BetterNether

Features

• Gloomwood groves, mega lava lakes and lumabus vines
• Port testmod GameTest coverage from 26.2 for testing parity
• Wire up the cross-mod compat-test framework
• Add cincinnasite, cincinnasite_diamond, nether_ruby and flaming_ruby spears
• Add proper spawn egg art for naga, jungle skeleton, flying pig, hydrogen jellyfish, and skull
• Giant willow and anchor tree grow from a 2x2 of saplings

Fixes

• CityPiece/DestructionPiece shared a MutableBlockPos cursor across chunks under parallel worldgen (BetterNether#309)
• Custom reagents were accepted by a vanilla brewing stand but never brewed
• Hook mushroom turned any potion into healing, not just awkward
• registerMedicine: bowl-swap read the item count after it was already shrunk to 0
• Repair flaming ruby gear with gloomsculk crystals

Validation

• ✅ BiomesOPlenty + Terralith (BiomesOPlenty-fabric-26.1.2-26.1.2.0.22.jar, Terralith_26.1_v2.6.2_Fabric.jar, GlitchCore-fabric-26.1.2-26.1.2.0.2.jar, TerraBlender-fabric-26.1.2-26.1.2.0.3.jar, lithostitched-1.7.13-fabric-26.1.jar, tested: gametest+worldgen)
• ✅ Incendium alone (Incendium_26.1_v5.4.12.jar, tested: gametest+worldgen)
• ✅ Nullscape alone (Nullscape_26.1.2_v1.2.20.jar, tested: gametest+worldgen)
• ✅ BOP + Terralith + Incendium + Nullscape (BiomesOPlenty-fabric-26.1.2-26.1.2.0.22.jar, Terralith_26.1_v2.6.2_Fabric.jar, GlitchCore-fabric-26.1.2-26.1.2.0.2.jar, TerraBlender-fabric-26.1.2-26.1.2.0.3.jar, lithostitched-1.7.13-fabric-26.1.jar, Incendium_26.1_v5.4.12.jar, Nullscape_26.1.2_v1.2.20.jar, tested: gametest+worldgen)