// Extracted from newOS4 index.html — SystemModule
        class SystemModule {
            constructor() {
                this.commands = {};
                this.terminal = null;
            }
            getHelpInfo() {
                return {
                    'help': 'help [command] — Show all commands or usage for a specific command',
                    'echo': 'echo <text...> — Print text to the terminal',
                    'mem': 'mem — Show current memory usage',
                    'status': 'status — Display system status (network, files, modules, Ollama)',
                    'preview': 'preview <file.html> — Render an HTML file from the VFS in a preview pane',
                    'factory-reset': 'factory-reset [--confirm] — Wipe all webx11_ data (VFS, config, AI profile, mindmaps, themes, all localStorage)',
                    'reset-vfs': 'reset-vfs [--confirm] — Clear only the virtual filesystem (keeps settings, modules, AI profile)',
                    'logs': 'logs [n] [LEVEL] — Show last n log entries (optionally filtered by level: INFO/WARN/ERROR)',
                    'logrotate': 'logrotate — Rotate current.log to a dated archive (auto-cleans old)',
                    'health-check': 'health-check — Audit VFS size, modules, logs, trash, skills, tool failures',
                    'memory-map-export': 'memory-map-export — Generate memory map markdown from memory/index.json',
                    'font-size': 'font-size <8-32> — Set terminal font size (persists across sessions)',
                    'setfont': 'setfont <8-32> — Alias for font-size',
                    'smart-prompt': 'smart-prompt [on|off] — Toggle context-aware prompt (shows name, skills, sessions, memory, edits)',
                    'checkpoint': 'checkpoint [name] — Create a VFS snapshot (name defaults to ISO timestamp)',
                    'checkpoint-list': 'checkpoint-list — List all VFS checkpoints',
                    'rollback': 'rollback <name> — Restore VFS from a checkpoint',
                    'checkpoint-del': 'checkpoint-del <name> — Delete a VFS checkpoint',
                    'commands': 'commands — List all commands with module source and requirements status',
                    'check': 'check — Show overall system health including module requirements',
                };
            }
            registerCommands() {
                this.commands['help'] = (args) => this.handleHelp(args);
                this.commands['echo'] = (args) => this.terminal.print(args.join(' '));
                this.commands['mem'] = () => {
                    const mem = performance.memory ? (performance.memory.usedJSHeapSize / 1048576).toFixed(2) : 'N/A';
                    this.terminal.print(`Memory Usage: ${mem} MB`, 'info');
                    document.getElementById('header-status').innerText = `Mem: ${mem}MB`;
                };
                // Refresh memory display on boot
                setTimeout(() => {
                    if (performance.memory) {
                        const mem = (performance.memory.usedJSHeapSize / 1048576).toFixed(1);
                        document.getElementById('header-status').innerText = `Mem: ${mem}MB`;
                    }
                }, 500);
                this.commands['status'] = () => {
                    this.terminal.print(`System: WebX11 ${window.NEWOS4_VERSION || 'v4.0'}`);
                    this.terminal.print(`Network: ${navigator.onLine ? 'Online' : 'Offline'}`);
                    this.terminal.print(`Files: ${this.terminal.fs.ls().length} items`);
                    this.terminal.print(`Modules: ${Object.keys(this.terminal.moduleManager.modules).length} loaded`);
                    this.terminal.print(`Ollama: ${this.terminal.ollamaManager.connected ? 'Connected' : 'Disconnected'}`);
                };
                this.commands['preview'] = (args) => this.terminal.openPreview(args);
                this.commands['factory-reset'] = (args) => {
                    if (!args[0] || args[0] !== '--confirm') {
                        this.terminal.print('⚠️  FACTORY RESET will clear all data:', 'error');
                        this.terminal.print('  • Filesystem (all files + directories)', 'warning');
                        this.terminal.print('  • AI memory, patterns, user profile', 'warning');
                        this.terminal.print('  • Ollama endpoint, model selection', 'warning');
                        this.terminal.print('  • Terminal history, font size', 'warning');
                        this.terminal.print('  • All config, modules, packages', 'warning');
                        this.terminal.print('  • Mindmaps, notes, bookmarks', 'warning');
                        this.terminal.print('  • Themes, context profiles, servers', 'warning');
                        this.terminal.print('  • Chat settings, my data', 'warning');
                        this.terminal.print('Type: factory-reset --confirm to proceed', 'error');
                        return;
                    }
                    for (let i = localStorage.length - 1; i >= 0; i--) {
                        const key = localStorage.key(i);
                        if (key && key.startsWith('webx11_')) localStorage.removeItem(key);
                    }
                    this.terminal.fs.root = { type: 'dir', content: {} };
                    this.terminal.fs.currentPath = [];
