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🚇🇸🇬 we made a SG MRT station guessing game
- 3 tries to match the names to 5 stations on the MRT map
- hints provided for line + direction
- speedrun mode so you can brag to friends
- island-wide tour if you're good enough
try it here: 👉 mrt.eiti.dev 🚇
no one's surprised, because everyone's moved to @heliumbrowser
We've decided to sunset Arc on December 22, 2026.
That's not an easy sentence to write. We spent years building Arc and celebrating each and every release along the way: we have so much pride and love for what we made alongside the Arc community.
Our priority is to deliver best-in-class security for our members. Keeping a browser secure takes constant, dedicated work that is only increasing in the age of AI. Dia was built from the ground up to meet today’s security standards, so that's where our engineering and security teams will focus moving forward.
We've worked to make switching to @diabrowser as easy as possible for Arc members. Here's how:
· Your passwords, bookmarks, extensions and history come over to Dia seamlessly.
· Spaces, Folders, and Tab Groups are in Dia and import over with your data intact.
· Dia now surpasses Arc benchmarks in stability, speed, and security.
· The browser features you use in Arc are free in Dia, and the AI is optional.
Thank you for using Arc, for pushing us to make it better, and for building alongside us. The team that made Arc is the same team behind Dia, and some of our most ambitious work is just ahead. We'd love for you to be there with us when it lands.
atzy retweeted
Introducing Pond, your free and open-source archiver.
Pond keeps everything you save online, quietly in the background, so you can always find it again, the way you remember it.
→ pond.raphaelsalaja.com
atzy retweeted
interpretability might be the most important scientific problem in the world right now, as I don't think we can solve alignment if we don't know what we're building. I think I have good news about it. I co-authored early work in mechanistic interpretability at OpenAI and came away pessimistic, because neural networks appeared to fold into arbitrary tangled knots. years later, I started openai's first large-scale automated interpretability project, finding about 2% of neurons legible with the primitive tools we had
with modern agentic tools and a much closer look, the picture looks totally different. the vast majority in models up to trillions of parameters are legible, and their circuits beautiful. many famous examples of tangled neurons turned out to be misunderstood. The roadblocks I expected mostly aren't there. I now think ambitious interpretability will be solved by the time we need it most, and possibly quite soon, as automated scientists keep improving. it may be a bitter lesson for interpretability: the simple thing, at absurd scale, works
already-clean.goodfire.com/
atzy retweeted
New on our Engineering blog: Creating in-house source control.
In May, we merged around 2,500 code changes per day. In September, we merged more than 30,000 per day. As a result, we became bottlenecked by developer infrastructure built for human (rather than agent) scale.
Here, we share how we built a new version control system—and fully migrated our monorepo from git—in five months: anthropic.com/engineering/re…
atzy retweeted
I built a native Metal renderer for Minecraft, and a shader that takes advantage of it: volumetric fog, dynamic lighting, water reflections and more.
It runs at 60fps at full retina resolution on a 5-year-old MacBook. I've always hated how laggy minecraft is with shaders, now it's solved.
Shoutout to Opus and Astra!
atzy retweeted
Every game is moddable now!
I packaged everything Claude learned modding Terraria and Age of Empires into universal-modder: skills + tools that let Claude Code mod almost any game you own. Engine recon, decompiling, @fal sprites/3D/audio, testing in the real game, even the showcase video.
github.com/rehan-remade/univ…
Readers added context they thought people might want to know
The video compiles unrelated mods by other creators (e.g. Minecraft in Elden Ring by @TobynJacobs; real-time battles in Pokémon Emerald by @germanburgardt), not work from the advertised repo. Only the final Terraria/AoE clips match its examples.
github.com/rehan-remade/u…
github.com/GBurgardt/poke…
x.com/TobynJacobs/st…
x.com/rehan_shei/sta…
atzy retweeted
after several months of negotiations, my website has agreed to be released
mamuso.dev/note/imperfection
atzy retweeted
why open animal crossing 24hr chill mix in one tab, and google docs in another? just do your writing inside of a modded AC town
atzy retweeted
Introducing... Interfaces that think
A series exploring new UI interactions for the AI erea. Excited to kick off this series with episode 1 where I explore text and autocomplete
demo videos can be created so easily now. what do you mean i don't have to spend the last 1h of a hackathon hacking together a demo video and can just get opus to iterate it with me as we vibe
haven't felt so strongly about personal software since.. a year ago?
but i'm invigorated to make them again, opus 5.5 > astra on making custom-tailored apps really quickly and way better
pictured: bigwall of twitter bookmarks (using github.com/afar1/fieldtheory…)
haven't felt so strongly about personal software since.. a year ago?
but i'm invigorated to make them again, opus 5.5 > astra on making custom-tailored apps really quickly and way better
pictured: bigwall of twitter bookmarks (using github.com/afar1/fieldtheory…)
atzy retweeted
Destroy any website with a stickman.
Have fun: destroy.spritefusion.com
atzy retweeted
Increasingly convinced: people who do best with agents are those that are good at shipping things in small pieces.
Someone who could ship a feature in 4 commits going to main now does better with agents than the guy who always ended up with a 6k PR on Friday afternoon.
as an experiment, Astra managed to port one of my childhood games to the web, in 6 hours and a single prompt
I remember rushing into the computer lab during science lessons with my friends to play this silly game where we had to run digestive system as a tiny robot
helping this man chew his food, digest the chunks, passing it through the intestines, to learn about digestion
of course in a bid of nostalgia i tried finding the game a decade later, but at the time the company site had disappeared and no more copies of this game could be found
all that remained was a reddit thread reddit.com/r/askSingapore/co…
a few years ago I found the exe installer in an old 16mb thumbdrive! i immediately booted a windows XP VM and tried installing (couldn't run on modern windows)
alas the game was made entirely in Adobe Director, and multiplayer had stopped working 6 years ago
i tried to port it to a web version, but failed with GPT-5.4, 5.5, sol, opus, and even fable
but just yesterday, i decided to try it with astra, and it blew the entire process out of the water with agent coordination + browser/computer use
after six hours and a few subagents, it managed to bring the game to the web, and two other prompts later, P2P multiplayer support was done
there's a real use case for bringing back lost media with AI
site completely done by astra and sol: gutfeel.atzy.dev
started a new role doing product & AI infra!
just returned from a month onsite in the greatest city in the world (NYC), was almost tempted to extend my stay
