add README landing page

README.md

@@ -33,23 +33,27 @@ is maintained under the organization account (see "Code repository" below).
 
 ## Code repository
 
-The evaluation scripts, regression test suite, and atomic-swap deploy
-tooling will be released at:
+Public benchmark + evaluation scripts:
 
-- **`github.com/humanswith-ai/contentos-benchmark`** (public, planned within ~2 weeks following the v1.12 RU recalibration chain)
+**https://github.com/humanswith-ai/contentos-benchmark**
 
-Until then, the methodology in `REPRODUCIBILITY.md` is sufficient for
-independent re-implementation. For early access, please open a Discussion
-on this dataset.
+The repo includes regression test suite (8 pinned baselines, 0.05s),
+streaming-CSV eval scripts (partial-tolerant), per-genre AUROC
+analyzer, and the calibration JSON shape for v1.11 production state.
 
-## Headline numbers (v1.11 production calibration)
+## Headline numbers (v1.11 production, 2026-04-29 measurement)
 
 | Metric | EN | RU |
 |---|---|---|
-| OOD AUROC (44-text smoke) | **0.821** | **0.837** |
+| OOD AUROC (176-sample expanded smoke) | **0.864** | **0.846** |
 | Wrong-rate | 4% | 9% |
 | p50 latency (EN ensemble) | **1.2 s** | — |
-| Adversarial AUROC (n=300, OOD) | **0.998** | — |
+| Adversarial AUROC (n=300, OOD-paired) | **0.998** | — |
+
+Earlier v1.0 paper reported 0.802 / 0.847 on the original 44-text
+smoke battery; the 4× expanded battery with class balance per
+(lang, genre) cell stabilized numbers upward. Per-genre details in
+the [companion repo](https://github.com/humanswith-ai/contentos-benchmark).
 
 ## Files