Important
Concrete is archived and no longer maintained. Its successor is Mortar (mortar.rethunk.tech), a desktop mod manager rebuilt from scratch for several games. Mortar supports Stardew Valley today; Lethal Company support is planned for a later release.
Concrete is a desktop mod manager for Lethal Company from LethalModding.com. It discovers your Steam library, curates ThunderStore mods, and launches the game with profile-specific BepInEx plugin sets.
Built with Wails (Go backend, embedded Next.js UI).
LOGXI=* wails devSee HUMANS.md for prerequisites, first-time setup, and dev workflow.
- Steam library and Lethal Company install detection (Linux and Windows)
- Mod profiles with enabled/disabled plugin lists and launch instructions
- ThunderStore recommended-mod integration via a local loopback API
- Single-instance desktop app with translucent dark UI (Material UI + Next.js)
| Topic | Location |
|---|---|
| Install, prerequisites, dev mode | HUMANS.md |
| Code layout and invariants | AGENTS.md |
| License | LICENSE.txt |
Copyright (c) LethalModding.com. Licensed under CC BY-NC-SA 2.0.