The AI world has recently changed a lot, with chatbots talking to us, AI writing code, and tools like GPT, Claude, etc. becoming part of our daily work. But many developers want to go beyond just text creation to build agents. AI systems that can act, use tools, make choices, and work together to fix problems. To help with this, OpenAI released the Agent SDK, a toolkit that makes it easier to build agents that can follow directions, use outside tools, and team up with other agents when needed.