fix: avoid OpenGL driver loading in unit tests

.gitlab-ci.yml

@@ -157,9 +157,6 @@ build:
     paths:
       - neoforge/build/libs
       - fabric/build/libs
-    exclude:
-      - neoforge/build/libs/*-dev-shadow.jar
-      - fabric/build/libs/*-dev-shadow.jar
 
 publish:
   stage: deploy

CHANGELOG.md

@@ -1,42 +1,45 @@
 # Changelog
-## [1.8.5 (MONTH xth, 2026)](#1-8-5)
+## [1.8.2 (MONTH xth, 2026)](#1-8-2)
 
 ### Additions
-- You can now drag to select multiple Pokémon inside the PC menu.
+- The following items can now be placed on the ground as blocks:
+  - King's Rock, Galarica Cuff, Unremarkable Teacup, Masterpiece Teacup, Chipped Pot, Cracked Pot, Sachet, Metal Powder, Quick Powder, Bright Powder, Icy Rock, Heat Rock, Smooth Rock, Damp Rock, Destiny Knot, Luminous Moss, Never-Melt Ice, Wide Lens, Scope Lens, and Zoom Lens.
+  - Iron Ball, Metal Coat, Throat Spray, HP Up, Protein, Iron, Carbos, Calcium, Zinc, PP Up, PP Max, Upgrade, Dubious Disc, and Loaded Dice.
+- The following items can now be placed on various surfaces:
+  - Galarica Wreath, Magnet, Flame Orb, Life Orb, Toxic Orb, Light Ball, and Smoke Ball.
+- The following items can now be placed as blocks, and have additional functionality:
+  - Ring Target, Metronome, and Eject Button.
+- The following items can now be worn by Players and Pokémon:
+  - Galarica Wreath, Cleanse Tag, Spell Tag, Sharp Beak, Covert Cloak, Shell Helmet, and Never-Melt Ice.
+- Wearable items can now be equipped by a player by holding it and right-clicking (or rebound use/interact)
+  - Wearable items that can be placed down are exempt from this behaviour.
+
+### New rideable Pokémon
 
 ### Pokémon Added
-#### Generation 4
 
-#### Generation 5
-
-#### Generation 6
-
-#### Generation 7
-
-#### Generation 8
-
-#### Generation 9
+#### Regional Forms
 
 ### Model updates for the following Pokémon
 
 ### Animation updates for the following Pokémon
-- Added the `healersSetSpawn` gamerule. When enabled, using a healing machine will set your spawnpoint.
+
+#### Added sounds to the following moves
 
 ### Changes
-- Amethyst now grows from Typegem core blocks like typegems do
 
 ### Fixes
-- Fixed Ponigiri food values for AppleSkin integration
-- Fixed errors emitted by typos in Parched Peat bog structure files
+- Correctly grants "They're Minerals!" advancement when planting a type gem
+- Type Gem Blocks now have advancements to give you the recipe in the recipe book (the data for the advancements were inside the recipes somehow??)
+- Corrected the TM Recipes for Charge Beam and Payday
 
 ### Developer
 
 ### Molang & Datapacks
-- `q.is_standing_on_blocks` now properly checks for non-full blocks like slabs, Mud or Soul Sand
-- Added Molang functions to play footstep sounds based on the corresponding surface. These are intended to be used by Pokémon animations.
-- Pokémon can now have their Minecraft footstep sounds silenced in their poser. This doesn't affect emitting game events.
 
 ### Particles
 
+#### New Move Animations
+
 ### Localization
-- Updated translations for:
+- Updated translations for:

alpha-pokemon-todo

@@ -0,0 +1,9 @@
+- Some kind of particle effect for them? they're meant to have glowing eyes, so maybe some red particles on the eye locator
+--- global posers? stacked posers?
+--- red texture seems to be what some people wanted.
+
+/- shoulder mounts part of it
+- omni boost
+- roar when player comes within reach, adjust levels
+
+- Riding settings to control what the min scale is for a pokemon to be ridable.

build.gradle.kts

@@ -1,6 +1,3 @@
-import utilities.gitBranch
-import utilities.gitShortCommit
-
 plugins {
     id("cobblemon.root-conventions")
 }
@@ -9,6 +6,6 @@ version = "${project.property("mod_version")}+${project.property("mc_version")}"
 
 val isSnapshot = project.property("snapshot")?.equals("true") == true
 if (isSnapshot) {
-    val fixedBranchName = gitBranch().substringAfter("/")
-    version = "$version-${fixedBranchName}-${gitShortCommit()}"
+    val fixedBranchName = versioning.info.branch.substringAfter("/")
+    version = "$version-${fixedBranchName}-${versioning.info.build}"
 }

changelogs/CHANGELOG-1.8.0.md

@@ -36,7 +36,6 @@
 - Added `cobblemon:catch_alpha_pokemon` advancement trigger and `totalAlphaCaptureCount` stat for captured Alpha Pokémon.
 
 ### New rideable Pokémon
-- Pidgeot
 - Crobat
 - Skarmory
 - Milotic
@@ -107,9 +106,7 @@
 - Avalugg (Hisuian Form)
 
 ### Model updates for the following Pokémon
-- Pidgey
-- Pidgeotto
-- Pidgeot
+
 - Sandshrew
 - Sandslash
 - Nidoking

changelogs/CHANGELOG-1.8.2.md

@@ -1,211 +0,0 @@
-# Changelog
-## [1.8.2 (October 11th, 2026)](#1-8-2)
-
-### Additions
-- The following items can now be placed on the ground as blocks:
-  - King's Rock, Galarica Cuff, Unremarkable Teacup, Masterpiece Teacup, Chipped Pot, Cracked Pot, Sachet, Metal Powder, Quick Powder, Bright Powder, Soft Sand, Electirizer, Magmarizer, Icy Rock, Heat Rock, Smooth Rock, Damp Rock, Destiny Knot, Luminous Moss, Never-Melt Ice, Wide Lens, Scope Lens, and Zoom Lens.
-  - I wasn't finished. Iron Ball, Metal Coat, Throat Spray, Terrain Extender, Medicinal Brew, Moomoo Milk, HP Up, Protein, Iron, Carbos, Calcium, Zinc, PP Up, PP Max, Upgrade, Dubious Disc, and Loaded Dice.
-- The following items can now be placed on various surfaces:
-  - Galarica Wreath, Magnet, Flame Orb, Life Orb, Toxic Orb, Light Ball, and Smoke Ball.
-- The following items can now be placed as blocks and have additional functionality:
-  - Ring Target, Metronome, and Eject Button.
-- The following items can now be worn by Players and Pokémon:
-  - Galarica Wreath, Cleanse Tag, Spell Tag, Sharp Beak, Covert Cloak, Shell Helmet, and Never-Melt Ice.
-- Wearable items can now be equipped by a player by holding it and right-clicking (or whatever you've rebound use/interact to).
-  - Wearable items that can be placed down are exempt from this behaviour.
-- Mint Leaves can now be placed on the ground as Leaf Litter, or in Flower Pots.
-- The recall animation now renders the ball in hand with the player's arm raised.
-- Added Oricorio Flowers.
-- Added Terrain Plants, four plants grown from Electric, Grassy, Misty, and Psychic Seeds, which glow under specific environmental conditions and can be farmed for more of their seeds.
-- Berries can now be placed in Flower Pots.
-- The evolution tree for a Pokémon can now be viewed in the Pokédex, showing the Pokémon's full family line and what's needed to evolve into each stage.
-- Added custom sounds to a bunch of items that can be placed as blocks: liquid bottles, pill bottles, powders, and dice.
-- Added paper as a new cosmetic item for Pikachu.
-- Burmy changes its cloak after a battle it took part in, based on the biome.
-  - Trash Cloak in the Deep Dark, Nether and End.
-  - Plant Cloak in lush biomes such as forests, jungles, plains and swamps.
-  - Sandy Cloak in sandy biomes, beaches and caves.
-
-### Pokémon Added
-#### Generation 4
-- Snover
-- Abomasnow
-- Burmy
-- Wormadam
-- Mothim
-
-#### Generation 5
-- Tympole
-- Palpitoad
-- Seismitoad
-
-#### Generation 6
-- Helioptile
-- Heliolisk
-
-#### Generation 7
-- Grubbin
-- Charjabug
-- Vikavolt
-- Minior
-
-#### Generation 8
-- Eternatus
-
-#### Generation 9
-- Greavard
-- Houndstone
-
-### Model updates for the following Pokémon
-- Sudowoodo
-- Spheal
-- Cacnea
-- Cacturne
-- Binacle
-- Barbaracle
-- Glimmet
-- Glimmora
-- Deerling
-- Sawsbuck (All forms)
-- Absol
-- Poliwag
-- Politoed
-- Ekans
-- Oddish
-- Gloom
-- Vileplume
-- Bellossom
-- Shroomish
-- Chespin
-- Quilladin
-- Chesnaught
-- Fennekin
-- Braixen
-- Delphox
-- Froakie
-- Frogadier
-- Greninja
-- Shinx
-- Luxio
-- Luxray
-- Slakoth
-- Riolu
-- Lucario
-- Corsola
-- Mime Jr.
-
-### Animation updates for the following Pokémon
-- Treecko (New Shoulder Mount!)
-- Bonsly (New Shoulder Mount!)
-- Sudowoodo
-- Cacnea
-- Cacturne
-- Ekans
-- Arbok
-- Oddish
-- Gloom
-- Vileplume
-- Bellossom
-- Pichu
-- Pikachu
-- Raichu (+ Alolan)
-- Greninja
-- Slakoth
-
-### Changes
-- Slowed the speed of Type Gem growth, and revamped their generation to grow in a more crystal-like shape.
-- Terrain Seeds can now be planted.
-- Terrain Seeds are now consumed during PvP and NPC battles.
-- Glow Item Frames can be crafted using Bright Powder as an alternative to Glow Ink Sacs.
-- Bright Powder can be used on Signs and Hanging Signs to make text glow, as an alternative to Glow Ink Sacs.
-- Updated various recipes to display in Recipe Groups within the Recipe Book.
-- Updated most recipes to display more logically and consistently within the Recipe Book's categories.
-- Updated the following recipes
-  - Never-Melt Ice, Focus Sash, Blunder Policy, Weakness Policy, Blank TM.
-- Made ride rotations less jittery in multiplayer.
-- Changes Disc Shelf TMs to use textures instead of tinting and overlays to line up with item display.
-- Blank TM can now be inserted into the Disc Shelf.
-- Added a TM creative tab.
-- Made regional and Vivillon split-evo locations mutually exclusive.
-- Vivillon's patterns are now viewable as forms with form names and unique Pokédex entries displayed.
-- Item evolutions now unlock **all** locked evolutions whose requirements are met instead of stopping after the first.
-  - Exceptions being "forced" evolutions which stop after the first one.
-- Removed Mega Drain as a TM.
-- PokeSnacks (and other area spawns) will now start the vertical offset checking from the center rather than base coordinate
-  - This will help PokeSnacks to work inside caves or tighter spaces better.
-
-### Fixes
-- Type Gem blocks now properly generate clusters off of the block.
-- Correctly grant "They're Minerals!" advancement when planting a Type Gem.
-- Shoulder mounted Pokémon now follow player body animations, improving their positioning with custom player animations and default actions.
-- Shoulder mounted Pokémon now sit slightly higher with chest armor equipped for better alignment, with a configurable blacklist.
-- Type Gem Blocks now have advancements to give you the recipe in the recipe book (the data for the advancements were inside the recipes somehow??).
-  - Some other recipes without advancements have also been corrected.
-- Corrected the TM Recipes for Charge Beam and Payday.
-- Starter Screen Categories will no longer stop rendering if they are bigger than the viewport and you are not viewing the top or bottom edges.
-- The Random Starter option no longer runs off into other categories or becomes unaccessible due to scroll limits if it causes a new row.
-- Mochi and Feathers no longer drop glass bottles on use.
-- Fixed a rare set of concurrency bugs related to reloading packs on NeoForge; fixes a ModernFix compatibility issue.
-- Removed unnecessary conditions for Mimikyu's standing pose. Hopefully fixes the rare instance of it using its shoulder animations during battle in multiplayer scenarios.
-- Fixed Rockruff line not blinking.
-- Fixed Flygon sometimes using its running animation instead of walking.
-- Fixed Bramblin always sleeping outside of battle.
-- Fixed Dragonair using its battle idle as a normal idle.
-- Fixed Lycanroc's head movement.
-- Added head movement to Archaludon.
-- Fixed Duraludon line not having any sleep animations.
-- Fixed Diglett line not having their faint animations.
-- Fixed Kingambit moving its legs while walking.
-- Fixed Alolan Diglett's cry not playing.
-- Fixed shiny alpha Snorlax using the non-shiny texture.
-- Fixed Crabominable's head breaking when looking around.
-- Fixed Shiny Dipplin and Hydrapple's textures.
-- Various structure fixes.
-- Fixed shiny Pokémon under certain circumstances forgetting taught TMs.
-- Fixed certain Pokémon sounds sometimes being doubled when played at specific times in their animations.
-- Fixed ball capture beam origin coming from behind the ball.
-- Fixed Safari Ball catch rate outside of battle.
-- Fixed alpha eye (and other) particles not respecting the client particle density setting in video options.
-- Fixed the TM Machine UI not closing when player is moving away from it.
-- Moved the config category for alpha/shiny chance config fields for fossil machine and honey log slathering to Spawning.
-- Fixed crashes for addon species with non-Cobblemon namespaces in evolution, fishing bait, and Pokédex lookups.
-- Bees will now grow Apricorns and the Galarica Nut Bush, which were in the bee growables tag but never handled, and correctly spend their nectar when they do.
-- Saccharine Leaves can now be bone mealed.
-- Fixed equipping a stack of wearable items instead of one item of a stack.
-- Fixed TM stack consumption in TM Machine screen when a player teaches a move to a Pokémon.
-- Fixed every Miltank giving mushroom stew, not only mushroom variants.
-- Medicinal Leeks can now be eaten when they aren't being planted, matching their food properties.
-- Sweeping attacks no longer set owned Pokémon on fire (e.g. with Fire Aspect) or knock them back. Friendly Fire is now off.
-- Fixed Pokémon not losing their previous form's signature moves when changing forms (e.g. Rotom keeping Overheat after leaving its Heat form).
-- Form-specific moves gained from a form change are now only granted if the Pokémon is high enough level to learn them, and no longer create duplicates in benched moves.
-- Spinda now learns Teeter Dance at level 32 instead of via TM.
-- Fixed Oricorio Pa'u form description in the Pokédex.
-- Fixed PC playing sound on close when opened via command.
-
-### Developer
-- Evolution requirements can now set `pokedexIcon` and `pokedexTooltip` directly in their JSON to control how they're shown on the Pokédex's evolution tree, for example:
-  ```json
-  {
-    "variant": "attack_defence_ratio",
-    "pokedexIcon": "minecraft:diamond_sword",
-    "pokedexTooltip": "cobblemon.ui.pokedex.requirement.attack_defence_ratio.tooltip"
-  }
-  ```
-- Fixed the wrong order of operations in the code flow prior to the `FOSSIL_REVIVED` event causing Pokémon to appear without the entity link.
-- Fixed TestPartySlot command not correctly comparing the provided spec with the target Pokémon.
-
-### Molang & Datapacks
-- A new `negate` variant for evolution requirements has been added, which will negate (invert) the provided inner condition.
-- Added Molang functions for individual Pokédex ids, wherein a subdex is passed in as a string to `dex_caught_count` etc.
-- Added a `battle_ended` callback, backed by the new `BATTLE_ENDED` event, which fires whenever a battle ends for any reason, alongside a multitude of flags not previously covered by `BATTLE_VICTORY`.
-- Added `battle_pokemon` to battle actor structs and `has_faced_opponents` to battle Pokémon structs.
-- Added the `cobblemon:form_change/bagworm_cloak/plant_cloak`, `sandy_cloak` and `trash_cloak` biome tags, which control Burmy's cloak after battle.
-
-### Localization
-- Updated translations for:
-  - Brazilian Portuguese
-  - Canadian French
-  - Japanese
-  - Korean
-  - Russian
-  - Ukrainian

changelogs/CHANGELOG-1.8.3.md

@@ -1,107 +0,0 @@
-# Changelog
-## [1.8.3 (October 25th, 2026)](#1-8-3)
-
-### Additions
-- Added compatability with AppleSkin.
-
-### New Rideable Pokémon
-- Vikavolt
-- Fearow
-
-### Particles
-## New Move Animations
-- Water Shuriken
-
-### Cries added/updated for the following Pokémon
-- Hoppip
-- Skiploom
-- Jumpluff
-- Houndour
-- Houndoom
-- Wurmple
-- Silcoon
-- Beautifly
-- Cascoon
-- Dustox
-- Surskit
-- Masquerain
-- Torkoal
-- Starly
-- Staravia
-- Staraptor
-- Combee
-- Vespiquen
-- Dusknoir
-- Helioptile
-- Heliolisk
-- Grubbin
-- Charjabug
-- Vikavolt
-- Applin (updated)
-- Flapple (updated)
-- Appletun
-- Runerigus
-- Dipplin
-
-### Animation updates for the following Pokémon
-- Vikavolt
-- Magby
-- Magmar
-- Ninetales (+ Alolan)
-- Spearow
-- Fearow
-- Squawkabilly
-- Mudkip
-- Marshtomp
-- Swampert
-
-### Changes
-- Changed the Misc icon in the Campfire Pot Recipe Book to Health Candy.
-- Moved EXP Candies from the Medicine recipe book category to the Misc category.
-- Removed Dynamic Lights data from the Magmarizer item for consistency with the block.
-- Added `doPokemonPredation` game rule, which controls aggressiveness of Pokémon with the `hate_entity` brain task defined.
-- Added `predation_chance` server config value, which controls the possibility of attacking the hated entity found in `hate_entity` brain tasks.
-- Prehistoric Eroded Pillar generates slightly more frequently.
-- Togekiss was changed from a jet-style mount to bird-style.
-
-### Fixes
-- Fixed datapacks with item interaction evolutions that don't specify an item crashing the world on load.
-- Fixed the Pokédex evolution tree crashing when a datapack's dex entry is missing an evolution's form.
-- Fixed the Pokédex evolution tree crashing with a stack overflow on evolutions that loop back on themselves.
-- Fixed the Pokédex evolution tree crashing when looking at a dex that is not part of the "National Dex" aggregate.
-- Fixed some display names in the Pokédex evolution tree having unintended font colours.
-- Fixed evolution trees not building properly when a Pokémon has several Pokédex entries for different regions.
-- Fixed form-changing evolutions sometimes resolving to the source form in the Pokédex evolution tree.
-- Broken datapack evolutions are now logged and skipped in the Pokédex evolution tree instead of crashing.
-- Fixed the `alpha` property having no tab completion in commands such as `/pokespawn`, `/pokegive` and `/pokeedit`, and added the missing `dmax_level`, `gmax_factor` and `tradable` aliases to tab completion.
-- Fixed friendship booster items not being recognised as such.
-- Fixed conflicts with other mods that would make use of recipe books in certain ways (Farmer's Delight Cooking Pot).
-- Fixed Pokémon battles stalling when a sidemod cancels the `THROWN_POKEBALL_HIT` hit event.
-- Fixed choice feature tab completion in `spawnpokemon/pokegive/pokeedit` commands.
-- Fixed MoLang that's targeting players intermittedly failing when they have died, requiring them to relog.
-- Fixed a NeoForge bug where none of the Cobblemon plants/berries could be placed into pots.
-- Fixed party overlay not hiding when the player opens the Pokédex scanner.
-- Fixed `hate_entity` task focusing on its own entity, therefore enabling deadly warfare between Zangoose and Seviper.
-- Prehistoric Frozen Pond, Prehistoric Frozen Spike, and Prehistoric Lush Den now actually generate (oops).
-- Fixed Frogadier floating in its `battle_idle` animation.
-- Fixed absence or incorrect mergers in spawning conditions, causing the max height/depth of conditions to use the min value instead.
-- Added stricter riding checks on server side to prevent possible packet forgery when a player tries to ride Pokémon.
-- Fixed Pokémon cries and animation sounds played from GUIs, such as the starter selection screen and the Pokédex, being tied to the Master volume slider instead of Friendly Creatures.
-- Fixed Archeops T-posing during its `air_cry` animation.
-
-### Developer
-- Bumped NeoForge to `21.1.195` to get access to MixinExtras `0.5` and the expressions annotation.
-- New Platform Event `PLAYER_RESPAWN` which is fired when a player respawns (either through death or returning from the end).
-- Platform Events `SERVER_PLAYER_TICK_PRE` and `SERVER_PLAYER_TICK_POST` no longer fire when the player is dead.
-  - It is now tied much closer to the actual entity rather than the player or their connection.
-
-### Molang & Datapacks
-- Fixed `q.pokemon.nature` returning class instance instead of proper string value (`cobblemon:adamant`).
-- Fixed `q.entity.is_looking_at` result being always `1` for whatever entity passed as the target parameter.
-- Added hate chance optional parameter to `hate_entity` task. `1.0` will make an entity always attack the target.
-
-### Localization
-- Updated translations for:
-  - Russian
-  - Japanese
-  - Brazilian Portuguese

changelogs/CHANGELOG-1.8.4.md

@@ -1,25 +0,0 @@
-# Changelog
-## [1.8.4 (October 27th, 2026)](#1-8-4)
-
-### Changes
-- The Froakie line now blinks. The world will never be the same.
-
-### Fixes
-- Fixed heaps of spawns not working. This was caused by us missing something before release. RIP.
-- Fixed a crash caused by Fearow blinking while you're riding one. Makes sense to me.
-- Fixed Minior's "Shields Down" ability being very broken.
-- Fixed Dusclops using Squirtle's cry sound (lol).
-- Fixed blank Cooking Pot recipe book entries and missing tabs on Fabric.
-- Fixed a hitbox issue with placeable Orb held items attached to a ceiling.
-- Fixed something sneaky. I'll tell you about it later.
-
-### Molang & Datapacks
-- Added `q.target_fainted` function to move action effects that checks if any opponents fainted from the move.
-
-### Particles
-- Updated Water Shuriken effect to be timed better when the opponent faints.
-
-### Localization
-- Updated translations for:
-  - Korean
-  - Simplified Chinese

common/build.gradle.kts

@@ -1,8 +1,9 @@
 
 import utilities.isSnapshot
 import utilities.version
-import utilities.gitBranch
-import utilities.gitCommit
+import java.time.OffsetDateTime
+import java.time.ZoneOffset
+import java.time.format.DateTimeFormatter
 
 /*
  *
@@ -65,20 +66,14 @@ dependencies {
 
 tasks.withType<Test> {
     useJUnitPlatform()
+    // Static GL mocks must not load a graphics driver on headless CI.
+    systemProperty("org.lwjgl.opengl.explicitInit", "true")
     testLogging {
         setEvents(listOf("failed"))
         setExceptionFormat("full")
     }
 }
 
-// Git info lives in its own output dir (not processResources) so a new commit only rewrites this one file.
-val writeGitInfo by tasks.registering(WriteProperties::class) {
-    destinationFile = layout.buildDirectory.file("generated/gitInfo/cobblemon-git.properties")
-    property("commit", gitCommit())
-    property("branch", gitBranch())
-}
-sourceSets.main { output.dir(mapOf("builtBy" to writeGitInfo), layout.buildDirectory.dir("generated/gitInfo")) }
-
 tasks.processResources {
     exclude("data/**/README.md")
 }
@@ -105,13 +100,11 @@ sourceSets {
                 property("modid", "cobblemon")
                 property("version", project.version())
                 property("isSnapshot", if(rootProject.isSnapshot()) "true" else "false")
+                property("gitCommit", versioning.info.commit)
+                property("branch", versioning.info.branch)
                 System.getProperty("buildNumber")?.let { property("buildNumber", it) }
+                property("timestamp", OffsetDateTime.now(ZoneOffset.UTC).format(DateTimeFormatter.ofPattern("MM/dd/yyyy hh:mm:ss")) + " UTC")
             }
         }
     }
 }
-
-// The platform jars are built from :common:jar, so the remapped common jars are only needed by `publish`
-tasks.assemble {
-    setDependsOn(dependsOn.filterNot { (it as? TaskProvider<*>)?.name in setOf("remapJar", "remapSourcesJar") })
-}

common/src/main/java/com/cobblemon/mod/common/mixin/BeeEntityMixin.java

@@ -8,42 +8,54 @@
 
 package com.cobblemon.mod.common.mixin;
 
-import com.llamalad7.mixinextras.sugar.Local;
+import com.cobblemon.mod.common.block.SaccharineLeafBlock;
 import net.minecraft.core.BlockPos;
-import net.minecraft.server.level.ServerLevel;
-import net.minecraft.world.entity.animal.Bee;
-import net.minecraft.world.level.block.Blocks;
-import net.minecraft.world.level.block.BonemealableBlock;
+import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.state.BlockState;
-import org.spongepowered.asm.mixin.Final;
+import net.minecraft.world.level.block.state.properties.BlockStateProperties;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.ModifyVariable;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
 
 
 @Mixin(targets = "net.minecraft.world.entity.animal.Bee$BeeGrowCropGoal")
 public abstract class BeeEntityMixin {
 
-    @Shadow(aliases = {"this$0", "field_20373"}) @Final private Bee bee;
+    @Unique
+    private BlockState cobblemon$result = null;
+
+    @Inject(method = "tick()V", at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/world/level/block/BonemealableBlock;performBonemeal(Lnet/minecraft/server/level/ServerLevel;Lnet/minecraft/util/RandomSource;Lnet/minecraft/core/BlockPos;Lnet/minecraft/world/level/block/state/BlockState;)V",
+            shift = At.Shift.BY,
+            by = 2
+        ),
+        locals = LocalCapture.CAPTURE_FAILHARD
+    )
+    private void injectCustomGrowth(CallbackInfo ci, int i, BlockPos blockPos, BlockState blockState, Block block) {
+        if (block instanceof SaccharineLeafBlock) {
+
+            int age = blockState.getValue(SaccharineLeafBlock.Companion.getAGE());
+            boolean waterlogged = blockState.getValue(BlockStateProperties.WATERLOGGED);
+
+            if (age < 2 && !waterlogged) {
+                this.cobblemon$result = blockState.setValue(SaccharineLeafBlock.Companion.getAGE(), age + 1);
+            }
+        }
+    }
 
-    // Grows bonemealable blocks vanilla's hardcoded checks miss, returning the state so it handles the rest.
     @ModifyVariable(method = "tick", at = @At(value = "LOAD", ordinal = 0), index = 5)
-    private BlockState cobblemon$growBonemealableBlocks(BlockState grownState, @Local(ordinal = 0) BlockState blockState, @Local BlockPos pos) {
-        if (grownState != null || blockState.is(Blocks.CAVE_VINES) || blockState.is(Blocks.CAVE_VINES_PLANT)) {
-            return grownState;
+    private BlockState applyCustomBlockState(BlockState before) {
+        if(this.cobblemon$result != null && before == null) {
+            BlockState result = this.cobblemon$result;
+            this.cobblemon$result = null;
+            return result;
         }
 
-        if (!(blockState.getBlock() instanceof BonemealableBlock bonemealable)) {
-            return null;
-        }
-
-        ServerLevel level = (ServerLevel) this.bee.level();
-        if (!bonemealable.isValidBonemealTarget(level, pos, blockState)) {
-            return null;
-        }
-
-        bonemealable.performBonemeal(level, this.bee.getRandom(), pos, blockState);
-        return level.getBlockState(pos);
+        return before;
     }
 }

common/src/main/java/com/cobblemon/mod/common/mixin/ChunkStorageMixin.java

@@ -15,7 +15,6 @@ import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
 import com.mojang.serialization.MapCodec;
 import java.util.Optional;
 import java.util.function.Supplier;
-import net.minecraft.SharedConstants;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.nbt.IntTag;
 import net.minecraft.resources.ResourceKey;
@@ -46,24 +45,4 @@ public class ChunkStorageMixin {
         int curVersion = vanillaFixed.contains(VERSION_KEY) ? vanillaFixed.getInt(VERSION_KEY) : 0;
         return DataFixTypes.CHUNK.update(CobblemonSchemas.getDATA_FIXER(), vanillaFixed, curVersion, CobblemonSchemas.DATA_VERSION);
     }
-
-    // Our update on the same MC version still needs its own fixes so run them here in that case.
-    @Inject(
-        method = "upgradeChunkTag(Lnet/minecraft/resources/ResourceKey;Ljava/util/function/Supplier;Lnet/minecraft/nbt/CompoundTag;Ljava/util/Optional;)Lnet/minecraft/nbt/CompoundTag;",
-        at = @At("HEAD"),
-        cancellable = true
-    )
-    private void cobblemon$doChunkFixOnCurrentVersion(
-        ResourceKey<Level> levelKey,
-        Supplier<DimensionDataStorage> storage,
-        CompoundTag chunkData,
-        Optional<ResourceKey<MapCodec<? extends ChunkGenerator>>> chunkGeneratorKey,
-        CallbackInfoReturnable<CompoundTag> cir
-    ) {
-        if (ChunkStorage.getVersion(chunkData) != SharedConstants.getCurrentVersion().getDataVersion().getVersion()) {
-            return;
-        }
-        int curVersion = chunkData.contains(VERSION_KEY) ? chunkData.getInt(VERSION_KEY) : 0;
-        cir.setReturnValue(DataFixTypes.CHUNK.update(CobblemonSchemas.getDATA_FIXER(), chunkData, curVersion, CobblemonSchemas.DATA_VERSION));
-    }
 }

common/src/main/java/com/cobblemon/mod/common/mixin/PlayerMixin.java

@@ -35,16 +35,13 @@ import com.cobblemon.mod.common.util.DataKeys;
 import com.cobblemon.mod.common.world.gamerules.CobblemonGameRules;
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
 import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
-import com.llamalad7.mixinextras.sugar.Local;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.nbt.Tag;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.util.Mth;
 import net.minecraft.world.damagesource.DamageSource;
-import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.EntityDimensions;
 import net.minecraft.world.entity.EntityType;
 import net.minecraft.world.entity.LivingEntity;
@@ -53,7 +50,6 @@ import net.minecraft.world.entity.item.ItemEntity;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.food.FoodProperties;
 import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.enchantment.EnchantmentHelper;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.phys.Vec3;
 import org.jetbrains.annotations.Nullable;
@@ -375,33 +371,4 @@ public abstract class PlayerMixin extends LivingEntity implements ScannableEntit
         this.cobblemon$rideEyePos = rideEyePos;
     }
 
-    /**
-     * Sweeping attacks apply post-attack enchantment effects (e.g. Fire Aspect) to every entity caught
-     * in the sweep, even if the damage itself was blocked. Skip them for Pokémon immune to the attack.
-     */
-    @WrapOperation(
-            method = "attack",
-            at = @At(value = "INVOKE", target = "Lnet/minecraft/world/item/enchantment/EnchantmentHelper;doPostAttackEffects(Lnet/minecraft/server/level/ServerLevel;Lnet/minecraft/world/entity/Entity;Lnet/minecraft/world/damagesource/DamageSource;)V")
-    )
-    private void cobblemon$skipPostAttackEffectsOnImmunePokemon(ServerLevel level, Entity target, DamageSource source, Operation<Void> original) {
-        if (target instanceof PokemonEntity pokemonEntity && pokemonEntity.isInvulnerableTo(source)) {
-            return;
-        }
-        original.call(level, target, source);
-    }
-
-    /**
-     * Sweeping attacks also knock back every entity caught in the sweep regardless of whether it took damage.
-     */
-    @WrapOperation(
-            method = "attack",
-            at = @At(value = "INVOKE", target = "Lnet/minecraft/world/entity/LivingEntity;knockback(DDD)V")
-    )
-    private void cobblemon$skipKnockbackOnImmunePokemon(LivingEntity target, double strength, double x, double z, Operation<Void> original, @Local DamageSource source) {
-        if (target instanceof PokemonEntity pokemonEntity && pokemonEntity.isInvulnerableTo(source)) {
-            return;
-        }
-        original.call(target, strength, x, z);
-    }
-
 }

common/src/main/java/com/cobblemon/mod/common/mixin/ServerPlayerMixin.java

@@ -15,7 +15,6 @@ import com.cobblemon.mod.common.api.riding.RidingStyle;
 import com.cobblemon.mod.common.api.spawning.spawner.PlayerSpawner;
 import com.cobblemon.mod.common.api.spawning.spawner.PlayerSpawnerFactory;
 import com.cobblemon.mod.common.api.stats.CobblemonStats;
-import com.cobblemon.mod.common.block.HealingMachineBlock;
 import com.cobblemon.mod.common.duck.ServerLevelDuck;
 import com.cobblemon.mod.common.entity.pokemon.PokemonEntity;
 import com.cobblemon.mod.common.world.gamerules.CobblemonGameRules;
@@ -23,14 +22,10 @@ import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
 import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
 import com.llamalad7.mixinextras.sugar.Local;
-import net.minecraft.core.BlockPos;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.world.entity.Entity;
-import net.minecraft.world.entity.EntityType;
-import net.minecraft.world.level.block.Block;
-import net.minecraft.world.level.block.state.BlockState;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
@@ -38,9 +33,6 @@ import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
-
-import java.util.Optional;
 
 @Mixin(ServerPlayer.class)
 public abstract class ServerPlayerMixin implements PlayerSpawnerAccessor {
@@ -150,17 +142,4 @@ public abstract class ServerPlayerMixin implements PlayerSpawnerAccessor {
                         ((ServerLevelDuck) this.serverLevel()).cobblemon$getLevelResourceLocation()
                 );
     }
-
-    @Inject(
-            method = "findRespawnAndUseSpawnBlock(Lnet/minecraft/server/level/ServerLevel;Lnet/minecraft/core/BlockPos;FZZ)Ljava/util/Optional;",
-            at = @At(value = "HEAD"),
-            cancellable = true
-    )
-    private static void cobblemon$useHealthStationAsRespawn(ServerLevel level, BlockPos pos, float angle, boolean forced, boolean keepInventory, CallbackInfoReturnable<Optional<ServerPlayer.RespawnPosAngle>> cir) {
-        BlockState state = level.getBlockState(pos);
-        Block block = state.getBlock();
-        if (block instanceof HealingMachineBlock && HealingMachineBlock.Companion.canSetSpawn(level)) {
-            cir.setReturnValue(HealingMachineBlock.Companion.findStandUpPosition(EntityType.PLAYER, level, pos).map((vec3) -> ServerPlayer.RespawnPosAngle.of(vec3, pos)));
-        }
-    }
 }

common/src/main/java/com/cobblemon/mod/common/mixin/client/ClientRecipeBookMixin.java

@@ -16,7 +16,6 @@ import com.cobblemon.mod.common.item.crafting.CookingPotShapelessRecipe;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
-import com.llamalad7.mixinextras.sugar.Local;
 import net.minecraft.client.ClientRecipeBook;
 import net.minecraft.client.RecipeBookCategories;
 import net.minecraft.client.gui.screens.recipebook.RecipeCollection;
@@ -64,12 +63,23 @@ public abstract class ClientRecipeBookMixin {
         }
     }
 
-    @Inject(method = "setupCollections",
-            at = @At(
-                    value = "INVOKE",
-                    target = "Lcom/google/common/collect/ImmutableMap;copyOf(Ljava/util/Map;)Lcom/google/common/collect/ImmutableMap;"
-            ))
-    private void addCustomAggregateCategories(Iterable<RecipeHolder<?>> recipes, RegistryAccess registryAccess, CallbackInfo ci, @Local(ordinal = 1) Map<RecipeBookCategories, List<RecipeCollection>> map2) {
+    @Inject(method = "setupCollections", at = @At("RETURN"))
+    private void addCustomAggregateCategories(Iterable<RecipeHolder<?>> recipes, RegistryAccess registryAccess, CallbackInfo ci) {
+        Map<RecipeBookCategories, List<List<RecipeHolder<?>>>> map = categorizeAndGroupRecipes(recipes);
+        Map<RecipeBookCategories, List<RecipeCollection>> map2 = Maps.newHashMap();
+        ImmutableList.Builder<RecipeCollection> builder = ImmutableList.builder();
+
+        map.forEach((recipeBookCategories, list) -> {
+            List<RecipeCollection> collections = list.stream()
+                    .map(listx -> new RecipeCollection(registryAccess, listx))
+                    .peek(builder::add)
+                    .collect(ImmutableList.toImmutableList());
+            map2.put(recipeBookCategories, collections);
+        });
+        RecipeBookCategories.AGGREGATE_CATEGORIES.forEach((recipeBookCategories, list) -> map2.put(recipeBookCategories, (List) list.stream().flatMap((recipeBookCategoriesx) -> ((List) map2.getOrDefault(recipeBookCategoriesx, ImmutableList.of())).stream()).collect(ImmutableList.toImmutableList())));
         CobblemonRecipeCategories.Companion.getCustomAggregateCategories().forEach((recipeBookCategories, list) -> map2.put(recipeBookCategories, (List) list.stream().flatMap((recipeBookCategoriesx) -> ((List) map2.getOrDefault(recipeBookCategoriesx, ImmutableList.of())).stream()).collect(ImmutableList.toImmutableList())));
+
+        this.collectionsByTab = ImmutableMap.copyOf(map2);
+        this.allCollections = builder.build();
     }
 }

common/src/main/java/com/cobblemon/mod/common/mixin/client/HumanoidModelMixin.java

@@ -10,13 +10,11 @@ package com.cobblemon.mod.common.mixin.client;
 
 import com.cobblemon.mod.common.OrientationControllable;
 import com.cobblemon.mod.common.client.render.player.MountedPlayerRenderer;
-import com.cobblemon.mod.common.client.render.player.RecallArmAnimationTracker;
 import com.cobblemon.mod.common.duck.RidePassenger;
 import com.cobblemon.mod.common.entity.pokemon.PokemonEntity;
 import net.minecraft.client.model.HumanoidModel;
 import net.minecraft.client.model.geom.ModelPart;
 import net.minecraft.client.player.AbstractClientPlayer;
-import net.minecraft.util.Mth;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.LivingEntity;
 import org.spongepowered.asm.mixin.Final;
@@ -98,14 +96,4 @@ public class HumanoidModelMixin {
             MountedPlayerRenderer.INSTANCE.animate((HumanoidModel<AbstractClientPlayer>)(Object)this, pokemonEntity, player, netHeadYaw, headPitch, ageInTicks, limbSwing, limbSwingAmount);
         }
     }
-
-    @Inject(method = "setupAnim*", at = @At("TAIL"))
-    public void cobblemon$poseRecallArm(LivingEntity entity, float limbSwing, float limbSwingAmount, float ageInTicks, float netHeadYaw, float headPitch, CallbackInfo ci) {
-        if (!(entity instanceof AbstractClientPlayer) || entity.getVehicle() instanceof PokemonEntity) return;
-        float raise = RecallArmAnimationTracker.INSTANCE.raiseFactor(entity.getUUID());
-        if (raise <= 0f) return;
-        this.rightArm.xRot = Mth.lerp(raise, this.rightArm.xRot, (float) (-Math.PI / 2.0));
-        this.rightArm.yRot = Mth.lerp(raise, this.rightArm.yRot, 0f);
-        this.rightArm.zRot = Mth.lerp(raise, this.rightArm.zRot, 0f);
-    }
 }

common/src/main/java/com/cobblemon/mod/common/mixin/client/ItemInHandLayerMixin.java

@@ -1,32 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.mixin.client;
-
-import com.cobblemon.mod.common.client.render.player.RecallArmAnimationTracker;
-import com.mojang.blaze3d.vertex.PoseStack;
-import net.minecraft.client.renderer.MultiBufferSource;
-import net.minecraft.client.renderer.entity.layers.ItemInHandLayer;
-import net.minecraft.world.entity.HumanoidArm;
-import net.minecraft.world.entity.LivingEntity;
-import net.minecraft.world.item.ItemDisplayContext;
-import net.minecraft.world.item.ItemStack;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
-
-@Mixin(ItemInHandLayer.class)
-public class ItemInHandLayerMixin {
-    @Inject(method = "renderArmWithItem", at = @At("HEAD"), cancellable = true)
-    private void cobblemon$hideRecallHandItem(LivingEntity entity, ItemStack itemStack, ItemDisplayContext itemDisplayContext, HumanoidArm humanoidArm, PoseStack poseStack, MultiBufferSource multiBufferSource, int light, CallbackInfo ci) {
-        if (humanoidArm == HumanoidArm.RIGHT && RecallArmAnimationTracker.INSTANCE.isRecalling(entity.getUUID())) {
-            ci.cancel();
-        }
-    }
-}

common/src/main/java/com/cobblemon/mod/common/mixin/client/ItemInHandRendererMixin.java

@@ -9,7 +9,6 @@
 package com.cobblemon.mod.common.mixin.client;
 
 import com.cobblemon.mod.common.OrientationControllable;
-import com.cobblemon.mod.common.client.render.player.FirstPersonRecallBallRenderer;
 import com.cobblemon.mod.common.item.PokedexItem;
 import com.mojang.blaze3d.vertex.PoseStack;
 import net.minecraft.client.Minecraft;
@@ -32,9 +31,6 @@ public class ItemInHandRendererMixin {
         if (abstractClientPlayer.isUsingItem() && abstractClientPlayer.getUseItem().getItem() instanceof PokedexItem) {
             ci.cancel();
         }
-        else if (interactionHand == InteractionHand.MAIN_HAND && FirstPersonRecallBallRenderer.INSTANCE.render(poseStack, multiBufferSource, j, f)) {
-            ci.cancel();
-        }
         else if (abstractClientPlayer instanceof OrientationControllable controllable && controllable.getOrientationController().isActive()) {
 
         }

common/src/main/java/com/cobblemon/mod/common/mixin/client/RecipeBookComponentMixin.java

