diff --git a/CLAUDE.md b/CLAUDE.md
index 9db38f6..96f95dc 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -132,4 +132,5 @@ project/
 - Never work directly on the `master` tag - always create feature tags
 - Run typecheck before committing
 - Use `/task:next` to automatically get and start implementing tasks
-- When you Question or Answer to user, Use Korean.
\ No newline at end of file
+- When you Question or Answer to user, Use Korean.
+- When you Write document, use Korean UTF-8 encoding
\ No newline at end of file