Tinkering lets crafters assemble small mechanical devices.
Tinkerer Vilsis, found in the stone building between the Sojourner’s Camp and the Leatherworking area in Night Harbor, sells the Tinkering Toolkit needed to get started. Open the toolkit and click the hammer icon to bring up the recipe menu (your bag needs to be empty first).
Tinkering’s recipe list is currently very limited — as of the latest build, it’s only used to craft Archer traps.