Show GN: Spanlens - LLM 호출과 에이전트 trace를 한 곳에서 보는 오픈소스 관측 플랫폼

Spanlens fills a crucial gap in LLM application development by unifying cost tracking, latency analysis, and agent debugging in a single platform. Its proxy-based zero-code integration across OpenAI, Anthropic, and Gemini SDKs, combined with LangGraph topology visualization and automatic critical path detection, transforms raw logs into actionable debugging insights. As multi-agent systems become more complex, this unified observability approach enables developers to optimize both performance and costs across distributed traces.