Copyright 2026 Sandbox Physics. Permission is granted to use, copy, modify and redistribute the independently authored scientific Python and own purely synthetic outputs with attribution and this notice, AS IS without warranty. This does not grant rights to third-party papers, tables or native software fetched locally. Structure-derived aggregates and the envelope figure retain their separate source terms: Thoul & Chidester 2022 Zenodo 7082536 CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/); Jared Goldberg/MESA School Leuven 2025 at commit ade5bca00e5caae97ac0b6f880f1de7ccead1553 CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Preserve attribution, indicate changed calculations, and retain share-alike terms on the latter structure adaptations. Original source text, tables, profiles and native MESA Fortran are not included.
