Data for "Learning Limits of Contact-Switching Mechanisms: A Closed-Form Convergence Floor"

Mechatronics submission): (i) the preregistered floor prediction tables, archived on 2026-09-13, more than two days before the first learning run — the reference values against which Section IV of the paper decides; (ii) the campaign data underlying all figures and statistics: the 840-trial boundary campaign (post pose gate), the 240-trial cross-mode transfer campaign, the input table of the 118-point floor-parity comparison, the weight-sweep (lambda) series, and the remaining analysis-grade JSONs (theory-side checks, calibration, leakage and leave-one-cell-out audits); (iii) README.md, with a timeline mapping each file to the protocol narrative of Section III of the manuscript; (iv) TRANSLATIONS_NOTES.md, with English renderings of the Chinese metadata fields carried by the JSONs.

Original file modification times are preserved and constitute the inner layer of the preregistration evidence (the deposit date is the outer layer).