feat(cli): add oncall command for issue triage (#17661)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/cli/src/ui/commands/oncallCommand.tsx

@@ -0,0 +1,53 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import {
+  CommandKind,
+  type SlashCommand,
+  type OpenCustomDialogActionReturn,
+} from './types.js';
+import { TriageDuplicates } from '../components/triage/TriageDuplicates.js';
+
+export const oncallCommand: SlashCommand = {
+  name: 'oncall',
+  description: 'Oncall related commands',
+  kind: CommandKind.BUILT_IN,
+  autoExecute: false,
+  subCommands: [
+    {
+      name: 'dedup',
+      description: 'Triage issues labeled as status/possible-duplicate',
+      kind: CommandKind.BUILT_IN,
+      autoExecute: true,
+      action: async (context, args): Promise<OpenCustomDialogActionReturn> => {
+        const { config } = context.services;
+        if (!config) {
+          throw new Error('Config not available');
+        }
+
+        let limit = 50;
+        if (args && args.trim().length > 0) {
+          const argArray = args.trim().split(/\s+/);
+          const parsedLimit = parseInt(argArray[0], 10);
+          if (!isNaN(parsedLimit) && parsedLimit > 0) {
+            limit = parsedLimit;
+          }
+        }
+
+        return {
+          type: 'custom_dialog',
+          component: (
+            <TriageDuplicates
+              config={config}
+              initialLimit={limit}
+              onExit={() => context.ui.removeComponent()}
+            />
+          ),
+        };
+      },
+    },
+  ],
+};