[hot] | Katas

return ( <div> <h4>Mastery path</h4> <div className="progress-bar" style= width: $masteryLevel% /> <p>history.length / 10 repetitions to black belt</p> </div> ); ; | Feature | Description | |--------|-------------| | Kata of the Day | Random recommended kata based on user level. | | Timed mode | Complete within X minutes to earn "speed belt". | | Compare replay | For movement katas: overlay user webcam vs sensei. | | Community variants | Users can fork a kata and change constraints. | | Streak counter | Daily kata completion streak. | 🗄️ Data Model (Simplified) interface Kata "brown" interface UserKataProgress userId: string; kataId: string; attempts: number; lastCompleted: Date; bestTimeMs?: number; masteryLevel: number; // 0-100

const KataPlayer = ( kata, onSubmit ) => const [userCode, setUserCode] = useState(kata.starterCode ; Tracks repetitions and proficiency. | | Community variants | Users can fork

const MasteryTracker = ( userId, kataId ) => const [history, setHistory] = useState([]); // Log each attempt with timestamp and score const logAttempt = (score) => const newAttempt = date: new Date(), score ; setHistory([...history, newAttempt]); // Update user's mastery level based on 3+ successful attempts ; const MasteryTracker = ( userId, kataId ) =&gt;