Maximize Reuse

We respect the DRY principle. Whenever possible, instead of duplicating yourself, find a way to centralize things and reuse them. Apply this to JavaScript, CSS, JSX, and all other files. Most existing places already follow DRY; reuse their shared abstractions. For new places that need centralization or a new shared abstraction, get approval first. Define each shared rule, path, convention, or calculation once in the most appropriate core abstraction, and reuse it everywhere instead of duplicating it.