1/3 New Lean use case: Veil, a multi-modal verification framework for distributed protocols from George Pîrlea, Vladimir Gladshtein, Elad Kinsbruner, Qiyuan Zhao, and Ilya Sergey at NUS.

I don't have your PL academic pedigree, so I keep rediscovering common wisdom.

Are paper rejections really that bad? My papers get read by ~3 people on average. Each rejection means a resubmission, which means 3 more readers. After 4 rejections, that's double-digit readership.

I knew this is slop, but I wished it weren't.

New on "Proofs and Intuitions": Verifying Move Borrow Checker in Lean: an Experiment in AI-Assisted PL Metatheory.

proofsandintuitions.net/2026/03/18/m...

The gist: I formalised Move's type system in Lean: 39KLOC, under a month, with Claude. Person-years in PL research just became person-weeks.

Thank you, Rachit!

New post on "Proofs and Intuitions": Verifying Distributed Protocols in Veil.

We take a tour of Veil, a Lean-based verification framework that combines TLA+-style model checking with formal proofs and enables AI-powered invariant inference.

proofsandintuitions.net/2026/02/09/d...

Implementing proof systems in Lean in 2026 be like

My research lab is launching a new blog, where we will share thoughts and tutorials on formal methods, mechanised proofs, PL, and more.

proofsandintuitions.net

First post: verifying imperative programs in Lean 4 with Velvet, using symbolic automation and AI-assisted proving.

Claude Code and Aristotle are my two new favourite backend solvers for auto-active program verification in Lean.

AI is the new SMT.

Weird. Let me check with the SIGPLAN AV Team.

Revisiting CS101.

Had a fantastic week teaching Programming with Proofs in Lean at Neapolis University Pafos.

It was great to introduce NUP students to program verification with Veil and Velvet, having many insightful discussions along the way. Excited to see what projects they'll develop next!

FM-Fuzz: Continuous Fuzzing and AI-based Bug Fixing for Formal Methods at The University of Manchester on FindAPhD.com PhD Project - FM-Fuzz: Continuous Fuzzing and AI-based Bug Fixing for Formal Methods at The University of Manchester, listed on FindAPhD.com

We are hiring!

Suzanne Embury and I are looking for a talented Ph.D. student 👩‍🎓👨‍🎓 to join an exciting, high-impact project on automated testing and bug fixing of Formal Methods tools.

www.findaphd.com/phds/project...

Spent the last couple of days porting my program verification class from Dafny to Lean via Loom/Velvet, and it just works!

Whenever the SMT solver can’t fully prove a program correct, Lean’s aesop and grind take care of the remaining goals.

Grokipedia is alright.

Outdoor Activities - SPLASH 2025 Latest Announcements Information for presenters at NUS (Sunday) and at MBS (Monday-Saturday) is now available! Official tag for social media posting about the conference is #icfpsplash25 If you’re pl...

A reminder that we will have another @icfp-conference.bsky.social/SPLASH nature walk planned for tomorrow. Consider joining if you are (still) in Singapore! 2025.splashcon.org/attending/ou...

Safe travels!

The tunes of Rocq’n’Roll. #icfpsplash25

FARM Performance is about to start! #icfpsplash25

Lots of folks in the OxCaml tutorial! #icfpsplash25

@icfp-conference.bsky.social

Had a nice day co-hosting the first hike of #icfpsplash25 Outdoor Activities track with Yibo🙌

Walking in the forest 🌳
Seeking special animals (monkeys🐒, lizards🦎, colugos🦇, and even a snake🐍!)
Enjoying the networking🥳

It seems the first hike as part of @icfp-conference.bsky.social/SPLASH went well! A shoutout to @ningkeli.bsky.social and Yibo DONG (as well as my wife, Ting), who guided the participants on this walk. I could unfortunately not participate, as I had to travel abroad due to an urgent issue.

1st coffee break of the week

many many more to come

#icfpsplash25

ICFP/SPLASH is starting now!! See you all at NUS today — #icfpsplash25

UBC Computer Science makes waves at programming language conference ICFP/SPLASH

The UBC Software Practices Lab is heading to #icfpsplash25! 4 ICFP/OOPSLA talks, 1 SPLASH-E, 5 talks at associated workshops... check it out: www.cs.ubc.ca/news/2025/10...

A beautiful day to stop in at the Singapore Botanic Gardens and the National Orchid Garden before ICFP/SPLASH! #icfpsplash25

Venue NUS School of Computing - ICFP/SPLASH 2025 Latest Announcements If you’re planning to attend FARM Performance and have a dinner on NUS campus, please, check this illustrated guide with directions to YST Conservatory and NUS UTown food courts....

ICFP/SPLASH'25 is starting tomorrow!

Attending Sunday workshops and FARM Performance at #icfpsplash25? Make sure check out our illustrated guide on getting to NUS Conservatory and dining options on campus:

conf.researchr.org/venue/icfp-s...

I am thrilled to announce Velvet: a new foundational multi-modal verifier for imperative programs in Lean.

Velvet unifies execution, testing, automated and interactive proofs; and is itself proven sound.

💻 github.com/verse-lab/loom
📄 verse-lab.github.io/papers/loom-...

I might drop by.