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Joey Carpinelli

@jdc.pub
652 followers 255 following 452 posts

Writing research & systems software (Rust, C++) professionally for robotics, personally for astronomy and developer tools. 🔭 Loving Greater Boston. ⚙︎ github.com/jdc-pub ☾ jdc.pub

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Joey Carpinelli @jdc.pub · 22/09/2026
*sobs* But claude-5-sonnet...
Recommendations

Staged next steps, in priority order: 

1. Ask Carpinelli directly. He is active and reachable on
Bluesky (@loopy.codes) and LinkedIn (in/joeycarp). Because he is the author, he can (a) confirm whether the .jl notebook still exists in any local backup, private repo, or branch, and (b) possibly still have a screenshot of the tweet. This is by far the highest-probability path to recovering the actual script and tweet text.
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Joey Carpinelli @jdc.pub · 07/09/2026
How did Markdown get such widespread adoption in 20 short years? AsciiDoc has been around since the literal beginning of time.
Introducing AsciiDoctor, a text
processor and publishing toolchain

January 1, 1970

1-minute read
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Joey Carpinelli @jdc.pub · 31/07/2026
Sick and tired of accusations that Google doesn’t take Nano Banana seriously
Google responded to this article and said:
We take misinformation seriously - every image created with Nano Banana in…
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Joey Carpinelli @jdc.pub · 31/07/2026
🥇
LLMs

They're getting a lot of attention, aren't they?
Anyway, enough about that.

AST

#158942: In this PR I shrank the size of some AST nodes by removing a field. The removed data, when needed, is now stored temporarily to the side. This gave mostly sub-1% reductions in instruction counts.
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Joey Carpinelli @jdc.pub · 21/07/2026
Woah indeed!
He offered that potentially we could leverage eBPE as a programmable way to select an interpreter through binfmt_misc.
Whoa! 🤯
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Joey Carpinelli @jdc.pub · 24/06/2026
"And Then There's Maude!"
A screenshot of the Zed text editor with a Git diff in view. The dependency "maud" is added to Cargo.lock.
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Joey Carpinelli @jdc.pub · 20/06/2026
Physically ill. Sick to my stomach. Screaming, crying, throwing up. Etc.
Approximately 1 in 1,000 machines has a CPU core that occasionally computes the wrong result, likely because of manufacturing defects. In some cases an erroneous computation leads to a crash, but in other cases it leads to a program simply returning the wrong result.

DESIGNING DATA-INTENSIVE APPLICATIONS, Page 109 OF 1367
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Joey Carpinelli @jdc.pub · 12/06/2026
Having LLMs do some review... which one of you are responsible for computers writing like this? I hope you're happy.
The hash is the contract.
The remote is the promise.
The working tree is the lie we agree to tell ourselves.
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Joey Carpinelli @jdc.pub · 11/06/2026
I’m not confident in these answers, FYI! The blog linked in the quoted post talks about wasm. (Quote in the attached screenshot!) Editors like Zed are making wasm builds. Maybe wasm-git could allow for Git operations in the browser?
Another possible use case is a WASM build that could be used to do a super wide range of interesting things. Run nearly any Git command in an edge Vercel function for example. Or maybe you could build things like Cloudflare Artifacts without relying on partial implementations like isomorphic-git but instead a fully compliant WASM build of Grit.
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Joey Carpinelli @jdc.pub · 08/06/2026
🤩
A white t-shirt with a hot dog pictured dancing, and text that reads: “you look like the 4th of July. Makes me want a hotdog real bad.”
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Joey Carpinelli @jdc.pub · 06/06/2026
Future civilizations if you can read this please wake me up I want to see this
10,000 — 1 million

The red supergiant stars
Betelgeuse and Antares will likely have exploded as supernovae. For a few months, the explosions should be easily visible on Earth in daylight.
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Joey Carpinelli @jdc.pub · 24/05/2026
Interest in replicable builds leads to @bearcove.eu’s Vixen which leads to Build Systems à la Carte which leads to “what the hell are higher kinded types” which leads to this. Beware, it can happen to you!
Programming in Haskell

The cover of the textbook with the following content:

