agent harness — The scaffolding around a model that turns it into a working agent — the loop, the tools it can call, and the rules for when to stop.
MCP — The Model Context Protocol — an open standard that lets any AI assistant plug into any tool or data source without custom integration code.
multi-agent — Using several AI agents on one problem — splitting work in parallel, checking each other, or filling different roles like planner and reviewer.
sandbox — An isolated environment where AI-generated code or agent actions run without being able to touch anything real.
Why it matters
A dedicated Agents API changes how developers build production agents on OpenAI's platform: durable sessions, sandboxAn isolated environment where AI-generated code or agent actions run without being able to touch anything real.Full definition →, and orchestration are now first-class API primitives instead of custom infrastructure.
