diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6b4c3e..896cdda 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,10 @@ All notable changes to this project will be documented in this file.
 - Add CLAUDE.md and update .gitignore
 - Add godoc comments to public functions and types
 
+### 🧪 Testing
+
+- Add comprehensive validation and cursor test coverage
+
 ### ⚙️ Miscellaneous Tasks
 
 - *(deps)* Update pre-commit hook golangci/golangci-lint to v2.2.0