While both were created for an older alpha (and thus don’t run in the latest build), you can get some great info from Frostfeast and Candledark on how quests work. I believe that @Froggy’s Cafe Mod works in the latest build, and it has a quest (the queen bee) that might be helpful as well.
Links:
http://discourse.stonehearth.net/t/dev-blog-candledark-returns/17379?u=jomaxro
http://discourse.stonehearth.net/t/tis-the-season-for-frostfeast/18394?u=jomaxro
http://discourse.stonehearth.net/t/mod-stonehearth-cafe-cooking-and-farming-expansion-1-6/10159?u=jomaxro