ICCery-CPU/.grok/skills/og/references/placeholder-card.md

The placeholder og.grok.me card (plain utility apps)

An app with no public/og.jpg unfurls with the hosted placeholder:

https://og.grok.me/v1/card.png?host={VITE_PUBLIC_HOSTNAME}&title={APP_NAME}

The injector builds that URL — do not paste it into __root.tsx.

• Optional theme colour: set "color": "FF4D2E" in src/lib/og/site.json (6-digit hex, # optional). The injector appends &color= on the placeholder URL; a themed URL written into __root.tsx is stripped. Custom cards ignore color.
• On rename, update APP_NAME (tab title) and site.json title (share card).

Live preview emits the same tags (the preview X-Forwarded-Host is a valid image host). On publish the request Host is enough — do not write a .env for it. Card pixels and site.json reach the unfurl on the next deploy (identity is baked at vite build).