Its Conway's Law, Your code organization is a reflection of your engineering teams organization.
The number of repos you have should roughly be equal to how many autonomous engineering "groups" you can divide into that work largely independent of other groups. Anything a group touches should probably be in the same repo as everything else that the same group touches.
The number of repos you have should roughly be equal to how many autonomous engineering "groups" you can divide into that work largely independent of other groups. Anything a group touches should probably be in the same repo as everything else that the same group touches.