Prefab Hammer

Prefab Hammer is an advanced construction utility for Valheim. It allows players to capture custom build combinations (prefabs/blueprints) directly from their existing structures, name them, manage them in a catalog, and build them using standard resource calculations.

Features

Manual Component Selection: Aim at built pieces and press J to select them one-by-one with a pulsating green outline.
Exact Geometry Outlines: Selection highlights clone the piece's actual visual meshes, making the green transparent overlay conform precisely to floors, sloped roofs, beams, and custom shapes.
Name & Save Dialog: Press K to open the solid-colored popup manager, name your creation, and save it.
Prefab Library Catalog: View your blueprints in a scrollable list, delete them safely with confirm prompts, or open the catalog using Delete or Shift + K.
Unequip Cleanup: Switching away from the Hammer automatically clears outlines and selections to prevent world clutter.
Radius Fallback: Pressing the save hotkey without selecting anything falls back to saving all pieces in a radius.
Chat Commands: Use /prefablist, /prefabsave, /prefabreload, and /prefabdelete.

Keybinds (Configurable)

J: Toggle manual piece selection (must hold Hammer).
K: Open save panel / Prefab Manager.
Delete or Shift + K: Open Library Catalog directly.

Installation

Prefab Hammer requires BepInEx to run.

Install BepInExPack Valheim.
Place PrefabHammer.dll into the BepInEx/plugins/ directory (or download directly via r2modman).