Protocol-Driven Direction-Dependent Transport in Chiral Magnets: A Fixed Contract Approach

This manuscript presents a protocol-first certification of direction-dependent (nonreciprocal) transport in chiral magnets under a fixed G–Sigma–P–L contract, converting recent “chiral electron street” observations into a tokens-only, replayable, and falsifiable procedure rather than a mechanism narrative. The contribution is not a new physical effect, but a disciplined method that forces sign structure to be earned through preregistered flips, preserves zeros and yield via STLF ternary logging, and blocks threshold travel through explicit freeze-contract rules. A signed odd-lane spine is minted only when it survives ZFlip persistence, flip-only drills, and even-lane bounds, while multi-mechanism interpretations are accepted only as stable, corridor-limited ledger fits across temperature and field sweeps. Lightweight ternary-knob hygiene keeps zeros distinct from signs, SoZ defines no-test bands where further scanning is invalid, and an optional Strong versus Strong-to-Weak tag labels internal robustness without altering acceptance. The result is a portable, bench-replayable framework for deciding—using ledger tokens alone—when a chiral-magnet device genuinely supports direction-dependent electron transport, even in room-temperature regimes with dynamical reconfiguration.