BU59 Planck Scale under B_U Microscopic Debt-Zeroing Zone, Particle-Black-Hole Intersection, and the Reclassification of Quantum-Gravity Cutoff

This paper develops BU59 as a B_U-based reclassification of the Planck scale as a projection-level extreme redline readout. Its central claim is that the Planck scale is not the ontic boundary of B_U itself and not the endpoint of total reality. It is the extreme readable window formed in backward-mirror physics when \hbar, G, and c enter the same scale, forcing microscopic localization, strong-gravity compression, quantum disturbance, and classical geometry into simultaneous audit pressure. BU59 clarifies the particle–black-hole intersection. The Compton localization redline pushes particle identity toward microscopic audit pressure; the Schwarzschild strong-compression redline pushes mass concentration toward horizon readout. When these two redlines meet in order of magnitude, the system enters the Planck window. In this window, particle readout and black-hole readout jointly lose their ordinary settleable form. The Planck scale therefore marks not a smaller object, but the limit of projection-level objecthood, pathhood, and geometry under extreme audit conditions. The paper further defines the Planck window as the extreme working readout of D(M)’s dynamic-completeness audit in the projection stratum. Fast microscopic variables may occur, oscillate, and deliver local occurrence, but they cannot net-accumulate into the macroscopic ledger. Classical description fails here not because reality loses structure, but because lower-order reality grammar lacks the bandwidth to carry the clearing, cutoff, reclassification, and settlement pressure of this scale. The final judgment is that the Planck scale is the extreme intersection redline where ordinary particle, black-hole, and classical-geometric readings must be reclassified.