A screenshot of the Muse agent in action. Image: MetaMeta on Tuesday announced Muse, a personal AI agent built on the latest generation of models developed under chief AI officer Alexandr Wang.Why it matters: The product, long in development, was touted as a key next step by CEO Mark Zuckerberg in his recent 6,500-word manifesto.Driving the news: Muse, as the agent is known, exists in a chat interface, similar to a text thread.It's designed to be more proactive and long-running than typical chat...