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Carlos Scheidegger

@cscheid.net

3.4K followers 480 following 2K posts

Principal Engineer at Posit (fka RStudio), technical lead at quarto.org Learning Brazilian Choro and the 7-string guitar

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Reposted by Carlos Scheidegger

Faine Greenwood @faineg.bsky.social · 11h

I’m cool with using LLMs for stuff like “writing regexes” but why would I use them to do things my brain actually likes doing and finds rewarding?

why would I outsource eating a really good hamburger to someone else? that’s my fucking hamburger

Carlos Scheidegger @cscheid.net · 10h

the best moral proof that p!=np is "if p=np were true, the interleaving algorithm would theoretically be sound. Obviously the gods aren't *that* cruel. QED"

Carlos Scheidegger @cscheid.net · 10h

the interleaving algorithm has joined the chat

(If p=np, you can run every turing machine in parallel via interleaving (by a triangular interleaving trick), some fancy encoding. Then, of them will come back with your result in polynomial time. This interleaving only adds a constant factor.)

Carlos Scheidegger @cscheid.net · 13h

the Brazilian Portuguese obsession with jamming vowels together is horrendous^Wfun: "piauiense" is a real word

Carlos Scheidegger @cscheid.net · 16h

these cross-language behavioral differences are so weird.

Claude fucks with my JS test cases a lot, TS a little, Rust not at all. It hasn't dared write `unsafe` in anything it's given me so far. It could, but it doesn't. That's a good thing, but it's weird!

Carlos Scheidegger @cscheid.net · 18h

I mean…

Just a completely ridiculous diagram from the infamous pepsi design doc

Carlos Scheidegger @cscheid.net · 18h

Time cube is a classic but hear me out

Military ppts
That Pepsi concept doc

Carlos Scheidegger @cscheid.net · 19h

scambot follows arrived on Strava. What a world.

Carlos Scheidegger @cscheid.net · 1d

I'm trying out tailscale for the first time.

It turns out we still can build good software! Really impressive.

Carlos Scheidegger @cscheid.net · 2d

Yeah it’s a real bad look. The blacksky experiment is v interesting though, I hope this is at least a serious chance to test the robustness of atproto and the surrounding social dynamics

Carlos Scheidegger @cscheid.net · 2d

Ah sorry. DMs are open (genuinely 100% not a request or challenge, just a statement)

Carlos Scheidegger @cscheid.net · 2d

I just wanted to say “hey, consider that you might’ve overreached in this specific case, and that this road is strewn with radicalized people who one day eventually stopped being reasonable”. I’ll crawl back into my lurker hole now. 2/2

Carlos Scheidegger @cscheid.net · 2d

In disclosure, I met and (briefly) interacted with Timnit personally and professionally very early on, and I think “famous for getting fired” specifically is inaccurate.

I understand this is a personal thing, but i don’t think discussing any of this in a public forum will elucidate much 1/2

Carlos Scheidegger @cscheid.net · 2d

I think you hold a sufficiently interesting point of view and again, you do you and if this feels to you like you want to mute or block me, ok. But I’m just telling you this in case no one else thinks to nudge you away from this attractor.

Carlos Scheidegger @cscheid.net · 2d

Hey so I’ve followed you for a long time and whatever I’m mostly a rando. But that’s just genuinely not true, and I hope you one day you come to realize that. Like, you do you. But I do worry you’re going to go deeper into the posterdom problem of not walking back something you once could.

Carlos Scheidegger @cscheid.net · 2d

Here it is:

Carlos Scheidegger @cscheid.net · 2d

(Andrie; damn autocorrect) @grrrck.xyz caught some of it, but I can’t seem to make Bluesky post it

Carlos Scheidegger @cscheid.net · 2d

Seriously though, Andries and i brought instruments to posit::conf this year (clarinet, guitar) and it was the best. I’ve been trying to convince more folks to do it!!

Reposted by Carlos Scheidegger

Evan Bernick, a finite mode with a smol hooman and a lorg floof @evanbernick.bsky.social · 2d

This is an image from 1992, in case you were curious

CNN @cnn.com · 3d

"President Donald Trump and his top aides are using the word 'insurrection' more frequently to describe anti-ICE protests in places like Portland," writes Zachary B. Wolf. https://cnn.it/4pWYmzr

Carlos Scheidegger @cscheid.net · 3d

Recent Nikons have this, but apparently it’s not going entirely smoothly: petapixel.com/2025/09/22/n...

Nikon Can't Fully Solve the Z6 III's C2PA Problems Alone

Nikon is doing its best but some issues concern C2PA software itself.

Reposted by Carlos Scheidegger

Mike Sowden @mikeachim.bsky.social · 3d

Damn. This is amazing. £325 per week, paid monthly, for 3 years - and the result was a profit for the Irish economy:
www.citizensinformation.ie/en/employmen...

Post from Threads user rodneyowl: "Ireland has declared the Basic Income for Artists scheme permanent. This will be officially announced in tomorrow’s budget. Details to follow. Congratulations to all who fought for it and the present and future artists of all sorts in Ireland. That includes me 👌We’re just comin to the end of a 3 year pilot scheme. It’s been a roaring success. For every €1 paid out to the 2000 participants, the government got €1.46 back. Can’t argue with that. Other countries are already taking note."

Carlos Scheidegger @cscheid.net · 3d

(Seeing this now - yeah, GitHub discussions is the right place to ask, esp because you can share more details about your setup)

Carlos Scheidegger @cscheid.net · 3d

Case in point: Posit paid me this morning to suffer through learning an extremely obscure corner of a parsing library so that you all (eventually!) don't suffer from weird markdown parsing issues.

(hi tree-sitter external scanners, you're too complicated even for Claude. But I beat your ass.)

Hadley Wickham @hadley.nz · 7d

Three phrases that capture some of the tidyverse team culture:

Everybody takes out the trash

We suffer so users don’t have to

If it hurts, do it more often

Carlos Scheidegger @cscheid.net · 3d

with that said, this is my screen rn

Screenshot of claude code trying to debug a tree-sitter parser.

Carlos Scheidegger @cscheid.net · 3d

Watch out, you’re going to soon be at the edge of quantum physics or whatever the hell that guy was on about