| name | langchain-stack |
| description | Router for LangChain, LangGraph, and Deep Agents skills. Load this ONCE — it tells you which sub-skill file to read for the specific task. |
| triggers | ["langchain","langgraph","deep agents","agent framework","create agent","state graph"] |
LangChain / LangGraph / Deep Agents — Skill Router
Do NOT load all sub-skills. Read ONLY the file(s) relevant to the current task.
Step 1: Pick framework
If unsure which framework to use, read framework-selection first:
→ ~/.skills-library/langchain/framework-selection/SKILL.md (163 lines)
Step 2: Load the relevant sub-skill(s)
LangChain (simple agents, tool calling)
| When | Read |
|---|
| Creating agents, defining tools, basic agent loop | ~/.skills-library/langchain/langchain-fundamentals/SKILL.md (394 lines) |
| Human-in-the-loop approval, custom middleware, structured output | ~/.skills-library/langchain/langchain-middleware/SKILL.md (388 lines) |
| RAG: document loaders, splitters, embeddings, vector stores | ~/.skills-library/langchain/langchain-rag/SKILL.md (517 lines) |
| Package versions, installation, dependency management | ~/.skills-library/langchain/langchain-dependencies/SKILL.md (419 lines) |
LangGraph (stateful graphs, complex workflows)
| When | Read |
|---|
| StateGraph, nodes, edges, Command, Send, streaming | ~/.skills-library/langchain/langgraph-fundamentals/SKILL.md (811 lines) |
| interrupt(), approval workflows, error handling tiers | ~/.skills-library/langchain/langgraph-human-in-the-loop/SKILL.md (532 lines) |
| Checkpointers, thread_id, time travel, Store, subgraph persistence | ~/.skills-library/langchain/langgraph-persistence/SKILL.md (560 lines) |
Deep Agents (hierarchical agent systems)
| When | Read |
|---|
| create_deep_agent(), harness architecture, SKILL.md format | ~/.skills-library/langchain/deep-agents-core/SKILL.md (423 lines) |
| SubAgentMiddleware, TodoList planning, HITL interrupts | ~/.skills-library/langchain/deep-agents-orchestration/SKILL.md (471 lines) |
| StateBackend, StoreBackend, FilesystemMiddleware, CompositeBackend | ~/.skills-library/langchain/deep-agents-memory/SKILL.md (301 lines) |
~/.skills-library/langchain is a symlink to the langchain-skills submodule — don't hardcode the submodule path, use this alias so the skill stays portable if the submodule moves.
Rules
- Read the sub-skill file with the Read tool — it contains full API reference and examples
- For multi-concern tasks, read multiple files (e.g. langgraph-fundamentals + langgraph-persistence)
- Never guess APIs from memory — always read the file first
