For the next release, I'd like to introduce skills that are only accessible if you've equipped the corresponding piece of equipment.
Thus, this skill shouldn't be part of the save game as is, but added when equipping/removed when unequipping (if the skill isn't already known by the character).
Those skills should be drawn in another color in the menu mode, to show clearly where they come from.
Also the equipment description should clearly show what skill it brings, and the skill description should clearly show what piece of equipment it comes from.
This induces the concept of natural skills (the skills learned when levelling up), which will stay as is. The characters will then learn much less natural skills, and will have to deal with equipment ones.
Added full support to obtaining skills through equipment.
The skills obtained are of course removed when unequiping, while
the permanent skills remain.
Those can be viewed both in the menu and in the shop modes.
(See the omni-sword for an extreme example.)