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docs/architecture/adr/0002-ui-wrap-material-components-in-atomic-design-system.md

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+# UI - Wrap Material Components in Atomic Design System
+
+- Pull Request: [#7221](https://github.com/thunderbird/thunderbird-android/pull/7221)
+
+## Status
+
+- **Accepted**
+
+## Context
+
+As we continued developing our Jetpack Compose application, we found a need to increase the consistency, reusability,
+and maintainability of our user interface (UI) components. We have been using Material components directly throughout our
+application. This lead to a lack of uniformity and increases the complexity of changes as the same modifications had to
+be implemented multiple times across different screens.
+
+## Decision
+
+To address these challenges, we've decided to adopt an
+[Atomic Design System](../design-system.md) as a foundation for our application UI.
+This system encapsulates Material components within our [own components](../../../core/ui/compose/designsystem/),
+organized into categories of _atoms_, _molecules_, and _organisms_. We also defined _templates_ as layout structures
+that can be flexibly combined to construct _pages_. These components collectively form the building blocks that we are
+using to construct our application's UI.
+
+## Consequences
+
+- **Positive Consequences**
+  - Increased reusability of components across the application, reducing code duplication.
+  - More consistent UI and uniform styling across the entire application.
+  - Improved maintainability, as changes to a component only need to be made in one place.
+- **Negative Consequences**
+  - Initial effort and time investment needed to implement the atomic design system.
+  - Developers need to adapt to the new system and learn how to use it effectively.
+  - Potential for over-complication if simple components are excessively broken down into atomic parts.
+