nats: servers: ["nats://nats:4222"] invocation_subject: "router.invoke.agent" services: messaging: "http://messaging-service:7004" agent_memory: "http://agent-memory:7008" llm_proxy: "http://llm-proxy:7007" agents: "http://agents-service:7009" llm: default_model: "gpt-4" max_tokens: 1000 temperature: 0.7 timeout: 30 memory: query_top_k: 5 enable_writeback: true