nx_morpho_rd_gate.nx

nx_morpho_rd_gate.nx -- MORPHOGENESIS CORE rung 1: volumetric tissue growth by 3D Gray-Scott reaction-diffusion, driven from a compact genome. This is the "Infinigen layer" for anatomy: no organ meshes are stored, the structure GROWS from a seed + a handful of genome scalars. ★SUBSTRATE CORRECTIONS vs the proposal, deliberate and load-bearing: (1) NishiLang, not C. C is bench-oracle-only here by standing law; product paths are sovereign .nx. (2) ALL-INTEGER Q16 fixed point, not float. Our measured sovereign exceed is BIT-EXACT DETERMINISM (identical replay -> identical checksum, proven in nx_gx4_walk). Floats would hand that away for nothing -- reaction-diffusion needs no float, and T6 below PROVES the determinism we would have lost. (3) Renders through our own raster path, not Vulkan/DX12 (host GPU APIs are exactly what the sovereign steer forbids). The eyeball artifact goes out through our canonical PNG writer. GATE = known-answer MATH first, emergence second. A pattern that merely "looks organic" proves nothing; the Laplacian is checked against exact discrete identities (constant->0, linear->0, x^2->2), the trivial steady state is checked to be genuinely steady, and only THEN is emergence measured. license_tier: ORIGINAL expect_exit: 0