I am looking for some advice on common practices when doing a programming job for someone else.

So i took a pay-per-hour job from an acquaintance who wanted me to develop a little tool in a web environment. I finished the tool in 16 hours and now its time for me to hand it over. I will probably do more jobs like this for him in the future.

Is it common to add the guy as a collaborator on my git repo, even when there will be code from future projects on there, that will be in-progress and not yet paid for?

Should i develop on another repo/fork and only push 'public' code to a shared repo once my work is finished?

Should i share source code at all, or only share compiled/deployable project folders?

I am not familiar with the common practices in this aspect of the programming business; this was the first programming job i got.

Thank you for all your (future) replies!

Finding a part time job as a dev and have 80% of my ECTs as a CS student

Anybody here know that shitty service called Birthday Reminder? Yeah? Fuck them.

Never signed up for the bullshit, but because some kiddo's I was in class with 10+ years ago (I think it started when i was ~12 yrs old) did, I keep on getting their spam. They have an unsubscribe button in their emails, directing me to a page that says I can only unsubscribe if I log in.
FUCK YOU.
I NEVER SIGNED UP FOR YOUR SHITTY SERVICE AND I REALLY DONT WANT TO DO NOW EITHER.

Ofc I emailed them politely to remove both my email addresses from their databases.
And they are politely ignoring me.
Fuck you.

PS yes I know I can mark them as spam, but I prefer just not receiving their shit at all. I have a very clean spam folder.