Prompt Cleaner MCP Server

import { config, LogLevel } from "./config.js"; import { redactSecrets } from "./redact.js"; function ts() { return new Date().toISOString(); } function levelOrder(l: LogLevel): number { return { error: 0, warn: 1, info: 2, debug: 3 }[l]; } function redactPreview(s: string, limit = 160): string { const red = redactSecrets(s).text; const preview = red.length > limit ? red.slice(0, limit) + "…" : red; return preview; } export type LogContext = Record<string, unknown>; function write(level: LogLevel, msg: string, ctx?: LogContext) { if (levelOrder(level) > levelOrder(config.logLevel)) return; const payload = { time: ts(), level, msg, ...ctx }; // Always log to stderr to avoid interfering with MCP stdio protocol try { process.stderr.write(JSON.stringify(payload) + "\n"); } catch { // best-effort } } export const logger = { info: (msg: string, ctx?: LogContext) => write("info", msg, ctx), warn: (msg: string, ctx?: LogContext) => write("warn", msg, ctx), error: (msg: string, ctx?: LogContext) => write("error", msg, ctx), debug: (msg: string, ctx?: LogContext) => write("debug", msg, ctx), preview: redactPreview, };