diff --git a/.github/workflows/zhuyuan-exec-engine.yml b/.github/workflows/zhuyuan-exec-engine.yml
index 3cfebc09..fca2821c 100644
--- a/.github/workflows/zhuyuan-exec-engine.yml
+++ b/.github/workflows/zhuyuan-exec-engine.yml
@@ -52,7 +52,7 @@ jobs:
           echo "🦅 天眼强制前置：检查健康状态..."
           # 读取最新天眼报告（从 notion-cache 或 skyeye-core）
           if [ -f ".github/notion-cache/skyeye/latest-report.json" ]; then
-            STATUS=$(cat .github/notion-cache/skyeye/latest-report.json | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('overall_status','unknown'))" 2>/dev/null || echo "unknown")
+            STATUS=$(node -e "try{const d=require('./.github/notion-cache/skyeye/latest-report.json');console.log(d.overall_status||'unknown')}catch(_){console.log('unknown')}" 2>/dev/null || echo "unknown")
             echo "天眼缓存状态：$STATUS"
             if [ "$STATUS" = "critical" ] || [ "$STATUS" = "error" ]; then
               echo "❌ 天眼报告严重问题，暂停执行"
diff --git a/services/zhuyuan-bridge/lib/github-auth.js b/services/zhuyuan-bridge/lib/github-auth.js
index 49d3ce53..49760908 100644
--- a/services/zhuyuan-bridge/lib/github-auth.js
+++ b/services/zhuyuan-bridge/lib/github-auth.js
@@ -15,9 +15,13 @@
 
 const https = require('https');
 
+// 模块级检查：jsonwebtoken 是否可用
+let jwtLib = null;
+try { jwtLib = require('jsonwebtoken'); } catch (_) { /* fallback to crypto */ }
+
 /**
- * 用 App Private Key 生成 JWT（不依赖 jsonwebtoken 库的 fallback 实现）
- * 在 CI 环境中可能没有安装 jsonwebtoken，因此提供纯 Node.js 实现
+ * 用 App Private Key 生成 JWT
+ * 优先使用 jsonwebtoken 库，不可用时降级到 Node.js crypto 实现
  */
 function generateJWT() {
   const privateKey = process.env.GHAPP_PRIVATE_KEY;
@@ -27,42 +31,40 @@ function generateJWT() {
     throw new Error('GHAPP_APP_ID 和 GHAPP_PRIVATE_KEY 环境变量必须设置');
   }
 
-  // 尝试使用 jsonwebtoken 库
-  try {
-    const jwt = require('jsonwebtoken');
+  if (jwtLib) {
     const payload = {
       iat: Math.floor(Date.now() / 1000) - 60,
       exp: Math.floor(Date.now() / 1000) + (10 * 60),
       iss: appId
     };
-    return jwt.sign(payload, privateKey, { algorithm: 'RS256' });
-  } catch (e) {
-    // jsonwebtoken 不可用时，使用 Node.js crypto 实现
-    const crypto = require('crypto');
-
-    function base64url(buf) {
-      return buf.toString('base64')
-        .replace(/=/g, '')
-        .replace(/\+/g, '-')
-        .replace(/\//g, '_');
-    }
-
-    const header = base64url(Buffer.from(JSON.stringify({ alg: 'RS256', typ: 'JWT' })));
-    const now = Math.floor(Date.now() / 1000);
-    const payload = base64url(Buffer.from(JSON.stringify({
-      iat: now - 60,
-      exp: now + 600,
-      iss: appId
-    })));
-
-    const sigInput = header + '.' + payload;
-    const sign = crypto.createSign('RSA-SHA256');
-    sign.update(sigInput);
-    sign.end();
-    const signature = base64url(sign.sign(privateKey));
-
-    return sigInput + '.' + signature;
+    return jwtLib.sign(payload, privateKey, { algorithm: 'RS256' });
   }
+
+  // jsonwebtoken 不可用时，使用 Node.js crypto 实现
+  const crypto = require('crypto');
+
+  function base64url(buf) {
+    return buf.toString('base64')
+      .replace(/=/g, '')
+      .replace(/\+/g, '-')
+      .replace(/\//g, '_');
+  }
+
+  const header = base64url(Buffer.from(JSON.stringify({ alg: 'RS256', typ: 'JWT' })));
+  const now = Math.floor(Date.now() / 1000);
+  const payload = base64url(Buffer.from(JSON.stringify({
+    iat: now - 60,
+    exp: now + 600,
+    iss: appId
+  })));
+
+  const sigInput = header + '.' + payload;
+  const sign = crypto.createSign('RSA-SHA256');
+  sign.update(sigInput);
+  sign.end();
+  const signature = base64url(sign.sign(privateKey));
+
+  return sigInput + '.' + signature;
 }
 
 /**
diff --git a/services/zhuyuan-bridge/scripts/execute-instruction.js b/services/zhuyuan-bridge/scripts/execute-instruction.js
index 7e9deda7..13e018b3 100644
--- a/services/zhuyuan-bridge/scripts/execute-instruction.js
+++ b/services/zhuyuan-bridge/scripts/execute-instruction.js
@@ -215,13 +215,17 @@ async function main() {
   try {
     plan = JSON.parse(aiResponse);
   } catch (_) {
-    // 尝试从回复中提取 JSON
-    const jsonMatch = aiResponse.match(/\{[\s\S]*\}/);
+    // 尝试从回复中提取 JSON（非贪婪匹配，找第一个完整 JSON 对象）
+    const jsonMatch = aiResponse.match(/\{[\s\S]*?"actions"[\s\S]*?\}(?=\s*$|\s*\n)/);
     if (jsonMatch) {
       try {
         plan = JSON.parse(jsonMatch[0]);
       } catch (_2) {
-        plan = null;
+        // 降级：找所有 { } 对中最长的合法 JSON
+        const allMatches = aiResponse.match(/\{[^{}]*(?:\{[^{}]*\}[^{}]*)*\}/g) || [];
+        for (const m of allMatches) {
+          try { plan = JSON.parse(m); if (plan.actions) break; } catch (_3) { plan = null; }
+        }
       }
     }
   }