diff --git a/.gitignore b/.gitignore
index e140c1f..96d478b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,9 +31,13 @@ temp_lib/
 .cursor/
 AGENTS.md
 CLAUDE.md
+CLAUDE.md.backup*
 *_TASK.md
 
 # Claude project-specific files
 .claude/
 
-.env
\ No newline at end of file
+# Local tooling artifacts
+.serena/
+
+.env