Adding runtime budget control to a Spring Boot AI agent

We recently wired budget checks into a Java/Spring Boot agent platform. The problem was not that the platform had no limits. It had too many: subscription checks, credit checks, feature limits, and OpenAI calls all had their own logic. The expensive path was simple: calling OpenAI. So we wrapped that path directly. @Service public class CyclesOpenAIService { private final SimpleOpenAI openAI ; public CyclesOpenAIService ( OpenAIClientProvider clientProvider ) { this . openAI = clientProvider . g