@@ -9,25 +9,55 @@
 package com.cobblemon.mod.common.mixin.client;
 
 import com.cobblemon.mod.common.CobblemonRecipeCategories;
-import com.llamalad7.mixinextras.expression.Definition;
-import com.llamalad7.mixinextras.expression.Expression;
-import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
-import com.llamalad7.mixinextras.sugar.Local;
+import net.minecraft.client.ClientRecipeBook;
+import net.minecraft.client.Minecraft;
 import net.minecraft.client.RecipeBookCategories;
 import net.minecraft.client.gui.screens.recipebook.RecipeBookComponent;
+import net.minecraft.client.gui.screens.recipebook.RecipeBookPage;
+import net.minecraft.client.gui.screens.recipebook.RecipeBookTabButton;
+import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 @Mixin(RecipeBookComponent.class)
 public class RecipeBookComponentMixin {
-    @Definition(id = "recipeBookCategories", local = @Local(type = RecipeBookCategories.class))
-    @Definition(id = "FURNACE_SEARCH", field = "Lnet/minecraft/client/RecipeBookCategories;FURNACE_SEARCH:Lnet/minecraft/client/RecipeBookCategories;")
-    @Expression("recipeBookCategories != FURNACE_SEARCH")
-    @ModifyExpressionValue(
-            method = "updateTabs",
-            at = @At(value = "MIXINEXTRAS:EXPRESSION")
-    )
-    private boolean notCookingPotSearch(boolean original, @Local RecipeBookCategories recipeBookCategories) {
-        return original && recipeBookCategories != CobblemonRecipeCategories.COOKING_POT_SEARCH.toVanillaCategory();
+
+    @Shadow private ClientRecipeBook book;
+
+    @Shadow protected Minecraft minecraft;
+
+    @Shadow private int width;
+
+    @Shadow private int xOffset;
+
+    @Shadow private int height;
+
+    @Shadow @Final private RecipeBookPage recipeBookPage;
+
+    @Inject(method = "updateTabs", at = @At("HEAD"), cancellable = true)
+    private void customUpdateTabs(CallbackInfo ci) {
+        RecipeBookComponent instance = (RecipeBookComponent) (Object) this;
+        int i = (width - 147) / 2 - xOffset - 30;
+        int j = (height - 166) / 2 + 3;
+        int k = 27;
+        int l = 0;
+
+        for (RecipeBookTabButton recipeBookTabButton : instance.tabButtons) {
+            RecipeBookCategories recipeBookCategories = recipeBookTabButton.getCategory();
+            if (recipeBookCategories != RecipeBookCategories.CRAFTING_SEARCH && recipeBookCategories != RecipeBookCategories.FURNACE_SEARCH && recipeBookCategories != CobblemonRecipeCategories.COOKING_POT_SEARCH.toVanillaCategory()) {
+                if (recipeBookTabButton.updateVisibility(book)) {
+                    recipeBookTabButton.setPosition(i, j + 27 * l++);
+                    recipeBookTabButton.startAnimation(minecraft);
+                }
+            } else {
+                recipeBookTabButton.visible = true;
+                recipeBookTabButton.setPosition(i, j + k * l++);
+            }
+        }
+
+        ci.cancel();
     }
 }

common/src/main/java/com/cobblemon/mod/common/mixin/client/RenderStateShardMixin.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.mixin.client;
+
+import com.cobblemon.mod.common.client.render.RenderAlphaScope;
+import net.minecraft.client.renderer.RenderStateShard;
+import net.minecraft.client.renderer.RenderType;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(RenderStateShard.class)
+public abstract class RenderStateShardMixin {
+    @Inject(method = "setupRenderState", at = @At("RETURN"))
+    private void cobblemon$applyScopedAlpha(CallbackInfo ci) {
+        if ((Object) this instanceof RenderType) RenderAlphaScope.afterMaterialSetup();
+    }
+
+    @Inject(method = "clearRenderState", at = @At("RETURN"))
+    private void cobblemon$restoreScopedAlpha(CallbackInfo ci) {
+        if ((Object) this instanceof RenderType) RenderAlphaScope.afterMaterialClear();
+    }
+}

common/src/main/kotlin-templates/CobblemonBuildDetails.kt.peb

@@ -8,12 +8,8 @@ object CobblemonBuildDetails {
     const val VERSION = "{{ version }}"
     const val SNAPSHOT = {{ isSnapshot }}
 
-    // Read at runtime rather than templated in, so a new commit doesn't invalidate compiled code.
-    private val git = java.util.Properties().apply {
-        CobblemonBuildDetails::class.java.getResourceAsStream("/cobblemon-git.properties")?.use(::load)
-    }
-    @JvmField val GIT_COMMIT: String = git.getProperty("commit", "Not Specified")
-    @JvmField val BRANCH: String = git.getProperty("branch", "Not Specified")
+    const val GIT_COMMIT = "{{ gitCommit | default("Not Specified") }}"
+    const val BRANCH = "{{ branch | default("Not Specified") }}"
 
     fun smallCommitHash(): String {
         return this.GIT_COMMIT.substring(0, 7)

common/src/main/kotlin/com/cobblemon/mod/common/Cobblemon.kt

@@ -22,6 +22,8 @@ import com.cobblemon.mod.common.api.habitats.HabitatPools
 import com.cobblemon.mod.common.api.interaction.RequestManager
 import com.cobblemon.mod.common.api.molang.MoLangLoadedFilesCache
 import com.cobblemon.mod.common.api.molang.ObjectValue
+import com.cobblemon.mod.common.api.molangui.MolangUiActionRegistry
+import com.cobblemon.mod.common.api.molangui.MolangUiService
 import com.cobblemon.mod.common.api.permission.PermissionValidator
 import com.cobblemon.mod.common.api.pokeball.catching.calculators.CaptureCalculator
 import com.cobblemon.mod.common.api.pokeball.catching.calculators.CaptureCalculators
@@ -69,6 +71,7 @@ import com.cobblemon.mod.common.api.storage.player.adapter.TMMoveNbtBackend
 import com.cobblemon.mod.common.api.storage.player.factory.CachedPlayerDataStoreFactory
 import com.cobblemon.mod.common.api.tags.CobblemonEntityTypeTags
 import com.cobblemon.mod.common.api.tags.CobblemonItemTags
+import com.cobblemon.mod.common.api.vending.VendingMachinePageHandler
 import com.cobblemon.mod.common.battles.BagItems
 import com.cobblemon.mod.common.battles.BattleFormat
 import com.cobblemon.mod.common.battles.BattleRegistry
@@ -259,9 +262,7 @@ object Cobblemon {
             playerDataManager.onPlayerDisconnect(it.player)
             RequestManager.onLogoff(it.player)
             serverPlayerStructs.remove(it.player.uuid)
-        }
-        PlatformEvents.PLAYER_RESPAWN.subscribe {
-            serverPlayerStructs.remove(it.player.uuid)
+            MolangUiService.closeAllForPlayer(it.player.uuid)
         }
         PlatformEvents.PLAYER_DEATH.subscribe {
             PCLinkManager.removeLink(it.player.uuid)
@@ -324,6 +325,11 @@ object Cobblemon {
         // Start up the data provider.
         CobblemonDataProvider.registerDefaults()
 
+        MolangUiActionRegistry.register(
+            VendingMachinePageHandler.ACTION,
+            VendingMachinePageHandler
+        )
+
         SHINY_ASPECT.register()
         GENDER_ASPECT.register()
         COSMETIC_SLOT_ASPECT.register()
@@ -453,6 +459,7 @@ object Cobblemon {
         }
 
         PlatformEvents.SERVER_STOPPED.subscribe {
+            MolangUiService.closeAll()
             storage.unregisterAll(it.server.registryAccess())
             playerDataManager.saveAllStores()
             playerDataManager.saveExecutor.shutdown()

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonBlockEntities.kt

@@ -109,21 +109,4 @@ object CobblemonBlockEntities : PlatformRegistry<Registry<BlockEntityType<*>>, R
         "poke_snack",
         BlockEntityType.Builder.of(::PokeSnackBlockEntity, CobblemonBlocks.POKE_SNACK, CobblemonBlocks.POKE_CAKE).build(null)
     )
-
-    @JvmField
-    val TERRAIN_PLANT: BlockEntityType<TerrainPlantBlockEntity> = this.create(
-        "terrain_plant",
-        BlockEntityType.Builder.of(::TerrainPlantBlockEntity,
-            CobblemonBlocks.VOLTACONIA,
-            CobblemonBlocks.LUCIBELL,
-            CobblemonBlocks.VERDROOT
-        ).build(null)
-    )
-    @JvmField
-    val MISTLEAF_FLOWER: BlockEntityType<MistleafFlowerBlockEntity> = this.create(
-        "mistleaf",
-        BlockEntityType.Builder.of(::MistleafFlowerBlockEntity,
-            CobblemonBlocks.MISTLEAF
-        ).build(null)
-    )
 }

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonBlocks.kt

@@ -16,7 +16,8 @@ import com.cobblemon.mod.common.block.MintBlock.MintType
 import com.cobblemon.mod.common.block.campfirepot.CampfireBlock
 import com.cobblemon.mod.common.block.campfirepot.CampfirePotBlock
 import com.cobblemon.mod.common.block.chest.GildedChestBlock
-import com.cobblemon.mod.common.block.decor.*
+import com.cobblemon.mod.common.block.decor.ActivatableDecorationBlock
+import com.cobblemon.mod.common.block.decor.RingTargetBlock
 import com.cobblemon.mod.common.block.general.BaleBlock
 import com.cobblemon.mod.common.block.general.HorizontalRotationCarpetBlock
 import com.cobblemon.mod.common.block.general.HorizontalRotationalBlock
@@ -27,7 +28,6 @@ import com.cobblemon.mod.common.block.sign.CobblemonSignBlock
 import com.cobblemon.mod.common.block.sign.CobblemonWallHangingSignBlock
 import com.cobblemon.mod.common.block.sign.CobblemonWallSignBlock
 import com.cobblemon.mod.common.block.tmmachine.TMMachineBlock
-import com.cobblemon.mod.common.block.general.MintLitterBlock
 import com.cobblemon.mod.common.mixin.invoker.BlocksInvoker
 import com.cobblemon.mod.common.mixin.invoker.DoorBlockInvoker
 import com.cobblemon.mod.common.mixin.invoker.FireBlockInvoker
@@ -653,21 +653,15 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     val CHIPPED_POT = create("chipped_pot", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.DECORATED_POT).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.TEAPOT))
     @JvmField
     val CRACKED_POT = create("cracked_pot", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.DECORATED_POT).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.TEAPOT))
-    @JvmField
-    val ELECTIRIZER = create("electirizer", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.METAL).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.IZER))
-    @JvmField
-    val MAGMARIZER = create("magmarizer", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.METAL).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.IZER))
 
     @JvmField
     val SACHET = create("sachet", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.WOOL).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.POUCH))
     @JvmField
-    val METAL_POWDER = create("metal_powder", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_POWDER_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.POUCH))
+    val METAL_POWDER = create("metal_powder", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.WOOL).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.POUCH))
     @JvmField
-    val QUICK_POWDER = create("quick_powder", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_POWDER_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.POUCH))
+    val QUICK_POWDER = create("quick_powder", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.WOOL).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.POUCH))
     @JvmField
-    val BRIGHT_POWDER = create("bright_powder", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_POWDER_SOUNDS).mapColor(MapColor.NONE).noOcclusion().lightLevel{3}, DecorativeItemBlock.DecorativeItemBlockType.POUCH))
-    @JvmField
-    val SOFT_SAND = create("soft_sand", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_POWDER_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), DecorativeItemBlock.DecorativeItemBlockType.POUCH))
+    val BRIGHT_POWDER = create("bright_powder", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.WOOL).mapColor(MapColor.NONE).noOcclusion().lightLevel{3}, DecorativeItemBlock.DecorativeItemBlockType.POUCH))
 
     @JvmField
     val NEVER_MELT_ICE = create("never_melt_ice", DecorativeItemBlock(BlockBehaviour.Properties.of().sound(SoundType.GLASS).mapColor(MapColor.NONE).noOcclusion().friction(0.989F), DecorativeItemBlock.DecorativeItemBlockType.NEVERMELT))
@@ -697,7 +691,7 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     val EJECT_BUTTON = create("eject_button", EjectButtonBlock(BlockBehaviour.Properties.of().sound(SoundType.METAL).mapColor(MapColor.NONE).pushReaction(PushReaction.DESTROY).noOcclusion().strength(0.125f), 40))
 
     @JvmField
-    val LOADED_DICE = create("loaded_dice", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_DICE_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.DICE))
+    val LOADED_DICE = create("loaded_dice", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.DICE))
     @JvmField
     val IRON_BALL = create("iron_ball", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.METAL).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.IRON_BALL))
     @JvmField
@@ -708,46 +702,40 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     val DUBIOUS_DISC = create("dubious_disc", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.UPGRADE))
 
     @JvmField
-    val THROAT_SPRAY = create("throat_spray", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.THROAT_SPRAY))
-    @JvmField
-    val TERRAIN_EXTENDER = create("terrain_extender", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_METAL_CAN_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.EXTENDER))
-    @JvmField
-    val MOOMOO_MILK = create("moomoo_milk", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_JAR_GLASS_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.GLASS_BOTTLE))
-    @JvmField
-    val MEDICINAL_BREW = create("medicinal_brew", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_JAR_GLASS_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.GLASS_BOTTLE))
+    val THROAT_SPRAY = create("throat_spray", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.THROAT_SPRAY))
 
     @JvmField
-    val FULL_HEAL = create("full_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
+    val FULL_HEAL = create("full_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
     @JvmField
-    val ANTIDOTE = create("antidote", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
+    val ANTIDOTE = create("antidote", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
     @JvmField
-    val AWAKENING = create("awakening", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
+    val AWAKENING = create("awakening", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
     @JvmField
-    val BURN_HEAL = create("burn_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
+    val BURN_HEAL = create("burn_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
     @JvmField
-    val ICE_HEAL = create("ice_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
+    val ICE_HEAL = create("ice_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
     @JvmField
-    val PARALYZE_HEAL = create("paralyze_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
+    val PARALYZE_HEAL = create("paralyze_heal", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.STATUS_RESTORE))
 
     @JvmField
-    val ETHER = create("ether", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
+    val ETHER = create("ether", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
     @JvmField
-    val MAX_ETHER = create("max_ether", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
+    val MAX_ETHER = create("max_ether", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
     @JvmField
-    val ELIXIR = create("elixir", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
+    val ELIXIR = create("elixir", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
     @JvmField
-    val MAX_ELIXIR = create("max_elixir", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
+    val MAX_ELIXIR = create("max_elixir", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.ETHER))
 
     @JvmField
-    val POTION = create("potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.POTION))
+    val POTION = create("potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.POTION))
     @JvmField
-    val SUPER_POTION = create("super_potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.POTION))
+    val SUPER_POTION = create("super_potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.POTION))
     @JvmField
-    val HYPER_POTION = create("hyper_potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.POTION))
+    val HYPER_POTION = create("hyper_potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.POTION))
     @JvmField
-    val MAX_POTION = create("max_potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.MAX_POTION))
+    val MAX_POTION = create("max_potion", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.MAX_POTION))
     @JvmField
-    val FULL_RESTORE = create("full_restore", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.MAX_POTION))
+    val FULL_RESTORE = create("full_restore", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.MAX_POTION))
 
     @JvmField
     val DIRE_HIT = create("dire_hit", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.BATTLE_ITEM))
@@ -767,21 +755,21 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     val X_SPEED = create("x_${Stats.SPEED.identifier.path}", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.BATTLE_ITEM))
 
     @JvmField
-    val HP_UP = create("hp_up", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val HP_UP = create("hp_up", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
     @JvmField
-    val PROTEIN = create("protein", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val PROTEIN = create("protein", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
     @JvmField
-    val IRON = create("iron", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val IRON = create("iron", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
     @JvmField
-    val CARBOS = create("carbos", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val CARBOS = create("carbos", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
     @JvmField
-    val CALCIUM = create("calcium", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val CALCIUM = create("calcium", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
     @JvmField
-    val ZINC = create("zinc", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val ZINC = create("zinc", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
     @JvmField
-    val PP_UP = create("pp_up", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val PP_UP = create("pp_up", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
     @JvmField
-    val PP_MAX = create("pp_max", StackableItemBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.ITEM_BLOCK_BOTTLE_PILLS_SOUNDS).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
+    val PP_MAX = create("pp_max", StackableItemBlock(BlockBehaviour.Properties.of().sound(SoundType.CANDLE).mapColor(MapColor.NONE).noOcclusion(), StackableItemBlock.StackableItemBlockType.VITAMIN))
 
     @JvmField
     val MONITOR = create("monitor", MonitorBlock(BlockBehaviour.Properties.of().mapColor(MapColor.METAL).sound(SoundType.METAL).pushReaction(PushReaction.BLOCK).requiresCorrectToolForDrops().strength(5.0F, 6.0F).lightLevel { if (it.getValue(MonitorBlock.SCREEN) != MonitorBlock.MonitorScreen.OFF) 13 else 0 }))
@@ -798,7 +786,6 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     @JvmField
     val PC = create("pc", PCBlock(BlockBehaviour.Properties.of().mapColor(MapColor.METAL).sound(SoundType.METAL).pushReaction(PushReaction.BLOCK).strength(2F).noOcclusion().lightLevel { if ((it.getValue(PCBlock.ON) as Boolean) && (it.getValue(PCBlock.PART) == PCBlock.PCPart.TOP)) 13 else 0 }))
 
-    @JvmField
     val TM_MACHINE = create(
             "tm_machine",
         TMMachineBlock(
@@ -821,13 +808,16 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     @JvmField
     val DISPLAY_CASE = create("display_case", DisplayCaseBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.DISPLAY_CASE_SOUNDS).noOcclusion().pushReaction(PushReaction.BLOCK).mapColor(MapColor.STONE).strength(0.3F).requiresCorrectToolForDrops()))
 
+    @JvmField
+    val VENDING_MACHINE = create("vending_machine", VendingMachineBlock(BlockBehaviour.Properties.of().mapColor(MapColor.METAL).sound(SoundType.METAL).pushReaction(PushReaction.BLOCK).strength(2F).requiresCorrectToolForDrops()))
+
     // TODO after 1.7
 //    @JvmField
 //    val INCENSE_SWEET = create("incense_sweet", SweetIncenseBlock(BlockBehaviour.Properties.of().sound(CobblemonSounds.DISPLAY_CASE_SOUNDS).noOcclusion().pushReaction(PushReaction.BLOCK).mapColor(MapColor.STONE).strength(0.3F)))
 
     @JvmField
     val PASTURE = create("pasture", PastureBlock(BlockBehaviour.Properties.of().mapColor(MapColor.COLOR_BROWN).sound(SoundType.WOOD).strength(2F).noOcclusion().pushReaction(PushReaction.BLOCK).lightLevel { if ((it.getValue(PastureBlock.ON) as Boolean) && (it.getValue(PastureBlock.PART) == PastureBlock.PasturePart.TOP)) 13 else 0 }))
-    @JvmField
+
     val RED_MINT = create("red_mint", MintBlock(MintType.RED, BlockBehaviour.Properties.of().mapColor(MapColor.COLOR_RED).noCollission().randomTicks().instabreak().sound(CobblemonSounds.MINT_SOUNDS).pushReaction(PushReaction.DESTROY)))
     @JvmField
     val BLUE_MINT = create("blue_mint", MintBlock(MintType.BLUE, BlockBehaviour.Properties.of().mapColor(MapColor.COLOR_BLUE).noCollission().randomTicks().instabreak().sound(CobblemonSounds.MINT_SOUNDS).pushReaction(PushReaction.DESTROY)))
@@ -845,68 +835,29 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     @JvmField
     val PEP_UP_FLOWER = this.create("pep_up_flower", FlowerBlock(MobEffects.LEVITATION, 10F, BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).noCollission().instabreak().sound(SoundType.GRASS).offsetType(BlockBehaviour.OffsetType.XZ).pushReaction(PushReaction.DESTROY)))
     @JvmField
+    val POTTED_PEP_UP_FLOWER = this.create("potted_pep_up_flower", BlocksInvoker.createFlowerPotBlock(PEP_UP_FLOWER))
+    @JvmField
     val HEARTY_GRAINS = this.create("hearty_grains", HeartyGrainsBlock(BlockBehaviour.Properties.of().pushReaction(PushReaction.DESTROY).ignitedByLava().mapColor(MapColor.PLANT).noCollission().randomTicks().instabreak()))
+
     @JvmField
     val GALARICA_NUT_BUSH = this.create("galarica_nut_bush", NutBushBlock(BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).randomTicks().noCollission().sound(SoundType.SWEET_BERRY_BUSH).pushReaction(PushReaction.DESTROY)))
 
-
     @JvmField
-    val RED_MINT_LEAF_LITTER = this.mintLitter("red_mint_leaf_litter", MapColor.COLOR_RED)
+    val POTTED_RED_APRICORN_SAPLING = this.create("potted_red_apricorn_sapling", BlocksInvoker.createFlowerPotBlock(RED_APRICORN_SAPLING))
     @JvmField
-    val POTTED_RED_MINT = this.flowerPot("potted_red_mint", RED_MINT_LEAF_LITTER)
+    val POTTED_YELLOW_APRICORN_SAPLING = this.create("potted_yellow_apricorn_sapling", BlocksInvoker.createFlowerPotBlock(YELLOW_APRICORN_SAPLING))
     @JvmField
-    val BLUE_MINT_LEAF_LITTER = this.mintLitter("blue_mint_leaf_litter", MapColor.COLOR_BLUE)
+    val POTTED_GREEN_APRICORN_SAPLING = this.create("potted_green_apricorn_sapling", BlocksInvoker.createFlowerPotBlock(GREEN_APRICORN_SAPLING))
     @JvmField
-    val POTTED_BLUE_MINT = this.flowerPot("potted_blue_mint", BLUE_MINT_LEAF_LITTER)
+    val POTTED_BLUE_APRICORN_SAPLING = this.create("potted_blue_apricorn_sapling", BlocksInvoker.createFlowerPotBlock(BLUE_APRICORN_SAPLING))
     @JvmField
-    val CYAN_MINT_LEAF_LITTER = this.mintLitter("cyan_mint_leaf_litter", MapColor.COLOR_CYAN)
+    val POTTED_PINK_APRICORN_SAPLING = this.create("potted_pink_apricorn_sapling", BlocksInvoker.createFlowerPotBlock(PINK_APRICORN_SAPLING))
     @JvmField
-    val POTTED_CYAN_MINT = this.flowerPot("potted_cyan_mint", CYAN_MINT_LEAF_LITTER)
+    val POTTED_BLACK_APRICORN_SAPLING = this.create("potted_black_apricorn_sapling", BlocksInvoker.createFlowerPotBlock(BLACK_APRICORN_SAPLING))
     @JvmField
-    val PINK_MINT_LEAF_LITTER = this.mintLitter("pink_mint_leaf_litter", MapColor.COLOR_PINK)
+    val POTTED_WHITE_APRICORN_SAPLING = this.create("potted_white_apricorn_sapling", BlocksInvoker.createFlowerPotBlock(WHITE_APRICORN_SAPLING))
     @JvmField
-    val POTTED_PINK_MINT = this.flowerPot("potted_pink_mint", PINK_MINT_LEAF_LITTER)
-    @JvmField
-    val GREEN_MINT_LEAF_LITTER = this.mintLitter("green_mint_leaf_litter", MapColor.COLOR_GREEN)
-    @JvmField
-    val POTTED_GREEN_MINT = this.flowerPot("potted_green_mint", GREEN_MINT_LEAF_LITTER)
-    @JvmField
-    val WHITE_MINT_LEAF_LITTER = this.mintLitter("white_mint_leaf_litter", MapColor.SNOW)
-    @JvmField
-    val POTTED_WHITE_MINT = this.flowerPot("potted_white_mint", WHITE_MINT_LEAF_LITTER)
-
-    @JvmField
-    val LOBAILA = this.create("lobaila", LobailaFlowerBlock(BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).noCollission().instabreak().sound(SoundType.GRASS).offsetType(BlockBehaviour.OffsetType.XZ).ignitedByLava().pushReaction(PushReaction.DESTROY)))
-    @JvmField
-    val POMOHANA = this.create("pomohana", PomohanaFlowerBlock(BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).noCollission().instabreak().sound(SoundType.GRASS).ignitedByLava().pushReaction(PushReaction.DESTROY)))
-    @JvmField
-    val PAUVILLEA = this.create("pauvillea",PauvilleaFlowerBlock(BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).noCollission().sound(SoundType.GRASS).instabreak().ignitedByLava().pushReaction(PushReaction.DESTROY)))
-    @JvmField
-    val WISTENSU = this.create("wistensu", WistensuFlowerHeadBlock(BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).noCollission().sound(SoundType.GRASS).instabreak().ignitedByLava().pushReaction(PushReaction.DESTROY).lightLevel{11}))
-    @JvmField
-    val WISTENSU_VINE = this.create("wistensu_vine", WistensuFlowerVineBlock(BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).noCollission().sound(SoundType.GRASS).instabreak().ignitedByLava().pushReaction(PushReaction.DESTROY)))
-
-    @JvmField
-    val ELECTRIC_SEED = this.terrainSeed("electric_seed", TerrainSeedBlock.TerrainSeedType.ELECTRIC)
-    @JvmField
-    val PSYCHIC_SEED = this.terrainSeed("psychic_seed", TerrainSeedBlock.TerrainSeedType.PSYCHIC)
-    @JvmField
-    val MISTY_SEED = this.terrainSeed("misty_seed", TerrainSeedBlock.TerrainSeedType.MISTY)
-    @JvmField
-    val GRASSY_SEED = this.terrainSeed("grassy_seed", TerrainSeedBlock.TerrainSeedType.GRASSY)
-    @JvmField
-    val VOLTACONIA = this.terrainPlant("voltaconia") { state -> if (state.getValue(TerrainPlantBlock.GLOWING)) 8 else 0 }
-    @JvmField
-    val VERDROOT = this.terrainPlant("verdroot") { state -> if (state.getValue(TerrainPlantBlock.GLOWING)) 5 else 0 }
-    @JvmField
-    val LUCIBELL = this.terrainPlant("lucibell") { state -> if (state.getValue(TerrainPlantBlock.GLOWING)) 8 else 0 }
-    @JvmField
-    val MISTLEAF = this.create(
-        "mistleaf",
-        MistleafFlowerBlock {
-            if ((it.getValue(MistleafFlowerBlock.GLOWING) >= 1)) it.getValue(MistleafFlowerBlock.GLOWING) + 2 else 0
-        }
-    )
+    val POTTED_SACCHARINE_SAPLING = this.create("potted_saccharine_sapling", BlocksInvoker.createFlowerPotBlock(SACCHARINE_SAPLING))
 
     @JvmField
     val HEARTY_GRAIN_BALE = this.create("hearty_grain_bale", BaleBlock(BlockBehaviour.Properties.of().mapColor(MapColor.PLANT).instrument(NoteBlockInstrument.BANJO).strength(0.5F).sound(CobblemonSounds.HEARTY_GRAIN_BALE_SOUNDS)))
@@ -1084,165 +1035,6 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     val YACHE_BERRY = this.berryBlock("yache")
     //val BINDING_SOIL = this.create("binding_soil", BindingSoilBlock(BlockBehaviour.Properties.of()))
 
-    @JvmField
-    val POTTED_AGUAV_BERRY = this.flowerPot("potted_aguav_berry", AGUAV_BERRY)
-    @JvmField
-    val POTTED_APICOT_BERRY = this.flowerPot("potted_apicot_berry", APICOT_BERRY)
-    @JvmField
-    val POTTED_ASPEAR_BERRY = this.flowerPot("potted_aspear_berry", ASPEAR_BERRY)
-    @JvmField
-    val POTTED_BABIRI_BERRY = this.flowerPot("potted_babiri_berry", BABIRI_BERRY)
-    @JvmField
-    val POTTED_BELUE_BERRY = this.flowerPot("potted_belue_berry", BELUE_BERRY)
-    @JvmField
-    val POTTED_BLUK_BERRY = this.flowerPot("potted_bluk_berry", BLUK_BERRY)
-    @JvmField
-    val POTTED_CHARTI_BERRY = this.flowerPot("potted_charti_berry", CHARTI_BERRY)
-    @JvmField
-    val POTTED_CHERI_BERRY = this.flowerPot("potted_cheri_berry", CHERI_BERRY)
-    @JvmField
-    val POTTED_CHESTO_BERRY = this.flowerPot("potted_chesto_berry", CHESTO_BERRY)
-    @JvmField
-    val POTTED_CHILAN_BERRY = this.flowerPot("potted_chilan_berry", CHILAN_BERRY)
-    @JvmField
-    val POTTED_CHOPLE_BERRY = this.flowerPot("potted_chople_berry", CHOPLE_BERRY)
-    @JvmField
-    val POTTED_COBA_BERRY = this.flowerPot("potted_coba_berry", COBA_BERRY)
-    @JvmField
-    val POTTED_COLBUR_BERRY = this.flowerPot("potted_colbur_berry", COLBUR_BERRY)
-    @JvmField
-    val POTTED_CORNN_BERRY = this.flowerPot("potted_cornn_berry", CORNN_BERRY)
-    @JvmField
-    val POTTED_CUSTAP_BERRY = this.flowerPot("potted_custap_berry", CUSTAP_BERRY)
-    @JvmField
-    val POTTED_DURIN_BERRY = this.flowerPot("potted_durin_berry", DURIN_BERRY)
-    @JvmField
-    val POTTED_EGGANT_BERRY = this.flowerPot("potted_eggant_berry", EGGANT_BERRY)
-    @JvmField
-    val POTTED_ENIGMA_BERRY = this.flowerPot("potted_enigma_berry", ENIGMA_BERRY)
-    @JvmField
-    val POTTED_FIGY_BERRY = this.flowerPot("potted_figy_berry", FIGY_BERRY)
-    @JvmField
-    val POTTED_GANLON_BERRY = this.flowerPot("potted_ganlon_berry", GANLON_BERRY)
-    @JvmField
-    val POTTED_GREPA_BERRY = this.flowerPot("potted_grepa_berry", GREPA_BERRY)
-    @JvmField
-    val POTTED_HABAN_BERRY = this.flowerPot("potted_haban_berry", HABAN_BERRY)
-    @JvmField
-    val POTTED_HONDEW_BERRY = this.flowerPot("potted_hondew_berry", HONDEW_BERRY)
-    @JvmField
-    val POTTED_HOPO_BERRY = this.flowerPot("potted_hopo_berry", HOPO_BERRY)
-    @JvmField
-    val POTTED_IAPAPA_BERRY = this.flowerPot("potted_iapapa_berry", IAPAPA_BERRY)
-    @JvmField
-    val POTTED_JABOCA_BERRY = this.flowerPot("potted_jaboca_berry", JABOCA_BERRY)
-    @JvmField
-    val POTTED_KASIB_BERRY = this.flowerPot("potted_kasib_berry", KASIB_BERRY)
-    @JvmField
-    val POTTED_KEBIA_BERRY = this.flowerPot("potted_kebia_berry", KEBIA_BERRY)
-    @JvmField
-    val POTTED_KEE_BERRY = this.flowerPot("potted_kee_berry", KEE_BERRY)
-    @JvmField
-    val POTTED_KELPSY_BERRY = this.flowerPot("potted_kelpsy_berry", KELPSY_BERRY)
-    @JvmField
-    val POTTED_LANSAT_BERRY = this.flowerPot("potted_lansat_berry", LANSAT_BERRY)
-    @JvmField
-    val POTTED_LEPPA_BERRY = this.flowerPot("potted_leppa_berry", LEPPA_BERRY)
-    @JvmField
-    val POTTED_LIECHI_BERRY = this.flowerPot("potted_liechi_berry", LIECHI_BERRY)
-    @JvmField
-    val POTTED_LUM_BERRY = this.flowerPot("potted_lum_berry", LUM_BERRY)
-    @JvmField
-    val POTTED_MAGO_BERRY = this.flowerPot("potted_mago_berry", MAGO_BERRY)
-    @JvmField
-    val POTTED_MAGOST_BERRY = this.flowerPot("potted_magost_berry", MAGOST_BERRY)
-    @JvmField
-    val POTTED_MARANGA_BERRY = this.flowerPot("potted_maranga_berry", MARANGA_BERRY)
-    @JvmField
-    val POTTED_MICLE_BERRY = this.flowerPot("potted_micle_berry", MICLE_BERRY)
-    @JvmField
-    val POTTED_NANAB_BERRY = this.flowerPot("potted_nanab_berry", NANAB_BERRY)
-    @JvmField
-    val POTTED_NOMEL_BERRY = this.flowerPot("potted_nomel_berry", NOMEL_BERRY)
-    @JvmField
-    val POTTED_OCCA_BERRY = this.flowerPot("potted_occa_berry", OCCA_BERRY)
-    @JvmField
-    val POTTED_ORAN_BERRY = this.flowerPot("potted_oran_berry", ORAN_BERRY)
-    @JvmField
-    val POTTED_PAMTRE_BERRY = this.flowerPot("potted_pamtre_berry", PAMTRE_BERRY)
-    @JvmField
-    val POTTED_PASSHO_BERRY = this.flowerPot("potted_passho_berry", PASSHO_BERRY)
-    @JvmField
-    val POTTED_PAYAPA_BERRY = this.flowerPot("potted_payapa_berry", PAYAPA_BERRY)
-    @JvmField
-    val POTTED_PECHA_BERRY = this.flowerPot("potted_pecha_berry", PECHA_BERRY)
-    @JvmField
-    val POTTED_PERSIM_BERRY = this.flowerPot("potted_persim_berry", PERSIM_BERRY)
-    @JvmField
-    val POTTED_PETAYA_BERRY = this.flowerPot("potted_petaya_berry", PETAYA_BERRY)
-    @JvmField
-    val POTTED_PINAP_BERRY = this.flowerPot("potted_pinap_berry", PINAP_BERRY)
-    @JvmField
-    val POTTED_POMEG_BERRY = this.flowerPot("potted_pomeg_berry", POMEG_BERRY)
-    @JvmField
-    val POTTED_QUALOT_BERRY = this.flowerPot("potted_qualot_berry", QUALOT_BERRY)
-    @JvmField
-    val POTTED_RABUTA_BERRY = this.flowerPot("potted_rabuta_berry", RABUTA_BERRY)
-    @JvmField
-    val POTTED_RAWST_BERRY = this.flowerPot("potted_rawst_berry", RAWST_BERRY)
-    @JvmField
-    val POTTED_RAZZ_BERRY = this.flowerPot("potted_razz_berry", RAZZ_BERRY)
-    @JvmField
-    val POTTED_RINDO_BERRY = this.flowerPot("potted_rindo_berry", RINDO_BERRY)
-    @JvmField
-    val POTTED_ROSELI_BERRY = this.flowerPot("potted_roseli_berry", ROSELI_BERRY)
-    @JvmField
-    val POTTED_ROWAP_BERRY = this.flowerPot("potted_rowap_berry", ROWAP_BERRY)
-    @JvmField
-    val POTTED_SALAC_BERRY = this.flowerPot("potted_salac_berry", SALAC_BERRY)
-    @JvmField
-    val POTTED_SHUCA_BERRY = this.flowerPot("potted_shuca_berry", SHUCA_BERRY)
-    @JvmField
-    val POTTED_SITRUS_BERRY = this.flowerPot("potted_sitrus_berry", SITRUS_BERRY)
-    @JvmField
-    val POTTED_SPELON_BERRY = this.flowerPot("potted_spelon_berry", SPELON_BERRY)
-    @JvmField
-    val POTTED_STARF_BERRY = this.flowerPot("potted_starf_berry", STARF_BERRY)
-    @JvmField
-    val POTTED_TAMATO_BERRY = this.flowerPot("potted_tamato_berry", TAMATO_BERRY)
-    @JvmField
-    val POTTED_TANGA_BERRY = this.flowerPot("potted_tanga_berry", TANGA_BERRY)
-    @JvmField
-    val POTTED_TOUGA_BERRY = this.flowerPot("potted_touga_berry", TOUGA_BERRY)
-    @JvmField
-    val POTTED_WACAN_BERRY = this.flowerPot("potted_wacan_berry", WACAN_BERRY)
-    @JvmField
-    val POTTED_WATMEL_BERRY = this.flowerPot("potted_watmel_berry", WATMEL_BERRY)
-    @JvmField
-    val POTTED_WEPEAR_BERRY = this.flowerPot("potted_wepear_berry", WEPEAR_BERRY)
-    @JvmField
-    val POTTED_WIKI_BERRY = this.flowerPot("potted_wiki_berry", WIKI_BERRY)
-    @JvmField
-    val POTTED_YACHE_BERRY = this.flowerPot("potted_yache_berry", YACHE_BERRY)
-    @JvmField
-    val POTTED_PEP_UP_FLOWER = this.flowerPot("potted_pep_up_flower", PEP_UP_FLOWER)
-    @JvmField
-    val POTTED_RED_APRICORN_SAPLING = this.flowerPot("potted_red_apricorn_sapling", RED_APRICORN_SAPLING)
-    @JvmField
-    val POTTED_YELLOW_APRICORN_SAPLING = this.flowerPot("potted_yellow_apricorn_sapling", YELLOW_APRICORN_SAPLING)
-    @JvmField
-    val POTTED_GREEN_APRICORN_SAPLING = this.flowerPot("potted_green_apricorn_sapling", GREEN_APRICORN_SAPLING)
-    @JvmField
-    val POTTED_BLUE_APRICORN_SAPLING = this.flowerPot("potted_blue_apricorn_sapling", BLUE_APRICORN_SAPLING)
-    @JvmField
-    val POTTED_PINK_APRICORN_SAPLING = this.flowerPot("potted_pink_apricorn_sapling", PINK_APRICORN_SAPLING)
-    @JvmField
-    val POTTED_BLACK_APRICORN_SAPLING = this.flowerPot("potted_black_apricorn_sapling", BLACK_APRICORN_SAPLING)
-    @JvmField
-    val POTTED_WHITE_APRICORN_SAPLING = this.flowerPot("potted_white_apricorn_sapling", WHITE_APRICORN_SAPLING)
-    @JvmField
-    val POTTED_SACCHARINE_SAPLING = this.flowerPot("potted_saccharine_sapling", SACCHARINE_SAPLING)
-
     init {
         /**
          * Makes all blocks in array flammable by adding them to FireBlock's flammableRegistry.
@@ -1344,57 +1136,4 @@ object CobblemonBlocks : PlatformRegistry<Registry<Block>, ResourceKey<Registry<
     }
 
     fun typeGemClusters() = typeGemClusters.toMap()
-
-    private fun flowerPot(name: String, flower: Block) = this.create(
-        name,
-        FlowerPotBlock(
-            flower,
-            BlockBehaviour.Properties.of()
-                .instabreak()
-                .noOcclusion()
-                .pushReaction(PushReaction.DESTROY)
-        )
-    )
-
-    private fun mintLitter(name: String, color: MapColor) = this.create(
-        name,
-        MintLitterBlock(
-            BlockBehaviour.Properties.of()
-                .sound(CobblemonSounds.MINT_SOUNDS)
-                .mapColor(color)
-                .noOcclusion()
-                .noCollission()
-                .pushReaction(PushReaction.DESTROY)
-        )
-    )
-
-    private fun terrainSeed(name: String, type: TerrainSeedBlock.TerrainSeedType) = this.create(
-        name,
-        TerrainSeedBlock(
-            type,
-            BlockBehaviour.Properties.of()
-                .pushReaction(PushReaction.DESTROY)
-                .ignitedByLava()
-                .mapColor(MapColor.PLANT)
-                .offsetType(BlockBehaviour.OffsetType.XZ)
-                .noCollission()
-                .randomTicks()
-                .instabreak()
-        )
-    )
-
-    private fun terrainPlant(name: String, lightLevel: (BlockState) -> Int) = this.create(
-        name,
-        TerrainPlantBlock(
-            BlockBehaviour.Properties.of()
-                .mapColor(MapColor.PLANT)
-                .noCollission()
-                .instabreak()
-                .sound(SoundType.GRASS)
-                .offsetType(BlockBehaviour.OffsetType.XZ)
-                .ignitedByLava()
-                .pushReaction(PushReaction.DESTROY)
-                .lightLevel(lightLevel)
-        )
-    )
 }

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonCommands.kt

@@ -77,5 +77,6 @@ object CobblemonCommands {
         // Possibly lock down registration if and only if under dev environment or running in an environment
         // with a certain system environment variable set
         CobblemonInfoCommand.register(dispatcher)
+        MolangUiCommand.register(dispatcher)
     }
 }

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonImplementation.kt

@@ -12,7 +12,6 @@ import com.cobblemon.mod.common.api.net.NetworkPacket
 import com.mojang.brigadier.arguments.ArgumentType
 import kotlin.reflect.KClass
 import net.minecraft.commands.synchronization.ArgumentTypeInfo
-import net.minecraft.core.HolderLookup
 import net.minecraft.resources.ResourceKey
 import net.minecraft.resources.ResourceLocation
 import net.minecraft.server.MinecraftServer
@@ -169,16 +168,12 @@ interface CobblemonImplementation {
      * TODO
      *
      * @param identifier
-     * @param reloaderFactory
+     * @param reloader
      * @param type
      * @param dependencies
      */
-    fun registerResourceReloader(
-        identifier: ResourceLocation,
-        type: PackType,
-        dependencies: Collection<ResourceLocation>,
-        reloaderFactory: (HolderLookup.Provider) -> PreparableReloadListener
-    )
+    fun registerResourceReloader(identifier: ResourceLocation, reloader: PreparableReloadListener, type: PackType, dependencies: Collection<ResourceLocation>)
+
     /**
      * TODO
      *

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonItems.kt

@@ -465,6 +465,8 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     val PASTURE = blockItem("pasture", CobblemonBlocks.PASTURE)
     @JvmField
     val DISPLAY_CASE = blockItem("display_case", CobblemonBlocks.DISPLAY_CASE)
+    @JvmField
+    val VENDING_MACHINE = blockItem("vending_machine", CobblemonBlocks.VENDING_MACHINE)
 //    @JvmField
 //    val INCENSE_SWEET = blockItem("incense_sweet", CobblemonBlocks.INCENSE_SWEET) // TODO after 1.7
 
@@ -477,8 +479,8 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField val DUBIOUS_DISC = itemNameBlockItem("dubious_disc", CobblemonBlocks.DUBIOUS_DISC)
     @JvmField val DEEP_SEA_SCALE = noSettingsItem("deep_sea_scale")
     @JvmField val DEEP_SEA_TOOTH = noSettingsItem("deep_sea_tooth")
-    @JvmField val ELECTIRIZER = itemNameBlockItem("electirizer", CobblemonBlocks.ELECTIRIZER)
-    @JvmField val MAGMARIZER = itemNameBlockItem("magmarizer", CobblemonBlocks.MAGMARIZER)
+    @JvmField val ELECTIRIZER = noSettingsItem("electirizer")
+    @JvmField val MAGMARIZER = noSettingsItem("magmarizer")
     @JvmField val OVAL_STONE = noSettingsItem("oval_stone")
     @JvmField val PROTECTOR = noSettingsItem("protector")
     @JvmField val REAPER_CLOTH = noSettingsItem("reaper_cloth")
@@ -711,7 +713,7 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val PEP_UP_FLOWER = compostableBlockItem("pep_up_flower", CobblemonBlocks.PEP_UP_FLOWER)
     @JvmField
-    val MEDICINAL_BREW = itemNameBlockItem("medicinal_brew", CobblemonBlocks.MEDICINAL_BREW)
+    val MEDICINAL_BREW = noSettingsItem("medicinal_brew")
     @JvmField
     val REMEDY = compostableItem("remedy", RemedyItem(RemedyItem.NORMAL), 0.65f)
     @JvmField
@@ -719,7 +721,7 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val SUPERB_REMEDY = compostableItem("superb_remedy", RemedyItem(RemedyItem.SUPERB), 1f)
     @JvmField
-    val MOOMOO_MILK = create("moomoo_milk", MoomooMilk(Item.Properties().craftRemainder(Items.GLASS_BOTTLE).stacksTo((16)), CobblemonBlocks.MOOMOO_MILK))
+    val MOOMOO_MILK = create("moomoo_milk", MoomooMilk(Item.Properties().craftRemainder(Items.GLASS_BOTTLE).stacksTo((16))))
 
