001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2025-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.chat;
019
020import dev.enola.identity.Subject;
021
022import java.util.function.Consumer;
023
024/**
025 * Agent is something which acts on a {@link Message}.
026 *
027 * <p>Agents can use other agents, web APIs, etc. to act. Agents interact with an environment.
028 *
029 * <p>Agents are also known as a "Bots" or "Tool/s (Providers)" or "Functions" or "Services" or
030 * "Service Providers".
031 */
032public interface Agent extends Consumer<Message> {
033
034    Subject subject();
035}