{"schema":"icu.useful-uncertainty-practice-state","schema_version":1,"storage_namespace":"icu-icud-003-progress-v1","scope":"browser_local","completion_states":["not_started","in_progress","complete","skipped"],"completion_rule":"Only complete counts as practiced; skipped remains distinct.","privacy":"Decision text, notes, status, and timestamps remain browser-local and are excluded from URLs.","export":"Versioned JSON download; reset removes only this key."}