Carlos Scheidegger
@cscheid.net
Principal Engineer at Posit (fka RStudio), technical lead at quarto.org
Learning Brazilian Choro and the 7-string guitar
Learning Brazilian Choro and the 7-string guitar
Progress! We've graduated to parsing bugs on 3-way interactions: github.com/quarto-dev/q...
bad parse with softbreaks, blockquotes, and cite · Issue #92 · quarto-dev/quarto-markdown
> a > @c This appears minimal: remove the softbreak remove the blockquote and it passes remove the citation and it passes
github.com
November 10, 2025 at 9:23 PM
Progress! We've graduated to parsing bugs on 3-way interactions: github.com/quarto-dev/q...
I think I've gotten to a point of my Choro guitar playing where I can tell it sounds bad, but it... feels good?
It's nice to no longer dread practicing!
It's nice to no longer dread practicing!
November 10, 2025 at 5:50 PM
I think I've gotten to a point of my Choro guitar playing where I can tell it sounds bad, but it... feels good?
It's nice to no longer dread practicing!
It's nice to no longer dread practicing!
As a Brazilian reading an Argentinian, it gives me no pleasure to recommend an essay that focuses the unhealed collective soccer trauma of an entire nation into the sickest, sickest of burns
But it is a great damn essay, and an all timer of a burn
But it is a great damn essay, and an all timer of a burn
New Substack post: we’ve all heard about the Great Feminization article and we’ve all delighted at how badly even friendly conversations went for its author. Now we ask the question: is Helen Andrews just wrong, or is she interestingly wrong?
open.substack.com/pub/someunpl...
open.substack.com/pub/someunpl...
Lady Parts
The radical feminism of the Great Feminization
open.substack.com
November 10, 2025 at 3:53 AM
As a Brazilian reading an Argentinian, it gives me no pleasure to recommend an essay that focuses the unhealed collective soccer trauma of an entire nation into the sickest, sickest of burns
But it is a great damn essay, and an all timer of a burn
But it is a great damn essay, and an all timer of a burn
Academics don't go over time on your presentations, challenge level impossible
November 6, 2025 at 6:49 PM
Academics don't go over time on your presentations, challenge level impossible
Dammit y'all, I'm now hungry.
November 4, 2025 at 4:18 PM
Dammit y'all, I'm now hungry.
Excellent post throughout. This a class I wish I could take!
November 4, 2025 at 3:51 PM
Excellent post throughout. This a class I wish I could take!
Reposted by Carlos Scheidegger
A machine learning view of the randomized controlled trial, as a bridge from patterns to actions.
Instrumentalized Actuarial Predictions
The randomized controlled trial as a natural extension of machine learning
www.argmin.net
November 4, 2025 at 3:30 PM
A machine learning view of the randomized controlled trial, as a bridge from patterns to actions.
I love our roborock, but it loves to play footsie when I'm working on my standing desk and it kind of freaks me out every time. Can't the cameras detect feet and keep their distance?
November 3, 2025 at 9:00 PM
I love our roborock, but it loves to play footsie when I'm working on my standing desk and it kind of freaks me out every time. Can't the cameras detect feet and keep their distance?
Reposted by Carlos Scheidegger
arXiv will no longer accept review articles and position papers unless they have been accepted at a journal or a conference and complete successful peer review.
This is due to being overwhelmed by a hundreds of AI generated papers a month.
Yet another open submission process killed by LLMs.
This is due to being overwhelmed by a hundreds of AI generated papers a month.
Yet another open submission process killed by LLMs.
Attention Authors: Updated Practice for Review Articles and Position Papers in arXiv CS Category – arXiv blog
blog.arxiv.org
November 1, 2025 at 5:28 PM
arXiv will no longer accept review articles and position papers unless they have been accepted at a journal or a conference and complete successful peer review.
This is due to being overwhelmed by a hundreds of AI generated papers a month.
Yet another open submission process killed by LLMs.
This is due to being overwhelmed by a hundreds of AI generated papers a month.
Yet another open submission process killed by LLMs.
Can you all spare some love for the poor old anxious lady preparing for fire alarm drills this morning? 🥺
November 3, 2025 at 3:09 PM
Can you all spare some love for the poor old anxious lady preparing for fire alarm drills this morning? 🥺
If you want to know what hell is, I'm debugging a tree-sitter external scanner, and the values in the _boolean_ valid_symbols array eventually spell "markdown" in ASCII.
those should all be either 0b00000000 or 0b00000001.
I'm back in 1993-era buffer overflows. Great!
those should all be either 0b00000000 or 0b00000001.
I'm back in 1993-era buffer overflows. Great!
