|string> */ public function rules(): array { return [ 'title' => ['required', 'string', 'max:200'], 'is_done' => ['nullable', 'boolean'], 'due_at' => ['nullable', 'date', 'date_format:Y-m-d\TH:i:s\Z'], 'tags' => ['nullable', 'array'], 'tags.*' => ['string', 'max:50'], ]; } }