chore: import upstream snapshot with attribution

apps/sim/tools/a2a/get_task.ts

@@ -0,0 +1,55 @@
+import { A2A_TASK_OUTPUTS, type A2AGetTaskParams, type A2ATaskResponse } from '@/tools/a2a/types'
+import type { ToolConfig } from '@/tools/types'
+
+export const a2aGetTaskTool: ToolConfig<A2AGetTaskParams, A2ATaskResponse> = {
+  id: 'a2a_get_task',
+  name: 'A2A Get Task',
+  description: 'Retrieve the current state and result of an A2A task.',
+  version: '1.0.0',
+
+  params: {
+    agentUrl: {
+      type: 'string',
+      required: true,
+      visibility: 'user-only',
+      description: 'The A2A agent endpoint URL',
+    },
+    taskId: {
+      type: 'string',
+      required: true,
+      visibility: 'user-or-llm',
+      description: 'The task ID to retrieve',
+    },
+    historyLength: {
+      type: 'number',
+      required: false,
+      visibility: 'user-or-llm',
+      description: 'Maximum number of history messages to include',
+    },
+    apiKey: {
+      type: 'string',
+      required: false,
+      visibility: 'user-only',
+      description: 'API key for authentication (if required)',
+    },
+  },
+
+  request: {
+    url: '/api/tools/a2a/get-task',
+    method: 'POST',
+    headers: () => ({ 'Content-Type': 'application/json' }),
+    body: (params) => {
+      const body: Record<string, unknown> = {
+        agentUrl: params.agentUrl,
+        taskId: params.taskId,
+      }
+      if (params.historyLength !== undefined) body.historyLength = params.historyLength
+      if (params.apiKey) body.apiKey = params.apiKey
+      return body
+    },
+  },
+
+  transformResponse: async (response: Response) => response.json(),
+
+  outputs: A2A_TASK_OUTPUTS,
+}