Turbo text-to-video with a webhook subscription

arazzo: 1.0.1
info:
  title: Turbo text-to-video with a webhook subscription
  version: 1.0.0
  summary: >-
    Register a webhook subscription for Turbo events, submit a text prompt to
    Turbo, and poll the task as a fallback until it reaches a terminal status.
sourceDescriptions:
- name: vyond
  url: ../openapi/vyond-openapi-original.json
  type: openapi
workflows:
- workflowId: turbo-generate-with-webhook
  summary: Prompt in, finished video out, with event delivery registered up front.
  description: >-
    Vyond states Turbo webhook events are always emitted for every task, so the
    subscription can be registered before the task completes. Requires a Turbo
    license on the account; without one every Turbo call returns 403. Step 2 spends
    credits and accepts no Idempotency-Key.
  inputs:
    type: object
    required: [webhookUrl, prompt]
    properties:
      webhookUrl:
        type: string
        format: uri
        description: HTTPS endpoint that will receive the signed events.
      webhookName:
        type: string
        default: turbo-events
      prompt:
        type: string
        minLength: 1
        maxLength: 10000
      mode:
        type: string
        enum: [STILL_IMAGE, VIDEO_CLIP]
        default: STILL_IMAGE
  steps:
  - stepId: create-webhook
    description: >-
      Register the subscription. The create response is the ONLY time the secret is
      returned — store it, it is required to verify every delivery.
    operationId: WebhookController.createWebhook
    requestBody:
      contentType: application/json
      payload:
        name: $inputs.webhookName
        url: $inputs.webhookUrl
        events:
        - turbo_generation.succeeded
        - turbo_generation.failed
        status: enabled
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      webhookId: $response.body#/webhookId
      webhookSecret: $response.body#/secret
  - stepId: create-turbo
    description: >-
      Submit the prompt. SPENDS CREDITS. A 422 means malware was detected in an
      uploaded reference file — terminal, do not resubmit.
    operationId: TurboController.createTurbo
    requestBody:
      contentType: application/json
      payload:
        prompt: $inputs.prompt
        mode: $inputs.mode
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      turboId: $response.body#/id
  - stepId: poll-turbo
    description: >-
      Fallback to the webhook. Poll until status is completed, failed or cancelled.
      turbo_generation.cancelled is NOT in the subscribable events enum, so polling
      is the only reliable way to observe a cancellation.
    operationId: TurboController.getTurbo
    parameters:
    - name: id
      in: path
      value: $steps.create-turbo.outputs.turboId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/status
      downloadUrl: $response.body#/downloadUrl
      creditConsumed: $response.body#/creditConsumed
      expiredAt: $response.body#/expiredAt
      turboThreadUrl: $response.body#/turboThreadUrl
  outputs:
    webhookId: $steps.create-webhook.outputs.webhookId
    turboId: $steps.create-turbo.outputs.turboId
    downloadUrl: $steps.poll-turbo.outputs.downloadUrl
    creditConsumed: $steps.poll-turbo.outputs.creditConsumed