### Short description
**Grid-based backpacks** — a Tarkov-style inventory where every item occupies a **w×h footprint** and you arrange gear in a grid. Six backpack sizes (small → giant) open a grid you drag items into; oversized items need space to fit. Item footprints are **extensible via DoxCore**: other mods register their own item sizes, so ammo, magazines, healing items, etc. size correctly when those mods are present. If **TACZ** is installed, guns are auto-sized per gun; if **DoxPartHealth** is installed, a part-health bar overlays the backpack screen. Works standalone — unknown items default to 1×1.
### Features
- **Grid inventory** with per-item w×h footprints; 6 backpack tiers (2×3 → 5×8).
- **Extensible item sizes** — `DoxCore.DoxItemSize` registry; producer mods register their items' sizes (soft, addon-style).
- **TACZ gun sizing** (optional) — pistols/SMGs/rifles/snipers/LMGs sized per gun id.
- **Part-health overlay** (optional, DoxPartHealth) in the backpack screen.
- **Refit** and mirrored-container flows; server-authoritative grid with client sync.
- **Translated into 20 languages** — the grid screen and item tooltips, including body part names that used to be hardcoded and could not be changed even with a resource pack.
### Minecraft versions
1.20.1 (Forge) only for now. The other Dox mods also have a 1.21.1 / NeoForge line (2.x); this one has not been ported yet.
### Requirements
- **DoxCore** (required). DoxPartHealth / TACZ optional (enhance when present; nothing breaks when absent).
### For modders
- `DoxCore.api.DoxItemSize.register(predicate, w, h, stackable)` — declare your item's backpack footprint.
