AI Tool Protocol Serializer (aiSdk/toolProtocol.ts)

Serializes and parses chat message content and legacy tool calls for AI SDKs. Use this to normalize data between different AI model interfaces and chat message formats.

// Source: https://github.com/ThinkInAIXYZ/deepchat | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
// Provided via justclaw.it.com; keep this notice with the code.
import type { ChatMessage } from '@shared/types/core/chat-message'
import { generateId } from 'ai'
import { jsonrepair } from 'jsonrepair'

export interface ParsedLegacyToolCall {
  id: string
  type: 'function'
  function: {
    name: string
    arguments: string
  }
}

export function serializeChatMessageContent(content: ChatMessage['content']): string {
  if (content == null) {
    return ''
  }

  if (typeof content === 'string') {
    return content
  }

  return content
    .map((part) => {
      if (part.type === 'text') {
        return part.text
      }

      if (part.type

... (truncated -- full source via MCP)