Add reference to Working with AI / Agent Skill

Author: freyfogle

README.md

@@ -17,6 +17,11 @@ The legacy stable version (2.2.2) remains available on Maven Central, and this [
 
 You can find a comprehensive tutorial for using this package [on the OpenCage site](https://opencagedata.com/tutorials/geocode-in-java).
 
+## Working with AI / Agent Skill
+
+There is an [Agent Skill for working with the OpenCage Geocoding API](https://github.com/OpenCageData/opencage-skills/blob/master/opencage-geocoding-api/SKILL.md) which includes a reference file for developing in Java using this package.
+
+
 ## Getting started
 
 Sign up for a [free-trial API Key](https://opencagedata.com/users/sign_up).