Smart Inventory System

Most inventory assets ask you to build your game their way. This one is

designed to disappear into a project that already exists.

The logic layer is plain C# that cannot reference UnityEngine at all — that

is an assembly setting, not a promise. Above it sit thin MonoBehaviour

adapters, a uGUI layer you can replace outright, and a persistence layer

that hands you a serializable snapshot and gets out of the way. Your save

system stays yours. Your UI stays yours.

What that buys you in practice:

• Items resolve by id at runtime, so renaming, moving or re-importing a

  ScriptableObject never invalidates a save file.

• Any rule you can think of — weight, category, quest state, player level —

  is a one-method interface that returns a reason string you can show the

  player. Weight and category rules ship as working examples.

• Equipment is not a second system. It is an ordinary container carrying

  per-slot restrictions, so it inherits events, saving, grid rendering,

  drag and drop and tooltips without a line of equipment-specific UI code.

• The drop highlight is produced by the same calculation that performs the

  drop, so a green slot is never followed by a refusal.

Measured on a 2019 i5 laptop, every gameplay operation — add, remove, move,

transfer, drop preview — runs in well under a microsecond and allocates

zero bytes, so dragging items around cannot contribute to a GC spike. A

full 200-slot inventory serialises to 8.5 KB.

Open the included demo scene and press Play. There is nothing to configure

first.

Deliberately not in this version: crafting, vendors, loot tables,

durability, hotbar widgets and gamepad navigation. The architecture leaves

hooks for all of them and none is half-present in the package.

Requires TextMeshPro Essential Resources

(Window > TextMeshPro > Import TMP Essential Resources).