Medium is a home to read and write human stories. Share knowledge and wisdom with the world—without having to build a mailing list or a following first. The internet is noisy and chaotic; Medium is quiet yet full of insight. It’s simple, beautiful, collaborative, and helps you find the right readers for whatever you have to say.
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.
Free Options
Launch Team
Render Sandboxes: a computer for every agentIsolated compute, persistent state and a real filesystem
Promoted
Hey Product Hunt 👋
I’m Tony, CEO of Medium. TK is our new agentic notebook, built by people who love to write, for a world that now runs on words.
Every AI tool you use gets better the more of your thinking it can read, so every word you write, even the messy ones, works on your behalf.
Chat apps can help you research, but TK helps you write. Three simple steps level up your writing: craft, compound, create.
1. Craft. Writing is thinking.
Craft your best writing distraction free—no clutter and a TK agent that works inline so that you never have take your fingers off the keyboard.
Pull ideas from an instant memory of all your words: voice memos from your walk, partial drafts, Granola notes, Claude research chats, anything you’ve ever written on Medium, and, yes, your old Bear or Obsidian vault.
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2. Compound. Every note makes the next one more useful.
Deep thinking comes from building on what you’ve written before. The TK agent can remember, prompt next steps, and organize all your writing. You can /wikify anything into a mini knowledge base, transform raw ideas into blog posts, and transform blog posts into books.
The deepest thinking requires feedback, so TK ships with built-in social and agentic feedback loops.
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3. Create. The more you write, the more influence you have on the world.
Share privately, publish publicly. Turn your ideas file into apps with Claude Code. Pass your written intelligence to any agent you work with.
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For maximalists, connect your writing to your entire agentic universe and run your entire day from a single Daily Note. Install the TK Claude plugin for this extremist view on fighting brain fry.
Free tier ships with everything other note taking apps charge for: unlimited notes, publishing, and collaboration. Plus built-in agent and social layers.
Pro tier is $12/month for full access to the TK agent, skills, summaries, and MCP.
Onward to more writing!
@Medium's back, baby!
TK is a super compelling entry into the daily note-taking world, with an agentic, mind-amplifying twist.
Lately I’ve been pondering how to build a harness for my mind, because I can already feel the sloppification (🫠) when I let AI do too much of my thinking.
Start with a messy daily note at the top of your day, work through the thought, then get feedback from readers you trust. If you lean in, you can think of TK as a kind of gym for your mind, helping you get those reps in, without too much fuss — with room to write with agents and without handing over the writing or losing your mind.
@chrismessina This is exactly the way! The entire agentic universe is begging for more human intelligence and if you want to harness it all you have to do is write more.
I wish there were a way to say this that wouldn't sound so cheesy: I remember what it felt like to get my blogger account, and to be able to write about muddy, messy, or even mundane things, and turn strangers into lifelong friends because of words. I remember what it felt like to get my twttr account, and turn strangers into lifelong friends because of words. These past months of the TK beta have felt exactly the same. And, yet again, I feel complete strangers becoming lifelong friends, just because of words.
So, yeah, I 1000% subscribe to the premise underlying this moonshot, and I'm glad you keep going and keep trying and keep believing that writing is thinking, and thinking is important.
Thanks for being an early adopter,@thomasknoll ! Your feedback and experience has helped us shape the product into something even better!
@kassandra_mendes 💛💜💚
I think there’s probably no cohort online that’s more skeptical about the rise of LLMs than writers, which I say as someone who’s published a few million words online. So it’s a pretty remarkable testament to the thought and care that the Medium team put into TK that they’ve gotten the balance exactly right for what real writers might want to see out of an “AI” tool that actually does what we’d want.
The biggest thing for me is that this isn’t an app where I prompt the AI, it’s where the AI prompts me. That’s exactly the right inversion of the balance of power, and makes me optimistic about where this platform is headed.
@anildash You are right on. I'm not sure why other products struggle to understand the job to be done, which is to elevate human thought rather than replace it.
I've been using TK for a few months and have really been enjoying it. Go Tony and Team!
Thanks@zackshapiro ! Glad to hear you're enjoying TK.
I'm one of the engineers on TK, so take this with the appropriate grains of salt, but I joined the team as someone who wrote in brief, sporadic bursts, very occasionally. I admit I was worried about joining Medium, a company built on writing, and the TK team, to build a product to write in, as someone who wasn't a habitual writer.
Building TK, and using it, has made me a fierce believer in writing as a practice. At the most foundational level, writing is a way to think, and writing is also a way to force yourself to think about what you want to write about, even when you're not writing. This is good, and is achievable with a pencil and paper. You can also do it in a bare-bones editor. And you can do some great organization and discovery and search with an editor, and there are great tools to do this.
The thing that's new, of course, is LLMs. LLMs operate on text. Their nature is textual.
Someone (I truly wish I could find who to credit for this) made the metaphor that LLMs are "text elementals." (forgive me, I'm about to nerd out about Dungeons and Dragons, but briefly: "elementals" are magical entities in D&D that have special traits associated with and abilities to manipulate one of the four "elements": earth, air, fire or water) As "text elementals," LLMs exist on the text plane, their home is words and they operate on words and they can do something that feels like magic with words. So when you, as a writer, create words, you're extending the plane on which these text elementals can operate, and they grant you a different kind of power to operate on those words.
Sometimes this is goofy (one of my favorite skills in TK is a "high school alignment chart" that classifies a corpus of writing in the classic nerd/jock | prep/nerd quadrants) and sometimes it's genuinely powerful. We have users writing books, using TK's assistant to help them organize themes and find inconsistencies. I use it to extract themes from essays I write about TK, and to help me organize my thinking about the product itself and how we build it. I have a handful of cron jobs that launch Claude Code and run skills I've built to search for and collect user feedback in TK and share that to a TK library, which is indexed nightly by an llm-wiki skill. Then, I can use the output of those skills, and my own writing, to improve the product, and improve my thinking about the product, and write (like I am here) as a human being about the things the text elementals have discovered for me.
Anyway, this product has been a labor of love for me and -- I think it's safe to say -- everyone on the team, and I hope using it brings you as much joy as it's bringing us to build it.
I've had a blog since 2003, and I started writing on Medium in 2015. I've written mostly about public health (my day job), but I also write about my life and the things that interest me. It's been great to grow a community on Medium, and I'm excited about the possibilities of a bigger community on TK, a community of writers. I've been using TK for a few months, and it has kept me writing each day, reading other people’s writing, and thinking about how to better communicate the complex issues I want to write about. TK is simple, but powerful. It really does feel like a notebook with some superpowers that help you write without writing for you.
I love how you described it as a notebook with superpowers, @rene_najera . I totally agree!