guarden: Zero-Dependency TypeScript Runtime Safety (Type Guards, Result/Option Monads)

The Problem with TypeScript Runtime Safety TypeScript gives you compile-time type checking, but at runtime you have zero protection. API responses come back as unknown, JSON.parse() returns any, and one wrong assumption crashes production. const data = JSON.parse(rawInput); // any - no safety const user = data.user; // could be anything user.name.toUpperCase(); // TypeError: Cannot read property 'toUpperCase' of undefined Introducing guarden guarden is a zero-dependency TypeScript-first runtime safety toolkit that closes the gap between compile-time and runtime type safety. GitHub: https://github.com/Avinashvelu03/guarden npm: npm install guarden Key Features 1. 60+ Type Guards with Auto-Narrowing import { isString, isValidEmail, isUUID, isNonEmptyArray, isISO8601Date } from 'guarden'; if (isString(value)) { // TypeScript narrows: value is string here console.log(value.toUpperCase()); // safe! } const emails = data.filter(isValidEmail); // TypeScript infers: emails is string[] 2. Resul