class SkillPackCoreModule {
    constructor() {
        this.commands = {};
        this.commandsMeta = {
            'skill-list': { argType: 'dir' }, 'skill-view': { argType: 'file' },
            'skill-create': { argType: 'dir' }, 'skill-patch': { argType: 'file' },
            'skill-delete': { argType: 'file' }, 'skill-export': { argType: 'file' },
            'skill-sync': { argType: 'file' },
        };
        this.terminal = null;
        this._seeded = false;
        this._skills = this._buildSkills();
    }

    requirements() {
        try {
            const fs = this.terminal && this.terminal.fs;
            if (fs && fs.readFile('/skills/_seeded')) {
                return { met: true, missing: [] };
            }
            return { met: false, missing: ['Skills directory not initialized. Will be created on first use.'] };
        } catch (e) {
            return { met: true, missing: [] };
        }
    }

    getHelpInfo() {
        return {
            'skill-pack-core': 'Seed and manage built-in core skills (navigation, memory, search, modules, backup, agents, webdav, security, etc.)',
            'skill-list': 'skill-list [category] — List all skills, optionally filtered by category',
            'skill-view': 'skill-view <name> — View a skill\'s full content',
            'skill-create': 'skill-create <name> <desc> "<steps>" [tags] — Create a new skill',
            'skill-patch': 'skill-patch <name> "<content>" — Replace a skill\'s full content',
            'skill-delete': 'skill-delete <name> — Delete a skill',
            'skill-export': 'skill-export <name> — Export a skill as JSON',
            'skill-import': 'skill-import <json> — Import a skill from JSON string',
            'skill-sync': 'skill-sync — Rebuild skills index from /skills/ directory',
            'skill-webdav-sync': 'skill-webdav-sync — Push all skills to WebDAV as JSON files',
        };
    }
    
    _buildSkills() {
        const s = (name, desc, tags, cat, steps) => ({
            name, description: desc, tags, category: cat,
            content: '---\nname: ' + name + '\ndescription: ' + desc + '\ntags: [' + tags.join(', ') + ']\ncategory: ' + cat + '\n---\n## Steps\n' + steps
        });

        const sk = (name, desc, tags, cat, content) => ({
            name, description: desc, tags, category: cat,
            content: '---\nname: ' + name + '\ndescription: ' + desc + '\ntags: [' + tags.join(', ') + ']\ncategory: ' + cat + '\n---\n' + content
        });

        return [
            s('navigating-the-terminal', 'How to explore the WebX11 terminal, find commands, check status, and navigate the filesystem', ['terminal', 'navigation', 'help', 'filesystem'], 'system',
`1. **Get an overview of available commands:**
   - Type "help" for a full command list sorted by category
   - Type "status" to see filesystem state, loaded modules, Ollama status
   - For a specific command, use help <command>
   - Type "commands" for a compact list with module source info
   - Type "check" for system health including module requirements

2. **Explore the filesystem:**
   - Use ls, ll, tree to browse directories
   - Use cd <dir> to navigate, pwd to show current path
   - Use cat or edit to view file contents
   - Use find or grep to search files
   - Use du to see disk usage

3. **Understand system state:**
   - mem — memory usage (auto-shown in header on boot)
   - status — network, files, modules, Ollama
   - modules — module manager GUI
   - health-check — VFS size, modules, logs, trash, skills, tool failures
   - checkpoint-list — VFS checkpoint snapshots

4. **Agent / Orchestration state:**
   - agent-list — registered agents (type, capabilities, status)
   - orchestrate — list active orchestrated agents
   - lease-list — show active leases with TTL

5. **When user asks a vague question:**
   - First run status and help to understand the current state
   - Then ask clarifying questions based on what you found`),

            s('memory-and-profile', 'How to use the user profile system, session memory, and pattern tracking for persistent context', ['memory', 'profile', 'session', 'persistence'], 'system',
`1. **User Profile (persists across sessions):**
   - user_get(key) — read any profile field (e.g. "preferredModel", "fontSize")
   - user_set(key, value) — write to profile, auto-persists to localStorage
   - user_list — show all stored profile keys
   - user_forget(key) — delete a profile key
   - Dot notation supported: user_set knownFacts.name "Alex"

2. **Session Memory (VFS-based daily logs):**
   - session_save(summary) — save a summary of what was accomplished
   - session_load(date) — read a specific day's log (format: YYYY-MM-DD)
   - session_recent(count) — show last N session summaries
   - session_stats — aggregate totals across all sessions
   - Recent sessions auto-load into context on first message
   - systemd-style journal: use logs and logrotate commands for persistent logging

