Remix Best Practices (2025-2026 Edition)

This skill outlines modern best practices for building scalable, high-performance applications with Remix, specifically focusing on the transition to React Router v7 and future-proofing for Remix v3.

🚀 Key Trends (2025+)

• React Router v7 is Remix: All Remix features are now part of React Router v7. New projects should start with React Router v7.
• Server-First Mental Model: Loaders and Actions run only on the server.
• "Future Flags" Adoption: Always enable v7 future flags in remix.config.js or vite.config.ts to ensuring smooth migration.
• Codemod Migration: Use npx codemod remix/2/react-router/upgrade to migrate existing v2 apps.

🏗️ Architecture & Data Loading

1. Server-First Data Flow

Avoid client-side fetching (useEffect) unless absolutely necessary.

• Loaders: Fetch data server-side.
• Actions: Mutate data server-side.
• Components: render what the loader provides.