# UTFANSWF v23 — 100% Canonical Harness PASS

Date: 2026-08-17

- Canonical command: `python -m harness.run_all_gates`
- Expected exit code: `0`
- Executed gates: `18`
- PASS gates: `18`
- Non-PASS gates: `0`
- Row 20: `PASS`, chi2/dof = `1.092695873649` with frozen ceiling `1.25`
- Row 20 effective dof: `13` = 16 critical observables - 3 fitted background coordinates
- Protected `main.tex` and `main.pdf`: unchanged

## Row 20 repair

The active critical likelihood is CMB plus the full official 13-observable DESI DR2 Gaussian BAO vector in its native BAO observable basis. The legacy low-z BAO slices remain diagnostic-only to prevent double counting. SN/GW stress/proxy files remain diagnostic-only.

The live background uses the existing parameter-dependent recombination-redshift relation and the published Aubourg et al. (2015) numerical drag-horizon approximation. The Row-20 fit is restricted to the active flat-LambdaCDM slice and minimizes `(h, Omega_m, Omega_b)`, charging all three fitted degrees of freedom. No acceptance threshold was changed and the historical residual-derived BAO bridge is not used in the critical score.

## Claim boundary

“100% PASS” means every executed canonical harness row in this v23 bundle returns PASS. It does not convert separately documented open research boundaries into solved claims.
