# OpenSpec Change: enterprise-gaming-r3f-inventory

- **Change ID**: enterprise-gaming-r3f-inventory
- **Package**: `@suaveplan/r3f-inventory`
- **Category**: gaming/gameplay
- **Target path**: `gaming/gameplay/r3f-inventory`
- **Status**: PROPOSED
- **Date**: 2026-04-24

---

## Summary

Deliver `@suaveplan/r3f-inventory` on the genesis branch from scratch at enterprise quality. The package provides a 3D grid-based inventory rendered inside a React Three Fiber scene or as an HTML overlay: `InventoryGrid` with configurable cell size and slot count, `ItemMesh` showing a 3D model preview of each item, `EquipmentSlots` with body-region anchors, `LootTable` drop-chance visualization, and `useInventory()` backed by a framework-agnostic `InventoryManager`. Drag-and-drop reordering, stack splitting, and equipment slot restriction rules are enforced by the manager. Genesis adds 100% coverage and Storybook stories.

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## Available workspace deps

`@suaveplan/error`, `@suaveplan/types`, `@suaveplan/events`, react, `@react-three/fiber`, `@react-three/drei`, three.

---

## Public API surface

```ts
interface InventoryItem {
  id: string
  name: string
  stackSize: number
  maxStack: number
  equipSlot?: EquipmentSlot
  modelUrl?: string
  iconUrl?: string
}

type EquipmentSlot = 'head' | 'chest' | 'legs' | 'feet' | 'mainHand' | 'offHand' | 'ring' | 'neck'

function createInventoryManager(options: InventoryOptions): InventoryManager

function InventoryGrid(props: InventoryGridProps): JSX.Element
function EquipmentSlots(props: EquipmentSlotsProps): JSX.Element
function ItemMesh(props: ItemMeshProps): JSX.Element
function LootTableDisplay(props: LootTableDisplayProps): JSX.Element

function useInventory(): InventoryState & { manager: InventoryManager }
```

---

## File layout

```text
gaming/gameplay/r3f-inventory/
  package.json / tsconfig.json / vitest.config.ts
  src/
    index.ts / error-codes.ts
    types/common.ts + md
    state/inventory-manager.ts + md + test
    hooks/use-inventory.ts + md + test
    components/
      InventoryGrid/ (tsx + md + test + stories + index)
      EquipmentSlots/ (tsx + md + test + stories + index)
      ItemMesh/ (tsx + md + test + stories + index)
      LootTableDisplay/ (tsx + md + test + stories + index)
  tests/integration.test.ts
```