Quarkus LangChain4j agent reviews 2900-line PR for $0.45

The authors explain how they built an agentic pull request reviewer using Quarkus LangChain4j that successfully processes a large 2,900-line pull request for $0.45. The system combines a deterministic sequence backbone with specialized AI subagents, a decision router for selective model invocation, debate patterns for contested findings, score voting, and a report reflection loop. Open article →