Design Blueprint: A Drag-Free Torsion Balance in Low Earth Orbit Searching for a Spin-Dependent Differential Acceleration

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24142387): This paper presents a space mission design, computed from stated assumptions and not measured, built to measure one quantity: the differential acceleration attributed to a spin-dependent torsion coupling, for which the design case adopts 6.50e-15 metres per second squared. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.