diff --git a/.changeset/frontends-option.md b/.changeset/frontends-option.md
index 9e02462..e32ea47 100644
--- a/.changeset/frontends-option.md
+++ b/.changeset/frontends-option.md
@@ -1,5 +1,5 @@
 ---
-'@solidjs/vite-plugin': minor
+'@solidjs/vite-plugin': patch
 ---
 
 Add a `frontends` option: other languages that lower to Solid can claim a file extension and compile its modules themselves (`frontends: { ".x": x() }`). A front end's `compile(source, { id, moduleId, ssr, root, solid, addWatchFile })` returns `{ code, map, css }`, given the compiler options this plugin would use for a JSX module in that environment; the result then takes the lowered `.tsrx` route (lazy and refresh passes, server functions keyed by the module's real path, `css` as a CSS module, dep scanning). Server functions in a front end's modules need `@solidjs/compiler` with secondary passes that accept any extension. `.rx` (ReactiveScript) is built in: with `@reactivescript/compiler` installed in the project, `.rx` modules compile with no option.
diff --git a/README.md b/README.md
index aa9507c..6174d3d 100644
--- a/README.md
+++ b/README.md
@@ -949,6 +949,30 @@ configureServerFunctionsServer({
 
 Set `csrf: false` only when another trusted layer protects the endpoint.
 
+Custom serialization (extra seroval plugins for class instances such as a
+`Money` or an `ObjectId`) is configured the same way, once per side. Set the
+server codec in the `configure` module and the client codec in
+[`start.clientSetup`](#optionsstart), both from one shared options module:
+
+```ts
+// src/serialization.ts
+import type { JSONCodecOptions } from '@solidjs/web/serialization';
+export default { plugins: [MoneyPlugin] } satisfies JSONCodecOptions;
+
+// src/server-config.ts (serverFunctions.configure)
+import { configureServerFunctionsServer } from '@solidjs/web/server-functions/server';
+import codec from './serialization';
+configureServerFunctionsServer({ codec });
+
+// src/client-setup.ts (start.clientSetup)
+import { configureServerFunctionsClient } from '@solidjs/web/server-functions/client';
+import codec from './serialization';
+configureServerFunctionsClient({ codec });
+```
+
+Both sides must use the same plugins. This covers server-function arguments
+and results; the SSR hydration payload takes its own `plugins` option.
+
 Meta-frameworks that need to control plugin ordering and dispatch requests
 through their own server should use the standalone `serverFunctions()`
 export instead, which never installs the dev middleware. See