I do this too, maybe this explains why

the parents job

Trouble is that you send them to school for most of the day, schools aren’t really working with you on this.

I think you’re describing protocols rather than algorithms For a chat program you can look at xmpp, or matrix, both are open protocols for chat apps. You can find info about how they communicate in RFCs or Google “xmpp architecture”

https://en.m.wikipedia.org/wiki/XMPP links to the RFCs for that.