All my life I've been searching for this thing. I thought my only choice was either to include the schema in the message (JSON, CBOR, MessagePack) or use bloate

All my life I've been searching for this thing. I thought my only choice was either to include the schema in the message (JSON, CBOR, MessagePack) or use bloated code-generation tools made by Google people who don't care about simplicity and ease-of-use (Protobuf). Apparently I was wrong and finally someone invented the Holy Grail of structured data encoding.