diff --git a/src/olympic/keel/include/keel/assetmanager.hpp b/src/olympic/keel/include/keel/assetmanager.hpp
index 0a1525e2..364f26f2 100644
--- a/src/olympic/keel/include/keel/assetmanager.hpp
+++ b/src/olympic/keel/include/keel/assetmanager.hpp
@@ -238,6 +238,9 @@ class AssetManager {
 				}
 
 				ox::Error updateAssetId(ox::StringViewCR oldId, ox::StringViewCR newId) noexcept final {
+					if (!m_cache.contains(oldId)) {
+						return {};
+					}
 					auto &o = m_cache[oldId];
 					auto &n = m_cache[newId];
 					n = std::move(o);
@@ -246,11 +249,14 @@ class AssetManager {
 				}
 
 				void gc() noexcept final {
-					for (auto const&ack : m_cache.keys()) {
+					for (size_t i = 0; i < m_cache.keys().size();) {
+						auto const &ack = m_cache.keys()[i];
 						auto &ac = m_cache[ack];
 						if (!ac->references()) {
 							m_cache.erase(ack);
+							continue;
 						}
+						++i;
 					}
 				}
 
@@ -309,6 +315,9 @@ class AssetManager {
 			if (m_fileUpdated.contains(newId)) {
 				return ox::Error{1, "new asset ID already has an entry"};
 			}
+			if (!m_fileUpdated.contains(oldId)) {
+				return {};
+			}
 			auto &o = m_fileUpdated[oldId];
 			auto &n = m_fileUpdated[newId];
 			n = std::move(o);
diff --git a/src/olympic/studio/applib/src/projectexplorer.cpp b/src/olympic/studio/applib/src/projectexplorer.cpp
index 942548c5..f0edd82a 100644
--- a/src/olympic/studio/applib/src/projectexplorer.cpp
+++ b/src/olympic/studio/applib/src/projectexplorer.cpp
@@ -30,6 +30,10 @@ void ProjectExplorer::fileMoved(ox::StringViewCR src, ox::StringViewCR dst) cons
 	moveItem.emit(src, dst);
 }
 
+void ProjectExplorer::dirMoved(ox::StringViewCR src, ox::StringViewCR dst) const noexcept {
+	moveDir.emit(src, dst);
+}
+
 void ProjectExplorer::fileContextMenu(ox::StringViewCR path) const noexcept {
 	if (ImGui::BeginPopupContextItem("FileMenu", ImGuiPopupFlags_MouseButtonRight)) {
 		if (ImGui::MenuItem("Delete")) {
diff --git a/src/olympic/studio/applib/src/projectexplorer.hpp b/src/olympic/studio/applib/src/projectexplorer.hpp
index e35d7e05..c0b4420a 100644
--- a/src/olympic/studio/applib/src/projectexplorer.hpp
+++ b/src/olympic/studio/applib/src/projectexplorer.hpp
@@ -20,6 +20,7 @@ class ProjectExplorer final: public FileExplorer {
 		ox::Signal<ox::Error(ox::StringViewCR)> addDir;
 		ox::Signal<ox::Error(ox::StringViewCR)> deleteItem;
 		ox::Signal<ox::Error(ox::StringViewCR)> renameItem;
+		ox::Signal<ox::Error(ox::StringViewCR src, ox::StringViewCR dst)> moveDir;
 		ox::Signal<ox::Error(ox::StringViewCR src, ox::StringViewCR dst)> moveItem;
 
 		explicit ProjectExplorer(keel::Context &kctx) noexcept;
@@ -33,6 +34,8 @@ class ProjectExplorer final: public FileExplorer {
 
 		void fileMoved(ox::StringViewCR src, ox::StringViewCR dst) const noexcept override;
 
+		void dirMoved(ox::StringViewCR src, ox::StringViewCR dst) const noexcept override;
+
 		void fileContextMenu(ox::StringViewCR path) const noexcept override;
 
 		void dirContextMenu(ox::StringViewCR path) const noexcept override;
diff --git a/src/olympic/studio/applib/src/studioapp.cpp b/src/olympic/studio/applib/src/studioapp.cpp
index 54ecc628..64c6ba89 100644
--- a/src/olympic/studio/applib/src/studioapp.cpp
+++ b/src/olympic/studio/applib/src/studioapp.cpp
@@ -59,6 +59,7 @@ StudioUI::StudioUI(turbine::Context &ctx, ox::StringParam projectDataDir) noexce
 	m_projectExplorer.addItem.connect(this, &StudioUI::addFile);
 	m_projectExplorer.deleteItem.connect(this, &StudioUI::deleteFile);
 	m_projectExplorer.renameItem.connect(this, &StudioUI::renameFile);
+	m_projectExplorer.moveDir.connect(this, &StudioUI::queueDirMove);
 	m_projectExplorer.moveItem.connect(this, &StudioUI::queueFileMove);
 	m_renameFile.moveFile.connect(this, &StudioUI::queueFileMove);
 	m_newProject.finished.connect(this, &StudioUI::createOpenProject);
@@ -486,6 +487,11 @@ ox::Error StudioUI::closeFile(ox::StringViewCR path) noexcept {
 	return {};
 }
 
