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indexzero

@charlie.dev

Engineer πŸ—οΈ Leader🧘Founder πŸ§— The moment of truth is always now

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09.05.2023
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Latest posts by indexzero @charlie.dev

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It is truly unknown now if we survive as a species beyond the consequences of our own actions

Up until these papers I held out hope that something could be done.

Sadly, they show with clear science that there is no stopping Thwaites collapse πŸ’”

tc.copernicus.org/articles/19/...

17.02.2026 00:54 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Critical thresholds for ice basin stability

Critical thresholds for ice basin stability

I weep for humanity www.nature.com/articles/s41...

17.02.2026 00:44 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Ames expressed the popular security more wisely: "that [an autocracy] is a merchantman, which sails well, but will sometimes strike on a rock, and go to the bottom; whilst a republic is a raft, which would never sink, but then your feet are always in water."

Emerson, 1844, quoting Fisher Ames, 1795

05.02.2026 03:48 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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"We may not always succeed. But never will we be accused of lacking the courage to try."
β€” Zohran Kwame Mamdani

Absolute πŸ”₯ This is right up there with

"We choose to [...] do [these] things, not because they are easy, but because they are hard"
β€” John Fitzgerald Kennedy

02.01.2026 01:55 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Today, social media platforms hold the sole power to study the effects of feed-ranking algorithms. We developed a platform-independent method that reranks participants’ feeds in real time and used this method to conduct a preregistered 10-day field experiment with 1256 participants on X during the 2024 US presidential campaign. Our experiment used a large language model to rerank posts that expressed antidemocratic attitudes and partisan animosity (AAPA). Decreasing or increasing AAPA exposure shifted out-party partisan animosity by more than 2 points on a 100-point feeling thermometer, with no detectable differences across party lines, providing causal evidence that exposure to AAPA content alters affective polarization. This work establishes a method to study feed algorithms without requiring platform cooperation, enabling independent evaluation of ranking interventions in naturalistic settings.

Today, social media platforms hold the sole power to study the effects of feed-ranking algorithms. We developed a platform-independent method that reranks participants’ feeds in real time and used this method to conduct a preregistered 10-day field experiment with 1256 participants on X during the 2024 US presidential campaign. Our experiment used a large language model to rerank posts that expressed antidemocratic attitudes and partisan animosity (AAPA). Decreasing or increasing AAPA exposure shifted out-party partisan animosity by more than 2 points on a 100-point feeling thermometer, with no detectable differences across party lines, providing causal evidence that exposure to AAPA content alters affective polarization. This work establishes a method to study feed algorithms without requiring platform cooperation, enabling independent evaluation of ranking interventions in naturalistic settings.

New paper in Science:

In a platform-independent field experiment, we show that reranking content expressing antidemocratic attitudes and partisan animosity in social media feeds alters affective polarization.

🧡

01.12.2025 07:59 πŸ‘ 153 πŸ” 67 πŸ’¬ 4 πŸ“Œ 3

invisalgo is the anti-zalgo – the unicode code points the light forward but the truth lurks through the zalgo! slash u two zero zero slash u two zero six hallow be thy prefixes

26.11.2025 06:14 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The year is 2026 and AggregateError (finally) exists by indexzero Β· Pull Request #15 Β· indexzero/errs One night in 2011, I awoke and I had to write this package. Several hours later, it was published. ... nearly 15 years later ... when seeing AggregateError land in ES2026 the same needless urgency ...

dear past me: the future is weird we have robot interns now github.com/indexzero/er...

26.11.2025 06:07 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Zβ€‹β€Œβ€a⁠⁑lβ€‹β€Œg⁣⁀o⁠!β β€‹β€Œ ‍⁒0vw! Hβ€‹β€Œe⁠⁑⁒ ‍cβ€‹β€Œo⁣m⁠⁑eβ€‹β€Œs‍⁒!

26.11.2025 04:31 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

When I thought about it more I realized I already knew that product: it's called Microsoft Codeplex ☠️

So ... GitHub is dead! Long live GitHub!

