Use when auditing slow page loads, heavy assets, or rendering delays related to Optimize Google Tag Manager implementation. Verify the actual bottleneck in DevT
复制下面这句话，粘贴给 Claude Code、Codex、Cursor 等 AI 编程工具，它会读取安装说明并在你确认后完成安装。
请阅读 https://ai.atlankj.com/install/asset/gh-gtm-present-385785628b76 ，按照其中的说明把「gtm-present」安装到你（当前 AI 工具）中。执行前先告诉我将运行的命令和写入的位置，等我确认。
查看 AI 将读取的安装说明正在读取 GitHub 原文…
内容来自 GitHub 原始文件，由原作者维护。在 GitHub 查看
An unoptimized GTM setup can lead to significant main-thread blocking and increased page weight, slowing down the overall user experience.
<head> but audit its impactVerify that GTM is implemented correctly and evaluate its impact on page performance using Lighthouse.
Clean up unused tags, use asynchronous loading, and consider moving to a server-side implementation.
Explain how GTM affects performance and how to balance tracking needs with speed.
Review the routes, assets, and loading behavior that affect Optimize Google Tag Manager implementation. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/performance/gtm-present