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This is the 11th launch from Medium. View more
TK by Medium
Launching today
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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Launch Team
Framer AI AgentsDesign and publish professional sites with AI
Promoted
It’s become second nature to reach for TK. It started with just some daily journaling, which just by itself was delightful, but I’ve started working in TK because it’s just so smooth for writing and refining. I’ve used the skill and Claude integration to create a social media content machine that searches for idea nuggets, expands them into social media posts or video scripts, then Claude grabs them and drops them into ordinal. I feel a bit like a god? And the content I’m sharing is still mine, and sounds like me.
I didn't "work" on this app in the engineering sense, but I worked on this app in that I've written literally thousands of words in it, shared feedback with the team, watched it turn into something amazing, and (most importantly for me) had space to write out my muddled, messy thinking in a clean, free space until my ideas started making sense.
Thinking should be hard, that's what makes it valuable. Writing all your thoughts makes it easier, and TK is the perfect place to do so. My random musings have ultimately turned into:
A book draft
A marketing memo I was proud to share with the company
Blog posts that reached thousands of readers
Who knows what else is yet to come? The more I write, the more possibility those nuggets of thoughts turn into polished, influential writing that spreads.
It's not just having a place to drop the thoughts -- TK's AI helped find the connections between what I originally thought were random, unrelated ideas. But when you have a place to write down all your thoughts and an agent combing through your scribbles for the gems, it's much easier to start turning notions into notes into the next big thing.
All this to say, I have loved working on and in TK and I can't wait to bring it to more users!
TK is the cornerstone of my day. It's where I write to clear my head in the morning, where I run my schedule, and where I turn when new ideas come up that I want to get down. I used it last week for a memo about the future of search and for my Saturday shopping list. And I love that I don't have to tag or structure any of my writing, just write once, and it's available for me to explore forever. It's also turned writing from a thing I wish I was doing more of into an actual daily habit. So excited to have it now in the hands of many more people to see what the community does with it.
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'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.