Day 3 of SolveFromZero — pick a real hackathon brief, ship a working solution. Today's problem is a perennial Smart India Hackathon: 35% of Indian crop losses come from undiagnosed disease, and the village ag-extension officer can't visit every farm.

The fix: a phone app where the farmer photographs a sick leaf, AI returns the disease + a remedy in Hindi or Marathi. Runs fully offline on a ₹6,000 Android phone.

The hard constraints

₹6,000 Android phone, 2 GB RAM

Network