- Confirm
symfinity/ui-kernelis registered inconfig/bundles.php. - After editing DTCG theme files under
config/themes/, runbin/console cache:clear. - In dev, remove compiled AssetMapper output under
public/assets/if it shadows live kernel CSS.
Follow the version sections in upgrade.md. Schema 2.0 semantic colours and physics axis changes in 0.2.x require theme file updates and CSS snapshot regeneration.
The UI Kernel collector registers only when kernel.debug is true and symfony/web-profiler-bundle is installed. See profiler.md.