superpowers/lib/skills-core.js

const fs = require('fs');

/**
 * 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: '' };
    }
}

module.exports = {
    extractFrontmatter
};