Medium launches TK, a writing app with a built-in AI assistant

Medium launched TK, a web writing app with an AI assistant built into its editor, according to TechCrunch. Users can enter @TK followed by a request to ask questions, retrieve saved writing or get feedback on drafts and headlines.

TK can suggest writing prompts and check drafts against style guides for Medium publications. Users can also connect their own AI agent through TK's MCP server or Claude skill, while a social feature lets writers share early drafts and collect feedback.

Authors can publish notes explaining how AI contributed to their work. TK supports Markdown imports and exports, access permissions and collaborative editing, but it does not encrypt writing. Medium also plans to release a desktop app.