Graham Hutton
Programming in Haskell
Second Edition
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Joey Carpinelli @jdc.pub · 11/05/2026
It is time.
A screenshot of a git log view in the Zed editor that reads “HEAD (points to) refactor/gix” and “origin/refactor/gix.”
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Joey Carpinelli @jdc.pub · 09/05/2026
Ventura Highway is such a great song but what is going on this this lyric
A screenshot of Apple Music with the lyrics to Ventura Highway, reading: “Alligator lizards in the air”
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Joey Carpinelli @jdc.pub · 09/05/2026
POV: your LinkedIn DMs when you have a masters degree in aerospace engineering (for civilian space systems, but the recruiters don’t know that)
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Joey Carpinelli @jdc.pub · 08/05/2026
But... why though.
A screenshot of the repository name at the top of a Git repository page. The repository reads: "GitoxideLabs / gitoxide". Above the name, a Safari warning is shown: "This webpage was reloaded because it was using significant energy."
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Joey Carpinelli @jdc.pub · 06/05/2026
In a prompt, I made a reference to an out-of-context project I wrote years ago, so the latest Anthropic model (Opus 4.7) began speculating on how that project was designed. It printed four mostly-plausible options and picked the right one.
Given the user's preference for type systems and their work on codegen, I'd bet on (1) or (2). Probably (1) — a typed handle/token pattern that makes the paired functions structurally dependent. Like RAIl in Rust at the lifecycle-node level.
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Joey Carpinelli @jdc.pub · 20/04/2026
And we don’t say so enough.
A stack of cheese wheels with a sign sitting on top that reads “Cheese is for eating not for sitting”
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Joey Carpinelli @jdc.pub · 13/04/2026
God forgive me, I love New England.
A close-up of a rocky shore overlooking a Massachusetts bay. The wave are turning to white water as they hit the black rocks close to the water. The rocks above the water are green from algae, then tan as bare rock furthest from the water. Across the bay, another shore is seen with houses and a light house.A rocky shore along a Massachusetts bay. Two houses are in the top left of the image overlooking the water. A tree without any foliage is next to one of the houses above the water. In the distance, a faint lighthouse is seen at an opposite shore.
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Joey Carpinelli @jdc.pub · 19/10/2025
3.7% you say… www.hks.harvard.edu/centers/carr...
The large jump in political activity is also notable if we look at the number of people attending events. As of Oct. 18, 2025, at 11:00 PM ET, Strength In Numbers estimates at least 12.8 million people, or 3.7% of the population, have demonstrated against the president since he took office:
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Joey Carpinelli @jdc.pub · 18/10/2025
There’s fine lines between “cringe” and “earnest” and “popular”. As Tris @noboilerplate.namtao.com.ap.brid.gy says: popularity matters. Loved participating in the most popular display of resistance yet here in Boston.
A portrait selfie of a man and woman in a crowd of people.
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Joey Carpinelli @jdc.pub · 26/09/2025
Haven't tried iTerm2, but Ghostty is fantastic. My favorite feature is the quick terminal: "CMD+`" at any time for a floating terminal in the center of the screen. Reminds me of the drop-down terminal Gnome extension. github.com/cadojo/dotfi...
A MacOS desktop with a floating terminal pane in the center of the screen.
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Joey Carpinelli @jdc.pub · 18/09/2025
And less than 6 months later, was beginning the process of writing Project 2025. Then he took aim at broadcasters, and SNL specifically.
"A cool project"
The documents I got from FCC reveal that Carr was first approached on Sept. 9, 2022
by Nathan Leamer, a policy advisor to Ajit Pai, the prominent-and sometimes quirky-former FCC Chairman who served on Trump's transition team. Leamer
connected Carr to Wesley Coopersmith, the chief of staff to the president of the Heritage Foundation.
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Joey Carpinelli @jdc.pub · 07/09/2025
Might have found a new favorite bar shopping downtown with Casey today: Bukowski Tavern near the Prudential Center. I’d give 5 stars! Some other Joe apparently disagrees.
A chalkboard showing a speech bubble hanging over “JOE ON YELP”. The speech bubble says: Gay bar with literary theme. One out of 5 stars.
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Joey Carpinelli @jdc.pub · 30/08/2025
