It's been almost a year since the first "Snapshot Note" series! Anyway here's the 23w03a stuff info.
Fabric Loader 0.14.13 should be used for this version.
Fabric API 0.72.1 is released for this version. Biome API received 1 breaking change; setPrecipitation
method in BiomeModificationContext.WeatherContext
now takes a boolean.
Multiple S2C packets can now be bundled into a single packet, so that they are processed in the same client tick. The bundled packets are still sent separately, but is re-bundled in the client.