SkillGetConList defines the conditions required to learn each skill—class, race, gender restrictions, level requirements, costs, and prerequisite skills. Files are organized as regional variants with an additional _Guild suffix for guild skills.
Regional variant files include the non-standard _Guild suffix in addition to standard suffixes
All string-typed fields (class, gender, race, etc.) use Common as a wildcard sentinel for “all” — these are kept as strings rather than enums for this reason
prevSkillId and prerequisite fields use string type to support comma-separated multi-value lists
Related schemas: SkillData defines the skills themselves; SkillGetConList defines the conditions for learning them