     @JvmField
     val POTION = create("potion", PotionItem(PotionType.POTION, CobblemonBlocks.POTION))
@@ -748,27 +750,27 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val RED_MINT_SEEDS = mintSeed("red", MintType.RED.getCropBlock())
     @JvmField
-    val RED_MINT_LEAF = compostableItemNameBlockItem("red_mint_leaf", CobblemonBlocks.RED_MINT_LEAF_LITTER, 0.50f)
+    val RED_MINT_LEAF = mintLeaf("red", MintLeafItem(MintType.RED))
     @JvmField
     val BLUE_MINT_SEEDS = mintSeed("blue", MintType.BLUE.getCropBlock())
     @JvmField
-    val BLUE_MINT_LEAF = compostableItemNameBlockItem("blue_mint_leaf", CobblemonBlocks.BLUE_MINT_LEAF_LITTER, 0.50f)
+    val BLUE_MINT_LEAF = mintLeaf("blue", MintLeafItem(MintType.BLUE))
     @JvmField
     val CYAN_MINT_SEEDS = mintSeed("cyan", MintType.CYAN.getCropBlock())
     @JvmField
-    val CYAN_MINT_LEAF = compostableItemNameBlockItem("cyan_mint_leaf", CobblemonBlocks.CYAN_MINT_LEAF_LITTER, 0.50f)
+    val CYAN_MINT_LEAF = mintLeaf("cyan", MintLeafItem(MintType.CYAN))
     @JvmField
     val PINK_MINT_SEEDS = mintSeed("pink", MintType.PINK.getCropBlock())
     @JvmField
-    val PINK_MINT_LEAF = compostableItemNameBlockItem("pink_mint_leaf", CobblemonBlocks.PINK_MINT_LEAF_LITTER, 0.50f)
+    val PINK_MINT_LEAF = mintLeaf("pink", MintLeafItem(MintType.PINK))
     @JvmField
     val GREEN_MINT_SEEDS = mintSeed("green", MintType.GREEN.getCropBlock())
     @JvmField
-    val GREEN_MINT_LEAF = compostableItemNameBlockItem("green_mint_leaf", CobblemonBlocks.GREEN_MINT_LEAF_LITTER, 0.50f)
+    val GREEN_MINT_LEAF = mintLeaf("green", MintLeafItem(MintType.GREEN))
     @JvmField
     val WHITE_MINT_SEEDS = mintSeed("white", MintType.WHITE.getCropBlock())
     @JvmField
-    val WHITE_MINT_LEAF = compostableItemNameBlockItem("white_mint_leaf", CobblemonBlocks.WHITE_MINT_LEAF_LITTER, 0.50f)
+    val WHITE_MINT_LEAF = mintLeaf("white", MintLeafItem(MintType.WHITE))
 
     val mints = mutableMapOf<String, MintItem>()
 
@@ -969,7 +971,7 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val EJECT_PACK = heldItem("eject_pack")
     @JvmField
-    val ELECTRIC_SEED = itemNameBlockItem("electric_seed", CobblemonBlocks.ELECTRIC_SEED)
+    val ELECTRIC_SEED = heldItem("electric_seed")
     @JvmField
     val EVERSTONE = heldItem("everstone")
     @JvmField
@@ -985,7 +987,7 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val FOCUS_SASH = heldItem("focus_sash")
     @JvmField
-    val GRASSY_SEED = itemNameBlockItem("grassy_seed", CobblemonBlocks.GRASSY_SEED)
+    val GRASSY_SEED = heldItem("grassy_seed")
     @JvmField
     val GRIP_CLAW = heldItem("grip_claw")
     @JvmField
@@ -1033,7 +1035,7 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val POWER_WEIGHT = heldItem("power_weight")
     @JvmField
-    val PSYCHIC_SEED = itemNameBlockItem("psychic_seed", CobblemonBlocks.PSYCHIC_SEED)
+    val PSYCHIC_SEED = heldItem("psychic_seed")
     @JvmField
     val PROTECTIVE_PADS = heldItem("protective_pads")
     @JvmField
@@ -1057,7 +1059,7 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val SILVER_POWDER = heldItem("silver_powder")
     @JvmField
-    val SOFT_SAND = itemNameBlockItem("soft_sand", CobblemonBlocks.SOFT_SAND)
+    val SOFT_SAND = heldItem("soft_sand")
     @JvmField
     val SMOKE_BALL = itemNameBlockItem("smoke_ball", CobblemonBlocks.SMOKE_BALL)
     @JvmField
@@ -1065,7 +1067,7 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val STICKY_BARB = heldItem("sticky_barb")
     @JvmField
-    val TERRAIN_EXTENDER = itemNameBlockItem("terrain_extender", CobblemonBlocks.TERRAIN_EXTENDER)
+    val TERRAIN_EXTENDER = heldItem("terrain_extender")
     @JvmField
     val THROAT_SPRAY = itemNameBlockItem("throat_spray", CobblemonBlocks.THROAT_SPRAY)
     @JvmField
@@ -1085,13 +1087,13 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     @JvmField
     val MIRROR_HERB = compostableHeldItem("mirror_herb", null, 0.85F)
     @JvmField
-    val MISTY_SEED = itemNameBlockItem("misty_seed", CobblemonBlocks.MISTY_SEED)
+    val MISTY_SEED = heldItem("misty_seed")
     @JvmField
     val POWER_HERB = compostableHeldItem("power_herb", null, 0.85F)
     @JvmField
     val WHITE_HERB = compostableHeldItem("white_herb", null, 0.85F)
     @JvmField
-    val BRIGHT_POWDER = glowItem("bright_powder", CobblemonBlocks.BRIGHT_POWDER)
+    val BRIGHT_POWDER = itemNameBlockItem("bright_powder", CobblemonBlocks.BRIGHT_POWDER)
     @JvmField
     val METAL_POWDER = itemNameBlockItem("metal_powder", CobblemonBlocks.METAL_POWDER)
     @JvmField
@@ -1558,25 +1560,6 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     //@JvmField
     //val BINDING_SOIL = blockItem("binding_soil", CobblemonBlocks.BINDING_SOIL)
 
-    // Plants, Flora, and Flowers
-    @JvmField
-    val LOBAILA = compostableBlockItem("lobaila", CobblemonBlocks.LOBAILA, 0.65f)
-    @JvmField
-    val POMOHANA = compostableBlockItem("pomohana", CobblemonBlocks.POMOHANA, 0.3f)
-    @JvmField
-    val PAUVILLEA = compostableBlockItem("pauvillea", CobblemonBlocks.PAUVILLEA, 0.65f)
-    @JvmField
-    val WISTENSU = compostableBlockItem("wistensu", CobblemonBlocks.WISTENSU, 0.5f)
-
-    @JvmField
-    val VOLTACONIA = compostableBlockItem("voltaconia", CobblemonBlocks.VOLTACONIA, 0.85f)
-    @JvmField
-    val VERDROOT = compostableBlockItem("verdroot", CobblemonBlocks.VERDROOT, 0.85f)
-    @JvmField
-    val MISTLEAF = compostableBlockItem("mistleaf", CobblemonBlocks.MISTLEAF, 0.85f)
-    @JvmField
-    val LUCIBELL = compostableBlockItem("lucibell", CobblemonBlocks.LUCIBELL, 0.85f)
-
     private fun blockItem(name: String, block: Block, rarity: Rarity = Rarity.COMMON): BlockItem = this.create(name, BlockItem(block, Item.Properties().rarity(rarity)))
 
     private fun itemNameBlockItem(name: String, block: Block, rarity: Rarity = Rarity.COMMON): ItemNameBlockItem = this.create(name, ItemNameBlockItem(block, Item.Properties().rarity(rarity)))
@@ -1779,6 +1762,4 @@ object CobblemonItems : PlatformRegistry<Registry<Item>, ResourceKey<Registry<It
     private fun foodItem(nutrition: Int, saturationModifier: Float): Item {
         return CobblemonItem(Item.Properties().food(FoodProperties.Builder().nutrition(nutrition).saturationModifier(saturationModifier).build()))
     }
-
-    private fun glowItem(name: String, block: Block): GlowItem  = this.create(name, GlowItem(block, Item.Properties()))
 }

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonMenuType.kt

@@ -10,6 +10,7 @@ package com.cobblemon.mod.common
 
 
 import com.cobblemon.mod.common.block.campfirepot.CookingPotMenu
+import com.cobblemon.mod.common.api.molangui.container.MolangContainerMenu
 import com.cobblemon.mod.common.block.tmmachine.TMMachineMenu
 import com.cobblemon.mod.common.platform.PlatformRegistry
 import net.minecraft.core.Registry
@@ -22,9 +23,10 @@ object CobblemonMenuType : PlatformRegistry<Registry<MenuType<*>>, ResourceKey<R
 
     val COOKING_POT = MenuType.register("cooking_pot_menu", ::CookingPotMenu)
     val TM_MACHINE = MenuType.register("tm_machine_menu", ::TMMachineMenu)
+    val MOLANG_UI = MenuType.register("molang_ui", ::MolangContainerMenu)
 
     override val registry: Registry<MenuType<*>>
         get() = BuiltInRegistries.MENU
     override val resourceKey: ResourceKey<Registry<MenuType<*>>>
         get() = Registries.MENU
-}
+}

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonNetwork.kt

@@ -32,6 +32,10 @@ import com.cobblemon.mod.common.client.net.effect.SpawnSnowstormParticleHandler
 import com.cobblemon.mod.common.client.net.gui.ExpGainedDataPacketHandler
 import com.cobblemon.mod.common.client.net.gui.InteractPokemonUIPacketHandler
 import com.cobblemon.mod.common.client.net.gui.PokedexUIPacketHandler
+import com.cobblemon.mod.common.client.net.molangui.MolangUiCloseHandler
+import com.cobblemon.mod.common.client.net.molangui.MolangUiCompatibilityRequestHandler
+import com.cobblemon.mod.common.client.net.molangui.MolangUiOpenHandler
+import com.cobblemon.mod.common.client.net.molangui.MolangUiUpdateHandler
 import com.cobblemon.mod.common.client.net.gui.SetActiveTMPacketHandler
 import com.cobblemon.mod.common.client.net.gui.SetTMMachineContainerDataPacketHandler
 import com.cobblemon.mod.common.client.net.gui.SummaryUIPacketHandler
@@ -83,6 +87,10 @@ import com.cobblemon.mod.common.net.messages.client.callback.OpenPartyMoveCallba
 import com.cobblemon.mod.common.net.messages.client.cooking.SeasoningRegistrySyncPacket
 import com.cobblemon.mod.common.net.messages.client.cooking.ToggleCookingPotLidPacket
 import com.cobblemon.mod.common.net.messages.client.data.*
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiClosePacket
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiCompatibilityRequestPacket
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiOpenPacket
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiUpdatePacket
 import com.cobblemon.mod.common.net.messages.client.debug.RequestOpenRidingStatsDebugGUIPacket
 import com.cobblemon.mod.common.net.messages.client.dialogue.DialogueClosedPacket
 import com.cobblemon.mod.common.net.messages.client.dialogue.DialogueOpenedPacket
@@ -180,6 +188,9 @@ import com.cobblemon.mod.common.net.messages.server.dialogue.EscapeDialoguePacke
 import com.cobblemon.mod.common.net.messages.server.dialogue.InputToDialoguePacket
 import com.cobblemon.mod.common.net.messages.server.habitat.SaveHabitatBlockSettingsPacket
 import com.cobblemon.mod.common.net.messages.server.npc.SaveNPCPacket
+import com.cobblemon.mod.common.net.messages.server.molangui.MolangUiActionPacket
+import com.cobblemon.mod.common.net.messages.server.molangui.MolangUiClosedPacket
+import com.cobblemon.mod.common.net.messages.server.molangui.MolangUiCompatibilityResponsePacket
 import com.cobblemon.mod.common.net.messages.server.orientation.ServerboundUpdateOrientationPacket
 import com.cobblemon.mod.common.net.messages.server.pasture.PasturePokemonPacket
 import com.cobblemon.mod.common.net.messages.server.pasture.SetPastureConflictPacket
@@ -239,6 +250,9 @@ import com.cobblemon.mod.common.net.serverhandling.dialogue.InputToDialogueHandl
 import com.cobblemon.mod.common.net.serverhandling.evolution.AcceptEvolutionHandler
 import com.cobblemon.mod.common.net.serverhandling.habitat.SaveHabitatBlockSettingsHandler
 import com.cobblemon.mod.common.net.serverhandling.npc.SaveNPCHandler
+import com.cobblemon.mod.common.net.serverhandling.molangui.MolangUiActionHandler
+import com.cobblemon.mod.common.net.serverhandling.molangui.MolangUiClosedHandler
+import com.cobblemon.mod.common.net.serverhandling.molangui.MolangUiCompatibilityResponseHandler
 import com.cobblemon.mod.common.net.serverhandling.orientation.ServerboundUpdateOrientationHandler
 import com.cobblemon.mod.common.net.serverhandling.pasture.PasturePokemonHandler
 import com.cobblemon.mod.common.net.serverhandling.pasture.SetPastureConflictHandler
@@ -425,7 +439,6 @@ object CobblemonNetwork {
         list.add(PacketRegisterInfo(MovesRegistrySyncPacket.ID, MovesRegistrySyncPacket::decode, DataRegistrySyncPacketHandler()))
         list.add(PacketRegisterInfo(BerryRegistrySyncPacket.ID, BerryRegistrySyncPacket::decode, DataRegistrySyncPacketHandler()))
         list.add(PacketRegisterInfo(SpeciesRegistrySyncPacket.ID, SpeciesRegistrySyncPacket::decode, DataRegistrySyncPacketHandler()))
-        list.add(PacketRegisterInfo(DexEvolutionDisplaySyncPacket.ID, DexEvolutionDisplaySyncPacket::decode, DataRegistrySyncPacketHandler()))
         list.add(PacketRegisterInfo(PropertiesCompletionRegistrySyncPacket.ID, PropertiesCompletionRegistrySyncPacket::decode, DataRegistrySyncPacketHandler()))
         list.add(PacketRegisterInfo(StandardSpeciesFeatureSyncPacket.ID, StandardSpeciesFeatureSyncPacket::decode, DataRegistrySyncPacketHandler()))
         list.add(PacketRegisterInfo(GlobalSpeciesFeatureSyncPacket.ID, GlobalSpeciesFeatureSyncPacket::decode, DataRegistrySyncPacketHandler()))
@@ -446,6 +459,11 @@ object CobblemonNetwork {
         list.add(PacketRegisterInfo(RideSettingsSyncPacket.ID, RideSettingsSyncPacket::decode, RideSettingsSyncHandler))
         list.add(PacketRegisterInfo(TechnicalMachineRegistrySyncPacket.ID, TechnicalMachineRegistrySyncPacket::decode, DataRegistrySyncPacketHandler()))
 
+        list.add(PacketRegisterInfo(MolangUiOpenPacket.ID, MolangUiOpenPacket::decode, MolangUiOpenHandler))
+        list.add(PacketRegisterInfo(MolangUiClosePacket.ID, MolangUiClosePacket::decode, MolangUiCloseHandler))
+        list.add(PacketRegisterInfo(MolangUiUpdatePacket.ID, MolangUiUpdatePacket::decode, MolangUiUpdateHandler))
+        list.add(PacketRegisterInfo(MolangUiCompatibilityRequestPacket.ID, MolangUiCompatibilityRequestPacket::decode, MolangUiCompatibilityRequestHandler))
+
         // Effects
         list.add(PacketRegisterInfo(SpawnSnowstormParticlePacket.ID, SpawnSnowstormParticlePacket::decode, SpawnSnowstormParticleHandler))
         list.add(PacketRegisterInfo(SpawnSnowstormEntityParticlePacket.ID, SpawnSnowstormEntityParticlePacket::decode, SpawnSnowstormEntityParticleHandler))
@@ -566,7 +584,6 @@ object CobblemonNetwork {
         list.add(PacketRegisterInfo(SwapPartyPokemonPacket.ID, SwapPartyPokemonPacket::decode, SwapPartyPokemonHandler))
 
         list.add(PacketRegisterInfo(MovePCPokemonPacket.ID, MovePCPokemonPacket::decode, MovePCPokemonHandler))
-        list.add(PacketRegisterInfo(MovePCPokemonBatchPacket.ID, MovePCPokemonBatchPacket::decode, MovePCPokemonBatchHandler))
         list.add(PacketRegisterInfo(MovePartyPokemonPacket.ID, MovePartyPokemonPacket::decode, MovePartyPokemonHandler))
 
         list.add(PacketRegisterInfo(SwapPCPartyPokemonPacket.ID, SwapPCPartyPokemonPacket::decode, SwapPCPartyPokemonHandler))
@@ -645,6 +662,10 @@ object CobblemonNetwork {
         list.add(PacketRegisterInfo(SetEntityBehaviourPacket.ID, SetEntityBehaviourPacket::decode, SetEntityBehaviourHandler))
         list.add(PacketRegisterInfo(DamageOnCollisionPacket.ID, DamageOnCollisionPacket::decode, DamageOnCollisionPacketHandler))
 
+        list.add(PacketRegisterInfo(MolangUiActionPacket.ID, MolangUiActionPacket::decode, MolangUiActionHandler))
+        list.add(PacketRegisterInfo(MolangUiClosedPacket.ID, MolangUiClosedPacket::decode, MolangUiClosedHandler))
+        list.add(PacketRegisterInfo(MolangUiCompatibilityResponsePacket.ID, MolangUiCompatibilityResponsePacket::decode, MolangUiCompatibilityResponseHandler))
+
         // Habitat blocks
         list.add(PacketRegisterInfo(SaveHabitatBlockSettingsPacket.ID, SaveHabitatBlockSettingsPacket::decode, SaveHabitatBlockSettingsHandler))
 
@@ -658,4 +679,4 @@ object CobblemonNetwork {
     fun sendPacketToPlayer(player: ServerPlayer, packet: NetworkPacket<*>) {
         Cobblemon.implementation.networkManager.sendPacketToPlayer(player, packet)
     }
-}
+}

common/src/main/kotlin/com/cobblemon/mod/common/CobblemonSounds.kt

@@ -148,9 +148,6 @@ object CobblemonSounds : PlatformRegistry<Registry<SoundEvent>, ResourceKey<Regi
     @JvmField
     val MONITOR_GLITCHING = this.create("block.monitor.glitching")
 
-    @JvmField
-    val BRIGHT_POWDER_USE = this.create("block.bright_powder.use")
-
     @JvmField
     val FOSSIL_MACHINE_ACTIVATE = this.create("block.fossil_machine.activate")
     @JvmField
@@ -660,95 +657,5 @@ object CobblemonSounds : PlatformRegistry<Registry<SoundEvent>, ResourceKey<Regi
         SoundEvents.WOOL_FALL
     )
 
-    @JvmField
-    val ITEM_BLOCK_POWDER_PLACE = this.create("block.item_block.powder.place")
-    @JvmField
-    val ITEM_BLOCK_POWDER_BREAK = this.create("block.item_block.powder.break")
-    @JvmField
-    val ITEM_BLOCK_POWDER_STEP = this.create("block.item_block.powder.step")
-    @JvmField
-    val ITEM_BLOCK_POWDER_SOUNDS = SoundType(1f, 1.1f,
-        ITEM_BLOCK_POWDER_BREAK,
-        ITEM_BLOCK_POWDER_STEP,
-        ITEM_BLOCK_POWDER_PLACE,
-        ITEM_BLOCK_POWDER_STEP,
-        ITEM_BLOCK_POWDER_STEP
-    )
-
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_LIQUID_PLACE = this.create("block.item_block.bottle_liquid.place")
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_LIQUID_BREAK = this.create("block.item_block.bottle_liquid.break")
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_LIQUID_STEP = this.create("block.item_block.bottle_liquid.step")
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_LIQUID_SOUNDS = SoundType(1f, 1.1f,
-        ITEM_BLOCK_BOTTLE_LIQUID_BREAK,
-        ITEM_BLOCK_BOTTLE_LIQUID_STEP,
-        ITEM_BLOCK_BOTTLE_LIQUID_PLACE,
-        ITEM_BLOCK_BOTTLE_LIQUID_PLACE,
-        ITEM_BLOCK_BOTTLE_LIQUID_PLACE
-    )
-
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_PILLS_PLACE = this.create("block.item_block.bottle_pills.place")
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_PILLS_BREAK = this.create("block.item_block.bottle_pills.break")
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_PILLS_STEP = this.create("block.item_block.bottle_pills.step")
-    @JvmField
-    val ITEM_BLOCK_BOTTLE_PILLS_SOUNDS = SoundType(1f, 1.1f,
-        ITEM_BLOCK_BOTTLE_PILLS_BREAK,
-        ITEM_BLOCK_BOTTLE_PILLS_STEP,
-        ITEM_BLOCK_BOTTLE_PILLS_PLACE,
-        ITEM_BLOCK_BOTTLE_PILLS_PLACE,
-        ITEM_BLOCK_BOTTLE_PILLS_PLACE
-    )
-
-    @JvmField
-    val ITEM_BLOCK_DICE_PLACE = this.create("block.item_block.dice.place")
-    @JvmField
-    val ITEM_BLOCK_DICE_BREAK = this.create("block.item_block.dice.break")
-    @JvmField
-    val ITEM_BLOCK_DICE_STEP = this.create("block.item_block.dice.step")
-    @JvmField
-    val ITEM_BLOCK_DICE_SOUNDS = SoundType(1f, 1.1f,
-        ITEM_BLOCK_DICE_BREAK,
-        ITEM_BLOCK_DICE_STEP,
-        ITEM_BLOCK_DICE_PLACE,
-        ITEM_BLOCK_DICE_STEP,
-        ITEM_BLOCK_DICE_STEP
-    )
-
-    @JvmField
-    val ITEM_BLOCK_METAL_CAN_PLACE = this.create("block.item_block.metal_can.place")
-    @JvmField
-    val ITEM_BLOCK_METAL_CAN_BREAK = this.create("block.item_block.metal_can.break")
-    @JvmField
-    val ITEM_BLOCK_METAL_CAN_STEP = this.create("block.item_block.metal_can.step")
-    @JvmField
-    val ITEM_BLOCK_METAL_CAN_SOUNDS = SoundType(1f, 1.1f,
-        ITEM_BLOCK_METAL_CAN_BREAK,
-        ITEM_BLOCK_METAL_CAN_STEP,
-        ITEM_BLOCK_METAL_CAN_PLACE,
-        ITEM_BLOCK_METAL_CAN_STEP,
-        ITEM_BLOCK_METAL_CAN_STEP
-    )
-
-    @JvmField
-    val ITEM_BLOCK_JAR_GLASS_LIQUID_PLACE = this.create("block.item_block.jar_glass_liquid.place")
-    @JvmField
-    val ITEM_BLOCK_JAR_GLASS_LIQUID_BREAK = this.create("block.item_block.jar_glass_liquid.break")
-    @JvmField
-    val ITEM_BLOCK_JAR_GLASS_LIQUID_STEP = this.create("block.item_block.jar_glass_liquid.step")
-    @JvmField
-    val ITEM_BLOCK_JAR_GLASS_LIQUID_SOUNDS = SoundType(1f, 1.1f,
-        ITEM_BLOCK_JAR_GLASS_LIQUID_BREAK,
-        ITEM_BLOCK_JAR_GLASS_LIQUID_STEP,
-        ITEM_BLOCK_JAR_GLASS_LIQUID_PLACE,
-        ITEM_BLOCK_JAR_GLASS_LIQUID_STEP,
-        ITEM_BLOCK_JAR_GLASS_LIQUID_STEP
-    )
-
     private fun create(name: String): SoundEvent = this.create(name, SoundEvent.createVariableRangeEvent(cobblemonResource(name)))
 }

common/src/main/kotlin/com/cobblemon/mod/common/api/ai/config/task/HateEntityTaskConfig.kt

@@ -9,7 +9,6 @@
 package com.cobblemon.mod.common.api.ai.config.task
 
 import com.bedrockk.molang.Expression
-import com.cobblemon.mod.common.Cobblemon
 import com.cobblemon.mod.common.api.ai.BehaviourConfigurationContext
 import com.cobblemon.mod.common.api.ai.ExpressionOrEntityVariable
 import com.cobblemon.mod.common.api.molang.MoLangFunctions.asMostSpecificMoLangValue
@@ -18,7 +17,6 @@ import com.cobblemon.mod.common.util.asExpression
 import com.cobblemon.mod.common.util.mainThreadRuntime
 import com.cobblemon.mod.common.util.resolveBoolean
 import com.cobblemon.mod.common.util.withQueryValue
-import com.cobblemon.mod.common.world.gamerules.CobblemonGameRules
 import com.mojang.datafixers.util.Either
 import net.minecraft.world.entity.LivingEntity
 import net.minecraft.world.entity.ai.behavior.BehaviorControl
@@ -36,8 +34,6 @@ import net.minecraft.world.entity.ai.sensing.SensorType
 class HateEntityTaskConfig : SingleTaskConfig {
     val entityCondition: Expression = "true".asExpression()
     val range: ExpressionOrEntityVariable = Either.left("24".asExpression())
-    val chance: Float = Cobblemon.config.predationChance
-    private val coercedChance = chance.coerceIn(0f, 1f)
 
     override fun getVariables(entity: LivingEntity, behaviourConfigurationContext: BehaviourConfigurationContext) = emptyList<MoLangConfigVariable>()
     override fun createTask(
@@ -47,44 +43,24 @@ class HateEntityTaskConfig : SingleTaskConfig {
         val range = range.resolveFloat(behaviourConfigurationContext.runtime)
         behaviourConfigurationContext.addMemories(
             MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES,
-            MemoryModuleType.ANGRY_AT,
-            MemoryModuleType.ATTACK_TARGET
+            MemoryModuleType.ANGRY_AT
         )
         behaviourConfigurationContext.addSensors(SensorType.NEAREST_LIVING_ENTITIES)
         return BehaviorBuilder.create { instance ->
             instance.group(
                 instance.present(MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES),
-                instance.registered(MemoryModuleType.ANGRY_AT),
-                instance.registered(MemoryModuleType.ATTACK_TARGET),
-            ).apply(instance) { entities, angryAt, attackTarget ->
+                instance.registered(MemoryModuleType.ANGRY_AT)
+            ).apply(instance) { entities, angryAt ->
                 Trigger { world, entity, _ ->
-                    // bail if gamerule is disabled
-                    if (!world.gameRules.getBoolean(CobblemonGameRules.DO_POKEMON_PREDATION)) return@Trigger false
-                    val target = instance.get(entities).findClosest { hated ->
-                        mainThreadRuntime.withQueryValue("entity", hated.asMostSpecificMoLangValue())
+                    val target = instance.get(entities).findClosest {
+                        mainThreadRuntime.withQueryValue("entity", entity.asMostSpecificMoLangValue())
                         return@findClosest mainThreadRuntime.resolveBoolean(entityCondition)
                     }.orElse(null)
 
-                    var shouldTrigger = false
                     if (target != null && target.distanceTo(entity) <= range) {
-                        shouldTrigger = when {
-                            // set always attacking if activity chance is equal to 1.0
-                            coercedChance == 1f -> {
-                                angryAt.set(target.uuid)
-                                attackTarget.set(target)
-                                true
-                            }
-                            // roll the dice in other way
-                            coercedChance != 1f && world.random.nextFloat() < coercedChance -> {
-                                angryAt.set(target.uuid)
-                                attackTarget.set(target)
-                                true
-                            }
-                            // fallback to peaceful behavior in unattended cases
-                            else -> false
-                        }
+                        angryAt.set(target.uuid)
                     }
-                    return@Trigger shouldTrigger
+                    return@Trigger true
                 }
             }
         }

common/src/main/kotlin/com/cobblemon/mod/common/api/battles/model/BattleEndResult.kt

@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.battles.model
-
-/**
- * How a [PokemonBattle] came to an end.
- */
-enum class BattleEndResult {
-    /** One side defeated the other. */
-    VICTORY,
-    /** A wild Pokémon was captured, ending the battle. */
-    CAPTURE,
-    /** An actor forfeited, giving the victory to the other side. */
-    FORFEIT,
-    /** A player fled from a wild Pokémon. */
-    FLED,
-    /** The battle was stopped without a winner, such as by a command, a player disconnecting or an error. */
-    STOPPED
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/battles/model/PokemonBattle.kt

@@ -21,7 +21,6 @@ import com.cobblemon.mod.common.api.battles.model.actor.BattleActor
 import com.cobblemon.mod.common.api.battles.model.actor.EntityBackedBattleActor
 import com.cobblemon.mod.common.api.battles.model.actor.FleeableBattleActor
 import com.cobblemon.mod.common.api.events.CobblemonEvents
-import com.cobblemon.mod.common.api.events.battles.BattleEndedEvent
 import com.cobblemon.mod.common.api.events.battles.BattleFledEvent
 import com.cobblemon.mod.common.api.events.battles.BattleFleeAttemptEvent
 import com.cobblemon.mod.common.api.molang.MoLangFunctions.asMoLangValue
@@ -125,12 +124,6 @@ open class PokemonBattle(
     var winners = listOf<BattleActor>()
     var losers = listOf<BattleActor>()
     var ended = false
-    /** How the battle ended, or null if it hasn't ended yet. */
-    var endResult: BattleEndResult? = null
-    /** The actor that forfeited the battle, if any. */
-    var forfeitedBy: BattleActor? = null
-    /** Whether a player fled from the battle. */
-    var fled = false
     // TEMP battle showcase stuff
     var announcingRules = false
     var turn: Int = 0
@@ -239,10 +232,6 @@ open class PokemonBattle(
     }
 
     fun writeShowdownAction(vararg messages: String) {
-        if (messages.any { it.contains("\n") || it.contains("\r") }) {
-            LOGGER.warn("Refusing to forward Showdown action with an embedded line break for battle {}: {}", battleId, messages.joinToString(" | "))
-            return
-        }
         log(messages.joinToString("\n"))
         ShowdownService.service.send(battleId, messages.toList().toTypedArray())
     }
@@ -262,14 +251,6 @@ open class PokemonBattle(
 
     fun end() {
         ended = true
-        val result = when {
-            winners.isNotEmpty() && showdownMessages.any { "capture" in it } -> BattleEndResult.CAPTURE
-            winners.isNotEmpty() && forfeitedBy != null -> BattleEndResult.FORFEIT
-            winners.isNotEmpty() -> BattleEndResult.VICTORY
-            fled -> BattleEndResult.FLED
-            else -> BattleEndResult.STOPPED
-        }
-        endResult = result
         val awardToFainted = Cobblemon.config.awardExperienceToFaintedPokemon
         val awardOnLoss = Cobblemon.config.awardExperienceOnBattleLoss
         this.actors.forEach { actor ->
@@ -351,7 +332,6 @@ open class PokemonBattle(
                 }
             }
         }
-        CobblemonEvents.BATTLE_ENDED.post(BattleEndedEvent(this, result, forfeitedBy.takeIf { result == BattleEndResult.FORFEIT }))
         sendUpdate(BattleEndPacket())
         BattleRegistry.closeBattle(this)
     }
@@ -522,7 +502,6 @@ open class PokemonBattle(
                 .forEach{it.pokemon.heal()}
             CobblemonEvents.BATTLE_FLED.post(BattleFledEvent(this, actors.asSequence().filterIsInstance<PlayerBattleActor>().iterator().next()))
             actors.filterIsInstance<EntityBackedBattleActor<*>>().mapNotNull { it.entity }.forEach { it.sendSystemMessage(battleLang("flee").yellow()) }
-            fled = true
             stop()
         }
     }
@@ -560,7 +539,6 @@ open class PokemonBattle(
     private fun checkForfeit(): Boolean {
         val forfeit = actors.find { it.responses.any { it is ForfeitActionResponse } }
         return forfeit?.let {
-            forfeitedBy = it
             this.dispatchWaiting { this.broadcastChatMessage(battleLang("forfeit", it.getName()).red()) }
             writeShowdownAction(">forcelose ${it.showdownId}")
             true

common/src/main/kotlin/com/cobblemon/mod/common/api/data/ServerJsonDataRegistry.kt

@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.data
-
-import com.cobblemon.mod.common.util.endsWith
-import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
-import net.minecraft.core.HolderLookup
-import java.io.BufferedReader
-import java.io.File
-import java.util.concurrent.ExecutionException
-import net.minecraft.resources.ResourceLocation
-import net.minecraft.server.packs.PackType
-import net.minecraft.server.packs.resources.ResourceManager
-
-/**
- * A [DataRegistry] that consumes JSON files.
- * Every deserialized instance is attached to an [Identifier].
- * For example a file under data/mymod/[resourcePath]/entry.json would be backed by the identifier modid:entry.
- *
- * @param T The type of the data consumed by this registry.
- *
- * @author Licious
- * @since August 5th, 2022
- */
-interface ServerJsonDataRegistry<T> : DataRegistry {
-
-    /**
-     * The [TypeToken] of type [T].
-     */
-    val typeToken: TypeToken<T>
-
-    /**
-     * The folder location for the data this registry will consume.
-     */
-    val resourcePath: String
-
-    override val type: PackType
-        get() = PackType.SERVER_DATA
-
-    override fun reload(manager: ResourceManager) {
-        //NO-OP, handled by reload(manager, registry)
-    }
-
-    fun reload(manager: ResourceManager, registry: HolderLookup.Provider) {
-        val gson = setupParser(registry)
-        val data = hashMapOf<ResourceLocation, T>()
-        manager.listResources(resourcePath) { path -> path.endsWith(JSON_EXTENSION) }.forEach { (identifier, resource) ->
-            if (identifier.namespace == "pixelmon") {
-                return@forEach
-            }
-
-            resource.open().use { stream ->
-                stream.bufferedReader().use { reader ->
-                    val resolvedIdentifier = ResourceLocation.fromNamespaceAndPath(identifier.namespace, File(identifier.path).nameWithoutExtension)
-                    data[resolvedIdentifier] = parse(reader, resolvedIdentifier, gson)
-                }
-            }
-        }
-
-        reload(data, registry)
-    }
-
-    fun parse(reader: BufferedReader, identifier: ResourceLocation, gson: Gson): T {
-        return try {
-            gson.fromJson(reader, typeToken.type)
-        } catch (exception: Exception) {
-            throw ExecutionException("Error loading JSON for data: $identifier", exception)
-        }
-    }
-
-    /**
-     * Allows the creation of [Gson] instances which have adapters that are registry-aware, e.g. [com.cobblemon.mod.common.pokemon.evolution.adapters.LegacyItemConditionWrapperAdapter]
-     */
-    fun setupParser(registry: HolderLookup.Provider): Gson
-
-    /**
-     * Reloads this registry from the deserialized data.
-     *
-     * @param data A map of the data associating an instance to the respective identifier from the [ResourceManager].
-     */
-    fun reload(data: Map<ResourceLocation, T>, registry: HolderLookup.Provider)
-
-    companion object {
-        const val JSON_EXTENSION = ".json"
-    }
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/events/CobblemonEvents.kt

@@ -12,7 +12,6 @@ import com.cobblemon.mod.common.api.events.battles.BattleFaintedEvent
 import com.cobblemon.mod.common.api.events.battles.BattleFledEvent
 import com.cobblemon.mod.common.api.events.battles.BattleFleeAttemptEvent
 import com.cobblemon.mod.common.api.events.battles.BattleStartedEvent
-import com.cobblemon.mod.common.api.events.battles.BattleEndedEvent
 import com.cobblemon.mod.common.api.events.battles.BattleVictoryEvent
 import com.cobblemon.mod.common.api.events.battles.instruction.FormeChangeEvent
 import com.cobblemon.mod.common.api.events.battles.instruction.MegaEvolutionEvent
@@ -140,9 +139,6 @@ object CobblemonEvents {
     @JvmField
     val BATTLE_FAINTED = EventObservable<BattleFaintedEvent>()
 
-    @JvmField
-    val BATTLE_ENDED = EventObservable<BattleEndedEvent>()
-
     // instructions
     @JvmField
     val MEGA_EVOLUTION = EventObservable<MegaEvolutionEvent>()

common/src/main/kotlin/com/cobblemon/mod/common/api/events/battles/BattleEndedEvent.kt

@@ -1,69 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.events.battles
-
-import com.bedrockk.molang.runtime.value.DoubleValue
-import com.bedrockk.molang.runtime.value.MoValue
-import com.bedrockk.molang.runtime.value.StringValue
-import com.cobblemon.mod.common.api.battles.model.BattleEndResult
-import com.cobblemon.mod.common.api.battles.model.PokemonBattle
-import com.cobblemon.mod.common.api.battles.model.actor.BattleActor
-import com.cobblemon.mod.common.api.battles.model.actor.ActorType
-import com.cobblemon.mod.common.util.asArrayValue
-
-/**
- * Event fired whenever a [PokemonBattle] ends, regardless of how it ended (victory, fleeing, being stopped, etc).
- *
- * [PokemonBattle.winners] and [PokemonBattle.losers] are only populated if the [result] has a winner,
- * that is [BattleEndResult.VICTORY], [BattleEndResult.CAPTURE] or [BattleEndResult.FORFEIT].
- *
- * @param result How the battle ended.
- * @param forfeitedBy The actor that forfeited, if the [result] is [BattleEndResult.FORFEIT].
- */
-data class BattleEndedEvent(
-    override val battle: PokemonBattle,
-    val result: BattleEndResult,
-    val forfeitedBy: BattleActor?
-) : BattleEvent {
-    /** Whether one side won the battle, which includes captures and forfeits. */
-    val hasWinner = battle.winners.isNotEmpty()
-    val wasVictory = result == BattleEndResult.VICTORY
-    val wasCapture = result == BattleEndResult.CAPTURE
-    val wasForfeit = result == BattleEndResult.FORFEIT
-    val wasFled = result == BattleEndResult.FLED
-    val wasStopped = result == BattleEndResult.STOPPED
-
-    /** Whether the battle was between players and wild Pokémon. */
-    val isPvW = battle.isPvW
-    /** Whether the battle was between players and NPCs. */
-    val isPvN = battle.isPvN
-    /** Whether the battle was between players. */
-    val isPvP = battle.isPvP
-
-    val context = mutableMapOf<String, MoValue>(
-        "battle" to battle.struct,
-        "result" to StringValue(result.name.lowercase()),
-        "has_winner" to DoubleValue(hasWinner),
-        "was_victory" to DoubleValue(wasVictory),
-        "was_capture" to DoubleValue(wasCapture),
-        "was_forfeit" to DoubleValue(wasForfeit),
-        "was_fled" to DoubleValue(wasFled),
-        "was_stopped" to DoubleValue(wasStopped),
-        "is_pvw" to DoubleValue(isPvW),
-        "is_pvn" to DoubleValue(isPvN),
-        "is_pvp" to DoubleValue(isPvP),
-        "winners" to battle.winners.asArrayValue { it.struct },
-        "losers" to battle.losers.asArrayValue { it.struct },
-        "players" to battle.actors.filter { it.type == ActorType.PLAYER }.asArrayValue { it.struct },
-        "npcs" to battle.actors.filter { it.type == ActorType.NPC }.asArrayValue { it.struct },
-        "wild_pokemon" to battle.actors.filter { it.type == ActorType.WILD }.asArrayValue { it.struct }
-    ).apply {
-        forfeitedBy?.let { put("forfeited_by", it.struct) }
-    }
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/fossil/Fossils.kt

@@ -40,7 +40,7 @@ object Fossils: JsonDataRegistry<Fossil> {
         .registerTypeAdapter(ResourceLocation::class.java, IdentifierAdapter)
         .registerTypeAdapter(PokemonProperties::class.java, pokemonPropertiesShortAdapter)
         .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Item::class.java).type, ItemLikeConditionAdapter)
-        .registerTypeAdapter(ItemPredicate::class.java, LegacyItemConditionWrapperAdapter())
+        .registerTypeAdapter(ItemPredicate::class.java, LegacyItemConditionWrapperAdapter)
         .create()
 
     override val typeToken: TypeToken<Fossil> = TypeToken.get(Fossil::class.java)

common/src/main/kotlin/com/cobblemon/mod/common/api/gui/ParentWidget.kt

@@ -10,6 +10,7 @@ package com.cobblemon.mod.common.api.gui
 
 import com.cobblemon.mod.common.client.gui.CobblemonRenderable
 import net.minecraft.client.gui.components.AbstractWidget
+import net.minecraft.client.gui.components.Renderable
 import net.minecraft.client.gui.components.events.GuiEventListener
 import net.minecraft.client.gui.narration.NarrationElementOutput
 import net.minecraft.network.chat.Component
@@ -54,8 +55,6 @@ abstract class ParentWidget(
     }
 
     override fun mouseClicked(pMouseX: Double, pMouseY: Double, pButton: Int): Boolean {
-        if (!active) return false
-
         return children.any {
             it.mouseClicked(pMouseX, pMouseY, pButton)
         }

common/src/main/kotlin/com/cobblemon/mod/common/api/gui/TreeDrawingUtils.kt

@@ -1,116 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.gui
-
-import kotlin.math.max
-import kotlin.math.min
-
-interface TreeNode<T> {
-    val children: List<TreeNode<T>>
-}
-
-class TreeDrawingNode<T>(
-    val value: T,
-    val children: List<TreeDrawingNode<T>>,
-) {
-    var x = 0
-    var y = 0
-    var offset = 0
-}
-
-fun <T> createDrawingTree(treeNode: TreeNode<T>): TreeDrawingNode<T> {
-    val root = setup(treeNode, 0, mutableListOf<Int>(), mutableListOf<Int>())
-    addMods(root, 0)
-
-    return root
-}
-
-@Suppress("UNCHECKED_CAST")
-private fun <T> setup(
-    treeNode: TreeNode<T>,
-    depth: Int,
-    nexts: MutableList<Int>,
-    offset: MutableList<Int>,
-): TreeDrawingNode<T> {
-    val children = treeNode.children.map { child ->
-        setup(child, depth + 1, nexts, offset)
-    }
-
-    val treeDrawingNode = TreeDrawingNode<T>(treeNode as T, children)
-    treeDrawingNode.y = depth
-
-    while (nexts.size <= depth) {
-        nexts.add(0)
-    }
-
-    while (offset.size <= depth) {
-        offset.add(0)
-    }
-
-    var place =
-        if (children.isEmpty()) {
-            nexts[depth]
-        } else if (children.size == 1) {
-//            children.first().x - 1
-            children.first().x
-        } else {
-//            (children[0].x + children[1].x) / 2
-            (children.first().x + children.last().x) / 2
-        }
-
-    offset[depth] = max(offset[depth], nexts[depth] - place)
-
-    if (children.isEmpty()) {
-        treeDrawingNode.x = place
-    } else {
-        treeDrawingNode.x = place + offset[depth]
-    }
-
-    nexts[depth] += 2
-    treeDrawingNode.offset = offset[depth]
-
-    return treeDrawingNode
-}
-
-private fun <T> addMods(
-    treeNode: TreeDrawingNode<T>,
-    modSum: Int,
-) {
-    treeNode.x += modSum
-    val newModSum = modSum + treeNode.offset
-
-    treeNode.children.forEach { child ->
-        addMods(child, newModSum)
-    }
-}
-
-data class TreeDrawingBounds(val minX: Int, val maxX: Int, val minY: Int, val maxY: Int) {
-    val width = maxX - minX
-    val height = maxY - minY
-    val xCenter = (maxX + minX) / 2.0
-    val yCenter = (maxY + minY) / 2.0
-}
-
-fun <T> calculateBounds(treeDrawingNode: TreeDrawingNode<T>): TreeDrawingBounds {
-    var minX = treeDrawingNode.x
-    var maxX = treeDrawingNode.x
-    var minY = treeDrawingNode.y
-    var maxY = treeDrawingNode.y
-
-    for (child in treeDrawingNode.children) {
-        val childBounds = calculateBounds(child)
-
-        minX = min(minX, childBounds.minX)
-        maxX = max(maxX, childBounds.maxX)
-        minY = min(minY, childBounds.minY)
-        maxY = max(maxY, childBounds.maxY)
-    }
-
-    return TreeDrawingBounds(minX, maxX, minY, maxY)
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/interaction/PokemonInteractions.kt

