Quality is so rare sometimes that it is a genuine relief when you stumble upon it.

A new day, a new wigglystuff widget enters the scene ...

This is happening again, and it's the coolest thing. Do consider participating! I'm prepping my marimo notebook story during the weekends again :) some.3b1b.co/

I may be able to demonstrate some new tools at this event. That includes some personal things, as well as things that we've been cooking at marimo. Do join for the hallway track! luma.com/twmvmr5r

Great song sometimes package some life advice. Be yourself Give your free will a chance You've got to want to succeed

Amazing songs sometimes have amazing life advice " Choose not the life of imitation "

We are going live later today with a first public preview of polars cloud. Count me excited! youtube.com/live/TTMecr...

Wigglystuff has a new, and very satisfying, graph widget! Give it as spin in our WASM environment here: molab.marimo.io/github/koan...

We're doing an extra livestream this week with Hamel Hussain Small hint: it'll be about notebooks. youtube.com/live/XaKvqd...

If you're gonna vibe-code, you still want to make great software exist. But that's not easy. Great software is 99% invisible. www.youtube.com/watch?v=5gw...

We're gonna go live in a bit, feel free to join live! youtube.com/live/AWqNIr...

You know that feeling, that you think you can add a new feature only to find out that it is already supported?

Believe it or not, but thanks to conductor I now find myself learning a little bit of Lua (not hard at all, super fun language) and Love2D. Why? Well, because all of this has just unlocked my SteamDeck, that's why! www.youtube.com/watch?v=FDc...

It's been a while since I've been *this* excited about a thing. More details soon!

After reviewing nearly 140 submission notebooks, we saw some patterns in what made a marimo notebook stand out. Made a video to summarise the learning of our first "game jam for Python notebooks": youtu.be/rlfTVCXieHg

The keyboard is not for everyone. But I wish more boards could automate the mouse like this one does. It does it so well! youtu.be/0y1jKq6RzjY

If you're looking for a remarkable gift, something that can make the receiver touch a bit more grass and have a bit more calm in their lives ... magicpuzzlecompany.com/ These really are remarkable, outstanding and an unexpected triumph.

I moved the wigglystuff docs from mkdocs-material to zensical and I gotta say, pretty smooth transition sofar! koaning.github.io/wigglystuff/

The uptime chart from Gitlab.

People sometimes ask me what it's like to work at marimo. Many thoughts but lemme pick two: - We have 20% time, similar to Google Fridays! - The downloads have gone 10x in the year that I worked here. We now do half a mil a week! These two things are related.

People should not sleep on the new EVoC clustering algorithm. It's got me rethinking a lot of my widgets and bulk labelling tricks. youtu.be/1roN51JXuX8

We're planning a bunch more livestreams over at marimo and if you're a fan of polars ... just sayin' ... you might want to tune in for this one! youtube.com/live/TTMecr...

Been thinking about this quote a lot lately. “If I finish a book a week, I will read only a few thousand books in my lifetime, about 0.1% of the contents of the greatest libraries of our time. The trick is to know which books to read.” koaning.io/posts/all-t...

Going live in 10 minutes www.youtube.com/live/d4wGcj...

Tonight I will show two demos. The first is marimo-pair, which gives your agent access to Python variables and *all* the UI elements in your notebook. The second is a new IDE. And it will be the first public preview. See you soon! luma.com/fh2skeg7

I can't share the stuff I see in Slack just yet. But I can predict one thing: the future is more power to the Python widgets, not less.

It's so much fun to forget that we added a feature, only to spot it by accident when you're working on something. This is how we render all PyTorch models by the way.

Small detail people seem to have missed from the announcement: this keyboard is gonna support ZMK firmware. The keyboard probably won't have mechanical/replaceable switches ... but they keyboard should be fully programmable! That's great!

We're slowing adding features so that you might consider stepping away from powerpoint. Remember: this can connect to your postgres/bigquery/databricks datasets *and* you have sliders/widgets.

It really took me a while to "get it" when it comes to nbdev. But I gotta hand it to Jeremy Howard this way of working makes too much sense once you're used to it. As of today, I am working on tools that make this kind of work possible in marimo. youtu.be/ZLg27UmAJbw

You'd be surprised how often I write emails like this.

I used to run a CRON server locally and I can now happily say that it's been an absolute joy to switch to Prefect instead. The cli is nice, the dashboard is nice, and the Python code still very much looks like Python. Also super nice to run these jobs locally.

The trick to getting the open source LLMs to be better at Python has little to do with "waiting for a better model". We made a new harness and ... yeah ... I'm using KimiK2 a whole lot more now. Here's a demo a demo of KimiK2 with marimo-pair: youtu.be/ZBI7BDUK1Es

This time 'round I didn't review a keyboard but a trackball! youtu.be/DmV5KP64EwY

People sometimes ask me why I still like to work with Python notebooks given that LLMs can also generate web-apps for us. The difference to me comes down to the fact that I really like it when my software is usable like legos. koaning.io/posts/legos...

It took 6 months to go from 0 to 500k views on YT. Today we crossed the 1.5M milestone. But it only took us 2.5 months to go from 1.0M to 1.5M views this time around.

The best April 1st moments are those that aren't merely an announcement, but something that actually works. So yeah, happy to announce that we got DOOM running inside a @marimo_io notebook!

When you make a lot of demo projects, oh my, make sure you prune UV!

Fun experiment of the day: use a neural network to solve TSP. No gradient? No problem! Evolutionary strategies applies! Not sure if it is practical yet, but fun times none-the-less.

Have people seen the latest 3b1b video? Because I sure did ...

By the time you see this screenshot, the feature will be live! Think of it as a new kind of blog where we celebrate Python notebooks :) ... and widgets! So many novel widgets!

This was a fun rabbit hole indeed! We recently added gcc to molab containers for Cython support, but it turns out that technically ... you could also use Zig! It is available via pypi! That's an interesting unlock! Feel free to read the nerdsnipe here: cemrehancavdar.com/2026/03/05/...

What's the weirdest prompting trick you know? Is it repeating the same prompt twice? No. It's repeating the prompt ... three times. Details and benchmark in this video: youtu.be/j2viZGPSydY

Been making some dashboards for myself ...

Notebook productivity is going only up now that it is easy to make your own library of JS <-> Python widgets to help you do your work. The interaction is *super* helpful.

When people start to notice your hobby project ...

We're getting pretty close to automating stuff like this.

I tried to type "database", got "databae". I also learned that the domain name is already taken.

I'm recording a video for all my fellow bayesians to help explain why a break even point is less relevant than the distribution of the break even point. In the same video, I also explain how to code defensively so that Claude actually picks the correct distribution.