2.0.2

1. What's New in 2.0.2

1. Sky Cell Culling & Density Truncation (terrain.sky_cells, terrain.sky_truncate):
   • Skips expensive 3D noise router and density function evaluations for high-altitude air volumes above the max terrain surface.
   • Saves up to 57% of density branch evaluations on terrain generation threads with strict mathematical equivalence.
   • Enforced aquifer barrier safety: safe truncation boundary is mathematically bounded to skipSamplingAboveY + 1, completely preserving high-altitude mountain lake barriers and preventing fluid leakage.
2. Noodle Cave Pre-Bounding (terrain.noodle_bound):
   • Bounds noodle cave noise queries early to skip irrelevant underground sub-evaluations.
3. Thread-Safe Structure Jigsaw List Caching (Minecraft 26.3):
   • Caches immutable template pool target lists during heavy jigsaw structure placement using thread-safe AtomicReferenceArray publication, eliminating repetitive heap allocations and completely eliminating data races on multi-threaded worker pools (C2ME).
   • Invalidation on reload: automatically flushes cache on /reload or template reload.
4. Dimension-Isolated Structure Layout Slicing (Roguelike Dungeons):
   • Partitions time-sliced dungeon generation by dimension (ResourceKey<Level>), preventing cross-dimensional session pruning and infinite room planning resets in the Nether and the End.
5. Zero-Stall Structure Context Guard (O(1) Gate 0 Priority):
   • StructureCallerContext fast thread-local check elevated to top priority in UniversalStructureDetector, bypassing burst counts and 20-tick cooldowns. Eliminates 700–2500 ms server thread freezes and deadlocks with C2ME workers.
6. Optimized NBT Chunk Palettes & Boundary Safety (Minecraft 26.2):
   • Direct palette serialization to NBT bypassing slow DataFixerUpper codec chains on generation worker threads.
   • Region boundary guard queries getLatestStatus() in memory, preventing erroneous AIR block and Y = -64 replacement for freshly generated in-memory chunks.
7. Live In-Mod Referee (Zero World Divergence Guarantee):
   • Continuous live self-check compares optimized routines against vanilla logic:
     • Chunk palette direct tags vs vanilla codec: 20,000 containers compared, 0 differences.
     • Biome climate column cache vs game samples: 1,000,448 samples compared, 0 differences.
     • Jigsaw element lists vs game lists: 8,218 lists compared, 0 differences.
     • Sky truncation voxel fills vs vanilla fills: 49+ fills compared, 0 differing voxels.
     • Fail-open fallback: automatically reverts to vanilla behavior if any anomaly is encountered.

2. Speed Benchmarks: 2.0.2 vs 2.0.1

All benchmarks were run on dedicated Oracle Cloud VM stands (VM1 & VM2, A1 2 ARM cores, dedicated pinning, seed 20260923, identical modpacks).

Minecraft 26.2 (Fabric Stand VM1, 110 mods, 961 chunks)

Minecraft 26.3 (Fabric Stand VM2, 110 mods, 961 chunks)

3. Multi-Loader Stability: Round 2 Verification (Final Jar)

Every supported mod loader was verified in live generation runs using the final release jar (e018a9f6).

4. World Equivalence & Divergence Audit (Round 2)