Variable: FRAMEWORK_BUILD_PREFIXES

const FRAMEWORK_BUILD_PREFIXES: readonly ["/_next/", "/_nuxt/", "/_astro/", "/_app/"]

Framework build-output path prefixes — hashed/immutable assets the framework already fingerprints; never route them through the image CDN. Covers Next/Nuxt/Astro/SvelteKit (underscore-prefixed → collision-free with merchant public/ folders). Override via ImageLoaderConfig.buildAssetPrefixes for other conventions (e.g. a Vite-based framework serving build output under /assets/, which can collide with public/assets/).