Design Blueprint: A Phase-Step Position Encoder with Nanometre-Scale Computed Resolution and a Full Accuracy Budget

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24129680): Resolution is the cheapest specification in position encoding and accuracy is the expensive one; data sheets quote the first and bury the second. 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.