Kyle Kingsbury is not a journalist. He is not an op-ed writer. He is a computer safety researcher. And he has written one of the most compelling, comprehensive accounts of the ongoing hell in Chicago that you could possibly imagine. In under 1600 words. aphyr.com/posts/397-i-...

Eminently reasonable proposed principles for professors’ use of AI, from a student refusinggenai.wordpress.com/2025/08/29/a...

Woah. Have all NSF-awardees been signing this for the past year or so?

First they took my em-dashes away, now this. Am I a robot?? I have so many captchas to apologize to

ATTN @icfp-conference.bsky.social attendees: before entering airport security, check out the Jewel indoor rainforest! Pretty striking even when the waterfall isn’t running 😳

Take notes, this will be on the exam!

Medical science is so biopunk. Couple weeks ago I paid $3000 to upgrade my snout. Def better than my starting loadout: + increased O2 intake + buffs to endurance and mental acuity + regain more health from sleep

Finally making plans to attend SPLASH in Singapore next month! First time a conference "travel etiquette" page has warned me about receiving the Death Penalty 😄😄😄😰

Choreographic λ-calculi are a hot topic. You might know models like Pirouette (POPL 2022) or Chorλ (ICTAC 2022). But did you know researchers don't agree what the "right" semantics should even be? Our ICFP pearl builds a tiny calculus from scratch, and shows the right semantics is... non-strict!?

Hey CS instructors and TAs, what’s your policy on students using LLMs? (A) not allowed (B) sometimes allowed (C) required or encouraged

I gave a talk at PLDI '25 about the future of Actor GC in Apache Pekko - with applications to #akka #erlang and #elixir. It's the culmination of my 6+ year PhD at UIUC, and I tried to make the talk really fun and easy to follow :) Check it out here: www.youtube.com/live/lGM37Z3...

If you're reading this post, you're probably procrastinating. Why not watch my PLDI talk, "CRGC: Fault-Recovering Actor GC in Apache Pekko"? It goes live in 1 hr (11:30 KST). I tried to make it entertaining 🙂 #akka #erlang #elixir www.youtube.com/live/lGM37Z3...

Sometimes it takes me all day to get nothing done

Under the hood, #Erlang does a lot of tricks to improve performance. The fields of this C struct are modified by different CPUs. If you packed fields normally, modifications by one CPU will invalidate the cache of another CPU. So the devs added padding, and now fields are on different cache lines!

TIL monads give you some compiler optimizations for free! E.g. gcc has the semantics of assignment built-in, so it optimizes away `int y = x; x = y; ...`. If you write it in Haskell with the State monad, GHC will delete that code using beta/eta reduction. Even though GHC doesn't know about State!

I find Moggi’s early papers about monads confusing. It’s hard to tell what exactly he was envisioning. This paper does a great job filling in the gaps for a modern audience! Monads + dependent types are such a powerful way to define PLs and prove properties about them. dl.acm.org/doi/pdf/10.1...

There’s a lot of parallels b/w Category Theory and Music Theory! 1) It’s descriptive, not prescriptive 2) You don’t need it to do good work but many find it useful 3) It’s easy to say “people who know more than me are snobs, people who know less are fools” 4) Novices use it to discredit other areas

This essay about feminism in PL asks some really tough questions! It’s making me wonder: what should the purpose of PL research be, anyway?? Are we trying to “solve problems”, “make the world a better place”, “expand knowledge”, or…? www.felienne.com/wp-content/u...

I don't think DOGE could cut budgets at this pace without the help of LLMs. Is this the first time AI has been used to accelerate a political project? Reminds me of what the invention of machine guns did to the first world war.

Idea to create a rival podcast to Type Theory Forall, focusing on untyped programming languages like lisp and prolog It would be called "Judgment Free Zone" and the logo would obviously be (⊬)

Once more unto Denmark! 🇩🇰

Has anyone else had the embarrassing realization that you didn’t really understand a fundamental idea in your research area? Before this year, I don’t think I could explain what a formal model was for ._.

Orrrrr you can keep calling things transpilers, and continue doing daring and beautiful things with language because it makes the pedants upset :)

Does anybody else hate working with build tools like SBT and Maven? I just can't believe they need to be so hard to learn and also so slow at their main job - compiling code. Is there any PLT research about build systems? Related article about slow build tools: mill-build.org/mill/compari...

I keep trying to migrate this one and the video gets corrupted. It’s just that powerful! #FunctionalProgramming #Haskell #OCamel #Programming

I met Valentino Picotti when I supervised his bachelor project and today I'm excited and proud to share that he successfully defended his PhD dissertation "Language Support for #Microservices Development". It's been a pleasure to work with him and be his supervisor together with Fabrizio Montesi.

Instantly, utterly, madly in love with #Lean4. I haven't felt this way since learning Elm in undergrad. Everything from the language to the tooling is so thoughtfully designed!

Not as good but, (E)ventually consistent / (I)dempotent (S)ynchronous / (N)onblocking (F)ailure detectors / (T)imeouts (P)axos / (J)ust wing it

I'm a huge fan of Brendan Gregg's work on observability. If you've heard a bit about BPF tools and want to know how they work, you have to check out this talk: www.youtube.com/watch?v=_5Z2...

Handy trick for those toiling in the UNIX mines. Instead of: 1. Running `ps aux | grep java` 2. Copying the PID 3. Running `mycommand ... PID` Use pidof! Just run `mycommand ... $(pidof java)`.

Hi bluesky! I'm a research guy circulating around the US and Denmark. Here's a video I made about some of my recent work on PL/concurrency/distributed systems :) www.youtube.com/watch?v=23y1...

Hello 🦋 Happy to see many familiar faces around. Wasn't easy to find all of you (I probably missed many), so I created a starter pack to make it easier to (re)connect and nerd out about distributed systems, programming languages, and container stuff. Let me know who I missed! go.bsky.app/U1hZhum