diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/validation.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/validation.rs
index 4e6ddaef0..536f866f0 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/validation.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/validation.rs
@@ -40,6 +40,7 @@ pub(crate) fn validate_direct_codex_user_item(
                 let name = name.trim();
                 if name.is_empty()
                     || name.chars().count() > 120
+                    || matches!(name, "." | "..")
                     || name.chars().any(|character| {
                         character.is_control()
                             || character.is_whitespace()