OpenAI Agents SDK: Lightweight Python Framework for Multi-Agent Orchestration
Overview
The OpenAI Agents SDK is a Python-first framework designed to simplify the orchestration of multi-agent systems. Unlike monolithic agent architectures, it focuses on composability through distinct primitives: Agents (LLMs with instructions and tools), Handoffs (mechanisms for delegating tasks between agents), Guardrails (input/output validation), and Tracing (observability). It supports both the OpenAI Responses API and Chat Completions API, as well as non-OpenAI models via LiteLLM integration. The SDK automates the “agent loop”—managing tool calls and execution—while allowing developers to define workflows using standard Python code rather than complex new abstractions.
Architecture
The architecture centers on the Runner, which executes an Agent Loop. The flow begins with a User input processed by a Triage Agent. If the task exceeds the agent’s scope, a Handoff is triggered, transferring context to a Specialist Agent. All interactions are wrapped in Guardrails for safety and logged via Tracing. Tools are executed locally or via API, with results fed back into the loop until a final response is generated.
