nx_proportion_guard.nx

nx_proportion_guard.nx -- FINITE plausibility envelopes for body axes. nx_canon_proportions.nx already seals the axis vocabulary (NX_AXIS_*, ids 1..32) and the RATIO canon (this ratio should be phi-ish, within tolerance). What it does not carry is an ABSOLUTE envelope: a body can satisfy every ratio and still be 3 metres tall. Ratio-only checking is exactly how an alien figure passes review. THE LAW THIS ENCODES (operator, 2026-07-30): a human being has a finite range, and even idealized or fantasy forms have finite proportions -- wider, differently centred, still bounded. So regimes are DATA and every one of them is closed at both ends: HUMAN -- population range for an adult female IDEALIZED -- narrower aesthetic band, strictly INSIDE human-possible KIN -- monsterkin/fantasy: wider than human, still finite by construction ★THE DESIGN DECISION THAT MAKES THIS A GUARD: an axis with no bound row REFUSES. Treating "no bound" as "anything goes" is how impossible values get in -- the same shape as a capability-denied read being mistaken for "unavailable". Missing is not permission. Callers must REFUSE on a non-zero verdict, never silently clamp: a clamped body is a lie told to whoever reads the number back. PROVENANCE (honest): the rows below are literature-typical adult-female ranges entered by hand, not yet an ingest of a measured anthropometric dataset. They are bounds we can defend as plausible, not bounds we have measured ourselves -- see the debt filed alongside this file. Widen or narrow them by MEASUREMENT, never by feel. license_tier: ORIGINAL No hw writes (Rule 26).