We present a unified SIGINT detector that fusesATL/TWPA hardware priors with physics-correct, pumpreferenced idler proximity scoring (IPS). By separating 3WM and4WM processes, applying selective stopband penalties, and autotuning weights via grid search, the method achieves +5.5% PRAUC and -38% FPR@95%TPR versus SNR-threshold baseline.Real TWPA data confirms idler alignment within ±3 ppm.Integration uses five ops-stack hooks; … Continue reading Unified Design-Informed SIGINT: Fusing ATL/TWPA Priors with Adaptive Idler Proximity Scoring