Agent skill · LangChain
Deep Agents skill for Claude Code, Codex and Cursor
Officialname: deep-agents-core★ 1.3k (repo)pushed 2026-10-21MITSKILL.md on GitHubchecked 2026-11-07
What it does, in the publisher's words
INVOKE THIS SKILL when building ANY Deep Agents application. Covers create_deep_agent(), harness architecture, SKILL.md format, and configuration options.
The description field of the SKILL.md. The agent reads only this at startup and decides from it when to load the full skill.
Install Deep Agents
The skills CLI copies the skill into the folder of each agent you pick (Claude Code, Codex, Cursor, Copilot, Gemini CLI, OpenCode, Windsurf...). Add -g for all projects. Needs Node.js 22.20+. docs
npx skills add langchain-ai/langchain-skills --skill deep-agents-core
This repo is a plugin marketplace. Inside Claude Code, add it and install the plugin that holds the skill (langchain-skills), or copy only this skill into ~/.claude/skills. docs
/plugin marketplace add langchain-ai/langchain-skills /plugin install <plugin>@langchain-skills # or only this skill: npx skills add langchain-ai/langchain-skills --skill deep-agents-core -a claude-code
Download the skill folder, zip it, then Customize > Skills > + > Create skill > Upload a skill. Code execution must be on (Settings > Capabilities). docs
git clone --depth 1 https://github.com/langchain-ai/langchain-skills.git /tmp/deep-agents-core-src cp -r /tmp/deep-agents-core-src/config/skills/deep-agents-core ./deep-agents-core zip -r deep-agents-core.zip deep-agents-core
Codex reads skills from .agents/skills in the repo or ~/.agents/skills. Type $ in Codex to use one. docs
npx skills add langchain-ai/langchain-skills --skill deep-agents-core -a codex
gh skill (GitHub CLI 2.90+, preview) installs it for Copilot in VS Code, the CLI and the cloud agent. Copilot also reads .github/skills and ~/.copilot/skills. docs
gh skill install langchain-ai/langchain-skills deep-agents-core
Cursor reads .cursor/skills, .agents/skills and ~/.cursor/skills (and .claude/skills). It does not install loose skills from a GitHub URL, so copy it in. docs
npx skills add langchain-ai/langchain-skills --skill deep-agents-core -a cursor
Installs from the GitHub repo; --path picks this skill out of the repo. Default scope is user (all projects). docs
gemini skills install https://github.com/langchain-ai/langchain-skills.git --path config/skills/deep-agents-core
OpenCode reads .opencode/skills, ~/.config/opencode/skills and the Claude and .agents folders. docs
npx skills add langchain-ai/langchain-skills --skill deep-agents-core -a opencode
Windsurf (now Devin Desktop) reads .devin/skills, .windsurf/skills and ~/.codeium/windsurf/skills. docs
npx skills add langchain-ai/langchain-skills --skill deep-agents-core -a windsurf
Works with
Claude Code, Claude.ai and Claude Desktop, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode, Windsurf and other agents that read the open Agent Skills format.
What's in the SKILL.md
- SKILL.md Format
- Directory Structure
- SKILL.md Format
- What Agents CAN Configure
- What Agents CANNOT Configure
Facts
- Skill name
- deep-agents-core
- Publisher
- LangChain (official)
- Repo
- langchain-ai/langchain-skills
- License
- MIT
- SKILL.md size
- 592 words, 439 lines
- Repo stars
- 1.3k (as of 2026-10-24)
- SKILL.md checked
- 2026-11-07
Pairs with the LangChain MCP server: the server gives the agent the tools, the skill teaches it how to use them.
More skills from langchain-ai/langchain-skills
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FAQ
What does the deep-agents-core skill do?+
Builds agents with LangChain's Deep Agents harness and its configuration options. In its own SKILL.md, LangChain describes it as: "INVOKE THIS SKILL when building ANY Deep Agents application. Covers create_deep_agent(), harness architecture, SKILL.md format, and configuration options."
How do I install the deep-agents-core skill?+
Run npx skills add langchain-ai/langchain-skills --skill deep-agents-core and pick your agents, or use the tab for your agent above. In Claude Code the skill ends up in ~/.claude/skills/deep-agents-core/SKILL.md; in Codex and Cursor in .agents/skills/deep-agents-core/.
Does Deep Agents work in Codex, Cursor and Copilot, or only Claude?+
It's a standard SKILL.md, so any agent that reads the Agent Skills format can use it: Claude Code, the Claude apps, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode, Windsurf and more.
Who maintains Deep Agents?+
LangChain, the company or project behind it, in the langchain-ai/langchain-skills repo on GitHub, last pushed 2026-10-21. License: MIT.
Read a skill's SKILL.md and scripts before you install it: skills aren't verified by any agent vendor. Claude skills marketplace · How to install skills · MCP servers