Clouds over a neon blue lake with mossy rocks in the foreground.
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Joey Carpinelli @jdc.pub · 04/06/2025
A tip I read online years ago: if you find your phone’s screen light too harsh at night, even with the stock blue light filter enabled, there’s another way! Color filters (under Accessibility in settings for iPhones) allow you to block all blue light.
A screenshot of the Color Filters page in Accessibility settings on an iPhone.
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Joey Carpinelli @jdc.pub · 12/01/2025
Reading “The Light Eaters” and it’s so much fun. I remember trying this a few years back. I poked a philodendron with a pin, and the voltmeter went up 30 mV. It’s insane how large the electrical response is. 🌿⚡️ bookshop.org/p/books/the-...
CHAPTER 4: ALIVE TO FEELING • 14 OF 59
them or pluck a flower. But we now know they bristle internally with all the force of a startled porcupine or a spooked stallion. Plants are fully aware of our contact with them, and will rearrange their lives to respond to such treatment.
But how is this feeling possible? How is the touch noted by a plant, and how could it possibly be translated into a response? The answer might involve electricity.
Touch a plant, or an animal, and its response will show up on a voltmeter.
One of the earliest attempts to study electricity in plants was made in the 1900s in Kolkata, India, by a biologist, physicist, botanist, and science fiction writer named Jagadish Chandra Bose. J. C. Bose, as he was known, was the pioneer of wireless telecommunication, having discovered millimeter-length electromagnetic waves— the microwaves that made the first radios possible and are used in remote sensing and airport security scanners today. In fact, he built the radio wave
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Joey Carpinelli @jdc.pub · 11/01/2025
This is my second post quoting some billionaire’s bad-faith public comments today so I need to stop, but the “culturally neutered” line stuck out to me because I’ve been reading about Carl Schmitt’s advocacy for autocracy, and it’s hitting the same notes: explicit pining for an aggressive state.
This statement raises a conceptual difficulty that Schmitt was never able to resolve. At times he speaks as though liberalism had succeeded in overcoming natural enmity, and that this is to be regretted. He complains frequently that ours is an "age of
neutralization and depoliticization," and that the healthy tensions of political life have been dissolved by private consumption, public entertainment, and "perpetual discussion" —all identified by him with liberalism. Yet he also asserts that liberalism is political, but unsuccessfully so. The weaknesses of liberal governments-their burdensome legal formalism, their hypocritical "neutrality," their oscillation between military pacifism and moral crusading— are the result of their attempts to evade the natural enmity that defines their own political existence. In either case, liberalism remains, in his view, contemptible.
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Joey Carpinelli @jdc.pub · 10/01/2025
A bunch of weird stuff about the apocalypse, I’m gonna skip down a couple paragraphs and see if things settle down. …oh no
It may be too early to answer the internet's questions about the late Mr Epstein. But one cannot say the same of the assassination of John F Kennedy. Sixty-five per cent of
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Joey Carpinelli @jdc.pub · 21/12/2024
If you have an M1 Mac, and if you use Dev Containers, you might have noticed that sometime in the last year the mounted filesystem permissions are not automatically set inside the container. You can `--add-safe-directory` to Git to fix this, but I think I found another way: these settings!
A screenshot of a Docker Desktop settings window on MacOS. The text reads "Virtual Machine Options" with multiple radio buttons for the settings underneath. The "Docker VMM" setting's button is pressed.
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Joey Carpinelli @jdc.pub · 17/11/2024
@caseyreiland.bsky.social asked me to order a peg-board for kitchen storage and I've been on this page ever since. I wish there was a better way to do this. 😮‍💨
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Joey Carpinelli @jdc.pub · 12/11/2024
Lavender here will keep your sleep schedule solid. She screams at you if you aren’t getting ready to go to sleep by like 10pm.
A dark brown and gray tabby cat sitting on a white windowsill, facing down the windowsill at the camera.
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Joey Carpinelli @jdc.pub · 29/10/2024
Love seeing a headline with teeth from NYT
The Misogynistic, Bigoted and Crude Rally Remarks Trump Hasn't Disavowed 

