> This page is for SDKs, version Legacy.
> For other versions, use one of these documentation indexes:
> - Current (default): https://buildwithfern.com/learn/sdks/current/llms.txt
> - Legacy: https://buildwithfern.com/learn/sdks/legacy/llms.txt

> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

## 4.61.4

**`(fix):`** WebSocket clients now gracefully handle unknown message types instead of crashing.
When the server sends a message type not yet in the SDK's union, the client logs a
warning and skips the message rather than killing the connection with a validation error.