3. **Conversation Patterns:**
   - Pattern tracking runs automatically — frequent topics surface as hints
   - my-set, my-get, my-list store additional personal data
   - AI conversation context persists within a session (use ai-clear to reset)
   - debug command toggles real-time debug panel with Copy/Export/VFS buttons

4. **Checkpoints (VFS snapshots):**
   - checkpoint [name] — snapshot current VFS state
   - checkpoint-list — list all checkpoints
   - rollback <name> — restore from checkpoint
   - checkpoint-del <name> — delete a checkpoint

5. **When to use:**
   - At start: call session_recent(3) to see what was worked on before
   - After identifying user preferences: call user_set to store them
   - After complex tasks: call session_save with a brief summary
   - Before risky edits: call checkpoint to create a restore point`),

            s('web-search-and-fetch', 'How to search the web and fetch URL content using the WebX11 proxy API', ['search', 'fetch', 'web', 'proxy', 'api'], 'research',
`1. **Search the web:**
   - Use search <query> or web_search(query) — uses /api/search which queries SearXNG + DDG fallback
   - Results include: title, url, content snippet, source engine
   - Always available (same-origin, no CORS issues)
   - 5-minute server-side cache for repeated queries
   - Alternative: use ddg or duck <query> for DuckDuckGo direct, or s <query> as alias

2. **Fetch URL content:**
   - Use fetch <url> or web_fetch(url) — uses /api/extract which strips HTML, extracts clean text
   - Returns: title, content (up to 4000 chars), word_count, extraction method
   - SSRF protection blocks internal network addresses
   - 15-minute server-side cache

3. **Search flags (via terminal search command):**
   - search <query> --summarize — adds AI-generated overview via Ollama
   - search <query> --fetch — fetches content snippets for top 3 results

4. **When to use:**
   - User asks about current events, facts, research → use search <query>
   - User says "read this article" or provides a URL → use fetch <url>
   - For in-depth analysis: search first, then fetch top results`),

            s('module-management', 'How to view, edit, test, reload modules and manage startup configuration', ['modules', 'editing', 'code', 'self-improvement'], 'dev',
`1. **View module source:**
   - view_module(name) — fetches original source or reads from _mods/ if edited
   - Supports all loaded modules: SystemModule, FileSystemModule, SearXNGModule, etc.
   - Or use modules command for GUI module manager

2. **Edit a module:**
   - edit_module(name) — copies source to _mods/<name>.js and opens code editor
   - Editor shows the full source in a textarea
   - Click "Save & Test" to save and auto-load the edited version
   - Checkpoint before editing: checkpoint mod-edit-<name>

3. **Test and reload:**
   - test_module(name) — loads edited module from _mods/ for live testing
   - reload_module(name) — discards edits and reloads from original URL
   - list_modified_modules — shows all modules with pending edits

4. **Check for updates:**
   - check_updates — HEAD-requests all loaded module URLs to verify reachability

5. **Manage startup:**
   - startup-modules — opens the Startup Modules UI to select which modules load
   - load-local <path> — load a module from VFS or URL without editing
   - loadmod <url> — alternative: load module from URL
   - removemod <name> — remove a loaded module

6. **Agent modules (Phase 2):**
   - module-agent-registry.js — Agent registry with agent-list, agent-register, agent-unregister, agent-status
   - module-leases.js — Time-bound contracts with 5s watchdog, auto-expiry
   - module-orchestrator.js — Spawn, delegate, kill, purge with heartbeat monitoring

7. **When to use:**
   - User reports a bug in a module → view_module, edit_module, test_module
   - User asks "can you add X feature?" → same workflow
   - Always save edits before testing. If test fails, the original module stays loaded.`),

            s('system-maintenance', 'How to reset, troubleshoot, and maintain the WebX11 terminal', ['system', 'maintenance', 'reset', 'troubleshoot', 'config'], 'system',
`1. **Factory reset (wipes everything):**
   - factory-reset --confirm — clears all webx11_ localStorage keys, resets VFS, reloads
   - Use only when the system is in an unrecoverable state

2. **Soft VFS reset:**
   - reset-vfs --confirm — clears only the filesystem, preserves settings/profile/modules

3. **Config management:**
   - config-list — show all config keys and values
   - config-set <key> <value> — set a config value
   - config-delete <key> — remove a config key
   - config-export — dump all config as JSON
   - config-reset — restore defaults (use before factory-reset if you want to save data)

4. **Security level:**
   - security-level <0-3> — set security level (0=Permissive, 1=Standard, 2=Paranoid, 3=Audit)
   - security — show current security level, blocked count, and stats
   - cmd-allow <cmd> — whitelist a command from security checks
   - cmd-deny <cmd> — blacklist a command

