学习路线
Level 1：先看懂 Agent 在干什么
Agent → Agent Loop → Planning → Action / Observation → Stop Condition
Level 2：看懂 Agent 为什么能真的做事
Harness → Runtime → Tool Calling → Sandbox → State
Level 3：看懂 Agent 为什么能持续工作
Context Engineering → Memory → RAG → Tracing → Evals
Level 4：看懂多个 Agent 如何协作
Sub-agent → Handoff → Orchestrator
Level 5：进入 Agent Engineering
Harness Engineering → Loop Engineering → Coding Agent Skills