                    this.terminal.outputContainer.innerHTML = '';
                    this.terminal.print('✅ Factory reset complete. Reloading...', 'success');
                    setTimeout(() => location.reload(), 1000);
                };
                this.commands['reset-vfs'] = (args) => {
                    if (!args[0] || args[0] !== '--confirm') {
                        this.terminal.print('⚠️  RESET VFS will clear all files and directories:', 'warning');
                        this.terminal.print('  • Virtual filesystem (all files + directories)', 'warning');
                        this.terminal.print('  • VFS will be reset to empty root', 'warning');
                        this.terminal.print('  • All settings, modules, AI profile preserved', 'info');
                        this.terminal.print('Type: reset-vfs --confirm to proceed', 'error');
                        return;
                    }
                    this.terminal.fs.root = { type: 'dir', content: {} };
                    this.terminal.fs.currentPath = [];
                    this.terminal.fs.saveToStorage();
                    this.terminal.print('✅ VFS reset complete. Reloading...', 'success');
                    setTimeout(() => location.reload(), 1000);
                };
                this.commands['logs'] = (args) => {
                    const n = parseInt(args[0]) || 20;
                    const level = args[1] ? args[1].toUpperCase() : null;
                    const content = this.terminal.fs.readFile('/logs/current.log');
                    if (!content) { this.terminal.print('No logs yet', 'info'); return; }
                    let lines = content.split('\n').filter(l => l);
                    if (level) lines = lines.filter(l => l.includes('[' + level + ']'));
                    const tail = lines.slice(-n);
                    if (tail.length === 0) { this.terminal.print('No matching log entries', 'info'); return; }
                    this.terminal.print('--- Logs (last ' + tail.length + ') ---', 'info');
                    tail.forEach(l => this.terminal.print(l, l.includes('[ERROR]') ? 'error' : 'info'));
                };
                // Auto-rotate logs on startup (silently)
                this._autoRotateLogs();
                this.commands['logrotate'] = () => {
                    const rotated = this._autoRotateLogs(true);
                    if (rotated) {
                        this.terminal.print('Log rotated: ' + rotated, 'success');
                    } else {
                        this.terminal.print('Log rotation not needed (<50KB, <500 lines)', 'info');
                    }
                };
                this.commands['health-check'] = () => this._healthCheck();
                this.commands['memory-map-export'] = () => this._memoryMapExport();
                this.commands['font-size'] = (args) => {
                    if (!args.length || !args[0]) {
                        const cur = localStorage.getItem('webx11_font_size');
                        this.terminal.print(`Current font-size: ${cur || '16'}px`, 'info');
                        this.terminal.print('Usage: font-size <8-32>', 'info');
                        return;
                    }
                    const val = parseInt(args[0], 10);
                    if (isNaN(val) || val < 8 || val > 32) {
                        this.terminal.print('font-size must be between 8 and 32', 'error');
                        return;
                    }
                    localStorage.setItem('webx11_font_size', val.toString());
                    // Apply directly to body — bypasses CSS inheritance issues
                    document.body.style.fontSize = val + 'px';
                    document.getElementById('terminal-container').style.fontSize = val + 'px';
                    document.getElementById('command-input').style.fontSize = val + 'px';
                    this.terminal.print(`Font size set to ${val}px (saved) 👆`, 'success');
                };
                this.commands['setfont'] = this.commands['font-size'];

                // Checkpoint commands (delegated to virtual-fs.js)
                this.commands['checkpoint'] = (args) => {
                    try {
                        const name = args[0] || '';
                        this.terminal.fs.checkpoint(name);
                        const displayName = name || new Date().toISOString();
                        this.terminal.print('✅ Checkpoint created: ' + displayName, 'success');
                    } catch (e) {
                        this.terminal.print('Checkpoint failed: ' + e.message, 'error');
                    }
                };
                this.commands['checkpoint-list'] = () => {
                    try {
                        const list = this.terminal.fs.listCheckpoints();
                        if (!list || list.length === 0) {
                            this.terminal.print('No checkpoints found', 'info');
                            return;
                        }
                        this.terminal.print('📋 Checkpoints:', 'text-muted');
                        list.forEach(c => this.terminal.print('  • ' + c));
                    } catch (e) {
                        this.terminal.print('checkpoint-list failed: ' + e.message, 'error');
                    }
                };
                this.commands['checkpoint-del'] = (args) => {
