Working on updating my Your-Age-in-Days app[1] for iOS 26. The main motivation was to have the days I've lived always available on the lock screen with a more native feel than the workaround I had before (nightly Shortcut which updates the background image and adds the current number as an overlay to it).
A side project for my side project: I built my own static site generator with React islands architecture and MDX support, using Bun. (Build your site from .mdx files, output only html+css, progressively hydrate the client with React only as needed).
I've really enjoyed writing blog posts recently. Not only is it a great way to flex your writing muscles, but writing about a topic, unsurprisingly, helps you understand that topic better too. I've had great conversations with friends about the posts I've written as well.
And sort of in that same vein, I've been developing my own static site generator that I eventually want to move my blog to. It's almost certainly going to be a worse SSG than every alternative, but it'll be mine and that's worth something in itself.
Plus it's just been fun to make! I wrote some gnarly code to generate infinitely nestable layouts that I'm kind of proud of. It's the kind of code that's really cool but you can only code on a project for yourself, because if someone else had to debug it, they might say some pretty unkind things about you.
I built a free USCIS form-filling tool (no Adobe required)
USCIS forms still use XFA PDFs, which don’t let you edit in most browsers. Even with Adobe, fields break, and getting the signature is hard.
So I converted the PDF form into modern, browser-friendly web forms - and kept every field 1:1 with the original. You fill the form, submit it, and get the official USCIS PDF filled.
Puzzleship - a free daily puzzles website with the archives paywalled. Right now it has Logic Grid Puzzles and Zebra Puzzles. I'm pretty proud of the LGP generator algorithm and some experienced players also liked the way the puzzles are constructed. This is my first subscription site and it's been online for about 15 days, so I'm learning a lot and trying to figure out the pricing.
I'm working on a meta framework for building "full-stack" libraries. I.e. libraries that bundle frontend hooks, backend routes, and a database schema into a single package.
This allows library authors to do more, like defining webhook handlers and (simple) database operations. The idea is to move complexity from the library user to the author, making (API) integrations easier.
I think libraries being able to write to your database is a pretty powerful concept, and can enable a number of interesting use cases.
I’ve been working on "Next Arc Research" — https://nextarcresearch.com - a wrapper around my curiosity to understand how AI, compute, and capital might change markets by 2030.
It’s not a trading tool or product. More like a weekly, machine-assisted research project. Each cycle I run analyses on 120+ public companies across semiconductors, cloud, biotech, energy, robotics, quantum and crypto. The framing is inspired by Emad Mostaque’s “The Last Economy” thesis — the idea that when intelligence becomes cheap, the physics of value creation start to look very different. I originally built it for myself and retail investors in my family but I figure it could have more general utility so prettied it up a bit.
The system uses large-model reasoning (GPT-5+ though I've also tested Sonnet, Gemini and Grok) combined with structured scoring across technology maturity, risk, competitive positioning, and alignment to AI-era dynamics. The output is static HTML dashboards, PDFs, and CSVs that track month-over-month shifts. I'm adding to it weekly.
Mostly I’m trying to answer questions like:
* Which companies are structurally positioned for outsized upside in The Last Economy?
* How should I deliver the research so that it would have been actionable to someone like me 30 years ago?
* What signals would help folks identify “the next NVIDIA” 5 years earlier?
The inference costs real $$$ so I've set up a Patreon that, hopefully, will allow me to scale coverage and extend the modelling and methodology. There is a free tier and some recent, complete example output on the web site. I'm also happy to gift a free month for folks willing to provide constructive feedback: https://www.patreon.com/NextArcResearch/redeem/CC2A2 - in particular I'm looking for feedback on how to make the research more actionable without drifting into "financial advice".
I don't collect any data but Patreon does for authentication and Cloudflare does to deliver Pages. The Last Economy is here: https://ii.inc/web/the-last-economy
Want to put local history on a map, so when I go somewhere I could ideally just open this webapp and immediately get presented with cool or interesting history that happened close by.
