diff --git a/README.md b/README.md
index ce23fcc..e829bc1 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,12 @@ A repository merge does not make a recipe executable in the hosted Brida API. Qu
 
 The open-source TypeScript SDK lives at [`brida-ai/sdk`](https://github.com/brida-ai/sdk). The registry and SDK are Apache-2.0; the hosted Brida Reflex service remains a separately operated product.
 
+## Evaluation with ReflexBench
+
+[ReflexBench](https://github.com/brida-ai/reflexbench) is Brida's open, provider-neutral benchmark and reproducible evaluation harness for System One models and typed decision engines. It evaluates Binary/Noul, Choice and Score quality, calibration, multilingual consistency, option-order robustness, cardinality/capability and same-response workflow-policy value without collapsing them into one global score.
+
+Benchmark v1 is frozen for reproducibility; new engine/checkpoint results can be added against the unchanged protocol.
+
 ## Validate the registry
 
 ```bash