None of these are needed and only make it easier for software to handle sticker pack fonts.
We use a single meta tag: StkF.
If defined with any value beginning with disambiguator "!FRBSTICKERSPEC", marks the font as a sticker pack font. After the disambiguator, the value is a JSON object. It includes:
- "version" string : "v0" # not yet finalized
- "authors" []Author : sticker fonts are likely to contain art by multiple artists. This is an array of Author objects.