GUI

Proposed Refactor

The mental model of separating data, rules, and rendering—is the cornerstone of scalable and maintainable system design.

Decoupling and Reusability: By extracting the sorting logic into pure, composable "Rule Primitives" (selectedFirst, recentFirst, etc.), you create a library of behaviors. As you correctly pointed out, this logic is no longer trapped inside ThemesCatalog. It can be imported and reused in any component that needs to display an ordered collection: a file explorer, an app launcher, a command palette, and so on. This is a massive win for code reuse and consistency.

Separation of Concerns (SoC): The refactor makes the ThemesCatalog component "dumber" in the best way possible. Its responsibility shrinks to primarily rendering the data it's given (). It no longer needs to know the intricate details of how that data was ordered. This makes the component easier to understand, test, and maintain. The logic for ordering is now explicitly defined and composed, making the behavior itself a first-class citizen of your architecture.

Alignment with neurons.me Philosophy: this aligns with the .me philosophy is key.

Data (themes): The raw nodes in the graph.
State (.me): The access layer that provides the context for transformations (e.g., me.public.ui.theme.history).
Rules (applyCollectionRules): The pure, stateless logic that transforms the data based on the context.
UI (ThemesCatalog): The final projection or "view" of the transformed data.
This structure is not just a "React pattern"; it's a data-flow architecture. You are defining a system where the UI is a predictable result of applying a series of transformations to a set of data, driven by a state graph.