Live demo — two tabs, one flag flip
Left frame is the Filament admin. Right frame is a sample product UI reading the flag through the React adapter. Flip the flag on the left; the right side updates over SSE in under 200ms on broadband. Open your DevTools network panel to watch the event arrive.
Both frames are authenticated with the same per-visitor sandbox workspace key. Sandbox flag changes are isolated to your session and auto-purge after 24 hours.
AdminOpen in new tab ↗
Sign in with the per-visitor sandbox credentials shown on first visit, then toggle the example flag.
Sample productOpen in new tab ↗
A small React app calling useBool('new-checkout-flow'). It listens to the SSE stream and re-renders only the bound component.