Astro Performance

Purpose

Make Astro sites fast: understand where the bytes and time go, apply the built-in levers (static rendering, islands, assets, caching), and verify improvements by measurement.

When to Use

Activate when the task involves:

• slow pages or poor Core Web Vitals (LCP, INP, CLS)
• reducing JS/HTML payloads or hydration cost
• image/font loading optimization
• caching on-demand content
• pre-launch performance verification

When Not to Use

Do not use this skill for: