diff --git a/mu/mu-cmd-add.cc b/mu/mu-cmd-add.cc
new file mode 100644
index 00000000..f30d6105
--- /dev/null
+++ b/mu/mu-cmd-add.cc
@@ -0,0 +1,38 @@
+/*
+** Copyright (C) 2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** 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 3, 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.
+**
+*/
+
+#include "config.h"
+#include "mu-cmd.hh"
+
+using namespace Mu;
+
+Result<void>
+Mu::mu_cmd_add(Mu::Store& store, const Options& opts)
+{
+	for (auto&& file: opts.add.files) {
+		const auto docid{store.add_message(file)};
+		if (!docid)
+			return Err(docid.error());
+		else
+			g_debug("added message @ %s, docid=%u",
+				file.c_str(), docid.value());
+	}
+
+	return Ok();
+}
diff --git a/mu/mu-cmd-mkdir.cc b/mu/mu-cmd-mkdir.cc
new file mode 100644
index 00000000..3fedf495
--- /dev/null
+++ b/mu/mu-cmd-mkdir.cc
@@ -0,0 +1,37 @@
+/*
+** Copyright (C) 2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** 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 3, 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.
+**
+*/
+
+#include "config.h"
+#include "mu-cmd.hh"
+
+#include "mu-maildir.hh"
+
+using namespace Mu;
+
+Mu::Result<void>
+Mu::mu_cmd_mkdir(const Options& opts)
+{
+	for (auto&& dir: opts.mkdir.dirs) {
+		if (auto&& res =
+		    maildir_mkdir(dir, opts.mkdir.mode); !res)
+			return res;
+	}
+
+	return Ok();
+}
diff --git a/mu/mu-cmd-remove.cc b/mu/mu-cmd-remove.cc
new file mode 100644
index 00000000..8e0455b1
--- /dev/null
+++ b/mu/mu-cmd-remove.cc
@@ -0,0 +1,38 @@
+/*
+** Copyright (C) 2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** 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 3, 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.
+**
+*/
+
+#include "config.h"
+#include "mu-cmd.hh"
+
+using namespace Mu;
+
+Result<void>
+Mu::mu_cmd_remove(Mu::Store& store, const Options& opts)
+{
+	for (auto&& file: opts.remove.files) {
+		const auto res = store.remove_message(file);
+		if (!res)
+			return Err(Error::Code::File, "failed to remove %s", file.c_str());
+		else
+			g_debug("removed message @ %s", file.c_str());
+	}
+
+	return Ok();
+}
+