nx_voxchunk_gate.nx

nx_voxchunk_gate.nx -- CERTIFICATION of nx_voxchunk (gamebench gap-queue rank 1: voxel-world-chunked). The craft world is a FIXED volume; the capability's bar is Minecraft-class STREAMING: unbounded land through a bounded resident set. Each tooth is one way real chunked engines die: T1 DETERMINISTIC REGEN -- load->evict->reload of virgin land is bit-identical; two worlds same seed agree T2 EDITS SURVIVE EVICTION -- a dirty chunk is flushed (nx_gamesave) before slot reuse and reloaded from disk, not regenerated; losing edits on eviction is THE chunk-corruption class T3 BOUNDED RESIDENCY -- a 200-chunk walk never exceeds `cap` resident chunks; memory is bounded BY CONSTRUCTION, and evictions actually happened (the bound was exercised, not idle) T4 SEAM + GEN CONSISTENCY -- world-coordinate access at chunk borders matches the pure height function on both sides of the seam, resident or not T5 WHOLE-WALK DETERMINISM -- two worlds, same seed, same 300-op edit/read script with eviction churn -> identical probes and identical live checksum T6 SESSION DURABILITY -- flush + whole-arena gs_save -> load into a ZEROED arena -> identical continued behaviour; knowledge/nx_voxchunk_world.sav is the board evidence T7 ANTI-VACUITY -- distinct chunks genuinely differ, edits genuinely change blocks, the disk path was genuinely taken (flushes>0, disk_loads>0) T8 BOUNDED + LOUD -- out-of-range y / block value refuse with a DISTINCT code and change nothing license_tier: ORIGINAL expect_exit: 0