diff --git a/treefmt.nix b/treefmt.nix
index 1d2496b..aa39100 100644
--- a/treefmt.nix
+++ b/treefmt.nix
@@ -5,6 +5,9 @@
   settings.global.excludes = [
     "*.toml"
     "*.txt"
+    ".gitattributes"
+    "CLAUDE.md"
+    ".python-version"
   ];
 
   programs.deadnix.enable = true;