https://letters.newtype.pro/p/building-an-agent-architecture-is-not-stacking-skillsnewtypeen2026-07-26T04:18:17+00:00Agent架构搭建 ≠ 堆Skillshttps://letters.newtype.pro/p/openrouter-two-layer-routing-systemnewtypeen2026-07-25T09:49:26+00:00OpenRouter的两层路由体系