@@ -10,7 +10,7 @@ package com.cobblemon.mod.common.api.interaction
 
 import com.cobblemon.mod.common.Cobblemon
 import com.cobblemon.mod.common.api.conditional.RegistryLikeCondition
-import com.cobblemon.mod.common.api.data.ServerJsonDataRegistry
+import com.cobblemon.mod.common.api.data.JsonDataRegistry
 import com.cobblemon.mod.common.api.molang.ExpressionLike
 import com.cobblemon.mod.common.api.pokemon.PokemonProperties
 import com.cobblemon.mod.common.api.pokemon.requirement.Requirement
@@ -26,7 +26,6 @@ import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import com.google.gson.reflect.TypeToken
 import net.minecraft.advancements.critereon.ItemPredicate
-import net.minecraft.core.HolderLookup
 import net.minecraft.resources.ResourceLocation
 import net.minecraft.server.level.ServerPlayer
 import net.minecraft.server.packs.PackType
@@ -37,31 +36,28 @@ import net.minecraft.world.level.block.Block
 import net.minecraft.world.level.levelgen.structure.Structure
 import net.minecraft.world.level.material.Fluid
 
-object PokemonInteractions : ServerJsonDataRegistry<PokemonInteractionSet> {
+object PokemonInteractions : JsonDataRegistry<PokemonInteractionSet> {
     override val id = cobblemonResource("pokemon_interactions")
     override val type = PackType.SERVER_DATA
-    override fun setupParser(registry: HolderLookup.Provider): Gson {
-        return GsonBuilder()
-            .registerTypeAdapter(ResourceLocation::class.java, IdentifierAdapter)
-            .registerTypeAdapter(PokemonProperties::class.java, pokemonPropertiesShortAdapter)
-            .registerTypeAdapter(ItemPredicate::class.java, LegacyItemConditionWrapperAdapter(registry))
-            .registerTypeAdapter(Requirement::class.java, CobblemonRequirementAdapter)
-            .registerTypeAdapter(InteractionEffect::class.java, InteractionEffectAdapter)
-            .registerTypeAdapter(ExpressionLike::class.java, ExpressionLikeAdapter)
-            .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Biome::class.java).type, BiomeLikeConditionAdapter)
-            .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Block::class.java).type, BlockLikeConditionAdapter)
-            .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Item::class.java).type, ItemLikeConditionAdapter)
-            .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Structure::class.java).type, StructureLikeConditionAdapter)
-            .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Fluid::class.java).type, FluidLikeConditionAdapter)
-            .registerTypeAdapter(IntRange::class.java, IntRangeAdapter)
-            .registerTypeAdapterFactory(LowerCaseEnumTypeAdapterFactory())
-            .setPrettyPrinting()
-            .create()
-    }
-
     override val observable = SimpleObservable<PokemonInteractions>()
     override val typeToken: TypeToken<PokemonInteractionSet> = TypeToken.get(PokemonInteractionSet::class.java)
     override val resourcePath = "pokemon_interactions"
+    override val gson: Gson = GsonBuilder()
+        .registerTypeAdapter(ResourceLocation::class.java, IdentifierAdapter)
+        .registerTypeAdapter(PokemonProperties::class.java, pokemonPropertiesShortAdapter)
+        .registerTypeAdapter(ItemPredicate::class.java, LegacyItemConditionWrapperAdapter)
+        .registerTypeAdapter(Requirement::class.java, CobblemonRequirementAdapter)
+        .registerTypeAdapter(InteractionEffect::class.java, InteractionEffectAdapter)
+        .registerTypeAdapter(ExpressionLike::class.java, ExpressionLikeAdapter)
+        .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Biome::class.java).type, BiomeLikeConditionAdapter)
+        .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Block::class.java).type, BlockLikeConditionAdapter)
+        .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Item::class.java).type, ItemLikeConditionAdapter)
+        .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Structure::class.java).type, StructureLikeConditionAdapter)
+        .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Fluid::class.java).type, FluidLikeConditionAdapter)
+        .registerTypeAdapter(IntRange::class.java, IntRangeAdapter)
+        .registerTypeAdapterFactory(LowerCaseEnumTypeAdapterFactory())
+        .setPrettyPrinting()
+        .create()
 
     val interactions = mutableListOf<PokemonInteractionSet>()
 
@@ -69,7 +65,7 @@ object PokemonInteractions : ServerJsonDataRegistry<PokemonInteractionSet> {
         PokemonInteractionsSyncPacket(interactions).sendToPlayer(player)
     }
 
-    override fun reload(data: Map<ResourceLocation, PokemonInteractionSet>, registry: HolderLookup.Provider) {
+    override fun reload(data: Map<ResourceLocation, PokemonInteractionSet>) {
         interactions.clear()
         val split = data.entries
             .partition {
@@ -91,4 +87,4 @@ object PokemonInteractions : ServerJsonDataRegistry<PokemonInteractionSet> {
             .flatMap { it.interactions }
             .firstOrNull(interactionCheck)
     }
-}
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molang/function/BattleActorMoLangFunctions.kt

@@ -16,7 +16,6 @@ import com.cobblemon.mod.common.api.molang.MoLangFunctions.asMoLangValue
 import com.cobblemon.mod.common.battles.actor.PlayerBattleActor
 import com.cobblemon.mod.common.battles.actor.PokemonBattleActor
 import com.cobblemon.mod.common.entity.npc.NPCBattleActor
-import com.cobblemon.mod.common.util.asArrayValue
 
 object BattleActorMoLangFunctions : AbstractMoLangFunctionHolder<BattleActor>() {
     override fun BattleActor.moLangFunctions(): MutableMap<String, (MoParams) -> Any> {
@@ -26,7 +25,6 @@ object BattleActorMoLangFunctions : AbstractMoLangFunctionHolder<BattleActor>()
         functions["is_npc"] = { DoubleValue(actor.type == ActorType.NPC) }
         functions["is_player"] = { DoubleValue(actor.type == ActorType.PLAYER) }
         functions["is_wild"] = { DoubleValue(actor.type == ActorType.WILD) }
-        functions["battle_pokemon"] = { actor.pokemonList.asArrayValue { it.struct } }
 
         when (actor) {
             is NPCBattleActor -> {

common/src/main/kotlin/com/cobblemon/mod/common/api/molang/function/GeneralMoLangFunctions.kt

@@ -45,6 +45,11 @@ object GeneralMoLangFunctions {
     val functions: MutableMap<String, (MoParams) -> Any> = mutableMapOf()
 
     init {
+        functions["format"] = { params ->
+            val value = params.get<MoValue>(0).asDouble()
+            val decimals = params.get<MoValue>(1).asDouble().toInt().coerceIn(0, 10)
+            StringValue(String.format("%.${decimals}f", value))
+        }
         functions["print"] = { params ->
             val message = params.get<MoValue>(0).asString()
             LOGGER.info(message)
@@ -55,11 +60,6 @@ object GeneralMoLangFunctions {
             struct.map.remove(variable)
             DoubleValue.ONE
         }
-        functions["delete_variables"] = { params ->
-            val struct = params.get<VariableStruct>(0)
-            struct.map.clear()
-            DoubleValue.ONE
-        }
         functions["get_variable"] = { params ->
             val struct = params.get<VariableStruct>(0)
             val variable = params.getString(1)

common/src/main/kotlin/com/cobblemon/mod/common/api/molang/function/LivingEntityMoLangFunctions.kt

@@ -98,14 +98,14 @@ object LivingEntityMoLangFunctions : AbstractMoLangFunctionHolder<LivingEntity>(
             val targetEntity = params.get<MoValue>(0)
             val maxDistance = params.getDoubleOrNull(1)?.toFloat() ?: 2.0F
 
-            val target =
+            val entity =
                 if (targetEntity is ObjectValue<*> && targetEntity.obj is Entity) {
                     targetEntity.obj as Entity
                 } else {
                     return@isLookingAt DoubleValue.ZERO
                 }
 
-            DoubleValue(entity.isLookingAt(target, maxDistance))
+            DoubleValue(entity.isLookingAt(entity, maxDistance))
         }
         functions["is_living_entity"] = { DoubleValue.ONE }
         functions["is_flying"] = { DoubleValue(entity.isFallFlying) }

common/src/main/kotlin/com/cobblemon/mod/common/api/molang/function/PokedexMoLangFunctions.kt

@@ -16,7 +16,6 @@ import com.cobblemon.mod.common.api.molang.ObjectValue
 import com.cobblemon.mod.common.api.pokedex.AbstractPokedexManager
 import com.cobblemon.mod.common.api.pokedex.CaughtCount
 import com.cobblemon.mod.common.api.pokedex.CaughtPercent
-import com.cobblemon.mod.common.api.pokedex.Dexes
 import com.cobblemon.mod.common.api.pokedex.PokedexEntryProgress
 import com.cobblemon.mod.common.api.pokedex.PokedexManager
 import com.cobblemon.mod.common.api.pokedex.SeenCount
@@ -75,27 +74,6 @@ object PokedexMoLangFunctions : AbstractMoLangFunctionHolder<AbstractPokedexMana
         functions["caught_percent"] = { DoubleValue(pokedex.getGlobalCalculatedValue(CaughtPercent)) }
         functions["seen_percent"] = { DoubleValue(pokedex.getGlobalCalculatedValue(SeenPercent)) }
 
-        functions["dex_caught_count"] = { params ->
-            val dexId = params.getString(0).asIdentifierDefaultingNamespace()
-            if (Dexes.dexEntryMap.containsKey(dexId)) DoubleValue(pokedex.getDexCalculatedValue(dexId, CaughtCount))
-            else DoubleValue.ZERO
-        }
-        functions["dex_seen_count"] = { params ->
-            val dexId = params.getString(0).asIdentifierDefaultingNamespace()
-            if (Dexes.dexEntryMap.containsKey(dexId)) DoubleValue(pokedex.getDexCalculatedValue(dexId, SeenCount))
-            else DoubleValue.ZERO
-        }
-        functions["dex_caught_percent"] = { params ->
-            val dexId = params.getString(0).asIdentifierDefaultingNamespace()
-            if (Dexes.dexEntryMap.containsKey(dexId)) DoubleValue(pokedex.getDexCalculatedValue(dexId, CaughtPercent).toDouble())
-            else DoubleValue.ZERO
-        }
-        functions["dex_seen_percent"] = { params ->
-            val dexId = params.getString(0).asIdentifierDefaultingNamespace()
-            if (Dexes.dexEntryMap.containsKey(dexId)) DoubleValue(pokedex.getDexCalculatedValue(dexId, SeenPercent).toDouble())
-            else DoubleValue.ZERO
-        }
-
         when (pokedex) {
             is PokedexManager -> {
                 functions["player_id"] = { StringValue(pokedex.uuid.toString()) }

common/src/main/kotlin/com/cobblemon/mod/common/api/molang/function/PokemonMoLangFunctions.kt

@@ -212,7 +212,7 @@ object PokemonMoLangFunctions : AbstractMoLangFunctionHolder<Pokemon>() {
         // Lol. Lmao, even.
         // TO-DO: Subscribe to [PokemonSpecies.observable].
         functions["pre_evolution"] = { pokemon.species.preEvolution ?: DoubleValue.ZERO }
-        functions["nature"] = { StringValue(pokemon.nature.name.toString()) }
+        functions["nature"] = { StringValue(pokemon.nature.toString()) }
         functions["is_wild"] = { DoubleValue(pokemon.entity?.let { it.ownerUUID == null } == true) }
         functions["is_shiny"] = { DoubleValue(pokemon.shiny) }
         functions["is_in_party"] = { DoubleValue(pokemon.storeCoordinates.get()?.store is PartyStore) }

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/GuiMode.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+enum class GuiMode {
+    OVERLAY,
+    SCREEN;
+
+    companion object {
+        fun fromString(value: String): GuiMode? = entries.firstOrNull { it.name.equals(value, ignoreCase = true) }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiActionRegistry.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.cobblemon.mod.common.api.scripting.CobblemonScripts
+import java.util.concurrent.ConcurrentHashMap
+
+object MolangUiActionRegistry {
+    private val handlers = ConcurrentHashMap<ActionKey, MolangUiActionHandler>()
+
+    fun register(key: ActionKey, handler: MolangUiActionHandler) {
+        check(handlers.putIfAbsent(key, handler) == null) { "Molang UI action '$key' is already registered" }
+    }
+
+    fun unregister(key: ActionKey): Boolean = handlers.remove(key) != null
+
+    internal fun dispatch(
+        session: MolangUiSession,
+        action: ActionKey,
+        parameters: Map<String, ParameterValue>
+    ) {
+        val definition = session.contract.actions[action]
+            ?: throw IllegalArgumentException("undeclared action '${action.value}'")
+        val registered = handlers[action]
+        if (registered != null) {
+            registered.handle(MolangUiActionContext(session, session.player, parameters))
+            return
+        }
+        val scriptId = definition.handler
+            ?: throw IllegalStateException("action '${action.value}' has no registered handler")
+        val script = CobblemonScripts.scripts[scriptId]
+            ?: throw IllegalStateException("Molang UI action script '$scriptId' was not loaded")
+        val runtime = MolangUiServerRuntimeFactory.create(session)
+        parameters.forEach { (name, value) -> runtime.environment.setSimpleVariable(name, value.asMoLangValue()) }
+        script.resolve(runtime, emptyMap())
+    }
+
+    internal fun executeOnOpen(session: MolangUiSession) {
+        val scriptId = session.contract.onOpen ?: return
+        val script = CobblemonScripts.scripts[scriptId]
+            ?: throw IllegalStateException("Molang UI on_open script '$scriptId' was not loaded")
+        script.resolve(MolangUiServerRuntimeFactory.create(session), emptyMap())
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiContractRegistry.kt

@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.google.gson.JsonArray
+import com.cobblemon.mod.common.api.data.DataRegistry
+import com.cobblemon.mod.common.api.molangui.container.CollectionConfig
+import com.cobblemon.mod.common.api.molangui.container.CollectionSource
+import com.cobblemon.mod.common.api.molangui.container.CloseItemsPolicy
+import com.cobblemon.mod.common.api.molangui.container.ItemFilterEntry
+import com.cobblemon.mod.common.api.molangui.container.ShiftClickRule
+import com.cobblemon.mod.common.api.molangui.container.SlotLayout
+import com.cobblemon.mod.common.api.reactive.SimpleObservable
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiCompatibilityRequestPacket
+import com.cobblemon.mod.common.util.cobblemonResource
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+import com.google.gson.JsonParser
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.core.registries.BuiltInRegistries
+import net.minecraft.server.level.ServerPlayer
+import net.minecraft.server.packs.PackType
+import net.minecraft.server.packs.resources.ResourceManager
+import com.cobblemon.mod.common.Cobblemon
+import java.util.concurrent.atomic.AtomicLong
+
+object MolangUiContractRegistry : DataRegistry {
+    override val id = cobblemonResource("molang_ui_contracts")
+    override val type = PackType.SERVER_DATA
+    override val observable = SimpleObservable<MolangUiContractRegistry>()
+    private val contracts = linkedMapOf<ResourceLocation, MolangUiContract>()
+    private val parseFailures = AtomicLong()
+    private const val DIRECTORY = "molang_ui"
+
+    override fun reload(manager: ResourceManager) {
+        val next = linkedMapOf<ResourceLocation, MolangUiContract>()
+        manager.listResources(DIRECTORY) { it.path.endsWith(".json") }.forEach { (location, resource) ->
+            val id = ResourceLocation.fromNamespaceAndPath(
+                location.namespace,
+                location.path.removePrefix("$DIRECTORY/").removeSuffix(".json")
+            )
+            try {
+                val json = resource.openAsReader().use { JsonParser.parseReader(it).asJsonObject }
+                next[id] = parse(id, json)
+            } catch (error: Exception) {
+                parseFailures.incrementAndGet()
+                Cobblemon.LOGGER.error("Rejected Molang UI contract '$location': ${error.message}")
+            }
+        }
+        require(next.size <= MolangUiPacketLimits.MAX_CONTRACTS) {
+            "Molang UI contract count exceeds ${MolangUiPacketLimits.MAX_CONTRACTS}"
+        }
+        contracts.clear()
+        contracts.putAll(next)
+        Cobblemon.LOGGER.info("Loaded ${contracts.size} validated Molang UI contracts")
+        observable.emit(this)
+    }
+
+    override fun sync(player: ServerPlayer) {
+        MolangUiCompatibilityRequestPacket(versions()).sendToPlayer(player)
+    }
+
+    internal fun parse(
+        id: ResourceLocation,
+        json: JsonObject,
+        itemExists: (ResourceLocation) -> Boolean = BuiltInRegistries.ITEM::containsKey
+    ): MolangUiContract {
+        require(!json.has("blocks_input")) { "blocks_input is unsupported; input handling is determined by mode" }
+        val formatVersion = json.get("format_version").requireUiInt("format_version")
+        require(formatVersion == MOLANG_UI_FORMAT_VERSION) { "unsupported format_version $formatVersion" }
+        val contractVersion = json.get("contract_version").requireUiString("contract_version")
+        MolangUiPacketLimits.requireIdentifier(contractVersion, "contract_version")
+        val mode = GuiMode.fromString(json.get("mode").requireUiString("mode"))
+            ?: throw IllegalArgumentException("unknown mode '${json.get("mode").asString}'")
+        val parameters = parseParameters(json.getAsJsonObject("parameters"))
+        val actions = parseActions(json.getAsJsonObject("actions"))
+        val collections = parseCollections(json.getAsJsonObject("collections"), itemExists)
+        val shiftRules = parseShiftRules(json.getAsJsonArray("shift_click_rules"), collections.keys)
+        val closePolicy = json.get("on_close_items")?.requireUiString("on_close_items")?.let { raw ->
+            CloseItemsPolicy.fromId(raw) ?: throw IllegalArgumentException("unknown on_close_items policy '$raw'")
+        } ?: CloseItemsPolicy.RETURN
+        return MolangUiContract(
+            id, formatVersion, contractVersion, mode, parameters, actions,
+            json.get("on_open")?.requireUiString("on_open")?.let { ResourceLocation.tryParse(it) ?: error("invalid on_open script id") },
+            collections, shiftRules, closePolicy,
+            json.get("exclusive")?.requireUiBoolean("exclusive") ?: false
+        )
+    }
+
+    private fun parseParameters(json: JsonObject?): Map<String, ParameterDefinition> {
+        require((json?.size() ?: 0) <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "too many parameters" }
+        return json?.entrySet()?.associate { (name, element) ->
+            MolangUiParameters.requireName(name)
+            val obj = element.asJsonObject
+            val type = ParameterType.fromId(obj.get("type").requireUiString("parameters.$name.type"))
+                ?: throw IllegalArgumentException("unknown type for parameter '$name'")
+            val default = obj.get("default")?.let { parseDefault(type, it, "parameters.$name.default") }
+            name to ParameterDefinition(type, obj.get("required")?.requireUiBoolean("parameters.$name.required") ?: (default == null), default)
+        }?.toMap() ?: emptyMap()
+    }
+
+    private fun parseDefault(type: ParameterType, element: JsonElement, path: String): ParameterDefault {
+        if (element.isJsonObject && element.asJsonObject.has("molang")) {
+            require(element.asJsonObject.size() == 1) { "expression '$path' contains unknown fields" }
+            return ParameterDefault.Molang(element.asJsonObject.get("molang").requireUiString("$path.molang"))
+        }
+        val value = when (type) {
+            ParameterType.STRING -> ParameterValue.StringValue(element.requireUiString(path))
+            ParameterType.NUMBER -> ParameterValue.NumberValue(element.requireUiNumber(path))
+            ParameterType.BOOLEAN -> ParameterValue.BooleanValue(element.requireUiBoolean(path))
+            ParameterType.VEC3 -> {
+                require(element.isJsonArray && element.asJsonArray.size() == 3) { "'$path' must be a three-number array" }
+                ParameterValue.Vec3Value(
+                    element.asJsonArray[0].requireUiNumber("$path[0]"),
+                    element.asJsonArray[1].requireUiNumber("$path[1]"),
+                    element.asJsonArray[2].requireUiNumber("$path[2]")
+                )
+            }
+        }
+        MolangUiPacketLimits.requireValue(value.asWireValue(), path)
+        return ParameterDefault.Literal(value)
+    }
+
+    private fun parseActions(json: JsonObject?): Map<ActionKey, ActionDefinition> {
+        val result = json?.entrySet()?.associate { (name, element) ->
+            val key = ActionKey(name)
+            val obj = element.asJsonObject
+            val handler = obj.get("handler")?.requireUiString("actions.$name.handler")?.let { ResourceLocation.tryParse(it) ?: error("invalid handler for action '$name'") }
+            val params = obj.getAsJsonObject("parameters")?.entrySet()?.associate { (paramName, typeElement) ->
+                MolangUiPacketLimits.requireIdentifier(paramName, "action parameter name")
+                paramName to (ParameterType.fromId(typeElement.requireUiString("actions.$name.parameters.$paramName"))
+                    ?: throw IllegalArgumentException("unknown type for action parameter '$name.$paramName'"))
+            }?.toMap() ?: emptyMap()
+            require(params.size <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "action '$name' has too many parameters" }
+            key to ActionDefinition(handler, params)
+        }?.toMap() ?: emptyMap()
+        require(result.size <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "contract has too many actions" }
+        return result
+    }
+
+    private fun parseCollections(
+        json: JsonObject?,
+        itemExists: (ResourceLocation) -> Boolean
+    ): Map<String, CollectionConfig> {
+        require((json?.size() ?: 0) <= MolangUiPacketLimits.MAX_CONTRACTS) { "too many container collections" }
+        return json?.entrySet()?.associate { (name, element) ->
+            MolangUiPacketLimits.requireIdentifier(name, "collection name")
+            val obj = element.asJsonObject
+            val source = CollectionSource.fromId(obj.get("source")?.requireUiString("collections.$name.source") ?: "session")
+                ?: throw IllegalArgumentException("unknown source for collection '$name'")
+            val filters = obj.getAsJsonArray("allowed_items")?.map { raw ->
+                val filter = ItemFilterEntry.parse(raw.requireUiString("collections.$name.allowed_items"))
+                    ?: throw IllegalArgumentException("invalid item filter '${raw.asString}' in '$name'")
+                if (filter is ItemFilterEntry.Item) require(itemExists(filter.id)) {
+                    "unknown item '${filter.id}' in collection '$name'"
+                }
+                filter
+            }?.toList() ?: emptyList()
+            val layoutObj = obj.getAsJsonObject("layout") ?: throw IllegalArgumentException("collection '$name' is missing layout")
+            val offset = layoutObj.pair("offset", 0, 0)
+            val grid = layoutObj.pair("grid_dimensions", 1, 1)
+            val slotSize = layoutObj.pair("slot_size", 18, 18)
+            val spacing = layoutObj.pair("slot_spacing", 0, 0)
+            val layout = SlotLayout(offset.first, offset.second, grid.first, grid.second, slotSize.first, slotSize.second, spacing.first, spacing.second)
+            name to CollectionConfig(
+                obj.get("size").requireUiInt("collections.$name.size"), filters,
+                obj.get("take_only")?.requireUiBoolean("collections.$name.take_only") ?: false, source,
+                obj.getAsJsonArray("slots")?.map { it.requireUiInt("collections.$name.slots") }?.toList(), layout
+            )
+        }?.toMap() ?: emptyMap()
+    }
+
+    private fun parseShiftRules(array: JsonArray?, collections: Set<String>): List<ShiftClickRule> =
+        array?.map { element ->
+            val obj = element.asJsonObject
+            val from = obj.stringList("from")
+            val to = obj.stringList("to")
+            val valid = collections + ShiftClickRule.PLAYER_SIDE_NAMES
+            require(from.isNotEmpty() && to.isNotEmpty() && (from + to).all { it in valid }) { "shift-click rule references an unknown collection" }
+            ShiftClickRule(from, to)
+        }?.toList() ?: emptyList()
+
+    fun getContract(id: ResourceLocation): MolangUiContract? = contracts[id]
+    fun getAllContracts(): Map<ResourceLocation, MolangUiContract> = contracts.toMap()
+    fun versions(): Map<ResourceLocation, String> = contracts.mapValues { it.value.contractVersion }
+    fun parseFailureCount(): Long = parseFailures.get()
+}
+
+private fun JsonObject.pair(name: String, first: Int, second: Int): Pair<Int, Int> {
+    val value = getAsJsonArray(name) ?: return first to second
+    require(value.size() == 2) { "'$name' must have two entries" }
+    return value[0].requireUiInt(name) to value[1].requireUiInt(name)
+}
+private fun JsonObject.stringList(name: String): List<String> = getAsJsonArray(name)?.map { it.requireUiString(name) }?.toList()
+    ?: throw IllegalArgumentException("missing array '$name'")

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiDefinition.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.cobblemon.mod.common.api.molangui.widget.WidgetDefinition
+import net.minecraft.resources.ResourceLocation
+
+data class MolangUiDefinition(
+    val guiId: ResourceLocation,
+    val formatVersion: Int,
+    val contractVersion: String,
+    val mode: GuiMode,
+    val parameters: Map<String, ParameterType>,
+    val actions: Set<ActionKey>,
+    val exclusive: Boolean,
+    val root: WidgetDefinition,
+    val variables: Map<String, Double>
+)

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiDiagnostics.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import java.util.concurrent.atomic.AtomicLong
+
+object MolangUiDiagnostics {
+    private val activeSessions = AtomicLong()
+    private val rejectedActions = AtomicLong()
+    private val compatibilityFailures = AtomicLong()
+
+    internal fun sessionOpened() { activeSessions.incrementAndGet() }
+    internal fun sessionClosed() { activeSessions.updateAndGet { value -> (value - 1).coerceAtLeast(0) } }
+    internal fun actionRejected() { rejectedActions.incrementAndGet() }
+    internal fun compatibilityFailures(count: Long) { compatibilityFailures.addAndGet(count) }
+
+    fun snapshot() = Snapshot(activeSessions.get(), rejectedActions.get(), compatibilityFailures.get(), MolangUiContractRegistry.parseFailureCount())
+
+    data class Snapshot(val activeSessions: Long, val rejectedActions: Long, val compatibilityFailures: Long, val parseFailures: Long)
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiJson.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.google.gson.JsonElement
+
+internal fun JsonElement?.requireUiString(path: String): String {
+    require(this != null && isJsonPrimitive && asJsonPrimitive.isString) { "'$path' must be a string" }
+    return asString
+}
+
+internal fun JsonElement?.requireUiBoolean(path: String): Boolean {
+    require(this != null && isJsonPrimitive && asJsonPrimitive.isBoolean) { "'$path' must be a boolean" }
+    return asBoolean
+}
+
+internal fun JsonElement?.requireUiNumber(path: String): Double {
+    require(this != null && isJsonPrimitive && asJsonPrimitive.isNumber) { "'$path' must be a number" }
+    return asDouble.also { require(it.isFinite()) { "'$path' must be finite" } }
+}
+
+internal fun JsonElement?.requireUiInt(path: String): Int {
+    require(this != null && isJsonPrimitive && asJsonPrimitive.isNumber) { "'$path' must be an integer" }
+    return try {
+        asBigDecimal.intValueExact()
+    } catch (error: ArithmeticException) {
+        throw IllegalArgumentException("'$path' must be an integer in the 32-bit range", error)
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiModels.kt

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.cobblemon.mod.common.api.molangui.container.SlotLayout
+import com.cobblemon.mod.common.api.molangui.container.CollectionConfig
+import com.cobblemon.mod.common.api.molangui.container.CloseItemsPolicy
+import com.cobblemon.mod.common.api.molangui.container.ShiftClickRule
+import net.minecraft.core.BlockPos
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.level.ServerPlayer
+import java.util.UUID
+
+const val MOLANG_UI_FORMAT_VERSION = 1
+
+enum class ParameterType(val id: String) {
+    STRING("string"),
+    NUMBER("number"),
+    BOOLEAN("boolean"),
+    VEC3("vec3");
+
+    companion object {
+        fun fromId(id: String): ParameterType? = entries.firstOrNull { it.id == id }
+    }
+}
+
+sealed interface ParameterValue {
+    val type: ParameterType
+    fun asWireValue(): String
+
+    data class StringValue(val value: String) : ParameterValue {
+        override val type = ParameterType.STRING
+        override fun asWireValue() = value
+    }
+
+    data class NumberValue(val value: Double) : ParameterValue {
+        init { require(value.isFinite()) { "number parameters must be finite" } }
+        override val type = ParameterType.NUMBER
+        override fun asWireValue() = value.toString()
+    }
+
+    data class BooleanValue(val value: Boolean) : ParameterValue {
+        override val type = ParameterType.BOOLEAN
+        override fun asWireValue() = value.toString()
+    }
+
+    data class Vec3Value(val x: Double, val y: Double, val z: Double) : ParameterValue {
+        init { require(x.isFinite() && y.isFinite() && z.isFinite()) { "vec3 parameters must be finite" } }
+        override val type = ParameterType.VEC3
+        override fun asWireValue() = "$x,$y,$z"
+    }
+
+    companion object {
+        fun parse(type: ParameterType, value: String): ParameterValue? = when (type) {
+            ParameterType.STRING -> StringValue(value)
+            ParameterType.NUMBER -> value.toDoubleOrNull()?.takeIf(Double::isFinite)?.let(::NumberValue)
+            ParameterType.BOOLEAN -> value.toBooleanStrictOrNull()?.let(::BooleanValue)
+            ParameterType.VEC3 -> value.split(',').takeIf { it.size == 3 }
+                ?.map { it.trim().toDoubleOrNull() }
+                ?.takeIf { it.all { part -> part != null && part.isFinite() } }
+                ?.let { Vec3Value(it[0]!!, it[1]!!, it[2]!!) }
+        }
+    }
+}
+
+data class ParameterDefinition(
+    val type: ParameterType,
+    val required: Boolean = true,
+    val default: ParameterDefault? = null
+)
+
+sealed interface ParameterDefault {
+    data class Literal(val value: ParameterValue) : ParameterDefault
+    data class Molang(val expression: String) : ParameterDefault
+}
+
+@JvmInline
+value class ActionKey(val value: String) {
+    init { require(value.isNotBlank() && value.length <= MolangUiPacketLimits.MAX_IDENTIFIER_LENGTH) }
+}
+
+data class ActionDefinition(
+    val handler: ResourceLocation? = null,
+    val parameters: Map<String, ParameterType> = emptyMap()
+)
+
+data class MolangUiContract(
+    val id: ResourceLocation,
+    val formatVersion: Int,
+    val contractVersion: String,
+    val mode: GuiMode,
+    val parameters: Map<String, ParameterDefinition>,
+    val actions: Map<ActionKey, ActionDefinition>,
+    val onOpen: ResourceLocation?,
+    val collections: Map<String, CollectionConfig>,
+    val shiftClickRules: List<ShiftClickRule>,
+    val closeItemsPolicy: CloseItemsPolicy,
+    val exclusive: Boolean
+) {
+    init {
+        require(mode == GuiMode.SCREEN || collections.isEmpty()) { "overlay views cannot have container collections" }
+        SlotLayout.validateCollections(collections.mapValues { it.value.layout })
+    }
+}
+
+data class MolangUiOpenRequest(
+    val uiId: ResourceLocation,
+    val parameters: Map<String, ParameterValue> = emptyMap(),
+    val blockPos: BlockPos? = null
+)
+
+sealed interface MolangUiOpenResult {
+    data class Opened(val session: MolangUiSessionHandle) : MolangUiOpenResult
+    data class Rejected(val reason: RejectionReason, val detail: String) : MolangUiOpenResult
+}
+
+enum class RejectionReason {
+    UNKNOWN_UI,
+    INCOMPATIBLE_CLIENT,
+    INVALID_PARAMETERS,
+    SESSION_LIMIT,
+    INVALID_CONTAINER,
+    INTERNAL_ERROR
+}
+
+enum class SessionState { OPENING, ACTIVE, CLOSING, CLOSED }
+
+interface MolangUiSessionHandle : AutoCloseable {
+    val sessionId: UUID
+    val uiId: ResourceLocation
+    val state: SessionState
+    fun updateParameters(parameters: Map<String, ParameterValue>): Boolean
+    fun updateVariables(variables: Map<String, Double>): Boolean
+    override fun close()
+}
+
+data class MolangUiActionContext(
+    val session: MolangUiSessionHandle,
+    val player: ServerPlayer,
+    val parameters: Map<String, ParameterValue>
+)
+
+fun interface MolangUiActionHandler {
+    fun handle(context: MolangUiActionContext)
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiPacketLimits.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+object MolangUiPacketLimits {
+    const val MAX_CONTRACTS = 256
+    const val MAX_ACTION_FIELDS = 32
+    const val MAX_IDENTIFIER_LENGTH = 128
+    const val MAX_VALUE_LENGTH = 4 * 1024
+    const val MAX_PACKET_BYTES = 256 * 1024
+
+    fun requireIdentifier(value: String, label: String): String {
+        require(value.isNotBlank() && value.length <= MAX_IDENTIFIER_LENGTH) {
+            "$label must contain 1..$MAX_IDENTIFIER_LENGTH characters"
+        }
+        return value
+    }
+
+    fun requireValue(value: String, label: String): String {
+        require(value.length <= MAX_VALUE_LENGTH) { "$label exceeds $MAX_VALUE_LENGTH characters" }
+        return value
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiParameters.kt

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.bedrockk.molang.runtime.value.DoubleValue
+import com.bedrockk.molang.runtime.value.MoValue
+import com.bedrockk.molang.runtime.value.StringValue
+
+internal object MolangUiParameters {
+    val GENERAL_FUNCTIONS = setOf("format", "to_string", "to_number", "to_int", "is_number", "is_int", "is_blank")
+    private val reserved = GENERAL_FUNCTIONS + setOf(
+        "gui_id", "gui_time", "delta", "screen_width", "screen_height", "mouse_x", "mouse_y", "item", "translate", "event"
+    )
+    private val namePattern = Regex("[a-z_][a-z0-9_]*")
+
+    fun requireName(name: String) {
+        MolangUiPacketLimits.requireIdentifier(name, "parameter name")
+        require(namePattern.matches(name) && name !in reserved) { "invalid or reserved parameter name '$name'" }
+    }
+
+    fun decode(types: Map<String, ParameterType>, values: Map<String, String>): Map<String, ParameterValue> {
+        require(values.size <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "too many parameters" }
+        return values.mapValues { (name, raw) ->
+            requireName(name)
+            val type = types[name] ?: throw IllegalArgumentException("undeclared parameter '$name'")
+            MolangUiPacketLimits.requireValue(raw, name)
+            ParameterValue.parse(type, raw) ?: throw IllegalArgumentException("invalid ${type.id} parameter '$name'")
+        }
+    }
+
+    fun validate(values: Map<String, ParameterValue>) {
+        require(values.size <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "too many parameters" }
+        values.forEach { (name, value) ->
+            requireName(name)
+            MolangUiPacketLimits.requireValue(value.asWireValue(), name)
+        }
+    }
+
+    fun requireVariableName(name: String): String {
+        MolangUiPacketLimits.requireIdentifier(name, "variable name")
+        return name.removePrefix("v.").also {
+            require(namePattern.matches(it)) { "invalid variable '$name'" }
+        }
+    }
+
+    fun validateVariables(values: Map<String, Double>) {
+        val names = mutableSetOf<String>()
+        values.forEach { (name, value) ->
+            val canonical = requireVariableName(name)
+            require(names.add(canonical) && value.isFinite()) {
+                "invalid or duplicate variable '$name'"
+            }
+        }
+    }
+}
+
+internal fun ParameterValue.asMoLangValue(): MoValue = when (this) {
+    is ParameterValue.StringValue -> StringValue(value)
+    is ParameterValue.NumberValue -> DoubleValue(value)
+    is ParameterValue.BooleanValue -> DoubleValue(value)
+    is ParameterValue.Vec3Value -> StringValue(asWireValue())
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiRegistry.kt

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.cobblemon.mod.common.Cobblemon
+import com.cobblemon.mod.common.api.molangui.template.TemplateLibraryRegistry
+import com.cobblemon.mod.common.api.molangui.widget.WidgetDefinition
+import com.cobblemon.mod.common.api.molangui.widget.WidgetTree
+import com.google.gson.JsonObject
+import com.google.gson.JsonParser
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.packs.resources.ResourceManager
+import java.util.concurrent.atomic.AtomicLong
+
+/** Client asset registry. Server code must use [MolangUiContractRegistry]. */
+object MolangUiRegistry {
+    private const val DIRECTORY = "molang_ui"
+    private val definitions = linkedMapOf<ResourceLocation, MolangUiDefinition>()
+    private val parseFailures = AtomicLong()
+
+    fun reload(manager: ResourceManager) {
+        TemplateLibraryRegistry.reload(manager)
+        val next = linkedMapOf<ResourceLocation, MolangUiDefinition>()
+        manager.listResources(DIRECTORY) { it.path.endsWith(".json") && !it.path.contains("/templates/") }
+            .forEach { (identifier, resource) ->
+                val guiId = ResourceLocation.fromNamespaceAndPath(
+                    identifier.namespace,
+                    identifier.path.removePrefix("$DIRECTORY/").removeSuffix(".json")
+                )
+                try {
+                    val json = resource.openAsReader().use { JsonParser.parseReader(it).asJsonObject }
+                    next[guiId] = parse(guiId, json)
+                } catch (error: Exception) {
+                    parseFailures.incrementAndGet()
+                    Cobblemon.LOGGER.error("Rejected Molang UI view '$identifier': ${error.message}")
+                }
+            }
+        require(next.size <= MolangUiPacketLimits.MAX_CONTRACTS) { "too many Molang UI views" }
+        definitions.clear()
+        definitions.putAll(next)
+        Cobblemon.LOGGER.info("Loaded ${definitions.size} validated Molang UI views")
+    }
+
+    internal fun parse(guiId: ResourceLocation, json: JsonObject): MolangUiDefinition {
+        require(!json.has("blocks_input")) { "blocks_input is unsupported; input handling is determined by mode" }
+        val formatVersion = json.get("format_version").requireUiInt("format_version")
+        require(formatVersion == MOLANG_UI_FORMAT_VERSION) { "unsupported format_version $formatVersion" }
+        val contractVersion = json.get("contract_version").requireUiString("contract_version")
+        MolangUiPacketLimits.requireIdentifier(contractVersion, "contract_version")
+        val mode = GuiMode.fromString(json.get("mode").requireUiString("mode"))
+            ?: throw IllegalArgumentException("unknown mode '${json.get("mode").asString}'")
+        val parameterJson = json.getAsJsonObject("parameters")
+        require((parameterJson?.size() ?: 0) <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "too many parameters" }
+        val parameters = parameterJson?.entrySet()?.associate { (name, value) ->
+            MolangUiParameters.requireName(name)
+            val type = ParameterType.fromId(value.requireUiString("parameters.$name"))
+                ?: throw IllegalArgumentException("unknown parameter type for '$name'")
+            name to type
+        }?.toMap() ?: emptyMap()
+        val actions = json.getAsJsonArray("actions")?.map { ActionKey(it.requireUiString("actions")) }?.toSet() ?: emptySet()
+        require(actions.size <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "too many declared actions" }
+        val variables = json.getAsJsonObject("variables")?.entrySet()?.associate { (name, value) ->
+            MolangUiPacketLimits.requireIdentifier(name, "variable name")
+            name to value.requireUiNumber("variables.$name")
+        }?.toMap() ?: emptyMap()
+        MolangUiParameters.validateVariables(variables)
+        require(!json.has("imports")) { "template imports are unsupported; use qualified template references" }
+        val root = WidgetTree.parse(json)
+        val referencedActions = linkedSetOf<ActionKey>().also { collectActions(root, it) }
+        val undeclared = referencedActions - actions
+        require(undeclared.isEmpty()) { "widgets reference undeclared actions: ${undeclared.joinToString { it.value }}" }
+        return MolangUiDefinition(
+            guiId, formatVersion, contractVersion, mode, parameters, actions,
+            json.get("exclusive")?.requireUiBoolean("exclusive") ?: false,
+            root, variables
+        )
+    }
+
+    private fun collectActions(node: WidgetDefinition, output: MutableSet<ActionKey>) {
+        node.events.values.forEach { output += it.action }
+        node.children.forEach { collectActions(it, output) }
+        node.itemTemplate?.let { collectActions(it, output) }
+    }
+
+    fun getDefinition(guiId: ResourceLocation): MolangUiDefinition? = definitions[guiId]
+    fun getAllDefinitions(): Map<ResourceLocation, MolangUiDefinition> = definitions.toMap()
+    fun getVersionMap(): Map<ResourceLocation, String> = definitions.mapValues { it.value.contractVersion }
+    fun parseFailureCount(): Long = parseFailures.get()
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiServerRuntimeFactory.kt

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.bedrockk.molang.runtime.MoLangRuntime
+import com.bedrockk.molang.runtime.value.DoubleValue
+import com.bedrockk.molang.runtime.value.MoValue
+import com.bedrockk.molang.runtime.value.StringValue
+import com.cobblemon.mod.common.api.molang.function.GeneralMoLangFunctions
+import net.minecraft.core.registries.BuiltInRegistries
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.world.item.Item
+import net.minecraft.world.item.ItemStack
+
+/** Builds a server runtime with only UI-scoped capabilities. It never exposes q.player. */
+internal object MolangUiServerRuntimeFactory {
+    fun create(session: MolangUiSession): MoLangRuntime = MoLangRuntime().also { runtime ->
+        GeneralMoLangFunctions.functions.filterKeys { it in MolangUiParameters.GENERAL_FUNCTIONS }.forEach { (name, function) ->
+            runtime.environment.query.addFunction(name) { function(it) }
+        }
+        runtime.environment.query.addFunction("parameter") { params ->
+            session.getParameter(params.getString(0))?.asMoLangValue() ?: DoubleValue.ZERO
+        }
+        runtime.environment.query.addFunction("update_parameter") { params ->
+            val name = params.getString(0)
+            val raw = params.get<MoValue>(1).asString()
+            val type = session.contract.parameters[name]?.type
+            DoubleValue(type != null && ParameterValue.parse(type, raw)?.let { session.updateParameters(mapOf(name to it)) } == true)
+        }
+        runtime.environment.query.addFunction("update_variable") { params ->
+            val value = params.getDouble(1)
+            DoubleValue(value.isFinite() && session.updateVariables(mapOf(params.getString(0) to value)))
+        }
+        runtime.environment.query.addFunction("close_ui") {
+            session.close()
+            DoubleValue.ONE
+        }
+        runtime.environment.query.addFunction("count_item") { params ->
+            val item = validatedItem(params.getString(0)) ?: return@addFunction DoubleValue.ZERO
+            DoubleValue(session.player.inventory.items.filter { it.`is`(item) }.sumOf(ItemStack::getCount).toDouble())
+        }
+        runtime.environment.query.addFunction("remove_items") { params ->
+            val item = validatedItem(params.getString(0)) ?: return@addFunction DoubleValue.ZERO
+            val count = params.getDouble(1).asNonnegativeInt() ?: return@addFunction DoubleValue.ZERO
+            DoubleValue(count > 0 && removeAtomically(session, item, count))
+        }
+        runtime.environment.query.addFunction("slot") { params ->
+            val index = params.getDouble(1).asNonnegativeInt() ?: return@addFunction StringValue("")
+            val stack = session.containerMenu?.getStack(params.getString(0), index)
+            if (stack == null || stack.isEmpty) StringValue("") else StringValue(BuiltInRegistries.ITEM.getKey(stack.item).toString())
+        }
+        runtime.environment.query.addFunction("replace_slot") { params ->
+            val itemId = params.getString(5)
+            validatedItem(itemId) ?: return@addFunction DoubleValue.ZERO
+            val inputIndex = params.getDouble(1).asNonnegativeInt() ?: return@addFunction DoubleValue.ZERO
+            val consumeCount = params.getDouble(2).asNonnegativeInt() ?: return@addFunction DoubleValue.ZERO
+            val outputIndex = params.getDouble(4).asNonnegativeInt() ?: return@addFunction DoubleValue.ZERO
+            val outputCount = params.getDouble(6).asNonnegativeInt() ?: return@addFunction DoubleValue.ZERO
+            val result = session.containerMenu?.replaceSlotAtomically(
+                params.getString(0), inputIndex, consumeCount,
+                params.getString(3), outputIndex, itemId, outputCount
+            ) ?: false
+            DoubleValue(result)
+        }
+    }
+
+    private fun validatedItem(raw: String) = ResourceLocation.tryParse(raw)
+        ?.takeIf(BuiltInRegistries.ITEM::containsKey)
+        ?.let(BuiltInRegistries.ITEM::get)
+
+    private fun Double.asNonnegativeInt(): Int? =
+        takeIf { it.isFinite() && it in 0.0..Int.MAX_VALUE.toDouble() && it % 1.0 == 0.0 }?.toInt()
+
+    private fun removeAtomically(session: MolangUiSession, item: Item, count: Int): Boolean {
+        val stacks = session.player.inventory.items.filter { it.`is`(item) }
+        if (stacks.sumOf(ItemStack::getCount) < count) return false
+        var remaining = count
+        stacks.forEach { stack ->
+            if (remaining == 0) return@forEach
+            val removed = minOf(stack.count, remaining)
+            stack.shrink(removed)
+            remaining -= removed
+        }
+        session.player.inventory.setChanged()
+        return true
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/MolangUiSession.kt

