This module for the Pathfinder 1e game system for Foundry Virtual Tabletop provides additional functionality and support for the rule sets Spheres of Power and Spheres of Might from Drop Dead Studios.
It adds compendiums including classes and their features, talents and feats. In addition to that, it also enables the creation of Talent type features, configuring various Spheres character attributes via the system's Changes system, setting classes to have a Spheres Caster Level progression, and calculates a character's general Caster Level as well as Caster Levels for each specific sphere according to their classes and features.
As the module is still heavily in development, the best source for available features and notable changes is its changelog.