I need a lightweight WeChat plug-in that quietly monitors chats and opens red envelopes the instant they appear, but only when the amount falls inside ranges that I pre-set. Right now the key range is 0.01 – 10 RMB, yet the code should let me edit or add further tiers later without digging through the source. Core workflow • Hook into WeChat’s notification or accessibility events, detect the 红包 prompt, and trigger the grab action automatically. • Read the amount as soon as it is revealed; if it matches my stored thresholds the envelope stays open and is claimed, otherwise it should dismiss or ignore it. • Include a simple interface—config file, on-screen toggle, or mini settings page—where I can update those amount ranges at will. Technical notes – Android environment is preferred; root-free implementation is ideal, but I’m open to proven alternatives. – Stability is vital: the plug-in must survive WeChat updates, background process kills, and common battery-saving restrictions. – Keep resource use minimal so the user experience remains unaffected. – Clean, well-commented code is required so I can maintain or extend it myself later. Delivery • Compiled APK or module ready to sideload. • Full source code with build instructions. • Brief README covering setup, permissions needed, and how to modify amount ranges. If you have past work with WeChat automation, AccessibilityService, or similar envelope-snatching tools, feel free to mention it—speed and reliability matter most to me.