Agent skill

Langchain

by hoodini in hoodini/ai-agents-skills

Build LLM applications with LangChain and LangGraph. An agent skill from hoodini/ai-agents-skills.

No licenceAuto-check passedAI & LLM Engineering

Install Langchain

skills CLI
$ npx skills add hoodini/ai-agents-skills --skill langchain -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install hoodini/ai-agents-skills langchain --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/hoodini/ai-agents-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/langchain .claude/skills/langchain && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
langchain
GitHub stars
282
Token cost
~1.2k tokens
SKILL.md length
49 words
Files
1
Skills in repo
32
Repo updated
First seen
Licence
None found

At a glance

Build LLM applications with LangChain and LangGraph. An agent skill from hoodini/ai-agents-skills.

  • Creating RAG pipelines
  • SKILL.md covers Quick Start, LCEL (LangChain Expression…, RAG Pipeline and LangGraph Agent, plus 5 more sections
  • Calls pip; needs LANGCHAIN_API_KEY
  • Agent workflows

What it does

Langchain is an agent skill from hoodini/ai-agents-skills. Build LLM applications with LangChain and LangGraph. Use when creating RAG pipelines, agent workflows, chains, or complex LLM orchestration. Triggers on LangChain, LangGraph, LCEL, RAG, retrieval, agent chain.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in AI & LLM Engineering, covering Building AI agents. It works with LangChain and LangGraph. The repository describes itself as: 🧠 AI Agent Skills Repository - A curated collection of specialized skills for AI coding agents (Claude Code, GitHub Copilot, Cursor, Windsurf). Created by Yuval Avidani using…

When your agent uses it

  • Creating RAG pipelines
  • Agent workflows
  • Complex LLM orchestration

Example prompts

  • “/langchain”

Requirements

  • Python 3
  • A credential in LANGCHAIN_API_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit f7a43d8. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • pip

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • smith.langchain.com
    • python.langchain.com
    • langchain-ai.github.io
    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • LANGCHAIN_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Langchain loads about 1.2k tokens when it runs. Until then it costs about 55 tokens; SKILL.md has 49 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~55
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 49 words (~1,227 tokens).

“Build sophisticated LLM applications with composable chains and agent graphs.”

— opening of SKILL.md by hoodini
name
langchain

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/langchain of hoodini/ai-agents-skills.

Open the folder on GitHubat commit f7a43d8

Compare with similar skills

Langchain next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Langchain compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Langchain this skillhoodini/ai-agents-skills282—~1.2kAutomated safety check: PassNone
Mem0 Platform SDKmem0ai/mem067k1 repos~2.2kAutomated safety check: PassApache-2.0
LangSmith Trace DebuggingComposioHQ/awesome-claude-skills77k8 repos~2.7kAutomated safety check: PassNone
Add Example AgentGetBindu/Bindu10k—~1.1kAutomated safety check: NotesCustom licence
Failproof AI SDK IntegrationFailproofAI/failproofai5.3k—~6kAutomated safety check: PassCustom licence
Edgeone Makers MigrationTencentEdgeOne/edgeone-makers-tools1.9k1 repos~4.1kAutomated safety check: PassMIT

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Questions about Langchain

What does Langchain do?

Build LLM applications with LangChain and LangGraph. An agent skill from hoodini/ai-agents-skills. Langchain is an agent skill from hoodini/ai-agents-skills. Build LLM applications with LangChain and LangGraph.

When should I use Langchain?

Langchain fits situations like: creating RAG pipelines; agent workflows; complex LLM orchestration.

How do I install Langchain in Claude Code?

Run `npx skills add hoodini/ai-agents-skills --skill langchain -a claude-code`. Or copy the skill folder (skills/langchain in hoodini/ai-agents-skills) into .claude/skills/langchain in your project. Claude Code loads it when a task matches its description.

How do I install Langchain in Codex?

Run `npx skills add hoodini/ai-agents-skills --skill langchain -a codex`. Or copy the skill folder (skills/langchain in hoodini/ai-agents-skills) into .agents/skills/langchain in your project. Codex loads it when a task matches its description.

Can I use Langchain in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hoodini/ai-agents-skills --skill langchain -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/langchain, .gemini/skills/langchain, .github/skills/langchain and .opencode/skills/langchain in your project.

What does Langchain need to run?

Going by SKILL.md and its folder, Langchain needs the command-line tools its instructions call (pip) and credentials named LANGCHAIN_API_KEY. Our summary lists: Python 3; A credential in LANGCHAIN_API_KEY.

Does Langchain access the network?

SKILL.md names 4 domains. As links in the text: smith.langchain.com, python.langchain.com, langchain-ai.github.io and github.com. This is read from the text; nothing was executed.

Is Langchain safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Langchain use?

No licence was found for Langchain or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Langchain use?

About 1.2k tokens (SKILL.md is roughly 4.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Langchain?

Skills that share tags, products or a category with Langchain: Mem0 Platform SDK (mem0ai/mem0, 67k stars), LangSmith Trace Debugging (ComposioHQ/awesome-claude-skills, 77k stars), Add Example Agent (GetBindu/Bindu, 10k stars) and Failproof AI SDK Integration (FailproofAI/failproofai, 5.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Langchain?

hoodini (a GitHub user) maintains it in hoodini/ai-agents-skills, which has 282 GitHub stars. The repository holds 32 skills in this directory. The repository was last updated on July 11, 2026.

Source: hoodini/ai-agents-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.