python
diff --git a/‎.pre-commit-config.yaml‎
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diff --git a/‎Android/testbed/app/src/main/res/drawable-xxhdpi/ic_launcher.png‎
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diff --git a/‎Doc/howto/logging_flow.png‎
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diff --git a/‎Doc/library/hashlib-blake2-tree.png‎
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diff --git a/‎Doc/library/kde_example.png‎
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diff --git a/‎Doc/library/tk_msg.png‎
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diff --git a/‎Doc/library/turtle-star.png‎
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diff --git a/‎Doc/using/mac_installer_02_readme.png‎
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diff --git a/‎Doc/using/mac_installer_07_applications.png‎
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diff --git a/‎Doc/using/mac_installer_09_custom_install_free_threaded.png‎
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@@ -91,6 +91,12 @@ repos:
         args: [--enable=default-role]
         files: ^Doc/|^Misc/NEWS.d/
 
+  - repo: https://github.com/oxipng/oxipng
+    rev: v9.1.5
+    hooks:
+      - id: oxipng
+        args: [ "-o", "2", "--strip", "safe", "--alpha" ]
+
   - repo: local
     hooks:
       - id: blurb-no-space-c-api