Site check

An animated page can look perfect in the one browser tab it was built in and fail everywhere else: a blank canvas in Safari, a crop on phones, a seam in a scroll film, a 40 ms frame on a laptop. This skill looks at the page the way visitors will, in several real browsers at several sizes, and reports what broke with pictures.

Tool

scripts/check.py drives headless Chromium (on the real GPU) and WebKit through Playwright.

python3 scripts/check.py http://127.0.0.1:8000/ --out shots \
  --widths 1440,768,390 --browser both \
  --query "view=front" "view=aerial&light=night" \
  --scroll-steps 6 --ready "window.__ready === true"