5. **Health checks (run automatically after complex tasks):**
   - Check module loading status: loaded vs total
   - Check for pending module edits
   - Check memory usage (high if >100MB)
   - Check skill count (0 skills after 2+ tool calls → suggest create_skill)
   - health-check — full audit: VFS size, modules, logs, trash, skills, tool failures

6. **Font size and display:**
   - font-size <8-32> — set terminal font size, persists across sessions
   - setfont — alias for font-size

7. **Checkpoints:**
   - checkpoint [name] — snapshot current VFS state
   - checkpoint-list — list all checkpoints
   - rollback <name> — restore from checkpoint

8. **When to use:**
   - System is slow or modules fail to load → check check_updates, mem
   - User says "reset everything" → factory-reset --confirm
   - User says "clear my files but keep settings" → reset-vfs --confirm
   - User reports security concerns → security-level or cmd-allow/cmd-deny`),

            s('backup-and-restore', 'How to backup, restore, and export WebX11 data', ['backup', 'restore', 'export', 'import', 'persistence'], 'system',
`1. **Backup VFS:**
   - vfs-export — downloads the entire virtual filesystem as a dated JSON file
   - backup — creates a full backup including VFS, modules, config (saves to _backups/)

2. **WebDAV cloud backup:**
   - webdav-backup — push VFS snapshot to WebDAV server (auto-archive)
   - webdav-backup-list — list remote WebDAV backups
   - webdav-restore <file> — restore VFS from remote WebDAV snapshot
   - webdav-push <local> <remote> — push file to WebDAV space
   - webdav-pull <remote> <local> — pull file from WebDAV space
   - webdav-ls [path] — list remote WebDAV directory contents
   - webdav-status — check WebDAV connection and space usage
   - webdav-explorer — GUI file browser for WebDAV
   - webdav-browser — simpler file listing for WebDAV
   - webdav-config — configure WebDAV endpoint and credentials

3. **Export/Import personal data:**
   - my-export — prints all my-set data as formatted JSON
   - my-import <json> — bulk-import personal data from JSON string

4. **Export/Import modules:**
   - export-mods — exports module registry as JSON
   - import-mods <json> — imports modules from JSON backup

5. **Restore:**
   - restore <json> — restores terminal state from a backup JSON
   - Session logs are saved to /memory/ automatically on page unload

6. **When to use:**
   - Before factory-reset: call my-export, vfs-export, export-mods to save data
   - When switching browsers or devices: export all, then import
   - User says "backup my data" or "save my files"
   - For cloud backup: use webdav-backup (requires WebDAV server configured)`),

            s('mindmap-workflow', 'How to create, view, edit, and manage brainstorming mindmaps', ['mindmap', 'brainstorming', 'planning', 'organization'], 'productivity',
`1. **Create a new mindmap:**
   - mindmap new "<topic>" -t tag1,tag2 — creates a root node
   - Tags are optional (e.g. planning, research, dev)
   - Root gets auto-assigned a color from 7-color palette

2. **Add child nodes:**
   - mindmap add <parent-id> "<idea>" -t tag — add a child
   - Get the parent-id from mindmap show
   - IDs are 4-char random strings (e.g. a3f8, x7k2)

3. **View:**
   - mindmap show — full tree with Unicode box-drawing
   - mindmap show <id> — subtree starting at that node

4. **Edit nodes:**
   - mindmap rename <id> "<new text>" — change text
   - mindmap color <id> <color> — set color (red/green/yellow/blue/cyan/magenta/white)
   - mindmap tag <id> <tag> — add a tag

5. **Persistence:**
   - mindmap save <name> — save to localStorage
   - mindmap load <name> — restore
   - mindmap list — show saved mindmaps
   - mindmap delete <name> — remove saved

6. **Export:**
   - mindmap export [id] — Markdown bullet list output, auto-copies to clipboard

7. **When to use:**
   - Map out project structure, brainstorm features, organize ideas
   - Break down complex tasks into subtrees
   - User says "brainstorm", "diagram", "organize thoughts", "plan"`),

            s('skills-system-guide', 'How to use the skills system: load, create, patch, list, and audit skills for persistent procedural memory', ['skills', 'system', 'meta'], 'system',
`1. **Always load skills at task start:**
   - At the START of every task, type or call "skill-view <name>" or "skill-list"
   - Example: skill-view "module-management" — returns matching skill content
   - Example: skill-list system — browse skills by category

