来源: a2a-registry/browse Agent Card: https://llm-orchestration-observability-agent.getvda.ai/.well-known/agent-card.json A2A: https://llm-orchestration-observability-agent.getvda.ai/a2a/ LLM Orchestration Observability Agent: composes langchain + langchain-community + langchain-core + langchain-openai + langsmith + openai — orchestration, observability, llm-client via A2A + MCP.