                    if (!args[0]) return this.terminal.print('Usage: checkpoint-del <name>', 'warning');
                    try {
                        if (this.terminal.fs.deleteCheckpoint(args[0])) {
                            this.terminal.print('Deleted checkpoint: ' + args[0], 'success');
                        } else {
                            this.terminal.print('Checkpoint not found: ' + args[0], 'error');
                        }
                    } catch (e) {
                        this.terminal.print('checkpoint-del failed: ' + e.message, 'error');
                    }
                };
                this.commands['rollback'] = (args) => {
                    if (!args[0]) return this.terminal.print('Usage: rollback <name>', 'warning');
                    try {
                        if (this.terminal.fs.rollback(args[0])) {
                            this.terminal.print('↻ Rolled back to checkpoint: ' + args[0], 'success');
                        } else {
                            this.terminal.print('Rollback failed: checkpoint not found or invalid', 'error');
                        }
                    } catch (e) {
                        this.terminal.print('Rollback failed: ' + e.message, 'error');
                    }
                };
            }
            _autoRotateLogs(force = false) {
                try {
                    const content = this.terminal.fs.readFile('/logs/current.log') || '';
                    const lines = content.split('\n').filter(l => l);
                    const size = content.length;
                    if (!force && size < 51200 && lines.length < 500) return null;
                    const now = new Date();
                    const stamp = now.getFullYear() + '-' +
                        String(now.getMonth()+1).padStart(2,'0') + '-' +
                        String(now.getDate()).padStart(2,'0') + '_' +
                        String(now.getHours()).padStart(2,'0') + '00';
                    this.terminal.fs.writeFile('/logs/' + stamp + '.log', content);
                    this.terminal.fs.writeFile('/logs/current.log', '');
                    // Clean oldest rotated logs (>10)
                    const logsDir = this.terminal.fs.readDir('/logs');
                    if (logsDir && logsDir.content) {
                        const rotated = Object.keys(logsDir.content)
                            .filter(k => k.endsWith('.log') && k !== 'current.log')
                            .sort();
                        while (rotated.length > 10) {
                            const oldest = rotated.shift();
                            this.terminal.fs.deleteFile('/logs/' + oldest);
                        }
                    }
                    return stamp + '.log';
                } catch (e) { return null; }
            }
            _healthCheck() {
                const fs = this.terminal.fs;
                let warnings = 0;
                this.terminal.print('╔══════════════════════════════════════╗', 'info');
                this.terminal.print('║      🔍 SYSTEM HEALTH CHECK          ║', 'info');
                this.terminal.print('╚══════════════════════════════════════╝', 'info');
                // VFS size
                const dump = JSON.stringify(fs.root).length;
                const vfsOk = dump < 524288;
                this.terminal.print(`VFS size: ${(dump/1024).toFixed(1)}KB ${vfsOk ? '✅' : '⚠️ > 512KB'}`, vfsOk ? 'info' : 'warning');
                if (!vfsOk) warnings++;
                // Modules
                const modTotal = Object.keys(this.terminal.moduleManager.modules || {}).length;
                this.terminal.print(`Modules loaded: ${modTotal} ✅`, 'info');
                // Logs
                const logContent = fs.readFile('/logs/current.log') || '';
                const logLines = logContent.split('\n').filter(l => l).length;
                this.terminal.print(`Current log: ${logLines} lines`, logLines > 500 ? 'warning' : 'info');
                if (logLines > 500) warnings++;
                // Trash
                const trashList = fs.listTrash ? fs.listTrash() : [];
                this.terminal.print(`Trash items: ${trashList.length}`, 'info');
                // Skills
                const skillIdx = fs.fsReadJSON ? (fs.fsReadJSON('/skills/index.json') || {}) : {};
                const skillCount = Object.keys(skillIdx).length;
                this.terminal.print(`Skills: ${skillCount}`, skillCount > 0 ? 'info' : 'warning');
                if (skillCount === 0) warnings++;
                // Summary
                this.terminal.print('─'.repeat(40), 'text-muted');
                if (warnings === 0) {
                    this.terminal.print('All checks passed ✅', 'success');
                } else {
                    this.terminal.print(`${warnings} warning(s) found`, 'warning');
                }
            }
            _memoryMapExport() {
                const fs = this.terminal.fs;
                const idx = fs.fsReadJSON ? (fs.fsReadJSON('/memory/index.json') || {}) : null;
                if (!idx) {
                    this.terminal.print('No memory index found at /memory/index.json', 'error');
                    return;
                }
                this.terminal.print('---\nname: adaptive-memory-map\ndescription: Auto-generated from memory/index.json\ntags: [memory, context, tracking, adaptation]\ncategory: system\n---\n', 'info');
