SimpleItemGenerator

items:
  loreitem0:
    item:
      material: BLAZE_ROD
      name: <red><bold>Your custom item
      lore:
      - <rainbow>Your imagination is your limitation</rainbow>
      - '<gradient:red:blue>when you are using minimessage' 

items:
  loreitem1:
    item:
      material: BLAZE_ROD
      name: <aqua><bold>1.8 MiniMessage support
      lore:
      - '<gradient:red:blue>With some color limitations due to'
      - '<gradient:green:white>the way how items work at 1.8'

items:
  loreitem2:
    item:
      material: BLAZE_ROD
      name: '<green><bold>SIG has <aqua>PAPI</aqua> auto-update'
      lore:
      - '<light_purple>For instance:'
      - "<aqua>Played time:<red><bold>%player_seconds_lived%</red> seconds"
      - "<aqua>Player`s name: <red><bold>%player_name%</red>"
      - "<aqua>Server time: <red><bold>%server_time_HH:mm:ss%</red>"

items:
  interactable-item:
    item:
      material: BLAZE_ROD
      name: <red><bold>Custom item
    usage:
    - predicate:
        at: air
        button: left
      commands: '[console] tellraw %player%  %minimessage_<green>You clicked at <white>AIR</white> with <blue>LEFT</blue> button%'
    - predicate:
        at: air
        button: right
      commands: '[console] tellraw %player%  %minimessage_<green>You clicked at <white>AIR</white> with <red>RIGHT</red> button%'
    - predicate:
        at: air
        button: drop
      commands: '[console] tellraw %player%  %minimessage_<green>You clicked at <white>AIR</white> with <gold>DROP</gold> button%'
    - predicate:
        at: block
        button: left
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <dark_gray>BLOCK</dark_gray> with <blue>LEFT</blue> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: block
        button: right
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <dark_gray>BLOCK</dark_gray> with <red>RIGHT</red> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: block
        button: drop
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <dark_gray>BLOCK</dark_gray> with <gold>DROP</gold> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: entity
        button: left
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <color:#ff96b4>ENTITY</color> with <blue>LEFT</blue> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: entity
        button: right
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <color:#ff96b4>ENTITY</color> with <red>RIGHT</red> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: entity
        button: drop
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <color:#ff96b4>ENTITY</color> with <gold>DROP</gold> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: player
        button: left
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <color:#ff7b1c>PLAYER</color> with <blue>LEFT</blue> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: player
        button: right
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <color:#ff7b1c>PLAYER</color> with <red>RIGHT</red> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: player
        button: drop
      commands:
      - '[console] tellraw %player%  %minimessage_<green>You clicked at <color:#ff7b1c>PLAYER</color> with <gold>DROP</gold> button%'
      - '[console] tellraw %player% %minimessage_<color:#8769ff>The target`s position is <red>%target_x% %target_y% %target_z%</red>%'
    - predicate:
        at: player
      commands:
      - '[console] tellraw %player%  %minimessage_<color:#9eff0d>The player`s name is <color:#ff7b1c>%player_target%</color>%'

items:
  helmet:
    item:
      material: GOLDEN_HELMET
      name: '<dark_green><bold>SIG is general purpose'
      lore:
      - '<green>It means that you can use it'
      - '<green>not only for <light_purple><bold>hub</light_purple> items,'
      - '<green>but also for <light_purple><bold>minigames</light_purple>, <light_purple><bold>survival</light_purple>'
      - '<green>or even <light_purple><bold>MCMMORPG</light_purple>!'
      enchantments:
        minecraft:protection: 2
      unbreakable: true
      attributes:
      - operation: ADD_VALUE
        name: health
        attribute: MAX_HEALTH
        amount: 5
        slot: HEAD
      - operation: ADD_VALUE
        name: armor
        attribute: ARMOR
        amount: 2
        slot: HEAD
    usage:
      cancel: false
  chestplate:
    item:
      material: DIAMOND_CHESTPLATE
      name: '<dark_red><bold>Set up your items'
      lore:
      - '<red>You can make items <blue>unbreakable</blue>,'
      - '<red>with <blue>enchantments</blue> or <blue>attributes</blue>.'
      enchantments:
        minecraft:protection: 10
        minecraft:fire_protection: 5
      unbreakable: true
      attributes:
      - operation: ADD_VALUE
        name: toughness
        attribute: ARMOR_TOUGHNESS
        amount: 40
        slot: CHEST
      - operation: ADD_VALUE
        name: armor
        attribute: ARMOR
        amount: 70
        slot: CHEST
    usage:
      cancel: false
  leggings:
    item:
      material: IRON_LEGGINGS
      name: '<dark_purple>Hide unwanted lore components'
      lore:
      - "<light_purple>Usually, you don't want players to see"
      - "<light_purple>enchantments, attributes or unbreakability."
      - "<light_purple>For that purpose you can use <aqua>item flags</aqua>!"
      - ""
      - "<light_purple>By the way, this item is glowing."
      unbreakable: true
      enchantments:
        minecraft:fortune: 1
      item-flags:
      - HIDE_UNBREAKABLE
      - HIDE_ENCHANTS
      - HIDE_ATTRIBUTES
    usage:
      cancel: false
  sword:
    item:
      material: NETHERITE_SWORD
      cmd: 1
      name: '<color:#ff7c17>Use textures</color>'
      lore:
      - '<color:#ffa861>Apply <color:#88aa3a>custom model data</color></color>'
      - '<color:#ffa861>to your custom items.</color>'
      - '<color:#ffa861>So you would be able</color>'
      - '<color:#ffa861>to use texture packs.</color>'
      - ''
      - '<dark_red>Disclaimer! Texture pack</dark_red>'
      - '<dark_red>auto-generation is not</dark_red>'
      - '<dark_red>yet supported.</dark_red>'
      unbreakable: true
      item-flags:
      - HIDE_UNBREAKABLE
      - HIDE_ENCHANTS
      - HIDE_ATTRIBUTES
    usage:
      cancel: false

Textures of the latest example can be found here