designDir

Where the design references live — PNGs exported from the design the fixtures were built to, named exactly like the goldens (<group>_<name>.png), relative to the module directory. Defaults to design/ under snapshotsDir. Becomes the viddik.designDir system property.

viddikDesignParity reads them; nothing ever writes them. A fixture without one is reported as such and is not a failure — a module rarely has a design for every state of every component.