Claude Agent SDK
Anthropic's Python SDK for building production agent systems. Tool use, guardrails, agent handoffs, and orchestration. Released alongside Claude 4.
The Claude Agent SDK provides building blocks for production agent systems in Python. It handles tool registration (define tools as Python functions, the SDK auto-generates schemas), guardrails (input/output validation), agent-to-agent handoffs (specialist agents that delegate), and multi-turn orchestration. It's designed to work with Claude's native tool use - no wrapper layers or prompt hacking. Released alongside Claude 4, it competes with OpenAI's Agents SDK and LangChain. I use it when building Python-based agents that need reliability and structured workflows.
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Get started with Claude Agent SDK
Anthropic's Python SDK for building production agent systems. Tool use, guardrails, agent handoffs, and orchestration. Released alongside Claude 4.
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Vercel AI SDK
The TypeScript toolkit for building AI apps. Unified API across OpenAI, Anthropic, Google. Streaming, tool calling, structured output, multi-step agents. 50K+ GitHub stars.
LangChain / LangGraph
Most popular LLM framework. 100K+ GitHub stars. Chains, RAG, vector stores, tool use. LangGraph adds stateful multi-agent workflows with cycles and persistence.
Composio
Gives AI agents access to 250+ external tools (GitHub, Slack, Gmail, databases) with managed OAuth. Handles the auth and API complexity so your agent doesn't have to.
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