koring-launcher/AGENTS.md

koring-launcher

Minecraft launcher built with Electron + React 19 + TypeScript + Node.js (@xmcl).

Quick commands

pnpm dev                # full app dev (renderer + main process)
pnpm dev:renderer       # frontend only (vite, port 1420)
pnpm dev:main           # electron main process only
pnpm build              # production build (vite + tsc)
pnpm dist:dev           # dev icon + Windows installer
pnpm dist:beta          # beta icon + Windows installer
pnpm dist:run           # production icon + Windows installer

Architecture

• Frontend (src/): React 19 + Vite 7 + Tailwind v4 + shadcn/ui + Zustand stores
• Main Process (electron/): Node.js/TypeScript, manages windows, IPC handlers, @xmcl/* packages
• Icon System (public/icons/{dev,beta,run}/): Mode-specific icons, copied to build/ at build time
• IPC: Frontend → ipcRenderer.invoke() → ipcMain.handle() → main process → webContents.send() → Frontend

Key gotchas

• Electron main process: electron/main.ts is the entry point. All @xmcl/* packages run here.
• Preload script: electron/preload.ts exposes window.electronAPI via context bridge.
• IPC handlers: All handlers are in electron/handlers/ directory.
• Mutable win ref: electron/main.ts uses a mutable win object — handlers read win.mainWindow at runtime, not at registration time.
• Config: YAML format (Koring.yml) stored next to executable. Sparse save (only non-default values).
• Auth: JSON file (koring-auth.json) stored next to executable.
• Path alias: @/ maps to src/ (configured in vite.config.ts and tsconfig.json).
• Dev mode: Vite runs on port 1420, Electron loads from localhost.
• Asset paths: Use import.meta.env.BASE_URL prefix for public assets. Absolute paths break in packaged app.

Build & bundle

pnpm build              # Vite build + TypeScript compile
pnpm dist:dev           # switch-icon dev + electron-builder Windows installer
pnpm dist:beta          # switch-icon beta + electron-builder Windows installer
pnpm dist:run           # switch-icon run + electron-builder Windows installer

Each dist:* command runs: pnpm build → pnpm icon:{mode} → electron-builder --win

Icon switching

public/icons/
  dev/icon.ico, icon.png
  beta/icon.ico, icon.png
  run/icon.ico, icon.png

build/                   ← generated by switch-icon.js (gitignored)
  icon.ico
  icon.png

electron-builder.yml uses buildResources: build to read icons from build/.

Electron notes

• electron/main.ts: App entry, window management, splash→main transition (ready-to-show + 1.5s min)
• electron/preload.ts: Context bridge for secure IPC
• electron/config.ts: YAML config management (sparse save)
• electron/auth.ts: Auth data persistence (JSON file)
• electron/core/: @xmcl/* integrations (auth, installer, launcher, modrinth, instance)
• electron/core/background-image.ts: 背景图处理服务（自选背景降采样/重编码，程序本体资源管理）
• electron/handlers/: IPC handlers (config, auth, install, launch, mods, instance, background, task, system, window)

Frontend notes

• src/api/ipc.ts: Core IPC utilities (invoke, onIpcEvent)
• src/api/*.ts: API modules wrapping IPC calls
• src/stores/: Zustand state management
• src/resources/: 启动器程序本体「资源管理」子系统（与游戏无关）：
  • registry.ts 资源注册表服务（acquire/release、引用计数、预算 + LRU 逐出、onRelease 释放回调）
  • store.ts 注册表 → zustand 镜像（调试面板消费）
  • image.ts 图片解码管线（按显示尺寸降采样）、hooks.ts/ManagedImage.tsx 复用组件（供列表缩略图）
  • 当前接线点：BackgroundLayer 把当前背景登记为 background 类资源；主进程 background:prepare 在进渲染端前压小大图
  • 监控入口：debug 页「资源与内存」(debug-resource)
• src/hooks/useTheme.ts: Dark mode sync with Electron theme
• src/components/system/WindowControls.tsx: Custom window controls (min/max/close), uses <button> with WebkitAppRegion: "no-drag"
• src/components/system/TitleBar.tsx: Custom title bar with navigation, uses WebkitAppRegion: "drag"
• src/lib/mode.ts: Build mode constants (DEFAULT_BG, LOGO_SVG, APP_ICON, BUILD_MODE)