEnd ? 'ok' : 'PEM markers missing';
+    if (!hasBegin || !hasEnd) {
+      result.issues.push('Field \'private_key\' does not contain valid PEM BEGIN/END markers');
+      result.diagnostics.truncation_suspected = true;
+    }
+  }
+
+  if (parsed.client_email) {
+    const emailOk = String(parsed.client_email).includes('@') && String(parsed.client_email).includes('.iam.gserviceaccount.com');
+    result.diagnostics.field_checks.client_email_format = emailOk ? 'ok' : 'not a valid service account email';
+    if (!emailOk) result.issues.push('Field \'client_email\' does not match service account email pattern');
+  }
+
+  // ⑦ 最终判定
+  result.valid = result.issues.length === 0;
+  return result;
+}
+
+/**
+ * 生成人类可读的诊断报告
+ * @param {object} validationResult - validateServiceAccountJSON 的返回值
+ * @returns {string}
+ */
+function formatDiagnosticReport(validationResult) {
+  const r = validationResult;
+  const lines = [];
+
+  lines.push('╔════════════════════════════════════════════════════════╗');
+  lines.push('║  🛰️ 天眼密钥流完整性校验报告 (Credential Audit)     ║');
+  lines.push('╚════════════════════════════════════════════════════════╝');
+  lines.push('');
+  lines.push(`状态: ${r.valid ? '✅ 绿色信号 (PASS)' : '🔴 逻辑红区 (FAIL)'}`);
+  lines.push(`输入长度: ${r.diagnostics.input_length} bytes`);
+  lines.push(`JSON 可解析: ${r.diagnostics.json_parseable ? '是' : '否'}`);
+  lines.push(`是否为对象: ${r.diagnostics.is_object ? '是' : '否'}`);
+  lines.push(`全部必需字段: ${r.diagnostics.has_all_required_fields ? '齐全' : '缺失'}`);
+  lines.push(`截断嫌疑: ${r.diagnostics.truncation_suspected ? '⚠️ 是' : '否'}`);
+
+  if (r.diagnostics.missing_fields.length > 0) {
+    lines.push(`缺失字段: ${r.diagnostics.missing_fields.join(', ')}`);
+  }
+
+  if (r.diagnostics.error_position !== undefined) {
+    lines.push(`错误位置: position ${r.diagnostics.error_position}`);
+    lines.push(`上下文: ...${r.diagnostics.context_at_error}...`);
+  }
+
+  if (Object.keys(r.diagnostics.field_checks).length > 0) {
+    lines.push('');
+    lines.push('字段检查:');
+    for (const [k, v] of Object.entries(r.diagnostics.field_checks)) {
+      lines.push(`  ${k}: ${v}`);
+    }
+  }
+
+  if (r.issues.length > 0) {
+    lines.push('');
+    lines.push('发现问题:');
+    r.issues.forEach((issue, i) => {
+      lines.push(`  ${i + 1}. ${issue}`);
+    });
+  }
+
+  return lines.join('\n');
+}
+
+// ═══════════════════════════════════════════════
+// 模块导出
+// ═══════════════════════════════════════════════
+
+module.exports = { validateServiceAccountJSON, formatDiagnosticReport, REQUIRED_FIELDS };
+
+// ═══════════════════════════════════════════════
+// CLI 模式
+// ═══════════════════════════════════════════════
+
+if (require.main === module) {
+  const jsonStr = process.env.GOOGLE_DRIVE_SERVICE_ACCOUNT;
+  if (!jsonStr) {
+    console.error('[credential-validator] GOOGLE_DRIVE_SERVICE_ACCOUNT not set');
+    process.exit(1);
+  }
+
+  const result = validateServiceAccountJSON(jsonStr);
+  console.log(formatDiagnosticReport(result));
+  console.log('');
+  console.log('---CREDENTIAL_AUDIT_JSON---');
+  // 不输出 credentials 本身以避免泄露密钥
+  const safeResult = { ...result, credentials: result.credentials ? '[REDACTED]' : null };
+  console.log(JSON.stringify(safeResult, null, 2));
+
+  process.exit(result.valid ? 0 : 1);
+}
diff --git a/scripts/tcs-semantic-landing.js b/scripts/tcs-semantic-landing.js
index e5e7ff64..2a556a45 100644
--- a/scripts/tcs-semantic-landing.js
+++ b/scripts/tcs-semantic-landing.js
@@ -40,7 +40,22 @@ const LANDING_SUBFOLDER = 'tcs-semantic-landing';
 // ═══════════════════════════════════════════════
 
