Why Bounded Behavior Beats Magic Prompts

Frontier models are not deterministic, and pretending otherwise is how teams get burned. The skill is not writing a perfect prompt; it is bounding behavior: defining what ships, what is gated, and what gets written back, while leaving the path free. This is the same way a senior engineer manages a junior - a clear contract, hard gates, and freedom in the middle. In this article we walk through what that looks like in a real Playwright project.