getSkillClass
Look up a registered skill class by its SKILL_NAME. Returns the class
reference itself (not an instance); use
create() to get an instance. Returns undefined if no skill
is registered under that name — for a boolean check use
has().
Matches Python’s get_skill_class(skill_name) (registry.py:196-203).
Parameters
name
The registered skill name (the skill class’s static SKILL_NAME).
Returns
typeof SkillBase | undefined — the skill class, or undefined if not
registered.