Support for a validator argument to enable runtime validation

A while ago I created https://github.com/bloomberg/attrs-strict a library to help with runtime validation of attrs classes.

The way it currently works is you need to "enable" it per attribute in the following manner:
attr.ib(validator=type_validator(), type=List[Tuple[str, str]])

But if you have multiple fields, and you want to apply the validation on all of them, it becomes repetitive. Additionally, you might miss adding it for some attributes.

Would you consider an argument that could enable it for all the existing attributes in an attrs class ?
Something along the lines:

attr.s(validate_with=type_validator())
class Something:
   ...

Start by reviewing the attr.s and attr.ib APIs and the linked attrs-strict library to understand the proposed validator flow. Done means a class-level option can apply the requested validator to all existing attributes without repeating validator= on each field, with the behavior agreed and verified in the project’s tests.