address review feedback from @AlexHladin

- Bump actions/checkout and actions/setup-node to v6 (latest stable)
  in both the tests and e2e jobs of .github/workflows/ci.yml
- Bump all example runtimes from nodejs20.x to nodejs22.x. Node 20
  reached EOL on April 30 2026; Lambda console removed it then and
  function updates will be blocked from Sep 30 2026. Examples should
  reflect the current recommended runtime so users copying them get a
  supported runtime by default.
- Export AuthenticationType union from src/types/common.ts (derived
  from the existing Auth discriminated union via Auth['type']) and
  use it in e2e/helpers/assertions.ts instead of duplicating the
  literal string union. Keeps the e2e helper and the source of truth
  in sync automatically if a new auth type is ever added.

Re: 'why Node 22 for the e2e job and not the full 20/22/24/26 matrix?'
The CFN output produced by serverless package is identical across Node
versions (no Node-specific code paths in synthesis). The existing
unit-test matrix already verifies plugin logic across all four Node
versions; running the synthesis tests across the same matrix would 4x
CI minutes for zero added signal. 22 specifically matches what the
Release workflow uses, keeping CI consistent.

Author: sid88in

.github/workflows/ci.yml

@@ -17,11 +17,11 @@ jobs:
       matrix:
         node: [20, 22, 24, 26]
     steps:
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node }}
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install dependencies
         run: npm ci
       - name: Lint
@@ -49,8 +49,8 @@ jobs:
     needs: tests
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+        uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
       - name: Install dependencies

e2e/helpers/assertions.ts

@@ -1,4 +1,5 @@
 import { CfnResource, CfnTemplate } from './synthesize';
+import type { AuthenticationType } from '../../src/types/common';
 
 /**
  * Find all resources of a given CloudFormation type.
@@ -96,12 +97,7 @@ function matchesProperties(actual: unknown, expected: unknown): boolean {
  */
 export function expectAuthenticationType(
   template: CfnTemplate,
-  type:
-    | 'API_KEY'
-    | 'AWS_IAM'
-    | 'AMAZON_COGNITO_USER_POOLS'
-    | 'OPENID_CONNECT'
-    | 'AWS_LAMBDA',
+  type: AuthenticationType,
 ): void {
   const { resource } = findOneResourceByType(
     template,

examples/api-keys-multiple/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-api-keys-multiple
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin

examples/basic-api-key/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-basic-api-key
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin

examples/caching/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-caching
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin

examples/cognito-userpools/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-cognito-userpools
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin

examples/custom-domain/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-custom-domain
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin

examples/datasource-eventbridge/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-datasource-eventbridge
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin

examples/datasource-http/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-datasource-http
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin

examples/datasource-none/serverless.yml

@@ -2,7 +2,7 @@ service: appsync-datasource-none
 
 provider:
   name: aws
-  runtime: nodejs20.x
+  runtime: nodejs22.x
 
 plugins:
   - serverless-appsync-plugin