Build or repair game inventory and equipment systems, including item pickup, stacking, drag and drop, and saving. It guides transfers that fully succeed or leave state unchanged, accessible controls, and tests for item loss or duplication.
Build or repair game inventory, loot, equipment, tooltips, drag-and-drop, persistence, and progression systems. Use for item schemas, pickup flows, stack rules, equipment slots, atomic swaps, save migration, and no-loss regression testing.
Review the instructions the agent will receive before you install.
Use one typed, serializable item source of truth and make every transfer atomic.
Model stable IDs, item definitions, ownership, stack limits, equipment compatibility, effects, rarity, presentation data, and migration version separately. Runtime UI must reference definitions by ID rather than duplicate stats or descriptions.
For pickup, equip, unequip, swap, drag/drop, consume, and sell:
Never remove an item before confirming a legal destination. Preserve item identity across a swap and prevent duplicate effect registration.
Expose slot compatibility, equipped state, quantity, tooltip facts, and failure feedback. Support keyboard and touch alternatives to drag-only interactions. Keep focus behavior, dialogs, and tooltips accessible.
Cover invalid destinations, full inventory, duplicate pickup, equip swap, mid-action swap, save/load, schema migration, reset/new game, tooltip updates, and repeated dispatch. Validate that total owned item identity is conserved except for explicit consumption or reward rules.
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