@@ -0,0 +1,317 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui
+
+import com.bedrockk.molang.runtime.MoLangRuntime
+import net.minecraft.core.BlockPos
+import com.cobblemon.mod.common.Cobblemon
+import com.cobblemon.mod.common.api.molangui.container.CollectionSource
+import com.cobblemon.mod.common.api.molangui.container.MolangContainerMenu
+import com.cobblemon.mod.common.api.molangui.container.ServerCollectionSetup
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiClosePacket
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiOpenPacket
+import com.cobblemon.mod.common.net.messages.client.molangui.MolangUiUpdatePacket
+import com.cobblemon.mod.common.util.asExpressionLike
+import net.minecraft.network.chat.Component
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.level.ServerPlayer
+import net.minecraft.world.Container
+import net.minecraft.world.MenuProvider
+import net.minecraft.world.SimpleContainer
+import net.minecraft.world.entity.player.Inventory
+import net.minecraft.world.entity.player.Player
+import net.minecraft.world.inventory.AbstractContainerMenu
+import java.util.UUID
+
+internal class MolangUiSession(
+    override val sessionId: UUID,
+    override val uiId: ResourceLocation,
+    val player: ServerPlayer,
+    val contract: MolangUiContract,
+    initialParameters: Map<String, ParameterValue>,
+    val blockPos: BlockPos?
+) : MolangUiSessionHandle {
+    override var state: SessionState = SessionState.OPENING
+        private set
+    private val parameters = initialParameters.toMutableMap()
+    internal var containerMenu: MolangContainerMenu? = null
+    private var clientWasNotified = false
+
+    override fun updateParameters(parameters: Map<String, ParameterValue>): Boolean {
+        assertServerThread()
+        if (state != SessionState.ACTIVE || !validateParameterUpdate(parameters)) return false
+        MolangUiUpdatePacket(sessionId, parameters.mapValues { it.value.asWireValue() }).sendToPlayer(player)
+        this.parameters.putAll(parameters)
+        return true
+    }
+
+    override fun updateVariables(variables: Map<String, Double>): Boolean {
+        assertServerThread()
+        if (state != SessionState.ACTIVE || variables.size > MolangUiPacketLimits.MAX_ACTION_FIELDS) return false
+        try {
+            MolangUiParameters.validateVariables(variables)
+        } catch (error: IllegalArgumentException) {
+            return false
+        }
+        MolangUiUpdatePacket(sessionId, emptyMap(), variables).sendToPlayer(player)
+        return true
+    }
+
+    override fun close() = closeInternal(notifyClient = true, closeMenu = true)
+
+    internal fun closeFromClient() = closeInternal(notifyClient = false, closeMenu = true)
+    internal fun closeFromMenu() = closeInternal(notifyClient = true, closeMenu = false)
+
+    internal fun activate() {
+        assertServerThread()
+        check(state == SessionState.OPENING)
+        state = SessionState.ACTIVE
+    }
+
+    internal fun notifyOpened(hasContainer: Boolean) {
+        check(state == SessionState.OPENING)
+        clientWasNotified = true
+        MolangUiOpenPacket(
+            sessionId, uiId, contract.contractVersion, contract.mode,
+            parameters.mapValues { it.value.asWireValue() }, contract.exclusive,
+            hasContainer, contract.collections.mapValues { it.value.layout }
+        ).sendToPlayer(player)
+    }
+
+    internal fun getParameter(name: String): ParameterValue? = parameters[name]
+
+    private fun validateParameterUpdate(values: Map<String, ParameterValue>): Boolean =
+        values.size <= MolangUiPacketLimits.MAX_ACTION_FIELDS && values.all { (name, value) ->
+            contract.parameters[name]?.type == value.type && value.asWireValue().length <= MolangUiPacketLimits.MAX_VALUE_LENGTH
+        }
+
+    private fun closeInternal(notifyClient: Boolean, closeMenu: Boolean) {
+        assertServerThread()
+        if (state == SessionState.CLOSING || state == SessionState.CLOSED) return
+        state = SessionState.CLOSING
+        val menu = containerMenu
+        containerMenu = null
+        try {
+            cleanup("notify client") {
+                if (notifyClient && clientWasNotified) MolangUiClosePacket(sessionId).sendToPlayer(player)
+            }
+            cleanup("close container") {
+                if (closeMenu && menu != null && player.containerMenu === menu) player.closeContainer()
+            }
+            cleanup("release items") { menu?.releaseOwnedItemsOnce(player) }
+        } finally {
+            state = SessionState.CLOSED
+            MolangUiService.remove(sessionId)
+        }
+    }
+
+    private inline fun cleanup(operation: String, action: () -> Unit) {
+        try {
+            action()
+        } catch (error: Exception) {
+            Cobblemon.LOGGER.error("Failed to $operation while closing Molang UI session $sessionId", error)
+        }
+    }
+
+    private fun assertServerThread() {
+        check(player.server.isSameThread) { "Molang UI sessions are confined to the server thread" }
+    }
+}
+
+object MolangUiService {
+    private const val MAX_OVERLAYS_PER_PLAYER = 8
+    private val sessions = linkedMapOf<UUID, MolangUiSession>()
+    private val disabled = mutableMapOf<UUID, Set<ResourceLocation>>()
+    private val rateLimiters = mutableMapOf<UUID, MolangUiRateLimiter>()
+
+    fun open(player: ServerPlayer, request: MolangUiOpenRequest): MolangUiOpenResult {
+        check(player.server.isSameThread) { "MolangUiService.open must run on the server thread" }
+        val contract = MolangUiContractRegistry.getContract(request.uiId)
+            ?: return MolangUiOpenResult.Rejected(RejectionReason.UNKNOWN_UI, "Unknown Molang UI '${request.uiId}'")
+        // Intentionally does not wait for the compatibility round-trip; the client re-validates on open.
+        if (disabled[player.uuid]?.contains(request.uiId) == true) {
+            return MolangUiOpenResult.Rejected(RejectionReason.INCOMPATIBLE_CLIENT, "Client view is missing or incompatible")
+        }
+        val parameters = resolveParameters(contract, request.parameters)
+            ?: return MolangUiOpenResult.Rejected(RejectionReason.INVALID_PARAMETERS, "Parameters do not match the contract")
+        val playerSessions = sessions.values.filter { it.player.uuid == player.uuid && it.state != SessionState.CLOSED }
+        if (contract.mode == GuiMode.OVERLAY && playerSessions.count { it.contract.mode == GuiMode.OVERLAY } >= MAX_OVERLAYS_PER_PLAYER) {
+            return MolangUiOpenResult.Rejected(RejectionReason.SESSION_LIMIT, "At most $MAX_OVERLAYS_PER_PLAYER overlays may be active")
+        }
+        val collectionSetup = try {
+            createCollections(player, contract, request.blockPos)
+                ?: return MolangUiOpenResult.Rejected(RejectionReason.INVALID_CONTAINER, "The bound block container is unavailable or invalid")
+        } catch (error: Exception) {
+            Cobblemon.LOGGER.error("Failed to prepare Molang UI '${request.uiId}'", error)
+            return MolangUiOpenResult.Rejected(RejectionReason.INTERNAL_ERROR, error.message ?: "Unable to prepare UI")
+        }
+        val session = MolangUiSession(UUID.randomUUID(), request.uiId, player, contract, parameters, request.blockPos)
+        sessions[session.sessionId] = session
+        MolangUiDiagnostics.sessionOpened()
+        return try {
+            if (contract.mode == GuiMode.SCREEN) {
+                playerSessions.filter { it.contract.mode == GuiMode.SCREEN }.forEach(MolangUiSession::close)
+            }
+            check(session.state == SessionState.OPENING) { "Molang UI closed while replacing its previous screen" }
+            MolangUiActionRegistry.executeOnOpen(session)
+            check(session.state == SessionState.OPENING) { "Molang UI closed during on_open" }
+            val hasContainer = contract.collections.isNotEmpty()
+            session.notifyOpened(hasContainer)
+            check(session.state == SessionState.OPENING) { "Molang UI closed while notifying the client" }
+            if (hasContainer) openContainer(session, collectionSetup)
+            session.activate()
+            MolangUiOpenResult.Opened(session)
+        } catch (error: Exception) {
+            Cobblemon.LOGGER.error("Failed to open Molang UI '${request.uiId}'", error)
+            session.close()
+            MolangUiOpenResult.Rejected(RejectionReason.INTERNAL_ERROR, error.message ?: "Unable to open UI")
+        }
+    }
+
+    fun handleAction(sessionId: UUID, player: ServerPlayer, actionRaw: String, raw: Map<String, String>) {
+        check(player.server.isSameThread)
+        val session = sessions[sessionId]
+        if (session == null || session.player.uuid != player.uuid || session.state != SessionState.ACTIVE) {
+            MolangUiDiagnostics.actionRejected()
+            return
+        }
+        if (!rateLimiters.getOrPut(sessionId) { MolangUiRateLimiter() }.tryAcquire()) {
+            MolangUiDiagnostics.actionRejected()
+            return
+        }
+        val action = runCatching { ActionKey(actionRaw) }.getOrNull()
+        val definition = action?.let(session.contract.actions::get)
+        if (action == null || definition == null || raw.keys != definition.parameters.keys || raw.size > MolangUiPacketLimits.MAX_ACTION_FIELDS) {
+            MolangUiDiagnostics.actionRejected()
+            return
+        }
+        val typed = linkedMapOf<String, ParameterValue>()
+        for ((name, type) in definition.parameters) {
+            val value = raw[name]
+            if (value == null || value.length > MolangUiPacketLimits.MAX_VALUE_LENGTH) {
+                MolangUiDiagnostics.actionRejected(); return
+            }
+            typed[name] = ParameterValue.parse(type, value) ?: run { MolangUiDiagnostics.actionRejected(); return }
+        }
+        try {
+            MolangUiActionRegistry.dispatch(session, action, typed)
+        } catch (error: Exception) {
+            MolangUiDiagnostics.actionRejected()
+            Cobblemon.LOGGER.error("Molang UI action '${action.value}' failed in session $sessionId", error)
+        }
+    }
+
+    fun handleClosed(sessionId: UUID, player: ServerPlayer) {
+        val session = sessions[sessionId] ?: return
+        if (session.player.uuid == player.uuid) session.closeFromClient() else MolangUiDiagnostics.actionRejected()
+    }
+
+    fun applyCompatibility(player: ServerPlayer, clientVersions: Map<ResourceLocation, String>) {
+        val incompatible = MolangUiContractRegistry.versions().filter { (id, version) -> clientVersions[id] != version }.keys
+        if (incompatible.isEmpty()) disabled.remove(player.uuid) else disabled[player.uuid] = incompatible
+        MolangUiDiagnostics.compatibilityFailures(incompatible.size.toLong())
+        sessions.values.filter { it.player.uuid == player.uuid && it.uiId in incompatible }.toList().forEach(MolangUiSession::close)
+    }
+
+    fun requestCompatibility(player: ServerPlayer) = MolangUiContractRegistry.sync(player)
+
+    fun closeAllForPlayer(playerId: UUID) {
+        sessions.values.filter { it.player.uuid == playerId }.toList().forEach(MolangUiSession::close)
+        disabled.remove(playerId)
+    }
+
+    fun closeAll() {
+        sessions.values.toList().forEach(MolangUiSession::close)
+        disabled.clear()
+    }
+
+    fun getSession(sessionId: UUID): MolangUiSessionHandle? = sessions[sessionId]
+    fun getSessionForPlayer(player: ServerPlayer, id: ResourceLocation): MolangUiSessionHandle? =
+        sessions.values.firstOrNull { it.player.uuid == player.uuid && it.uiId == id && it.state == SessionState.ACTIVE }
+    fun activeSessionCount(): Int = sessions.size
+
+    internal fun remove(sessionId: UUID) {
+        if (sessions.remove(sessionId) != null) MolangUiDiagnostics.sessionClosed()
+        rateLimiters.remove(sessionId)
+    }
+
+    private fun resolveParameters(contract: MolangUiContract, supplied: Map<String, ParameterValue>): Map<String, ParameterValue>? {
+        if (supplied.keys.any { it !in contract.parameters }) return null
+        val values = linkedMapOf<String, ParameterValue>()
+        for ((name, definition) in contract.parameters) {
+            val suppliedValue = supplied[name]
+            val value = suppliedValue ?: when (val default = definition.default) {
+                is ParameterDefault.Literal -> default.value
+                is ParameterDefault.Molang -> runCatching {
+                    val result = default.expression.asExpressionLike().resolveString(MoLangRuntime())
+                    ParameterValue.parse(definition.type, result)
+                }.getOrNull()
+                null -> null
+            }
+            if (value == null) {
+                if (definition.required) return null else continue
+            }
+            if (value.type != definition.type || value.asWireValue().length > MolangUiPacketLimits.MAX_VALUE_LENGTH) return null
+            values[name] = value
+        }
+        return values
+    }
+
+    private fun createCollections(
+        player: ServerPlayer,
+        contract: MolangUiContract,
+        blockPos: BlockPos?
+    ): List<ServerCollectionSetup>? {
+        val setups = mutableListOf<ServerCollectionSetup>()
+        for ((name, config) in contract.collections) {
+            val container: Container = when (config.source) {
+                CollectionSource.SESSION -> SimpleContainer(config.size)
+                CollectionSource.BLOCK_ENTITY -> {
+                    val pos = blockPos ?: return null
+                    if (player.distanceToSqr(pos.x + .5, pos.y + .5, pos.z + .5) > 64.0 || !player.level().hasChunk(pos.x shr 4, pos.z shr 4)) return null
+                    val blockEntity = player.level().getBlockEntity(pos)
+                    if (blockEntity !is Container) return null
+                    if ((config.slots ?: (0 until config.size).toList()).any { it >= blockEntity.containerSize }) return null
+                    blockEntity
+                }
+            }
+            setups += ServerCollectionSetup(name, config, container)
+        }
+        return setups
+    }
+
+    private fun openContainer(session: MolangUiSession, setup: List<ServerCollectionSetup>) {
+        val owned = setup.filter { it.config.source == CollectionSource.SESSION }.mapTo(mutableSetOf()) { it.name }
+        val opened = session.player.openMenu(object : MenuProvider {
+            override fun getDisplayName() = Component.empty()
+            override fun createMenu(containerId: Int, inventory: Inventory, player: Player): AbstractContainerMenu =
+                MolangContainerMenu(containerId, inventory).also { menu ->
+                    check(session.state == SessionState.OPENING) { "Molang UI closed before creating its container" }
+                    session.containerMenu = menu
+                    menu.initializeServer(
+                        setup, session.contract.shiftClickRules, owned, session.contract.closeItemsPolicy,
+                        owner = session.player, session = session, blockPos = session.blockPos
+                    )
+                }
+        })
+        check(opened.isPresent) { "player rejected the Molang UI container menu" }
+    }
+}
+
+internal class MolangUiRateLimiter(private var lastNanos: Long = System.nanoTime()) {
+    private var tokens = 40.0
+    fun tryAcquire(now: Long = System.nanoTime()): Boolean {
+        val elapsed = (now - lastNanos).coerceAtLeast(0) / 1_000_000_000.0
+        tokens = minOf(40.0, tokens + elapsed * 20.0)
+        lastNanos = now
+        if (tokens < 1.0) return false
+        tokens -= 1.0
+        return true
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/container/CollectionConfig.kt

@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.container
+
+import net.minecraft.core.registries.BuiltInRegistries
+import net.minecraft.core.registries.Registries
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.tags.TagKey
+import net.minecraft.world.item.ItemStack
+
+data class CollectionConfig(
+    val size: Int,
+    val allowedItems: List<ItemFilterEntry> = emptyList(),
+    val takeOnly: Boolean = false,
+    val source: CollectionSource = CollectionSource.SESSION,
+    val slots: List<Int>? = null,
+    val layout: SlotLayout
+) {
+    init {
+        require(size in 1..MAX_COLLECTION_SIZE) { "collection size must be in 1..$MAX_COLLECTION_SIZE" }
+        require(layout.slotCount == size) { "collection size must match its grid dimensions" }
+        require(slots == null || slots.size == size) { "block collection slot mapping must match collection size" }
+        require(slots == null || slots.distinct().size == slots.size) { "block collection slot mapping contains duplicates" }
+        require(slots == null || slots.all { it >= 0 }) { "block collection slot indices must be nonnegative" }
+        require(source == CollectionSource.BLOCK_ENTITY || slots == null) { "slot mapping is only valid for block_entity sources" }
+    }
+
+    fun isItemAllowed(stack: ItemStack): Boolean {
+        return !takeOnly && matchesFilter(stack)
+    }
+
+    fun matchesFilter(stack: ItemStack): Boolean {
+        if (allowedItems.isEmpty()) return true
+        return allowedItems.any { it.matches(stack) }
+    }
+
+    companion object { const val MAX_COLLECTION_SIZE = 256 }
+}
+
+enum class CollectionSource(val id: String) {
+    SESSION("session"), BLOCK_ENTITY("block_entity");
+    companion object { fun fromId(id: String) = entries.firstOrNull { it.id == id } }
+}
+
+data class ShiftClickRule(
+    val from: List<String>,
+    val to: List<String>
+) {
+    companion object {
+        const val PLAYER_INVENTORY = "player_inventory"
+        const val PLAYER_HOTBAR = "player_hotbar"
+        val PLAYER_SIDE_NAMES = listOf(PLAYER_INVENTORY, PLAYER_HOTBAR)
+    }
+}
+
+sealed interface ItemFilterEntry {
+    fun matches(stack: ItemStack): Boolean
+
+    data class Item(val id: ResourceLocation) : ItemFilterEntry {
+        override fun matches(stack: ItemStack): Boolean {
+            if (!BuiltInRegistries.ITEM.containsKey(id)) return false
+            return stack.`is`(BuiltInRegistries.ITEM.get(id))
+        }
+    }
+
+    data class Tag(val id: ResourceLocation) : ItemFilterEntry {
+        override fun matches(stack: ItemStack): Boolean = stack.`is`(TagKey.create(Registries.ITEM, id))
+    }
+
+    companion object {
+        fun parse(value: String): ItemFilterEntry? {
+            val trimmed = value.trim()
+            val isTag = trimmed.startsWith('#')
+            val id = ResourceLocation.tryParse(if (isTag) trimmed.substring(1) else trimmed) ?: return null
+            return if (isTag) Tag(id) else Item(id)
+        }
+    }
+}
+
+enum class CloseItemsPolicy(val id: String) {
+    DROP("drop"),
+    RETURN("return"),
+    DESTROY("destroy");
+
+    companion object {
+        fun fromId(id: String): CloseItemsPolicy? = entries.firstOrNull { it.id == id }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/container/CollectionSetup.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.container
+
+import net.minecraft.world.Container
+
+data class ServerCollectionSetup(
+    val name: String,
+    val config: CollectionConfig,
+    val container: Container
+)

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/container/MolangContainerMenu.kt

@@ -0,0 +1,300 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.container
+
+import com.cobblemon.mod.common.CobblemonMenuType
+import com.cobblemon.mod.common.api.molangui.MolangUiSession
+import com.cobblemon.mod.common.api.molangui.SessionState
+import net.minecraft.core.BlockPos
+import net.minecraft.core.registries.BuiltInRegistries
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.level.ServerPlayer
+import net.minecraft.world.Container
+import net.minecraft.world.SimpleContainer
+import net.minecraft.world.entity.player.Inventory
+import net.minecraft.world.entity.player.Player
+import net.minecraft.world.inventory.AbstractContainerMenu
+import net.minecraft.world.inventory.Slot
+import net.minecraft.world.item.ItemStack
+
+private data class CollectionSlotRange(
+    val name: String,
+    val startIndex: Int,
+    val endIndex: Int
+)
+
+class MolangContainerMenu(
+    containerId: Int,
+    private val playerInventory: Inventory
+) : AbstractContainerMenu(CobblemonMenuType.MOLANG_UI, containerId) {
+
+    private val collections: MutableMap<String, Container> = mutableMapOf()
+
+    private val collectionRanges: MutableList<CollectionSlotRange> = mutableListOf()
+    private var playerInventoryStart: Int = 0
+    private var playerHotbarStart: Int = 0
+    private var playerHotbarEnd: Int = 0
+
+    private var shiftClickRules: List<ShiftClickRule> = emptyList()
+
+    private val collectionConfigs: MutableMap<String, CollectionConfig> = mutableMapOf()
+    private val sessionOwnedCollections: MutableSet<String> = mutableSetOf()
+    private var closeItemsPolicy: CloseItemsPolicy = CloseItemsPolicy.RETURN
+    private var owner: ServerPlayer? = null
+    private var owningSession: MolangUiSession? = null
+    private var blockPos: BlockPos? = null
+    private var originalBlockContainer: Container? = null
+    private var ownedItemsReleased = false
+
+    internal fun initializeServer(
+        collectionSetup: List<ServerCollectionSetup>,
+        shiftClickRules: List<ShiftClickRule> = emptyList(),
+        sessionOwned: Set<String> = emptySet(),
+        closeItemsPolicy: CloseItemsPolicy = CloseItemsPolicy.RETURN,
+        owner: ServerPlayer,
+        session: MolangUiSession,
+        blockPos: BlockPos? = null
+    ) {
+        this.shiftClickRules = shiftClickRules
+        this.sessionOwnedCollections.addAll(sessionOwned)
+        this.closeItemsPolicy = closeItemsPolicy
+        this.owner = owner
+        this.owningSession = session
+        this.blockPos = blockPos
+
+        for (setup in collectionSetup) {
+            val (name, config, container) = setup
+            collections[name] = container
+            if (config.source == CollectionSource.BLOCK_ENTITY) originalBlockContainer = container
+            collectionConfigs[name] = config
+
+            val startIndex = slots.size
+            addCollectionSlots(name, config, container)
+            val endIndex = slots.size
+            collectionRanges.add(CollectionSlotRange(name, startIndex, endIndex))
+        }
+
+        addPlayerSlots()
+    }
+
+    fun initializeClient(
+        collectionLayouts: Map<String, SlotLayout>
+    ) {
+        SlotLayout.validateCollections(collectionLayouts)
+        for ((name, layout) in collectionLayouts) {
+            val config = CollectionConfig(size = layout.slotCount, layout = layout)
+            val container = SimpleContainer(layout.slotCount)
+            collections[name] = container
+            collectionConfigs[name] = config
+
+            val startIndex = slots.size
+            addCollectionSlots(name, config, container)
+            val endIndex = slots.size
+            collectionRanges.add(CollectionSlotRange(name, startIndex, endIndex))
+        }
+
+        addPlayerSlots()
+    }
+
+    private fun addCollectionSlots(
+        name: String,
+        config: CollectionConfig,
+        container: Container
+    ) {
+        val layout = config.layout
+        var containerIndex = 0
+        for (row in 0 until layout.rows) {
+            for (col in 0 until layout.columns) {
+                val x = layout.offsetX + col * (layout.slotWidth + layout.spacingX)
+                val y = layout.offsetY + row * (layout.slotHeight + layout.spacingY)
+                val mappedIndex = config.slots?.getOrNull(containerIndex) ?: containerIndex
+                require(mappedIndex in 0 until container.containerSize) { "collection '$name' maps outside its container" }
+                addSlot(MolangSlot(
+                    container = container,
+                    index = mappedIndex,
+                    x = x,
+                    y = y,
+                    collectionConfig = config
+                ))
+                containerIndex++
+            }
+        }
+    }
+
+    private fun addPlayerSlots() {
+        playerInventoryStart = slots.size
+
+        for (row in 0 until 3) {
+            for (col in 0 until 9) {
+                val inventoryIndex = 9 + row * 9 + col
+                val x = 8 + col * 18
+                val y = 84 + row * 18
+                addSlot(Slot(playerInventory, inventoryIndex, x, y))
+            }
+        }
+
+        playerHotbarStart = slots.size
+
+        for (col in 0 until 9) {
+            addSlot(Slot(playerInventory, col, 8 + col * 18, 142))
+        }
+
+        playerHotbarEnd = slots.size
+    }
+
+    override fun quickMoveStack(player: Player, index: Int): ItemStack {
+        val slot = slots.getOrNull(index) ?: return ItemStack.EMPTY
+        if (!slot.hasItem() || !slot.mayPickup(player)) return ItemStack.EMPTY
+
+        val slotItem = slot.item
+        val original = slotItem.copy()
+
+        val clickedCollection = collectionRanges.firstOrNull { index >= it.startIndex && index < it.endIndex }
+        val isPlayerInventory = index >= playerInventoryStart && index < playerInventoryEnd()
+        val isHotbar = index >= playerHotbarStart && index < playerHotbarEnd
+
+        val sourceName = clickedCollection?.name ?: when {
+            isPlayerInventory -> ShiftClickRule.PLAYER_INVENTORY
+            isHotbar -> ShiftClickRule.PLAYER_HOTBAR
+            else -> return ItemStack.EMPTY
+        }
+        val destinations = findShiftClickRule(sourceName)?.to ?: if (clickedCollection != null) {
+            ShiftClickRule.PLAYER_SIDE_NAMES
+        } else {
+            collectionRanges.map { it.name }
+        }
+        if (!tryMoveToCollections(slotItem, slot, destinations)) return ItemStack.EMPTY
+
+        if (slotItem.isEmpty) {
+            slot.setByPlayer(ItemStack.EMPTY)
+        } else {
+            slot.setChanged()
+        }
+
+        if (slotItem.count == original.count) return ItemStack.EMPTY
+
+        slot.onTake(player, slotItem)
+        return original
+    }
+
+    override fun stillValid(player: Player): Boolean {
+        val expectedOwner = owner ?: return true // client menu
+        if (player.uuid != expectedOwner.uuid || owningSession?.state != SessionState.ACTIVE) return false
+        val pos = blockPos ?: return true
+        if (player.distanceToSqr(pos.x + .5, pos.y + .5, pos.z + .5) > 64.0) return false
+        return player.level().getBlockEntity(pos) === originalBlockContainer
+    }
+
+    override fun removed(player: Player) {
+        try {
+            super.removed(player)
+        } finally {
+            try {
+                releaseOwnedItemsOnce(player)
+            } finally {
+                owningSession?.closeFromMenu()
+            }
+        }
+    }
+
+    fun releaseOwnedItemsOnce(player: Player) {
+        if (ownedItemsReleased) return
+        ownedItemsReleased = true
+        for (name in sessionOwnedCollections) {
+            val container = collections[name] ?: continue
+            when (closeItemsPolicy) {
+                CloseItemsPolicy.DROP -> clearContainer(player, container)
+                CloseItemsPolicy.RETURN -> returnItemsToPlayer(player, container)
+                CloseItemsPolicy.DESTROY -> container.clearContent()
+            }
+        }
+    }
+
+    fun getStack(collection: String, index: Int): ItemStack? {
+        return collectionSlot(collection, index)?.item
+    }
+
+    fun replaceSlotAtomically(
+        inputCollection: String,
+        inputIndex: Int,
+        consumeCount: Int,
+        outputCollection: String,
+        outputIndex: Int,
+        outputItemId: String,
+        outputCount: Int
+    ): Boolean {
+        if (consumeCount <= 0 || outputCount <= 0) return false
+        val input = collectionSlot(inputCollection, inputIndex) ?: return false
+        val output = collectionSlot(outputCollection, outputIndex) ?: return false
+        val id = ResourceLocation.tryParse(outputItemId)?.takeIf(BuiltInRegistries.ITEM::containsKey) ?: return false
+        val produced = ItemStack(BuiltInRegistries.ITEM.get(id), outputCount)
+        val outputConfig = collectionConfigs[outputCollection] ?: return false
+        if (!outputConfig.matchesFilter(produced)) return false
+        val source = input.item
+        if (source.count < consumeCount) return false
+        val remaining = source.copyWithCount(source.count - consumeCount)
+        val sameSlot = input.container === output.container && input.containerSlot == output.containerSlot
+        val existing = if (sameSlot) remaining else output.item
+        if (!existing.isEmpty && !ItemStack.isSameItemSameComponents(existing, produced)) return false
+        val limit = output.getMaxStackSize(produced)
+        if (existing.count > limit || outputCount > limit - existing.count) return false
+        val result = if (existing.isEmpty) produced else existing.copyWithCount(existing.count + outputCount)
+        if (!sameSlot) input.set(remaining)
+        output.set(result)
+        return true
+    }
+
+    private fun playerInventoryEnd() = playerHotbarStart
+
+    private fun findShiftClickRule(fromCollection: String): ShiftClickRule? {
+        return shiftClickRules.firstOrNull { rule ->
+            rule.from.contains(fromCollection)
+        }
+    }
+
+    private fun collectionSlot(name: String, index: Int): Slot? {
+        val range = collectionRanges.firstOrNull { it.name == name } ?: return null
+        if (index !in 0 until range.endIndex - range.startIndex) return null
+        return slots[range.startIndex + index]
+    }
+
+    private fun tryMoveToCollections(stack: ItemStack, source: Slot, toNames: List<String>): Boolean {
+        val originalCount = stack.count
+        for (name in toNames) {
+            val indices = when (name) {
+                ShiftClickRule.PLAYER_INVENTORY -> playerInventoryStart until playerHotbarStart
+                ShiftClickRule.PLAYER_HOTBAR -> playerHotbarStart until playerHotbarEnd
+                else -> collectionRanges.firstOrNull { it.name == name }?.let { it.startIndex until it.endIndex } ?: continue
+            }
+            for (merge in listOf(true, false)) {
+                for (index in indices) {
+                    if (stack.isEmpty) return true
+                    val destination = slots[index]
+                    if (destination.container === source.container && destination.containerSlot == source.containerSlot) continue
+                    if (destination.hasItem() != merge || destination.item.count >= destination.getMaxStackSize(stack)) continue
+                    destination.safeInsert(stack)
+                }
+            }
+        }
+        return stack.count < originalCount
+    }
+
+    private fun returnItemsToPlayer(player: Player, container: Container) {
+        val inventory = player.inventory
+        for (i in 0 until container.containerSize) {
+            val stack = container.getItem(i)
+            if (!stack.isEmpty) {
+                if (!inventory.add(stack)) {
+                    player.drop(stack, false)
+                }
+                container.setItem(i, ItemStack.EMPTY)
+            }
+        }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/container/MolangSlot.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.container
+
+import net.minecraft.world.Container
+import net.minecraft.world.inventory.Slot
+import net.minecraft.world.item.ItemStack
+
+class MolangSlot(
+    container: Container,
+    index: Int,
+    x: Int,
+    y: Int,
+    private val collectionConfig: CollectionConfig
+) : Slot(container, index, x, y) {
+
+    override fun mayPlace(stack: ItemStack): Boolean {
+        return collectionConfig.isItemAllowed(stack) && container.canPlaceItem(containerSlot, stack)
+    }
+
+    override fun getMaxStackSize(stack: ItemStack): Int = container.getMaxStackSize(stack)
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/container/SlotLayout.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.container
+
+import com.cobblemon.mod.common.api.molangui.MolangUiPacketLimits
+import net.minecraft.world.entity.player.Inventory
+
+data class SlotLayout(
+    val offsetX: Int,
+    val offsetY: Int,
+    val columns: Int,
+    val rows: Int,
+    val slotWidth: Int = 18,
+    val slotHeight: Int = 18,
+    val spacingX: Int = 0,
+    val spacingY: Int = 0
+) {
+    init {
+        require(columns in 1..MAX_GRID_DIMENSION && rows in 1..MAX_GRID_DIMENSION) { "slot grid dimensions must be in 1..$MAX_GRID_DIMENSION" }
+        validateAxis(offsetX, columns, slotWidth, spacingX)
+        validateAxis(offsetY, rows, slotHeight, spacingY)
+    }
+
+    val slotCount: Int get() = columns * rows
+
+    private fun validateAxis(offset: Int, count: Int, size: Int, spacing: Int) {
+        require(size > 0 && spacing >= 0) { "slot size must be positive and spacing nonnegative" }
+        val stride = size.toLong() + spacing
+        val lastSlotOffset = (count - 1) * stride
+        require(stride <= Int.MAX_VALUE && lastSlotOffset <= Int.MAX_VALUE && offset + lastSlotOffset + size <= Int.MAX_VALUE) {
+            "slot grid coordinates exceed the integer range"
+        }
+    }
+
+    companion object {
+        const val MAX_GRID_DIMENSION = 16
+
+        fun validateCollections(layouts: Map<String, SlotLayout>) {
+            require(layouts.size <= MolangUiPacketLimits.MAX_CONTRACTS) { "too many container collections" }
+            layouts.keys.forEach { name ->
+                MolangUiPacketLimits.requireIdentifier(name, "collection name")
+                require(name !in ShiftClickRule.PLAYER_SIDE_NAMES) { "collection name '$name' is reserved for player slots" }
+            }
+            // Native container packets encode slot indices as signed shorts.
+            require(layouts.values.sumOf { it.slotCount.toLong() } + Inventory.INVENTORY_SIZE <= Short.MAX_VALUE + 1L) {
+                "container slot indices exceed the native packet range"
+            }
+        }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/event/ClientEventProcessor.kt

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.event
+
+import com.bedrockk.molang.runtime.MoLangRuntime
+import com.bedrockk.molang.runtime.struct.QueryStruct
+import com.bedrockk.molang.runtime.value.DoubleValue
+import com.bedrockk.molang.runtime.value.StringValue
+import com.cobblemon.mod.common.api.molangui.MolangUiPacketLimits
+import com.cobblemon.mod.common.Cobblemon
+import com.cobblemon.mod.common.api.molangui.widget.WidgetDefinition
+import com.cobblemon.mod.common.api.molangui.widget.WidgetInstance
+import com.cobblemon.mod.common.api.molangui.widget.WidgetType
+import com.cobblemon.mod.common.net.messages.server.molangui.MolangUiActionPacket
+import com.cobblemon.mod.common.util.asExpressionLike
+import java.util.UUID
+
+object ClientEventProcessor {
+
+    fun processEvent(
+        event: WidgetEvent,
+        widget: WidgetDefinition,
+        runtime: MoLangRuntime,
+        sessionId: UUID
+    ) {
+        val context = QueryStruct(hashMapOf())
+        event.data.forEach { (key, value) -> context.addFunction(key) { DoubleValue(value) } }
+        context.addFunction("type") { StringValue(event.type.id) }
+        context.addFunction("widget_id") { StringValue(event.widgetId) }
+        val functions = runtime.environment.query.functions
+        val previous = functions.remove("event")
+        runtime.environment.query.addFunction("event") { context }
+        try {
+            widget.clientEvents[event.type.clientId]?.asExpressionLike()?.resolve(runtime)
+            widget.events[event.type.id]?.let { serverHandler ->
+                // Action arguments may depend on variables changed by the client handler.
+                val parameters = serverHandler.parameters.mapValues { (_, property) -> property.resolveString(runtime) }
+                require(parameters.size <= MolangUiPacketLimits.MAX_ACTION_FIELDS) { "too many action parameters" }
+                parameters.forEach { (name, value) ->
+                    MolangUiPacketLimits.requireIdentifier(name, "action parameter")
+                    MolangUiPacketLimits.requireValue(value, name)
+                }
+                MolangUiActionPacket(sessionId, serverHandler.action.value, parameters).sendToServer()
+            }
+        } catch (error: Exception) {
+            Cobblemon.LOGGER.warn("Failed UI event {} on widget {}: {}", event.type.id, event.widgetId, error.message)
+        } finally {
+            functions.remove("event")
+            if (previous != null) functions["event"] = previous
+        }
+    }
+
+    fun hitTest(root: WidgetInstance, x: Float, y: Float): WidgetInstance? {
+        if (!root.visible || !root.enabled) return null
+        val isScrollPanel = root.definition.type == WidgetType.SCROLL_PANEL
+        if (isScrollPanel && !root.containsPoint(x, y)) return null
+
+        for (child in root.children.asReversed()) {
+            if (!child.visible) continue
+            val testY = if (isScrollPanel) y - root.scrollOffset else y
+            val hit = hitTest(child, x, testY)
+            if (hit != null) return hit
+        }
+        return if (root.containsPoint(x, y)) root else null
+    }
+}
+
+enum class WidgetEventType(val id: String) {
+    CLICK("on_click"),
+    CHANGE("on_change"),
+    HOVER_ENTER("on_hover_enter"),
+    HOVER_EXIT("on_hover_exit"),
+    SCROLL("on_scroll"),
+    KEY("on_key");
+
+    val clientId: String get() = "${id}_client"
+}
+
+data class WidgetEvent(
+    val type: WidgetEventType,
+    val widgetId: String,
+    val data: Map<String, Double> = emptyMap()
+)

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/layout/LayoutEngine.kt

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.layout
+
+import com.cobblemon.mod.common.api.molangui.widget.WidgetInstance
+import com.bedrockk.molang.runtime.MoLangRuntime
+
+object LayoutEngine {
+
+    fun layout(root: WidgetInstance, screenWidth: Float, screenHeight: Float, runtime: MoLangRuntime): Unit = root.withItemContext(runtime) {
+        require(screenWidth.isFinite() && screenHeight.isFinite() && screenWidth >= 0f && screenHeight >= 0f) {
+            "invalid screen dimensions"
+        }
+        if (!root.visible) return@withItemContext
+        root.computedWidth = root.widthExpr.resolve(screenWidth, runtime)
+        root.computedHeight = root.heightExpr.resolve(screenHeight, runtime)
+        val anchor = root.definition.getAnchor()
+        val offsetX = root.offsetXExpr.resolve(screenWidth, runtime)
+        val offsetY = root.offsetYExpr.resolve(screenHeight, runtime)
+        root.absoluteX = (screenWidth - root.computedWidth) * anchor.xFactor + offsetX
+        root.absoluteY = (screenHeight - root.computedHeight) * anchor.yFactor + offsetY
+        validateBounds(root)
+        layoutChildren(root, runtime)
+    }
+
+    private fun layoutChildren(parent: WidgetInstance, runtime: MoLangRuntime): Unit = parent.withItemContext(runtime) {
+        val layout = parent.definition.getStringProperty("layout")
+        val spacing = parent.definition.getProperty("spacing")?.resolveFloat(runtime) ?: 0f
+        require(spacing.isFinite()) { "non-finite spacing at '${parent.definition.id}'" }
+        val padding = parent.paddingProperties.map { it.resolveFloat(runtime) }
+        require(padding.size == 4 && padding.all { it.isFinite() && it >= 0f }) {
+            "invalid padding at '${parent.definition.id}'"
+        }
+        val innerWidth = (parent.computedWidth - padding[3] - padding[1]).coerceAtLeast(0f)
+        val innerHeight = (parent.computedHeight - padding[0] - padding[2]).coerceAtLeast(0f)
+        val innerX = parent.absoluteX + padding[3]
+        val innerY = parent.absoluteY + padding[0]
+
+        for (child in parent.children) {
+            if (!child.visible) continue
+            child.computedWidth = child.withItemContext(runtime) { child.widthExpr.resolve(innerWidth, runtime) }
+            child.computedHeight = child.withItemContext(runtime) { child.heightExpr.resolve(innerHeight, runtime) }
+        }
+
+        when (layout) {
+            "stack_vertical" -> layoutStackVertical(parent, innerX, innerY, innerWidth, innerHeight, spacing, runtime)
+            "stack_horizontal" -> layoutStackHorizontal(parent, innerX, innerY, innerWidth, innerHeight, spacing, runtime)
+            "grid" -> layoutGrid(parent, innerX, innerY, innerWidth, spacing, runtime)
+            else -> layoutAnchored(parent, innerX, innerY, innerWidth, innerHeight, runtime)
+        }
+
+        for (child in parent.children) {
+            if (!child.visible) continue
+            validateBounds(child)
+            layoutChildren(child, runtime)
+        }
+    }
+
+    private fun layoutAnchored(parent: WidgetInstance, innerX: Float, innerY: Float, innerWidth: Float, innerHeight: Float, runtime: MoLangRuntime) {
+        for (child in parent.children) {
+            if (!child.visible) continue
+            val anchor = child.definition.getAnchor()
+            val offsetX = child.withItemContext(runtime) { child.offsetXExpr.resolve(innerWidth, runtime) }
+            val offsetY = child.withItemContext(runtime) { child.offsetYExpr.resolve(innerHeight, runtime) }
+            child.absoluteX = innerX + (innerWidth - child.computedWidth) * anchor.xFactor + offsetX
+            child.absoluteY = innerY + (innerHeight - child.computedHeight) * anchor.yFactor + offsetY
+        }
+    }
+
+    private fun layoutStackVertical(parent: WidgetInstance, innerX: Float, innerY: Float, innerWidth: Float, innerHeight: Float, spacing: Float, runtime: MoLangRuntime) {
+        val visibleChildren = parent.children.filter { it.visible }
+        resolveFillSizes(visibleChildren, innerHeight, spacing, isVertical = true)
+        var currentY = innerY
+        for (child in visibleChildren) {
+            child.absoluteX = innerX + child.withItemContext(runtime) { child.offsetXExpr.resolve(innerWidth, runtime) }
+            child.absoluteY = currentY + child.withItemContext(runtime) { child.offsetYExpr.resolve(innerHeight, runtime) }
+            currentY += child.computedHeight + spacing
+        }
+    }
+
+    private fun layoutStackHorizontal(parent: WidgetInstance, innerX: Float, innerY: Float, innerWidth: Float, innerHeight: Float, spacing: Float, runtime: MoLangRuntime) {
+        val visibleChildren = parent.children.filter { it.visible }
+        resolveFillSizes(visibleChildren, innerWidth, spacing, isVertical = false)
+        var currentX = innerX
+        for (child in visibleChildren) {
+            child.absoluteX = currentX + child.withItemContext(runtime) { child.offsetXExpr.resolve(innerWidth, runtime) }
+            child.absoluteY = innerY + child.withItemContext(runtime) { child.offsetYExpr.resolve(innerHeight, runtime) }
+            currentX += child.computedWidth + spacing
+        }
+    }
+
+    private fun layoutGrid(parent: WidgetInstance, innerX: Float, innerY: Float, innerWidth: Float, spacing: Float, runtime: MoLangRuntime) {
+        val columns = (parent.definition.getProperty("columns")?.resolveInt(runtime) ?: 1).coerceIn(1, 256)
+        val visibleChildren = parent.children.filter { it.visible }
+        val cellWidth = ((innerWidth - spacing * (columns - 1)) / columns).coerceAtLeast(0f)
+        var col = 0
+        var currentY = innerY
+        var rowHeight = 0f
+        for (child in visibleChildren) {
+            if (child.widthExpr is SizeExpression.Fill) child.computedWidth = cellWidth
+            child.absoluteX = innerX + col * (cellWidth + spacing)
+            child.absoluteY = currentY
+            rowHeight = maxOf(rowHeight, child.computedHeight)
+            col++
+            if (col >= columns) {
+                col = 0
+                currentY += rowHeight + spacing
+                rowHeight = 0f
+            }
+        }
+    }
+
+    private fun resolveFillSizes(children: List<WidgetInstance>, totalSpace: Float, spacing: Float, isVertical: Boolean) {
+        val totalSpacing = spacing * (children.size - 1).coerceAtLeast(0)
+        var usedSpace = totalSpacing
+        var fillCount = 0
+        for (child in children) {
+            val expr = if (isVertical) child.heightExpr else child.widthExpr
+            if (expr is SizeExpression.Fill) {
+                fillCount++
+            } else {
+                usedSpace += if (isVertical) child.computedHeight else child.computedWidth
+            }
+        }
+        if (fillCount > 0) {
+            val fillSize = ((totalSpace - usedSpace) / fillCount).coerceAtLeast(0f)
+            for (child in children) {
+                val expr = if (isVertical) child.heightExpr else child.widthExpr
+                if (expr is SizeExpression.Fill) {
+                    if (isVertical) child.computedHeight = fillSize else child.computedWidth = fillSize
+                }
+            }
+        }
+    }
+
+    private fun validateBounds(widget: WidgetInstance) {
+        fun validAxis(position: Float, size: Float): Boolean =
+            position.isFinite() && size.isFinite() && size >= 0f && size.toDouble() <= Int.MAX_VALUE &&
+                position.toDouble() >= Int.MIN_VALUE && position.toDouble() + size.toDouble() <= Int.MAX_VALUE
+
+        require(validAxis(widget.absoluteX, widget.computedWidth) && validAxis(widget.absoluteY, widget.computedHeight)) {
+            "widget '${widget.definition.id}' has invalid or overflowing bounds"
+        }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/layout/SizeExpression.kt

