Prompt Cleaner MCP Server

import * as dotenv from "dotenv"; dotenv.config(); export type LogLevel = "error" | "warn" | "info" | "debug"; export interface AppConfig { apiBase: string; // OpenAI-compatible base URL, e.g. http://localhost:1234/v1 apiKey?: string; // optional model: string; timeoutMs: number; logLevel: LogLevel; enforceLocalApi: boolean; forceJson: boolean; maxRetries: number; contentMaxRetries: number; backoffMs: number; backoffJitter: number; // 0..1 multiplier range } function parseNumber(val: string | undefined, fallback: number): number { if (!val) return fallback; const n = Number(val); return Number.isFinite(n) && n > 0 ? n : fallback; } function parseLogLevel(val: string | undefined, fallback: LogLevel): LogLevel { switch ((val || "").toLowerCase()) { case "error": case "warn": case "info": case "debug": return val as LogLevel; default: return fallback; } } function parseBoolean(val: string | undefined, fallback: boolean): boolean { if (!val) return fallback; const v = val.trim().toLowerCase(); if (["1", "true", "yes", "y", "on"].includes(v)) return true; if (["0", "false", "no", "n", "off"].includes(v)) return false; return fallback; } function parseFraction(val: string | undefined, fallback: number): number { const n = Number(val); if (!Number.isFinite(n)) return fallback; return Math.min(1, Math.max(0, n)); } export const config: AppConfig = { apiBase: process.env.LLM_API_BASE?.trim() || "http://localhost:1234/v1", apiKey: process.env.LLM_API_KEY || undefined, model: process.env.LLM_MODEL?.trim() || "open/ai-gpt-oss-20b", timeoutMs: parseNumber(process.env.LLM_TIMEOUT_MS, 60_000), logLevel: parseLogLevel(process.env.LOG_LEVEL, "info"), enforceLocalApi: parseBoolean(process.env.ENFORCE_LOCAL_API, false), forceJson: parseBoolean(process.env.LLM_FORCE_JSON, false), maxRetries: Math.max(0, Math.floor(parseNumber(process.env.LLM_MAX_RETRIES, 1))), contentMaxRetries: Math.max( 0, Math.floor(parseNumber(process.env.RETOUCH_CONTENT_MAX_RETRIES, 1)), ), backoffMs: parseNumber(process.env.LLM_BACKOFF_MS, 250), backoffJitter: parseFraction(process.env.LLM_BACKOFF_JITTER, 0.2), }; export function assertLocalBaseUrl(base: string) { try { const u = new URL(base); if (config.enforceLocalApi) { const host = (u.hostname || "").toLowerCase(); const isLocal = host === "localhost" || host === "127.0.0.1" || host === "::1"; if (!isLocal) { throw new Error("LLM_API_BASE must be local (localhost, 127.0.0.1, or ::1)"); } } } catch (e) { throw new Error(`Invalid LLM_API_BASE: ${String(e instanceof Error ? e.message : e)}`); } }