pyproject.toml

[tool.black]
line-length = 88            # Maximum line length before wrapping
target-version = ['py39']   # Python version to target for compatibility
include = '\.pyi?$'         # Files to format (Python files and type stubs)

[tool.mypy]
python_version = "3.9"                  # Python version for type checking
warn_return_any = true                  # Warn when a function returns Any
warn_unused_configs = true              # Warn about unused config options
disallow_untyped_defs = true           # All functions must have type annotations
disallow_incomplete_defs = true         # All parameters must have type annotations
check_untyped_defs = true              # Type check bodies of functions without annotations
disallow_untyped_decorators = true     # Decorators must have type annotations
no_implicit_optional = true            # Don't assume None is valid for missing params
warn_redundant_casts = true            # Warn about unnecessary type casts
warn_unused_ignores = true             # Warn about unnecessary # type: ignore
warn_no_return = true                  # Warn about functions that never return
warn_unreachable = true                # Warn about unreachable code
ignore_missing_imports = true        # Don't error on missing type hints in imports