feat: launch Gemini 3 in Gemini CLI 🚀🚀🚀 (in main) (#13287)

Co-authored-by: Adam Weidman <65992621+adamfweidman@users.noreply.github.com>
Co-authored-by: Sehoon Shon <sshon@google.com>
Co-authored-by: Adib234 <30782825+Adib234@users.noreply.github.com>
Co-authored-by: Sandy Tao <sandytao520@icloud.com>
Co-authored-by: Abhi <43648792+abhipatel12@users.noreply.github.com>
Co-authored-by: Aishanee Shah <aishaneeshah@gmail.com>
Co-authored-by: gemini-cli-robot <gemini-cli-robot@google.com>
Co-authored-by: Gal Zahavi <38544478+galz10@users.noreply.github.com>
Co-authored-by: Jacob Richman <jacob314@gmail.com>
Co-authored-by: joshualitt <joshualitt@google.com>
Co-authored-by: Jenna Inouye <jinouye@google.com>

packages/cli/src/config/settingsSchema.ts

@@ -160,6 +160,15 @@ const SETTINGS_SCHEMA = {
     description: 'General application settings.',
     showInDialog: false,
     properties: {
+      previewFeatures: {
+        type: 'boolean',
+        label: 'Preview Features (e.g., models)',
+        category: 'General',
+        requiresRestart: true,
+        default: false,
+        description: 'Enable preview features (e.g., preview models).',
+        showInDialog: true,
+      },
       preferredEditor: {
         type: 'string',
         label: 'Preferred Editor',
@@ -251,6 +260,7 @@ const SETTINGS_SCHEMA = {
         category: 'General',
         requiresRestart: false,
         default: undefined as SessionRetentionSettings | undefined,
+        showInDialog: false,
         properties: {
           enabled: {
             type: 'boolean',