A floor you can only walk is a rumor. Tonight we build what the
theory face holds to its own throat: an S-curve that answers to a
slider, a scene graph that renders the kernel honestly,
and a tuning fork with exact rationals — every number on this
page proven by episode-4/smoke.mjs (14 checks, node-first, all green).
Measured, not recited: the commensuration comb is silent below r≈3.4 on this floor and wakes at r=5.5 — windows at 5.00° and 7.75°. And the tuning fork corrects our own canon: π/(2φ) is not 4/13; it is 133/137, −0.0037 cents. The instrument's job is to say so.