Breaking changes (v3.0.0)

• Peer Nuxt ^3.16 \|\| ^4 (primary Nuxt 4 tooling)
• Peer Content ^2 \|\| ^3 (not v1)
• Module config key: nuxtToc (was not this key on older majors)
• Removed CustomQuery-style internal query component
• Dual playground layout under playgrounds/
• Development package manager: npm (package-lock.json)
• Published package depends on @nuxt/kit >=3.16 <5 (Nuxt 4 is the primary host)

Unchanged theming contract

Public selectors remain stable for upgrades from v2.x:

• #toc-title, #toc-container
• .toc-item, .toc-link, .active-toc-item, …

See Styling and the root CHANGELOG.md.