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satisfy edited this page Oct 21, 2026
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Foundation holds the things every Let's Do mod needs but no single mod should own: HUD panels, tooltips, seats, storage shelves, food with effects, particles, banners and a handful of helpers.
| Area | Package | What it gives you | Guide |
|---|---|---|---|
| Ambience | ambient |
Fireflies around lanterns at night | Guide |
| Armor |
armor, client.armor
|
Textured and dyeable armor items, custom 3D armor models, armor sets with set tooltips | Guide |
| Banner | banner |
The Completionist Banner every mod gets | Guide |
| Blocks | block |
Facing, line-connecting, stackable, cake, berry bush, sink, wardrobe, dresser, window, shutter … | Guide |
| Config | client.gui |
Foundation's own tooltip config, Let's Do config start screen | Guide |
| Compostables | compostable |
Compostable items on Fabric and NeoForge | Guide |
| Creative tabs | client.creative |
Categories as side tabs on the left of your creative tab, framed tab tooltips | Guide |
| Flammables | flammable |
Make blocks burn like wood, wool, hay or plants, or with custom fire odds | Guide |
| Fog | client.fog |
Shared biome fog that blends between mods | Guide |
| Food | food |
Food & drinks with effects, placeable dishes, ingredient effects | Guide |
| HUD panels | overlay |
"Look at a block or entity, see what to do" panels, notices | Guide |
| Menus | menu |
Filtered slots, result slots with XP | Guide |
| Mimic blocks |
block.mimic, client.mimic
|
Blocks that take on the texture of an applied block or show a stored block | Guide |
| Mob AI | entity.ai |
Attack goal that waits for the animation, random idle actions | Guide |
| Model templates | assets/foundation/models |
Shared parent models for cabinets, drawers, tables and wall decorations | Guide |
| Particles |
particle, registry
|
Soup, steam, water, dye splash, feather, firefly, fly, drifting leaves/needles/fluff | Guide |
| Rarity | rarity |
Custom item rarities: solid, gradient and animated name colors, label line and tooltip frames | Guide |
| Recipes |
recipe, compat
|
Recipe unlock book, REI/JEI layout helpers | Guide |
| Seats |
seat, block
|
Chairs, benches, anything you can sit on | Guide |
| Storage | storage |
Shelves / racks that show their items, ready-made wall shelf | Guide |
| Tooltips | tooltip |
"Can be placed" + [SHIFT] details, coloured tooltip borders, attribute icons |
Guide |
| Utilities |
util, render, text, advancement
|
Registration, shapes, dyeing, item rendering, triggers … | Guide |
| Villager trades | trade |
Sell and buy trades for emeralds | Guide |
| Woods |
wood, client.wood
|
Signs, hanging signs, boats and chest boats for custom wood types | Guide |
| Zombie equipment | entity.equipment |
Items for spawning zombies, without your own mixin | Guide |
| Tag | Use | Guide |
|---|---|---|
#foundation:cake_cutters (item) |
items that cut slices off a SliceableCakeBlock
|
Blocks |
#foundation:attracts_fireflies (block) |
blocks that get fireflies at night | Ambience |
Coming from Farm & Charm's old helpers? See the migration table.