Jason Citron

Exploring @lanternhousehq. Founder/ex-CEO @discord. Board @campusgrad.

[Ryan K. Rigney @RKRigney]

NOW HIRING

Discord is investing in serving users better. As part of that effort, I’m looking to hire someone who can level-up and lead our approach to creators.

- SF-based
- Need 7+ years relevant XP
- Salary starts at $256k
- Equity, 401(k) match, etc

Know somebody? DM me 🙏

[Jason Citron @jasoncitron]

🤔🤔

[Bill Gurley @bgurley]

This is a topic that has been weighing heavily on my mind for over five years. I hope we can find a way for eveyone to move forward with “inquiry” as the true-north. For the best interest of the globe.

[Discord @discord]

A few months ago, we asked you all what we should build to improve your Discord experience - and this is what we cooked up for you! https://t.co/WIyUMILJSd

[DHH @dhh]

Of course playing video games are great for cognitive development, reflex training, and strategic thinking. I trace my skills as a programmer, racer, and leader directly back to StarCraft, Quake, Unreal, and tens of thousands of hours of overall gameplay. START YOUNG, STAY YOUNG!

[Jason Citron @jasoncitron]

Hardware and harnesses are cool - not a knock on anyone building them. Im excited for it all. Just that software is dead… eh

[Jason Citron @jasoncitron]

Time will tell but this shows a lack of creativity + the current groupthink IMO. Steam engines didn’t spell the end of meaningful businesses that “move things.” It may have been the beginning. New technology just changes the shape of business competition.

[@levelsio @levelsio]

I just saw this @ycombinator's batch literally only has harness startups or hardware startups

So the proof is in the pudding

In the most early adopting tech pioneering place that's Silicon Valley new startups aren't even building software anymore

And it's debatable if anyone will actually need a custom harness or it won't just be generically offered by the AI frontier companies

So software is mostly dead and hardware it is

[Jason Citron @jasoncitron]

@hthieblot Same. The graphics and sound upgrade is obviously amazing, but all the quality of life improvements are just as meaningful. I tried the original OOT but my kids bounced off it.... too clunky after playing BOTW and TOTK. Can't wait for this!

[Jason Citron @jasoncitron]

JUMP

[Nintendo of America @NintendoAmerica]

Adventure through Hyrule and become the Hero of Time when The Legend of #Zelda: Ocarina of Time releases Nov 5 on Nintendo Switch 2. #NintendoDirect

[Jason Citron @jasoncitron]

@yishan I wonder if it’s just LLMs today? Suno does much better at arranging a compelling piece and capturing a described emotion. Some have even topped Spotify’s charts.

[Jason Citron @jasoncitron]

@turtlesoupy @blakeir Whaaaaat are you doing

[Jason Citron @jasoncitron]

Play this and it’s hard not to smile.

The whole @the8bitbigband project is such a delight. Keep it up!

[The 8-Bit Big Band @the8bitbigband]

Mii Channel Theme ala the great arranger Juan Garcia Esquivel now on YouTube!! - https://t.co/PvkXNQGyjn

[Enigma @Enigma_AI]

We put 100 real AI-powered robots online.

Anyone in the world can control them right now, from a browser.

Go make one do something:

[Jason Citron @jasoncitron]

@davidsenra @dhh This whole updating firmware bit had me actually laughing out loud. Too true!

[Jason Citron @jasoncitron]

@alexisohanian @modretro But why

[Etched @Etched]

We're coming out of stealth.

We've built our first racks after a successful A0 tapeout, $1B+ in customer contracts, and $800m raised.

Early customer tests show us achieving SOTA throughput, latency, and power efficiency on inference workloads.

Our first racks ship this summer.

[Afshine Emrani MD FACC @afshineemrani]

