This document discusses recent changes and improvements made to the JSON and JSON::PP Perl modules, including fixing various issues, adding better and faster number detection, incremental parsing, and UTF-16/32 support in an experimental capacity. It also notes that specifying PERL_JSON_BACKEND=Cpanel::JSON::XS should now work properly and that a few incompatible changes may have been introduced between JSON::PP and Cpanel::JSON::XS.