Use when swizzling Docusaurus theme components and editing theme elements — wrap or eject components from @docusaurus/theme-classic, override navbar/footer/sidebar/TOC/DocItem, place customised components under src/theme/, and choose safe (--wrap) vs full (--eject) swizzles. Triggers on tasks involving Docusaurus swizzling, theme component customization, navbar, footer, sidebar, or layout modifications.