Medium launches TK, an AI writing app with provenance notes

Medium is positioning TK as an answer to a debate that has already cost some authors book deals and drawn scrutiny to literary awards: how much AI help is too much. The app does not try to police that line through detection. Instead, Medium concedes that AI raises the possibility of low-quality content and blurred authorship, and offers authors a way to publish notes that explain how AI was used. That approach treats provenance, rather than prohibition, as the publishable standard.

The design also reflects Medium’s stated view that “artificial intelligence makes writing more important, not less.” TK keeps the writer in the editor but adds skills for editorial feedback, headline feedback, and matching a draft to a publication’s style guide. It can also recall bits of writing saved earlier, which fits Medium’s description of the app as a place to turn ideas into words rather than a blank page.

Practical choices round out the launch. TK imports and exports Markdown but is not a Markdown app, and its writing is not encrypted because the app is built for collaboration, though users can set access control permissions. A social layer lets writers share early drafts for feedback, and the optional connection to a personal AI agent through TK’s MCP server or Claude skill suggests Medium expects some writers to bring their own context to the tool.