+ox::Error StudioUI::queueDirMove(ox::StringParam src, ox::StringParam dst) noexcept {
+	m_queuedDirMoves.emplace_back(std::move(src), std::move(dst));
+	return {};
+}
+
 ox::Error StudioUI::queueFileMove(ox::StringParam src, ox::StringParam dst) noexcept {
 	m_queuedMoves.emplace_back(std::move(src), std::move(dst));
 	return {};
@@ -496,6 +502,10 @@ void StudioUI::procFileMoves() noexcept {
 		oxLogError(m_project->moveItem(m.a, m.b));
 	}
 	m_queuedMoves.clear();
+	for (auto const &m : m_queuedDirMoves) {
+		oxLogError(m_project->moveDir(m.a, m.b));
+	}
+	m_queuedDirMoves.clear();
 }
 
 }
diff --git a/src/olympic/studio/applib/src/studioapp.hpp b/src/olympic/studio/applib/src/studioapp.hpp
index 7e0a960d..c2e6eb32 100644
--- a/src/olympic/studio/applib/src/studioapp.hpp
+++ b/src/olympic/studio/applib/src/studioapp.hpp
@@ -40,7 +40,8 @@ class StudioUI: public ox::SignalHandler {
 		BaseEditor *m_activeEditorOnLastDraw = nullptr;
 		BaseEditor *m_activeEditor = nullptr;
 		BaseEditor *m_activeEditorUpdatePending = nullptr;
-		ox::Vector<ox::Pair<ox::String, ox::String>> m_queuedMoves;
+		ox::Vector<ox::Pair<ox::String>> m_queuedMoves;
+		ox::Vector<ox::Pair<ox::String>> m_queuedDirMoves;
 		NewMenu m_newMenu{keelCtx(m_tctx)};
 		DeleteConfirmation m_deleteConfirmation;
 		NewDir m_newDirDialog;
@@ -113,6 +114,8 @@ class StudioUI: public ox::SignalHandler {
 
 		ox::Error closeFile(ox::StringViewCR path) noexcept;
 
+		ox::Error queueDirMove(ox::StringParam src, ox::StringParam dst) noexcept;
+
 		ox::Error queueFileMove(ox::StringParam src, ox::StringParam dst) noexcept;
 
 		void procFileMoves() noexcept;
diff --git a/src/olympic/studio/modlib/include/studio/dragdrop.hpp b/src/olympic/studio/modlib/include/studio/dragdrop.hpp
index e75bb040..b4cd2798 100644
--- a/src/olympic/studio/modlib/include/studio/dragdrop.hpp
+++ b/src/olympic/studio/modlib/include/studio/dragdrop.hpp
@@ -13,10 +13,12 @@ struct FileRef {
 	static constexpr auto TypeName = "net.drinkingtea.studio.FileRef";
 	static constexpr auto TypeVersion = 1;
 	ox::String path;
+	bool isDir{};
 };
 
 OX_MODEL_BEGIN(FileRef)
 	OX_MODEL_FIELD(path)
+	OX_MODEL_FIELD(isDir)
 OX_MODEL_END()
 
 }
diff --git a/src/olympic/studio/modlib/include/studio/filetreemodel.hpp b/src/olympic/studio/modlib/include/studio/filetreemodel.hpp
index 673f7b94..3d5a3656 100644
--- a/src/olympic/studio/modlib/include/studio/filetreemodel.hpp
+++ b/src/olympic/studio/modlib/include/studio/filetreemodel.hpp
@@ -47,6 +47,8 @@ class FileExplorer: public ox::SignalHandler {
 
 		virtual void fileMoved(ox::StringViewCR src, ox::StringViewCR dst) const noexcept;
 
+		virtual void dirMoved(ox::StringViewCR src, ox::StringViewCR dst) const noexcept;
+
 		void drawFileContextMenu(ox::CStringViewCR path) const noexcept;
 
 		void drawDirContextMenu(ox::CStringViewCR path) const noexcept;
diff --git a/src/olympic/studio/modlib/include/studio/project.hpp b/src/olympic/studio/modlib/include/studio/project.hpp
index c058281d..76489c68 100644
--- a/src/olympic/studio/modlib/include/studio/project.hpp
+++ b/src/olympic/studio/modlib/include/studio/project.hpp
@@ -94,6 +94,8 @@ class Project: public ox::SignalHandler {
 
 		ox::Error moveItem(ox::StringViewCR src, ox::StringViewCR dest) noexcept;
 
