I retracted my own launch claim in public commits, then shipped what survived.
MK-SH-1 is a 140M decision model I built on an open encoder. It returns calibrated probabilities, a choice, and an explicit abstention below a frozen gate (tau = 0.79, written down before the curve existed).
ECE 0.016 · 90% coverage in-sample; held-out numbers in the card · 106 ms on CPU.