October 30, 2025 at 1:22 PM
If you want to know what hell is, I'm debugging a tree-sitter external scanner, and the values in the _boolean_ valid_symbols array eventually spell "markdown" in ASCII.
those should all be either 0b00000000 or 0b00000001.
I'm back in 1993-era buffer overflows. Great!
those should all be either 0b00000000 or 0b00000001.
I'm back in 1993-era buffer overflows. Great!
The deeper I get into m̦aking a͕ r͇̟̓obust Markdo̸w͉̩ͣn parse̥̿ͅr̸̋, t̮he clearer͚̾̃ I̜̍ͩ ș̄tart se̦ͯeing th̀̍ͭé u̡̲ͣn̙ͬi̋v͋̕ers̎̆͢e̴ͣͣ
October 29, 2025 at 3:00 AM
The deeper I get into m̦aking a͕ r͇̟̓obust Markdo̸w͉̩ͣn parse̥̿ͅr̸̋, t̮he clearer͚̾̃ I̜̍ͩ ș̄tart se̦ͯeing th̀̍ͭé u̡̲ͣn̙ͬi̋v͋̕ers̎̆͢e̴ͣͣ
Wowee someone hotboxed our building elevator, good lord
October 27, 2025 at 11:16 PM
Wowee someone hotboxed our building elevator, good lord
Today's pedant eye twitch, brought to you by "mIRC chat rooms"
October 27, 2025 at 2:30 PM
Today's pedant eye twitch, brought to you by "mIRC chat rooms"
I hadn't come across this essay until now. It's very, _very_ good, and you should read it.
(minor: I can't help but wonder what a wank analysis would say about the essay itself, right around the Clausewitz reference.)
Still, the first 2/3rds are truly excellent. Again, go read it if you haven't.
(minor: I can't help but wonder what a wank analysis would say about the essay itself, right around the Clausewitz reference.)
Still, the first 2/3rds are truly excellent. Again, go read it if you haven't.
like i dunno i know a lot of yimbys, i participate in local yimby group events, the idea that we're swimming in venture capitalist cash is just crazy. it's just delusional. it is, in the technical sense, wank:
deadsimpletech.com/blog/essay_o...
deadsimpletech.com/blog/essay_o...
An essay on wank | deadSimpleTech
This captures well the uncomfortable, slightly disorienting feeling that wank creates when you're subjected to it, wherein you're expected to speak about and think about the statement as though it say...
deadsimpletech.com
October 27, 2025 at 1:46 PM
I hadn't come across this essay until now. It's very, _very_ good, and you should read it.
(minor: I can't help but wonder what a wank analysis would say about the essay itself, right around the Clausewitz reference.)
Still, the first 2/3rds are truly excellent. Again, go read it if you haven't.
(minor: I can't help but wonder what a wank analysis would say about the essay itself, right around the Clausewitz reference.)
Still, the first 2/3rds are truly excellent. Again, go read it if you haven't.
Do you use homebrew? PSA!
Something on homebrew decided to add this gem of a line to my .zshenv:
echo 'export PATH="/opt/homebrew/bin:$PATH"' >> ~/.zshenv
Apparently I started a shell 6500 times before realizing this problem. (Guess how I knew the number)
I'm just speechless.
Something on homebrew decided to add this gem of a line to my .zshenv:
echo 'export PATH="/opt/homebrew/bin:$PATH"' >> ~/.zshenv
Apparently I started a shell 6500 times before realizing this problem. (Guess how I knew the number)
I'm just speechless.
October 25, 2025 at 10:29 PM
Do you use homebrew? PSA!
Something on homebrew decided to add this gem of a line to my .zshenv:
echo 'export PATH="/opt/homebrew/bin:$PATH"' >> ~/.zshenv
Apparently I started a shell 6500 times before realizing this problem. (Guess how I knew the number)
I'm just speechless.
Something on homebrew decided to add this gem of a line to my .zshenv:
echo 'export PATH="/opt/homebrew/bin:$PATH"' >> ~/.zshenv
Apparently I started a shell 6500 times before realizing this problem. (Guess how I knew the number)
I'm just speechless.
Look you can’t convince me that some of the truly wild good bell labs stuff (like, say, S) isn’t at least in part from acid.
I met some old bell labs people, is all I’m saying
I met some old bell labs people, is all I’m saying
Possibly weirded out my long-suffering colleagues with this idiosyncratic observation last week, and feel like it belongs in a meme.
#rstats #python #ripdavidlynch
#rstats #python #ripdavidlynch
October 25, 2025 at 2:34 AM
Look you can’t convince me that some of the truly wild good bell labs stuff (like, say, S) isn’t at least in part from acid.
I met some old bell labs people, is all I’m saying
I met some old bell labs people, is all I’m saying
I mean, what do you even say.
