# SKM in/outputs in Mutable macro libraries 

**URL:** <https://forums.unrealengine.com/t/skm-in-outputs-in-mutable-macro-libraries/2855750>\
**Category:** Rendering\
**Tags:** unreal-engine, Epic-Pro-Support, question\
**Created:** [October 12, 2026, 9:09am UTC](https://forums.unrealengine.com/t/skm-in-outputs-in-mutable-macro-libraries/2855750 "2026-10-12T09:09:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![anonymous-edc](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\
**Post date:** [October 12, 2026, 9:09am UTC](https://forums.unrealengine.com/t/skm-in-outputs-in-mutable-macro-libraries/2855750/1 "2026-10-12T09:09:33Z")

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Hello Mutable gang 🙂

I noticed that the CO Macro libraries lack input and output pins for skeletal meshes. I’m about to make an internal push for a modification that has these pins, and I wonder if there is any plans on your end to add one too, just so I know to fix any future conflicts.

Thank you 😃

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**Author:** ![DDeVoe](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ddevoe/32/1000886_2.png) [@DDeVoe](https://forums.unrealengine.com/u/DDeVoe)\
**Post date:** [October 15, 2026, 8:20am UTC](https://forums.unrealengine.com/t/skm-in-outputs-in-mutable-macro-libraries/2855750/2 "2026-10-15T08:20:22Z")

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Hey there,

We’ve already finished the work; it just didn’t make it in time for 5.8 or the hotfixes. If you like, you can integrate this change.

[https://github.com/EpicGames/UnrealEngine/commit/dc0703c34de815e4f8c4cbfaeb459d6c3ad62f1f](https://github.com/EpicGames/UnrealEngine/commit/dc0703c34de815e4f8c4cbfaeb459d6c3ad62f1f)

Dustin