OpenAI isn’t only coming after productivity software with ChatGPT’s new Pages, Slides and Space features — the AI lab is now targeting any application that could work better when integrated with ChatGPT. At the company’s Dev Day presentation on Tuesday, the AI company said it is now allowing developers to build their own app-like experiences within ChatGPT using plugin extensions. OpenAI already supports plugins, which connect ChatGPT to everyday tools like Slack, SharePoint, Airtable and Google...