Build a volunteer management web app for nonprofits with these features: 1. Volunteer profiles with skills, interests, availability windows, and preferred causes. 2. Opportunity listings with location, time slots, required skills, and capacity limits. 3. Shift signup and check-in: volunteers claim slots, get QR check-in at the door, and admins see real-time fill rates. 4. Recurring shifts (weekly soup kitchen, monthly food bank) with auto-repost and substitute-request flows when someone cancels. 5. Hour tracking: automatic from check-ins, editable by admins, with per-volunteer totals and verification letters students can download for school requirements. 6. Automated email and SMS reminders at 48 hours and 2 hours before a shift, and a thank-you note after each completed shift. 7. An AI assistant that drafts shift descriptions from a short voice note, suggests the best-matched volunteers for an open shift based on skills and past attendance, writes personalized re-engagement messages to dormant volunteers, and turns a coordinator question like who covered the front desk in June into an answer from the hour log. 8. Impact dashboard: hours by program, month, and volunteer, exportable as the volunteer-section report most grant applications require. 9. Waitlist handling for over-capacity shifts. 10. Multi-role access: coordinators, admins, and volunteers see only their own tools.