What you need to know:OpenAI CEO Sam Altman kicked off DevDay in San Francisco saying it's been almost 2 years since its last developer event.The artificial intelligence company announced App SDK, AgentKit, ChatKit, Codex during the keynote.Altman will close the event with a chat with Jony Ive, as investors eagerly await any information on what the ex-Apple design chief is building.OpenAI just announced an AI chip agreement with AMD, the latest in a recent blitz of infrastructure deals that incl...