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.layout
+
+import com.cobblemon.mod.common.api.molang.ExpressionLike
+import com.cobblemon.mod.common.util.asExpressionLike
+import com.bedrockk.molang.runtime.MoLangRuntime
+import com.cobblemon.mod.common.api.molangui.widget.WidgetExpression
+
+sealed class SizeExpression {
+    abstract fun resolve(parentSize: Float, runtime: MoLangRuntime): Float
+
+    data class Pixels(val value: Float) : SizeExpression() {
+        init { require(value.isFinite()) { "pixel size must be finite" } }
+        override fun resolve(parentSize: Float, runtime: MoLangRuntime) = value
+    }
+
+    data class Percent(val fraction: Float) : SizeExpression() {
+        init { require(fraction.isFinite()) { "percentage must be finite" } }
+        override fun resolve(parentSize: Float, runtime: MoLangRuntime) = parentSize * fraction
+    }
+
+    data class PercentWithOffset(val fraction: Float, val offset: Float) : SizeExpression() {
+        init { require(fraction.isFinite() && offset.isFinite()) { "percentage and offset must be finite" } }
+        override fun resolve(parentSize: Float, runtime: MoLangRuntime) = parentSize * fraction + offset
+    }
+
+    data object Fill : SizeExpression() {
+        override fun resolve(parentSize: Float, runtime: MoLangRuntime) = parentSize
+    }
+
+    data class MolangSize(val expression: ExpressionLike) : SizeExpression() {
+        override fun resolve(parentSize: Float, runtime: MoLangRuntime) = expression.resolveFloat(runtime)
+    }
+
+    companion object {
+        private val PERCENT_PATTERN = Regex("""^(\d+(?:\.\d+)?)%$""")
+        private val PERCENT_OFFSET_PATTERN = Regex("""^(\d+(?:\.\d+)?)%\s*([+-])\s*(\d+(?:\.\d+)?)$""")
+
+        fun parse(value: Any): SizeExpression {
+            return when (value) {
+                is Number -> Pixels(value.toFloat())
+                is String -> parseString(value)
+                is WidgetExpression -> MolangSize(value.source.asExpressionLike())
+                else -> throw IllegalArgumentException("size must be a number, percentage, fill, or explicit Molang expression")
+            }
+        }
+
+        private fun parseString(value: String): SizeExpression {
+            val trimmed = value.trim()
+            return when {
+                trimmed == "fill" -> Fill
+                trimmed.toFloatOrNull() != null -> Pixels(trimmed.toFloat())
+                PERCENT_PATTERN.matches(trimmed) -> {
+                    val pct = PERCENT_PATTERN.matchEntire(trimmed)!!.groupValues[1].toFloat()
+                    Percent(pct / 100f)
+                }
+                PERCENT_OFFSET_PATTERN.matches(trimmed) -> {
+                    val match = PERCENT_OFFSET_PATTERN.matchEntire(trimmed)!!
+                    val pct = match.groupValues[1].toFloat() / 100f
+                    val sign = if (match.groupValues[2] == "+") 1f else -1f
+                    val offset = match.groupValues[3].toFloat() * sign
+                    PercentWithOffset(pct, offset)
+                }
+                else -> throw IllegalArgumentException("invalid size '$value'; Molang requires an explicit expression object")
+            }
+        }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/template/TemplateLibraryRegistry.kt

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.template
+
+import com.google.gson.Gson
+import com.google.gson.JsonObject
+import com.google.gson.JsonElement
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.packs.resources.ResourceManager
+import com.cobblemon.mod.common.Cobblemon
+
+
+object TemplateLibraryRegistry {
+    private val gson = Gson()
+    private val libraries: MutableMap<ResourceLocation, Map<String, TemplateDefinition>> = mutableMapOf()
+
+    private const val DIRECTORY = "molang_ui/templates"
+
+    fun reload(manager: ResourceManager) {
+        val next = mutableMapOf<ResourceLocation, Map<String, TemplateDefinition>>()
+        val resources = manager.listResources(DIRECTORY) { it.path.endsWith(".json") }
+        for ((location, resource) in resources) {
+            try {
+                val json = resource.openAsReader().use { gson.fromJson(it, JsonObject::class.java) }
+                val namespace = location.namespace
+                val name = location.path.removePrefix("$DIRECTORY/").removeSuffix(".json")
+                val libraryId = ResourceLocation.fromNamespaceAndPath(namespace, name)
+                val templates = parseTemplates(json, namespace)
+                next[libraryId] = templates
+            } catch (e: Exception) {
+                Cobblemon.LOGGER.error("Rejected Molang UI template library '$location': ${e.message}")
+            }
+        }
+        libraries.clear()
+        libraries.putAll(next)
+    }
+
+    fun getTemplate(qualifiedName: String): TemplateDefinition? {
+        val dotIndex = qualifiedName.lastIndexOf('.')
+        if (dotIndex == -1) return null
+        val libraryName = qualifiedName.substring(0, dotIndex)
+        val templateName = qualifiedName.substring(dotIndex + 1)
+        val library = if (':' in libraryName) {
+            ResourceLocation.tryParse(libraryName)?.let(libraries::get)
+        } else {
+            libraries.entries.singleOrNull { it.key.path == libraryName }?.value
+        }
+        return library?.get(templateName)
+    }
+
+    private fun parseTemplates(json: JsonObject, namespace: String): Map<String, TemplateDefinition> {
+        val result = mutableMapOf<String, TemplateDefinition>()
+        val templatesObj = json.getAsJsonObject("templates") ?: return result
+        for ((name, element) in templatesObj.entrySet()) {
+            val templateJson = element.asJsonObject
+            val inputs = mutableMapOf<String, TemplateInput>()
+            templateJson.getAsJsonObject("inputs")?.let { inputsObj ->
+                for ((inputName, inputEl) in inputsObj.entrySet()) {
+                    val inputObj = inputEl.asJsonObject
+                    val type = TemplateInputType.fromId(inputObj.get("type")?.asString ?: "string")
+                        ?: throw IllegalArgumentException("unknown template input type for '$inputName'")
+                    val default = inputObj.get("default")
+                    require(default == null || type.accepts(default)) { "invalid template default at '$name.$inputName'" }
+                    inputs[inputName] = TemplateInput(type, default)
+                }
+            }
+            val extends = templateJson.get("extends")?.asString
+            result[name] = TemplateDefinition(
+                name = name,
+                namespace = namespace,
+                inputs = inputs,
+                extends = extends,
+                body = templateJson
+            )
+        }
+        return result
+    }
+}
+
+data class TemplateDefinition(
+    val name: String,
+    val namespace: String,
+    val inputs: Map<String, TemplateInput> = emptyMap(),
+    val extends: String? = null,
+    val body: JsonObject
+)
+
+data class TemplateInput(
+    val type: TemplateInputType = TemplateInputType.STRING,
+    val default: JsonElement? = null
+)
+
+enum class TemplateInputType(val id: String) {
+    STRING("string"), NUMBER("number"), BOOLEAN("boolean"), EXPRESSION("expression"), OBJECT("object"), ARRAY("array");
+
+    fun accepts(value: JsonElement): Boolean = when (this) {
+        STRING -> value.isJsonPrimitive && value.asJsonPrimitive.isString
+        NUMBER -> value.isJsonPrimitive && value.asJsonPrimitive.isNumber && value.asDouble.isFinite()
+        BOOLEAN -> value.isJsonPrimitive && value.asJsonPrimitive.isBoolean
+        EXPRESSION -> value.isJsonObject && value.asJsonObject.size() == 1 && value.asJsonObject.get("molang")?.let {
+            it.isJsonPrimitive && it.asJsonPrimitive.isString
+        } == true
+        OBJECT -> value.isJsonObject
+        ARRAY -> value.isJsonArray
+    }
+
+    companion object { fun fromId(id: String) = entries.firstOrNull { it.id == id } }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/template/TemplateResolver.kt

@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.template
+
+import com.cobblemon.mod.common.api.molangui.widget.WidgetTree
+import com.google.gson.JsonArray
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+import com.google.gson.JsonPrimitive
+
+object TemplateResolver {
+    fun resolve(root: JsonObject, localTemplates: Map<String, TemplateDefinition>): JsonObject =
+        Resolution(localTemplates).resolveNode(root, emptyList(), 1)
+
+    private class Resolution(private val localTemplates: Map<String, TemplateDefinition>) {
+        private var nodes = 0
+        private var values = 0
+
+        fun resolveNode(node: JsonObject, chain: List<String>, depth: Int): JsonObject {
+            require(depth <= WidgetTree.MAX_DEPTH) { "template expansion exceeds maximum widget depth ${WidgetTree.MAX_DEPTH}" }
+            require(++nodes <= WidgetTree.MAX_NODES) { "template expansion exceeds maximum widget count ${WidgetTree.MAX_NODES}" }
+            val result = JsonObject()
+            node.entrySet().filter { it.key != "controls" && it.key != "item_template" }.forEach { (key, value) ->
+                result.add(key, copy(value))
+            }
+            node.getAsJsonArray("controls")?.let { controls ->
+                val resolvedControls = JsonArray()
+                controls.forEach { element ->
+                    val wrapper = element.takeIf(JsonElement::isJsonObject)?.asJsonObject
+                        ?: throw IllegalArgumentException("control entries must be objects")
+                    require(wrapper.size() == 1) { "control entries must contain exactly one widget" }
+                    val (key, value) = wrapper.entrySet().single()
+                    val output = JsonObject()
+                    require(value.isJsonObject) { "widget '$key' must be an object" }
+                    output.add(key.substringBefore('@'), resolveWidgetEntry(key, value.asJsonObject, chain, depth + 1))
+                    resolvedControls.add(output)
+                }
+                result.add("controls", resolvedControls)
+            }
+            node.getAsJsonObject("item_template")?.let {
+                result.add("item_template", resolveNode(it, chain, depth + 1))
+            }
+            return result
+        }
+
+        private fun resolveWidgetEntry(
+            key: String,
+            overrides: JsonObject,
+            chain: List<String>,
+            depth: Int
+        ): JsonObject {
+            if ('@' !in key) return resolveNode(overrides, chain, depth)
+            val templateRef = key.substringAfter('@')
+            require(templateRef !in chain) { "template expansion cycle: ${(chain + templateRef).joinToString(" -> ")}" }
+            require(depth <= WidgetTree.MAX_DEPTH) { "template expansion exceeds maximum widget depth ${WidgetTree.MAX_DEPTH}" }
+            val template = findTemplate(templateRef)
+                ?: throw IllegalArgumentException("missing template '$templateRef'")
+            val inherited = resolveTemplateChain(templateRef, template, emptyList())
+            val inputs = inherited.inputs.mapValues { (name, input) ->
+                val supplied = overrides.get(name)
+                val value = supplied ?: input.default
+                    ?: throw IllegalArgumentException("missing required template input '$name' for '$templateRef'")
+                require(input.type.accepts(value)) {
+                    "template input '$name' for '$templateRef' must be ${input.type.id}"
+                }
+                value
+            }
+            val substituted = copy(inherited.body, inputs).asJsonObject
+            val nonInputs = JsonObject().also { obj ->
+                overrides.entrySet().filter { it.key !in inherited.inputs }.forEach { (name, value) -> obj.add(name, value) }
+            }
+            return resolveNode(mergeJson(substituted, nonInputs), chain + templateRef, depth)
+        }
+
+        private fun resolveTemplateChain(
+            ref: String,
+            template: TemplateDefinition,
+            chain: List<String>
+        ): TemplateDefinition {
+            require(ref !in chain) { "template inheritance cycle: ${(chain + ref).joinToString(" -> ")}" }
+            require(chain.size < WidgetTree.MAX_DEPTH) { "template inheritance exceeds maximum depth ${WidgetTree.MAX_DEPTH}" }
+            val nextChain = chain + ref
+            val body = JsonObject().also { obj ->
+                template.body.entrySet().filter { it.key != "inputs" && it.key != "extends" }
+                    .forEach { (name, value) -> obj.add(name, value) }
+            }
+            val parentRef = template.extends ?: return template.copy(body = body)
+            val parent = findTemplate(parentRef)
+                ?: throw IllegalArgumentException("missing parent template '$parentRef' referenced by '$ref'")
+            val inherited = resolveTemplateChain(parentRef, parent, nextChain)
+            return template.copy(inputs = inherited.inputs + template.inputs, body = mergeJson(inherited.body, body))
+        }
+
+        private fun findTemplate(ref: String) =
+            localTemplates[ref] ?: TemplateLibraryRegistry.getTemplate(ref)
+
+        private fun copy(element: JsonElement, inputs: Map<String, JsonElement>? = null, depth: Int = 0): JsonElement {
+            require(depth <= 128) { "template JSON exceeds maximum depth 128" }
+            require(++values <= 1_048_576) { "template expansion exceeds maximum JSON work" }
+            if (inputs != null && element.isJsonPrimitive && element.asJsonPrimitive.isString) {
+                val text = element.asString
+                if (text.startsWith('$') && text.length > 1 && text.indexOf('$', 1) == -1) {
+                    val supplied = inputs[text.substring(1)]
+                        ?: throw IllegalArgumentException("unknown template input reference '$text'")
+                    return copy(supplied, depth = depth + 1)
+                }
+                return JsonPrimitive(text)
+            }
+            if (element.isJsonArray) return JsonArray().also { out -> element.asJsonArray.forEach { out.add(copy(it, inputs, depth + 1)) } }
+            if (element.isJsonObject) return JsonObject().also { out ->
+                element.asJsonObject.entrySet().forEach { (key, value) ->
+                    out.add(key, copy(value, inputs, depth + 1))
+                }
+            }
+            return element.deepCopy()
+        }
+
+        private fun mergeJson(base: JsonObject, overlay: JsonObject): JsonObject {
+            val result = copy(base).asJsonObject
+            overlay.entrySet().forEach { (key, value) ->
+                val existing = result.get(key)
+                result.add(key, if (value.isJsonObject && existing?.isJsonObject == true) {
+                    mergeJson(existing.asJsonObject, value.asJsonObject)
+                } else copy(value))
+            }
+            return result
+        }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/widget/WidgetDefinition.kt

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.widget
+
+import com.cobblemon.mod.common.api.molangui.ActionKey
+
+data class WidgetDefinition(
+    val id: String,
+    val type: WidgetType,
+    val properties: Map<String, WidgetProperty> = emptyMap(),
+    val children: List<WidgetDefinition> = emptyList(),
+    val events: Map<String, ServerWidgetEvent> = emptyMap(),
+    val clientEvents: Map<String, String> = emptyMap(),
+    val hoverOverrides: Map<String, WidgetProperty> = emptyMap(),
+    val itemTemplate: WidgetDefinition? = null
+) {
+    fun getProperty(name: String): WidgetProperty? = properties[name]
+    fun getStringProperty(name: String): String? = (properties[name]?.raw as? String)
+    fun getAnchor(): Anchor = Anchor.fromId(getStringProperty("anchor") ?: "top_left")
+}
+
+data class ServerWidgetEvent(
+    val action: ActionKey,
+    val parameters: Map<String, WidgetProperty> = emptyMap()
+)
+
+enum class WidgetType(val id: String) {
+    PANEL("panel"),
+    LABEL("label"),
+    IMAGE("image"),
+    FILL("fill"),
+    BUTTON("button"),
+    LIST("list"),
+    PROGRESS_BAR("progress_bar"),
+    SCROLL_PANEL("scroll_panel"),
+    POKEMON_RENDER("pokemon_render"),
+    NUMBER_INPUT("number_input"),
+    ITEM_SLOT("item_slot"),
+    SLOT_GRID("slot_grid");
+
+    companion object {
+        private val BY_ID = entries.associateBy { it.id }
+        fun fromId(id: String): WidgetType? = BY_ID[id]
+    }
+}
+
+enum class Anchor(val id: String, val xFactor: Float, val yFactor: Float) {
+    TOP_LEFT("top_left", 0f, 0f),
+    TOP_CENTER("top_center", 0.5f, 0f),
+    TOP_RIGHT("top_right", 1f, 0f),
+    CENTER_LEFT("center_left", 0f, 0.5f),
+    CENTER("center", 0.5f, 0.5f),
+    CENTER_RIGHT("center_right", 1f, 0.5f),
+    BOTTOM_LEFT("bottom_left", 0f, 1f),
+    BOTTOM_CENTER("bottom_center", 0.5f, 1f),
+    BOTTOM_RIGHT("bottom_right", 1f, 1f);
+
+    companion object {
+        private val BY_ID = entries.associateBy { it.id }
+        fun fromId(id: String): Anchor = BY_ID[id] ?: TOP_LEFT
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/widget/WidgetExpansion.kt

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.widget
+
+import com.bedrockk.molang.runtime.MoLangRuntime
+import com.bedrockk.molang.runtime.struct.QueryStruct
+import com.bedrockk.molang.runtime.value.DoubleValue
+import com.bedrockk.molang.runtime.value.MoValue
+import com.bedrockk.molang.runtime.value.StringValue
+import com.cobblemon.mod.common.api.molangui.MolangUiPacketLimits
+import com.cobblemon.mod.common.api.molangui.layout.SizeExpression
+import com.google.gson.JsonElement
+import com.google.gson.JsonParser
+
+internal object WidgetExpansion {
+    private data class Node(val definition: WidgetDefinition, val context: QueryStruct?, val children: List<Node>)
+
+    fun refresh(definition: WidgetDefinition, runtime: MoLangRuntime, previous: WidgetInstance? = null): WidgetInstance {
+        var count = 0
+        fun plan(def: WidgetDefinition, context: QueryStruct?, depth: Int): Node = withItemContext(runtime, context) {
+            require(depth <= WidgetTree.MAX_DEPTH && ++count <= WidgetTree.MAX_NODES) {
+                "expanded widget tree exceeds ${WidgetTree.MAX_NODES} widgets or depth ${WidgetTree.MAX_DEPTH}"
+            }
+            val children = if (def.type == WidgetType.LIST) {
+                val template = requireNotNull(def.itemTemplate) { "list '${def.id}' requires item_template" }
+                items(def, runtime).mapIndexed { index, values ->
+                    val item = QueryStruct(hashMapOf())
+                    values.forEach { (key, value) -> item.addFunction(key) { value } }
+                    item.addFunction("index") { DoubleValue(index.toDouble()) }
+                    plan(template.copy(id = "${template.id}[$index]"), item, depth + 1)
+                }
+            } else def.children.map { plan(it, context, depth + 1) }
+            Node(def, context, children)
+        }
+        val planned = plan(definition, null, 1)
+        fun apply(node: Node, old: WidgetInstance?, parent: WidgetInstance?): WidgetInstance {
+            val widget = old?.takeIf { it.definition == node.definition } ?: WidgetInstance(node.definition, parent).apply {
+                val size = node.definition.getProperty("size")?.raw as? List<*>
+                if (size?.size == 2) {
+                    widthExpr = SizeExpression.parse(size[0] ?: 0)
+                    heightExpr = SizeExpression.parse(size[1] ?: 0)
+                }
+                val offset = node.definition.getProperty("offset")?.raw as? List<*>
+                if (offset?.size == 2) {
+                    offsetXExpr = SizeExpression.parse(offset[0] ?: 0)
+                    offsetYExpr = SizeExpression.parse(offset[1] ?: 0)
+                }
+            }
+            widget.itemContext = node.context
+            val children = node.children.mapIndexed { index, child -> apply(child, widget.children.getOrNull(index), widget) }
+            widget.children.clear()
+            widget.children.addAll(children)
+            return widget
+        }
+        return apply(planned, previous, null)
+    }
+
+    private fun items(definition: WidgetDefinition, runtime: MoLangRuntime): List<Map<String, MoValue>> =
+        when (definition.getStringProperty("source_type") ?: "data") {
+            "count" -> {
+                val count = definition.getProperty("source")?.resolveDouble(runtime) ?: 0.0
+                require(count.isFinite() && count in 0.0..WidgetTree.MAX_NODES.toDouble() && count % 1.0 == 0.0) {
+                    "list '${definition.id}' requires a whole count between 0 and ${WidgetTree.MAX_NODES}"
+                }
+                List(count.toInt()) { emptyMap() }
+            }
+            "data" -> {
+                val source = definition.getProperty("source")?.resolveString(runtime) ?: "[]"
+                require(source.length <= MolangUiPacketLimits.MAX_VALUE_LENGTH) { "list '${definition.id}' source is too large" }
+                val array = JsonParser.parseString(source).asJsonArray
+                require(array.size() <= WidgetTree.MAX_NODES) { "list '${definition.id}' has too many items" }
+                array.map { element -> element.asJsonObject.entrySet().associate { (key, item) -> key to value(item) } }
+            }
+            else -> throw IllegalArgumentException("unsupported list source_type at '${definition.id}'")
+        }
+
+    private fun value(element: JsonElement): MoValue {
+        if (!element.isJsonPrimitive) return StringValue(element.toString())
+        val primitive = element.asJsonPrimitive
+        return when {
+            primitive.isBoolean -> DoubleValue(primitive.asBoolean)
+            primitive.isNumber -> DoubleValue(primitive.asDouble.also { require(it.isFinite()) { "non-finite list item value" } })
+            else -> StringValue(primitive.asString)
+        }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/widget/WidgetInstance.kt

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.widget
+
+import com.cobblemon.mod.common.api.molangui.layout.SizeExpression
+import com.bedrockk.molang.runtime.MoLangRuntime
+import com.bedrockk.molang.runtime.struct.QueryStruct
+
+class WidgetInstance(
+    val definition: WidgetDefinition,
+    val parent: WidgetInstance? = null
+) {
+    var absoluteX: Float = 0f
+    var absoluteY: Float = 0f
+    var computedWidth: Float = 0f
+    var computedHeight: Float = 0f
+
+    var widthExpr: SizeExpression = SizeExpression.Pixels(0f)
+    var heightExpr: SizeExpression = SizeExpression.Pixels(0f)
+    var offsetXExpr: SizeExpression = SizeExpression.Pixels(0f)
+    var offsetYExpr: SizeExpression = SizeExpression.Pixels(0f)
+
+    internal val paddingProperties: List<WidgetProperty> =
+        (definition.getProperty("padding")?.raw as? List<*>)?.map {
+            when (it) {
+                is Number -> WidgetProperty.literal(it)
+                is WidgetExpression -> WidgetProperty.molang(it.source)
+                else -> throw IllegalArgumentException("invalid padding at '${definition.id}'")
+            }
+        } ?: List(4) { WidgetProperty.literal(0) }
+
+    val children: MutableList<WidgetInstance> = mutableListOf()
+
+    var visible: Boolean = true
+    var enabled: Boolean = true
+    var hovered: Boolean = false
+
+    var scrollOffset: Float = 0f
+    var rendererState: Any? = null
+    var itemContext: QueryStruct? = null
+
+    inline fun <T> withItemContext(runtime: MoLangRuntime, action: () -> T): T =
+        withItemContext(runtime, itemContext, action)
+
+    fun containsPoint(x: Float, y: Float): Boolean {
+        return x >= absoluteX && x <= absoluteX + computedWidth &&
+               y >= absoluteY && y <= absoluteY + computedHeight
+    }
+}
+
+inline fun <T> withItemContext(runtime: MoLangRuntime, context: QueryStruct?, action: () -> T): T {
+    val functions = runtime.environment.query.functions
+    val previous = functions.remove("item")
+    if (context != null) runtime.environment.query.addFunction("item") { context }
+    try {
+        return action()
+    } finally {
+        functions.remove("item")
+        if (previous != null) functions["item"] = previous
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/widget/WidgetProperty.kt

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.widget
+
+import com.cobblemon.mod.common.api.molang.ExpressionLike
+import com.cobblemon.mod.common.util.asExpressionLike
+import com.bedrockk.molang.runtime.MoLangRuntime
+
+class WidgetProperty private constructor(val raw: Any, expressionSource: String?) {
+    val expression: ExpressionLike? = expressionSource?.asExpressionLike()
+
+    fun resolveDouble(runtime: MoLangRuntime): Double {
+        return expression?.resolveDouble(runtime) ?: when (raw) {
+            is Number -> raw.toDouble()
+            is String -> parseNumericString(raw)
+            is Boolean -> if (raw) 1.0 else 0.0
+            else -> 0.0
+        }
+    }
+
+    fun resolveString(runtime: MoLangRuntime): String {
+        return expression?.resolveString(runtime) ?: raw.toString()
+    }
+
+    fun resolveBoolean(runtime: MoLangRuntime): Boolean {
+        return expression?.resolveBoolean(runtime) ?: when (raw) {
+            is Boolean -> raw
+            is Number -> raw.toDouble() != 0.0
+            is String -> raw.toBooleanStrictOrNull() ?: (raw.isNotEmpty())
+            else -> false
+        }
+    }
+
+    fun resolveInt(runtime: MoLangRuntime): Int {
+        if (expression == null && raw is String && raw.startsWith("0x", ignoreCase = true)) {
+            return raw.substring(2).toLongOrNull(16)?.toInt() ?: 0
+        }
+        return resolveDouble(runtime).toInt()
+    }
+
+    fun resolveFloat(runtime: MoLangRuntime): Float = resolveDouble(runtime).toFloat()
+
+    companion object {
+        fun literal(value: Any): WidgetProperty = WidgetProperty(value, null)
+        fun molang(source: String): WidgetProperty = WidgetProperty(source, source)
+
+        private fun parseNumericString(value: String): Double {
+            value.toDoubleOrNull()?.let { return it }
+            if (value.startsWith("0x", ignoreCase = true)) {
+                value.substring(2).toLongOrNull(16)?.let { return it.toDouble() }
+            }
+            return 0.0
+        }
+    }
+}
+
+data class WidgetExpression(val source: String)

common/src/main/kotlin/com/cobblemon/mod/common/api/molangui/widget/WidgetTree.kt

@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.molangui.widget
+
+import com.cobblemon.mod.common.api.molangui.layout.SizeExpression
+import com.cobblemon.mod.common.api.molangui.ActionKey
+import com.cobblemon.mod.common.api.molangui.requireUiString
+import com.cobblemon.mod.common.api.molangui.template.TemplateDefinition
+import com.cobblemon.mod.common.api.molangui.template.TemplateInput
+import com.cobblemon.mod.common.api.molangui.template.TemplateInputType
+import com.cobblemon.mod.common.api.molangui.template.TemplateResolver
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+
+object WidgetTree {
+    const val MAX_DEPTH = 32
+    const val MAX_NODES = 2048
+    private val UNSUPPORTED_PROPERTIES = setOf(
+        "transition", "enter", "exit", "static", "on_submit", "on_submit_client", "on_slot_change", "on_slot_change_client"
+    )
+    private val EVENT_NAMES = setOf(
+        "on_click", "on_change", "on_hover_enter", "on_hover_exit", "on_scroll", "on_key"
+    )
+
+    fun parse(guiJson: JsonObject): WidgetDefinition {
+        val localTemplates = parseLocalTemplates(guiJson)
+        val rootJson = guiJson.getAsJsonObject("root")
+            ?: throw IllegalArgumentException("UI definition is missing 'root'")
+        val resolved = TemplateResolver.resolve(rootJson, localTemplates)
+        val ids = mutableSetOf<String>()
+        val count = intArrayOf(0)
+        return parseWidget("root", resolved, ids, 1, count)
+    }
+
+    fun parseWidget(id: String, json: JsonObject): WidgetDefinition =
+        parseWidget(id, json, mutableSetOf(), 1, intArrayOf(0))
+
+    private fun parseWidget(
+        id: String,
+        json: JsonObject,
+        ids: MutableSet<String>,
+        depth: Int,
+        count: IntArray
+    ): WidgetDefinition {
+        require(id.isNotBlank() && id.length <= 128) { "invalid widget id '$id'" }
+        require(ids.add(id)) { "duplicate widget id '$id'" }
+        require(depth <= MAX_DEPTH) { "widget tree exceeds maximum depth $MAX_DEPTH at '$id'" }
+        count[0]++
+        require(count[0] <= MAX_NODES) { "widget tree exceeds maximum node count $MAX_NODES" }
+
+        val typeName = json.get("type")?.asString ?: "panel"
+        val type = WidgetType.fromId(typeName)
+            ?: throw IllegalArgumentException("unsupported widget renderer '$typeName' at '$id'")
+        val properties = linkedMapOf<String, WidgetProperty>()
+        val events = linkedMapOf<String, ServerWidgetEvent>()
+        val clientEvents = linkedMapOf<String, String>()
+        var hoverOverrides = emptyMap<String, WidgetProperty>()
+        val reserved = setOf("type", "controls", "item_template", "hover", "inputs", "extends")
+        json.entrySet().forEach { (key, value) ->
+            require(key !in UNSUPPORTED_PROPERTIES) { "unsupported widget property '$id.$key'" }
+            when {
+                key.endsWith("_client") && key.removeSuffix("_client") in EVENT_NAMES ->
+                    clientEvents[key] = readExpression(value, "$id.$key")
+                key in EVENT_NAMES -> {
+                    events[key] = parseServerEvent(value, "$id.$key")
+                }
+                key == "hover" && value.isJsonObject -> hoverOverrides = parsePropertyMap(value.asJsonObject, "$id.hover")
+                key !in reserved -> properties[key] = parseProperty(value, "$id.$key")
+            }
+        }
+
+        val children = mutableListOf<WidgetDefinition>()
+        json.getAsJsonArray("controls")?.forEach { element ->
+            require(element.isJsonObject && element.asJsonObject.size() == 1) { "controls under '$id' must be single-entry objects" }
+            val (childId, childValue) = element.asJsonObject.entrySet().single()
+            require(childValue.isJsonObject) { "widget '$childId' must be an object" }
+            children += parseWidget(childId, childValue.asJsonObject, ids, depth + 1, count)
+        }
+
+        val itemTemplate = json.getAsJsonObject("item_template")?.let { template ->
+            parseWidget("$id#item_template", template, ids, depth + 1, count)
+        }
+        validateGeometry(id, type, properties)
+        return WidgetDefinition(
+            id, type, properties.toMap(), children.toList(), events.toMap(), clientEvents.toMap(),
+            hoverOverrides.toMap(), itemTemplate
+        )
+    }
+
+    private fun parseLocalTemplates(guiJson: JsonObject): Map<String, TemplateDefinition> {
+        val result = linkedMapOf<String, TemplateDefinition>()
+        guiJson.getAsJsonObject("templates")?.entrySet()?.forEach { (name, element) ->
+            val body = element.asJsonObject
+            val inputs = linkedMapOf<String, TemplateInput>()
+            body.getAsJsonObject("inputs")?.entrySet()?.forEach { (inputName, inputElement) ->
+                val input = inputElement.asJsonObject
+                val type = TemplateInputType.fromId(input.get("type")?.asString ?: "string")
+                    ?: throw IllegalArgumentException("unknown template input type at '$name.$inputName'")
+                val default = input.get("default")
+                require(default == null || type.accepts(default)) { "invalid template default at '$name.$inputName'" }
+                inputs[inputName] = TemplateInput(type, default)
+            }
+            result[name] = TemplateDefinition(name, "", inputs.toMap(), body.get("extends")?.asString, body)
+        }
+        return result.toMap()
+    }
+
+    private fun parsePropertyMap(json: JsonObject, path: String) = json.entrySet().associate { (key, value) ->
+        key to parseProperty(value, "$path.$key")
+    }
+
+    private fun parseProperty(value: JsonElement, path: String): WidgetProperty {
+        if (value.isJsonObject && value.asJsonObject.has("molang")) {
+            require(value.asJsonObject.size() == 1) {
+                "expression '$path' must contain only a string 'molang' field"
+            }
+            return WidgetProperty.molang(value.asJsonObject.get("molang").requireUiString("$path.molang"))
+        }
+        return WidgetProperty.literal(jsonToLiteral(value, path))
+    }
+
+    private fun jsonToLiteral(element: JsonElement, path: String): Any = when {
+        element.isJsonPrimitive -> element.asJsonPrimitive.let { when {
+            it.isNumber -> it.asDouble.also { number -> require(number.isFinite()) { "non-finite number at '$path'" } }
+            it.isBoolean -> it.asBoolean
+            else -> it.asString
+        } }
+        element.isJsonArray -> element.asJsonArray.mapIndexed { index, item ->
+            if (item.isJsonObject && item.asJsonObject.has("molang")) {
+                require(item.asJsonObject.size() == 1) { "expression '$path[$index]' contains unknown fields" }
+                WidgetExpression(item.asJsonObject.get("molang").requireUiString("$path[$index].molang"))
+            } else jsonToLiteral(item, "$path[$index]")
+        }.toList()
+        element.isJsonObject -> element.asJsonObject.entrySet().associate { (key, item) -> key to jsonToLiteral(item, "$path.$key") }.toMap()
+        else -> throw IllegalArgumentException("null is not a supported widget value at '$path'")
+    }
+
+    private fun readExpression(element: JsonElement, path: String): String {
+        require(element.isJsonObject && element.asJsonObject.size() == 1) { "client event '$path' must be an explicit molang object" }
+        return element.asJsonObject.get("molang").requireUiString("$path.molang").also {
+            require(!it.contains("send_action")) { "client event '$path' may not dispatch server actions" }
+        }
+    }
+
+    private fun parseServerEvent(element: JsonElement, path: String): ServerWidgetEvent {
+        if (element.isJsonPrimitive && element.asJsonPrimitive.isString) {
+            val action = element.asString
+            require(action.startsWith("action@") && action.length > 7) { "server event '$path' must declare exactly one action" }
+            return ServerWidgetEvent(ActionKey(action.substringAfter("action@")))
+        }
+        require(element.isJsonObject) { "server event '$path' must be an object" }
+        val obj = element.asJsonObject
+        val action = ActionKey(obj.get("action")?.asString
+            ?: throw IllegalArgumentException("server event '$path' is missing action"))
+        val parameters = obj.getAsJsonObject("parameters")?.entrySet()?.associate { (name, value) ->
+            name to parseProperty(value, "$path.parameters.$name")
+        }?.toMap() ?: emptyMap()
+        require(obj.keySet().all { it == "action" || it == "parameters" }) { "server event '$path' contains unknown fields" }
+        return ServerWidgetEvent(action, parameters)
+    }
+
+    private fun validateGeometry(id: String, type: WidgetType, properties: Map<String, WidgetProperty>) {
+        listOf("size", "offset", "grid_dimensions", "slot_size", "slot_spacing").forEach { key ->
+            val raw = properties[key]?.raw ?: return@forEach
+            require(raw is List<*> && raw.size == 2) { "'$id.$key' must contain exactly two values" }
+            raw.filterIsInstance<Double>().forEach { require(it.isFinite()) { "non-finite geometry at '$id.$key'" } }
+        }
+        listOf("size", "offset").forEach { key ->
+            (properties[key]?.raw as? List<*>)?.forEach { SizeExpression.parse(requireNotNull(it)) }
+        }
+        properties["padding"]?.raw?.let { padding ->
+            require(padding is List<*> && padding.size == 4 && padding.all { it is Number || it is WidgetExpression }) {
+                "'$id.padding' must contain four numbers or explicit Molang expressions"
+            }
+            padding.filterIsInstance<Number>().forEach {
+                require(it.toFloat().isFinite() && it.toFloat() >= 0f) { "invalid padding at '$id'" }
+            }
+        }
+        if (type == WidgetType.SLOT_GRID) {
+            val dimensions = properties["grid_dimensions"]?.raw as? List<*>
+                ?: throw IllegalArgumentException("slot grid '$id' is missing grid_dimensions")
+            require(dimensions.all { it is Double && it in 1.0..16.0 && it == it.toInt().toDouble() }) {
+                "slot grid '$id' must have integer dimensions in 1..16"
+            }
+            val collectionName = properties["collection_name"]?.raw
+            require(collectionName is String && collectionName.isNotBlank()) { "slot grid '$id' is missing collection_name" }
+        }
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/orientation/OrientationController.kt

@@ -8,10 +8,8 @@
 
 package com.cobblemon.mod.common.api.orientation
 
-import com.cobblemon.mod.common.util.math.QuatSpring
 import com.cobblemon.mod.common.util.math.geometry.toDegrees
 import com.cobblemon.mod.common.util.math.geometry.toRadians
-import com.cobblemon.mod.common.util.math.simpleSpringDamperQuat
 import net.minecraft.client.Minecraft
 import net.minecraft.util.Mth
 import net.minecraft.world.entity.LivingEntity
@@ -28,8 +26,6 @@ open class OrientationController(val entity: LivingEntity) {
         val FORWARDS: Vector3f = Vector3f(0.0f, 0.0f, -1.0f)
         val UP: Vector3f = Vector3f(0.0f, 1.0f, 0.0f)
         val LEFT: Vector3f = Vector3f(-1.0f, 0.0f, 0.0f)
-        private const val TICK_DT = 1f / 20f // Minecraft server tick rate
-        private const val RENDER_SMOOTH_HALFLIFE = 0.1f // seconds to close ~half the gap
     }
 
     open var active: Boolean = false
@@ -37,8 +33,6 @@ open class OrientationController(val entity: LivingEntity) {
     var orientation: Matrix3f? = null
         private set
 
-    private val renderSpring = QuatSpring()
-
     private var renderOrientationO: Matrix3f? = null
     private var renderOrientation: Matrix3f? = null
 
@@ -60,8 +54,6 @@ open class OrientationController(val entity: LivingEntity) {
         orientation = null
         renderOrientationO = null
         renderOrientation = null
-        renderSpring.quat.identity()
-        renderSpring.angVel.set(0f, 0f, 0f)
         active = false
     }
 
@@ -85,26 +77,18 @@ open class OrientationController(val entity: LivingEntity) {
         return oldQuat
     }
 
-    /** Every tick move the current render orientation towards the last known true orientation **/
     fun tick() {
         if (!active || orientation == null) return
         renderOrientationO = renderOrientation
-        val current = orientation!!
-        val targetQuat = Quaternionf().setFromUnnormalized(current)
-
-        if (renderOrientation == null) {
-            // First tick: snap the spring to the target instead of easing in from identity
-            renderSpring.quat.set(targetQuat)
-            renderSpring.angVel.set(0f, 0f, 0f)
-        }
-
-        // Use a "quat spring" to smoothly move the render orientation towards the goal orientation.
-        // It takes into account the orientations angular velocities and should be much more resilient
-        // to sharp changes in goal orientation or late/missed packets.
-        simpleSpringDamperQuat(renderSpring, targetQuat, 0.15f, TICK_DT)
+        val current = orientation
+        val renderMatrix = this.renderOrientation ?: current
+        val renderQuat = Quaternionf().setFromUnnormalized(renderMatrix)
+        val targetQuat  = Quaternionf().setFromUnnormalized(current)
+        val dampingFactor = 0.66f // Smooth interpolation to reduce jitter of orientations recieved from the server.
+        renderQuat.slerp(targetQuat, dampingFactor)
 
         val newRenderOrientation = Matrix3f()
-        renderSpring.quat.get(newRenderOrientation)
+        renderQuat.get(newRenderOrientation)
         renderOrientation = newRenderOrientation
     }
 

common/src/main/kotlin/com/cobblemon/mod/common/api/pokeball/catching/modifiers/CatchRateModifiers.kt

@@ -108,7 +108,7 @@ object CatchRateModifiers {
      * Used by [PokeBalls.SAFARI_BALL].
      * Checks if the target is not battling, if true boost by *1.5
      */
-    val SAFARI = MultiplierModifier(1.5f) { _, poke -> !poke.entity?.isBattling!! }
+    val SAFARI = WorldStateModifier { _, entity -> if (!entity.isBattling) 1.5F else 1F }
 
     /**
      * Used by [PokeBalls.PARK_BALL].

common/src/main/kotlin/com/cobblemon/mod/common/api/pokedex/AbstractPokedexManager.kt

@@ -13,10 +13,6 @@ import com.cobblemon.mod.common.api.molang.MoLangFunctions.addStandardFunctions
 import com.cobblemon.mod.common.api.molang.ObjectValue
 import com.cobblemon.mod.common.api.pokedex.entry.PokedexEntry
 import com.cobblemon.mod.common.api.pokedex.entry.PokedexForm
-import com.cobblemon.mod.common.api.pokemon.PokemonSpecies
-import com.cobblemon.mod.common.api.pokemon.feature.ChoiceSpeciesFeatureProvider
-import com.cobblemon.mod.common.api.pokemon.feature.SpeciesFeatures
-import com.cobblemon.mod.common.api.pokemon.feature.WeightedChoiceSpeciesFeatureProvider
 import com.cobblemon.mod.common.pokedex.scanner.PokedexEntityData
 import com.cobblemon.mod.common.pokemon.Gender
 import net.minecraft.resources.ResourceLocation
@@ -76,57 +72,6 @@ abstract class AbstractPokedexManager {
         } ?: PokedexEntryProgress.UNREGISTERED
     }
 
