While using the types, I hit two cases where the type definitions disagree with what index.js actually does.

color allows true, but the setter rejects it

color is typed as Color | boolean on both Options and the Ora interface, so color: true type-checks. At runtime the setter throws for anything that is not a valid color or false:

set color(value) {
	if (value !== undefined && value !== false && !validColors.has(value)) {
		throw new Error('The `color` option must be a valid color or `false` to disable');
	}

	this.#color = value;
}

So this compiles but throws:

ora({color: true}); // Error: The `color` option must be a valid color or `false` to disable

false is meaningful (it disables the color), but true is not a valid value. This narrows the type to Color | false in both places.

prefixText/suffixText on the Ora interface drop the function form

On the Ora interface, prefixText and suffixText are typed as string, but the implementation resolves a function by calling it:

#formatAffix(value, separator, placeBefore = false) {
	const resolved = typeof value === 'function' ? value() : value;
	...
}

The JSDoc on both members already says "text or function that returns text", the PrefixTextGenerator/SuffixTextGenerator types are already exported, and Options and PersistOptions already use string | PrefixTextGenerator / string | SuffixTextGenerator. Only the Ora interface members were left as plain string, so assigning a function to spinner.prefixText is a type error even though it works at runtime. This widens them to match.

Tests

Added tsd assertions for the rejected color: true and for the function forms of prefixText/suffixText.