diff --git a/cmd/pm/main.go b/cmd/pm/main.go
new file mode 100644
index 0000000..fe66ae5
--- /dev/null
+++ b/cmd/pm/main.go
@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+const usage = `pm: simple, cross-platform system package manager
+
+subcommands:
+  keyring    (key) -- interact with pm's OpenPGP keyring
+`
+
+func main() {
+	if len(os.Args) < 2 {
+		fatal(usage)
+	}
+	cmd := os.Args[1]
+
+	switch cmd {
+	case "key", "keyring":
+	default:
+		fatal("uknown subcommand %q\n\nusage: %v", cmd, usage)
+	}
+}
+
+func fatal(f string, args ...interface{}) {
+	fmt.Fprintf(os.Stderr, f, args...)
+	os.Exit(1)
+}