This version introduces many new features including:

• Support for Minecraft 1.21.4
• Allay platform support
• Minestom platform support
• Improvements to the CLI generator
• Various other changes, optimizations, and bug fixes

Config pack development changes:

• Platform Minecraft Biome Config:
  • Both Fabric and Bukkit's Minecraft Biome Config have been cleaned up and Bukkit now supports the full range of options
• Noise addon changes:
  • Both FBM and the basic ArithmeticSampler samplers now implement the DerivativeNoiseSampler API
  • You can now turn off salting the noise lookup of the Cellular sampler with the new salt-lookup parameter
  • New LINEAR_MAP normalizer

Paralithic changes:

• Adds support for Paralithic let expressions. Let expressions enable the ability to bind names to expressions within the context of another expression, e.g.

5 + let
  a := 3.5,
  b := a^2, // Optional trailing comma
in a * b * (let d := sqrt(x) in cos(d))

• As the introduction of let expressions may break config packs and the noise predicate addon (which uses the in invocation variable reserved as a keyword in let expressions), this must explicitly be enabled in pack.yml via the following:

expressions:
  options:
    enable-let-expressions: true

• The noise predicate addon will use input instead of in if let expressions are enabled, which currently affects only the EXPRESSION_NORMALIZER sampler