This stand-alone preprint presents a closed-wave origin-layer framework in which the electron and proton are treated as outward and inward mirror endpoint readouts of one closed wave state W. The manuscript begins from the finite electron-shell sequence 2-8-18-32-32-18-8-2 and asks why the outward electron branch does not expand without bound. Using the reciprocal mirror relations Re(d)=dR0 and Rp(d)=R0/d, the paper formulates an anti-infinity closure principle: an admissible closed wave state cannot become either an unbounded outward line or an inward zero-radius point. Within this framework, gravity is interpreted as a closure reaction Λcl that preserves the closed-wave condition. The external inverse-square readout is expressed as a spherical surface-flux projection ΛS/(4πr²), while inertia reads the same test-object closure burden ΛT that appears in gravitational coupling. This gives a structural cancellation of ΛT in free-fall acceleration. The four interaction channels are organized as projection readouts of the same closed state W: electromagnetism as signed endpoint difference, gravity as unsigned total closure burden over 4πr², the strong interaction as high-density inward core-lock, and the weak interaction as channel-reclosure conversion. The package includes the manuscript source, PDF, build materials, and reproducibility code audits CODE 8100-503 through CODE 8100-508. The latest cumulative audit reports 38/38 PASS checks, including anti-infinity mirror closure, endpoint-release ionization behavior, mass/ionization lens separation, gravity-inertia cancellation, strong/weak projection taxonomy, and reviewer-objection control audits. The reviewer-objection controls explicitly reject the naive raw d⁴/Nd blow-up model as a wrong-control readout, separate closure bookkeeping from permanent radioactive stability, and distinguish sealed-reference validation from prediction-only lockbox rows. The claim is deliberately bounded. This work is not presented as a replacement for general relativity, quantum field theory, QCD, electroweak theory, nuclear theory, or quantum chemistry. It does not claim to derive the dimensional Newton constant G, exact strong or weak coupling constants, W/Z boson masses, decay lifetimes, scattering cross sections, or a physical black-hole core radius. The finite-core black-hole statement is presented as a structural origin-layer prediction following from mirror-closure grammar, requiring future connection to relativistic compactness, stress-energy structure, horizon formation, stability, and observational signatures.
S. W. Hong (Thu,) studied this question.