SKILL.md
┌─────────────────────────────────────────┐
│ Deep Agents │ ← highest level: batteries included
│ (planning, memory, skills, files) │
├─────────────────────────────────────────┤
│ LangGraph │ ← orchestration: graphs, loops, state
│ (nodes, edges, state, persistence) │
├─────────────────────────────────────────┤
│ LangChain │ ← foundation: models, tools, chains
│ (models, tools, prompts, RAG) │
└─────────────────────────────────────────┘
Picking a higher layer does not cut you off from lower layers — you can use LangGraph graphs inside Deep Agents, and LangChain primitives inside both.