small note on evals

Author: SamSaffron

README.md

@@ -3,3 +3,26 @@
 **Plugin Summary**
 
 For more information, please see: https://meta.discourse.org/t/discourse-ai/259214?u=falco
+
+### Evals
+
+The directory `evals` contains AI evals for the Discourse AI plugin.
+
+To run them use: 
+
+cd evals
+./run --help
+
+```
+Usage: evals/run [options]
+    -e, --eval NAME                  Name of the evaluation to run
+        --list-models                List models
+    -m, --model NAME                 Model to evaluate (will eval all models if not specified)
+    -l, --list                       List evals
+```
+
+To run evals you will need to configure API keys in your environment:
+
+OPENAI_API_KEY=your_openai_api_key
+ANTHROPIC_API_KEY=your_anthropic_api_key
+GEMINI_API_KEY=your_gemini_api_key