Deep Code Reasoning MCP Server

/** * Logger utility for MCP server * * MCP servers using stdio transport MUST log to stderr (not stdout) * because stdout is reserved for MCP protocol communication. * This logger provides semantic methods while ensuring correct output stream. */ export class Logger { private prefix: string; constructor(prefix: string = '[MCP]') { this.prefix = prefix; } /** * Log informational messages to stderr */ info(...args: any[]): void { console.error(this.prefix, ...args); } /** * Log warning messages to stderr */ warn(...args: any[]): void { console.error(`${this.prefix} [WARN]`, ...args); } /** * Log error messages to stderr */ error(...args: any[]): void { console.error(`${this.prefix} [ERROR]`, ...args); } /** * Log debug messages to stderr (only if DEBUG env var is set) */ debug(...args: any[]): void { if (process.env.DEBUG) { console.error(`${this.prefix} [DEBUG]`, ...args); } } } // Default logger instance export const logger = new Logger();