Rspack Best Practices

This is a configuration and optimization guide for Rspack, the Rust-powered bundler that's becoming a faster alternative to webpack. It covers the essentials: setting up rspack.config.ts with defineConfig, choosing between built-in CSS handling versus legacy loaders for webpack migrations, and profiling bottlenecks with RSPACK_PROFILE or Node's cpu-prof flag. The real value is in the opinionated choices, like preferring Rspack's built-in plugins over JavaScript alternatives and keeping rule conditions explicit. Use this when you're starting a new Rspack project, migrating from webpack, or troubleshooting slow builds. The guidance on asset modules versus legacy loaders and the security note about not publishing source maps are especially practical.

Install to Claude Code

npx -y skills add rstackjs/agent-skills --skill rspack-best-practices --agent claude-code