chore: import upstream snapshot with attribution

apps/sim/lib/api/contracts/tools/a2a.ts

@@ -0,0 +1,59 @@
+import { z } from 'zod'
+import { genericToolResponseSchema } from '@/lib/api/contracts/tools/shared'
+import { defineRouteContract } from '@/lib/api/contracts/types'
+import { RawFileInputSchema } from '@/lib/uploads/utils/file-schemas'
+
+const a2aBaseBodySchema = z.object({
+  agentUrl: z.string().url('Agent URL must be a valid URL').max(2048),
+  apiKey: z.string().optional(),
+})
+
+export const a2aSendMessageBodySchema = a2aBaseBodySchema.extend({
+  message: z.string().min(1, 'Message is required'),
+  data: z.union([z.string(), z.record(z.string(), z.unknown())]).optional(),
+  files: z.array(RawFileInputSchema).max(20).optional(),
+  taskId: z.string().optional(),
+  contextId: z.string().optional(),
+})
+
+export const a2aGetTaskBodySchema = a2aBaseBodySchema.extend({
+  taskId: z.string().min(1, 'Task ID is required'),
+  historyLength: z
+    .number()
+    .int()
+    .positive()
+    .max(1000, 'History length cannot exceed 1000')
+    .optional(),
+})
+
+export const a2aCancelTaskBodySchema = a2aBaseBodySchema.extend({
+  taskId: z.string().min(1, 'Task ID is required'),
+})
+
+export const a2aGetAgentCardContract = defineRouteContract({
+  method: 'POST',
+  path: '/api/tools/a2a/get-agent-card',
+  body: a2aBaseBodySchema,
+  response: { mode: 'json', schema: genericToolResponseSchema },
+})
+
+export const a2aSendMessageContract = defineRouteContract({
+  method: 'POST',
+  path: '/api/tools/a2a/send-message',
+  body: a2aSendMessageBodySchema,
+  response: { mode: 'json', schema: genericToolResponseSchema },
+})
+
+export const a2aGetTaskContract = defineRouteContract({
+  method: 'POST',
+  path: '/api/tools/a2a/get-task',
+  body: a2aGetTaskBodySchema,
+  response: { mode: 'json', schema: genericToolResponseSchema },
+})
+
+export const a2aCancelTaskContract = defineRouteContract({
+  method: 'POST',
+  path: '/api/tools/a2a/cancel-task',
+  body: a2aCancelTaskBodySchema,
+  response: { mode: 'json', schema: genericToolResponseSchema },
+})