Here's an IDE feature I think should exist:
A *random* file finder!
Rather than doing a range of static analyses (typical lint issue count, typical number of functions per file), just randomly sample!
It's less overwhelming and prevents recent feature bias to code cleanliness.
Cute idea (in a rather dramatic blog post): randomly generate strings for PL keywords, and apply the same transformation to your source code.
This prevents code injection:
https://blog.polyverse.io/introducing-polyscripting-the-beginning-of-the-end-of-code-injection-fe0c99d6f199
(I suppose you could brute force, and they don't say if it breaks eval.)
Quickcheck is great for finding interesting bugs, but it's a little sad when your tests randomly go green inappropriately.
