LangChain Skills is a collection of agent skills for building software agents with LangChain, LangGraph, and Deep Agents. Coding agents that support the Agent Skills specification, including Claude Code, Cursor, and Windsurf, can install and use these skills. The catalogue lists the project's skills and its Claude Code plugin.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/langchain-ai/langchain-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/plugins/langchain-ai/langchain-skills/langchain-skills)<a href="https://agentmods.dev/plugins/langchain-ai/langchain-skills/langchain-skills"><img src="https://agentmods.dev/badge/plugins/langchain-ai/langchain-skills/langchain-skills/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/plugins/langchain-ai/langchain-skills/langchain-skills"><img src="https://agentmods.dev/badge/plugins/langchain-ai/langchain-skills/langchain-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
langchain-skills scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 22d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
{
"name": "langchain-skills",
"version": "0.1.2",
"description": "Agent skills for building agents with LangChain, LangGraph, and Deep Agents",
"author": {
"name": "LangChain",
"url": "https://langchain.com"
},
"repository": "https://github.com/langchain-ai/langchain-skills",
"license": "MIT",
"keywords": ["langchain", "langgraph", "deep-agents", "ai-agents", "rag"],
"skills": "./config/skills/"
}
What it installs
The manifest is a name and a version. 22 skills travel with it, and installing the plugin installs all of them — 1,172 tokens a session between them. Each is measured on its own page, and each can be installed alone.
- Skill managed-deep-agents A 121 tokens
- Skill eval-engineering A 67 tokens
- Skill langgraph-human-in-the-loop A 55 tokens
- Skill langgraph-persistence A 55 tokens
- Skill deep-agents-core A 36 tokens
- Skill deep-agents-orchestration A 43 tokens
- Skill langchain-dependencies A 70 tokens
- Skill langchain-fundamentals A 30 tokens
- Skill swarm A 32 tokens
- Skill deep-agents-memory A 46 tokens
- Skill langchain-middleware A 61 tokens
- Skill langgraph-cli A 48 tokens
- Skill langgraph-decision-models A 80 tokens
- Skill ecosystem-primer A 71 tokens
- Skill langgraph-fundamentals A 43 tokens
- Skill deepagents-python-quickstart A 48 tokens
- Skill deepagents-typescript-quickstart A 50 tokens
- Skill langgraph-python-quickstart A 40 tokens
- Skill langgraph-typescript-quickstart A 42 tokens
- Skill langchain-python-quickstart A 40 tokens
- Skill langchain-typescript-quickstart A 42 tokens
- Skill langchain-rag B 52 tokens
What ships with it
1 file beside plugin.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 22d ago Changed adc25bb2d23a
- 1mo ago First seen · 14 lines scan A 98265e649dda
langchain-skills is a plugin published in the GitHub repository langchain-ai/langchain-skills (1,313 stars, last pushed 4d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other plugins, from other repositories
humanizer
Rewrite AI-sounding text so it reads like the writer without changing what it says.
claude-plugins-official marketplace
Directory of popular Claude Code extensions including development tools, productivity plugins, and MCP integrations.
nextjs
Official Next.js skills: adopt and optimize Cache Components, adopt Partial Prefetching, and verify runtime behavior against a running dev server.
themes-example
themes-example. An open-source AI agent that brings the power of Gemini directly into your terminal.
knowledge-work-plugins marketplace
Plugin marketplace listing 123 plugins: noibu, productivity, enterprise-search, cowork-plugin-management, sales.
superpowers
Core skills library for Claude Code: TDD, debugging, collaboration patterns, and proven techniques.