This tab serves from its own did:key host as soon as it loads, signed in or not: the fedproxy ingress forwards each request here, and the handler below answers it. Sign in to serve a domain you registered through Marque too.
AssemblyScript, compiled in a worker and run sandboxed (no imports, 64 MiB, 5 s) once per request. Apply swaps it in without restarting the ingress.