LangChain4j 1.18 — Builders · Domain · Observability

Map AgenticServices builders, AgenticScope domain state, and AgentListener/AgentMonitor observability in LangChain4j 1.18 — with the official styled-writer sample.

Builders · Agenticservices

Leaf role → agentBuilder(Class)

Domain · Scope

AgenticScope = shared whiteboard

Observability

AgentListener on any builder

Litmus · Which Surface?

One role · tools · memory → AiServices