Architecture and Mixins

🏗️ Architecture & Mixin Target Reference

This document outlines package architecture, test suites, and provides an exhaustive breakdown of all Java Mixin injection targets in Agrarian Reform.

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📦 Package Architecture Hierarchy

net.instantgratification.agrarianreform
├── AgrarianGameRules.java         # 15 static GameRules & transient debug mode
├── AgrarianReformFabric.java      # ModInitializer entrypoint, lifecycle hooks, 6D use-block
├── client
│   └── AgrarianReformClient.java  # ClientModInitializer & morning moisture tint
├── config
│   ├── AgrarianConfig.java        # Global JSON config template (Schema v2) & dirty-tracking
│   ├── ModMenuIntegration.java    # ModMenu API integration
│   └── YaclScreenHelper.java      # Isolated 3-tab YACL v3 client GUI builder
├── continuum
│   ├── ContinuumData.java         # SavedDataType dimension persistence & 30-day pruning
│   ├── ContinuumManager.java      # ServerChunkEvents listeners & 5-crops/tick queue
│   └── CropScanner.java           # Sub-chunk palette pre-filtering & speed estimator
├── crop
│   └── AgrarianCropRules.java     # O(1) universal crop auto-population & dynamic GameRules
├── mixin
│   ├── BlockColorsMixin.java      # Client block color provider intercept
│   ├── BlockStateBaseMixin.java   # Random tick speedup/slowdown & max-age early-break
│   ├── CropBlockMixin.java        # Growth speed, rain spurt, rustle sound mixin
│   └── FarmlandBlockMixin.java    # Soft Step trample & Chebyshev concentric hydration
├── util
│   ├── AgrarianTags.java          # Datapack tag keys (#c:crops, #soft_step_boots)
│   ├── GrowthHelper.java          # Concentric Chebyshev math, bare-foot trample logic
│   ├── ModVersionGuard.java       # Startup API class check guard (Knot resolution)
│   └── SoundHelper.java           # Audio debouncing & primitive Int2Long collections

Headless Test Architecture (src/test/java)

net.instantgratification.agrarianreform
├── config
│   └── AgrarianConfigTest.java    # Schema stability, multiplier hierarchy, dirty tracking
└── continuum
    └── ContinuumMathTest.java     # Delta math, frozen scaling, 30-day pruning, Chebyshev geometry

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🎯 Complete Mixin Target Table

Mixin Class	Target Minecraft Class	Annotation & Injection Point	Purpose
FarmlandBlockMixin	net.minecraft.world.level.block.FarmlandBlock	@Inject(method = "fallOn", at = @At("HEAD"), cancellable = true)	Intercepts trample with bare-foot fast-fail, Soft Step, and trample_immunity_players_only gating.
FarmlandBlockMixin	net.minecraft.world.level.block.FarmlandBlock	@Inject(method = "isNearWater", at = @At("HEAD"), cancellable = true)	Replaces 4-block water check with expanding Concentric Chebyshev shells ($r=1 \to \text{maxRange}$, 3D $y \in [-1, 1]$) and pure water gating.
CropBlockMixin	net.minecraft.world.level.block.CropBlock	@ModifyReturnValue(method = "getGrowthSpeed", at = @At("RETURN"))	Applies +10% polyculture biodiversity growth bonus for adjacent diverse crops.
CropBlockMixin	net.minecraft.world.level.block.CropBlock	@Inject(method = "randomTick", at = @At("HEAD"), cancellable = true)	Pre-tick rain spurt acceleration (advances stage during rainfall).
CropBlockMixin	net.minecraft.world.level.block.CropBlock	@Inject(method = "randomTick", at = @At("RETURN"))	Post-tick vitality Happy Villager green sparkles when stage changes.
CropBlockMixin	net.minecraft.world.level.block.CropBlock	@Inject(method = "entityInside", at = @At("HEAD"))	Triggers crop rustle sound effect with debounced entity cooldowns.
BlockStateBaseMixin	net.minecraft.world.level.block.state.BlockBehaviour$BlockStateBase	@Inject(method = "randomTick", at = @At("HEAD"), cancellable = true)	Intercepts plant random ticks to scale speed per-crop and breaks early upon reaching max age.
BlockColorsMixin	net.minecraft.client.color.block.BlockColors	@Inject(method = "createDefault", at = @At("RETURN"))	Registers morning moisture soil tinting (ticks 23000 to 2000).

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💾 World Storage vs Chunk NBT Architecture

Agrarian Reform strictly decouples its persistent timestamp data from individual chunk files:

┌─────────────────────────────────────────────────────────────┐
│                      STORAGE SEPARATION                     │
├─────────────────────────────────────────────────────────────┤
│ 1. DIMENSION STORAGE (data/agrarian_reform_continuum.dat)   │
│    ├── ContinuumData (SavedDataType)                        │
│    └── Stores Map<ChunkPos (Long), UnloadTimestamp (Long)>  │
│    └── Auto-prunes entries older than 30 days on save       │
│    └── Zero impact on chunk NBT or chunk dirty flags        │
│                                                             │
│ 2. CHUNK STORAGE (region/r.X.Z.mca)                         │
│    ├── LevelChunk NBT (Block States, Tile Entities)         │
│    └── ChunkAccess.unsaved flag                             │
│    └── Only marked TRUE when setBlock() changes a state     │
└─────────────────────────────────────────────────────────────┘

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See also: The Continuum (Offline Growth), Performance & Queue Throttling, and Developer Setup & Building.