Being able to save "tool-call" in saveMessage

[franckdsf]

As part of a custom workflow system triggered by an LLM where steps are rendered dynamically in a chat.
I’d like to be able to save tool-call messages in addition to tool-result messages.

Currently, the saveMessage API only supports saving tool-result messages, but throws an error when attempting to save a message with type: "tool-call".

Example

const id = `call_${nanoid()}`;

await saveMessage(ctx, components.agent, {
  agentName: ctx.agent?.options.name,
  promptMessageId: ctx.messageId,
  threadId: ctx.threadId,
  message: {
    role: "tool",
    content: [{
      type: "tool-call", // ❌ Currently not supported
      toolName: tool,
      toolCallId: id,
      args: args,
    }]
  }
})

When tool calls are long-running, it’s useful to display them in the UI as pending or in-progress.
Right now, there’s no way to persist that intermediate “tool call started” state, only the “tool result” state.