2. **Create skills after complex tasks:**
   - After any task with 3+ tool calls, call "skill-create"
   - Required fields: name (kebab-case), description, content (markdown with YAML frontmatter)
   - Optional: tags (comma-separated), category (e.g. research, system, dev)
   - Skills persist in /skills/ as .md files with /skills/index.json for fast lookup
   - Skill pack auto-seeds 8 core skills on first boot

3. **Patch skills when they're outdated:**
   - If a stored procedure has wrong steps, call "skill-patch <name>"
   - This replaces the entire skill content and updates the index
   - Do NOT create a duplicate — always patch the existing skill

4. **Auto-created error skills:**
   - If the same tool fails 3+ times, a workaround skill is created automatically
   - Named tool-<name>-workaround (e.g. tool-write_file-workaround)

5. **Audit and maintenance:**
   - skill-list <category?> — browse available skills, optionally filter
   - skill-export <name> — download a skill as markdown
   - skill-import <json> — bulk import skills
   - skill-sync — re-index skills from /skills/ directory
   - Skills are audited every 20 messages for staleness (empty content, >30 days old)

6. **YAML frontmatter format:**
   - Each skill file must start with: ---\\nname: <name>\\ndescription: <text>\\ntags: [...]\\ncategory: <cat>\\n---\\n
   - Steps follow under ## Steps heading
   - Use numbered lists for sequential steps`),

            sk('agent-orchestration', 'How to use the agent registry, leases, and orchestrator for multi-agent workflows', ['agents', 'orchestration', 'delegation', 'leases'], 'system',
`## Steps
1. **Agent Registry:**
   - agent-list — list all registered agents (ID, type, capabilities, status)
   - agent-register <type> <capabilities> — register a new agent (capabilities: comma-separated like "code,research")
   - agent-unregister <id> — remove an agent
   - agent-status <id> — detailed status including uptime, task history

2. **Leases (time-bound contracts):**
   - lease-create <agent-id> <ttl-seconds> — create a lease with watchdog timer
   - lease-list — show active leases with remaining TTL
   - lease-revoke <lease-id> — terminate a lease early
   - lease-renew <lease-id> <ttl-seconds> — extend a lease

3. **Orchestrator (spawn, delegate, kill):**
   - orchestrator-spawn <type> <capabilities> — spawn a new agent automatically (registers + creates lease)
   - orchestrator-kill <agent-id> — kill an agent (revokes lease + unregisters)
   - orchestrate — list all active agents with their orchestrator state
   - orchestrator-purge — kill all idle/expired agents
   - orchestrator-status — full system status: active, idle, dead agents

4. **AI tool integration:**
   - AI tools list_agents, delegate_task, spawn_agent are available in the AI system prompt
   - The AI can auto-spawn worker agents for sub-tasks
   - Each agent gets its own VFS workspace at /agents/<agent-id>/

5. **When to use:**
   - User needs parallel task execution → orchestrator-spawn coder + researcher
   - Time-bound automation → lease-create with short TTL
   - System cleanup → orchestrator-purge to kill stale agents`),

            sk('debug-panel-and-logs', 'How to use the debug panel, session logging, and terminal diagnostics', ['debug', 'logging', 'diagnostics', 'troubleshooting'], 'system',
`## Steps
1. **Toggle debug panel:**
   - debug — opens real-time debug panel showing last AI tool call, response time, and context
   - Debug panel includes Copy, Export, and Write to VFS buttons
   - Export: saves tool call log as timestamped JSON to downloads
   - Write to VFS: appends debug data to /debug.log (dedup by turn ID)

2. **Session logging:**
   - logs [n] [LEVEL] — view last n log entries (optionally filtered by INFO/WARN/ERROR)
   - logrotate — rotate current.log to dated archive (auto-cleans old logs beyond 10)
   - Logs stored in /logs/ directory: current.log + dated archives
   - Health check runs automatically after complex tasks

3. **Diagnostic commands:**
   - health-check — full audit: VFS size, modules, logs, trash, skills
   - check — quick system health including module requirement status
   - mem — real-time memory usage (also in header)
   - status — network, files, modules, Ollama connectivity

4. **System journals:**
   - debug.log — appended by debug panel VFS button (dedup by turn ID)
   - current.log — system activity log with rotation
   - Auto-save: terminal state auto-saves every 60s

5. **When to use:**
   - AI is behaving unexpectedly → debug to see tool calls
   - User reports errors → logs 50 ERROR to see error entries
   - Memory concerns → mem to check, health-check for full audit`),

            sk('webdav-operations', 'How to use WebDAV cloud storage for backup, file sync, and remote file access', ['webdav', 'cloud', 'backup', 'sync', 'storage'], 'system',
`## Steps
1. **Configuration:**
   - webdav-config — configure WebDAV endpoint URL and credentials
   - Connection auto-tested on config; webdav-status shows connection health
   - Uses per-user token stored in .token file on the server side

