We signed an agreement. Why doesn't it feel solid yet?

You wrote things down. Equity, roles, decision rights. Good — most people skip this and pay for it later. But you already sense the paper isn't the whole thing, or you wouldn't be here. Here is what the paper cannot do. It cannot tell you what to say when your cofounder makes a call you'd have made differently. It cannot make you bring up the resentment you're quietly collecting. It cannot force the hard conversation you've been postponing because the venture is going well enough that you don't want to disturb it. The partnership is not the document. It is the sum of every moment you chose honesty over comfort, or didn't. Most founding teams don't break on a single betrayal. They erode — one unspoken disagreement at a time — until the trust the agreement assumed is no longer there.