Hello, I’m looking for guidance on dynamically transferring to a specific VAPI assistant based on an id in the system prompt without creating a large number of static assistants. Let me explain with a simplified example: I have a VAPI assistant that includes an array of tasks in its system prompt, structured like this:

json

[
    {
        "task_name": "Call customer ABC co.",
        "vapi_assistant": "1"
    },
    {
        "task_name": "Call customer XYZ co.",
        "vapi_assistant": "2"
    }
]

Each task requires the assistant to switch to a system prompt tailored for that task. For example, the system prompt for vapi_assistant "1" would look like this:

[Identity]
Your job is to assist the user in completing the Task for customer "ABC co.".

[Context]
Task:
{
    "task_name": "Call customer ABC co.",
    "vapi_assistant": "1"
}

Customer Details:
President: Jon Doe
Industry: Logistics
...etc

The key challenge is dynamically transferring to an assistant for a specific task, where the assistant’s system prompt includes details about the task. It would be ideal if I could use something like the "transferCall" tool to switch to a transient assistant or dynamically modify the current assistant’s system prompt to include the task-specific context. Is there a recommended approach for achieving this without creating a massive squad of individual assistants for each task? Any tips or best practices would be greatly appreciated. Thank you for your help!

@falseVacuum Hello! To dynamically transfer to a specific VAPI assistant based on tasks without creating a large number of static assistants, you can utilize a dynamic system prompt configuration that updates the context of the current assistant on-the-fly. This approach allows you to maintain a single assistant that can adapt its behavior based on the task at hand. Here's a recommended approach: 1. **Dynamic Context Update**: Instead of transferring to different assistants, you can update the system prompt of the current assistant dynamically. This can be done by maintaining a central repository of task-specific prompts and retrieving the appropriate prompt when a task is selected. 2. **Task Selection Mechanism**: Implement a mechanism within your assistant that allows users to select a task. Upon selection, the assistant can fetch the corresponding system prompt details from your repository. 3. **Context Injection**: Once the appropriate system prompt details are retrieved, inject them into the current assistant's context. This can be done programmatically, ensuring that the assistant's behavior is tailored to the selected task. 4. **State Management**: Keep track of the current state within the assistant to manage transitions between tasks and ensure that the context is updated accordingly. 5. **Fallback Strategy**: In case the dynamic update fails or the task-specific prompt is not found, have a fallback strategy that either prompts the user to select a different task or provides a generic response. By following this approach, you can maintain a single, flexible assistant that can handle a variety of tasks by dynamically updating its context. This eliminates the need to create and manage a large number of static assistants. If you need assistance with implementing this approach or have any specific questions about the VAPI functionalities, please let me know, and I'll be happy to help!

Is ther an API for updating the system prompt during an active call? This would absolutely work, but I don't see a way to modify the system prompt during an active call.

@falseVacuum Currently, there isn't a direct API to modify the system prompt of an active VAPI assistant call. However, you can achieve a similar effect by using templates and variables to dynamically set the assistant's properties when starting a call. Here's how you can use templates with variables to customize the assistant for a specific call: 1. **Define Templates**: Create templates for your system prompts with placeholders for variables, like

{{task_name}}

,

{{president_name}}

,

{{industry}}

, etc. 2. **Prepare Context**: Before initiating a call, prepare the context by filling in the template placeholders with the specific details of the task. 3. **Start Call with Custom Context**: When starting a call, pass the prepared context with the filled-in variables to the assistant. This way, the assistant will begin the call with a system prompt tailored to the specific task. 4. **Handle Transitions**: If you need to handle transitions between tasks during a call, you can design your assistant's logic to interpret user input and select the appropriate context for the next task. This would involve managing state within the call and using conditional logic to determine the next steps. While this approach doesn't change the system prompt mid-call, it allows you to start each call with a customized prompt based on the task at hand. If you need to handle multiple tasks within a single call, you would need to design the assistant's logic to manage these transitions internally. If you have further questions or need more detailed guidance on implementing this solution, please let me know!

@falseVacuum The recommended approach is to use squads when involving multiple assistants because it eases the management of context switching between transfers. The main consideration is handling transfers between different assistants without noise or silent transfers, which you can learn more about here: https://www.notion.so/vapi/Silent-Squad-Transfers-14e008c8393f80abbcd6d1a5c10532b8 An alternative approach is using live call control to add inbound system messages to assign different roles to assistants. However, this ultimately functions similarly to squads, so it doesn't offer significant advantages. In conclusion, even when exploring alternatives, squads remain the best solution. I suggest sticking with squads, and I can help guide you through any errors or issues you experience during the transition. https://cdn.discordapp.com/attachments/1328410420511510529/1328761903534706851/Screenshot_2025-01-14_at_21.53.38.png?ex=6787e175&is=67868ff5&hm=f245f32ba73be0387948672e8902cc4f14bca83bd3652ca358b92e43d10beadf&

@falseVacuum you can update the system prompt during a call using the call control url and synding a system message btw.