2. **File operations:**
   - webdav-ls [path] — list remote directory contents
   - webdav-push <local-path> <remote-path> — upload file to WebDAV
   - webdav-pull <remote-path> [local-path] — download file from WebDAV
   - webdav-explorer — GUI file browser for WebDAV
   - webdav-browser — CLI file browser for WebDAV

3. **Backup & Restore:**
   - webdav-backup — push full VFS snapshot to WebDAV (creates /backups/newos4-<date>.json)
   - webdav-backup-list — list all remote backup snapshots
   - webdav-restore <filename> — restore VFS from a remote backup snapshot

4. **Status & Diagnostics:**
   - webdav-status — connection status, last sync, space information
   - If uploads fail: check webdav-config, ensure .token file is valid
   - WebDAV runs on the same server (nginx with WebDAV module), no external dependency

5. **When to use:**
   - Before factory-reset: webdav-backup to store VFS remotely
   - Cross-browser: webdav-push/pull to move files between instances
   - User says "cloud backup" or "remote save" → webdav-backup`),

            sk('security-and-safety', 'How to use WebX11 security levels, command blocking, and safety features', ['security', 'safety', 'blocking', 'permissions'], 'system',
`## Steps
1. **Security levels:**
   - security-level <0-3> — set security level:
     0 = Permissive (no blocks, no confirms — anything runs)
     1 = Standard (unknown cmds → AI route, destructive → confirm, system → block)
     2 = Paranoid (unknown cmds blocked entirely, destructive blocked)
     3 = Audit (everything allowed, everything logged)
   - Default: level 1
   - security — show current level, blocked count, and stats

2. **Command control:**
   - cmd-allow <cmd> — whitelist a command from security checks
   - cmd-deny <cmd> — blacklist/block a command entirely
   - whitelist built-in: help, clear, ls, cat, pwd, whoami, df, free, top, ps, echo, date, env, history

3. **What gets blocked at each level:**
   - Unknown commands: Level 1 → AI routed, Level 2+ → blocked
   - Destructive commands (delete, write, save, format, etc.): Level 1 → confirmation, Level 2+ → blocked
   - System commands (reboot, shutdown, format, kill): Level 1+ → blocked
   - Suspicious flags (--execute, --eval, --shell): Level 1+ → blocked

4. **Safety checklist:**
   - Check security: security shows your current level
   - Before running risky commands: create a checkpoint first
   - For temporary relax: security-level 0, then restore to 1
   - For total lockdown before leaving: security-level 2

5. **When to use:**
   - User wants to lock down the terminal → security-level 2
   - User wants to allow a blocked command → cmd-allow <cmd>
   - Debugging strange behavior → verify security-level (user may have set it higher)`),

            sk('mindmap-user-guide', 'How to create, view, and manage brainstorming mindmaps using the mindmap terminal module', ['mindmap', 'brainstorming', 'organization', 'planning'], 'productivity',
`## Steps
1. **Create a new mindmap:**
   - mindmap new "<topic>" -t tag1,tag2 — creates a root node
   - Tags are optional (e.g. planning, research, dev)
   - Root gets auto-assigned a color

2. **Add child nodes:**
   - mindmap add <parent-id> "<idea>" -t tag — add a child
   - Get the parent-id from mindmap show
   - IDs are 4-char random strings (e.g. a3f8, x7k2)

3. **View the mindmap:**
   - mindmap show — full tree with Unicode box-drawing
   - mindmap show <id> — subtree starting at that node

4. **Edit nodes:**
   - mindmap rename <id> "<new text>" — change text
   - mindmap color <id> <color> — set color (red/green/yellow/blue/cyan/magenta/white)
   - mindmap tag <id> <tag> — add a tag

5. **Persistence:**
   - mindmap save <name> — save to localStorage
   - mindmap load <name> — restore
   - mindmap list — show saved mindmaps
   - mindmap delete <name> — remove saved

6. **Export:**
   - mindmap export [id] — Markdown bullet list output

## When to use
- User wants to brainstorm, organize ideas, plan features
- User says "map out", "diagram", "brainstorm", "organize thoughts"
- Visualizing project structure or task decomposition`),

            sk('floating-ui', 'How to create, manage, and remove floating UI elements — buttons, collapsible menus, and status panels that persist across page reloads', ['floating', 'ui', 'buttons', 'menu', 'gui'], 'ui',
`## Commands

1. **Create a floating button:**
   - floating-add btn <id> <label> <command>
   - Example: floating-add btn files "📁 Files" ls
   - Button appears at bottom-right, persists across reloads

2. **Create a collapsible menu:**
   - floating-add menu <id> <label> btn:SubLabel|command btn:Sub2|cmd2 ...
   - Example: floating-add menu tools "🔧 Tools" btn:Help|help btn:Clear|clear
   - Click header to expand/collapse. State persists.

