OpenAI Agents SDK

OpenAI's lightweight, open-source (MIT) framework for multi-agent workflows. Provides agents with instructions, tools, guardrails, and handoffs; sandboxed long-running agents, realtime voice pipelines, agents-as-tools, human-in-the-loop, and built-in tracing. Provider-agnostic beyond OpenAI — supports the Responses and Chat Completions APIs plus 100+ other LLMs.