 function buildAuth(serviceAccountJson) {
-  const credentials = JSON.parse(serviceAccountJson);
+  let credentials;
+  try {
+    const { validateServiceAccountJSON, formatDiagnosticReport } = require('./skyeye/credential-validator');
+    const validation = validateServiceAccountJSON(serviceAccountJson);
+    if (!validation.valid) {
+      console.error('[semantic-landing] 🔴 Credential validation failed:');
+      console.error(formatDiagnosticReport(validation));
+      throw new Error('Service account credential validation failed');
+    }
+    credentials = validation.credentials;
+    console.log('[semantic-landing] ✅ Service account credentials validated');
+  } catch (err) {
+    if (err.message === 'Service account credential validation failed') throw err;
+    // Fallback: if validator module is unavailable, try direct parse
+    credentials = JSON.parse(serviceAccountJson);
+  }
   return new google.auth.GoogleAuth({
     credentials,
     scopes: [
diff --git a/skyeye/scripts/self-healer.js b/skyeye/scripts/self-healer.js
index b24e6e6c..14181ec9 100644
--- a/skyeye/scripts/self-healer.js
+++ b/skyeye/scripts/self-healer.js
@@ -182,7 +182,8 @@ function ensureDirectories() {
     'skyeye/logs/weekly',
     'buffer/inbox',
     'buffer/staging',
-    'buffer/processed'
+    'buffer/processed',
+    'System_Logs'
   ];
 
   for (const dir of requiredDirs) {
@@ -197,6 +198,37 @@ function ensureDirectories() {
   return results;
 }
 
+/**
+ * 天眼密钥流校验 — 验证 GOOGLE_DRIVE_SERVICE_ACCOUNT 环境变量
+ * 仅在环境变量可用时执行（CI 环境）
+ */
+function validateCredentials() {
+  const result = { status: 'skipped', issues: [] };
+
+  const serviceAccountJson = process.env.GOOGLE_DRIVE_SERVICE_ACCOUNT;
+  if (!serviceAccountJson) {
+    result.reason = 'GOOGLE_DRIVE_SERVICE_ACCOUNT not available';
+    return result;
+  }
+
+  try {
+    const { validateServiceAccountJSON } = require('../../scripts/skyeye/credential-validator');
+    const validation = validateServiceAccountJSON(serviceAccountJson);
+    result.status = validation.valid ? 'pass' : 'fail';
+    result.issues = validation.issues;
+    if (!validation.valid) {
+      console.log(`  [CREDENTIAL] 🔴 Validation failed: ${validation.issues.join('; ')}`);
+    } else {
+      console.log('  [CREDENTIAL] ✅ Service account credentials valid');
+    }
+  } catch (e) {
+    result.status = 'error';
+    result.reason = `Validator load error: ${e.message}`;
+  }
+
+  return result;
+}
+
 function run() {
   console.log(`[SkyEye Self-Healer] Starting self-heal process`);
   console.log(`[SkyEye Self-Healer] Timestamp: ${getTimestamp()}`);
@@ -209,6 +241,7 @@ function run() {
     log_cleanup: cleanExpiredLogs(),
     guard_restarts: restartSuspendedGuards(),
     directory_fixes: ensureDirectories(),
+    credential_check: validateCredentials(),
     summary: {}
   };
 
@@ -216,7 +249,8 @@ function run() {
     configs_repaired: healResult.guard_repairs.repaired.length,
     files_cleaned: healResult.buffer_cleanup.files_cleaned + healResult.log_cleanup.files_cleaned,
     guards_restarted: healResult.guard_restarts.restarted.length,
-    directories_created: healResult.directory_fixes.created.length
+    directories_created: healResult.directory_fixes.created.length,
+    credential_status: healResult.credential_check.status
   };
 
   // Write log
@@ -229,6 +263,7 @@ function run() {
   console.log(`[SkyEye Self-Healer] Files cleaned: ${healResult.summary.files_cleaned}`);
   console.log(`[SkyEye Self-Healer] Guards restarted: ${healResult.summary.guards_restarted}`);
   console.log(`[SkyEye Self-Healer] Dirs created: ${healResult.summary.directories_created}`);
+  console.log(`[SkyEye Self-Healer] Credential status: ${healResult.summary.credential_status}`);
   console.log(`[SkyEye Self-Healer] Log saved: ${logPath}`);
 
   console.log('---HEAL_RESULT_JSON---');