Inventory System Grid Hotbar Drag Stack Kit

A server-authoritative slot inventory: a grid + a hotbar, one stack per slot, items stacking up to their MaxStack. DRAG a slot onto another to move, drop on the SAME item to stack, on a DIFFERENT one to swap; SORT tidies up. The SERVER owns every slot and validates each move - a client can never fabricate an item or overfill a stack. Drag 5 things and press Play - no code. Your inventory (seeded from Starting) is a grid + hotbar you rearrange by dragging. EDIT ITEMS with no code: each Color3Value in Items is one item (Name = item, Value = swatch colour, MaxStack Attribute = the cap). Set grid/hotbar sizes on InvConfig; seed with IntValues under Starting. Names are yours - map them to your own models. Give items from your own server code (unspoofable); clients only move/sort. SESSION: inventory resets on server close - a SAVE HOOK line shows where to persist. ONE server Script, ONE client LocalScript, no external services. For RPG, survival and tycoon games.