-    fun getHighestKnowledgeFor(entry: PokedexEntry, form: PokedexForm?): PokedexEntryProgress {
-        if (form == null) return getHighestKnowledgeFor(entry)
-
-        val speciesRecord = getSpeciesRecord(entry.speciesId) ?: return PokedexEntryProgress.UNREGISTERED
-        val hasAllAspects = entry.conditionAspects.all(speciesRecord::hasAspect)
-        if (!hasAllAspects) {
-            return PokedexEntryProgress.UNREGISTERED
-        }
-
-        return speciesRecord.getFormRecord(form.displayForm)?.knowledge ?: PokedexEntryProgress.UNREGISTERED
-    }
-
-    fun getHighestKnowledgeFor(entry: PokedexEntry, form: PokedexForm?, aspects: Iterable<String>): PokedexEntryProgress {
-        val formKnowledge = getHighestKnowledgeFor(entry, form)
-
-        if (formKnowledge == PokedexEntryProgress.UNREGISTERED) return PokedexEntryProgress.UNREGISTERED
-
-        val seenAspects = getSeenAspects(entry)
-
-        // Aspects that select one of the species' own forms are already covered by the form knowledge check above,
-        // so exempt them (and every other value of the same feature, since defaults like "phony" never appear on a form directly).
-        val species = PokemonSpecies.getByIdentifier(entry.speciesId)
-        val formAspects = species?.forms?.flatMapTo(hashSetOf()) { it.aspects } ?: emptySet()
-        val formSelectingFeatureAspects = species?.let(SpeciesFeatures::getFeaturesFor).orEmpty()
-            .mapNotNull { provider ->
-                val allAspects: Collection<String> = when (provider) {
-                    is ChoiceSpeciesFeatureProvider -> provider.getAllAspects()
-                    is WeightedChoiceSpeciesFeatureProvider -> provider.getAllAspects().keys
-                    else -> return@mapNotNull null
-                }
-                allAspects.takeIf { it.any { aspect -> aspect in formAspects } }
-            }
-            .flatten()
-            .toHashSet()
-
-        val allSeenAspects = aspects
-            .filter { aspect ->
-                if (Dexes.equivalentFormsLookup[aspect] != null) return@filter false
-                if (aspect in formAspects || aspect in formSelectingFeatureAspects) return@filter false
-                if (aspect.uppercase() in setOf(Gender.MALE.name, Gender.FEMALE.name, Gender.GENDERLESS.name)) return@filter false
-                if ("shiny".equals(aspect, ignoreCase = true)) return@filter false
-
-                return@filter true
-            }
-            .all { aspect -> seenAspects.contains(aspect) }
-
-        if (!allSeenAspects) return PokedexEntryProgress.UNREGISTERED
-
-        return formKnowledge
-    }
-
     fun getEncounteredForms(entry: PokedexEntry) : List<PokedexForm> {
         return getFormsWithKnowledge(entry, PokedexEntryProgress.SEEN)
     }

common/src/main/kotlin/com/cobblemon/mod/common/api/pokedex/Dexes.kt

@@ -40,17 +40,6 @@ object Dexes : JsonDataRegistry<PokedexDef> {
     //Maps a dex id to its PokedexDef
     val dexEntryMap = linkedMapOf<ResourceLocation, PokedexDef>()
 
-    val equivalentForms = mapOf(
-        "galar" to listOf("region-bias-galar", "bias-galar", "galar-bias", "galarian", "galar"),
-        "alola" to listOf("region-bias-alola", "bias-alola", "alola-bias", "alolan", "alola"),
-        "hisui" to listOf("region-bias-hisui", "bias-hisui", "hisui-bias", "hisuian", "hisui"),
-        "paldea" to listOf("region-bias-paldea", "bias-paldea", "paldea-bias", "paldean", "paldea"),
-    )
-
-    val equivalentFormsLookup = equivalentForms.flatMap { (key, values) ->
-        values.map { it to key }
-    }.toMap()
-
     override fun reload(data: Map<ResourceLocation, PokedexDef>) {
         dexEntryMap.clear()
         data.entries.sortedBy { it.value.sortOrder }.forEach { (id, def) -> dexEntryMap[id] = def }
@@ -60,9 +49,4 @@ object Dexes : JsonDataRegistry<PokedexDef> {
     override fun sync(player: ServerPlayer) {
         PokedexDexSyncPacket(dexEntryMap.values).sendToPlayer(player)
     }
-
-    fun getFormEquivalents(formName: String): List<String> {
-        val key = equivalentFormsLookup[formName.lowercase()]
-        return equivalentForms[key] ?: listOf(formName.lowercase())
-    }
 }

common/src/main/kotlin/com/cobblemon/mod/common/api/pokedex/SpeciesDexRecord.kt

@@ -121,7 +121,6 @@ class SpeciesDexRecord {
 
     fun addAspects(addedAspects: Set<String>) {
         aspects.addAll(addedAspects)
-        pokedexManager.onSpeciesRecordUpdated(this)
     }
 
     /** Returns true if the given Pokémon contains new information. Internal because it's only to be called from [FormDexRecord.wouldBeDifferent]. */

common/src/main/kotlin/com/cobblemon/mod/common/api/pokedex/entry/DexEntries.kt

@@ -8,20 +8,13 @@
 
 package com.cobblemon.mod.common.api.pokedex.entry
 
-import com.cobblemon.mod.common.Cobblemon
-import com.cobblemon.mod.common.CobblemonItems
 import com.cobblemon.mod.common.api.data.JsonDataRegistry
 import com.cobblemon.mod.common.api.molang.ExpressionLike
-import com.cobblemon.mod.common.api.pokemon.PokemonSpecies
 import com.cobblemon.mod.common.api.reactive.SimpleObservable
 import com.cobblemon.mod.common.net.messages.client.data.DexEntrySyncPacket
-import com.cobblemon.mod.common.net.messages.client.data.DexEvolutionDisplaySyncPacket
-import com.cobblemon.mod.common.pokemon.FormData
 import com.cobblemon.mod.common.util.adapters.ExpressionLikeAdapter
 import com.cobblemon.mod.common.util.adapters.IdentifierAdapter
-import com.cobblemon.mod.common.util.asIdentifierDefaultingNamespace
 import com.cobblemon.mod.common.util.cobblemonResource
-import com.cobblemon.mod.common.util.lang
 import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import com.google.gson.reflect.TypeToken
@@ -45,8 +38,6 @@ object DexEntries : JsonDataRegistry<PokedexEntry> {
 
     val entries = mutableMapOf<ResourceLocation, PokedexEntry>()
 
-    val evolutionDisplays = mutableListOf<DexEvolutionDisplay>()
-
     override fun reload(data: Map<ResourceLocation, PokedexEntry>) {
         data.forEach { _, entry ->
             entries[entry.id] = entry
@@ -59,7 +50,6 @@ object DexEntries : JsonDataRegistry<PokedexEntry> {
                 }
             }
         }
-        computeEvolutionDisplays()
         observable.emit(this)
     }
 
@@ -67,58 +57,5 @@ object DexEntries : JsonDataRegistry<PokedexEntry> {
 
     override fun sync(player: ServerPlayer) {
         DexEntrySyncPacket(entries.values).sendToPlayer(player)
-        DexEvolutionDisplaySyncPacket(evolutionDisplays).sendToPlayer(player)
     }
-
-    fun computeEvolutionDisplays() {
-        evolutionDisplays.clear()
-        PokemonSpecies.species.forEach {
-            try {
-                evolutionDisplays.addAll(buildDisplays(it.standardForm) + it.forms.flatMap { form -> buildDisplays(form) })
-            } catch (e: Exception) {
-                Cobblemon.LOGGER.error("Failed to build dex evolution displays for ${it.resourceIdentifier}", e)
-            }
-        }
-    }
-
-    fun buildDisplays(form: FormData): List<DexEvolutionDisplay> {
-        val result = mutableListOf<DexEvolutionDisplay>()
-        (form.ownEvolutions ?: form.evolutions).forEach { evolution ->
-            val requirements = mutableListOf<DexEvolutionRequirementDisplay>()
-            getToolTipHeaderIcon(evolution)?.let { header ->
-                requirements.add(header)
-            }
-            evolution.requirements.mapNotNull { resolveRequirementData(it) }.forEach { requirement ->
-                requirements.add(requirement)
-            }
-
-            listOfNotNull(evolution.result, evolution.shedder).forEach resultLoop@{ resultProperties ->
-                val resultSpecies = resultProperties.species
-                    ?.let { PokemonSpecies.getByIdentifier(it.asIdentifierDefaultingNamespace()) }
-                    ?: return@resultLoop
-
-                // The result's own aspects win, otherwise carry the source form's aspects over
-                // like a real evolution does (Alola-Bias Pichu -> Alola-Bias Pikachu)
-                val resultForm = resultSpecies.getForm(resultProperties.aspects).takeIf { it != resultSpecies.standardForm }
-                    ?: resultSpecies.getForm(form.aspects.toSet() + resultProperties.aspects)
-                val toAspects = resultProperties.aspects + resultForm.aspects
-                val resultRequirements = if (resultProperties === evolution.shedder) {
-                    requirements + CobblemonDexEvolutionRequirementDisplay(CobblemonItems.POKE_BALL, lang("ui.pokedex.evolution.shedder.tooltip"))
-                } else {
-                    requirements
-                }
-
-                result.add(DexEvolutionDisplay(
-                    fromSpecies = form.species.resourceIdentifier,
-                    fromForm = form.name,
-                    fromAspects = form.aspects.toSet(),
-                    toSpecies = resultSpecies.resourceIdentifier,
-                    toForm = resultForm.name,
-                    toAspects = toAspects,
-                    requirements = resultRequirements,
-                ))
-            }
-        }
-        return result
-    }
-}
+}

common/src/main/kotlin/com/cobblemon/mod/common/api/pokedex/entry/DexEvolutionDisplay.kt

@@ -1,466 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.pokedex.entry
-
-import com.cobblemon.mod.common.CobblemonItems
-import com.cobblemon.mod.common.api.conditional.RegistryLikeCondition
-import com.cobblemon.mod.common.api.conditional.RegistryLikeIdentifierCondition
-import com.cobblemon.mod.common.api.conditional.RegistryLikeTagCondition
-import com.cobblemon.mod.common.api.pokemon.PokemonSpecies
-import com.cobblemon.mod.common.api.pokemon.evolution.Evolution
-import com.cobblemon.mod.common.api.pokemon.feature.IntSpeciesFeatureProvider
-import com.cobblemon.mod.common.api.pokemon.feature.SpeciesFeatures
-import com.cobblemon.mod.common.api.pokemon.requirement.Requirement
-import com.cobblemon.mod.common.api.pokemon.stats.Stats
-import com.cobblemon.mod.common.api.text.add
-import com.cobblemon.mod.common.api.text.green
-import com.cobblemon.mod.common.api.types.ElementalTypes
-import com.cobblemon.mod.common.pokemon.evolution.variants.ItemInteractionEvolution
-import com.cobblemon.mod.common.pokemon.evolution.variants.TradeEvolution
-import com.cobblemon.mod.common.pokemon.requirements.*
-import com.cobblemon.mod.common.util.adapters.RegistryAccessResolver
-import com.cobblemon.mod.common.util.asIdentifierDefaultingNamespace
-import com.cobblemon.mod.common.util.asTranslated
-import com.cobblemon.mod.common.util.lang
-import net.minecraft.core.registries.BuiltInRegistries
-import net.minecraft.core.registries.Registries
-import net.minecraft.network.chat.Component
-import net.minecraft.network.chat.MutableComponent
-import net.minecraft.resources.ResourceLocation
-import net.minecraft.util.ExtraCodecs
-import net.minecraft.world.item.Item
-import net.minecraft.world.item.Items
-import net.minecraft.world.level.biome.Biome
-import net.minecraft.world.level.levelgen.structure.Structure
-import kotlin.jvm.optionals.getOrNull
-
-data class DexEvolutionDisplay(
-    val fromSpecies: ResourceLocation,
-    val fromForm: String,
-    val fromAspects: Set<String>,
-    val toSpecies: ResourceLocation,
-    val toForm: String,
-    val toAspects: Set<String>,
-    val requirements: List<DexEvolutionRequirementDisplay>,
-)
-
-interface DexEvolutionRequirementDisplay {
-    val icon: Item
-    val tooltip: MutableComponent
-}
-
-data class CobblemonDexEvolutionRequirementDisplay(
-    override val icon: Item,
-    override val tooltip: MutableComponent,
-) : DexEvolutionRequirementDisplay
-
-data class CobblemonBiomeDexEvolutionRequirementDisplay(
-    override val icon: Item,
-    override val tooltip: MutableComponent,
-    val condition: ExtraCodecs.TagOrElementLocation? = null,
-    val antiCondition: ExtraCodecs.TagOrElementLocation? = null,
-) : DexEvolutionRequirementDisplay
-
-fun getToolTipHeaderIcon(evolution: Evolution): DexEvolutionRequirementDisplay? {
-    when (evolution) {
-        is ItemInteractionEvolution -> return getToolTipHeaderIcon(evolution)
-        is TradeEvolution -> return getToolTipHeaderIcon(evolution)
-    }
-
-    return null
-}
-
-
-fun getToolTipHeaderIcon(itemInteractionEvolution: ItemInteractionEvolution): CobblemonDexEvolutionRequirementDisplay? {
-    val item = itemInteractionEvolution.requiredContext.items.orElse(null)?.firstOrNull()?.value() ?: return null
-    return CobblemonDexEvolutionRequirementDisplay(item, lang("ui.pokedex.evolution.item_interact.tooltip", item.description.plainCopy().green()))
-}
-
-fun getToolTipHeaderIcon(tradeEvolution: TradeEvolution): CobblemonDexEvolutionRequirementDisplay {
-    val species = tradeEvolution.requiredContext.species
-    val tooltip = if (species == null) {
-        lang("ui.pokedex.evolution.trade.tooltip.with_any_species")
-    } else {
-        PokemonSpecies.getByIdentifier(species.asIdentifierDefaultingNamespace())
-            ?.let { lang("ui.pokedex.evolution.trade.tooltip.with_species", it.translatedName.plainCopy().green()) }
-            ?: lang("ui.pokedex.evolution.trade.tooltip.with_any_species")
-    }
-    return CobblemonDexEvolutionRequirementDisplay(CobblemonItems.LINK_CABLE, tooltip)
-}
-
-fun resolveRequirementData(requirement: Requirement): DexEvolutionRequirementDisplay? {
-    val icon = requirement.pokedexIcon?.let {
-        RegistryAccessResolver.getAccess().registryOrThrow(Registries.ITEM).get(it)
-    }
-
-    val tooltip = requirement.pokedexTooltip?.let {
-        Component.translatable(it)
-    }
-
-    if (icon != null && tooltip != null) {
-        return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-    }
-
-    return buildRequirementData(requirement)
-}
-
-fun buildRequirementData(requirement: Requirement): DexEvolutionRequirementDisplay? {
-    when (requirement) {
-        is AdvancementRequirement -> return buildAdvancementRequirement(requirement)
-        is BattleCriticalHitsRequirement -> return buildBattleCriticalHitsRequirement(requirement)
-        is BiomeRequirement -> return buildBiomeRequirement(requirement)
-        is BlocksTraveledRequirement -> return buildBlocksTraveledRequirement(requirement)
-        is DamageTakenRequirement -> return buildDamageTakenRequirement(requirement)
-        is DefeatRequirement -> return buildDefeatRequirement(requirement)
-        is FriendshipRequirement -> return buildFriendshipRequirement(requirement)
-        is HeldItemRequirement -> return buildHeldItemRequirement(requirement)
-        is LevelRequirement -> return buildLevelRequirement(requirement)
-        is MoonPhaseRequirement -> return buildMoonPhaseRequirement(requirement)
-        is MoveSetRequirement -> return buildMoveSetRequirement(requirement)
-        is MoveTypeRequirement -> return buildMoveTypeRequirement(requirement)
-        is NegateRequirement -> return buildNegateRequirement(requirement)
-        is OwnerHoldsItemRequirement -> return buildOwnerHoldsItemRequirement(requirement)
-        is PartyMemberRequirement -> return buildPartyMemberRequirement(requirement)
-        is PokemonPropertiesRequirement -> return buildPokemonPropertiesRequirement(requirement)
-        is PropertyRangeRequirement -> return buildPropertyRangeRequirement(requirement)
-        is RecoilRequirement -> return buildRecoilRequirement(requirement)
-        is StatCompareRequirement -> return buildStatCompareRequirement(requirement)
-        is StatEqualRequirement -> return buildStatEqualRequirement(requirement)
-        is StructureRequirement -> return buildStructureRequirement(requirement)
-        is TimeRangeRequirement -> return buildTimeRangeRequirement(requirement)
-        is UseMoveRequirement -> return buildUseMoveRequirement(requirement)
-        is WeatherRequirement -> return buildWeatherRequirement(requirement)
-    }
-
-    return null
-}
-
-fun buildAdvancementRequirement(advancementRequirement: AdvancementRequirement): DexEvolutionRequirementDisplay {
-    val icon = Items.BOOK
-    val identifier = advancementRequirement.requiredAdvancement
-    val advancementLanguageKey = "${identifier.namespace}.${identifier.path.substringAfterLast('/')}"
-    val advancementComponent = Component.translatable("advancements.$advancementLanguageKey").green()
-    val tooltip = lang("ui.pokedex.requirement.advancement.tooltip", advancementComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildBattleCriticalHitsRequirement(battleCriticalHitsRequirement: BattleCriticalHitsRequirement): DexEvolutionRequirementDisplay {
-    val icon = CobblemonItems.MEDICINAL_LEEK
-    val criticalsComponent = Component.literal(battleCriticalHitsRequirement.amount.toString()).green()
-    val tooltip = lang("ui.pokedex.requirement.battle_critical_hits.tooltip", criticalsComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-private fun tagDisplayName(registry: String, id: ResourceLocation): MutableComponent {
-    return Component.translatableWithFallback("tag.$registry.${id.namespace}.${id.path.replace('/', '.')}", prettifyPath(id.path))
-}
-
-private fun prettifyPath(path: String): String {
-    return path.substringAfterLast('/').removePrefix("is_").split('_').joinToString(" ") { part -> part.replaceFirstChar(Char::titlecase) }
-}
-
-fun buildNegateRequirement(negateRequirement: NegateRequirement): DexEvolutionRequirementDisplay? {
-    val inner = negateRequirement.inner
-    when (inner) {
-        is BiomeRequirement -> buildBiomeRequirement(inner, negated = true)?.let { return it }
-        is StructureRequirement -> buildStructureRequirement(inner, negated = true)?.let { return it }
-    }
-    val innerDisplay = resolveRequirementData(inner) ?: return null
-    return CobblemonDexEvolutionRequirementDisplay(innerDisplay.icon, lang("ui.pokedex.requirement.negate.tooltip", innerDisplay.tooltip))
-}
-
-fun buildBiomeRequirement(biomeRequirement: BiomeRequirement, negated: Boolean = false): DexEvolutionRequirementDisplay? {
-    // Negating "in X" is "not in X"; negating both a condition and an anticondition isn't expressible as one line
-    if (negated && biomeRequirement.biomeCondition != null && biomeRequirement.biomeAnticondition != null) return null
-    val condition = if (negated) biomeRequirement.biomeAnticondition else biomeRequirement.biomeCondition
-    val antiCondition = if (negated) biomeRequirement.biomeCondition else biomeRequirement.biomeAnticondition
-    if (condition == null && antiCondition == null) {
-        return null
-    }
-
-    val icon = Items.COMPASS
-    val displayName: (RegistryLikeCondition<Biome>) -> MutableComponent = {
-        when (it) {
-            is RegistryLikeTagCondition -> tagDisplayName("worldgen.biome", it.tag.location())
-            is RegistryLikeIdentifierCondition -> Component.translatable("biome.${it.identifier.namespace}.${it.identifier.path}")
-            else -> Component.literal(it.toString())
-        }
-    }
-
-    val tooltip = if (condition != null && antiCondition != null) {
-        lang("ui.pokedex.requirement.biome.both.tooltip", displayName(condition).green(), displayName(antiCondition).green())
-    } else if (condition != null) {
-        lang("ui.pokedex.requirement.biome.tooltip", displayName(condition).green())
-    } else {
-        lang("ui.pokedex.requirement.biome.anticondition.tooltip", displayName(antiCondition!!).green())
-    }
-
-    var conditionConverted: ExtraCodecs.TagOrElementLocation? = null
-    if (condition != null) {
-        val conditionIdentifier = if (condition is RegistryLikeIdentifierCondition) condition.identifier else (condition as RegistryLikeTagCondition).tag.location
-        conditionConverted = ExtraCodecs.TagOrElementLocation(conditionIdentifier, condition is RegistryLikeTagCondition)
-    }
-
-    var antiConditionConverted: ExtraCodecs.TagOrElementLocation? = null
-    if (antiCondition != null) {
-        val conditionIdentifier = if (antiCondition is RegistryLikeIdentifierCondition) antiCondition.identifier else (antiCondition as RegistryLikeTagCondition).tag.location
-        antiConditionConverted = ExtraCodecs.TagOrElementLocation(conditionIdentifier, antiCondition is RegistryLikeTagCondition)
-    }
-
-    return CobblemonBiomeDexEvolutionRequirementDisplay(icon, tooltip, conditionConverted, antiConditionConverted)
-}
-
-fun buildBlocksTraveledRequirement(blocksTraveledRequirement: BlocksTraveledRequirement): DexEvolutionRequirementDisplay {
-    val icon = Items.LEATHER_BOOTS
-    val blocksComponent = Component.literal(blocksTraveledRequirement.amount.toString()).green()
-    val tooltip = lang("ui.pokedex.requirement.blocks_traveled.tooltip", blocksComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildDamageTakenRequirement(damageTakenRequirement: DamageTakenRequirement): DexEvolutionRequirementDisplay {
-    val icon = CobblemonItems.PUNCHING_GLOVE
-    val blocksComponent = Component.literal(damageTakenRequirement.amount.toString()).green()
-    val tooltip = lang("ui.pokedex.requirement.damage_taken.tooltip", blocksComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildDefeatRequirement(defeatRequirement: DefeatRequirement): DexEvolutionRequirementDisplay? {
-    val description = describePokemonProperties(defeatRequirement.target) ?: return null
-    val icon = CobblemonItems.PUNCHING_GLOVE
-    val defeatedAmount = defeatRequirement.amount
-
-    val descriptionComponent = Component.literal(defeatedAmount.toString()).green().add(" ").add(description)
-    val tooltip = lang("ui.pokedex.requirement.defeat.tooltip", descriptionComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildFriendshipRequirement(friendshipRequirement: FriendshipRequirement): DexEvolutionRequirementDisplay {
-    val icon = CobblemonItems.SOOTHE_BELL
-    val friendshipAmountComponent = Component.literal(friendshipRequirement.amount.toString()).green()
-    val tooltip = lang("ui.pokedex.requirement.friendship.tooltip", friendshipAmountComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildHeldItemRequirement(heldItemRequirement: HeldItemRequirement): DexEvolutionRequirementDisplay? {
-    val items = heldItemRequirement.itemCondition.items.getOrNull() ?: return null
-    val item = items.firstOrNull()?.value() ?: return null
-    val itemComponent = items.unwrapKey().map { tag ->
-        val id = tag.location()
-        val fallback = id.path.substringAfterLast('/').split('_').joinToString(" ") { part -> part.replaceFirstChar(Char::titlecase) }
-        Component.translatableWithFallback("tag.item.${id.namespace}.${id.path.replace('/', '.')}", fallback)
-    }.orElseGet { item.description.plainCopy() }
-    val tooltip = lang("ui.pokedex.requirement.held_item.tooltip", itemComponent.green())
-
-    return CobblemonDexEvolutionRequirementDisplay(item, tooltip)
-}
-
-fun buildLevelRequirement(levelRequirement: LevelRequirement): DexEvolutionRequirementDisplay {
-    val minLevel = levelRequirement.minLevel
-    val maxLevel = levelRequirement.maxLevel
-
-    val icon = CobblemonItems.RARE_CANDY
-    val tooltip =
-        if (minLevel == maxLevel || maxLevel == Int.MAX_VALUE)
-            lang("ui.pokedex.requirement.level.tooltip.min", Component.literal(minLevel.toString()).green())
-        else
-            lang("ui.pokedex.requirement.level.tooltip.between", Component.literal(minLevel.toString()).green(), Component.literal(maxLevel.toString()).green())
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildMoonPhaseRequirement(moonPhaseRequirement: MoonPhaseRequirement): DexEvolutionRequirementDisplay {
-    val icon = Items.CLOCK
-    val moonPhaseComponent = moonPhaseRequirement.moonPhase.displayName().plainCopy().green()
-    val tooltip = lang("ui.pokedex.requirement.moon_phase.tooltip", moonPhaseComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildMoveSetRequirement(moveSetRequirement: MoveSetRequirement): DexEvolutionRequirementDisplay {
-    val icon = CobblemonItems.TECHNICAL_MACHINE
-    val tooltip = lang("ui.pokedex.requirement.has_move.tooltip", moveSetRequirement.move.displayName.plainCopy().green())
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildMoveTypeRequirement(moveTypeRequirement: MoveTypeRequirement): DexEvolutionRequirementDisplay {
-    val type = ElementalTypes.get(moveTypeRequirement.type.name)
-    val icon = when (type) {
-        ElementalTypes.NORMAL -> CobblemonItems.NORMAL_GEM
-        ElementalTypes.FIRE -> CobblemonItems.FIRE_GEM
-        ElementalTypes.WATER -> CobblemonItems.WATER_GEM
-        ElementalTypes.GRASS -> CobblemonItems.GRASS_GEM
-        ElementalTypes.ELECTRIC -> CobblemonItems.ELECTRIC_GEM
-        ElementalTypes.ICE -> CobblemonItems.ICE_GEM
-        ElementalTypes.FIGHTING -> CobblemonItems.FIGHTING_GEM
-        ElementalTypes.POISON -> CobblemonItems.POISON_GEM
-        ElementalTypes.GROUND -> CobblemonItems.GROUND_GEM
-        ElementalTypes.FLYING -> CobblemonItems.FLYING_GEM
-        ElementalTypes.PSYCHIC -> CobblemonItems.PSYCHIC_GEM
-        ElementalTypes.BUG -> CobblemonItems.BUG_GEM
-        ElementalTypes.ROCK -> CobblemonItems.ROCK_GEM
-        ElementalTypes.GHOST -> CobblemonItems.GHOST_GEM
-        ElementalTypes.DRAGON -> CobblemonItems.DRAGON_GEM
-        ElementalTypes.DARK -> CobblemonItems.DARK_GEM
-        ElementalTypes.STEEL -> CobblemonItems.STEEL_GEM
-        ElementalTypes.FAIRY -> CobblemonItems.FAIRY_GEM
-        else -> CobblemonItems.NORMAL_GEM
-    }
-
-    val tooltip = lang("ui.pokedex.requirement.has_move_type.tooltip", moveTypeRequirement.type.displayName.plainCopy().green())
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildOwnerHoldsItemRequirement(ownerHoldsItemRequirement: OwnerHoldsItemRequirement): DexEvolutionRequirementDisplay? {
-    val item = ownerHoldsItemRequirement.itemCondition.items.orElse(null)?.firstOrNull()?.value() ?: return null
-    val tooltip = lang("ui.pokedex.requirement.owner_held_item.tooltip", item.description.plainCopy().green())
-
-    return CobblemonDexEvolutionRequirementDisplay(item, tooltip)
-}
-
-fun buildPartyMemberRequirement(partyMemberRequirement: PartyMemberRequirement): DexEvolutionRequirementDisplay? {
-    val description = describePokemonProperties(partyMemberRequirement.target) ?: return null
-    val icon = CobblemonItems.POKE_BALL
-    val tooltip = if (partyMemberRequirement.contains) {
-        lang("ui.pokedex.requirement.party_member.tooltip", description)
-    } else {
-        lang("ui.pokedex.requirement.party_member.anticondition.tooltip", description)
-    }
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildPokemonPropertiesRequirement(pokemonPropertiesRequirement: PokemonPropertiesRequirement): DexEvolutionRequirementDisplay? {
-    val description = describePokemonProperties(pokemonPropertiesRequirement.target) ?: return null
-    val icon = Items.NAME_TAG
-    val tooltip = lang("ui.pokedex.requirement.pokemon_properties.tooltip", description)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildPropertyRangeRequirement(propertyRangeRequirement: PropertyRangeRequirement): DexEvolutionRequirementDisplay? {
-    val provider = SpeciesFeatures.getFeature(propertyRangeRequirement.feature) as? IntSpeciesFeatureProvider ?: return null
-    val displayName = provider.display?.name?.takeIf { it.isNotBlank() }?.asTranslated()?.green() ?: return null
-    val icon = provider.itemPoints.keys.firstOrNull()?.let { BuiltInRegistries.ITEM.get(it) } ?: Items.NAME_TAG
-
-    val range = propertyRangeRequirement.range
-    val tooltip = lang(
-        "ui.pokedex.requirement.property_range.tooltip",
-        displayName,
-        Component.literal(range.first.toString()).green(),
-        Component.literal(range.last.toString()).green()
-    )
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildRecoilRequirement(recoilRequirement: RecoilRequirement): DexEvolutionRequirementDisplay {
-    val icon = CobblemonItems.LIFE_ORB
-    val recoilComponent = Component.literal(recoilRequirement.amount.toString()).green()
-    val tooltip = lang("ui.pokedex.requirement.recoil.tooltip", recoilComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildStatCompareRequirement(statCompareRequirement: StatCompareRequirement): DexEvolutionRequirementDisplay {
-    val highStat = Stats.getStat(statCompareRequirement.highStat)
-    val lowStat = Stats.getStat(statCompareRequirement.lowStat)
-
-    val icon = when (highStat) {
-        Stats.HP, Stats.EVASION, Stats.ACCURACY -> CobblemonItems.HEALTH_MOCHI
-        Stats.ATTACK -> CobblemonItems.MUSCLE_MOCHI
-        Stats.DEFENCE -> CobblemonItems.RESIST_MOCHI
-        Stats.SPECIAL_ATTACK -> CobblemonItems.GENIUS_MOCHI
-        Stats.SPECIAL_DEFENCE -> CobblemonItems.CLEVER_MOCHI
-        Stats.SPEED -> CobblemonItems.SWIFT_MOCHI
-    }
-
-    val highStatComponent = highStat.displayName.plainCopy().green()
-    val lowStatComponent = lowStat.displayName.plainCopy().green()
-    val tooltip = lang("ui.pokedex.requirement.stat_compare.tooltip", highStatComponent, lowStatComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildStatEqualRequirement(statEqualRequirement: StatEqualRequirement): DexEvolutionRequirementDisplay {
-    val statOne = Stats.getStat(statEqualRequirement.statOne)
-    val statTwo = Stats.getStat(statEqualRequirement.statTwo)
-
-    val statOneComponent = statOne.displayName.plainCopy().green()
-    val statTwoComponent = statTwo.displayName.plainCopy().green()
-
-    val icon = CobblemonItems.FRESH_START_MOCHI
-    val tooltip = lang("ui.pokedex.requirement.stat_equal.tooltip", statOneComponent, statTwoComponent)
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildStructureRequirement(structureRequirement: StructureRequirement, negated: Boolean = false): DexEvolutionRequirementDisplay? {
-    if (negated && structureRequirement.structureCondition != null && structureRequirement.structureAnticondition != null) return null
-    val condition = if (negated) structureRequirement.structureAnticondition else structureRequirement.structureCondition
-    val anticondition = if (negated) structureRequirement.structureCondition else structureRequirement.structureAnticondition
-    if (condition == null && anticondition == null) {
-        return null
-    }
-
-    val icon = Items.FILLED_MAP
-    val displayName: (RegistryLikeCondition<Structure>) -> MutableComponent = {
-        when (it) {
-            is RegistryLikeTagCondition -> tagDisplayName("worldgen.structure", it.tag.location())
-            is RegistryLikeIdentifierCondition -> Component.literal(prettifyPath(it.identifier.path))
-            else -> Component.literal(it.toString())
-        }
-    }
-    val tooltip = if (condition != null && anticondition != null) {
-        lang("ui.pokedex.requirement.structure.both.tooltip", displayName(condition).green(), displayName(anticondition).green())
-    } else if (condition != null) {
-        lang("ui.pokedex.requirement.structure.tooltip", displayName(condition).green())
-    } else {
-        lang("ui.pokedex.requirement.structure.anticondition.tooltip", displayName(anticondition!!).green())
-    }
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildTimeRangeRequirement(timeRangeRequirement: TimeRangeRequirement): DexEvolutionRequirementDisplay? {
-    val icon = Items.CLOCK
-    val timeRangeComponent = timeRangeRequirement.range.displayName()?.plainCopy() ?: return null
-    val tooltip = lang("ui.pokedex.requirement.time_range.tooltip", timeRangeComponent.green())
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildUseMoveRequirement(useMoveRequirement: UseMoveRequirement): DexEvolutionRequirementDisplay {
-    val icon = CobblemonItems.CHOICE_BAND
-    val tooltip = lang("ui.pokedex.requirement.use_move.tooltip", useMoveRequirement.move.displayName.plainCopy().green())
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}
-
-fun buildWeatherRequirement(weatherRequirement: WeatherRequirement): DexEvolutionRequirementDisplay {
-    val icon: Item
-    val tooltip: MutableComponent
-
-    if (weatherRequirement.isThundering == true) {
-        icon = Items.LIGHTNING_ROD
-        tooltip = lang("ui.pokedex.requirement.weather.tooltip.thundering")
-    } else {
-        icon = Items.WATER_BUCKET
-        tooltip = lang("ui.pokedex.requirement.weather.tooltip.raining")
-    }
-
-    return CobblemonDexEvolutionRequirementDisplay(icon, tooltip)
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/pokedex/entry/EvolutionPokemonDescriptor.kt

@@ -1,142 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.pokedex.entry
-
-import com.cobblemon.mod.common.api.pokemon.Natures
-import com.cobblemon.mod.common.api.pokemon.PokemonProperties
-import com.cobblemon.mod.common.api.pokemon.PokemonSpecies
-import com.cobblemon.mod.common.api.pokemon.feature.IntSpeciesFeature
-import com.cobblemon.mod.common.api.pokemon.feature.IntSpeciesFeatureProvider
-import com.cobblemon.mod.common.api.pokemon.feature.SpeciesFeatures
-import com.cobblemon.mod.common.api.pokemon.feature.StringSpeciesFeature
-import com.cobblemon.mod.common.api.properties.CustomPokemonProperty
-import com.cobblemon.mod.common.api.text.add
-import com.cobblemon.mod.common.api.text.green
-import com.cobblemon.mod.common.api.types.ElementalTypes
-import com.cobblemon.mod.common.util.asIdentifierDefaultingNamespace
-import com.cobblemon.mod.common.util.asTranslated
-import com.cobblemon.mod.common.util.lang
-import net.minecraft.core.registries.BuiltInRegistries
-import net.minecraft.locale.Language
-import net.minecraft.network.chat.Component
-import net.minecraft.network.chat.MutableComponent
-import net.minecraft.world.item.Items
-
-fun describePokemonProperties(properties: PokemonProperties): MutableComponent? {
-    if (hasUndescribedProperty(properties)) {
-        return null
-    }
-
-    val descriptors = mutableListOf<MutableComponent>()
-
-    properties.species?.let { PokemonSpecies.getByIdentifier(it.asIdentifierDefaultingNamespace()) }?.let {
-        descriptors.add(it.translatedName.plainCopy().green())
-    }
-    properties.gender?.let {
-        descriptors.add(lang("gender.${it.name.lowercase()}").green())
-    }
-    properties.nickname?.let {
-        descriptors.add(lang("ui.pokedex.requirement.properties.nickname", it.plainCopy().green()))
-    }
-    properties.type?.let {
-        val typeName = ElementalTypes.get(it)?.displayName?.plainCopy() ?: Component.literal(it)
-        descriptors.add(lang("ui.pokedex.requirement.properties.type", typeName.green()))
-    }
-    properties.nature?.let {
-        val natureName = Natures.getNature(it.asIdentifierDefaultingNamespace())?.displayName?.asTranslated() ?: Component.literal(it)
-        descriptors.add(lang("ui.pokedex.requirement.properties.nature", natureName.green()))
-    }
-    properties.customProperties.forEach { customProperty ->
-        describeCustomProperty(customProperty)?.let { descriptors.add(it) }
-    }
-
-    val heldItemDescriptor = properties.heldItem?.let { heldItem ->
-        val itemId = heldItem.substringBefore('[').trim().asIdentifierDefaultingNamespace()
-        val item = BuiltInRegistries.ITEM.get(itemId)
-        if (item == Items.AIR) null else lang("ui.pokedex.requirement.properties.held_item", item.description.plainCopy().green())
-    }
-
-    if (descriptors.isEmpty() && heldItemDescriptor == null) {
-        return null
-    }
-
-    val mainDescriptor = when {
-        descriptors.isEmpty() -> null
-        descriptors.size == 1 -> descriptors[0]
-        else -> {
-            val allButLast = descriptors.dropLast(1).reduce { acc, next -> acc.add(", ").add(next) }
-            lang("ui.pokedex.requirement.properties.and", allButLast, descriptors.last())
-        }
-    }
-
-    return when {
-        mainDescriptor != null && heldItemDescriptor != null -> mainDescriptor.add(" ").add(heldItemDescriptor)
-        mainDescriptor != null -> mainDescriptor
-        else -> heldItemDescriptor
-    }
-}
-
-private fun hasUndescribedProperty(properties: PokemonProperties): Boolean {
-    return properties.form != null ||
-            properties.shiny != null ||
-            properties.level != null ||
-            properties.friendship != null ||
-            properties.fullness != null ||
-            properties.pokeball != null ||
-            properties.ability != null ||
-            properties.status != null ||
-            properties.teraType != null ||
-            properties.dmaxLevel != null ||
-            properties.gmaxFactor != null ||
-            properties.tradeable != null ||
-            properties.originalTrainerType != null ||
-            properties.originalTrainer != null ||
-            properties.moves != null ||
-            properties.movesetBuilders != null ||
-            properties.cosmeticItem != null ||
-            properties.scaleModifier != null ||
-            properties.isAlpha != null ||
-            properties.minPerfectIVs != null ||
-            properties.customProperties.any { describeCustomProperty(it) == null }
-}
-
-private fun describeCustomProperty(property: CustomPokemonProperty): MutableComponent? {
-    return when (property) {
-        is IntSpeciesFeature -> describeIntSpeciesFeature(property)
-        is StringSpeciesFeature -> describeStringSpeciesFeature(property)
-        else -> null
-    }
-}
-
-private fun describeIntSpeciesFeature(property: IntSpeciesFeature): MutableComponent? {
-    val value = Component.literal(property.value.toString())
-
-    val overrideKey = "ui.pokedex.requirement.properties.custom.${property.name}"
-    if (Language.getInstance().has("cobblemon.$overrideKey")) {
-        return lang(overrideKey, value.green())
-    }
-
-    val displayName = (SpeciesFeatures.getFeature(property.name) as? IntSpeciesFeatureProvider)
-        ?.display?.name?.takeIf { it.isNotBlank() }
-        ?: return null
-
-    return lang("ui.pokedex.requirement.properties.int_feature", value.green(), displayName.asTranslated().green())
-}
-
-private fun describeStringSpeciesFeature(property: StringSpeciesFeature): MutableComponent? {
-    val key = "ui.pokedex.requirement.properties.custom.${property.name}"
-    if (!Language.getInstance().has("cobblemon.$key")) {
-        return null
-    }
-
-    val value = PokemonSpecies.getByIdentifier(property.value.asIdentifierDefaultingNamespace())?.translatedName?.plainCopy()
-        ?: Component.literal(property.value)
-
-    return lang(key, value.green())
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/pokemon/PokemonSpecies.kt

@@ -26,6 +26,7 @@ import com.cobblemon.mod.common.api.moves.MoveTemplate
 import com.cobblemon.mod.common.api.moves.MovesetBuilder
 import com.cobblemon.mod.common.api.moves.adapters.MoveTemplateAdapter
 import com.cobblemon.mod.common.api.npc.configuration.MoLangConfigVariable
+import com.cobblemon.mod.common.api.pokemon.PokemonSpecies.getByIdentifier
 import com.cobblemon.mod.common.api.pokemon.effect.ShoulderEffect
 import com.cobblemon.mod.common.api.pokemon.effect.adapter.ShoulderEffectAdapter
 import com.cobblemon.mod.common.api.pokemon.egg.EggGroup
@@ -127,7 +128,7 @@ object PokemonSpecies : JsonDataRegistry<Species> {
         .registerTypeAdapter(TypeToken.getParameterized(RegistryLikeCondition::class.java, Fluid::class.java).type, FluidLikeConditionAdapter)
         .registerTypeAdapter(EggGroup::class.java, EggGroupAdapter)
         .registerTypeAdapter(MobEffect::class.java, RegistryElementAdapter<MobEffect>(BuiltInRegistries::MOB_EFFECT))
-        .registerTypeAdapter(ItemPredicate::class.java, LegacyItemConditionWrapperAdapter())
+        .registerTypeAdapter(ItemPredicate::class.java, LegacyItemConditionWrapperAdapter)
         .registerTypeAdapter(RidingBehaviourSettings::class.java, RidingBehaviourSettingsAdapter)
         .registerTypeAdapter(RideSoundSettingsList::class.java, RideSoundSettingsListAdapter)
         .registerTypeAdapter(ObtainableItemCondition::class.java, ObtainableItemConditionAdapter)

common/src/main/kotlin/com/cobblemon/mod/common/api/pokemon/aspect/AspectParticleMap.kt

@@ -15,8 +15,6 @@ import com.cobblemon.mod.common.block.entity.PokeSnackBlockEntity
 import com.cobblemon.mod.common.client.entity.PokemonClientDelegate
 import com.cobblemon.mod.common.client.render.MatrixWrapper
 import com.cobblemon.mod.common.util.cobblemonResource
-import net.minecraft.client.Minecraft
-import net.minecraft.client.ParticleStatus
 import net.minecraft.core.particles.BlockParticleOption
 import net.minecraft.core.particles.ParticleOptions
 import net.minecraft.core.particles.ParticleTypes
@@ -42,25 +40,13 @@ sealed class ParticleData {
         val chance: Double,
         val amount: Int,
         val locatorResolver: (Map<String, MatrixWrapper>) -> List<String>
-    ): ParticleData() {
-        fun amount(): Int = when(Minecraft.getInstance().options.particles().get()) {
-            ParticleStatus.ALL -> amount
-            ParticleStatus.DECREASED -> amount / 2
-            ParticleStatus.MINIMAL -> amount / 4
-        }
-    }
+    ): ParticleData()
 
     data class MinecraftParticle(
         val particle: ParticleOptions,
         val chance: Double,
         val amount: Int
-    ): ParticleData() {
-        fun amount(): Int = when(Minecraft.getInstance().options.particles().get()) {
-            ParticleStatus.ALL -> amount
-            ParticleStatus.DECREASED -> amount / 2
-            ParticleStatus.MINIMAL -> amount / 4
-        }
-    }
+    ): ParticleData()
 }
 
 /**

common/src/main/kotlin/com/cobblemon/mod/common/api/pokemon/requirement/Requirement.kt

@@ -11,8 +11,6 @@ package com.cobblemon.mod.common.api.pokemon.requirement
 import com.cobblemon.mod.common.api.pokemon.evolution.ContextEvolution
 import com.cobblemon.mod.common.api.pokemon.evolution.Evolution
 import com.cobblemon.mod.common.pokemon.Pokemon
-import net.minecraft.resources.ResourceLocation
-import java.util.WeakHashMap
 
 /**
  * Represents a universal requirement suitable for various checks on pokemon..
@@ -34,11 +32,4 @@ fun interface Requirement {
      */
     fun check(pokemon: Pokemon): Boolean
 
-    val pokedexIcon: ResourceLocation? get() = pokedexIconOverrides[this]
-    val pokedexTooltip: String? get() = pokedexTooltipOverrides[this]
-
-    companion object {
-        val pokedexIconOverrides = WeakHashMap<Requirement, ResourceLocation>()
-        val pokedexTooltipOverrides = WeakHashMap<Requirement, String>()
-    }
 }

common/src/main/kotlin/com/cobblemon/mod/common/api/riding/util/BlockPrimitiveCollector.kt

