IELTS skill system shared core. Use when maintaining the IELTS skills, initializing the local ~/.ielts data store, recording study events, checking current IELTS scoring/test-format facts, or generating dashboard data used by ielts, ielts-diagnose, ielts-writing, ielts-reading, ielts-listening, ielts-speaking, ielts-vocab, and ielts-dashboard.
