diff --git a/.changeset/sidenav-semantics.md b/.changeset/sidenav-semantics.md
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+---
+"@cloudoperators/juno-ui-components": patch
+---
+
+fix(ui): emit valid HTML in SideNavigation by rendering items/groups as `<li>` and wrapping nested children in `<ul>`. `SideNavigationGroup` is now first-level only and no longer participates in `LevelContext`.