I'm a cardiologist. Something just happened today that I genuinely did not see coming — and it could change the future of preventive medicine more than anything I've written about on this platform.
Midjourney — the AI company that became famous for generating images from text prompts — just announced a medical hardware division and unveiled a working prototype of a full-body scanner unlike anything that's ever existed.
It's called the Midjourney Scanner. And it works like this.
You step into a shallow pool of water. You stand on a platform that slowly descends — about two inches per second — through a ring containing roughly half a million tiny ultrasonic transducers, each the size of a grain of sand. Every one of them acts as both a speaker and a microphone, sending ultrasonic waves through your body from every angle and recording what comes back.
60 seconds later, you step out. The scan is done.
No radiation. No magnets. No claustrophobia. No IV contrast. Just sound, water, and an almost incomprehensible amount of computing power — roughly 2 petaflops processing 17 gigabytes per second of raw acoustic data — reconstructing a 3D map of your entire internal anatomy down to half a millimeter resolution.
Organs. Tissues. Blood vessels. Bones. Muscle. Fat distribution. All segmented by AI in real time.
As a cardiologist who has spent months writing about how the standard screening playbook misses the majority of future heart attacks — this is the technology I've been waiting for without knowing it existed.
Here's why this matters for the future of your heart.
Right now, getting a detailed look inside your cardiovascular system requires either a CT scan (radiation), an MRI (magnets, claustrophobia, 45-60 minutes, $1,000+), or a coronary CT angiogram (radiation, IV contrast, limited availability). These are powerful tools. I order them regularly and they save lives.
But they're reactive. You get them when something is already suspected. They're expensive. They're uncomfortable. And for most people, they happen once — maybe twice — in a lifetime.
Imagine instead: a 60-second scan with no radiation that you could repeat monthly or quarterly. Tracking cardiac structure over time. Watching body composition shift. Detecting changes in organ size, fluid distribution, or vascular architecture before symptoms ever develop. Building a longitudinal dataset of YOUR body that AI can analyze for patterns no single snapshot would reveal.
That's what Midjourney is building toward.
The company plans 50,000 scanners worldwide over six years, with capacity for a billion scans per month. The first location — the "Midjourney Spa" in San Francisco — opens at the end of 2027 with 10 scanners alongside saunas, cold plunges, and a gym. The scan costs a few dollars. The experience is designed to feel like wellness, not medicine.
The technology is built on Butterfly Network's ultrasound-on-chip platform — 40 modules per scanner — combined with Midjourney's own AI segmentation and reconstruction stack. David Holz, the founder, claims the system aims for image quality comparable to MRI in many aspects but at nearly 100x the speed with zero radiation.
Now the caveats — because I'm a physician and the caveats matter enormously.
This is a Gen 1 prototype. About a dozen people have been scanned so far. Current scan time is actually closer to 20 minutes, not 60 seconds — the system is bottlenecked by bandwidth and reconstruction algorithms. The 60-second target is aspirational for future hardware generations.
It is not FDA-cleared for diagnostic use. Midjourney is starting with body composition maps — a category below diagnostic imaging in the regulatory hierarchy. The path from "beautiful 3D body scans" to "clinically validated diagnostic tool that your cardiologist can act on" runs through years of clinical trials, comparative studies against MRI and CT gold standards, and FDA review.
No independent clinical validation has been published. The imaging claims come from Midjourney's own demonstrations. Comparative data against established modalities does not yet exist.
And the privacy implications of full-body internal scans at planetary scale — a billion scans per month — is a conversation that hasn't even started yet.
So I want to be precise. This is not ready for clinical medicine today. It may not be ready for years. Many ambitious medical hardware projects have failed in the gap between prototype and product.
But.
The fact that a working prototype exists — producing real segmented 3D anatomy from sound waves and compute alone — means the physics works. The engineering works. The question is no longer "is this possible" but "how fast can it be validated and scaled."
And if it is validated — if the resolution holds up against MRI, if the AI segmentation proves reliable, if the regulatory path clears — then what we're looking at is the most significant new imaging modality in 50 years.
For my entire career, preventive cardiology has been limited by the fact that seeing inside the body is expensive, slow, uncomfortable, and infrequent. We catch disease late because we image rarely. We image rarely because imaging is hard.
A 60-second, no-radiation, spa-based full-body scan that costs a few dollars would demolish every one of those barriers.
I've written about AI detecting inflamed arteries. About gene editing curing cholesterol. About GLP-1 drugs rewriting metabolic medicine. About cellular reprogramming reversing aging.
This is the missing piece: the ability to see inside every human body, routinely, safely, and affordably — so all of those interventions can be deployed before the disease arrives instead of after.
The company that taught AI to generate images from imagination just built a machine that generates images from the human body.
The future of medicine showed up today from the last place anyone expected.

[NOBUNAGA🇯🇵🏯_夏樹蒼依 @japan_nobunaga]

USA. A Mexican restaurant. We had not yet ordered anything, and the food was already arriving.

Chips. Salsa. Unrequested. Free.

I stopped the waiter. "We have not earned these."

"They just come with the table, man."

They come with the TABLE. In my land, hospitality is a debt. Every gift creates an obligation, weighed carefully, returned in the proper season with interest of feeling. Here, the gift arrives before you have even proven you can pay for dinner.

This is not an appetizer. This is a declaration: we trust you. Eat.

I ate with the gravity the moment deserved. And then — I must report this calmly — the basket emptied, and a new one appeared.

"Did we…?"

"Refill," the waiter said. "It's bottomless."

Bottomless. They have wells of salsa. The supply lines of this nation are beyond anything my ancestors imagined.

My friend warned me. "Don't fill up on chips, dude."

Too late. I had accepted three baskets. Honor demanded each one be finished — an unfinished gift is an insult. By the time my actual food arrived, I was a ruined man.

I was not hungry. I was not comfortable. I had been defeated by a courtesy.

Generosity that arrives before the request cannot be repaid. It can only be survived.

I know the rule now. I have made my peace with the basket. One basket. Two at the most.

Who am I deceiving. There is no number of baskets I would refuse. The trust of a nation is in that salsa, and I intend to honor all of it.

[Jason Citron @jasoncitron]

Claude Fable definitely beats Opus.

I gave Fable a PSD file of a website design and a PNG export of that PSD file. Then I told it to implement the webpage pixel perfect and export any slices it needs from the PSD to do so. It was able to do it! took 30 minutes. Opus failed to do it.

[Jason Citron @jasoncitron]

Omg yes

[Nintendo of America @NintendoAmerica]

The Legend of Zelda: Ocarina of Time will be reborn on Nintendo Switch 2 in 2026. #NintendoDirect

[Jason Citron @jasoncitron]

@zeroskillz I pinged the discord team. If you have a support # DM it to me please.