Carlos Scheidegger
@cscheid.net
Engineer at Posit, technical lead for quarto.org
Touching grass by learning Brazilian music. feet in Minneapolis, heart in some random Brazil beach town I don't even know yet
DMs open, please try to be normal out there
Touching grass by learning Brazilian music. feet in Minneapolis, heart in some random Brazil beach town I don't even know yet
DMs open, please try to be normal out there
Pinned
Carlos Scheidegger
@cscheid.net
· Sep 1
Ok, I've seen enough. I can't contribute to this medium anymore. I don't know what happens next. We resuscitate blogs and go from there? I don't know. But this is fucked, and I don't think participating at all is net positive.
Back to pure work announcements, I guess. DMs open, love y'all
Back to pure work announcements, I guess. DMs open, love y'all
Reposted by Carlos Scheidegger
No joke. I think this is the most important video I have ever seen about mobile games. This guy breaks down how this game psychologically profiles you, and makes the game harder or easier in order to show you ads
October 14, 2026 at 3:04 PM
No joke. I think this is the most important video I have ever seen about mobile games. This guy breaks down how this game psychologically profiles you, and makes the game harder or easier in order to show you ads
Reposted by Carlos Scheidegger
Virginia Vassilevska Williams wrote some thoughts about the 3-SUM breakthrough Josh Alman and her wrote an exposition of, how it happened, what it means, and some context about 'what could have been' in a world with more time and fewer models.
Read it here: people.csail.mit.edu/virgi/though...
Read it here: people.csail.mit.edu/virgi/though...
https://people.csail.mit.edu/virgi/thoughts.txt
A week has passed since Josh and I posted our write-up on the arXiv, and I decided to write a few things.
Much was said about our write-up. Some were excited, others enraged. Most everyone was scar...
people.csail.mit.edu
October 13, 2026 at 7:44 PM
Virginia Vassilevska Williams wrote some thoughts about the 3-SUM breakthrough Josh Alman and her wrote an exposition of, how it happened, what it means, and some context about 'what could have been' in a world with more time and fewer models.
Read it here: people.csail.mit.edu/virgi/though...
Read it here: people.csail.mit.edu/virgi/though...
Fun to read this in 2026; I had forgotten about the intro. (it was written in 1995: www2.math.upenn.edu/~wilf/AeqB.pdf)
October 13, 2026 at 4:12 PM
Fun to read this in 2026; I had forgotten about the intro. (it was written in 1995: www2.math.upenn.edu/~wilf/AeqB.pdf)
I'm genuinely glad I read this and worked through all the stages of grief Before Present Discourse; the paper is easily on the pareto front of the (excellence, inspires-dread) diagram.
Good morning, I had a terrible time reading this over breakfast
Fascinating account showing how a false claim can become widely accepted (and propagated by multiple independent sources) as a result of a common academic shortcut: citing a source you haven't actually read after seeing it cited by another source: journals.sagepub.com/doi/full/10....
October 13, 2026 at 3:44 PM
I'm genuinely glad I read this and worked through all the stages of grief Before Present Discourse; the paper is easily on the pareto front of the (excellence, inspires-dread) diagram.
Reposted by Carlos Scheidegger
get in loser we're going right round baby right round
October 13, 2026 at 6:45 AM
get in loser we're going right round baby right round
This is what misalignment looks like
October 13, 2026 at 1:54 PM
This is what misalignment looks like
Reposted by Carlos Scheidegger
You know, the thing is, I had drafted this piece a month ago, and then never published it, because I thought maybe it was too mean.
October 13, 2026 at 7:24 AM
You know, the thing is, I had drafted this piece a month ago, and then never published it, because I thought maybe it was too mean.
Reposted by Carlos Scheidegger
Interviewer: can you explain this gap in your CV?
Person who wrote the layout engine for Microsoft Word: absolutely not
Person who wrote the layout engine for Microsoft Word: absolutely not
interviewer: can you explain this gap in your CV?
pollster: oh, that's fine, it's ignorable nonresponse
pollster: oh, that's fine, it's ignorable nonresponse
Interviewer: Can you explain this gap in your CV?
Graphic Designer: One of the flaws of convert pdfs to text is it removes kerning and the space between o and w is often tricky
Graphic Designer: One of the flaws of convert pdfs to text is it removes kerning and the space between o and w is often tricky
October 13, 2026 at 12:13 AM
Interviewer: can you explain this gap in your CV?
Person who wrote the layout engine for Microsoft Word: absolutely not
Person who wrote the layout engine for Microsoft Word: absolutely not
github.com/quarto-dev/q...
Meet "lmd", a new "JSX-like" mode in Quarto 2: embedded markdown inside Lua (and vice versa).
