Fix launcher backend parsing and yt-dlp overrides

launcher/config/args-normalizer.ts

@@ -49,10 +49,17 @@ function parseLogLevel(value: string): LogLevel {
 }
 
 function parseBackend(value: string): Backend {
-  if (value === 'auto' || value === 'hyprland' || value === 'x11' || value === 'macos') {
+  if (
+    value === 'auto' ||
+    value === 'hyprland' ||
+    value === 'sway' ||
+    value === 'x11' ||
+    value === 'macos' ||
+    value === 'windows'
+  ) {
     return value as Backend;
   }
-  fail(`Invalid backend: ${value} (must be auto, hyprland, x11, or macos)`);
+  fail(`Invalid backend: ${value} (must be auto, hyprland, sway, x11, macos, or windows)`);
 }
 
 function parseDictionaryTarget(value: string): string {

launcher/config/cli-parser-builder.test.ts

@@ -17,20 +17,20 @@ test('resolveTopLevelCommand respects the app alias after root options', () => {
 });
 
 test('parseCliPrograms keeps root options and target when no command is present', () => {
-  const result = parseCliPrograms(['--backend', 'x11', '/tmp/movie.mkv'], 'subminer');
+  const result = parseCliPrograms(['--backend', 'windows', '/tmp/movie.mkv'], 'subminer');
 
-  assert.equal(result.options.backend, 'x11');
+  assert.equal(result.options.backend, 'windows');
   assert.equal(result.rootTarget, '/tmp/movie.mkv');
   assert.equal(result.invocations.appInvocation, null);
 });
 
 test('parseCliPrograms routes app alias arguments through passthrough mode', () => {
   const result = parseCliPrograms(
-    ['--backend', 'macos', 'bin', '--anilist', '--log-level', 'debug'],
+    ['--backend', 'windows', 'bin', '--anilist', '--log-level', 'debug'],
     'subminer',
   );
 
-  assert.equal(result.options.backend, 'macos');
+  assert.equal(result.options.backend, 'windows');
   assert.deepEqual(result.invocations.appInvocation, {
     appArgs: ['--anilist', '--log-level', 'debug'],
   });

launcher/config/cli-parser-builder.ts

@@ -43,7 +43,7 @@ export interface CliInvocations {
 
 function applyRootOptions(program: Command): void {
   program
-    .option('-b, --backend <backend>', 'Display backend')
+    .option('-b, --backend <backend>', 'Display backend (auto, hyprland, sway, x11, macos, windows)')
     .option('-d, --directory <dir>', 'Directory to browse')
     .option('-a, --args <args>', 'Pass arguments to MPV')
     .option('-r, --recursive', 'Search directories recursively')

launcher/mpv.test.ts

@@ -8,6 +8,7 @@ import { EventEmitter } from 'node:events';
 import type { Args } from './types';
 import {
   cleanupPlaybackSession,
+  detectBackend,
   findAppBinary,
   launchAppCommandDetached,
   launchTexthookerOnly,
@@ -56,6 +57,22 @@ function createTempSocketPath(): { dir: string; socketPath: string } {
   return { dir, socketPath: path.join(dir, 'mpv.sock') };
 }
 
+function withPlatform<T>(platform: NodeJS.Platform, callback: () => T): T {
+  const originalDescriptor = Object.getOwnPropertyDescriptor(process, 'platform');
+  Object.defineProperty(process, 'platform', {
+    configurable: true,
+    value: platform,
+  });
+
+  try {
+    return callback();
+  } finally {
+    if (originalDescriptor) {
+      Object.defineProperty(process, 'platform', originalDescriptor);
+    }
+  }
+}
+
 test('mpv module exposes only canonical socket readiness helper', () => {
   assert.equal('waitForSocket' in mpvModule, false);
 });
@@ -102,6 +119,12 @@ test('parseMpvArgString preserves empty quoted tokens', () => {
   ]);
 });
 
+test('detectBackend resolves windows on win32 auto mode', () => {
+  withPlatform('win32', () => {
+    assert.equal(detectBackend('auto'), 'windows');
+  });
+});
+
 test('launchTexthookerOnly exits non-zero when app binary cannot be spawned', () => {
   const error = withProcessExitIntercept(() => {
     launchTexthookerOnly('/definitely-missing-subminer-binary', makeArgs());

launcher/mpv.ts

@@ -227,6 +227,7 @@ export function makeTempDir(prefix: string): string {
 
 export function detectBackend(backend: Backend): Exclude<Backend, 'auto'> {
   if (backend !== 'auto') return backend;
+  if (process.platform === 'win32') return 'windows';
   if (process.platform === 'darwin') return 'macos';
   const xdgCurrentDesktop = (process.env.XDG_CURRENT_DESKTOP || '').toLowerCase();
   const xdgSessionDesktop = (process.env.XDG_SESSION_DESKTOP || '').toLowerCase();

launcher/types.ts

@@ -68,7 +68,7 @@ export const DEFAULT_MPV_SUBMINER_ARGS = [
 ] as const;
 
 export type LogLevel = 'debug' | 'info' | 'warn' | 'error';
-export type Backend = 'auto' | 'hyprland' | 'x11' | 'macos';
+export type Backend = 'auto' | 'hyprland' | 'sway' | 'x11' | 'macos' | 'windows';
 export type JimakuLanguagePreference = 'ja' | 'en' | 'none';
 
 export interface LauncherAiConfig {