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diff --git a/cmd/cuesonnet/main.go b/cmd/cuesonnet/main.go
new file mode 100644
index 0000000000000000000000000000000000000000..9f740d252ae58b771327748735258edabc22df11
--- /dev/null
+++ b/cmd/cuesonnet/main.go
@@ -0,0 +1,35 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+
+	"go.jolheiser.com/cuesonnet"
+)
+
+func maine() error {
+	args := os.Args[1:]
+	if len(args) < 2 {
+		log.Fatalln("cuesonnet <schema.cue> <data.jsonnet>")
+	}
+
+	schema, err := os.ReadFile(args[0])
+	if err != nil {
+		return fmt.Errorf("could not open schema: %w", err)
+	}
+
+	data, err := os.ReadFile(args[1])
+	if err != nil {
+		return fmt.Errorf("could not open data: %w", err)
+	}
+
+	return cuesonnet.Schema(string(schema)).Decode(bytes.NewReader(data), &map[string]any{})
+}
+
+func main() {
+	if err := maine(); err != nil {
+		log.Println(err)
+	}
+}