Templating will be a whole lot easier, and you still get good syntax errors for both Lua and QMD here.
Meet "lmd", a new "JSX-like" mode in Quarto 2: embedded markdown inside Lua (and vice versa).
Templating will be a whole lot easier, and you still get good syntax errors for both Lua and QMD here.
![Screenshot of qmd file of a feature about to land on q2's nightlies. The file is:
---
title: cells
stuff: [a, b, c, d]
author:
name: Ada
affil:
org: Analytical
---
## Shared state, setup cells, and inline cells
```{lmd}
inner = "more"
greeting = {=[ Hello from embedded markdown with math ($e=mc^2$) and _`{lmd} inner`_ ]=}
count = #meta.stuff
```
`{lmd} greeting`, `{lmd} meta.author.name` of `{lmd} meta.author.affil.org`,
with `{lmd} tostring(count)` things.
A missing key is `{lmd} quarto.metadata.get("missing.key") or "nothing"`, and `{lmd} nil` vanishes.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:ls5433sf4bxpw53d47y7f2of/bafkreihqzrlfwipl3dukl2qvly3gjdcquh444v4beq3ioikjyre5oguofu)
October 12, 2026 at 10:06 PM
github.com/quarto-dev/q...
Meet "lmd", a new "JSX-like" mode in Quarto 2: embedded markdown inside Lua (and vice versa).
Templating will be a whole lot easier, and you still get good syntax errors for both Lua and QMD here.
Meet "lmd", a new "JSX-like" mode in Quarto 2: embedded markdown inside Lua (and vice versa).
Templating will be a whole lot easier, and you still get good syntax errors for both Lua and QMD here.
This might be ultrapure copium, but it feels pretty true right now
I genuinely think that the real moat is giving a fuck.
October 12, 2026 at 9:03 PM
This might be ultrapure copium, but it feels pretty true right now
my kingdom for a "never recommend a v-tube channel ever again" button
October 12, 2026 at 8:21 PM
my kingdom for a "never recommend a v-tube channel ever again" button
youtu.be/zx7Fgi8vN2w?...
The tragedy of most of y’all not speaking Portuguese or not knowing who this is, let me tell you
The tragedy of most of y’all not speaking Portuguese or not knowing who this is, let me tell you
Chico: Bastidores - Comentários na Internet (HD)
YouTube video by Biscoito Fino
youtu.be
October 12, 2026 at 6:39 PM
youtu.be/zx7Fgi8vN2w?...
The tragedy of most of y’all not speaking Portuguese or not knowing who this is, let me tell you
The tragedy of most of y’all not speaking Portuguese or not knowing who this is, let me tell you
What happens when you have a Lua tree-sitter grammar that you can extend _just_ so next to a markdown tree-sitter grammar?
JSX we're coming after you
JSX we're coming after you
Quasiquotation
Send skeet
Send skeet
October 12, 2026 at 5:25 PM
What happens when you have a Lua tree-sitter grammar that you can extend _just_ so next to a markdown tree-sitter grammar?
JSX we're coming after you
JSX we're coming after you
Quasiquotation
Send skeet
Send skeet
October 12, 2026 at 4:31 PM
Quasiquotation
Send skeet
Send skeet
Practice self care. It's Monday and we have a long october ahead of us
Read the figure, go to the replies, and fill your daily block button quota.
Read the figure, go to the replies, and fill your daily block button quota.
October 12, 2026 at 2:09 PM
Practice self care. It's Monday and we have a long october ahead of us
Read the figure, go to the replies, and fill your daily block button quota.
Read the figure, go to the replies, and fill your daily block button quota.
Huh. I long suspected this kind of thing must happen, but I had never seen direct confirmation
Air to Ground Message:
HI.DUE TO OVERWEIGHT DEPARTURE WE LEFT 10 PIECES OF LUGGAGE IN ALC. CAN U CONFIRM HOW THESE PAX ARE RECEIVING THEIR LUGGAGE+IF THEY WILL BE COMPENSATED.THX XXX/XXXX
Area: Madrid, Spain
Type: Airbus A319
A: #a0c3bc7be66
F: #fcb0f2ea97b
HI.DUE TO OVERWEIGHT DEPARTURE WE LEFT 10 PIECES OF LUGGAGE IN ALC. CAN U CONFIRM HOW THESE PAX ARE RECEIVING THEIR LUGGAGE+IF THEY WILL BE COMPENSATED.THX XXX/XXXX
Area: Madrid, Spain
Type: Airbus A319
A: #a0c3bc7be66
F: #fcb0f2ea97b
October 11, 2026 at 5:44 PM
Huh. I long suspected this kind of thing must happen, but I had never seen direct confirmation
taking music seriously made me notice one big meta-skill
if you're going to make the move from appreciation to performance, you better figure out how to enjoy the struggle.
