Hyperbolic Chat To Speech

arazzo: 1.0.1
info:
  title: Hyperbolic Chat To Speech
  summary: Generate an assistant reply with an LLM, then narrate it with text-to-speech.
  description: >-
    Chains Hyperbolic's chat completions and audio generation (text-to-speech)
    endpoints into a voice assistant pipeline. A language model produces a
    concise spoken-style answer, and that answer is converted to base64 speech
    audio. Each step inlines its request and inline Authorization Bearer
    credential so the flow reads and runs without opening the OpenAPI sources.
  version: 1.0.0
sourceDescriptions:
- name: chatCompletionsApi
  url: ../openapi/hyperbolic-chat-completions-api-openapi.yml
  type: openapi
- name: audioGenerationApi
  url: ../openapi/hyperbolic-audio-generation-api-openapi.yml
  type: openapi
workflows:
- workflowId: chat-to-speech
  summary: Produce a chat answer and narrate it as base64 speech audio.
  description: >-
    Sends a question to a chat model asking for a concise, speech-friendly
    answer, then passes the answer text to the text-to-speech endpoint to
    produce narrated audio.
  inputs:
    type: object
    required:
    - apiKey
    - chatModel
    - question
    properties:
      apiKey:
        type: string
        description: Hyperbolic API key passed as a Bearer token.
      chatModel:
        type: string
        description: Chat model id used to author the spoken answer.
      question:
        type: string
        description: The question to answer and narrate.
      language:
        type: string
        description: TTS language code (e.g. EN, ES, FR, JA, ZH, KR).
      speed:
        type: number
        description: Speech speed between 0.5 and 2.0.
      voice:
        type: string
        description: Optional speaker / voice id for the TTS model.
  steps:
  - stepId: answer
    description: >-
      Ask the chat model for a concise, natural spoken-style answer suitable for
      narration.
    operationId: createChatCompletion
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.apiKey"
    requestBody:
      contentType: application/json
      payload:
        model: $inputs.chatModel
        messages:
        - role: system
          content: >-
            You answer in a concise, natural spoken style of two or three
            sentences with no markdown or lists.
        - role: user
          content: $inputs.question
        max_tokens: 300
        temperature: 0.6
        stream: false
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      answer: $response.body#/choices/0/message/content
  - stepId: narrate
    description: >-
      Convert the chat answer to speech audio and capture the base64 audio and
      its duration.
    operationId: generateAudio
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.apiKey"
    requestBody:
      contentType: application/json
      payload:
        text: $steps.answer.outputs.answer
        language: $inputs.language
        speed: $inputs.speed
        voice: $inputs.voice
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      audio: $response.body#/audio
      duration: $response.body#/duration
  outputs:
    answer: $steps.answer.outputs.answer
    audio: $steps.narrate.outputs.audio
    duration: $steps.narrate.outputs.duration