Marc Andreessen, who sits on Meta's board, is funding a click farm www.404media.co/a16z-backed-...
a16z-Backed Startup Sells Thousands of ‘Synthetic Influencers’ to Manipulate Social Media as a Service
Andreessen Horowitz is funding a company that clearly violates the inauthentic behavior policies of every major social media platform.
www.404media.co
October 24, 2025 at 8:25 PM
I mean, what do you even say.
I understand why SICP has fallen out of favor, but I think it remains the single best text to improve one’s software engineering skills.
So many hard problems in software are best solved by finding the language hidden inside the problem, and writing an interpreter/translator program
So many hard problems in software are best solved by finding the language hidden inside the problem, and writing an interpreter/translator program
October 23, 2025 at 1:48 PM
I understand why SICP has fallen out of favor, but I think it remains the single best text to improve one’s software engineering skills.
So many hard problems in software are best solved by finding the language hidden inside the problem, and writing an interpreter/translator program
So many hard problems in software are best solved by finding the language hidden inside the problem, and writing an interpreter/translator program
I will personally donate $10k to a charity of your choice if you figure out how to stop folks from putting spaces in their filenames.
October 21, 2025 at 3:21 PM
I will personally donate $10k to a charity of your choice if you figure out how to stop folks from putting spaces in their filenames.
"Markdown is great, people can read Markdown, LLMs are good at Markdown, we don't need error messages"
October 20, 2025 at 12:35 PM
"Markdown is great, people can read Markdown, LLMs are good at Markdown, we don't need error messages"
gfd it people, don't obviously use LLMs to write _academic papers_. What is wrong with y'all that you do not understand how that's a dumb fucking thing to do?
The entire-ass point of academic papers is for you to tell me what you think. If I wanted to know what an LLM thinks, I WOULD ASK IT MYSELF.
The entire-ass point of academic papers is for you to tell me what you think. If I wanted to know what an LLM thinks, I WOULD ASK IT MYSELF.
October 17, 2025 at 4:52 PM
gfd it people, don't obviously use LLMs to write _academic papers_. What is wrong with y'all that you do not understand how that's a dumb fucking thing to do?
The entire-ass point of academic papers is for you to tell me what you think. If I wanted to know what an LLM thinks, I WOULD ASK IT MYSELF.
The entire-ass point of academic papers is for you to tell me what you think. If I wanted to know what an LLM thinks, I WOULD ASK IT MYSELF.
Quarto friends! I need your help:
We are implementing a new QMD parser in Quarto. It will be super nice. But it's a big change, and we want to minimize the impact.
1. Can you share a link to your Quarto project at github.com/quarto-dev/q...
2. repost this and let your Quarto friends know too?
We are implementing a new QMD parser in Quarto. It will be super nice. But it's a big change, and we want to minimize the impact.
1. Can you share a link to your Quarto project at github.com/quarto-dev/q...
2. repost this and let your Quarto friends know too?
Epic: are we production yet · Issue #63 · quarto-dev/quarto-markdown
We need to check against many large sites to get a good sense for the impact of this new syntax in practice. autogenerated qmd quartodoc-generated sites (tbd meet with @machow) sites quarto.org Shi...
github.com
October 16, 2025 at 2:13 PM
Quarto friends! I need your help:
We are implementing a new QMD parser in Quarto. It will be super nice. But it's a big change, and we want to minimize the impact.
1. Can you share a link to your Quarto project at github.com/quarto-dev/q...
2. repost this and let your Quarto friends know too?
We are implementing a new QMD parser in Quarto. It will be super nice. But it's a big change, and we want to minimize the impact.
1. Can you share a link to your Quarto project at github.com/quarto-dev/q...
2. repost this and let your Quarto friends know too?
This may just be the best CS paper I’ve read this year. Just read the abstract and first para of the intro! The rest of the intro is really wild too, but very very good:
dl.acm.org/doi/pdf/10.1...
dl.acm.org/doi/pdf/10.1...
October 14, 2025 at 1:12 PM
This may just be the best CS paper I’ve read this year. Just read the abstract and first para of the intro! The rest of the intro is really wild too, but very very good:
dl.acm.org/doi/pdf/10.1...
dl.acm.org/doi/pdf/10.1...
Artline markers! They’re refillable too. If you’re forced to not use the Actual True Superpowers (hagoromo chalk on a good blackboard), then Artline 5109As are an acceptable alternative. They’re also readable from 25 feet away (and erase cleanly) which is a concrete accessibility win!
October 13, 2025 at 6:51 PM
Artline markers! They’re refillable too. If you’re forced to not use the Actual True Superpowers (hagoromo chalk on a good blackboard), then Artline 5109As are an acceptable alternative. They’re also readable from 25 feet away (and erase cleanly) which is a concrete accessibility win!