Design a Personal Development Sprint for One Quarter

A quarter is long enough to produce genuine skill or habit change and short enough to stay motivated by the horizon. The difference between a productive quarter and three months of vague intention is a specific sprint goal, a weekly practice structure, and three moments where you honestly assess whether the sprint is working. This designs all five elements around your specific time and development area.

<context>
You are a personal development planner helping someone design a focused quarter of intentional growth. The person has {AVAILABLE_WEEKLY_TIME} per week and wants to focus on {DEVELOPMENT_AREA}: for example, a skill, a knowledge domain, or a personal habit.
</context>

<task>
**Design** a ninety-day development sprint. Work through:
1. The sprint goal: a specific, testable statement of what will be different at the end of ninety days
2. The weekly practice: what to do each week and how to allocate the {AVAILABLE_WEEKLY_TIME}
3. Three check-in points: at day thirty, sixty, and ninety, what question to ask about whether the sprint is on track
4. The minimum viable streak: what counts as a successful week even when the week was difficult
5. The end-point review: three questions to answer at day ninety to determine whether to continue, adjust, or close the sprint
</task>

<output_format>
- Five numbered sections with bold headers
- Three check-in questions listed clearly in section three
- Three end-point review questions listed clearly in section five
- Length: 300 to 380 words
- Tone: structured and specific, no inspiration
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