content: /*
   * Copyright 2024-2025 the original author or authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package io.github.a2ap.core.model;
  
  /**
   * Marker interface for task update entities in the A2A protocol.
   * 
   * This interface serves as a common type for all task update events that can be
   * applied to modify the state of a task during its lifecycle. Implementations
   * of this interface represent different types of updates that can occur:
   * 
   * - Status updates (via TaskStatusUpdateEvent)
   * - Artifact updates (via TaskArtifactUpdateEvent)
   * - Other custom update types as needed
   * 
   * The interface enables type-safe handling of various update events in the
   * task management system while maintaining flexibility for future extensions.
   */
  public interface TaskUpdate {
  
  }
  