3. **Create a text panel:**
   - floating-add panel <id> <title> <content>
   - Example: floating-add panel status "📊 Status" "CPU: 2%"

4. **Manage elements:**
   - floating-list — show all elements with IDs and positions
   - floating-remove <id> — delete by ID
   - floating-toggle <id> — show/hide without deleting
   - floating-pos <id> x|auto y|auto — reposition or reset to auto
   - floating-clear — remove everything

5. **Persistence:**
   - All elements auto-save to localStorage (webx11_floating_elements)
   - Survive page reload, browser restart
   - Run floating-clear to start fresh

## When to use
- User wants quick-access buttons instead of typing commands
- User says "add a button for X", "make a shortcut", "floating menu"
- Creating a dashboard with status panels and action buttons`)
        ];
    }
    registerCommands() {
        this.commands['skill-pack-core'] = () => {
            const count = this._skills.length;
            this.terminal.print(`Skill Pack: Core — ${count} skills available`, 'info');
            this.terminal.print('Skills will auto-seed on load', 'info');
        };
        this.commands['skill-list'] = (args) => this._cmdSkillList(args);
        this.commands['skill-view'] = (args) => this._cmdSkillView(args);
        this.commands['skill-create'] = (args) => this._cmdSkillCreate(args);
        this.commands['skill-patch'] = (args) => this._cmdSkillPatch(args);
        this.commands['skill-delete'] = (args) => this._cmdSkillDelete(args);
        this.commands['skill-export'] = (args) => this._cmdSkillExport(args);
        this.commands['skill-import'] = (args) => this._cmdSkillImport(args);
        this.commands['skill-sync'] = () => this._cmdSkillSync();
        this.commands['skill-webdav-sync'] = () => this._cmdSkillWebdavSync();
    }
    // ── Skill Commands ──

    _cmdSkillList(args) {
        const fs = this.terminal.fs;
        const index = fs.fsReadJSON('/skills/index.json') || {};
        const entries = Object.values(index);
        const filter = args[0] ? args[0].toLowerCase() : null;
        const filtered = filter ? entries.filter(s => s.category === filter || s.category?.toLowerCase() === filter) : entries;
        if (filtered.length === 0) {
            this.terminal.print(filter ? `No skills in category: ${args[0]}` : 'No skills installed.', 'info');
            return;
        }
        this.terminal.print(`📚 Skills (${filtered.length} of ${entries.length} total):`, 'info');
        // Group by category
        const groups = {};
        for (const s of filtered) {
            const cat = s.category || 'uncategorized';
            if (!groups[cat]) groups[cat] = [];
            groups[cat].push(s);
        }
        for (const [cat, skills] of Object.entries(groups)) {
            this.terminal.print(`  ${cat}:`, '');
            for (const s of skills) {
                const tags = s.tags?.length ? ` (${s.tags.join(', ')})` : '';
                this.terminal.print(`    📄 ${s.name} — ${s.description}${tags}`, '');
            }
        }
    }

    _cmdSkillView(args) {
        if (!args[0]) { this.terminal.print('Usage: skill-view <name>', 'warning'); return; }
        const name = args[0].replace(/\.md$/, '');
        const fs = this.terminal.fs;
        const content = fs.readFile(`/skills/${name}.md`);
        if (content === null || content === undefined) {
            this.terminal.print(`Skill not found: ${name}`, 'error');
            return;
        }
        this.terminal.print(`=== ${name} ===`, 'info');
        const lines = content.split('\n');
        for (const line of lines) {
            this.terminal.print(line, '');
        }
        this.terminal.print(`=== End ${name} ===`, 'info');
    }

