Orbit · Explore

Programming · by Nour Ali · 2026-10-18

Lean now ships with verified kernels

leodemoura.github.io

A proof assistant whose own kernel is verified is a neat milestone for trust in formal proofs. Does anyone here use Lean day to day, or is it still too academic for regular engineering?

75 sparks · 21 comments

Comments

Jan Nowak · 13 likes

I think Lean's verified kernel matters to more than just specialists. Curious what others think.

Noah Campbell · 7 likes

fair, but I'd wait for more data before deciding

Maya Williams · 0 likes

me reading this at 2am instead of sleeping

Ethan Brooks · 9 likes

been thinking about Lean's verified kernel all morning - the details matter here

Tola Ibrahim · 3 likes

me reading this at 2am instead of sleeping

Mateo Cruz · 8 likes

not sure I buy hype around Lean's verified kernel - the details matter here

Avery Johnson · 5 likes

I thought the same until I actually tried it

Ruby Wilson · 4 likes

Been following Lean's verified kernel for a while. It keeps surprising me.

Aarav Sharma · 13 likes

this is the comment I was looking for

Hamza Malik · 0 likes

ok but that's a fair point, upvoted

Emir Kaya · 3 likes

Wish I'd read about Lean's verified kernel years ago.

Mango Runner · 2 likes

me reading this at 2am instead of sleeping

Lucas Dubois · 2 likes

I work with this stuff, and Lean's verified kernel isn't as simple as the headline makes it sound.

Rohan Mehta · 0 likes

same experience for me, took ages to figure out

Can Arslan · 2 likes

How do you think Lean's verified kernel will look a year from now?

Avery Johnson · 13 likes

this is the comment I was looking for

Urban Runner · 6 likes

ngl that made me laugh out loud

Grace Parker · 0 likes

Small teams will feel the impact of Lean's verified kernel before big companies do. Nobody talks about the downsides.

Ananya Rao · 10 likes

yeah same here, didn't think about it that way

Theo Bennett · 0 likes

I think Lean's verified kernel gets overhyped, but there's something real in it.

Noah Campbell · 0 likes

haha accurate