react-performance

This SKILL.md and included code examples are coherent with their stated purpose (React performance education). There are no signs of credential harvesting, exfiltration, dynamic code-evaluation tricks, obfuscation, or malicious network endpoints. Risk is limited to normal supply-chain trust of third-party packages you choose to install (e.g., xlsx, react, web-vitals). Recommend standard package vetting (pinning versions, auditing dependencies) but the skill content itself appears benign.