Sanity Plugin Best Practices

Conventions for authoring plugins in the sanity-io/plugins monorepo, captured as concrete anti-patterns and the preferred approach. These rules encode what the existing plugins already do so new and migrated code stays consistent, fast, and theme-aware.

This complements the broader React performance guide in the vercel-react-best-practices skill — read that for general React/Next.js patterns, and this skill for plugin-specific guidance.