I think the AI tooling is, if not completely solving sandboxing, at least making the default much better by asking you every time they want to do something and providing files to auto-approve certain actions.

Package managers should do the same thing

Another layer of AI tooling is the cost of spinning up your own version of some libraries is lowered and can be made hyper specific to your needs rather than pulling in a whole library with features you'll never use.

> at least making the default much better by asking you every time they want to do something

Really? I thought 'asking you every time they want to do something' was called 'security fatigue' and generally considered to be a bad thing. Yes you can concatenate files in the current project, Claude.