> Do you trust 'jump to definition'.

It depends, for some languages 'jump to definition' tools ask the same compiler/interpreter that you use to build your code, so it's as accurate as it gets, and it's not 'best effort'.

It also depends a bit on your project, some project are more prone to re-using names or symbols.

> If I was as quick at opening and reading files as claude code, I'd prefer grep with context around the searched term.

Well, Claude probably also doesn't want to have to 'learn' how to use all kinds of different tools for different languages and eco-systems.