nx_wasm_mineworld_mod_gate.nx

nx_wasm_mineworld_mod_gate.nx -- gate for BLOCKS-AS-DATA (the first loose-coupling rung of the moddable architecture; operator: games = data-io + logic layers, mods change data, no recompile). T1 the built-in DATA pack lazy-loads and the world renders (frame mostly terrain). T2 a MOD = runtime data records: override grass -> RED via blk_set -> the SAME world re-renders visibly differently (re-skin live, zero recompile) + PNG knowledge/nx_mineworld_mod.png (eyeball: red world). T3 pack reset restores the base pack -> frame BYTE-IDENTICAL to T1 (reversible, deterministic). T4 boundaries: block id 0 / >=MAXBLK REJECTED; an undefined in-range block renders LOUD MAGENTA (never silent). T5 determinism re-render. license_tier: ORIGINAL expect_exit: 0