@@ -1,62 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.riding.util
-
-import net.minecraft.core.BlockPos
-import net.minecraft.world.level.BlockGetter
-import net.minecraft.world.phys.AABB
-import kotlin.math.floor
-
-/**
- * Walks every block position inside [searchBox] and turns each solid block into one
- * full-cube [FieldPrimitive].
- *
- * @author Jackson
- * @since July 27th, 2026
- */
-
-fun collectPrimitivesFromBlocks(
-    level: BlockGetter,
-    searchBox: AABB,
-    shape: PrimitiveShape,
-    includeFluids: Boolean = false
-): List<FieldPrimitive> {
-    val primitives = mutableListOf<FieldPrimitive>()
-
-    val minX = floor(searchBox.minX).toInt()
-    val maxX = floor(searchBox.maxX).toInt()
-    val minY = floor(searchBox.minY).toInt()
-    val maxY = floor(searchBox.maxY).toInt()
-    val minZ = floor(searchBox.minZ).toInt()
-    val maxZ = floor(searchBox.maxZ).toInt()
-
-    val pos = BlockPos.MutableBlockPos()
-    for (x in minX..maxX) {
-        for (y in minY..maxY) {
-            for (z in minZ..maxZ) {
-                pos.set(x, y, z)
-                val state = level.getBlockState(pos)
-
-                val isSolid = !state.getCollisionShape(level, pos).isEmpty
-                val isFluid = includeFluids && !state.fluidState.isEmpty
-                if (!isSolid && !isFluid) continue
-
-                primitives.add(
-                    FieldPrimitive(
-                        shape = shape,
-                        centerX = x + 0.5f, centerY = y + 0.5f, centerZ = z + 0.5f,
-                        halfWidth = 0.5f, halfHeight = 0.5f, halfDepth = 0.5f
-                    )
-                )
-            }
-        }
-    }
-
-    return primitives
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/riding/util/DistanceFieldMath.kt

@@ -1,155 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.riding.util
-
-import net.minecraft.world.phys.Vec3
-import kotlin.math.abs
-import kotlin.math.max
-import kotlin.math.min
-import kotlin.math.sqrt
-
-/**
- * Helpful Functions when working with signed distance fields/functions.
- * https://iquilezles.org/articles/distfunctions/
- *
- * @author Jackson
- * @since July 27th, 2026
- */
-
-/** Which distance formula a primitive uses. */
-enum class PrimitiveShape {
-    BOX,
-    ROUNDED_BOX,
-    ELLIPSOID
-}
-
-/** Tunable constants for the field. */
-data class DistanceFieldTuning(
-    val smoothingRange: Float = 0.5f,
-    val roundingRadius: Float = 0.08f
-)
-
-/** A single shape in the field - a center position, half-extents, and which formula to use. */
-data class FieldPrimitive(
-    val shape: PrimitiveShape,
-    val centerX: Float, val centerY: Float, val centerZ: Float,
-    val halfWidth: Float, val halfHeight: Float, val halfDepth: Float
-)
-
-/** Fast approximate 1/sqrt(x) - the Quake III trick, cheaper than a real sqrt + divide. */
-fun fastInverseSqrt(value: Float): Float {
-    var x = value
-    val halfX = 0.5f * x
-    var bits = java.lang.Float.floatToIntBits(x)
-    bits = 0x5f3759df - (bits shr 1)
-    x = java.lang.Float.intBitsToFloat(bits)
-    x *= (1.5f - halfX * x * x)
-    return x
-}
-
-/** Exact distance from a point to an axis-aligned box. Inputs are relative to the box's own center. */
-fun boxDistance(relX: Float, relY: Float, relZ: Float, halfWidth: Float, halfHeight: Float, halfDepth: Float): Float {
-    val qx = abs(relX) - halfWidth
-    val qy = abs(relY) - halfHeight
-    val qz = abs(relZ) - halfDepth
-    val ox = max(qx, 0f)
-    val oy = max(qy, 0f)
-    val oz = max(qz, 0f)
-    val outside = sqrt(ox * ox + oy * oy + oz * oz)
-    val inside = min(max(qx, max(qy, qz)), 0f)
-    return outside + inside
-}
-
-/** Same as boxDistance but with rounded corners/edges https://iquilezles.org/articles/distfunctions/ */
-fun roundedBoxDistance(relX: Float, relY: Float, relZ: Float, halfWidth: Float, halfHeight: Float, halfDepth: Float, roundingRadius: Float): Float =
-    boxDistance(relX, relY, relZ, halfWidth - roundingRadius, halfHeight - roundingRadius, halfDepth - roundingRadius) - roundingRadius
-
-/** Approximate (lower-bound) distance to an ellipsoid https://iquilezles.org/articles/ellipsoids/. */
-fun ellipsoidDistance(relX: Float, relY: Float, relZ: Float, halfWidth: Float, halfHeight: Float, halfDepth: Float): Float {
-    val px = relX / halfWidth
-    val py = relY / halfHeight
-    val pz = relZ / halfDepth
-    val inverseMagnitude = fastInverseSqrt(px * px + py * py + pz * pz)
-    val trueDistance = sqrt(relX * relX + relY * relY + relZ * relZ)
-    return trueDistance * (1.0f - inverseMagnitude)
-}
-
-/** Distance from a point to one primitive, dispatched by its shape. */
-fun distanceToPrimitive(primitive: FieldPrimitive, sampleX: Float, sampleY: Float, sampleZ: Float, tuning: DistanceFieldTuning): Float {
-    val relX = sampleX - primitive.centerX
-    val relY = sampleY - primitive.centerY
-    val relZ = sampleZ - primitive.centerZ
-    return when (primitive.shape) {
-        PrimitiveShape.BOX -> boxDistance(relX, relY, relZ, primitive.halfWidth, primitive.halfHeight, primitive.halfDepth)
-        PrimitiveShape.ROUNDED_BOX -> roundedBoxDistance(relX, relY, relZ, primitive.halfWidth, primitive.halfHeight, primitive.halfDepth, tuning.roundingRadius)
-        PrimitiveShape.ELLIPSOID -> ellipsoidDistance(relX, relY, relZ, primitive.halfWidth, primitive.halfHeight, primitive.halfDepth)
-    }
-}
-
-///** Normalized quadratic smooth-min https://iquilezles.org/articles/smin/ */
-//fun smoothMinimum(a: Float, b: Float, smoothingRange: Float): Float {
-//    if (smoothingRange <= 0.001f) return min(a, b)
-//    val k = smoothingRange * 4.0f
-//    val h = (0.5f + 0.5f * (b - a) / k).coerceIn(0f, 1f)
-//    return b + (a - b) * h - k * h * (1f - h)
-//}
-//
-///** Folds every primitive's distance together into one field value at a point. */
-//fun sampleField(primitives: List<FieldPrimitive>, sampleX: Float, sampleY: Float, sampleZ: Float, tuning: DistanceFieldTuning): Float {
-//    var result = Float.POSITIVE_INFINITY
-//    for (primitive in primitives) {
-//        val distance = distanceToPrimitive(primitive, sampleX, sampleY, sampleZ, tuning)
-//        result = if (result == Float.POSITIVE_INFINITY) distance else smoothMinimum(result, distance, tuning.smoothingRange)
-//    }
-//    return result
-//}
-
-/** Normalized quadratic smooth-min https://iquilezles.org/articles/smin/ */
-fun smoothMinimum(a: Float, b: Float, smoothingRange: Float): Float {
-    if (smoothingRange <= 0.001f) return min(a, b)
-    val k = smoothingRange * 4.0f
-    val h = (0.5f + 0.5f * (b - a) / k).coerceIn(0f, 1f)
-    return b + (a - b) * h - k * h * (1f - h)
-}
-
-/** Folds nearby primitive distances together into one field value at a point. */
-fun sampleField(primitives: List<FieldPrimitive>, sampleX: Float, sampleY: Float, sampleZ: Float, tuning: DistanceFieldTuning): Float {
-    if (primitives.isEmpty()) return Float.POSITIVE_INFINITY
-
-    val distances = FloatArray(primitives.size) { distanceToPrimitive(primitives[it], sampleX, sampleY, sampleZ, tuning) }
-    val minDistance = distances.min()
-
-    if (tuning.smoothingRange <= 0.001f) return minDistance
-
-    // Anything more than a few blend-widths past the closest primitive is cut - its
-    // contribution would be negligible in a correct blend anyway, but left in, it still
-    // drags the chained result down the more of them there are.
-    val cutoff = tuning.smoothingRange * 3f
-
-    var result = Float.POSITIVE_INFINITY
-    for (distance in distances) {
-        if (distance - minDistance > cutoff) continue
-        result = if (result == Float.POSITIVE_INFINITY) distance else smoothMinimum(result, distance, tuning.smoothingRange)
-    }
-    return result
-}
-
-/** Finite-difference gradient of the field at a point - points away from the surface, magnitude ~1 for a clean field. */
-fun estimateGradient(primitives: List<FieldPrimitive>, point: Vec3, tuning: DistanceFieldTuning, epsilon: Float = 0.05f): Vec3 {
-    val px = point.x.toFloat()
-    val py = point.y.toFloat()
-    val pz = point.z.toFloat()
-
-    val dx = sampleField(primitives, px + epsilon, py, pz, tuning) - sampleField(primitives, px - epsilon, py, pz, tuning)
-    val dy = sampleField(primitives, px, py + epsilon, pz, tuning) - sampleField(primitives, px, py - epsilon, pz, tuning)
-    val dz = sampleField(primitives, px, py, pz + epsilon, tuning) - sampleField(primitives, px, py, pz - epsilon, tuning)
-
-    val gradient = Vec3(dx.toDouble(), dy.toDouble(), dz.toDouble())
-    return if (gradient.lengthSqr() > 1e-8) gradient.normalize() else Vec3(0.0, 1.0, 0.0)
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/riding/util/SdfVisualizer.kt

@@ -1,105 +0,0 @@
-/*
- * Copyright (C) 2023 Cobblemon Contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-package com.cobblemon.mod.common.api.riding.util
-
-import net.minecraft.core.particles.DustParticleOptions
-import net.minecraft.server.level.ServerLevel
-import net.minecraft.world.entity.Entity
-import net.minecraft.world.phys.AABB
-import net.minecraft.world.phys.Vec3
-import org.joml.Vector3f
-
-/** One shell to draw - a target field value, a color, a particle size. */
-data class DistanceFieldLayer(
-    val isoValue: Float,
-    val color: Vector3f,
-    val particleSize: Float = 1.0f
-)
-
-/**
- * Marches a grid of vertical columns through the field around [center] and spawns a
- * particle everywhere it crosses one of [layers]' target values. Server-side only.
- */
-fun visualizeDistanceField(
-    referenceEntity: Entity,
-    center: Vec3,
-    layers: List<DistanceFieldLayer>,
-    shape: PrimitiveShape = PrimitiveShape.BOX,
-    horizontalRadius: Double = 4.0,
-    verticalRange: Double = 4.0,
-    sampleSpacing: Double = 0.5,
-    marchStep: Double = 0.1,
-    tuning: DistanceFieldTuning = DistanceFieldTuning()
-) {
-    val level = referenceEntity.level()
-    if (level !is ServerLevel) return
-
-    val searchBox = AABB(
-        center.x - horizontalRadius, center.y - verticalRange, center.z - horizontalRadius,
-        center.x + horizontalRadius, center.y, center.z + horizontalRadius
-    )
-
-    val primitives = collectPrimitivesFromBlocks(level, searchBox, shape, includeFluids = true)
-    if (primitives.isEmpty()) return
-
-    var x = -horizontalRadius
-    while (x <= horizontalRadius) {
-        var z = -horizontalRadius
-        while (z <= horizontalRadius) {
-            marchColumn(level, primitives, center, x, z, verticalRange, marchStep, layers, tuning)
-            z += sampleSpacing
-        }
-        x += sampleSpacing
-    }
-}
-
-private fun marchColumn(
-    level: ServerLevel,
-    primitives: List<FieldPrimitive>,
-    center: Vec3,
-    offsetX: Double,
-    offsetZ: Double,
-    verticalRange: Double,
-    marchStep: Double,
-    layers: List<DistanceFieldLayer>,
-    tuning: DistanceFieldTuning
-) {
-    val previousValue = FloatArray(layers.size) { Float.NaN }
-
-    var y = verticalRange
-    while (y >= -verticalRange) {
-        val worldX = (center.x + offsetX).toFloat()
-        val worldY = (center.y + y).toFloat()
-        val worldZ = (center.z + offsetZ).toFloat()
-        val fieldValue = sampleField(primitives, worldX, worldY, worldZ, tuning)
-
-        for (layerIndex in layers.indices) {
-            val layer = layers[layerIndex]
-            val previous = previousValue[layerIndex]
-
-            if (!previous.isNaN() && crossedTarget(previous, fieldValue, layer.isoValue)) {
-                val t = (layer.isoValue - previous) / (fieldValue - previous)
-                val crossingY = (y + marchStep) - marchStep * t
-                spawnLayerParticle(level, center.add(offsetX, crossingY, offsetZ), layer)
-            }
-
-            previousValue[layerIndex] = fieldValue
-        }
-
-        y -= marchStep
-    }
-}
-
-private fun crossedTarget(previous: Float, current: Float, target: Float): Boolean =
-    (previous - target) * (current - target) < 0f
-
-private fun spawnLayerParticle(level: ServerLevel, pos: Vec3, layer: DistanceFieldLayer) {
-    val particle = DustParticleOptions(layer.color, layer.particleSize)
-    level.sendParticles(particle, pos.x, pos.y, pos.z, 1, 0.0, 0.0, 0.0, 0.0)
-}

common/src/main/kotlin/com/cobblemon/mod/common/api/spawning/TimeRange.kt

@@ -10,8 +10,6 @@ package com.cobblemon.mod.common.api.spawning
 
 import com.cobblemon.mod.common.api.spawning.TimeRange.Companion.timeRanges
 import com.cobblemon.mod.common.api.spawning.condition.SpawningCondition
-import com.cobblemon.mod.common.util.lang
-import net.minecraft.network.chat.MutableComponent
 import com.cobblemon.mod.common.util.adapters.IntRangesAdapter
 
 /**
@@ -51,25 +49,4 @@ class TimeRange : IntRanges {
 
     constructor() : super()
     constructor(vararg ranges: IntRange) : super(*ranges)
-
-    fun displayName(): MutableComponent? {
-        val key = timeRanges.entries.firstOrNull { entry -> this == entry.value }?.key ?: return null
-        return lang("ui.time_range.$key")
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (other !is TimeRange) return false
-
-        if (other.ranges.size != this.ranges.size) return false
-        other.ranges.forEachIndexed { index, otherRange ->
-            if (this.ranges[index] != otherRange) return false
-        }
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        return ranges.hashCode()
-    }
 }

common/src/main/kotlin/com/cobblemon/mod/common/api/spawning/condition/AreaSpawningCondition.kt

@@ -42,8 +42,8 @@ abstract class AreaTypeSpawningCondition<T : AreaSpawnablePosition> : SpawningCo
     override fun copyFrom(other: SpawningCondition<*>, merger: Merger) {
         super.copyFrom(other, merger)
         if (other is AreaTypeSpawningCondition) {
-            minHeight = merger.mergeSingle(minHeight, other.minHeight)
-            maxHeight = merger.mergeSingle(maxHeight, other.maxHeight)
+            merger.mergeSingle(minHeight, other.minHeight)
+            merger.mergeSingle(maxHeight, other.maxHeight)
             neededNearbyBlocks = merger.merge(neededNearbyBlocks, other.neededNearbyBlocks)?.toMutableList()
         }
     }

common/src/main/kotlin/com/cobblemon/mod/common/api/spawning/condition/MoonPhase.kt

@@ -8,8 +8,6 @@
 
 package com.cobblemon.mod.common.api.spawning.condition
 
-import com.cobblemon.mod.common.util.lang
-import net.minecraft.network.chat.MutableComponent
 import net.minecraft.world.level.Level
 
 /**
@@ -44,7 +42,4 @@ enum class MoonPhase {
         fun ofWorld(world: Level): MoonPhase = VALUES[world.moonPhase]
     }
 
-    fun displayName(): MutableComponent {
-        return lang("ui.moon_phase.${this.name.lowercase()}")
-    }
 }

common/src/main/kotlin/com/cobblemon/mod/common/api/spawning/condition/SubmergedSpawningCondition.kt

@@ -46,7 +46,7 @@ abstract class SubmergedTypeSpawningCondition<T : SubmergedSpawnablePosition> :
         super.copyFrom(other, merger)
         if (other is SubmergedTypeSpawningCondition) {
             minDepth = merger.mergeSingle(minDepth, other.minDepth)
-            maxDepth = merger.mergeSingle(maxDepth, other.maxDepth)
+            maxDepth = merger.mergeSingle(minDepth, other.minDepth)
             fluidIsSource = merger.mergeSingle(fluidIsSource, other.fluidIsSource)
             fluid = merger.mergeSingle(fluid, other.fluid)
         }

common/src/main/kotlin/com/cobblemon/mod/common/api/spawning/condition/SurfaceSpawningCondition.kt

@@ -39,7 +39,7 @@ abstract class SurfaceTypeSpawningCondition<T : SurfaceSpawnablePosition> : Area
         super.copyFrom(other, merger)
         if (other is SurfaceTypeSpawningCondition) {
             minDepth = merger.mergeSingle(minDepth, other.minDepth)
-            maxDepth = merger.mergeSingle(maxDepth, other.maxDepth)
+            maxDepth = merger.mergeSingle(minDepth, other.minDepth)
             fluid = merger.mergeSingle(fluid, other.fluid)
         }
     }

common/src/main/kotlin/com/cobblemon/mod/common/api/spawning/influence/SpawnBaitInfluence.kt

@@ -22,7 +22,6 @@ import com.cobblemon.mod.common.api.spawning.position.SpawnablePosition
 import com.cobblemon.mod.common.api.types.ElementalTypes
 import com.cobblemon.mod.common.entity.pokemon.PokemonEntity
 import com.cobblemon.mod.common.entity.pokemon.ai.sensors.AlphaLevelMatchingSensor
-import com.cobblemon.mod.common.util.asIdentifierDefaultingNamespace
 import net.minecraft.server.level.ServerPlayer
 import net.minecraft.world.entity.Entity
 
@@ -77,7 +76,7 @@ open class SpawnBaitInfluence(val effects: List<SpawnBait.Effect>, val onUsed: (
             ?: return super.affectWeight(detail, spawnablePosition, weight)
 
         val detailSpecies = pokemonDetail.pokemon.species
-            ?.let { PokemonSpecies.getByIdentifier(it.asIdentifierDefaultingNamespace()) }
+            ?.let { PokemonSpecies.getByName(it) }
             ?: return super.affectWeight(detail, spawnablePosition, weight)
 
         val formData = detailSpecies.getForm(pokemonDetail.pokemon.aspects)

common/src/main/kotlin/com/cobblemon/mod/common/api/spawning/spawner/Spawner.kt

@@ -27,7 +27,6 @@ import com.cobblemon.mod.common.entity.pokemon.PokemonEntity
 import com.cobblemon.mod.common.util.isBoxLoaded
 import com.cobblemon.mod.common.util.removeIf
 import com.cobblemon.mod.common.util.squeezeWithinBounds
-import com.cobblemon.mod.common.util.toBlockPos
 import com.cobblemon.mod.common.util.toVec3f
 import com.cobblemon.mod.common.util.weightedSelection
 import kotlin.math.max
@@ -191,12 +190,13 @@ interface Spawner {
     }
 
     fun isValidStartPoint(world: Level, chunk: ChunkAccess, startPos: BlockPos.MutableBlockPos): Boolean {
-        val abovePos = startPos.above()
-        if (!world.isLoaded(startPos) || !world.isLoaded(abovePos)) {
+        val y = startPos.y
+        if (!world.isLoaded(startPos) || !world.isLoaded(startPos.setY(y + 1))) {
             return false
         }
-        val mid = chunk.getBlockState(startPos)
-        val above = chunk.getBlockState(abovePos)
+
+        val mid = chunk.getBlockState(startPos.setY(y))
+        val above = chunk.getBlockState(startPos.setY(y + 1))
 
         // Above must be non-solid
         if (!above.isPathfindable(PathComputationType.AIR)) {
@@ -212,49 +212,51 @@ interface Spawner {
     }
 
     fun constrainArea(area: SpawningZoneInput): SpawningZoneInput? {
-        val world = area.world
-        val centerPos = area.getCenter().toBlockPos()
+        val basePos = BlockPos.MutableBlockPos(area.baseX, area.baseY, area.baseZ)
+        val originalY = area.baseY
+
+        val (chunkX, chunkZ) = Pair(SectionPos.blockToSectionCoord(area.baseX), SectionPos.blockToSectionCoord(area.baseZ))
 
-        val (centerChunkX, centerChunkZ) = Pair(SectionPos.blockToSectionCoord(centerPos.x), SectionPos.blockToSectionCoord(centerPos.z))
         // if the chunk isn't loaded, we don't want to go further & we don't want the getChunk function below to load/create the chunk.
-        if (!world.areEntitiesLoaded(ChunkPos.asLong(centerChunkX, centerChunkZ))) return null
+        if (!area.world.areEntitiesLoaded(ChunkPos.asLong(chunkX, chunkZ))) return null
 
-        val chunk = world.getChunk(centerChunkX, centerChunkZ, ChunkStatus.FULL) ?: return null
+        val chunk = area.world.getChunk(chunkX, chunkZ, ChunkStatus.FULL) ?: return null
 
-        val probePos = centerPos.mutable()
-        var validY = if (isValidStartPoint(world, chunk, probePos)) centerPos.y else null
+        var valid = isValidStartPoint(area.world, chunk, basePos)
 
-        if (validY == null) {
-            for (offset in 1..Cobblemon.config.maxVerticalCorrectionBlocks) {
-                if (isValidStartPoint(world, chunk, probePos.set(centerPos.x, centerPos.y + offset, centerPos.z))) {
-                    validY = centerPos.y + offset
+        if (!valid) {
+            var offset = 1
+            do {
+                if (isValidStartPoint(area.world, chunk, basePos.setY(originalY + offset))) {
+                    valid = true
+                    basePos.y = originalY + offset
                     break
-                } else if (isValidStartPoint(world, chunk, probePos.set(centerPos.x, centerPos.y - offset, centerPos.z))) {
-                    validY = centerPos.y - offset
+                } else if (isValidStartPoint(area.world, chunk, basePos.setY(originalY - offset))) {
+                    valid = true
+                    basePos.y = originalY - offset
                     break
                 }
-            }
+                offset++
+            } while (offset <= Cobblemon.config.maxVerticalCorrectionBlocks)
         }
-        val targetY = validY ?: return null
-        val newBaseY = (targetY - (area.height / 2)).coerceIn(world.minBuildHeight, world.maxBuildHeight)
-        val minPos = world.squeezeWithinBounds(BlockPos(area.baseX, newBaseY, area.baseZ))
-        val maxPos = world.squeezeWithinBounds(BlockPos(area.baseX + area.length, newBaseY + area.height, area.baseZ + area.width))
 
-        val finalBox = AABB(
-            minPos.x.toDouble(), minPos.y.toDouble(), minPos.z.toDouble(),
-            maxPos.x.toDouble(), maxPos.y.toDouble(), maxPos.z.toDouble()
-        )
-        if (minPos.x < maxPos.x && minPos.y < maxPos.y && minPos.z < maxPos.z && world.isBoxLoaded(finalBox)) {
-            return SpawningZoneInput(
-                cause = area.cause,
-                world = world,
-                baseX = minPos.x,
-                baseY = minPos.y,
-                baseZ = minPos.z,
-                length = maxPos.x - minPos.x,
-                height = maxPos.y - minPos.y,
-                width = maxPos.z - minPos.z
-            )
+        if (valid) {
+            val min = area.world.squeezeWithinBounds(basePos)
+            val max = area.world.squeezeWithinBounds(basePos.move(area.length, area.height, area.width))
+            if (area.world.isLoaded(min) && area.world.isLoaded(max) &&
+                min.x < max.x && min.y < max.y && min.z < max.z
+            ) {
+                return SpawningZoneInput(
+                    cause = area.cause,
+                    world = area.world,
+                    baseX = min.x,
+                    baseY = min.y,
+                    baseZ = min.z,
+                    length = max.x - min.x,
+                    height = max.y - min.y,
+                    width = max.z - min.z
+                )
+            }
         }
 
         return null

common/src/main/kotlin/com/cobblemon/mod/common/api/storage/pc/PCStore.kt

@@ -29,7 +29,6 @@ import com.cobblemon.mod.common.net.messages.client.storage.pc.InitializePCPacke
 import com.cobblemon.mod.common.net.messages.client.storage.pc.MoveClientPCPokemonPacket
 import com.cobblemon.mod.common.net.messages.client.storage.pc.SetPCPokemonPacket
 import com.cobblemon.mod.common.net.messages.client.storage.pc.wallpaper.UnlockPCBoxWallpaperPacket
-import com.cobblemon.mod.common.net.messages.server.storage.pc.MovePCPokemonBatchPacket
 import com.cobblemon.mod.common.pokemon.Pokemon
 import com.cobblemon.mod.common.util.DataKeys
 import com.cobblemon.mod.common.util.asTranslated
@@ -271,34 +270,6 @@ open class PCStore(
         }
     }
 
-    fun moveBatch(moves: List<Triple<UUID, PCPosition, PCPosition>>): Boolean {
-        if (moves.isEmpty() || moves.size > MovePCPokemonBatchPacket.MAX_MOVES) return false
-        if (moves.map { it.second }.toSet().size != moves.size ||
-            moves.map { it.third }.toSet().size != moves.size ||
-            moves.map { it.first }.toSet().size != moves.size
-        ) return false
-        if (moves.any { (_, source, target) -> !isValidPosition(source) || !isValidPosition(target) }) return false
-
-        val sourcePositions = moves.mapTo(mutableSetOf()) { it.second }
-        val pokemonMoves = moves.map { (pokemonID, source, target) ->
-            val pokemon = get(source)?.takeIf { it.uuid == pokemonID } ?: return false
-            Triple(source, target, pokemon)
-        }
-        if (pokemonMoves.any { (_, target, _) -> get(target) != null && target !in sourcePositions }) return false
-
-        pokemonMoves.forEach { (source, _, _) -> setAtPosition(source, null) }
-        pokemonMoves.forEach { (_, target, pokemon) -> setAtPosition(target, pokemon) }
-
-        pokemonMoves.forEach { (_, _, pokemon) ->
-            sendPacketToObservers(RemoveClientPokemonPacket(this, pokemon.uuid))
-        }
-        pokemonMoves.forEach { (_, target, pokemon) ->
-            sendPacketToObservers(SetPCPokemonPacket(uuid, target) { pokemon })
-        }
-        pcChangeObservable.emit(Unit)
-        return true
-    }
-
     override fun loadPositionFromNBT(nbt: CompoundTag): StoreCoordinates<PCPosition> {
         return StoreCoordinates(this, PCPosition(nbt.getShort(DataKeys.STORE_BOX).toInt(), nbt.getByte(DataKeys.STORE_SLOT).toInt()))
     }

common/src/main/kotlin/com/cobblemon/mod/common/api/tags/CobblemonItemTags.kt

@@ -120,7 +120,7 @@ object CobblemonItemTags {
     @JvmField val DESTINY_KNOT = create("held/destiny_knot")
     @JvmField val EVERSTONE = create("held/everstone")
     @JvmField val EXPERIENCE_SHARE = create("held/experience_share")
-    @JvmField val IS_FRIENDSHIP_BOOSTER = create("held/is_friendship_booster")
+    @JvmField val IS_FRIENDSHIP_BOOSTER = create("is_friendship_booster")
     @JvmField val ANY_HELD_ITEM = create("held/is_held_item")
     @JvmField val BLACKLISTED_ITEMS_TO_HOLD = create("held/blacklisted_items_to_hold")
     @JvmField val WHITELISTED_ITEMS_TO_HOLD = create("held/whitelisted_items_to_hold")

common/src/main/kotlin/com/cobblemon/mod/common/api/types/ElementalType.kt

@@ -34,7 +34,6 @@ class ElementalType(
     val resourceLocation: ResourceLocation = ResourceLocation.fromNamespaceAndPath(Cobblemon.MODID, "ui/types.png"),
     val showdownId: String = ShowdownIdentifiable.REGEX.replace(name.lowercase(), ""),
     val typeGem: ResourceLocation = ResourceLocation.fromNamespaceAndPath(Cobblemon.MODID, showdownId + "_gem"),
-    val order: Int = 1000
     ) : ShowdownIdentifiable {
 
     override fun showdownId(): String {

common/src/main/kotlin/com/cobblemon/mod/common/api/types/ElementalTypes.kt

@@ -25,8 +25,7 @@ object ElementalTypes {
         hue = 0xE8E8DA,
         textureXMultiplier = 0,
         primaryColor = 0x8FA689,
-        secondaryColor = 0xFFFBE2,
-        order = 0
+        secondaryColor = 0xFFFBE2
     )
 
     @JvmField
@@ -36,8 +35,7 @@ object ElementalTypes {
         hue = 0xFF6E21,
         textureXMultiplier = 1,
         primaryColor = 0xF92D2D,
-        secondaryColor = 0xF99B1D,
-        order = 1
+        secondaryColor = 0xF99B1D
     )
 
     @JvmField
@@ -47,8 +45,7 @@ object ElementalTypes {
         hue = 0x3FA5FF,
         textureXMultiplier = 2,
         primaryColor = 0x377AF6,
-        secondaryColor = 0x50DDF9,
-        order = 2
+        secondaryColor = 0x50DDF9
     )
 
     @JvmField
@@ -58,8 +55,7 @@ object ElementalTypes {
         hue = 0x62D14F,
         textureXMultiplier = 3,
         primaryColor = 0x0EAE95,
-        secondaryColor = 0xC6F554,
-        order = 3
+        secondaryColor = 0xC6F554
     )
 
     @JvmField
@@ -69,8 +65,7 @@ object ElementalTypes {
         hue = 0xFFD314,
         textureXMultiplier = 4,
         primaryColor = 0xF7AB19,
-        secondaryColor = 0xFFF257,
-        order = 4
+        secondaryColor = 0xFFF257
     )
 
     @JvmField
@@ -80,8 +75,7 @@ object ElementalTypes {
         hue = 0x54F2F2,
         textureXMultiplier = 5,
         primaryColor = 0x41BAED,
-        secondaryColor = 0x91F4F9,
-        order = 5
+        secondaryColor = 0x91F4F9
     )
 
     @JvmField
@@ -91,8 +85,7 @@ object ElementalTypes {
         hue = 0xEF565D,
         textureXMultiplier = 6,
         primaryColor = 0xC8356B,
-        secondaryColor = 0xF36A3F,
-        order = 6
+        secondaryColor = 0xF36A3F
     )
 
     @JvmField
@@ -102,8 +95,7 @@ object ElementalTypes {
         hue = 0xD651FF,
         textureXMultiplier = 7,
         primaryColor = 0x7B41DD,
-        secondaryColor = 0xE568F4,
-        order = 7
+        secondaryColor = 0xE568F4
     )
 
     @JvmField
@@ -113,8 +105,7 @@ object ElementalTypes {
         hue = 0xF4A453,
         textureXMultiplier = 8,
         primaryColor = 0xE08835,
-        secondaryColor = 0xFFD057,
-        order = 8
+        secondaryColor = 0xFFD057
     )
 
     @JvmField
@@ -124,8 +115,7 @@ object ElementalTypes {
         hue = 0xB8B2FF,
         textureXMultiplier = 9,
         primaryColor = 0x6083F6,
-        secondaryColor = 0xD5CCFA,
-        order = 9
+        secondaryColor = 0xD5CCFA
     )
 
     @JvmField
@@ -135,8 +125,7 @@ object ElementalTypes {
         hue = 0xFF5E9E,
         textureXMultiplier = 10,
         primaryColor = 0xE553CE,
-        secondaryColor = 0xF69DD5,
-        order = 10
+        secondaryColor = 0xF69DD5
     )
 
     @JvmField
@@ -146,8 +135,7 @@ object ElementalTypes {
         hue = 0xD3D319,
         textureXMultiplier = 11,
         primaryColor = 0x9FBE1B,
-        secondaryColor = 0xE9FB5B,
-        order = 11
+        secondaryColor = 0xE9FB5B
     )
 
     @JvmField
@@ -157,8 +145,7 @@ object ElementalTypes {
         hue = 0xB7A16E,
         textureXMultiplier = 12,
         primaryColor = 0x9F814A,
-        secondaryColor = 0xEECB7A,
-        order = 12
+        secondaryColor = 0xEECB7A
     )
 
     @JvmField
@@ -168,8 +155,7 @@ object ElementalTypes {
         hue = 0x9C80F7,
         textureXMultiplier = 13,
         primaryColor = 0x4F57DD,
-        secondaryColor = 0xC182F1,
-        order = 13
+        secondaryColor = 0xC182F1
     )
 
     @JvmField
@@ -179,8 +165,7 @@ object ElementalTypes {
         hue = 0x7580FF,
         textureXMultiplier = 14,
         primaryColor = 0x4E68E2,
-        secondaryColor = 0x47C7F7,
-        order = 14
+        secondaryColor = 0x47C7F7
     )
 
     @JvmField
@@ -190,8 +175,7 @@ object ElementalTypes {
         hue = 0x587DA0,
         textureXMultiplier = 15,
         primaryColor = 0x465B99,
-        secondaryColor = 0x689EBF,
-        order = 15
+        secondaryColor = 0x689EBF
     )
 
     @JvmField
@@ -201,8 +185,7 @@ object ElementalTypes {
         hue = 0xABD1F4,
         textureXMultiplier = 16,
         primaryColor = 0x628CB9,
-        secondaryColor = 0xD6F7F3,
-        order = 16
+        secondaryColor = 0xD6F7F3
     )
 
     @JvmField
@@ -212,21 +195,18 @@ object ElementalTypes {
         hue = 0xFF7FE5,
         textureXMultiplier = 17,
         primaryColor = 0xE2678C,
-        secondaryColor = 0xF5A7B7,
-        order = 17
+        secondaryColor = 0xF5A7B7
     )
 
     @JvmStatic
-    @JvmOverloads
-    fun register(name: String, displayName: MutableComponent, hue: Int, textureXMultiplier: Int, primaryColor: Int, secondaryColor: Int, order: Int = 1000): ElementalType {
+    fun register(name: String, displayName: MutableComponent, hue: Int, textureXMultiplier: Int, primaryColor: Int, secondaryColor: Int): ElementalType {
         return ElementalType(
             name = name,
             displayName = displayName,
             hue = hue,
             textureXMultiplier = textureXMultiplier,
             primaryColor =  primaryColor,
-            secondaryColor = secondaryColor,
-            order = order
+            secondaryColor = secondaryColor
         ).also {
             allTypes.add(it)
         }

common/src/main/kotlin/com/cobblemon/mod/common/api/vending/VendingMachineCatalogs.kt

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2023 Cobblemon Contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package com.cobblemon.mod.common.api.vending
+
+import com.cobblemon.mod.common.Cobblemon
+import com.cobblemon.mod.common.api.data.JsonDataRegistry
+import com.cobblemon.mod.common.api.molangui.ActionKey
+import com.cobblemon.mod.common.api.molangui.MolangUiActionContext
+import com.cobblemon.mod.common.api.molangui.MolangUiActionHandler
+import com.cobblemon.mod.common.api.molangui.ParameterValue
+import com.cobblemon.mod.common.api.reactive.SimpleObservable
+import com.cobblemon.mod.common.util.adapters.IdentifierAdapter
+import com.cobblemon.mod.common.util.cobblemonResource
+import com.google.gson.GsonBuilder
+import com.google.gson.reflect.TypeToken
+import net.minecraft.core.registries.BuiltInRegistries
+import net.minecraft.resources.ResourceLocation
+import net.minecraft.server.level.ServerPlayer
+import net.minecraft.server.packs.PackType
+
+data class CatalogEntry(val item: ResourceLocation, val price: Int)
+
+data class VendingMachineCatalog(val entries: List<CatalogEntry> = emptyList()) {
+
+    val pageCount: Int get() = if (entries.isEmpty()) 1 else (entries.size + PAGE_SIZE - 1) / PAGE_SIZE
+
+    fun clampPage(page: Int): Int = page.coerceIn(0, pageCount - 1)
+
+    fun pageParameters(page: Int): Map<String, ParameterValue> {
+        val safePage = clampPage(page)
+        val parameters = linkedMapOf<String, ParameterValue>(
+            "page" to ParameterValue.NumberValue(safePage.toDouble()),
+            "page_count" to ParameterValue.NumberValue(pageCount.toDouble()),
+            "page_text" to ParameterValue.StringValue("${safePage + 1}/$pageCount")
+        )
+        for (row in 0 until PAGE_SIZE) {
+            val entry = entries.getOrNull(safePage * PAGE_SIZE + row)
+            parameters["row${row}_item"] = ParameterValue.StringValue(entry?.item?.toString() ?: "")
+            parameters["row${row}_price"] = ParameterValue.StringValue(entry?.price?.toString() ?: "")
+        }
+        return parameters
+    }
+
+    companion object { const val PAGE_SIZE = 3 }
+}
+
+object VendingMachinePageHandler : MolangUiActionHandler {
+    val ACTION = ActionKey("vending_page")
+
+    override fun handle(context: MolangUiActionContext) {
+        val requested = (context.parameters["page"] as? ParameterValue.NumberValue)?.value ?: return
+        val catalog = VendingMachineCatalogs.catalog(VendingMachineCatalogs.DEFAULT)
+        context.session.updateParameters(catalog.pageParameters(requested.toInt()))
+    }
+}
+
+object VendingMachineCatalogs : JsonDataRegistry<VendingMachineCatalog> {
+    override val id = cobblemonResource("vending_machine")
+    override val type = PackType.SERVER_DATA
+    override val observable = SimpleObservable<VendingMachineCatalogs>()
+    override val typeToken: TypeToken<VendingMachineCatalog> = TypeToken.get(VendingMachineCatalog::class.java)
+    override val resourcePath = "vending_machine"
+    override val gson = GsonBuilder()
+        .registerTypeAdapter(ResourceLocation::class.java, IdentifierAdapter)
+        .create()
+
+    val DEFAULT = cobblemonResource("default")
+
+    private val catalogs = mutableMapOf<ResourceLocation, VendingMachineCatalog>()
+
+    fun catalog(id: ResourceLocation): VendingMachineCatalog = catalogs[id] ?: VendingMachineCatalog()
+
+    override fun reload(data: Map<ResourceLocation, VendingMachineCatalog>) {
+        catalogs.clear()
+        data.forEach { (id, catalog) -> catalogs[id] = validate(id, catalog) }
+        Cobblemon.LOGGER.info("Loaded ${catalogs.size} vending machine catalogs")
+        observable.emit(this)
+    }
+
+    override fun sync(player: ServerPlayer) = Unit
+
+    private fun validate(id: ResourceLocation, catalog: VendingMachineCatalog): VendingMachineCatalog {
+        val kept = catalog.entries.filter { entry ->
+            val known = BuiltInRegistries.ITEM.containsKey(entry.item)
+            if (!known) Cobblemon.LOGGER.error("Vending catalog '$id' drops unknown item '${entry.item}'")
+            else if (entry.price <= 0) Cobblemon.LOGGER.error("Vending catalog '$id' drops '${entry.item}' with price ${entry.price}")
+            known && entry.price > 0
+        }
+        return VendingMachineCatalog(kept)
+    }
+}

common/src/main/kotlin/com/cobblemon/mod/common/battles/ShowdownActionRequest.kt

@@ -117,9 +117,6 @@ abstract class ShowdownActionResponse(val type: ShowdownActionResponseType) {
 
 data class MoveActionResponse(var moveName: String, var targetPnx: String? = null, var gimmickID: String? = null): ShowdownActionResponse(ShowdownActionResponseType.MOVE) {
     override fun isValid(activeBattlePokemon: ActiveBattlePokemon, showdownMoveSet: ShowdownMoveset?, forceSwitch: Boolean): Boolean {
-        // Ensure that the gimmick ID the player is sending is valid
-        gimmickID?.let { if (it !in VALID_GIMMICK_IDS) return false }
-
         if (forceSwitch || showdownMoveSet == null) {
             return false
         }
@@ -171,10 +168,6 @@ data class MoveActionResponse(var moveName: String, var targetPnx: String? = nul
         gimmickID = buffer.readNullable { buffer.readString() }
         return this
     }
-
-    companion object {
-        private val VALID_GIMMICK_IDS = ShowdownMoveset.Gimmick.entries.map { it.id }.toSet()
-    }
 }
 
 data class HealItemActionResponse(var item: String) : ShowdownActionResponse(ShowdownActionResponseType.FORCE_PASS) {
@@ -190,8 +183,7 @@ data class HealItemActionResponse(var item: String) : ShowdownActionResponse(Sho
     }
 
     override fun isValid(activeBattlePokemon: ActiveBattlePokemon, showdownMoveSet: ShowdownMoveset?, forceSwitch: Boolean): Boolean {
-        // Previously checked for !forceSwitch, excepts in the case of a forceSwitch, this couldn't legally be sent anyway.
-        return false
+        return !forceSwitch
     }
 
     override fun toShowdownString(activeBattlePokemon: ActiveBattlePokemon, showdownMoveSet: ShowdownMoveset?): String {

common/src/main/kotlin/com/cobblemon/mod/common/battles/interpreter/instructions/MoveInstruction.kt

@@ -37,6 +37,7 @@ import com.cobblemon.mod.common.util.asIdentifierDefaultingNamespace
 import com.cobblemon.mod.common.util.battleLang
 import com.cobblemon.mod.common.util.cobblemonResource
 import java.util.concurrent.CompletableFuture
+import net.minecraft.world.entity.LivingEntity
 
 /**
  * Format: |move|POKEMON|MOVE|TARGET
@@ -76,7 +77,7 @@ class MoveInstruction(
             val pokemonName = userPokemon.getName()
             ShowdownInterpreter.lastCauser[battle.battleId] = message
             // For Spread targets the message data only gives the pnx strings. So we can't know what pokemon are actually targeted until the previous messages have been interpreted
-            val spreadTargetPokemon = spreadTargets.map { battle.activePokemon.firstOrNull { poke -> poke.getPNX() == it }?.battlePokemon }
+            val spreadTargetPokemon = spreadTargets.map { battle.activePokemon.firstOrNull() { poke -> poke.getPNX() == it }?.battlePokemon }
 
             val targetPokemonEntity = targetPokemon?.entity
             if (targetPokemonEntity != null) {
@@ -136,20 +137,10 @@ class MoveInstruction(
 
             val subsequentInstructions = instructionSet.findInstructionsCausedBy(this)
             val missedTargets = subsequentInstructions.filterIsInstance<MissInstruction>().mapNotNull { it.target }
-            val faintedTargets = subsequentInstructions.filterIsInstance<FaintInstruction>().map { it.faintingPokemon }
             val failed = subsequentInstructions.any { it is FailInstruction }
             val failedTargets = subsequentInstructions.filterIsInstance<FailInstruction>().mapNotNull { it.target }
             val hitCountInstruction = subsequentInstructions.filterIsInstance<HitCountInstruction>().firstOrNull()
 
-            runtime.environment.query.addFunction("target_fainted") { params ->
-                if (params.params.size == 0) {
-                    return@addFunction DoubleValue(faintedTargets.isNotEmpty())
-                } else {
-                    val entityUUID = params.getString(0)
-                    return@addFunction DoubleValue(faintedTargets.any { it.entity?.stringUUID == entityUUID })
-                }
-            }
-
             runtime.environment.query.addFunction("missed") { params ->
                 if (params.params.size == 0) {
                     return@addFunction DoubleValue(missedTargets.isNotEmpty())