Currently spending time establishing relationships with historical societies, as I really need them to contribute points of interest, and stories. Many of these societies are run on a voluntary basis by 70+ year olds, so it's a long process. Getting some good responses eventually though, so it might actually go somewhere, just a lot slower than I want.
Also still doing https://wheretodrink.beer, but haven't added anything of note since playing on this other project.
Custom Copilot alternative / extension because I no longer believe it is a good idea to let Big Ai determine how you write code with your new helper. Big Tech f'd up a lot of things the last 25 years as we ceded control of our interfaces to them. I don't want to make the same mistake with my primary work tool.
Also, getting into the guts of how agents work and messing around with the knobs and levers is super interesting and where the real differentiating skills are
I don't want to sound rude, but what was your reason to go from scratch instead of joining an already established, open source effort? The likes of Cline, Roo, Continue, ...
Banker.so | Computer inside a computer inside an agent
Started this out by building a spreadsheet controlled by an LLM. Now putting a direct filesystem inside, simplified enough to have programmatic control of slide builders, spreadsheets, terminals and vibecoding applications
Currently working on Klugli - Educational app for German primary school kids (Grades 1-4).
Parents set up accounts, kids log in with simple codes and work through curriculum-aligned Math and German exercises. Built with Elixir/Phoenix/Ash and LiveView.
The hard part isn't the tech - it's creating content that actually maps to the German school curriculum rather than generic "educational" fluff. Currently grinding through grade 2 math topics.
Adding more LSP features to the jinja linter for saltstack that I wrote, so you can see all the bugs in your templates from VSCode (rather than waiting for CI) and do things like “rename this jinja variable everywhere it’s being used”.
The fastest knowledge base for software teams, Outcrop.
A lot of teams enjoy using Linear for product management but still have to use Notion and Confluence for knowledge management. I’ve built Outcrop from the ground up to be fast with much more reliable search and realtime collaboration.
Hundreds of teams from startups and major companies have signed up for early access and many have made early commitments to support the development of Outcrop.
If your team would be interested, I’d like to hear from you!
I'm trying to make localhosting (https://thelocalhostinger.dev/localhosting) a thing. It's about finding ways to strip away unnecessary complexity of selfhosting in very specific edge use cases.
1,023 comments
[ 2.8 ms ] story [ 306 ms ] thread[1]: https://apps.apple.com/de/app/days-of-life-milestones/id6738...
I wrote about it here: https://pcmaffey.com/custom-ssg/
Forkable template: https://github.com/pcmaffey/bun-ssg
And sort of in that same vein, I've been developing my own static site generator that I eventually want to move my blog to. It's almost certainly going to be a worse SSG than every alternative, but it'll be mine and that's worth something in itself.
Plus it's just been fun to make! I wrote some gnarly code to generate infinitely nestable layouts that I'm kind of proud of. It's the kind of code that's really cool but you can only code on a project for yourself, because if someone else had to debug it, they might say some pretty unkind things about you.
and also I am trying to find some time to improve the minimal month planner https://printcalendar.top/
USCIS forms still use XFA PDFs, which don’t let you edit in most browsers. Even with Adobe, fields break, and getting the signature is hard.
So I converted the PDF form into modern, browser-friendly web forms - and kept every field 1:1 with the original. You fill the form, submit it, and get the official USCIS PDF filled.
https://fillvisa.com/demo/
What Fillvisa does:
- Fill USCIS forms directly in your browser - no Adobe needed
- 100% free
- No login/account required
- Autosave as you type
- Local-only storage (your data never leaves the browser)
- Clean, mobile-friendly UI
- Generates the official USCIS PDF, ready to submit
- Built-in signature pad
I just wanted a fast, modern, free way to complete the actual USCIS form itself without the PDF headaches. This is a beta version
https://www.uscis.gov/forms/all-forms
https://www.puzzleship.com/
https://omnispect.dev/
https://donethat.ai
With lot's of built-in data privacy safeguards https://donethat.ai/data
Also made an overview of similar tools out there https://donethat.ai/compare
Recently broke on Linux with a Wayland security update, working on a fix! Using Electron for cross-platform.
