Overview
- The app, launched Monday, is a free tool for Medium account holders and is available on the web, Android, and iOS with a native desktop app planned.
- TK embeds an in-editor AI assistant summoned by typing TK or @TK to generate text, give editorial feedback, suggest headlines, and surface related notes.
- Users can collect and share drafts inside invitation-only “Libraries,” which Medium describes as private blogging spaces for collaboration without public pageview metrics.
- TK includes author-facing provenance tools that let writers disclose AI prompts and source material, and it can optionally connect to external agent memories via TK’s MCP server or a Claude integration.
- Medium frames TK as a strategic shift from public, ad-driven distribution toward community-controlled content as search referrals and AI scraping reduced traffic after the platform moved to subscriptions in 2017.