Here are some references for those new to KiCad and keyboard design.

• ai03 PCB Designer Guide

• List of KiCad Keyboard Parts Libraries

• KiCad Docs

• KiCad Info

• KiCad Tutorials

• Design for manufacturing to be easier or more reliable is a good thing. Keyboards do not often push the limits, but here is one manufactures guides on that. EuroCircuits PCB Design Guidelines Their rules and guides are not the same as others, but they did a good job of laying them out to help understand the possible issues.

• Socketing a Microcontroller: Our guide already illustrates that, but filterpaper has a nice guide as well: Visual Guide to socket a Microcontroller