Core Principle
UI Intent and Business Authority
UI should declare operational intent, while business authority must remain in business logic and operational contracts.
Architecture
Core Principle
Runtime Boundaries and Operational Safety
Operational safety in business UI depends on a clear runtime boundary between screen intent and execution structure.
Core Principle
Form State and Long-Lived Interaction
Form state in business UI is not just input values. It is a long-lived working context that breaks when several mutation paths redefine it without one design rule.
Core Principle
Screen Lifecycle and DOM Stability
In long-lived business UI, the screen is a working surface with a lifecycle, not a transient render.
Core Principle
HTML and CSS as One Unit
The first structural problem Cotomy set out to solve: CSS as a boundary issue, not a styling preference.
