What rules should be included in the regulations for web developers?

Question

Work organization

Good afternoon. Faced with the topic of the need for regulations, otherwise the zoo began.
When creating custom websites. on Laravel, Vue.
Problems
Either one Laravel project uses the built-in query builder, or Eloquent or something else. Then some modules self-written by the developer appear in the final project, which eventually turn out to be with bugs and are finalized during working hours as a result, since the project is tied to them, etc. Assembly for the front, too, who is what much.
Either one has Linux, the other has types, then the docker works, then it doesn’t, one container does this, the other does it differently. Then self-written scripts appeared again, because it was more convenient / more familiar for someone. etc. That complicates further support by other people.
Question
Since there are developers in the state and sometimes people from freelance are involved and a remote worker is planned.
I would like a regulation that is not tricky for 10 sheets. And for starters, a set of simple rules. Clear and simple, to prevent major problems. And then it makes no sense to go through all the rake that someone has already stepped on for many years, but I couldn’t google it.
How to regulate which third-party modules can be used and which cannot, etc.
started writing.
1. We use the functionality built into the Framework as much as possible, as well as SQL query builders. Like Eloquent or built-in query builder. Use the built-in template engine.
2. You cannot use your self-written modules in projects.
but so far I have encountered such problems, but I think there are many more, please share.

Answer 1

Either one Laravel project uses the built-in query builder, or Eloquent

one does not interfere with the other. here it is necessary to proceed from the tasks.

We use the functionality built into the Framework as much as possible, as well as SQL query builders. Like Eloquent or built-in query builder.

It's right.

Use the built-in template engine.

this is not clear.

You can not use your self-written modules in projects.

this is also not clear.
In fact, the entire regulation boils down to two things:
1. generally accepted code-style and documentation requirements.
2. anything that the team considers acceptable.

Answer 2

You need a code review and a discussion of the proposed solution when setting the problem.
Regulations, as a rule, no one reads)