add_min_line_width# Rules.add_min_line_width(name: str, value: str, layers: list[str] | None = None) → Rules# Append a minimum line width rule. Parameters: namestrRule identifier for reporting. valuestrMinimum width with unit (e.g., "3.5mil", "0.1mm"). layerslist of str or None, optionalLayer names to apply rule to. If None, applies to all signal layers. The default is None. Returns: RulesSelf for method chaining. Examples >>> rules = Rules().add_min_line_width("trace_width", "3.5mil") >>> len(rules.min_line_width) 1