KAEL: a self-certifying lattice medium whose transport generator turns out to be curved-space Dirac evolution
KAEL is a single, dependency-free Python file (~1,800 lines, stdlib only) that builds an exact algebraic core and, on top of it, a small 2D lattice spinor medium. It runs its own 16-check self-certification on load. Everything below was independently re-derived and measured against the unmodified engine, not read off i...