npm / @sveltejs/adapter-cloudflare

@sveltejs/adapter-cloudflare

What changed in @sveltejs/adapter-cloudflare 8, from its official release notes, upgrade guides and advisories. Sources checked 2026-11-01.

7 breaking9 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

@sveltejs/adapter-cloudflare 816 changes

Replaces builder.generateManifest; use builder.generateServerInstance together with builder.manifest.
8.0.0release notes
The Cloudflare platform is removed; the cloudflare:workers module is emulated instead.
8.0.0release notes
Environment variables are populated before this file is evaluated, and the adapter instrumentation API is updated.
8.0.0release notes
Use platform.ctx instead of the removed platform.context.
8.0.0release notes
SvelteKit 3 is required.
8.0.0release notes
The adapter no longer uses the Cloudflare Workers Cache API and uses Workers Caching instead.
8.0.0release notes
The minimum required Wrangler version is 4.118.0.
8.0.0release notes

Prevents prerendered paths from creating unintended rules in _redirects and _routes.json.
8.0.2release notes
The dev server now starts on runtimes where caches is a getter-only global, such as Deno.
8.0.1release notes
Concurrent Vite servers share one platform proxy, which stays alive until the last server closes.
8.0.1release notes
Local emulation of Cloudflare tracing now supports Span#setStatus.
8.0.1release notes
Local emulation of Cloudflare tracing now supports Span#updateName.
8.0.1release notes
The adapter avoids overriding existing user-defined _headers rules.
8.0.0release notes
Immutable asset 404 responses are no longer cached.
8.0.0release notes
The platform proxy is disposed when the Vite dev or preview server closes.
8.0.0release notes
Prerelease versions of SvelteKit 3 now satisfy the peer dependency range.
8.0.0release notes