2-json-codec.md

optionId	scastieLink	codeTitle	description
json-codec	https://scastie.scala-lang.org/jzYU3JWJTZW6731MigOqlA	Encode and decode custom data types to JSON	The pluggable derivation system gives custom types new capabilities.

case class Pet(
  name: String,
  kind: String
) derives Codec // enable coding Pet to and from text

val coco = Pet(name = "Coco", kind = "Cat")

val message = writeJson(coco)
//  ^^^^^^^ contains the text: {"name":"Coco","kind":"Cat"}

readJson[Pet](message) // convert message back to a Pet!