|string> */ public function rules(): array { return [ 'project_id' => ['required', 'exists:prompt_projects,id'], 'provider_id' => ['required', 'exists:ai_providers,id'], 'model_id' => ['required', 'exists:ai_models,id'], 'temperature' => ['nullable', 'numeric', 'min:0', 'max:1'], 'max_tokens' => ['nullable', 'integer', 'min:1'], ]; } }