Medium Launches TK App Embedding AI Assistant in Writing Process

Medium on Monday launched TK, a new app that integrates artificial intelligence assistance directly into the writing editor to help users turn ideas into text. The tool allows writers to call the assistant by typing “@TK” and entering a prompt, positioning AI as a drafting companion that can look up facts, retrieve saved notes, generate writing prompts, and provide editorial or headline feedback. The name references the publishing placeholder “TK,” short for “to come,” and frames the assistant as a way to fill gaps in drafts. Medium said TK is intended to support writers at the earliest stages of composition by reducing interruptions from switching between tools and by helping organize prior ideas. The app also supports sharing early drafts for human feedback, and users can optionally connect external AI agents through an MCP server or Claude skill to incorporate personal project context. TK can import and export Markdown, offers access controls for work, and will not encrypt text by default because it is built for collaboration. It is initially available on the web, with a desktop app planned. The launch arrives as publishers and literary institutions continue to debate AI’s role in long-form writing. Medium acknowledged concerns that AI-generated assistance could blur authorship or encourage low-quality content, but said it views AI as a way to amplify human intelligence rather than replace it. To address transparency, TK lets authors publish notes explaining how AI was used, aiming to make the provenance of writing clearer in the AI era. TK is free for Medium users.