haystack/releasenotes/notes/conditional-routes-validation-b46fc506d35894d4.yaml

---
enhancements:
  - |
    Add output type validation in `ConditionalRouter`.
    Setting `validate_output_type` to `True` will enable a check to verify if
    the actual output of a route returns the declared type.
    If it doesn't match a `ValueError` is raised.