+		ox::Error moveDir(ox::StringViewCR src, ox::StringViewCR dest) noexcept;
+
 		ox::Error deleteItem(ox::StringViewCR path) noexcept;
 
 		[[nodiscard]]
diff --git a/src/olympic/studio/modlib/src/filetreemodel.cpp b/src/olympic/studio/modlib/src/filetreemodel.cpp
index f0ac65e3..d7d347a0 100644
--- a/src/olympic/studio/modlib/src/filetreemodel.cpp
+++ b/src/olympic/studio/modlib/src/filetreemodel.cpp
@@ -43,6 +43,8 @@ void FileExplorer::fileDeleted(ox::StringViewCR) const noexcept {}
 
 void FileExplorer::fileMoved(ox::StringViewCR, ox::StringViewCR) const noexcept {}
 
+void FileExplorer::dirMoved(ox::StringViewCR, ox::StringViewCR) const noexcept {}
+
 void FileExplorer::drawFileContextMenu(ox::CStringViewCR path) const noexcept {
 	ig::IDStackItem const idStackItem{path};
 	fileContextMenu(path);
@@ -93,11 +95,21 @@ void FileTreeModel::draw(turbine::Context &tctx) const noexcept {
 		}
 		ig::IDStackItem const idStackItem{m_name};
 		m_explorer.drawDirContextMenu(m_fullPath);
+		if (m_explorer.fileDraggable()) {
+			std::ignore = ig::dragDropSource([this] {
+				ImGui::Text("%s", m_name.c_str());
+				return ig::setDragDropPayload("FileRef", FileRef{ox::String{m_fullPath}, true});
+			});
+		}
 		if (ig::DragDropTarget const dragDropTarget; dragDropTarget) {
 			auto const [ref, err] = ig::getDragDropPayload<FileRef>("FileRef");
 			if (!err) {
 				auto const name = substr(ref.path, find(ref.path.rbegin(), ref.path.rend(), '/').offset() + 1);
-				m_explorer.fileMoved(ref.path, sfmt("{}/{}", m_fullPath, name));
+				if (ref.isDir) {
+					m_explorer.dirMoved(ref.path, sfmt("{}/{}", m_fullPath, name));
+				} else {
+					m_explorer.fileMoved(ref.path, sfmt("{}/{}", m_fullPath, name));
+				}
 			}
 		}
 		if (nodeOpen) {
diff --git a/src/olympic/studio/modlib/src/project.cpp b/src/olympic/studio/modlib/src/project.cpp
index 8c1f7f9a..1aa311a0 100644
--- a/src/olympic/studio/modlib/src/project.cpp
+++ b/src/olympic/studio/modlib/src/project.cpp
@@ -26,6 +26,26 @@ static void generateTypes(ox::TypeStore &ts) noexcept {
 	}
 }
 
+static ox::Result<ox::Vector<ox::String>> listAllRecursive(ox::FileSystem &fs, ox::StringViewCR path) {
+	// there really isn't much recourse if this function fails, just log it and move on
+	auto [out, outErr] = fs.ls(path);
+	oxLogError(outErr);
+	for (auto const &p : out) {
+		auto const [stat, statErr] = fs.stat(path);
+		if (statErr) {
+			oxLogError(statErr);
+			continue;
+		}
+		if (stat.fileType == ox::FileType::Directory) {
+			OX_REQUIRE_M(l, listAllRecursive(fs, sfmt("{}/{}", path, p)));
+			for (auto &c : l) {
+				out.emplace_back(std::move(c));
+			}
+		}
+	}
+	return std::move(out);
+}
+
 
 Project::Project(keel::Context &ctx, ox::String path, ox::StringViewCR projectDataDir):
 	m_kctx(ctx),
@@ -78,6 +98,21 @@ ox::Error Project::moveItem(ox::StringViewCR src, ox::StringViewCR dest) noexcep
 	return {};
 }
 
+ox::Error Project::moveDir(ox::StringViewCR src, ox::StringViewCR dest) noexcept {
+	OX_REQUIRE(files, listAllRecursive(m_fs, src));
+	OX_RETURN_ERROR(m_fs.move(src, dest));
+	fileMoved.emit(src, dest, ox::UUID{});
+	for (auto const &op : files) {
+		auto const name =
+			substr(op, ox::find(op.rbegin(), op.rend(), '/').offset() + 1);
+		auto const np = sfmt("{}/{}", dest, name);
+		OX_RETURN_ERROR(keel::updatePath(m_kctx, op, np));
+		OX_REQUIRE(uuid, keel::pathToUuid(m_kctx, dest));
+		fileMoved.emit(src, dest, uuid);
+	}
+	return {};
+}
+
 ox::Error Project::deleteItem(ox::StringViewCR path) noexcept {
 	OX_REQUIRE(stat, m_fs.stat(path));
 	if (stat.fileType == ox::FileType::Directory) {