diet

name	diet
description	Record and track daily nutrition intake through food photos. Analyze nutritional content including calories, protein, fat, carbohydrates, vitamins, and minerals. Use when user wants to log meals, track nutrition, or analyze dietary habits.

Diet and Nutrition Tracking Skill

Record daily meals through photos or uploads, automatically analyze nutritional content, and track nutritional intake.

Core Flow

User Input → Identify Operation Type → [add] Analyze Image → Nutrition Analysis → Save Record
                              ↓
                         [history/status/summary] → Read Data → Display Report

Step 1: Parse User Input

Operation Type Recognition

Input Keywords	Operation Type
add	add - Add diet record
history	history - View history records
status	status - Nutrition statistics
summary	summary - Nutrition summary

Meal Classification (Based on Meal Time)

Time Range	Meal Type
05:00 - 09:59	Breakfast
10:00 - 14:59	Lunch
15:00 - 16:59	Afternoon Tea
17:00 - 21:59	Dinner
22:00 - 04:59	Late Night Snack

Step 2: Check Information Completeness

For add operation, required:

• image - Food photo path

For add operation, optional:

• meal_time - Meal time (defaults to current time)

For history/status/summary operations:

• No parameters required, optional time range

Step 3: Interactive Prompts (If Needed)

Scenario A: No Image Provided

Please provide a food photo. You can drag and drop or specify the path.

Scenario B: Invalid Image Path

Cannot read the image. Please check if the path is correct.
Supported formats: JPG, PNG, WebP

Scenario C: Invalid Time Format

Invalid time format. Please use HH:mm or YYYY-MM-DD HH:mm format
Example: 12:30 or 2025-12-30 12:30

Step 4: Generate JSON

Diet Record Data Structure

{
  "id": "20251231123456789",
  "record_date": "2025-12-31",
  "meal_time": "12:30",
  "meal_type": "Lunch",
  "image_path": "food.jpg",
  "foods": [
    {
      "name": "Rice",
      "portion": "1 bowl (about 150g)",
      "weight_estimate": 150,
      "cooking_method": "Steamed",
      "confidence": 0.95
    }
  ],
  "nutrition": {
    "calories": {
      "value": 485,
      "unit": "kcal"
    },
    "macronutrients": {
      "protein": { "value": 15.2, "unit": "g" },
      "fat": { "value": 18.5, "unit": "g" },
      "carbohydrate": { "value": 60.3, "unit": "g" },
      "fiber": { "value": 6.2, "unit": "g" }
    },
    "vitamins": {
      "vitamin_a": { "value": 245, "unit": "μg" },
      "vitamin_c": { "value": 35, "unit": "mg" }
    },
    "minerals": {
      "calcium": { "value": 45, "unit": "mg" },
      "iron": { "value": 2.8, "unit": "mg" }
    }
  },
  "health_score": {
    "overall": 7.5,
    "balance": 8.0,
    "variety": 7.0,
    "nutrition_density": 7.5
  }
}

Step 5: Save Data

1. Generate file path: data/diet-records/YYYY-MM/YYYY-MM-DD_HHMM.json
2. Create month directory (if not exists)
3. Save JSON data file
4. Update global index data/index.json

Execution Instructions

1. Parse user input, identify operation type
2. For add operation:
   a. Use Read tool to read image
   b. Analyze food types and portions
   c. Calculate nutritional content
   d. Save record to data/diet-records/
3. For history operation: Display diet history
4. For status operation: Display nutrition statistics
5. For summary operation: Display nutrition summary

Nutrition Reference

Common Staple Food Portions

• 1 bowl rice ≈ 150g (180 kcal)
• 1 bowl noodles ≈ 200g (220 kcal)
• 1 steamed bun ≈ 100g (220 kcal)

Meat Portions

• Pork 100g ≈ 250 kcal
• Chicken 100g ≈ 130 kcal
• Fish 100g ≈ 100 kcal

Vegetable Portions

• Leafy vegetables 1 serving ≈ 200g (40 kcal)
• Root vegetables 1 serving ≈ 200g (80 kcal)

Adult Daily Nutrition Recommendations

Macronutrients

• Calories: 1800-2400 kcal
• Protein: 55-75 g
• Fat: 55-75 g
• Carbohydrates: 250-350 g
• Dietary Fiber: 25-35 g

Major Vitamins

• Vitamin A: 700-900 μg
• Vitamin C: 100 mg
• Vitamin D: 10-20 μg

Major Minerals

• Calcium: 800-1000 mg
• Iron: 12-18 mg
• Zinc: 10-15 mg

For more examples, see examples.md.