Mimzie is a free desktop app that provides a GUI for managing knowledge work agents from multiple vendors, including ChatGPT, Claude, Gemini, and Grok. It allows users to run these agents in their native CLI harnesses, eliminating the need for agent-specific interfaces. Mimzie is designed to be agent-neutral, meaning users can utilize any AI plan or combination of plans without incurring additional subscription fees. Key features include local file editing with cloud syncing, reviewable changes, and integration with bots from various AI agents.