diff --git a/app/app.go b/app/app.go
new file mode 100644
index 0000000..9c9adde
--- /dev/null
+++ b/app/app.go
@@ -0,0 +1,33 @@
+package app
+
+import tea "charm.land/bubbletea/v2"
+
+type QuitMsg struct{}
+
+func Quit() tea.Cmd {
+	return func() tea.Msg { return QuitMsg{} }
+}
+
+type FocusMsg struct{}
+
+func Focus() tea.Cmd {
+	return func() tea.Msg { return FocusMsg{} }
+}
+
+type BlurMsg struct{}
+
+func Blur() tea.Cmd {
+	return func() tea.Msg { return BlurMsg{} }
+}
+
+type RequestFocusMsg struct{}
+
+func RequestFocus() tea.Cmd {
+	return func() tea.Msg { return RequestFocusMsg{} }
+}
+
+type SetTitleMsg struct{ Title string }
+
+func SetTitle(title string) tea.Cmd {
+	return func() tea.Msg { return SetTitleMsg{Title: title} }
+}