CHANGELOG.md

@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Removed
+Rewrite from scratch
+
+### Added
+- a 256 bit integer type, `U256`.
 
 ## [0.1.1] - 2024-09-09