Search engines and social crawlers previously saw an empty page: the
playground shipped a bare <div id="root"> with no description, canonical,
or Open Graph tags — so shared links (the playground's own core feature)
rendered without a preview card.
- Add meta description, canonical URL, and Open Graph / Twitter cards
with a generated 1200x630 preview image
- Ship static fallback content inside #root, replaced by React on mount,
so crawlers and card bots (which never run JS) read real content
- Promote the app title to a proper <h1>
- Register /playground/ in the sitemap during deploy
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
MinJae Kwon