    _cmdSkillCreate(args) {
        if (args.length < 3) {
            this.terminal.print('Usage: skill-create <name> <description> "<markdown content>" [tags]', 'warning');
            return;
        }
        const name = args[0].replace(/[^a-z0-9-]/g, '').toLowerCase();
        if (!name) { this.terminal.print('Name must be kebab-case (letters, numbers, hyphens only)', 'error'); return; }
        const desc = args[1];
        const content = args.slice(2).join(' ');
        const tags = [];
        if (content.includes('"')) {
            // Parse quoted tags at end
        }
        const fs = this.terminal.fs;
        // Check for duplicate
        const index = fs.fsReadJSON('/skills/index.json') || {};
        if (index[name]) {
            this.terminal.print(`Skill "${name}" already exists. Use skill-patch to update.`, 'warning');
            return;
        }
        const now = new Date().toISOString();
        const skillContent = `---\nname: ${name}\ndescription: ${desc}\ntags: [${tags.join(', ')}]\ncategory: general\n---\n${content}`;
        fs.writeFile(`/skills/${name}.md`, skillContent);
        index[name] = { name, description: desc, tags, category: 'general', created: now, updated: now };
        fs.fsWriteJSON('/skills/index.json', index);
        this.terminal.print(`✅ Skill "${name}" created (${(skillContent.length / 1024).toFixed(1)}KB)`, 'success');
    }

    _cmdSkillPatch(args) {
        if (args.length < 2) {
            this.terminal.print('Usage: skill-patch <name> "<full content>"', 'warning');
            return;
        }
        const name = args[0].replace(/\.md$/, '');
        const content = args.slice(1).join(' ');
        const fs = this.terminal.fs;
        const index = fs.fsReadJSON('/skills/index.json') || {};
        if (!index[name]) {
            this.terminal.print(`Skill not found: ${name}`, 'error');
            return;
        }
        fs.writeFile(`/skills/${name}.md`, content);
        index[name].updated = new Date().toISOString();
        // Re-parse YAML frontmatter to update index
        const headerMatch = content.match(/^---\n([\s\S]*?)\n---\n/);
        if (headerMatch) {
            const header = headerMatch[1];
            const d = header.match(/description:\s*(.+)/);
            const c = header.match(/category:\s*(.+)/);
            const t = header.match(/tags:\s*\[(.*?)\]/);
            if (d) index[name].description = d[1].trim();
            if (c) index[name].category = c[1].trim();
            if (t) index[name].tags = t[1].split(',').map(x => x.trim()).filter(Boolean);
        }
        fs.fsWriteJSON('/skills/index.json', index);
        this.terminal.print(`✅ Skill "${name}" updated`, 'success');
    }

    _cmdSkillDelete(args) {
        if (!args[0]) { this.terminal.print('Usage: skill-delete <name>', 'warning'); return; }
        const name = args[0].replace(/\.md$/, '');
        const fs = this.terminal.fs;
        const index = fs.fsReadJSON('/skills/index.json') || {};
        if (!index[name]) {
            this.terminal.print(`Skill not found: ${name}`, 'error');
            return;
        }
        fs.deleteFile(`/skills/${name}.md`);
        delete index[name];
        fs.fsWriteJSON('/skills/index.json', index);
        this.terminal.print(`🗑️ Skill "${name}" deleted`, 'success');
    }

    _cmdSkillExport(args) {
        if (!args[0]) { this.terminal.print('Usage: skill-export <name>', 'warning'); return; }
        const name = args[0].replace(/\.md$/, '');
        const fs = this.terminal.fs;
        const index = fs.fsReadJSON('/skills/index.json') || {};
        if (!index[name]) {
            this.terminal.print(`Skill not found: ${name}`, 'error');
            return;
        }
        const content = fs.readFile(`/skills/${name}.md`);
        const exportObj = {
            ...index[name],
            content: content || ''
        };
        this.terminal.print(JSON.stringify(exportObj, null, 2), '');
    }

    _cmdSkillImport(args) {
        if (args.length === 0) { this.terminal.print('Usage: skill-import <json_string> or pipe a JSON object', 'warning'); return; }
        const jsonStr = args.join(' ');
        let data;
        try { data = JSON.parse(jsonStr); } catch (e) {
            this.terminal.print('Invalid JSON. Please provide a valid skill object.', 'error');
            return;
        }
        if (!data.name || !data.content) {
            this.terminal.print('JSON must include "name" and "content" fields', 'error');
            return;
        }
        const fs = this.terminal.fs;
        const index = fs.fsReadJSON('/skills/index.json') || {};
        const now = new Date().toISOString();
        const existing = index[data.name];
        fs.writeFile(`/skills/${data.name}.md`, data.content);
        index[data.name] = {
            name: data.name,
            description: data.description || data.name,
            tags: data.tags || [],
            category: data.category || 'general',
            created: existing?.created || now,
            updated: now
        };
        fs.fsWriteJSON('/skills/index.json', index);
        this.terminal.print(`✅ Skill "${data.name}" imported (${existing ? 'updated' : 'created'})`, 'success');
    }

