from pathlib import Path

from pydantic_settings import BaseSettings

PROJECT_ROOT = Path(__file__).parent.parent


class Settings(BaseSettings):
    anthropic_api_key: str
    model: str = "claude-sonnet-4-5-20250929"
    safedir: str = "./workspace"
    max_tokens: int = 500

    model_config = {"env_file": PROJECT_ROOT / ".env"}


# create singleton instance, causes validation
settings = Settings()