diff --git a/.agents/skills/manimgl-best-practices/templates/3d_scene.py b/.agents/skills/manimgl-best-practices/templates/3d_scene.py
index 5c2da873..a9c13dca 100644
--- a/.agents/skills/manimgl-best-practices/templates/3d_scene.py
+++ b/.agents/skills/manimgl-best-practices/templates/3d_scene.py
@@ -254,5 +254,5 @@ class LightingTemplate(Scene):
 
 
 if __name__ == "__main__":
-    import os
-    os.system(f"manimgl {__file__} ThreeDSceneTemplate")
+    import subprocess
+    subprocess.run(["manimgl", __file__, "ThreeDSceneTemplate"])
diff --git a/.agents/skills/manimgl-best-practices/templates/basic_scene.py b/.agents/skills/manimgl-best-practices/templates/basic_scene.py
index c46d65ad..1df13734 100644
--- a/.agents/skills/manimgl-best-practices/templates/basic_scene.py
+++ b/.agents/skills/manimgl-best-practices/templates/basic_scene.py
@@ -130,5 +130,5 @@ class AnimationShowcase(Scene):
 if __name__ == "__main__":
     # This allows you to run: python basic_scene.py
     # (though using manimgl is recommended)
-    import os
-    os.system(f"manimgl {__file__} BasicSceneTemplate")
+    import subprocess
+    subprocess.run(["manimgl", __file__, "BasicSceneTemplate"])
diff --git a/.agents/skills/manimgl-best-practices/templates/math_scene.py b/.agents/skills/manimgl-best-practices/templates/math_scene.py
index 201d7d8c..bdab3585 100644
--- a/.agents/skills/manimgl-best-practices/templates/math_scene.py
+++ b/.agents/skills/manimgl-best-practices/templates/math_scene.py
@@ -329,5 +329,5 @@ class MatrixTemplate(Scene):
 
 
 if __name__ == "__main__":
-    import os
-    os.system(f"manimgl {__file__} MathSceneTemplate")
+    import subprocess
+    subprocess.run(["manimgl", __file__, "MathSceneTemplate"])
diff --git a/.claude/skills/manimgl-best-practices/templates/3d_scene.py b/.claude/skills/manimgl-best-practices/templates/3d_scene.py
index 5c2da873..a9c13dca 100644
--- a/.claude/skills/manimgl-best-practices/templates/3d_scene.py
+++ b/.claude/skills/manimgl-best-practices/templates/3d_scene.py
@@ -254,5 +254,5 @@ class LightingTemplate(Scene):
 
 
 if __name__ == "__main__":
-    import os
-    os.system(f"manimgl {__file__} ThreeDSceneTemplate")
+    import subprocess
+    subprocess.run(["manimgl", __file__, "ThreeDSceneTemplate"])
diff --git a/.claude/skills/manimgl-best-practices/templates/basic_scene.py b/.claude/skills/manimgl-best-practices/templates/basic_scene.py
index c46d65ad..1df13734 100644
--- a/.claude/skills/manimgl-best-practices/templates/basic_scene.py
+++ b/.claude/skills/manimgl-best-practices/templates/basic_scene.py
@@ -130,5 +130,5 @@ class AnimationShowcase(Scene):
 if __name__ == "__main__":
     # This allows you to run: python basic_scene.py
     # (though using manimgl is recommended)
-    import os
-    os.system(f"manimgl {__file__} BasicSceneTemplate")
+    import subprocess
+    subprocess.run(["manimgl", __file__, "BasicSceneTemplate"])
diff --git a/.claude/skills/manimgl-best-practices/templates/math_scene.py b/.claude/skills/manimgl-best-practices/templates/math_scene.py
index 201d7d8c..bdab3585 100644
--- a/.claude/skills/manimgl-best-practices/templates/math_scene.py
+++ b/.claude/skills/manimgl-best-practices/templates/math_scene.py
@@ -329,5 +329,5 @@ class MatrixTemplate(Scene):
 
 
 if __name__ == "__main__":
-    import os
-    os.system(f"manimgl {__file__} MathSceneTemplate")
+    import subprocess
+    subprocess.run(["manimgl", __file__, "MathSceneTemplate"])