How do I shape roles and culture as my team grows?

A small team runs on trust and proximity. Everyone sees everything, so roles blur and it works fine. As you grow, that same blur turns into confusion, and the culture that formed by accident stops holding. What got you here will not carry you forward, and that is normal. Roles feel hard to shape because you are afraid of boxing people in. But clear roles are a kindness. They tell each person what is theirs to own and what they can let go of. Culture is the same. If you do not name what you value, the loudest habits become the culture by default. Pick the one place where ownership is fuzziest right now and make it clear this week. Who decides, who does, who is informed. One clean line. Then do the next one. Culture is built in these small decisions, not in a poster.