21.11.2025 02:05 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

With this new feed tonight, I know my deepest fears have become reality. GitHub as I knew it is dead. Why? Because shipping even a Beta preview of it without the most defining feature β€” the social feed β€” shows how little that matters compared to the next AI slop feature

21.11.2025 02:05 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

When Microsoft acquired GitHub, I was afraid. Afraid that the myopic lens so endemic to the Borg cube would destroy it. A lens focused on everything that is NOT open source

And I hate it when I'm right

21.11.2025 02:05 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

One where there are many more private repositories than public

One that has become a staple of professional software engineers even more than it ever was for open source artisans

21.11.2025 02:05 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Instead, nearly every day since then I've gone to github.com to discover and learn from other practitioners in this art we call open source

That feed was what made GitHub, well, GitHub. Over time, that website grew into the behemoth that it is today

21.11.2025 02:05 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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I am one of the first 5,000 GitHub users, and I am disappoint

15 ago I submitted a change on M$FT Codeplex to the Prism project after using the framework at a large financial institution

I was told that contributions were only accepted from M$FT employees. I never went to that website again ⬇️

21.11.2025 02:05 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Thanks to Ken Burns TOL Boston was basically an island during the American Revolution

18.11.2025 02:44 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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What a long strange trip it's been πŸ’πŸš€ Excited for what's cooking for 2027 πŸ—½It won't be what's come before β€” and that's the point

10.11.2025 15:38 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Jurors Find Sandwich Hurler Not Guilty of Assault

The Onion headlines are real life now, what a time to be alive www.nytimes.com/2025/11/06/u...

07.11.2025 03:57 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The Florentine Diamond Resurfaces After 100 Years in Hiding

The truth is always more interesting than a movie plot. What a fascinating relic of European History to come to light. I can't wait to go see it when it goes on display in Canada! www.nytimes.com/2025/11/06/a...

06.11.2025 14:12 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

For me, it's been New York or nowhere since Day 1 πŸ‘Ά and it always will be πŸ—½I always knew the people of New York would not bend the knee ✊ no matter what the fascist Oompa-Loompa-in-Chief lied to the contrary 🀑 and Mamdani's resounding victory backed by historic voter turnout is just the beginning πŸ‡ΊπŸ‡Έ

05.11.2025 07:40 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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> Some people, when confronted with a problem, think, β€œI know, I’ll use regexp", now you have two problems

It's amazing how even after all that time, the Internet I have known & loved is there. And the most recent comment is the most perfect book end imaginable πŸ€“

regex.info/blog/2006-09...

04.11.2025 17:08 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Keynote

Mikeal knew this, and I will be forever in his debt for what I learned from him. I'm looking forward to integrating his pkv ideas into _all_docs in the coming months 🧠 we both didn't see it then, but he was onto something important πŸš€

I hope you enjoy the story πŸ’š all-docs.talks.charlie.dev

30.10.2025 18:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

That it is just one problem a more holistic content addressable web make easier to solve. But the bigger the problem, the more contributors that need to gather

30.10.2025 18:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Package managers and the shared digital infrastructure for delivering packages to them become ever more important. If we step back and broaden our scope we see that it is just one flavor of a larger metadata & addressing problem

30.10.2025 18:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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I knew speaking at @jsconf.bsky.social 2025 would be hard, because so much of what I had to talk about I learned from Mikeal Rogers – and am still learning even now. The goal of the talk was to tell part of that story, a story about how the web isn't finished, yet πŸ’‘

all-docs.talks.charlie.dev

30.10.2025 18:50 πŸ‘ 9 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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24 years ago I shipped my first piece of software from this building. Reflecting on that now the world and my life were set in motion in those weeks

You see, two weeks later a pair of commercial airplanes crashed into the World Trade Center a few blocks away

NY Forever πŸ—½

24.09.2025 13:08 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Looked at my data collections for state-backed activity. If the report were a picture:

13.09.2025 23:47 πŸ‘ 16932 πŸ” 4794 πŸ’¬ 244 πŸ“Œ 213

Multi-tasking is not good for my internal LLMs tokenization accuracy πŸ€¦β€β™‚οΈ

11.09.2025 16:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I don't know? But if nothing else I trust now you at least want to schlep down to Maryland next month πŸ™ƒ

11.09.2025 13:20 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Nice @wesbos.com! @tracy.bsky.social and I are bringing the whole family with us🀠

11.09.2025 06:33 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Wait, does this mean that Captain Kirk is never born now?

11.09.2025 00:33 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0