@opys/forge

Forge mod loader plugin — handles both the 1.7–1.12 legacy installer era and the 1.13+ processor era.

npm install @opys/forge

import { defineConfig } from '@opys/dev';
import { forge } from '@opys/forge';
import { java } from '@opys/java';

export default defineConfig({
  output: 'opys.json',
  plugins: [forge('1.20.1-best'), java('17')],
  manifest: {
    command: ({ java }) => java.bin,
    args: ({ forge }) => [forge.jvmArgs, forge.mainClass, forge.gameArgs],
    workdir: '${game_directory}',
  },
});

forge('1.20.1-best') accepts the same selectors Forge's own metadata service does: a full version (1.20.1-47.4.20), a per-MC shortcut (1.20.1-best, 1.20.1-latest, 1.20.1-recommended), or just the MC version (1.20.1) for the recommended build.

Part of the opys toolkit; re-exported by @opys/minecraft.