1. Setup

Before using the commands, you must create the scoreboard objective mentioned in the script:

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/scoreboard objectives add item_count dummy "Item Counter"
/scoreboard objectives setdisplay sidebar item_count

2. How to Count a Chest

Use this command to scan a container (chest, barrel, hopper) at specific coordinates:

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/scriptevent my:count <x> <y> <z>

Example: /scriptevent my:count 10 64 10
Result: The scoreboard will show entries like c_10_64_10: iron_ingot with the total amount found in that chest.

3. How to Count a Player's Inventory

Use this command to scan the inventory of the person who runs it (or the person targeted by a command block):

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/scriptevent my:count_player

Example: Run this in chat.
Result: If your name is "Steve" and you have 5 Apples, the scoreboard will show Steve: apple 5.

4. Key Features

Automatic Cleanup: If you remove all diamonds from a chest and run the command again, the diamond entry will be deleted from the scoreboard automatically.
Short Names: It automatically removes the minecraft: prefix to keep the scoreboard tidy (e.g., minecraft:dirt becomes just dirt).
Persistent Totals: It sums up all stacks. If you have three stacks of 64 cobblestones, it will show a single entry with the value 192.