diff --git a/apps/web/src/components/Sidebar.tsx b/apps/web/src/components/Sidebar.tsx
index 4db083dcce3..738478c1efa 100644
--- a/apps/web/src/components/Sidebar.tsx
+++ b/apps/web/src/components/Sidebar.tsx
@@ -143,6 +143,7 @@ import {
   SidebarMenuSubItem,
   SidebarSeparator,
   SidebarTrigger,
+  useSidebar,
 } from "./ui/sidebar";
 import { useThreadSelectionStore } from "../threadSelectionStore";
 import { useCommandPaletteStore } from "../commandPaletteStore";
@@ -931,6 +932,7 @@ const SidebarProjectItem = memo(function SidebarProjectItem(props: SidebarProjec
   }));
   const { updateSettings } = useUpdateSettings();
   const router = useRouter();
+  const { isMobile, setOpenMobile } = useSidebar();
   const markThreadUnread = useUiStateStore((state) => state.markThreadUnread);
   const toggleProject = useUiStateStore((state) => state.toggleProject);
   const toggleThreadSelection = useThreadSelectionStore((state) => state.toggleThread);
@@ -1519,12 +1521,15 @@ const SidebarProjectItem = memo(function SidebarProjectItem(props: SidebarProjec
         clearSelection();
       }
       setSelectionAnchor(scopedThreadKey(threadRef));
+      if (isMobile) {
+        setOpenMobile(false);
+      }
       void router.navigate({
         to: "/$environmentId/$threadId",
         params: buildThreadRouteParams(threadRef),
       });
     },
-    [clearSelection, router, setSelectionAnchor],
+    [clearSelection, isMobile, router, setOpenMobile, setSelectionAnchor],
   );
 
   const handleThreadClick = useCallback(
@@ -1555,12 +1560,23 @@ const SidebarProjectItem = memo(function SidebarProjectItem(props: SidebarProjec
         clearSelection();
       }
       setSelectionAnchor(threadKey);
+      if (isMobile) {
+        setOpenMobile(false);
+      }
       void router.navigate({
         to: "/$environmentId/$threadId",
         params: buildThreadRouteParams(threadRef),
       });
     },
-    [clearSelection, rangeSelectTo, router, setSelectionAnchor, toggleThreadSelection],
+    [
+      clearSelection,
+      isMobile,
+      rangeSelectTo,
+      router,
+      setOpenMobile,
+      setSelectionAnchor,
+      toggleThreadSelection,
+    ],
   );
 
   const handleMultiSelectContextMenu = useCallback(
@@ -1658,6 +1674,9 @@ const SidebarProjectItem = memo(function SidebarProjectItem(props: SidebarProjec
               }
             : null,
       });
+      if (isMobile) {
+        setOpenMobile(false);
+      }
       void handleNewThread(scopeProjectRef(member.environmentId, member.id), {
         ...(seedContext.branch !== undefined ? { branch: seedContext.branch } : {}),
         ...(seedContext.worktreePath !== undefined
@@ -1666,7 +1685,7 @@ const SidebarProjectItem = memo(function SidebarProjectItem(props: SidebarProjec
         envMode: seedContext.envMode,
       });
     },
-    [defaultThreadEnvMode, handleNewThread, router],
+    [defaultThreadEnvMode, handleNewThread, isMobile, router, setOpenMobile],
   );
 
   const handleCreateThreadClick = useCallback(
@@ -2703,6 +2722,7 @@ export default function Sidebar() {
   const { updateSettings } = useUpdateSettings();
   const { handleNewThread } = useNewThreadHandler();
   const { archiveThread, deleteThread } = useThreadActions();
+  const { isMobile, setOpenMobile } = useSidebar();
   const routeThreadRef = useParams({
     strict: false,
     select: (params) => resolveThreadRouteRef(params),
@@ -2855,12 +2875,15 @@ export default function Sidebar() {
         clearSelection();
       }
       setSelectionAnchor(scopedThreadKey(threadRef));
+      if (isMobile) {
+        setOpenMobile(false);
+      }
       void navigate({
         to: "/$environmentId/$threadId",
         params: buildThreadRouteParams(threadRef),
       });
     },
-    [clearSelection, navigate, setSelectionAnchor],
+    [clearSelection, isMobile, navigate, setOpenMobile, setSelectionAnchor],
   );
 
   const projectDnDSensors = useSensors(