Reorganize: Move all skills to skills/ folder

- Created skills/ directory
- Moved 272 skills to skills/ subfolder
- Kept agents/ at root level
- Kept installation scripts and docs at root level

Repository structure:
- skills/           - All 272 skills from skills.sh
- agents/           - Agent definitions
- *.sh, *.ps1       - Installation scripts
- README.md, etc.   - Documentation

Co-Authored-By: Claude <noreply@anthropic.com>

skills/plugins/marketplaces/superpowers-marketplace/plugins/superpowers/lib/skills-core.js

@@ -0,0 +1,208 @@
+import fs from 'fs';
+import path from 'path';
+import { execSync } from 'child_process';
+
+/**
+ * Extract YAML frontmatter from a skill file.
+ * Current format:
+ * ---
+ * name: skill-name
+ * description: Use when [condition] - [what it does]
+ * ---
+ *
+ * @param {string} filePath - Path to SKILL.md file
+ * @returns {{name: string, description: string}}
+ */
+function extractFrontmatter(filePath) {
+    try {
+        const content = fs.readFileSync(filePath, 'utf8');
+        const lines = content.split('\n');
+
+        let inFrontmatter = false;
+        let name = '';
+        let description = '';
+
+        for (const line of lines) {
+            if (line.trim() === '---') {
+                if (inFrontmatter) break;
+                inFrontmatter = true;
+                continue;
+            }
+
+            if (inFrontmatter) {
+                const match = line.match(/^(\w+):\s*(.*)$/);
+                if (match) {
+                    const [, key, value] = match;
+                    switch (key) {
+                        case 'name':
+                            name = value.trim();
+                            break;
+                        case 'description':
+                            description = value.trim();
+                            break;
+                    }
+                }
+            }
+        }
+
+        return { name, description };
+    } catch (error) {
+        return { name: '', description: '' };
+    }
+}
+
+/**
+ * Find all SKILL.md files in a directory recursively.
+ *
+ * @param {string} dir - Directory to search
+ * @param {string} sourceType - 'personal' or 'superpowers' for namespacing
+ * @param {number} maxDepth - Maximum recursion depth (default: 3)
+ * @returns {Array<{path: string, name: string, description: string, sourceType: string}>}
+ */
+function findSkillsInDir(dir, sourceType, maxDepth = 3) {
+    const skills = [];
+
+    if (!fs.existsSync(dir)) return skills;
+
+    function recurse(currentDir, depth) {
+        if (depth > maxDepth) return;
+
+        const entries = fs.readdirSync(currentDir, { withFileTypes: true });
+
+        for (const entry of entries) {
+            const fullPath = path.join(currentDir, entry.name);
+
+            if (entry.isDirectory()) {
+                // Check for SKILL.md in this directory
+                const skillFile = path.join(fullPath, 'SKILL.md');
+                if (fs.existsSync(skillFile)) {
+                    const { name, description } = extractFrontmatter(skillFile);
+                    skills.push({
+                        path: fullPath,
+                        skillFile: skillFile,
+                        name: name || entry.name,
+                        description: description || '',
+                        sourceType: sourceType
+                    });
+                }
+
+                // Recurse into subdirectories
+                recurse(fullPath, depth + 1);
+            }
+        }
+    }
+
+    recurse(dir, 0);
+    return skills;
+}
+
+/**
+ * Resolve a skill name to its file path, handling shadowing
+ * (personal skills override superpowers skills).
+ *
+ * @param {string} skillName - Name like "superpowers:brainstorming" or "my-skill"
+ * @param {string} superpowersDir - Path to superpowers skills directory
+ * @param {string} personalDir - Path to personal skills directory
+ * @returns {{skillFile: string, sourceType: string, skillPath: string} | null}
+ */
+function resolveSkillPath(skillName, superpowersDir, personalDir) {
+    // Strip superpowers: prefix if present
+    const forceSuperpowers = skillName.startsWith('superpowers:');
+    const actualSkillName = forceSuperpowers ? skillName.replace(/^superpowers:/, '') : skillName;
+
+    // Try personal skills first (unless explicitly superpowers:)
+    if (!forceSuperpowers && personalDir) {
+        const personalPath = path.join(personalDir, actualSkillName);
+        const personalSkillFile = path.join(personalPath, 'SKILL.md');
+        if (fs.existsSync(personalSkillFile)) {
+            return {
+                skillFile: personalSkillFile,
+                sourceType: 'personal',
+                skillPath: actualSkillName
+            };
+        }
+    }
+
+    // Try superpowers skills
+    if (superpowersDir) {
+        const superpowersPath = path.join(superpowersDir, actualSkillName);
+        const superpowersSkillFile = path.join(superpowersPath, 'SKILL.md');
+        if (fs.existsSync(superpowersSkillFile)) {
+            return {
+                skillFile: superpowersSkillFile,
+                sourceType: 'superpowers',
+                skillPath: actualSkillName
+            };
+        }
+    }
+
+    return null;
+}
+
+/**
+ * Check if a git repository has updates available.
+ *
+ * @param {string} repoDir - Path to git repository
+ * @returns {boolean} - True if updates are available
+ */
+function checkForUpdates(repoDir) {
+    try {
+        // Quick check with 3 second timeout to avoid delays if network is down
+        const output = execSync('git fetch origin && git status --porcelain=v1 --branch', {
+            cwd: repoDir,
+            timeout: 3000,
+            encoding: 'utf8',
+            stdio: 'pipe'
+        });
+
+        // Parse git status output to see if we're behind
+        const statusLines = output.split('\n');
+        for (const line of statusLines) {
+            if (line.startsWith('## ') && line.includes('[behind ')) {
+                return true; // We're behind remote
+            }
+        }
+        return false; // Up to date
+    } catch (error) {
+        // Network down, git error, timeout, etc. - don't block bootstrap
+        return false;
+    }
+}
+
+/**
+ * Strip YAML frontmatter from skill content, returning just the content.
+ *
+ * @param {string} content - Full content including frontmatter
+ * @returns {string} - Content without frontmatter
+ */
+function stripFrontmatter(content) {
+    const lines = content.split('\n');
+    let inFrontmatter = false;
+    let frontmatterEnded = false;
+    const contentLines = [];
+
+    for (const line of lines) {
+        if (line.trim() === '---') {
+            if (inFrontmatter) {
+                frontmatterEnded = true;
+                continue;
+            }
+            inFrontmatter = true;
+            continue;
+        }
+
+        if (frontmatterEnded || !inFrontmatter) {
+            contentLines.push(line);
+        }
+    }
+
+    return contentLines.join('\n').trim();
+}
+
+export {
+    extractFrontmatter,
+    findSkillsInDir,
+    resolveSkillPath,
+    checkForUpdates,
+    stripFrontmatter
+};