License exception (platform vs application)

Loko is AGPLv3 for various reasons. There are benefits to using the AGPLv3 that I prefer to keep, but it's not a perfect match for a compiler + runtime. To make Loko more widely usable, to even developers of closed source applications, I would like to formulate a suitable exception to the license. People should not need to release the code to their application that is running on Loko. There are precedents in Linux and GCC.

An expert in free software licenses is likely needed for this.