next.js/packages/font/src/google/google-fonts-metadata.ts

import fontData from './font-data.json'

type GoogleFontsMetadata = {
  [fontFamily: string]: {
    weights: string[]
    styles: string[]
    subsets: string[]
    axes?: Array<{
      tag: string
      min: number
      max: number
      defaultValue: number
    }>
  }
}

export const googleFontsMetadata: GoogleFontsMetadata = fontData