Leaning Into the Coding Interview: Lean 4 vs Dafny cage-match

Back in grad school, I ran a directed reading group for undergrads interested in the intersection of systems and PL research. Most weeks we just discussed papers, but the final session of the semester was special: I’d tell them, “Okay, all term you’ve seen what others have built; today, let’s write and verify some programs of our own!” So, we’d sit in a conference room with a text editor and a box…