it('splits npx package into command and args and keeps Windows-safe command normalization', () => {
    const config = createGenericSpawnConfig('npx @pkg/cli', '/cwd', ['--acp'], undefined, { PATH: '/usr/bin' });

    expect(config.command).toBe('chcp 65001 >/dev/null && npx');

const packageName = npxPackage.split('@')[0] || npxPackage;

const withoutVersion = npxPackage.replace(/@[\d][^/]*$/, '');
const slashIndex = withoutVersion.lastIndexOf('/');
const bareName = slashIndex >= 0 ? withoutVersion.slice(slashIndex + 1) : withoutVersion.replace(/^@/, '');
return `${bareName}.cmd`;

function getNpmCommandFromNpx(npxCommand: string): string {
  const normalized = npxCommand.trim();
  if (/npx\.cmd$/i.test(normalized)) return normalized.replace(/npx\.cmd$/i, 'npm.cmd');
  if (/npx$/i.test(normalized)) return normalized.replace(/npx$/i, 'npm');
  return normalized.replace(/npx/i, 'npm');
}

// Replace the last occurrence of "npx" (most likely the binary name)
const lastIndex = normalized.toLowerCase().lastIndexOf('npx');
if (lastIndex >= 0) {
  return normalized.slice(0, lastIndex) + 'npm' + normalized.slice(lastIndex + 3);
}
return normalized;