Phase 56 · the phase speed limit · AT-0493 → AT-0508

Every part of the shortcut must stay cheap, or none of it counts

Seed 493. Phase 55 left one weakness in the physics and one in the method: the two-phase rule was switched by hand, and the advantage was reported as a single ratio. Both are fixed here. A single frozen excitable law now evolves the order field, decides which couplings are accessible, and restores the ordinary phase through its own refractory tail — no external reset exists in the model. And the advantage is decomposed: nucleation, transit, restoration, preparation, debt and action are fitted separately, each one required to converge and to survive a lower-bound audit before it may be called sublinear.