Changelog

1.2.0

New: Forge backpack. A forge you carry in your bag: craft it at a forge, upgrade it there to level 7 with the forge upgrades' costs, and it goes down beside the Workbench backpack when you set that down. Set down, it's a forge of its level (craft, upgrade, repair). Shift + E on either packs up both. Durability like the workbench backpack.
Lighter: the Workbench backpack now weighs 30 (was 50) and slows you 15% (was 25%); the forge backpack adds its own 30 and 15%. Settings still at the old defaults move to the new ones once.
New settings: Forge weight, Forge slower while carried, Forge craft cost.
Not compatible with 1.1.x: the server and every player need 1.2.x.

Packing a stonecutter into the backpack works with a full inventory (it never goes into your bag, so it no longer says "inventory full").
With Shack Recycler 1.1.1, recycling a backpack that has a stonecutter also gives back the stonecutter's materials.
Works together with 1.1.0: players and the server can be on either.

Valheim 1.0.20: Tab crafting from the worn backpack works again (the game changed how crafting checks for cheats, and 1.0.0 turned Tab crafting off to stay safe).
Durability: 100 at level 1, +50 per level. Every craft, upgrade or repair done at the backpack uses 1. Broken, it does nothing until repaired at another workbench of at least its level (never at itself). Backpacks from 1.0.0 start full.
Stonecutter: a new recipe at a real stonecutter packs one into the backpack for the stonecutter's build cost. Stone pieces can then be built around it, worn or set down; it weighs 10 more, and the crafting panel reads "Workbench + Stonecutter".
The slowdown now applies whenever the backpack is in your inventory, not only while worn.
The set-down key is now U: G is also the game's radial menu key and did both. Old G settings move to U.
Packing up takes a moment, like equipping gear.
The bench on your back, on the ground and while placing no longer looks glitched.
New settings: Durability, Durability per level, Wear per use, Repair needs its level, Stonecutter weight, Stonecutter build radius. "Slower while worn" is now "Slower while carried".
Not compatible with 1.0.x: the server and every player need 1.1.x.

First release. A workbench you carry: crafted at the workbench (10 Wood, 2 Deer hide) and upgraded there to level 5, each upgrade costing what the matching workbench upgrade costs (Chopping block, Tanning rack, Adze, Tool shelf).
Worn in the utility slot: weighs 50, 25% slower, shows on your back, Tab opens the workbench menu at its level, and the hammer builds around you.
Set down from the hotbar, a quick slot or G: a half-width workbench of the same level. Shift+E packs it up; the hammer or destruction drops the backpack instead of wood.
Settings sync from the server. The server and every player need this mod.