Kilian Valkhof

Front-end & user experience developer, Jedi.

My productivity system from scratch

Life, 6 July 2017

This article was originally published on The Human In The Machine.

I am not a big ‘productivity’ person. I mostly get by jotting down notes and keeping lists (for whatever I’m doing at the moment, or more general things-to-do-in-the-near-future lists.) It’s manageable enough to not have to adopt a Formal Productivity System. I’m pretty happy about that.

Announcing Polypane, a browser for a responsive web development workflow

Web, 16 May 2017

I’m working on a new browser for web developers and designers, called Polypane. It’s cross-platform (Windows, macOS and Linux) and really really cool.

Your chatbot should have a game loop

Chatbots, 26 April 2017

This article was originally published on

Many of the “smart” chatbots with Natural Language Processing and Artificial Intelligence still have a hard time keeping a conversation going. They keep forgetting whatever it was you were talking about even if you can see it plainly in the message right above!

Messenger Demo Viewer: demo (bot) interactions without showing personal chats

Chatbots, 7 March 2017

After you have made your awesome new Messenger bot, it’s time to demo it. If you made a bot for a professional client you don’t really want to give a demo with the always-present Messenger sidebar with your other personal chats visible for everyone.

Hocus Pocus: PostCSS to finish the trilogy

CSS & HTML, 26 January 2017

Back in 2014, nearly three years ago, I wrote about being tired of always writing a:hover, a:focus and wanting an a:hocus to do both for me. It got a lot of proposed solutions, including a Sass and a future-css one using CSS Aliases. In 2016, a year ago, I revisited the idea with CSS Custom Selectors and CSSNext. For this year, I’m rounding up the trilogy with a PostCSS plugin of my own.



A cross-platform browser for responsive web design and development.


A cross-platform, simple and smart autosaving scratchpad.


Drag-and-drop lossless compression of PNG and JPG images for web.

Messenger Demo Viewer

Demo your (bot) interactions on Messenger.


A Messenger Adventure!

Go on a text adventure in Facebook Messenger.

Fuck Yeah Keming!

A celebration of horrendous kerning.

More projects

Head over to my Projects page for more.

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