nx_chartlay_lib.nx

nx_chartlay_lib.nx -- THE ONE chart-layout ruler for every SVG chart the compare emitters draw (datavis DV1, 2026-09-15). Domain-fit scales with nice ticks, integer linear scaling, a colour-blind-safe categorical palette (Okabe-Ito, the house accent in slot 0), text-width estimates, greedy collision-free label placement with leader lines, and the READABILITY CRITIC (label-label, label-mark and mark-mark overlaps, off-canvas labels, data spread) so a render GRADES ITSELF before it ships and prints the grade beside the picture. Born of the operator's 2026-09-15 junk verdict on the position map: five marks in one corner of a fixed 0..1000 canvas, labels overlapping and clipped at the right edge, a cube nobody could read. Pure integer arithmetic, struct-free, so the laptop toolchain proves it too. The field's practice this encodes (Datawrapper, Observable Plot, Vega-Lite: 4..7 gridlines, axes fit to the data with a breathing pad, direct labels that never collide, one palette that survives colour-vision deficiency) is the ORACLE; nothing here links, forks or shells any of them -- they stay outside the build path as liar-killers and benchmarks. license_tier: ORIGINAL