Add changelog for 2025-06-13

[quantstruct-bot]

Description

Background Speech Denoising, Cartesia Transcriber, Workflow Enhancements, and Call Error Handling

1. Background Speech Denoising Plan: You can now enhance call quality by configuring advanced background speech denoising options using the new assistant.backgroundSpeechDenoisingPlan.smartDenoisingPlan (default: false), which replaces the previous backgroundDenoisingEnabled setting.

Use the `SmartDenoisingPlan` to filter out background speech and noise using [Krisp technology](https://krisp.ai/). Fine-tune noise reduction with the new `FourierDenoisingPlan` for more control over audio clarity. Smart and Fourier denoising can be combined for optimal results. Order of precedence: Smart denoising, then Fourier denoising.

2. Workflow Server Property: Workflows now support a server property, allowing you to specify a server URL to receive webhook callbacks for workflow events directly.

3. New Workflow Models: You can now integrate Google's LLMs or custom models into your workflows by specifying Google or Custom LLM in your workflow model settings. Select your model under Model Settings

4. Enhanced Error Reporting for Cartesia Services: A new endedReason value pipeline-error-cartesia-502-server-error has been added to help you identify and handle specific errors related to Cartesia server issues.

5. Enhanced Error Handling and Status Enums: We've added new error enums and status codes to help you better handle and debug call-related issues:

   • VAPI Fault Errors: Detect specific VAPI-related errors during call start using call.start.error-vapifault-get-org and call.start.error-vapifault-get-subscription

   • Subscription Status Errors: Identify subscription-related issues with new enums:

     • call.start.error-subscription-frozen (replaces unknown-error)
     • call.start.error-subscription-insufficient-credits

   • Call Completion Statuses: Track how calls are completed with new enums:

     • call.in-progress.twilio-completed-call
     • call.in-progress.sip-completed-call

   • In-Call Error Detection: Handle specific errors during active calls using enums like call.in-progress.error-vapifault-chat-pipeline-failed-to-start

Testing Steps

• Run the app locally using fern docs dev or navigate to preview deployment
• Ensure that the changed pages and code snippets work

[github-actions]

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