Matt Keller

Always building. Sometimes myself.

[Matt Keller @substr]

Science does not discriminate.

[taoki @justalexoki]

can't believe i spent my whole life becoming Good At Computer only for Computer to become Better At Computer

[Ivan Kuleshov @Merocle]

The "S" in "Local AI" stands for Savings

[Cormac @cormachayden_]

software engineers before vs after agents

[Matt Keller @substr]

@BrettRocker95 Feed it some reference images of the players and it does a decent job

[Matt Keller @substr]

@levelsio Bad math on the vibejam site... "Real CASH prizes! $35,000 total in cash prizes!" should be $40k unless I'm missing something.

[Omkar @psomkar1]

Interviewer : where do you see yourself in 5 years ?

Me :

[Matt Keller @substr]

@MsAshBash420 I don’t know where the floor has been…

[Matt Keller @substr]

Throwing my hat in the ring this year.

Design doc locked for Powder Keg, an arcade pirate battle royale 🏴‍☠️

Low-poly, no textures, cartoon lighting, bot backfill, 16+ player lobbies. Let's build.

#vibejam #buildinpublic #threejs #gamedev

[Matt Keller @substr]

@InfragilisTee If we’re counting those, wouldn’t it be ~24 billion?

4B men x2: 8B
4B women x4: 16B
Total: 24B

[NASA @NASA]

We see our home planet as a whole, lit up in spectacular blues and browns. A green aurora even lights up the atmosphere. That's us, together, watching as our astronauts make their journey to the Moon.

[Aakash Gupta @aakashgupta]

This is one of the most important studies in sleep science.

Van Dongen et al. ran the experiment that changed how we understand chronic sleep restriction. They had subjects sleep 4h, 6h, or 8h nightly for 14 days, testing cognitive performance every 2 hours.

The 6h group’s reaction time deficits by day 14 matched subjects who had been awake for 24 hours straight. The 4h group? They performed like someone awake 48 hours.

But here’s what makes this study terrifying.

The Stanford Sleepiness Scale ratings in Panel B plateau after day 3-4. Subjects stopped feeling more tired even as their cognitive performance continued deteriorating through day 14. Your subjective experience of fatigue is a lagging indicator that eventually just… stops updating.

This explains why chronic undersleeping feels sustainable. You’ve adapted to feeling tired. Your prefrontal cortex hasn’t adapted to being impaired.

The PVT (Psychomotor Vigilance Task) in Panel A measures lapses in attention. These are the moments where you’re staring at a screen and your brain simply checks out for 500ms. Every additional day of 6h sleep adds more lapses. The curve never flattens.

Panel C and D show working memory and processing speed. Same pattern: continuous degradation with no subjective awareness.

The practical implications:

If you’re sleeping 6h and think you’re functioning fine, you’ve lost the internal calibration to know you’re not. The subjects in this study would have told you they felt “okay” while performing like they’d pulled an all-nighter.

For anyone doing cognitively demanding work, this means you cannot trust how you feel. You need to track objective markers: error rates, decision latency, problem-solving throughput.

Sleep need is biological, not negotiable. Most adults require 7-9 hours, and the research shows no population-level adaptation to chronic restriction. “I only need 6 hours” is almost always “I’ve forgotten what baseline cognition feels like.“

[CG @cgtwts]

The longer you spend in tech, the stronger the urge to buy a farm and never touch a computer again in your life.

[Matt Keller @substr]

@nickschifrin @POTUS @jonasgahrstore @NobelPrize Are we the baddies?

[Matt Keller @substr]

If this isn’t grounds for the 25th amendment, I no longer have faith in our already diminished checks and balances.

[Nick Schifrin @nickschifrin]

NEW: @potus letter to @jonasgahrstore links @NobelPrize to Greenland, reiterates threats, and is forwarded by the NSC staff to multiple European ambassadors in Washington. I obtained the text from multiple officials:

Dear Ambassador:

President Trump has asked that the following message, shared with Prime Minister Jonas Gahr Støre, be forwarded to your [named head of government/state]

“Dear Jonas: Considering your Country decided not to give me the Nobel Peace Prize for having stopped 8 Wars PLUS, I no longer feel an obligation to think purely of Peace, although it will always be predominant, but can now think about what is good and proper for the United States of America. Denmark cannot protect that land from Russia or China, and why do they have a “right of ownership” anyway? There are no written documents, it’s only that a boat landed there hundreds of years ago, but we had boats landing there, also. I have done more for NATO than any other person since its founding, and now, NATO should do something for the United States. The World is not secure unless we have Complete and Total Control of Greenland. Thank you! President DJT”

[tido bling @tiido_bling]

“Depression cannot hit a moving target.”

Best shit I’ve heard all year.

[Matt Keller @substr]

@verge https://t.co/bslBB27Epf

[Matt Keller @substr]

@David954FLA A deeply flawed hockey team when their leadership is out injured.

[Matt Keller @substr]

@FortniteStatus JD must be LIVID

[Matt Keller @substr]

@SunoMusic Vocal personas (& tuning)

[Matt Keller @substr]

@E1_Martillo @SleeperMarlins