Effect Has a Free TypeScript Library — The Missing Standard Library for TS

TypeScript Has No Standard Library Python has os, json, datetime, collections, itertools. Go has net/http, encoding/json, fmt. TypeScript has... npm. Want retries? Install a package. Want schema validation? Another package. Want proper error handling? Another package. Want concurrency control? Another package. Effect: A Standard Library for TypeScript Effect is a comprehensive TypeScript library that handles errors, concurrency, retries, streaming, dependency injection, and more — with full type safety. Error Handling That Actually Works In regular TypeScript, errors are invisible: // What can go wrong? TypeScript has no idea. async function getUser(id: string): Promise<User> { const res = await fetch(`/api/users/${id}`) // NetworkError? const data = await res.json() // ParseError? return UserSchema.parse(data) // ValidationError? } With Effect, errors are part of the type: import { Effect } from 'effect' const getUser = (id: string): Effect.Effect< User, // Success type Netwo