That's not out of some vague stoic sense; it's just that the ratio of time spent struggling vs performing is like 20-50:1
if you're going to make the move from appreciation to performance, you better figure out how to enjoy the struggle.
That's not out of some vague stoic sense; it's just that the ratio of time spent struggling vs performing is like 20-50:1
October 10, 2026 at 4:24 PM
taking music seriously made me notice one big meta-skill
if you're going to make the move from appreciation to performance, you better figure out how to enjoy the struggle.
That's not out of some vague stoic sense; it's just that the ratio of time spent struggling vs performing is like 20-50:1
if you're going to make the move from appreciation to performance, you better figure out how to enjoy the struggle.
That's not out of some vague stoic sense; it's just that the ratio of time spent struggling vs performing is like 20-50:1
By far my least favorite Zed feature is the automatic filetype detector. It triggers mid-typing and changes the meaning of keyboard actions: you're typing in a plain-text document and Zed decides to flip to Markdown mode.
So you end up having to type while staring at the status line.
Zed, _why_.
So you end up having to type while staring at the status line.
Zed, _why_.
October 10, 2026 at 3:35 PM
By far my least favorite Zed feature is the automatic filetype detector. It triggers mid-typing and changes the meaning of keyboard actions: you're typing in a plain-text document and Zed decides to flip to Markdown mode.
So you end up having to type while staring at the status line.
Zed, _why_.
So you end up having to type while staring at the status line.
Zed, _why_.
Ok, *that* was a fun Dark Matter episode
October 10, 2026 at 2:50 AM
Ok, *that* was a fun Dark Matter episode
NEW YOON HA LEE SPACE OPERA THIS IS NOT A DRILL NEW YOON HA LEE SPACE OPERA
seriously. If you haven't read the Machineries of Empire series... ooh boy are you in for a treat
seriously. If you haven't read the Machineries of Empire series... ooh boy are you in for a treat
just finished reading Code and Codex by Yoon Ha Lee (new! Yoon Ha Lee! space opera! out this month!) and man. no one else does the combination of indulgent (complimentary) and very, very clever quite so well.
October 9, 2026 at 2:11 PM
NEW YOON HA LEE SPACE OPERA THIS IS NOT A DRILL NEW YOON HA LEE SPACE OPERA
seriously. If you haven't read the Machineries of Empire series... ooh boy are you in for a treat
seriously. If you haven't read the Machineries of Empire series... ooh boy are you in for a treat
rip Deno ig, I'm happy we're moving most of everything to Rust
October 9, 2026 at 2:00 PM
rip Deno ig, I'm happy we're moving most of everything to Rust
Reposted by Carlos Scheidegger
This is wild - somebody did a deep dive into the real stories behind this famous XKCD:
sheets.works/data-viz/hol...
sheets.works/data-viz/hol...
October 8, 2026 at 4:05 PM
This is wild - somebody did a deep dive into the real stories behind this famous XKCD:
sheets.works/data-viz/hol...
sheets.works/data-viz/hol...
Reposted by Carlos Scheidegger
I should’ve subscribed to this labeler a long time ago
October 7, 2026 at 11:10 PM
I should’ve subscribed to this labeler a long time ago
wait, Unique Games is in that OAI proof dump? WHAT
October 7, 2026 at 8:21 PM
wait, Unique Games is in that OAI proof dump? WHAT
Reposted by Carlos Scheidegger
Expect to see a lot more things like this
![Hacker news comment:
jboggan 12 hours ago | root | parent | prev | next [-] I went back to that Fable chat and showed it this new preprint. It coded up the new constructive algorithm and ran it against the existing test suite, that looks good at least.
It has been super helpful in delineating where the crucial concept came from. The proof is rather simple as graph theory proofs go, but it does seem to use some constructions that would only seem obvious if you had serious physics experience with partition function and calculating energy states that cancel out. *It's not a wholly alien bolt from the heavens, but I can also see how there hasn't been a human being with the broad theoretical physics knowledge combined with the deep graph theory experience in planar graphs to come up with this idea.* (emphasis mine) I don't know, I'm looking for precedents of this formulation and some old papers of Penrose counting the number of edge colorings of this same graph type are coming up, the line of argument at least rhymes.
But I agree with the thought that this sort of progress should not be siloed inside those companies. I propose a tax so that every slop cannon AI video pays for another hour of compute time for advancing mathematics.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:p572wxnsuoogcrhlfrlizlrb/bafkreiae4n5n7qedkgaiuomuvtj3jplg3njoiyulijogc7zsxkpn23gzei)
October 7, 2026 at 5:59 PM
Expect to see a lot more things like this