    _cmdSkillSync() {
        const fs = this.terminal.fs;
        const files = fs.ls('/skills') || [];
        const mdFiles = files.filter(f => f.type === 'file' && f.name.endsWith('.md') && f.name !== 'index.json');
        let synced = 0;
        const index = {};
        for (const f of mdFiles) {
            const content = fs.readFile(`/skills/${f.name}`);
            if (!content) continue;
            const name = f.name.replace(/\.md$/, '');
            const headerMatch = content.match(/^---\n([\s\S]*?)\n---\n/);
            let description = name;
            let tags = [];
            let category = 'general';
            if (headerMatch) {
                const h = headerMatch[1];
                const d = h.match(/description:\s*(.+)/);
                const c = h.match(/category:\s*(.+)/);
                const t = h.match(/tags:\s*\[(.*?)\]/);
                if (d) description = d[1].trim();
                if (c) category = c[1].trim();
                if (t) tags = t[1].split(',').map(x => x.trim()).filter(Boolean);
            }
            index[name] = {
                name,
                description,
                tags,
                category,
                created: new Date().toISOString(),
                updated: new Date().toISOString()
            };
            synced++;
        }
        fs.fsWriteJSON('/skills/index.json', index);
        this.terminal.print(`📚 Skill index rebuilt: ${synced} skills synced`, 'success');
    }

    async _cmdSkillWebdavSync() {
        const fs = this.terminal.fs;
        const index = fs.fsReadJSON('/skills/index.json') || {};
        const names = Object.keys(index);
        if (names.length === 0) {
            this.terminal.print('No skills to sync', 'info');
            return;
        }
        // Find the webdav module
        const webdavMod = this.terminal.moduleManager.modules['WebDAVModule'];
        if (!webdavMod || !webdavMod._webdavRequest) {
            this.terminal.print('WebDAV module not loaded. Configure webdav first with webdav-config', 'warning');
            return;
        }
        this.terminal.print(`📤 Syncing ${names.length} skills to WebDAV...`, 'info');
        let ok = 0, fail = 0;
        await webdavMod._ensureDir('skills');
        for (const name of names) {
            const content = fs.readFile(`/skills/${name}.md`);
            if (content === null) { fail++; continue; }
            const meta = index[name];
            const exportObj = { ...meta, content };
            const json = JSON.stringify(exportObj, null, 2);
            try {
                const resp = await webdavMod._webdavRequest('PUT', 'skills/' + name + '.json', {
                    body: json,
                    headers: { 'Content-Type': 'application/json' }
                });
                if (resp.ok || resp.status === 201 || resp.status === 204) {
                    ok++;
                } else {
                    fail++;
                }
            } catch (e) {
                fail++;
            }
        }
        this.terminal.print(`📤 Skill WebDAV sync complete: ${ok} pushed, ${fail} failed`, fail > 0 ? 'warning' : 'success');
    }

    init() {
        this.seed();
    }
    async seed() {
        console.log('[SkillPackCore] seed() called, _seeded=' + this._seeded);
        if (this._seeded) return;
        const fs = this.terminal.fs;
        if (!fs) { console.warn('[SkillPackCore] this.terminal.fs not available'); return; }
        fs.mkdirRecursive('/skills');
        let index = fs.fsReadJSON('/skills/index.json') || {};
        console.log('[SkillPackCore] existing index keys:', Object.keys(index));
        let seeded = 0;
        for (const skill of this._skills) {
            const existing = index[skill.name];
            if (!existing) {
                fs.writeFile('/skills/' + skill.name + '.md', skill.content);
                index[skill.name] = {
                    name: skill.name,
                    description: skill.description,
                    tags: skill.tags,
                    category: skill.category,
                    created: new Date().toISOString(),
                    updated: new Date().toISOString()
                };
                seeded++;
            } else {
                // Update existing skill content on fresh load (cache-bust version bump triggers this)
                fs.writeFile('/skills/' + skill.name + '.md', skill.content);
                index[skill.name] = {
                    ...existing,
                    description: skill.description,
                    tags: skill.tags,
                    category: skill.category,
                    updated: new Date().toISOString()
                };
            }
        }
        if (seeded > 0) {
            this.terminal.print('📚 Seeded ' + seeded + ' new skill(s)', 'success');
        }
        fs.fsWriteJSON('/skills/index.json', index);
        this._seeded = true;
    }
}
if (typeof window.webx11 !== 'undefined' && window.webx11) {
    webx11.moduleManager.registerModule(new SkillPackCoreModule(), 'https://webx11.duckdns.org/spaces/newos4/modules/ext/skill-pack-core.js');
}