Control Prompts

Mynth supports both simple prompt strings and structured prompt objects.

Simple prompts

prompt: "An orange cat astronaut on the moon";

Use this form when you want the smallest possible request.

Use the structured form when you need negative prompts or explicit enhancement control:

prompt: {
  positive: "Luxury skincare product photo on sculpted stone",
  negative: "text, watermark, blurry details",
  enhance: "prefer_magic",
}

prompt.enhance controls whether Mynth rewrites your prompt before sending it to the model:

false - no enhancement, prompt is sent as-is
"prefer_magic" - Mynth may rewrite the prompt for better results
"prefer_native" - Mynth may rewrite the prompt, preferring the model’s native style

Negative prompts are supported through the structured prompt object:

prompt: {
  positive: "Editorial portrait of a cyclist in the rain",
  negative: "text, watermark, extra limbs",
  enhance: false,
}

Whether negative prompts are meaningful depends on the model you selected, so explicit model choice matters here.