Is it possible to set up mbed projects so they share a mbed-os repository??

Hi @lennoxconner,

Yes, it is possible to use symlinks. In upcoming Mbed Studio 1.2 release we are adding a symlink feature that will allow you to use a single copy of Mbed OS across all your programs in the workspace. More information about it here: Suggestions to reduce project size - #19 by arekzaluski

Thanks,
Arek - Mbed Studio team