In need of a bash wizard

Are you good at writing bash? I could use some help refactoring Biome. A few things in particular that need updating:
- Change local variables from uppercase to lowercase (and use the `local` keyword).
- I'm pretty sure the convention is to exit with a different error code for each type of error. Right now, if there's an error, the error code is 1.
- There's a lot of code like `echo hello world` - this should really be `echo "hello world"`.
- Anything else that I missed?

Thanks for the help!