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Official agent skill

Langchain Typescript Quickstart

by langchain-ai in langchain-ai/langchain-skills

Scaffold a minimal local LangChain agent in TypeScript by following the official quickstart.

OfficialMITAuto-check: notesAI & LLM Engineering

Install Langchain Typescript Quickstart

skills CLI
$ npx skills add langchain-ai/langchain-skills --skill langchain-typescript-quickstart -a claude-code

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

GitHub CLI
$ gh skill install langchain-ai/langchain-skills langchain-typescript-quickstart --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/langchain-ai/langchain-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/config/skills/langchain-typescript-quickstart .claude/skills/langchain-typescript-quickstart && 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-typescript-quickstart
GitHub stars
1.3k
Token cost
~377 tokens
SKILL.md length
167 words
Files
1
Skills in repo
22
Repo updated
First seen
Licence
MIT

At a glance

Scaffold a minimal local LangChain agent in TypeScript by following the official quickstart.

  • Works in 5 steps: Ask which provider/model to use.… → Create a new directory (e.g.… → Only secret: the provider API key in… → …
  • The user wants to quickly build
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Try a LangChain agent locally

What it does

Langchain Typescript Quickstart is an agent skill from langchain-ai/langchain-skills, published by the product's own GitHub organization. Scaffold a minimal local LangChain agent in TypeScript by following the official quickstart. Use when the user wants to quickly build or try a LangChain agent locally.

Its SKILL.md is about 380 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, TypeScript and LangSmith. The licence is MIT.

When your agent uses it

  • The user wants to quickly build
  • Try a LangChain agent locally

Example prompts

  • “/langchain-typescript-quickstart”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Ask which provider/model to use. Showcase that LangChain is model-agnostic. Suggested prompt
  2. Create a new directory (e.g. langchain-agent/) and do all work there — do not pollute the open project.
  3. Only secret: the provider API key in .env (gitignored). No LangSmith / Tavily unless they ask. Prefer they edit .env themselves — don't…
  4. Install the provider package needed for their model if the quickstart's base install isn't enough.
  5. Run the example, show output, then stop. Point to langchain-fundamentals for next steps.

What it can do on your machine

Read from SKILL.md and the folder at commit 16a992f. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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):

    • docs.langchain.com

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

  • Credentials

    Names no API keys, tokens, secrets or passwords.

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

Context cost

Langchain Typescript Quickstart loads about 377 tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 167 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~50
When it runs · the whole SKILL.md, loaded when a task matches
~377

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NoteMentions a .env fileSKILL.md:26
    3. Only secret: the provider API key in `.env` (gitignored). No LangSmith / Tavily unless they ask. Prefer they edit `.e

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

The full file from langchain-ai/langchain-skills at commit 16a992f, republished under its MIT licence (© langchain-ai). 167 words, ~377 tokens.

Download SKILL.mdSave it as .claude/skills/langchain-typescript-quickstart/SKILL.md (or your agent's skills folder).
name
langchain-typescript-quickstart
description
Scaffold a minimal local LangChain agent in TypeScript by following the official quickstart. Use when the user wants to quickly build or try a LangChain agent locally.

LangChain TypeScript quickstart

Follow the live docs — do not invent an alternate API from memory:

https://docs.langchain.com/oss/javascript/langchain/quickstart

Fetch that page (Docs MCP or HTTP) and implement what it shows (weather agent + createAgent). Requires Node 22+.

Local setup constraints

Apply these on top of the quickstart (they keep setup minimal and model-agnostic):

  1. Ask which provider/model to use. Showcase that LangChain is model-agnostic. Suggested prompt:

    Which model should this agent use? Pass a provider:model string — e.g. openai:gpt-5.5, anthropic:claude-sonnet-5, google-genai:gemini-2.5-flash-lite. Default if you're unsure: anthropic:claude-sonnet-5.

    Swap the quickstart's model string for their choice (or the default).

  2. Create a new directory (e.g. langchain-agent/) and do all work there — do not pollute the open project.

  3. Only secret: the provider API key in .env (gitignored). No LangSmith / Tavily unless they ask. Prefer they edit .env themselves — don't paste keys into chat.

  4. Install the provider package needed for their model if the quickstart's base install isn't enough.

  5. Run the example, show output, then stop. Point to langchain-fundamentals for next steps.

© langchain-ai, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in config/skills/langchain-typescript-quickstart of langchain-ai/langchain-skills.

Open the folder on GitHubat commit 16a992f

Compare with similar skills

Langchain Typescript Quickstart 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 Typescript Quickstart compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Langchain Typescript Quickstart this skilllangchain-ai/langchain-skills1.3k—~377Automated safety check: NotesMIT
Add Docs Pagelangchain-ai/docs426—~2kAutomated safety check: PassMIT
Docs Code Sampleslangchain-ai/docs426—~4.6kAutomated safety check: PassMIT
Langgraph Testing Evaluationsoba-labs/langchain-agent-skills107—~2.3kAutomated safety check: PassMIT
LangSmith Trace DebuggingComposioHQ/awesome-claude-skills77k8 repos~2.7kAutomated safety check: PassNone
Add Example AgentGetBindu/Bindu10k—~1.1kAutomated safety check: NotesCustom licence

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Works with

Categories

Questions about Langchain Typescript Quickstart

What does Langchain Typescript Quickstart do?

Scaffold a minimal local LangChain agent in TypeScript by following the official quickstart. Langchain Typescript Quickstart is an agent skill from langchain-ai/langchain-skills, published by the product's own GitHub organization. Scaffold a minimal local LangChain agent in TypeScript by following the official quickstart.

When should I use Langchain Typescript Quickstart?

Langchain Typescript Quickstart fits situations like: the user wants to quickly build; try a LangChain agent locally.

How do I install Langchain Typescript Quickstart in Claude Code?

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

How do I install Langchain Typescript Quickstart in Codex?

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

Can I use Langchain Typescript Quickstart 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 langchain-ai/langchain-skills --skill langchain-typescript-quickstart -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-typescript-quickstart, .gemini/skills/langchain-typescript-quickstart, .github/skills/langchain-typescript-quickstart and .opencode/skills/langchain-typescript-quickstart in your project.

What does Langchain Typescript Quickstart need to run?

SKILL.md names no scripts, command-line tools or credentials: Langchain Typescript Quickstart is instructions for the agent only.

Does Langchain Typescript Quickstart access the network?

SKILL.md names 1 domain. As links in the text: docs.langchain.com. This is read from the text; nothing was executed.

Is Langchain Typescript Quickstart safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Langchain Typescript Quickstart use?

Langchain Typescript Quickstart is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Langchain Typescript Quickstart use?

About 377 tokens (SKILL.md is roughly 1.5k 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 Typescript Quickstart?

Skills that share tags, products or a category with Langchain Typescript Quickstart: Add Docs Page (langchain-ai/docs, 426 stars), Docs Code Samples (langchain-ai/docs, 426 stars), Langgraph Testing Evaluation (soba-labs/langchain-agent-skills, 107 stars) and LangSmith Trace Debugging (ComposioHQ/awesome-claude-skills, 77k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Langchain Typescript Quickstart?

langchain-ai (a GitHub organization, an official publisher) maintains it in langchain-ai/langchain-skills, which has 1,274 GitHub stars. The repository holds 22 skills in this directory. The repository was last updated on October 8, 2026.

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