diff --git a/skills/skill-creator/scripts/package_skill.py b/skills/skill-creator/scripts/package_skill.py
index 9aeaa76ba0d..123475ac6a0 100644
--- a/skills/skill-creator/scripts/package_skill.py
+++ b/skills/skill-creator/scripts/package_skill.py
@@ -64,6 +64,8 @@ def package_skill(skill_path, output_dir=None):
 
     skill_filename = output_path / f"{skill_name}.skill"
 
+    EXCLUDED_DIRS = {".git", ".svn", ".hg", "__pycache__", "node_modules"}
+
     # Create the .skill file (zip format)
     try:
         with zipfile.ZipFile(skill_filename, "w", zipfile.ZIP_DEFLATED) as zipf:
@@ -75,6 +77,10 @@ def package_skill(skill_path, output_dir=None):
                     print("   This is a security restriction to prevent including arbitrary files.")
                     return None
 
+                rel_parts = file_path.relative_to(skill_path).parts
+                if any(part in EXCLUDED_DIRS for part in rel_parts):
+                    continue
+
                 if file_path.is_file():
                     # Calculate the relative path within the zip
                     arcname = file_path.relative_to(skill_path.parent)