This allows library authors to do more, like defining webhook handlers and (simple) database operations. The idea is to move complexity from the library user to the author, making (API) integrations easier.
I think libraries being able to write to your database is a pretty powerful concept, and can enable a number of interesting use cases.
https://github.com/rejot-dev/fragno
It’s not a trading tool or product. More like a weekly, machine-assisted research project. Each cycle I run analyses on 120+ public companies across semiconductors, cloud, biotech, energy, robotics, quantum and crypto. The framing is inspired by Emad Mostaque’s “The Last Economy” thesis — the idea that when intelligence becomes cheap, the physics of value creation start to look very different. I originally built it for myself and retail investors in my family but I figure it could have more general utility so prettied it up a bit.
The system uses large-model reasoning (GPT-5+ though I've also tested Sonnet, Gemini and Grok) combined with structured scoring across technology maturity, risk, competitive positioning, and alignment to AI-era dynamics. The output is static HTML dashboards, PDFs, and CSVs that track month-over-month shifts. I'm adding to it weekly.
Mostly I’m trying to answer questions like:
* Which companies are structurally positioned for outsized upside in The Last Economy?
* How should I deliver the research so that it would have been actionable to someone like me 30 years ago?
* What signals would help folks identify “the next NVIDIA” 5 years earlier?
The inference costs real $$$ so I've set up a Patreon that, hopefully, will allow me to scale coverage and extend the modelling and methodology. There is a free tier and some recent, complete example output on the web site. I'm also happy to gift a free month for folks willing to provide constructive feedback: https://www.patreon.com/NextArcResearch/redeem/CC2A2 - in particular I'm looking for feedback on how to make the research more actionable without drifting into "financial advice".
I don't collect any data but Patreon does for authentication and Cloudflare does to deliver Pages. The Last Economy is here: https://ii.inc/web/the-last-economy
Currently trying to better contextualize the visible subregion of the matrix in relation to the full dataset (beyond what the current minimap does).
https://cybernetic.dev/matrix
Currently spending time establishing relationships with historical societies, as I really need them to contribute points of interest, and stories. Many of these societies are run on a voluntary basis by 70+ year olds, so it's a long process. Getting some good responses eventually though, so it might actually go somewhere, just a lot slower than I want.
Also still doing https://wheretodrink.beer, but haven't added anything of note since playing on this other project.
And react2shell was a blast
Ai-rganize — For using AI to sort files/folders on your local environment (Mac, Windows or Linux). (https://github.com/adefemi171/ai-rganize)
yaml2mcp — Got tired of writing MCP servers in JSON so I decided to build this as well. (https://github.com/adefemi171/yaml2mcp)
Also, getting into the guts of how agents work and messing around with the knobs and levers is super interesting and where the real differentiating skills are
Built on ADK, CUE, and Dagger
https://github.com/hofstadter-io/hof/tree/_next/lib/agent
(my swiss army knife for dev work, getting a rename soon(tm))
Started this out by building a spreadsheet controlled by an LLM. Now putting a direct filesystem inside, simplified enough to have programmatic control of slide builders, spreadsheets, terminals and vibecoding applications
Parents set up accounts, kids log in with simple codes and work through curriculum-aligned Math and German exercises. Built with Elixir/Phoenix/Ash and LiveView.
The hard part isn't the tech - it's creating content that actually maps to the German school curriculum rather than generic "educational" fluff. Currently grinding through grade 2 math topics.
https://klugli.de
Vine but for user-submitted microgames
Docs: https://xelly-games.github.io/docs/intro
A lot of teams enjoy using Linear for product management but still have to use Notion and Confluence for knowledge management. I’ve built Outcrop from the ground up to be fast with much more reliable search and realtime collaboration.
Hundreds of teams from startups and major companies have signed up for early access and many have made early commitments to support the development of Outcrop.
If your team would be interested, I’d like to hear from you!
https://outcrop.app
https://imedadel.com/outcrop
imed at outcrop.app
Buying, researching and analyzing automotive data is broken. Trying to fix that bit by bit
Right now I am tinkering with wails (https://github.com/wailsapp/wails) to build an app store.