ChestProgression

Grillspett Chest Progression

BepInEx + Jotunn mod for Valheim. Adds a Chest Upgrade Table where you pay

materials to permanently increase the storage capacity of every basic

(wood) chest — existing ones and any built afterwards, world-wide, for

every player. No more digging through old chests to move everything into a

bigger one every time you unlock a new metal.

How it works

Build a Chest Upgrade Table with the Hammer (10 Fine Wood by default, no

other crafting station needed — same as the plain Workbench). Standing near

it opens five upgrade recipes, one per metal:

| Upgrade | Cost (default) |

|---|---|

| Bronze | 30 Bronze bars |

| Iron | 30 Iron bars |

| Silver | 30 Silver bars |

| Black Metal | 30 Black Metal bars |

| Flametal | 30 Flametal bars |

Crafting one of these consumes the listed bars and instantly advances

every basic chest — the ones you already built as well as any built

afterwards — one step up a shared size progression:

5x2 (vanilla) -> 6x3 -> 6x4 -> 8x4 -> 8x5 -> 8x6

Each of the five upgrades is an independent unlock, not a dependency

chain, and which ones you buy doesn't matter — only how many. Buying

only Silver, with Bronze and Iron never touched, lands on the first step

(6x3), exactly as buying only Bronze would. Buy a second one (any of the

remaining four) and every chest advances to the second step (6x4), and so

on up to the fifth step (8x6) once all five have been bought.

As in vanilla, a recipe only shows up once you've picked up that material at

least once (Valheim's own "known material" system — nothing this mod has to

implement). Once an upgrade is bought, its recipe disappears for everyone, so

there's no way to waste materials buying the same one twice.

Multiplayer correctness

Chest capacity is derived entirely from world state that Valheim itself

keeps in sync across every connected client and the dedicated server (the

same ZoneSystem "global key" mechanism vanilla uses for boss-kill flags),

never from anything local to one player's game. That's what guarantees two

players never disagree about how big a given chest is — which matters,

because if they did, one player could store items in slots the other

player's client doesn't render, and neither of them would be able to see or

retrieve them reliably.

Concretely: buying an upgrade sets a global key, which Valheim broadcasts to

every peer; every peer (including the dedicated server) reacts to that same

broadcast by resizing its own currently-loaded chests and re-checking every

chest as it loads — so it doesn't matter who bought the upgrade or who was

standing where when it happened.

The costs and the target chest prefab name are also configured as

admin-only/synced settings (via Jotunn's SynchronizationManager): a client

can't quietly lower their own cost or point the mod at a different prefab

than everyone else — the server's config values win.

Known limitation: like any Valheim mod that adds crafting recipes,

requirement checking (do you have enough bars) happens on the crafting

client, not the server — this is a property of Valheim's netcode in

general, not something specific to this mod.

Configuration

Settings are written to

BepInEx/config/grillspett.valheim.chestprogression.cfg after the first

run. All entries are server-synced (see above) — only the server's/host's

values take effect for everyone.

| Setting | Default | Description |

|---|---|---|

| UpgradeTableFineWoodCost | 10 | Fine Wood to build the Chest Upgrade Table. |

| BronzeUpgradeCost | 30 | Bronze bars for the Bronze upgrade (worth one progression step). |

| IronUpgradeCost | 30 | Iron bars for the Iron upgrade (worth one progression step). |

| SilverUpgradeCost | 30 | Silver bars for the Silver upgrade (worth one progression step). |

| BlackMetalUpgradeCost | 30 | Black Metal bars for the Black Metal upgrade (worth one progression step). |

| FlametalUpgradeCost | 30 | Flametal bars for the Flametal upgrade (worth one progression step). |

| TargetChestPrefab | piece_