Kumir KidsRules
/kids is reserved, not a username
kumir://kids and /kids open the Kids catalog. They are not parsed as a star username.
FameoHref / NotificationDestination map /kids to the Kids preset. Universal Links do the same when Apple Team ID and Play fingerprints are configured.
Until those host secrets exist, well-known association files stay empty on purpose — never invent Team ID or SHA-256 certs.