Description

After upgrade the ai-sdks to the latest, the exact version are list below, can't get pass the zod validation.

1. setMessages modify the original message object and fill the part property https://github.com/vercel/ai/blob/main/packages/react/src/use-chat.ts#L465
2. I thought the new part property failed the zod validation, so I use convertToCoreMessages this util to remove it, unfortunately still can't pass the validation
3. the part of the user message was removed, but the assistant message is formatted to mismatch the CoreAssistantMessage

Code example

import { convertToCoreMessages } from 'ai';

const res = convertToCoreMessages([
  {
    role: 'assistant',
    content: [
      {
        type: 'text',
        text: 'xxxxxxxxx',
      },
    ],
    parts: [
      {
        type: 'text',
        text: [
          {
            type: 'text',
            text: 'xxxxxxxxxxx',
          },
        ],
      },
    ],
  },
]);

console.log('res', res);

AI provider

"@ai-sdk/provider": "^1.1.0",

Additional context

"@ai-sdk/openai": "^1.3.6",
  "@ai-sdk/openai-compatible": "^0.2.4",
  "@ai-sdk/provider": "^1.1.0",
  "@ai-sdk/provider-utils": "^2.2.3",
  "@ai-sdk/react": "^1.2.5",
  "ai": "^4.2.10"