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TK by Medium
Launched this week
What if every thought had the chance to become something extraordinary? Meet TK, the agentic notebook by Medium. Capture every spark, from shower thoughts to forgotten notes. With AI right where you write, connect the dots, surface new possibilities, and compound what you know without breaking your flow. Then turn your thinking into writing that’s unmistakably yours. With built-in community and an MCP server that connects to your favorite LLMs and AI tools.
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The first writing app that makes me consider dropping Ulysses after many years. That says something. I'm the loyal type, so jumping ship and adopting TK is a big deal for me. TK works much better than any current writing app if you're someone who has fleeting thoughts that you sometimes want to turn into an article, a book, share with a group of people or just work that writing muscle by developing a habit. And the fact that I can have an AI assistant do research for me right there in the app WHILE I keep writing... that's pretty special.
Congrats Tony and team! "Every word you write works on your behalf" is a lovely way to put it. As someone who keeps notes as plain Markdown files, I'm curious: can I get my TK notebooks out as Markdown or plain text, so the thinking stays portable outside Medium?
@mr_pft yes! We have a full export feature for all your data. You can also copy individual notes as markdown.
@moishe_lettvin That's great to hear, thanks Moishe! Copying single notes as Markdown is exactly what I'd use day to day. Good luck with the launch!
I've found TK a perfect app to order my study in mathematics and physics. Thank you Tony for the excellent work
Thanks for exploring, @juliogutierrez !
I've used TK for a couple of months. I find it easy and enjoyable to use. It also has the makings of a great writers' group because it's so easy to communicate with fellow writers.
Thanks for sharing your experience,@susan_barrett_price ! TK was made for writers to connect and collaborate.
my obsidian vault is all chinese, does the agent actually work on chinese notes or is it english-only in practice?
@archercode this is a great question. I believe it will mostly work, with some caveats. We do have some users using the product in Spanish, and the LLM models we're using work well with Chinese, so it has potential to work. I looked (well, okay, I had Claude look) through the code and look for potential problems and the biggest thing it found is that our vector search uses English as the setting, so keyword search might not work very well -- that's searching for a note in the product directly, but also searches the agent does on your behalf. But the assistant should be pretty good at interacting with the note you're editing and queries like "recent notes" or "notes that have been shared with me." If you try it, let me know (you can always tag me in TK itself!); I'm curious what you find.
Also worth saying: I did some shallow investigation of making our vector search work with Chinese and it's unfortunately nontrivial (if it was trivial I'd have just fixed it and said so in this response!) But if we get a critical mass of users saving their notes in Chinese I'll prioritize it; it's not impossible by any means.
@archercode just a quick follow-up on the below: I did some tests (these were imperfect, because I don't speak Chinese, so I was relying on Claude to create Chinese text and search in it) and the existing vector search seems pretty good right now -- not perfect, but not terrible. I'm gonna add some observability to see how frequently we're getting Chinese search queries, and some data about how successful they are, and then might do some deeper fixes. Thanks for asking this! And, again, feel free to let me know if you do end up using TK with your Chinese notes and how it works for you.
I'm the Community Manager on the TK team. I've written extensively in TK for personal and professional projects. One of my favorite things about TK is how simple it makes writing. The app has helped me piece together my thinking, accelerate my writing process, and more importantly, share my work with the right people.
The AI assistant and skills help me discover hidden themes in my writing, turn my work into outlines, memos, and other work that can live beyond TK. And Libraries are the home where I can share my work with people I trust and get feedback that unlocks new ideas. It's been a really fun experience developing the Community behind the product, and I'm excited to see how you use TK, and what it helps you uncover.
mcp from cursor. does it read the notes already in tk?
@mostafahosseini yes, when you connect an MCP Client to TK's server, you'll have read access to any notes you can read in TK. Optionally, you can grant write access to create notes.