Building an AI Shirt Agent with Java and Spring AI: Tools, ChatClient, and REST

This story is from 2026-10-21. It is preserved in the archive; the latest stories are on the live feed.

Introduction Large language models are good at understanding requests, but they do not know your inventory, your prices, or your business rules. The usual answer is to give the model tools : ordinary Java methods it can call when it needs information. The model decides when to call a tool, your cod…