LangFn (TypeScript)

Comprehensive AI Development SDK for LLM-based workflows.

Features

- Model Abstraction: Unified interface for OpenAI, Anthropic, Ollama, and more.
- Orchestration: Sequential, Parallel, and Map-Reduce chains.
- Graph Workflows: Stateful workflows with StateGraph.
- Agents: Functional ToolAgent and ReActAgent.
- Structured Output: Type-safe output parsing with Zod.
- RAG: Embeddings and Vector Store support.
- Observability: Built-in tracing.

Usage

``typescript
import { langfn, models } from "langfn";

const lang = langfn({
model: new models.OpenAIChatModel({
apiKey: process.env.OPENAI_API_KEY
})
});

const response = await lang.complete("Hello world");
console.log(response.content);
``

Documentation

See the main documentation for more details.