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diff --git a/source/blender/blenkernel/BKE_armature.hh b/source/blender/blenkernel/BKE_armature.hh
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+++ b/source/blender/blenkernel/BKE_armature.hh
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+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#pragma once
+
+/** \file
+ * \ingroup bke
+ */
+#ifndef __cplusplus
+#  error This is a C++ only header.
+#endif
+
+#include "BKE_armature.h"
+
+#include "BLI_function_ref.hh"
+#include "BLI_set.hh"
+
+namespace blender::bke {
+
+struct SelectedBonesResult {
+  bool all_bones_selected = true;
+  bool no_bones_selected = true;
+};
+
+using SelectedBoneCallback = blender::FunctionRef<void(Bone *bone)>;
+SelectedBonesResult BKE_armature_find_selected_bones(const bArmature *armature,
+                                                     SelectedBoneCallback callback);
+
+using BoneNameSet = blender::Set<std::string>;
+/**
+ * Return a set of names of the selected bones. An empty set means "ignore bone
+ * selection", which either means all bones are selected, or none are.
+ */
+BoneNameSet BKE_armature_find_selected_bone_names(const bArmature *armature);
+
+};  // namespace blender::bke