diff --git a/packages/appsync-modelgen-plugin/src/plugin.ts b/packages/appsync-modelgen-plugin/src/plugin.ts
index e66e9c14..52738812 100644
--- a/packages/appsync-modelgen-plugin/src/plugin.ts
+++ b/packages/appsync-modelgen-plugin/src/plugin.ts
@@ -11,6 +11,9 @@ import { AppSyncModelDartVisitor } from './visitors/appsync-dart-visitor';
 import { AppSyncModelIntrospectionVisitor } from './visitors/appsync-model-introspection-visitor';
 import { SyncTypes } from './types/sync';
 
+/**
+ * @internal
+ */
 export const pluginSync: SyncTypes.PluginFunction<RawAppSyncModelConfig> = (
   schema: GraphQLSchema,
   rawDocuments: Types.DocumentFile[],
diff --git a/packages/appsync-modelgen-plugin/src/preset.ts b/packages/appsync-modelgen-plugin/src/preset.ts
index c27a16e3..267342d4 100644
--- a/packages/appsync-modelgen-plugin/src/preset.ts
+++ b/packages/appsync-modelgen-plugin/src/preset.ts
@@ -351,6 +351,9 @@ const buildGenerations = (options: PresetFnArgs): GenerateOptions[] => {
     }
   };
 
+/**
+ * @internal
+ */
 export const presetSync: SyncTypes.OutputPreset<AppSyncModelCodeGenPresetConfig> = {
   buildGeneratesSection: (options: SyncTypes.PresetFnArgs<AppSyncModelCodeGenPresetConfig>): SyncTypes.GenerateOptions[] => {
     const {cache, pluginMap, ...otherOptions} = options;
diff --git a/packages/appsync-modelgen-plugin/src/types/sync.ts b/packages/appsync-modelgen-plugin/src/types/sync.ts
index e1dfc05f..550d83ad 100644
--- a/packages/appsync-modelgen-plugin/src/types/sync.ts
+++ b/packages/appsync-modelgen-plugin/src/types/sync.ts
@@ -17,6 +17,9 @@ export type SyncCache<Obj extends CacheContainer> = Omit<Obj, 'cache'> & {
     cache?: (<T>(namespace: string, key: string, factory: () => T) => T) | undefined
 };
 
+/**
+ * @internal
+ */
 export declare namespace SyncTypes {
     type GenerateOptions = SyncCache<SyncPluginMap<Types.GenerateOptions>>;
 
diff --git a/packages/graphql-generator/src/models.ts b/packages/graphql-generator/src/models.ts
index fd85cfcd..b1b5c836 100644
--- a/packages/graphql-generator/src/models.ts
+++ b/packages/graphql-generator/src/models.ts
@@ -82,6 +82,9 @@ export async function generateModels(options: GenerateModelsOptions): Promise<Ge
   ).then((outputs: GeneratedOutput[]) => outputs.reduce((curr, next) => ({ ...curr, ...next }), {}));
 }
 
+/**
+ * @internal
+ */
 export function generateModelsSync(options: GenerateModelsOptions): GeneratedOutput {
   const appsyncLocalConfig = appSyncDataStoreCodeGen.presetSync.buildGeneratesSection({
     ...mapBuilderOptions(options),