diff --git a/.gitignore b/.gitignore
index 4326a4ee1..768fd0921 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,8 @@ __pycache__
 
 # PyCharm related
 /.idea/
+
+# AI tool related.
+/AGENTS.md
+/CLAUDE.md
+/GEMINI.md