Spin-Caloritronic Heat Control Under A Fixed Corridor: Tokens-Only Replay And 4S3 Closure

Definitive — This work presents a groundbreaking framework for controlling thermal transport in ferromagnetic metal/insulator junctions at room temperature, using magnon transport. The study offers a critical, new method for auditing experimental claims by applying the G–Sigma–P–L / 4S3 framework, ensuring reproducibility and portability across different labs and material families. Key innovations include the direct corridor-style formulation of magnon engineering, the introduction of the P-lane coordinate system, and the development of a falsifier-first ledger system. These techniques enable precise control and validation of thermal transport modulation, providing a foundational, reusable infrastructure for future experiments in spin-caloritronics. By incorporating tokens-only replay and fixed-corridor contracts, the work guarantees that the experimental outcomes are not just repeatable but auditable, solving long-standing issues of data consistency and validation. This methodology promises significant advancements in the operationalization of quantum heat control.