scripts/startup/bl_ui/space_userpref.py

@@ -2375,6 +2375,7 @@ class USERPREF_PT_experimental_new_features(ExperimentalPanel, Panel):
                 ({"property": "use_sculpt_tools_tilt"}, ("blender/blender/issues/82877", "#82877")),
                 ({"property": "use_extended_asset_browser"},
                  ("blender/blender/projects/10", "Pipeline, Assets & IO Project Page")),
+                ({"property": "use_asset_shelf"}, ("blender/blender/issues/102879", "#102879")),
                 ({"property": "use_override_templates"}, ("blender/blender/issues/73318", "Milestone 4")),
                 ({"property": "use_new_volume_nodes"}, ("blender/blender/issues/103248", "#103248")),
             ),

source/blender/editors/asset/intern/asset_shelf.cc

@@ -51,6 +51,10 @@ void send_redraw_notifier(const bContext &C)
 
 static bool asset_shelf_poll(const bContext *C, const SpaceLink *space_link)
 {
+  if (!U.experimental.use_asset_shelf) {
+    return false;
+  }
+
   const SpaceType *space_type = BKE_spacetype_from_id(space_link->spacetype);
 
   /* Is there any asset shelf type registered that returns true for it's poll? */

source/blender/makesdna/DNA_userdef_types.h

@@ -684,7 +684,8 @@ typedef struct UserDef_Experimental {
   char use_sculpt_texture_paint;
   char enable_workbench_next;
   char use_new_volume_nodes;
-  char _pad[6];
+  char use_asset_shelf;
+  char _pad[5];
   /** `makesdna` does not allow empty structs. */
 } UserDef_Experimental;
 

source/blender/makesrna/intern/rna_userdef.c

@@ -6693,6 +6693,13 @@ static void rna_def_userdef_experimental(BlenderRNA *brna)
   prop = RNA_def_property(srna, "use_new_volume_nodes", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_ui_text(
       prop, "New Volume Nodes", "Enables visibility of the new Volume nodes in the UI");
+
+  prop = RNA_def_property(srna, "use_asset_shelf", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_ui_text(prop,
+                           "Asset Shelf",
+                           "Enables the asset shelf regions in the 3D view. Used by the Pose "
+                           "Library add-on in Pose Mode only");
+  RNA_def_property_update(prop, 0, "rna_userdef_ui_update");
 }
 
 static void rna_def_userdef_addon_collection(BlenderRNA *brna, PropertyRNA *cprop)