Setup Env Validation

t3-env + zod for type-safe env vars. Single src/env.ts source of truth. PostToolUse hook block raw process.env. in TS/TSX/JS/JSX (skip env files + tests).

Steps

1. Install

bun add @t3-oss/env-core zod

2. Create src/env.ts

import { createEnv } from "@t3-oss/env-core";
import { z } from "zod";