From https://github.com/snarfed/bridgy-fed/issues/447#issuecomment-3645105240 : > Damn. I'd planned to use our usual domain-style handle as the Farcaster username (fname), but evidently fnames can only be 15 chars, no periods. Hrm. https://github.com/farcasterxyz/protocol/blob/main/docs%2FSPECIFICATION.md#user-content-name-server