Building a Scrabble Companion with Gemini 2.0: Board State Analysis Prompt

23-board-ai-smart-scrabble-gemini-4.dart

String _constructImageComparisonPrompt(Map<String, dynamic> previousState) {
  return '''
  Compare these two Scrabble board images: the first is the previous state, the second is after a move.
  Identify ONLY new letters that appear in the second image.

  Previous board state for reference:
  ${jsonEncode(previousState)}

  Return ONLY a JSON object in exactly this format:
  {
    "word": "EXAMPLE",
    "score": 15,
    "newLetters": [
      {
        "letter": "A",
        "row": 7,
        "col": 7,
        "points": 1
      }
    ]
  }

  Rules:
  - Use 0-based indices (0-14) for coordinates
  - All coordinates must be within the 15x15 grid
  - Return ONLY the JSON, no explanatory text
  - If no valid word was played, return: {"word": "", "score": 0, "newLetters": []}
  ''';
}