diff --git a/CLAUDE.md b/CLAUDE.md
index 643118a..7a5beb5 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -93,5 +93,11 @@ Currently supports Chapman University (Passio System ID: "263"). Each university
 
 ## Development Guidelines
 
+### General Guidelines
+- Use test-driven development and always validate code through testing
+
 ### Git Workflow
-- Use the name of the branch for all pull requests
\ No newline at end of file
+- Use the name of the branch for all pull requests
+
+### Code Style
+- Prefer arrow functions, especially in classes