docs(storybook): intro

Author: Kurt Medley

apps/html/stories/Introduction.mdx

@@ -150,7 +150,8 @@ Cedar One is guided by a small set of system-level principles that shape how com
 - **Static by default**: HTML and CSS are preferred over runtime abstractions wherever possible.
 - **Validation before shipping**: Component contracts are enforced during development, not in production.
 - **Usage-driven output**: Builds can generate only the utilities and recipes a project actually uses.
+- **Performance by default**: Smaller bundles, reduced runtime work, and predictable rendering are treated as first-class outcomes of the system.
 
-Together, these principles keep the system portable, predictable, and scalable as platforms and frameworks evolve.
+Together, these principles keep the system portable, predictable, and performant as platforms and frameworks evolve.
 
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