class SkillPackCoreModule {
    constructor() {
        this.commands = {};
        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, mindmap, etc.)',
        };
    }
    
    _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}`
        });

        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:**
   - Call get_help() to get a full command list sorted by category
   - Call get_status() to see filesystem state, loaded modules, Ollama status
   - For a specific command, use help <command> or check the help map

2. **Explore the filesystem:**
   - Use list_files(path?) to browse directories (omit path for current dir)
   - Use read_file(path) to view file contents
   - Use get_current_dir to see your working directory
   - Use run_command("ls") or run_command("tree") for visual output

3. **Understand system state:**
   - run_command("mem") — memory usage
   - run_command("status") — network, files, modules, Ollama
   - run_command("modules") — module manager GUI
   - get_module_status() — loaded modules, URLs, local edits

4. **When user asks a vague question:**
   - First call get_status() and get_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

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)

4. **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`),

            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:**
   - Call 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

2. **Fetch URL content:**
   - Call 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 → call web_search
   - User says "read this article" or provides a URL → call web_fetch
   - 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.

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

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

6. **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. **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)

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

6. **When to use:**
   - System is slow or modules fail to load → check check_updates, memory
   - User says "reset everything" → factory-reset --confirm
   - User says "clear my files but keep settings" → reset-vfs --confirm`),

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

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

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

5. **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"`),

            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, call load_skills(query) to check for stored procedures
   - Example: load_skills("search the web") returns matching skill content
   - Example: load_skills("edit module") returns the module editing workflow

2. **Create skills after complex tasks:**
   - After any task with 3+ tool calls, call create_skill to save the approach
   - 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

3. **Patch skills when they're outdated:**
   - If a stored procedure has wrong steps, call patch_skill(name, newContent)
   - 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:**
   - list_skills(category?) — browse available skills, optionally filter
   - 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`),
        ];
    }
    registerCommands() {
        this.commands['skill-pack-core'] = () => {
            const count = this._skills.length;
            this.terminal.print(`Skill Pack: Core — ${count} skills available`, 'info');
            this.terminal.print('Skills will auto-seed on load', 'info');
        };
    }
    init() {
        this.seed();
    }
    async seed() {
        console.log('[SkillPackCore] seed() called, _seeded=' + this._seeded);
        if (this._seeded) return;
        const fs = this.terminal.fs;
        if (!fs) { console.warn('[SkillPackCore] this.terminal.fs not available'); return; }
        fs.mkdirRecursive('/skills');
        let index = fs.fsReadJSON('/skills/index.json') || {};
        console.log('[SkillPackCore] existing index keys:', Object.keys(index));
        let seeded = 0;
        for (const skill of this._skills) {
            if (!index[skill.name]) {
                fs.writeFile(`/skills/${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++;
            }
        }
        if (seeded > 0) {
            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');
}