feat: BREAKING CHANGE - Upgrade minimum required Node version to Node 22. Context: https://docs.cloud.google.com/nodejs/getting-started/supported-nodejs-versions

PiperOrigin-RevId: 944567547

Author: sararob

.github/workflows/presubmit.yaml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [20, 22, 24]
+        node: [22, 24, 26]
     steps:
       - uses: actions/checkout@v5
       - uses: actions/setup-node@v4

README.md

@@ -10,7 +10,7 @@ page in Agent Platform documentation.
 
 ## Before you begin
 
-1.  Make sure your node.js version is 20 or above.
+1.  Make sure your node.js version is 22 or above.
 1.  [Select](https://console.cloud.google.com/project) or [create](https://cloud.google.com/resource-manager/docs/creating-managing-projects#creating_a_project) a Google Cloud project.
 1.  [Enable billing for your project](https://cloud.google.com/billing/docs/how-to/modify-project).
 1.  [Enable the Agent Platform API](https://console.cloud.google.com/flows/enableapi?apiid=aiplatform.googleapis.com).

package.json

@@ -5,7 +5,7 @@
   "license": "Apache-2.0",
   "author": "Google LLC",
   "engines": {
-    "node": ">=20.0.0"
+    "node": ">=22.0.0"
   },
   "homepage": "https://github.com/googleapis/nodejs-agentplatform",
   "repository": "googleapis/nodejs-agentplatform",