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AgentMark generates speech audio with prompts that declare speech_config in frontmatter. The text to speak goes in a <SpeechPrompt> tag.

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Example configuration

example.prompt.mdx
---
name: speech
speech_config:
  model_name: tts-1-hd
  voice: "nova"
  speed: 1.0
  output_format: "mp3"
---

<System>
Please read this text aloud.
</System>

<SpeechPrompt>
This is a test for the speech prompt to be spoken aloud.
</SpeechPrompt>

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Tags

TagDescription
<SpeechPrompt>The text to convert to speech. AgentMark reads the contents at compile time and sends it to the TTS model.
<System>Optional system-level instructions passed to models that support them.

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Available configuration

PropertyTypeDescriptionRequired
model_namestringThe name of the model to use for speech generation.Yes
voicestringVoice identifier (provider-specific; e.g. for OpenAI TTS: alloy, echo, fable, onyx, nova, shimmer).No
output_formatstringAudio output format (e.g., mp3, opus, aac, flac).No
instructionsstringAdditional instructions for speech generation (provider-specific).No
speednumberPlayback speed multiplier.No

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Running a speech prompt

See Running prompts → Speech generation for the SDK code pattern using Vercel AI SDK’s experimental_generateSpeech. (The experimental_ prefix is upstream — the API may evolve.)

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