Two way sync between dndbeyond.com and FoundryVTT.
For a simple development add a symlink for the "dist/foundry-plugin/dndbeyond-snyc" dir into your FoundryVTT modules dir.
ln -s ~/src/dndbeyond-sync/dist/foundry-plugin/dndbeyond-sync /Users/kurt/Library/Application\ Support/FoundryVTT/Data/modules