langchain-typescript-quickstart

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): 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). Create a new directory (e.g. langchain-agent/ ) and do all work there — do not pollute the open project. Show more Installs 925 Repository langchain-ai/la…n-skills GitHub Stars 1.1K First Seen Jul 23, 2026 Security Audits Gen Agent Trust Hub Pass Socket Pass Snyk Warn