diff --git a/.changeset/sveltekit-3-migration.md b/.changeset/pre/sveltekit-3-migration.md
similarity index 100%
rename from .changeset/sveltekit-3-migration.md
rename to .changeset/pre/sveltekit-3-migration.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20feb33..cc9aec0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # kit-on-lambda
 
+## 0.9.0-beta.0
+
+### Minor Changes
+
+- e1001b4: Migrate the adapter to SvelteKit 3 (beta). This release targets SvelteKit 3 only and drops SvelteKit 2 support.
+
+  - Bump the `@sveltejs/kit` peer dependency to `^3.0.0`.
+  - Replace the removed `builder.generateManifest` + `"SERVER"`/`"MANIFEST"` string-substitution flow with `builder.generateServerInstance(...)`. The emitted server module exports a `server` object (from `create_server`), so the node and bun handler/stream entries now `import { server } from "SERVER"` and call `server.init(...)` / `server.respond(...)` directly instead of constructing the deprecated `Server` class.
+  - Read `paths.base` from the flattened `builder.config.paths.base` (`builder.config.kit` was removed).
+  - Replace the deprecated `builder.mkdirp` / `builder.rimraf` with `node:fs`.
+  - Update server instrumentation to the new flow: call `builder.createInstrumentationInitializer(...)`, include the initializer in the bundle, then pass its path to `builder.instrument(...)`.
+
 ## 0.8.4
 
 ### Patch Changes
diff --git a/package.json b/package.json
index d4be24e..0eb9753 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "kit-on-lambda",
-  "version": "0.8.4",
+  "version": "0.9.0-beta.0",
   "description": "SvelteKit adapter for AWS Lambda for Node.js and Bun runtimes",
   "keywords": [
     "adapter",