What This Establishes and What Remains Open

What this paper establishes

The structural form of the baryon asymmetry, η = E(ε) / (1 + E(ε)), derived from the core axiom read as an energy partition (Proposition 1). The topological protection of the surplus, because ε has no σ-image (Proposition 2, via AP22). The connection of the surplus to the leakage constant and to AP24’s self-consistency, which locks E(ε) to the other fundamental constants. The structural account of why there is matter rather than only light is complete.

What this paper does not do

It does not derive the numerical value of E(ε), and so does not derive the value of η. That value — including the energy-to-number coefficient g_eff — is owed under KS-60.

Items held open without claiming debt status

Which of the two paths to the value (direct spectrum computation, or the AP24 fixed-point method) is the right route. Both are sketched in §6.2. Separately, the cross-horizon mass balance that underwrites the surplus is held open as AP22’s KS-47 (mass accounting behind all horizons), inherited here rather than closed.

Where the philosophical-register implementations live

AP26 is formal-register throughout. η appears among the five derived numbers read in plain language in Ø Predictions (Ø Models catalogue); the matter–antimatter asymmetry is read structurally, from the binary character of B at primordial coupling sites, in Ø Resolutions. Neither is a dedicated companion to the energy-partition reading itself — the surplus-as-ash treatment has no single expository twin in the present Ø Models catalogue, and this is recorded rather than papered over.

Structural relationships to subsequent work

AP26 closes Notebook V — Particles and Matter. With AP30 (mass), AP22 (antimatter), and AP26 (the surplus) in place, the matter sector is built: the break has produced spacetime, the quantum record, the forces and constants, and now the matter those constants weigh.

The 420 Code placement

Notebook V — Particles and Matter, Chapter 3.

The closing

Nothing tipped the balance. The balance was never there. The axiom was 1:1 + 1×ε @ AS from the beginning, and the surplus is the break itself. You are the one uncancellable entry, read at the scale of a universe — the ash of a crack whose coupling face has depth α ≈ 1/137 (the surplus itself being the energy face, E(ε)).