We study the three-dimensional incompressible Navier--Stokes equations near a hypothetical first singular time through a same-scale closure scheme built on caloric lifts. The paper isolates a geometric endpoint package whose conclusion is a packet-closure target on terminal same-scale windows, and proves a restart-side closure that converts this target into a canonical terminal packing contradiction. The caloric lift provides the common analytic interface: it supports the same-scale quadratic compression package on the geometric side and the restart mechanism in the Koch--Tataru critical norm on the analytic side. The final contradiction is organized through two main arguments---geometric endpoint synthesis and restart-side closure---with orbital, shell, cross-scale, and forcing-side reformulations retained only as supplementary localisation or comparison packages. This yields a direct same-scale contradiction scheme for ancient-core limits selected by tail-good restart sequences.
David Giannaccini (Mon,) studied this question.