langchain-fundamentals
Core patterns for building LangChain agents with tool calling, state persistence, and human-in-the-loop workflows.
Install
npx skills add https://github.com/langchain-ai/langchain-skills --skill langchain-fundamentalsStats
| Total installs | 2,717 |
| Weekly installs | 2.7K |
| GitHub stars | 438 |
| First seen | Feb 21, 2026 |
| Source | @langchain-ai/langchain-skills |
Summary
- Use create_agent() with model, tools list, and system prompt; configure state persistence with checkpointer and thread_id for conversation memory across invocations
- Define tools via @tool decorator (Python) or tool() function (TypeScript) with clear descriptions so agents know when to call them
- Add middleware like HumanInTheLoopMiddleware for approval workflows, custom error handling, and human-in-the-loop control over agent decisions
- Set recursion_limit in invoke config to prevent infinite loops, and access results via result["messages"][-1].content rather than direct content access
Tags
Related skills
| Skill | Installs | vs langchain-fundamentals |
|---|---|---|
| deep-agents-core | 2,534 | -183 |
| deep-agents-orchestration | 2,587 | -130 |
| tushare | 2,879 | +162 |
| parallel-debugging | 2,558 | -159 |
| team-communication-protocols | 2,498 | -219 |
FAQ
- How many installs does langchain-fundamentals have?
- langchain-fundamentals has 2,717 total installs and 2.7K installs this week.
- Where is langchain-fundamentals hosted?
- langchain-fundamentals is published by @langchain-ai/langchain-skills at https://github.com/langchain-ai/langchain-skills.
- How many GitHub stars does langchain-fundamentals have?
- langchain-fundamentals has 438 GitHub stars.
- When was langchain-fundamentals first indexed?
- OrangeBot.AI first indexed langchain-fundamentals on Feb 21, 2026.
- How do I install langchain-fundamentals?
- Run: npx skills add https://github.com/langchain-ai/langchain-skills --skill langchain-fundamentals