Josh On Design

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past future

    Can we still make software that sparks joy?

    March 19th, 2026

    A diatribe in when I am greatly disappointed in my industry.

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    Tagged: gui ai rant

    A Senior Engineer Tries Vibe Coding

    March 1st, 2026

    If you live on planet earth and you are at all connected to software you've probably tried out 'vibe coding', ie: using an AI tool to write software for you. As someone who's been writing software for close to four decades I've seen code automation tools come and go. Believe it or not, people used to talk about Visual Basic in the same breathless tones of today's vibe coding tools. The outcome has always been that the new tech never lives up to the hype but can be useful in some contexts. The tricky part is always figuring out what it's good at and what it isn't. I believe these AI tools will go the same way; but hey, maybe this time it's different. I can't talk about what I haven't experienced, so I tried experiments this week. Here's what I learned.

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    Tagged: gui ai

    Embedded GUI Layout Algorithms

    October 7th, 2025

    Layout is one of the hardest problems in UI toolkit design because there are so many different ways to design a layout. Creating a system that supports them all is practically impossible. Even creating a system that merely makes them all possible to implement (even if difficult) is a challenge. And making the layout fast is even harder. However, given that we are targeting embedded systems, rather than general purpose interfaces (ex: no resizable windows), we should be able to narrow down the scope to something usable. Let’s dig in.

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    Tagged: rust embedded embeddedrust gui

    2025 JS13K WebXR Entries

    September 25th, 2025

    This year's JS13K Entries.

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    Tagged: webxr

    Embedded Rust GUI Progress report

    September 16th, 2025

    As part of my ongoing research with embedded Rust on ESP32 devices, (starting with the T-Deck but eventually branching out to other devices), I started creating a simple reusable UI toolkit to automate the boring code that I end up writing over and over for every example. The code is on github but I haven't made a crate for it yet.

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    Tagged: rust embedded embeddedrust

    Accessing the Keyboard and Screen on the LilyGo T-Deck with Rust

    August 27th, 2025

    I’m really enjoying using nostd Rust for embedded programming on the [Lilygo T-deck](https://lilygo.cc/products/t-deck?srsltid=AfmBOooByFjhRNf0GYZImQ4xz2IpCBmELtidro9PzSlUJ90iCgWRWSA) and I want to share what I’ve learned so far. There are many excellent tutorials and docs on Embedded Rust in general and the ESP32 in particular, so I’m going to cover things that are specific to the T-deck or that I’ve found to be under documented. Today let’s start by looking at the T-deck’s signature feature, the keyboard.

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    Tagged: rust embedded embeddedrust

    Slaughterhouse Five

    August 19th, 2025

    I don't know why I waited until I was almost fifty to read Slaughterhouse Five. I'd always heard it was a groundbreaking work of sci-fi, but I didn't know why. Now that I've read it I can say that it's not really sci-fi, but it certainly is groundbreaking.

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    Tagged: bookreview

    Rust on the LilyGo T-Deck

    August 13th, 2025

    I've been having a lot of fun with this little device called a LilyGo T-Deck. It's built on an ESP32-S3, has a 320x240 touch screen, a funky little track ball, built in wi-fi, and a seriously nostalgia-inducing physical keyboard. I bought the T-Deck about a year ago but because I was sick (with undiagnosed Type 1 Diabetes) and haven't done much with it until the past few weeks.

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    Tagged: rust embedded embeddedrust

    Thoughts on LLMs and the coming AI backlash

    February 13th, 2025

    I find Large Language Models fascinating. They are a very different approach to AI than most of the 60 years of AI research and show great promise. At the same time they are just technology. They aren’t magic. They aren’t even very good technology yet. LLM hype has vastly outpaced reality and I think we are due for a correction, possibly even a bubble pop. Furthermore, I think future AI progress is going to happen on the app / UX side, not on the core models, which are already starting to show their scaling limits. Let’s dig in. Better pour a cup of coffee. This could be a long one.

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    Tagged: life rant

    Remembering Mixed Reality

    January 23rd, 2025

    Working in the Mixed Reality group at Mozilla was the most fun I ever had in my 30 year career. Helping to usher a new technology into the world. One with such potential. I’d really love to go back there. Unfortunately it seems there isn’t really a there to go back to. Cue memory fade.

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    Tagged: life rant

    My Areas of Interest for 2025

    January 16th, 2025

    I’ve been quiet lately, not because I’ve had nothing to say but because I’ve not felt well enough to say it. That changes today. 

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    Tagged: life rant

    IdealOS Thinking

    June 25th, 2024

    One of my original IdealOS blog posts from 2017 showed up on the front page of Hackernews the other day (comments here). This got me thinking about IdealOS again. I haven’t worked on it in a couple of years, but as I read through the comments and links to articles by people with similar ideas, I came to a realization. I am still working on it. Maybe not directly, but I’m still exploring ideas that are needed to build IdealOS. So with that in mind let’s take a look at what I’ve been working on lately.

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    Tagged: idealos

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