diff --git a/main.go b/main.go
new file mode 100644
index 0000000..f23af7c
--- /dev/null
+++ b/main.go
@@ -0,0 +1,59 @@
+package main // import "git.fromouter.space/zygovh/caddy-runner"
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type config struct {
+	Backends map[string]struct {
+		Servers map[string]struct{ URL string }
+	}
+	Frontends map[string]struct {
+		EntryPoints []string
+		Backend     string
+		Routes      map[string]struct{ Rule string }
+	}
+}
+
+const PREFIX = "# +rule"
+
+func main() {
+	dir := flag.String("dir", "/opt/caddy/conf", "Path to Caddy configuration files")
+	suffix := flag.String("cfgext", ".conf", "File extension for matching configuration files")
+	flag.Parse()
+
+	checkErr(filepath.Walk(*dir, func(path string, info os.FileInfo, err error) error {
+		if strings.ToLower(filepath.Ext(path)) != strings.ToLower(*suffix) {
+			return nil
+		}
+
+		// Read file
+		data, err := ioutil.ReadFile(path)
+		if err != nil {
+			return err
+		}
+
+		// Split by linebreak
+		lines := strings.Split(string(data), "\n")
+		for _, line := range lines {
+			// Skip lines without marked comments
+			index := strings.Index(line, PREFIX)
+			if index < 0 {
+				return nil
+			}
+			rule := strings.TrimSpace(line[index+len(PREFIX):])
+		}
+
+		return nil
+	}), "error while scanning configuration files")
+}
+
+func checkErr(err error, errfmt string, args ...interface{}) {
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "[FATAL ERROR] "+errfmt+":\n    "+err.Error(), args...)
+	}
+}