                for (const [k,v] of Object.entries(idx)) {
                    this.terminal.print(`## ${k}\n- Tasks: ${v.tasks || 0}\n- Updated: ${v.updated || 'unknown'}\n- Summary: ${(v.summary || '').substring(0,100)}...`, 'info');
                }
                this.terminal.print('(Not saved — render to file with memory-map-export > /memory/reference.md if desired)', 'text-muted');
            }
            handleHelp(args) {
                const helpMap = this.terminal.moduleManager.getAllHelp();
                // Single command lookup
                if (args && args.length > 0) {
                    const cmd = args[0].toLowerCase();
                    const allCommands = this.terminal.moduleManager.getAllCommands();
                    if (allCommands[cmd]) {
                        const helpEntry = helpMap[cmd];
                        if (helpEntry) {
                            this.terminal.print(helpEntry, 'info');
                        } else {
                            this.terminal.print(`No help available for ${cmd}`, 'warning');
                        }
                    } else {
                        this.terminal.print(`No help available for ${cmd}`, 'warning');
                    }
                    return;
                }
                // Dynamically group commands by owning module
                const cmdToModule = this.terminal.moduleManager.getAllCommands();
                const moduleGroups = {};
                for (const [cmd, modName] of Object.entries(cmdToModule)) {
                    if (!moduleGroups[modName]) moduleGroups[modName] = [];
                    moduleGroups[modName].push(cmd);
                }
                const modLabels = {
                    FileSystemModule: '📁 Filesystem',
                    WebX11AIAssistantModule: '🤖 AI',
                    WebXAIAliasModule: '🌐 WebX',
                    DuckDuckGoModule: '🔍 Search & Web',
                    SearXNGModule: '🔍 Search & Web',
                    WebFetcherModule: '🔍 Search & Web',
                    AliasModule: '🔧 Tools',
                    BusyBoxModule: '🔧 Tools',
                    CalcModule: '🔧 Tools',
                    CronModule: '🔧 Tools',
                    CryptoGzipModule: '🔧 Tools',
                    DiffModule: '🔧 Tools',
                    EditorModule: '🔧 Tools',
                    FileManagerModule: '🔧 Tools',
                    FinderModule: '🔧 Tools',
                    MindmapModule: '🔧 Tools',
                    ThemeModule: '🔧 Tools',
                    TutorialModule: '🔧 Tools',
                    VoiceModule: '🔧 Tools',
                    WpmModule: '🔧 Tools',
                    SystemModule: '⚙️ System',
                    ShellModule: '⚙️ System',
                    ServerMonitorModule: '📡 Network',
                    ModuleManagerModule: '🧩 Modules',
                    OllamaModule: '🦙 Ollama',
                    NeuralVFSModule: '🧠 Neural VFS',
                    SkillPackCoreModule: '📚 Skills',
                    ConfigManagerModule: '⚙️ Config',
                    ModuleIOModule: '🔌 I/O',
                    SandboxModule: '🏖️ Sandbox',
                    MyModule: '💾 Data',
                    WebDAVModule: '🧰 Extras',
                    ChatStudioModule: '🧰 Extras',
                    SimpleGUIModule: '🖥️ GUI',
                    SecretVault: '🔒 Vault',
                    OrchestratorModule: '🧠 Orchestrator',
                    PredictorModule: '🔮 Prediction',
                    SmartContextModule: '🧠 Context',
                    MemoryGraphModule: '📊 Memory',
                    DynamicPromptsModule: '💬 Prompts',
                    WorldModelModule: '🌍 World',
                    LeaseModule: '🔐 Leases',
                    AgentRegistryModule: '🤖 Agents',
                };
                // Merge modules with the same label
                const grouped = {};
                const usedLabels = new Set();
                for (const [modName, cmds] of Object.entries(moduleGroups)) {
                    const label = modLabels[modName] || `🧩 ${modName.replace(/Module$/, '')}`;
                    if (!grouped[label]) grouped[label] = [];
                    grouped[label].push(...cmds);
                    usedLabels.add(label);
                }
                let result = '╔══════════════════════════════════════╗\n║   🔷 WebX11 ' + (window.NEWOS4_VERSION || 'v4.0') + ' — All Commands  ║\n╚══════════════════════════════════════╝\n\n';
                const total = Object.keys(helpMap).length;
                result += `📊 ${total} commands loaded\n\n`;
                for (const [label, cmds] of Object.entries(grouped)) {
                    result += label + '\n';
                    cmds.forEach(c => {
                        const desc = (helpMap[c] || c).split(' — ')[1] || '';
                        const short = desc.substring(0, 55);
                        result += `   ${c.padEnd(16)}${short}\n`;
                    });
                    result += '\n';
                }
                result += '━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n  help <command>  →  detailed usage\n━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━';
                this.terminal.print(result.trim(), 'info');
            }
        }