Add an item

Register an item definition with forge-items and grant it to a character.

Items are definitions (immutable, shared) plus instances (the actual stack a character holds). You register a definition once; you mint instances at runtime.

Register a definition

Call forge-items:RegisterItem from your content package at bootstrap, after forge-items is ready.

local fi = exports["forge-items"]

fi:RegisterItem({
  id        = "item:health_tonic",   -- stable, namespaced id
  type      = "consumable",
  label     = "Health Tonic",
  stackSize = 10,
  weight    = 0.2,
  rarity    = "common",
  tags      = { "drink" },

  -- optional: make it useable (consumed by forge-inventory's UseItem flow)
  useable = true,
  use     = { consume = true, cooldownSec = 1, outcome = { kind = "heal", amount = 25 } },
})

Definitions are open tables. Consumer packages read their own optional blocks, equip for forge-equipment, weapon for the combat/cast glue, use for the consumable flow, and forge-items rides unknown blocks along untouched.

Common fields

Field	Notes
id	Required. item:<name>.
type	Required. Creator-defined string (weapon, consumable, material, …).
label, weight, rarity	Display + inventory math. rarity must resolve to a registered rarity.
stackSize	Max per stack (default 1).
tags	Free-form strings; other systems match on them (e.g. focus.wand, equip.mainhand).
equipSlot / equip	Read by forge-equipment. See equip consequences.
useable / use	Read by forge-inventory’s UseItem flow.

Grant it to a character

Mint an instance, then add it to the character’s bag container (inv:<character_id>):

local fi = exports["forge-items"]
local fv = exports["forge-inventory"]

local instR = fi:CreateInstance("item:health_tonic", { quantity = 3 })
if instR.ok then
  fv:AddItem("inv:" .. characterId, instR.data.instance)
end

Equippable items

To make an item apply stats while worn, add an equip block, forge-equipment applies the modifiers as long as the item occupies an equip slot, and removes them on unequip:

fi:RegisterItem({
  id = "item:iron_ring", type = "misc", label = "Iron Ring",
  stackSize = 1, weight = 0.1, rarity = "common",
  equipSlot = "slot:ring1",
  equip = {
    modifiers   = { { attribute = "attr:strength", value = 2, op = "add" } },
    grantEffect = "effect:well_fed",   -- optional: apply an effect while equipped
  },
})

Ship your own neutral default items by adding them to forge-items’ shared/data/items.lua and keeping ShipDefaults = true, same registration path, just framework-owned. See the content model.

Next: add an effect