diff --git a/sdk/base/lib/actions/input/inputSpecConstants.ts b/sdk/base/lib/actions/input/inputSpecConstants.ts
index c1b6fe49e..8fe4eb098 100644
--- a/sdk/base/lib/actions/input/inputSpecConstants.ts
+++ b/sdk/base/lib/actions/input/inputSpecConstants.ts
@@ -247,10 +247,7 @@ export type SmtpSelection =
  * Zod schema for persisting SMTP selection in a store file model.
  * Use this instead of `smtpInputSpec.validator` to avoid cross-zod-instance issues.
  */
-export const smtpShape: {
-  parse(data: unknown): SmtpSelection
-  _output: SmtpSelection
-} = z
+export const smtpShape: z.ZodType<SmtpSelection> = z
   .discriminatedUnion('selection', [
     z.object({
       selection: z.literal('disabled'),
diff --git a/sdk/package/lib/StartSdk.ts b/sdk/package/lib/StartSdk.ts
index 6f4e9cd47..6bf925141 100644
--- a/sdk/package/lib/StartSdk.ts
+++ b/sdk/package/lib/StartSdk.ts
@@ -11,7 +11,6 @@ import * as patterns from '../../base/lib/util/patterns'
 import { Backups } from './backup/Backups'
 import {
   smtpInputSpec,
-  smtpShape,
   systemSmtpSpec,
   customSmtp,
   smtpProviderVariants,
@@ -409,7 +408,6 @@ export class StartSdk<Manifest extends T.SDKManifest> {
       },
       inputSpecConstants: {
         smtpInputSpec,
-        smtpShape,
         systemSmtpSpec,
         customSmtp,
         smtpProviderVariants,
diff --git a/sdk/package/lib/index.ts b/sdk/package/lib/index.ts
index 13427fe21..06f99b915 100644
--- a/sdk/package/lib/index.ts
+++ b/sdk/package/lib/index.ts
@@ -30,6 +30,10 @@ export { SubContainer } from './util/SubContainer'
 export { StartSdk } from './StartSdk'
 export { setupManifest, buildManifest } from './manifest/setupManifest'
 export { FileHelper } from './util/fileHelper'
+export {
+  smtpShape,
+  type SmtpSelection,
+} from '../../base/lib/actions/input/inputSpecConstants'
 
 export * as actions from '../../base/lib/actions'
 export * as backup from './backup'