Promising, Autonomy, Skill

As Kant's treatment of False Promising exemplifies, his concept of Autonomy is, in the Stoic tradition, a process of self-constraint, i. e. even his 'imperfect' duties, are derived as resistances to inclinations.  In contrast, Nietzsche's treatment of Promising suggests a positive concept of Autonomy, which, though he never characterizes it as such, can be recognized more familiarly as Skill.  For, Skill is Ability, and the sincere 'I promise to do X' = 'I have the ability to do X, and I will try to do X'.  Furthermore, Skill involves not only self-control, but "mastery over circumstances" (Genealogy of Morals, II, 2), as well.  Plus, Skill is an extended process, thereby requiring attention span, or, as Nietzsche characterizes it, "memory of the will" (GM, II, 1).  Also, an order of rank obtains between the skilled and the unskilled, not only when unrelated, but when in a teacher-learner context.  Finally, Skill is Power, so it is certainly implicated in Nietzsche's general doctrine.