nx_twinfit_gate.nx

nx_twinfit_gate.nx -- the referee for nx_twinfit_lib (aesthetictwin AT34 / AT35 / AT40, 2026-09-17). The target reader is held to a planted file (five axes, a bogus axis row that must be ignored, an absent file that must read zero); the reach predicate to both sides of its band; the level arithmetic to the declared ranges; the fit from stated landmarks; then the render lane on the seed-42 identity whose render the outside oracle also judged: the in-process measurement places both eyes, the lip unit's surface ratio agrees with its statement, and the same identity through the PNG door (nx_twinface's path) decodes to the in-process render byte for byte and reproduces the in-process tilts and ratios exactly. The eye unit's landmark truth (AT39) has its own gate, nx_twintruth_gate, since 2026-09-18: its fixed-step surface scans were 58% of this gate's runtime and the whole no longer fitted the roster's per-gate deadline. AT44 (2026-09-18) holds the photo ruler on the same in-process render (no new render) to the construction: its mouth landmarks against the lip unit's projected statement, its lip ratio (4909 permil before AT44 against a constructed 612) within a pixel per line of the projected ratio, its canthi against the stated corners with neither lateral canthus on its band's edge. Every phase prints its wall time. Values are printed with gv_kv. license_tier: ORIGINAL No hw writes (Rule 26).