Which terms should we include in a co-founders agreement?

Hi everybody,

I would like to know about the contents of a co-founder agreement. We are a team of four: two technical co-founders, one in charge of UX design, marketing, community relations, and one in charge of all business-related activities, accounting, management (me). We - as a team - developed a great idea for a product, for which the two engineers of the team have already created a prototype with which we would like to create our MVP, test market fit, raise first seed round, etc. In order for us to operate as a startup, the first steps will include signing a founders agreement and incorporating. For the founders agreement, what are some must-haves that we cannot afford to ignore? Are there typical pitfalls that could break up the company later?

Thank you!