nx_sovereign_surface_gate.nx

nx_sovereign_surface_gate.nx -- PROVES, mechanically, that the Breeders stack is emitted from NishiLang FROM THE FIRST BYTE UP and that ONE frame is interoperable across the sovereign surfaces. (operator 2026-07-27: "make sure we are emitting from nishi lang from the first byte up not building into 3rd parties but we do want it to be interoperable aka nishi os and browser first then making it work on android or windows etc") ★WHY A GATE AND NOT A PROMISE: rule 26's discipline -- a sovereignty claim must be proven mechanically, never asserted. So this gate READS ITS OWN DEPENDENCIES' SOURCE OFF DISK and fails if any of them reaches outside the nx_* namespace. A future session cannot quietly `import` a third-party shim and keep the green, because the check is structural rather than documentary. THE INTEROP CONTRACT UNDER TEST -- ONE framebuffer, many sinks, no conversion library: packed i64 per pixel, R | G<<8 | B<<16 (nx_game_raster's format) -> NishiOS : the same word order the sovereign display controller + UEFI GOP sink consume -> Nishi Browser: byte 0=R,1=G,2=B of each i64 read straight out of linear memory by the canvas blit (the loader contract the emitted pages already use) -> PNG : nx_png_write_rgb, our own encoder (STORED zlib, no third-party deflate) -> Android/Windows: reachable BECAUSE the core is integer-only -- no float, no FPU rounding mode, no endian-dependent struct punning -- so a byte-identical result on a different ISA is a property of the code, not a hope. T5 proves determinism; the aarch64/x86 backends are the graphics lane's Gx-2 rung, NOT claimed here. license_tier: ORIGINAL