diff --git a/ui/buffer.go b/ui/buffer.go
new file mode 100644
index 0000000..beaec6b
--- /dev/null
+++ b/ui/buffer.go
@@ -0,0 +1,26 @@
+package ui
+
+import (
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+// Buffer represents the behaviour of a user-input buffer.
+type Buffer interface {
+	validateInput(m model, input string) error
+	handleInput(input string) tea.Msg
+	logToFile(m model, input string)
+}
+
+// StatusBuffer is the privileged status buffer where e.g. you input
+// program-wide commands. It can also report general status information, e.g.
+// the status of ACN connectivity.
+type StatusBuffer struct {
+	inputChannel chan string
+}
+
+// ProfileBuffer is the profile buffer. There can be several profile buffers
+// which correspond to several profiles. Profile buffers take input and report
+// output for profile-specific information, e.g. invites from a new contact.
+type ProfileBuffer struct {
+	inputChannel chan string
+}