I love the wardrobe, and will create projects in it. However, it would be nice if I could pin a code so it wouldn't go away after thirty days. Recently I thought I had re-saved a code, but didn't so I lost that project which was very important to me. It's troublesome redoing my design, especially since I only remember half the markings.

My idea similar to saving messages, but with wardrobe codes instead. Have a breeding project, or maybe a scene with specific decor? Save your design and remove it yourself when it's complete.
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Heda RedBox suggested a limit of 2-5 pins. I completely agree with this, but in the end it's up to the staff to decide what an appropriate number would be.