Its here: https://authzed.com/docs/spicedb/concepts/schema As far as I understand this is only needed for "Serverless" https://cdn.discordapp.com/attachments/844600078948630559/1274005427729993728/image.png?ex=66c0ad83&is=66bf5c03&hm=3c92730d023c2927d90130de1e11eb99b58c68cede580eae418908350acf2c17&