Added in Java Edition 19w36a but got included in 1.14.4 also. server_mappings: The obfuscation maps for this server version.Repeats the structure of the client download information. server: The server download information.client_mappings: The obfuscation maps for this client version.client: The client.jar download information.This tag tells the launcher whether it should urge the user to be careful since this version is older and might not support the latest player safety features. complianceLevel: Its value is 1 for all recent versions of the game (1.16.4 and above) or 0 for all others.url: The URL that the game should visit to download the assets.totalSize: The total size of the version.arch: Appears only in the fourth appearance of the compound tag.version: Appears only in the third appearance of the compound tag.Does not appear in the fourth appearance. name: Its value is 'osx' for the first appearance of the compound tag and 'windows' for the second and third.jvm: Contains JVM arguments, such as information about memory allocation, garbage collector selection, or environmental variables.value: An argument or a list of arguments that is added when the condition is matched.has_custom_resolution: Appears only in the second appearance of the compound tag.is_demo_user: Appears only in the first appearance of the compound tag.features: Includes a set of features that can be checked.game: Contains arguments supplied to the game, such as information about the username and the version.

Minecraft indev jar and json