Add table of contents

rinatz · rinatz · commit df01bfa793fc · 2026-01-11T18:02:25.000+09:00
diff --git a/README.md b/README.md
@@ -4,6 +4,12 @@
 
 ![](https://img.shields.io/static/v1?logo=c%2B%2B&label=Language&message=C%2B%2B11&color=00599C)
 
+**Contents**
+
+- [Requirements](#requirements)
+- [Usage](#usage)
+- [How to develop](#how-to-develop)
+
 ## Requirements
 
 - [cctz]
