I ran v15 codemod and I ended up with this:
{ "name": "codemods-01", "version": "0.1.0", "private": true, "scripts": { "dev": "next dev --turbopack", "build": "next build", "start": "next start", "lint": "next lint" }, "dependencies": { "react": "19.0.0-rc-66855b96-20241106", "react-dom": "19.0.0-rc-66855b96-20241106", "next": "15.0.3" }, "devDependencies": { "typescript": "^5", "@types/node": "^20", "@types/react": "npm:types-react@19.0.0-rc.1", "@types/react-dom": "npm:types-react-dom@19.0.0-rc.1", "postcss": "^8", "tailwindcss": "^3.4.1", "eslint": "^8", "eslint-config-next": "15.0.3" }, "overrides": { "@types/react": "npm:types-react@19.0.0-rc.1", "@types/react-dom": "npm:types-react-dom@19.0.0-rc.1" } }

What is this:

"@types/react": "npm:types-react@19.0.0-rc.1", "@types/react-dom": "npm:types-react-dom@19.0.0-rc.1", "overrides": { "@types/react": "npm:types-react@19.0.0-rc.1", "@types/react-dom": "npm:types-react-dom@19.0.0-rc.1" }

What is this sorcery? I don't want this. Thanks.

Also, if i create a new next.js 15 app using create-next-app@latest I end up with this:

{ "name": "nextjs-01", "version": "0.1.0", "private": true, "scripts": { "dev": "next dev", "build": "next build", "start": "next start", "lint": "next lint" }, "dependencies": { "react": "19.0.0-rc-66855b96-20241106", "react-dom": "19.0.0-rc-66855b96-20241106", "next": "15.0.3" }, "devDependencies": { "typescript": "^5", "@types/node": "^20", "@types/react": "^18", "@types/react-dom": "^18", "postcss": "^8", "tailwindcss": "^3.4.1", "eslint": "^8", "eslint-config-next": "15.0.3" } }

here as you can see does not have that npm:types stuff. 🤔