Zero placeholders is the house rule that governs everything else. No lorem ipsum. No dummy data. No 'coming soon.' No screenshot of a feature that doesn't run. If it ships, it's real.
Placeholders feel like progress and aren't. They let a project look finished while quietly deferring the hard part. Worse, they accumulate — a page full of 'TODO' is a page full of decisions nobody made and work nobody did.
The rule forces a different sequence: build the real thing first, then show it. It's slower to demo and faster to trust, because there's nothing behind the curtain to walk back later.