I’m on the Cajal team - not OP, but happy to answer questions.
The core bet is that Wasm is a good verification target (close to compiled artifacts, many languages target it), and Lean is the right place to do verification.
Super interested in hearing from people working with Lean, compilers or other Wasm verification frameworks (eg Iris-Wasm).
What other verification targets did you consider?
Cool. I've been working on a compiler for a subset of Lean that targets WASM. The compiler is implemented in Lean.
https://github.com/jsmorph/leanexe
I think I managed to use Talos to prove the WAT generated from an example LeanExe program is correct. ?
https://gist.github.com/jsmorph/275a15dc21af037e1d02a1b433be...
Fun.