state-in-url

Set up useUrlState in Astro (state-in-url/astro) inside React islands, and keep state in the URL on pages with no client framework at all through encodeState/decodeState in the frontmatter. Covers the searchParams island prop for a matching server render, sharing state between islands, and the replace/push choice with no client router involved. Load this skill when the project is Astro, with React islands, Preact islands (compat), or no client framework at all.