Vibe Coding Documentation MCP (MUSE)

/** * Structured logging utility for MCP server */ class Logger { minLevel = 'info'; static levelPriority = { debug: 0, info: 1, warn: 2, error: 3 }; setLevel(level) { this.minLevel = level; } shouldLog(level) { return Logger.levelPriority[level] >= Logger.levelPriority[this.minLevel]; } formatEntry(entry) { return JSON.stringify(entry); } log(level, message, context, error) { if (!this.shouldLog(level)) return; const entry = { timestamp: new Date().toISOString(), level, message, context }; if (error) { entry.error = { name: error.name, message: error.message, stack: error.stack }; } const formatted = this.formatEntry(entry); switch (level) { case 'error': console.error(formatted); break; case 'warn': console.warn(formatted); break; default: console.log(formatted); } } debug(message, context) { this.log('debug', message, context); } info(message, context) { this.log('info', message, context); } warn(message, context) { this.log('warn', message, context); } error(message, error, context) { this.log('error', message, context, error); } /** * Creates a child logger with preset context */ child(defaultContext) { return new ChildLogger(this, defaultContext); } /** * Measures and logs execution time */ async time(label, fn, context) { const start = Date.now(); try { const result = await fn(); const duration = Date.now() - start; this.info(`${label} completed`, { ...context, duration }); return result; } catch (error) { const duration = Date.now() - start; this.error(`${label} failed`, error, { ...context, duration }); throw error; } } } class ChildLogger { parent; defaultContext; constructor(parent, defaultContext) { this.parent = parent; this.defaultContext = defaultContext; } mergeContext(context) { return { ...this.defaultContext, ...context }; } debug(message, context) { this.parent.debug(message, this.mergeContext(context)); } info(message, context) { this.parent.info(message, this.mergeContext(context)); } warn(message, context) { this.parent.warn(message, this.mergeContext(context)); } error(message, error, context) { this.parent.error(message, error, this.mergeContext(context)); } } // Singleton instance export const logger = new Logger(); // Convenience function to create tool-specific logger export function createToolLogger(toolName) { return logger.child({ tool: toolName }); } //# sourceMappingURL=logger.js.map