this aint working when tried to interrupt using add-message | vapi.send triggerResponseEnabled- this also set to true

According to the Vapi documentation, the first message cannot be interrupted and is guaranteed to be spoken, which explains why

firstMessageInterruptionsEnable: true

isn't working as expected. Try using the

mute-assistant

control message instead:

javascript
vapi.send({
  type: 'control',
  control: 'mute-assistant'
})

This will stop the current LLM generation regardless of whether it's the first message or not. Sources: - [Vapi Documentation](https://docs.vapi.ai/quickstart/dashboard) - [Discord Discussion](https://discord.com/channels/1211482211119796234/1338730919904673853)

Hey! To help track down this issue, could you share: - The call ID - When exactly this happened (the timestamp) - What response you expected to get - What response you actually got instead This would really help us figure out what went wrong!

I fixed it by keeping the firstMessage as empty, and putting the first message in the system prompt. since any voice output coming due to system prompt is interruptable, it works.

Hi, My understanding is that by default, VAPI agents are passive at session start — they wait for the user to speak first before responding, unless explicitly configured to begin with a spoken message. So how did you handle this if you leave the first message empty.

This ticket has been marked as solved, and as a result, you will no longer receive any further responses. Kindly create a new support ticket to escalate your inquiry. 

assistant-speaks-first-with-model-generated-message enable it

To have the assistant speak first with a model-generated, interruptible message, set the

firstMessage

to an empty string and place your initial greeting or instruction in the system prompt. For example:

js
const assistantConfig = {
  firstMessage: "",
  model: {
    provider: "openai",
    model: "gpt-4",
    messages: [
      {
        role: "system",
        content: "Hi there! How can I help you today?"
      }
    ]
  },
  // ...other config
};

This ensures the assistant starts the conversation and its first message can be interrupted if needed. Note: There is no documented

assistant-speaks-first-with-model-generated-message

flag—use the system prompt as shown above. Source: - [Vapi Web SDK Documentation](https://docs.vapi.ai/sdk/web)