Static type checking for React code across DOM and native platforms.

• ›Four renderer options cover standard DOM, browser-specific code, React Native, and Fabric environments
• ›Run yarn flow with optional renderer argument; use yarn flow-ci for comprehensive but slower checks
• ›Reports type errors with file locations to help identify and fix issues quickly
• ›Watch for common pitfalls: missing renderer specification, unexamined $FlowFixMe suppressions, and incorrect type imports