Codecs such as Base64CodecExtensionMethods.groovy were moved out of grails-codecs into a new package called grails-codecs-core. How are these default groovy extensions loaded? Previously these would be loaded through the gsp plugin -> grails-codecs dependency. In latest Grails 7, these appear not to be loaded any more so calls to x.encodeAsBase64 / x.encodeAsMD5() no longer work. Is this a bug / or a breaking change that is not documented? grails-codecs-core is not published in maven either?

This is a bug, can you open a ticket? I will take care of this one.