# UTFANSWF v23 Reproducibility-Side Gravity/GW Closure Revision

Date: 2026-08-20

This revision updates the executable/reproducibility layer only. The protected manuscript files `main.tex` and `main.pdf` are intentionally unchanged and retain their prior SHA-256 hashes.

Integrated closures:
- canonical EH+R^2 tensor map: alpha1=0, cT^2=1, mT^2=0;
- Mstar and GW friction nu owned by the scalaron mass m_s;
- canonical stationary Kerr horizon response: R_NZH=0, epsilon_1=0, Upsilon=0;
- axion/echo universality expressed at response-operator level with channel projections rather than a direct scalar channel equality;
- Row 25 canonical echo-detection requirement retired; nonzero reflective extensions remain optional/noncanonical.

The R^2 metric-variation factor-of-two issue identified in the dated manuscript is documented in the closeout files under `research/pre_pdf_global_closure/`; it is not silently edited in the protected v22-era manuscript source.

Canonical command remains:

```
python -m harness.run_all_gates
```