A range of speakers at Madison Square Garden on Sunday disparaged Latinos, Black people, Palestinians and Jews, and made vulgar references to Kamala Harris.
The Trump campaign has distanced itself from only one of these statements.
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Joey Carpinelli @jdc.pub · 17/09/2024
Exponential growth is wild — joined just over a year ago now 😵‍💫
Celebrating 10M users
#201,553
Joey Carpinelli
@loopy.codes
Joined Jul 3, 2023
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Joey Carpinelli @jdc.pub · 22/07/2024
Thank you, Quanta. We needed this today.
An email with the following text, alongside an image of a chaotic fractal / spiral. 

Why Complete Disorder Is Mathematically Impossible

Each week Quanta Magazine explains one of the most important ideas driving modern research. This week, our math editor Jordana Cepelewicz, discusses Ramsey theory, the mathematical study of how order inevitably emerges from chaos.

Why Complete Disorder Is Mathematically Impossible
By JORDANA CEPELEWICZ
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Joey Carpinelli @jdc.pub · 16/07/2024
Yikes. Surely though they mean microseconds here, right? A second every couple of years?!
“The changes are small — a matter of milliseconds a day — but in our high-tech, hyperconnected world have an important impact on computing systems we have come to rely on, including GPS.”
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Joey Carpinelli @jdc.pub · 08/03/2024
TIL — from Nature Obscura — of the Garden of Planes, a scene inspired by Japanese gardens in the Bloedel Reserve of Washington. The garden featured two gravel pyramids, and was removed after a single fox pooped on top of one of the pyramids every single morning.
According to Haag in an interview in Landscape Architecture Magazine, one reason, besides some internal politics, was because a fox had a den under a nearby stump and "every morn-ing, the fox would come out and leave his morning offering right on top of the gravel pyramid."
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Joey Carpinelli @jdc.pub · 04/12/2023
The famous black & white photo of Albert Einstein looking at the camera with his tongue out.
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Joey Carpinelli @jdc.pub · 09/09/2023
Checked my phone and look at the time @cscheid.net @elizas.website
A screenshot of two posts. The former is a comment, and reads “I see we’re at the fucking around part of the day”. The second post is separate, and reads “might fuck around and implement a cool histogram algorithm”.
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Joey Carpinelli @jdc.pub · 06/09/2023
Me: writing a new typesetting template will make my drafts so much simpler, and so much easier to iterate on! Also me: header: locate(loc => { let current_page = ...
A complicated block of Typst code which checks for page counts, and prints a title-block-banner on the first page of the document only.
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Joey Carpinelli @jdc.pub · 01/09/2023
I'd like to nominate:
Figure 11 in the ArXiv paper linked in the original post. It shows a yellow cartoon person labeled "EARLY-TIME NEW PHYSICS", with an orange cartoon person labeled "LATE-TIME NEW PHYSICS" standing on his head. The orange person is holding a block horizontal bar, with the text above reading "H0". A green person is at the top of the image, upside down, holding a pir of shoes, and labeled "LOCAL NEW PHYSICS". The background of the image is a depiction of the cosmic microwave background radiation.
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Joey Carpinelli @jdc.pub · 12/08/2023
BOB Alert 🚨
The “big orange book” of astrophysics — An Introduction to Modern Astrophysics btw Carroll and Ostlie — stood upright on a wooden desk, in front of a poster of an astronaut grabbing the moon, and next to a rocket-shaped pen-holder.
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Joey Carpinelli @jdc.pub · 08/08/2023
For International Cat Day, meet Lavender! She is tiny and so sweet. She never bites or scratches anyone, even after @caseyreiland.bsky.social and I rudely try to take her to the beach with us. She was in the shelter longer than any other cat because of her grumpy face (not shown). Y’all’s loss!
A brown tabby cat asleep, curled up, with her tongue slightly hanging out. She is laying on a coarse green blanket, on a cream colored couch. A brown tabby cat with light green eyes with her front paws on a window sill, looking outside the window.
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Joey Carpinelli @jdc.pub · 07/08/2023
Photoshoot in honor of Lavender stretching out her paw like that
A brown tabby cat stretched out on a gray blanket next to a silver laptop  A close-up picture of a brown tabby cat laying on a grey blanket in front of a floor-to-ceiling mirror. The background includes reflections of several framed pictures of cartoon solar system bodies: all planets, and Earth’s moon.
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Joey Carpinelli @jdc.pub · 06/08/2023
Cartoon knuckle tattoos that read “DINO NUGS”.
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Joey Carpinelli @jdc.pub · 14/07/2023
“You’re a Black woman who was at The New York Times and, to these folks, that’s like working for Pravda.” www.nytimes.com/2023/07/12/us/texas…
A screenshot of a New York Times article which includes the quote included in the post.
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Joey Carpinelli @jdc.pub · 03/07/2023
Finally, I promised nature & Lavender. Enjoy a glimpse of how pretty Wyoming can be, and a peak at Lav’s grumpy/sweet face.
A lake near the top of a mountain range. Evergreen trees sparsely populate the banks. In the background, a gray cliff sits below a cloud-filled sky. A gray cat with dark gray stripes looking grumpily into the camera. The cat is sitting on a green blanket, on a cream-colored couch. A gray cat is sleeping in a “shrimp pose” on a cream-colored couch in the top left of the photo. In the bottom right, a man in a black t-shirt is laying on his back, with his eyes closed, and his head next to the cat’s head. The photo is overlooking both subjects from above.
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