Every character has access to six crafting-related skill lines, each of which features its own selection of Passive Abilities:
You can unlock each of these skill lines by interacting with a related crafting station. Crafting skill lines progress as you earn Inspiration from actions like refining materials, creating items, deconstructing items, and completing crafting writs. As a crafting skill line ranks up, it grants access to Passives that serve to improve your crafting in one way or another.
Investing in all available crafting Passive Abilities requires 139 Skill Points—a costly feat by any measure. Of course, you can pick and choose Passives as you see fit. Or you can focus on priority crafting skills. You can even visit a Rededication Shrine to reclaim spent Skill Points after mastering a craft.
For more information on crafting skills (and crafting in general), refer to the guide’s Crafting section.