Ensure API design follows consistent patterns for naming, typing, and composition to improve developer experience and maintainability. **Key principles:** 1. **Use fully qualified names in deprecation messages** - Include the full path like `MetaArgs.loaderData` instead of just `loaderData` to provide clear migration guidance. 2. **Prefer type-only imports for types** - Use `import type { ServerBuild }` instead of `import { ServerBuild }` when importing only for type annotations. 3. **Use consistent generic parameter naming** - Prefer descriptive names like `Context` over abbreviated forms like `C` for better readability: ```typescript export interface LoaderFunction { (args: LoaderFunctionArgs): Promise | DataFunctionValue; } ``` 4. **Choose appropriate type definitions** - Use `export type` for simple function signatures instead of interfaces when no extension is needed: ```typescript export type HeadersFunction = (args: HeadersArgs) => Headers | HeadersInit; ``` 5. **Build composable APIs** - Design new functions to leverage existing ones rather than duplicating logic: ```typescript export const redirectWithReload: RedirectFunction = (url, init) => { let response = redirect(url, init); response.headers.set("X-Remix-Reload-Document", "true"); return response; }; ``` 6. **Preserve request context appropriately** - When creating new request objects, copy relevant properties from the original rather than creating minimal requests: ```typescript let loaderRequest = new Request(request.url, { body: null, headers: request.headers, method: request.method, redirect: request.redirect, signal: request.signal, }); ``` These patterns improve API discoverability, reduce confusion during migrations, and create more predictable interfaces for developers.