Human Layer String Errors Minimal Reproduction

hl_example.py

# /// script
# requires-python = ">=3.11"
# dependencies = [
#     "humanlayer==0.7.9",
#     "pydantic==2.11.5",
# ]
# ///

import humanlayer
from datetime import date
from pydantic import BaseModel

hl = humanlayer.HumanLayer(verbose=True)

class User(BaseModel):
    name: str
    age: int
    dob: date


@hl.require_approval()
def approve_fn(x: User) -> User:
    return x

if __name__ == "__main__":
    user = User(name="John Doe", age=25, dob=date(1990, 1, 1))
    print(approve_fn(x=user))