Hallmark is a design skill for coding agents that aims to produce more intentional interfaces. It guides choices around layout, typography, and visual identity, helping a generated page reflect the actual product instead of a generic template.
Give an interface a stronger direction
Use the skill when an AI-built website feels interchangeable and needs decisions that fit its subject, audience, and content.
Improve the design brief
Explore its guidance when you want an agent to reason about the page's structure and visual character before writing the implementation.