public int getHistoryAssistantSummaryMaxChars() {
        return 800;
    }

    // --- Concurrency control ---

    /**
     * Gets the maximum number of concurrent requests to the LLM provider.
     * Default is 5. Override or configure via rag.llm.{provider}.max.concurrent.requests.
     *
     * @return the maximum concurrent requests
     */
    protected int getMaxConcurrentRequests() {

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.ds;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CountDownLatch;

import org.codelibs.fess.Constants;
import org.codelibs.fess.ds.callback.IndexUpdateCallback;
import org.codelibs.fess.entity.DataStoreParams;
import org.codelibs.fess.exception.JobProcessingException;

import java.lang.reflect.InvocationTargetException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Consumer;

import org.codelibs.fess.Constants;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

 */
package org.codelibs.fess.helper;

import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

import org.codelibs.fess.helper.LogNotificationHelper.LogNotificationEvent;

 */
package org.codelibs.fess.helper;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Consumer;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.helper;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicInteger;

import org.codelibs.core.timer.TimeoutManager;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.timer.LogNotificationTarget;

 */
package org.codelibs.fess.exec;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.PrintStream;
import java.lang.reflect.Method;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicInteger;

import org.codelibs.core.misc.DynamicProperties;
import org.codelibs.fess.exception.ContainerNotAvailableException;
import org.codelibs.fess.helper.SystemHelper;

import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.concurrent.CommonPoolUtil;
import org.codelibs.core.lang.StringUtil;

 */
package org.codelibs.fess.exec;

import java.io.File;
import java.lang.management.ManagementFactory;
import java.time.LocalDateTime;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.misc.DynamicProperties;

        assertNotNull(retrieved);
        assertEquals(engine, retrieved);
    }

    // Test concurrent-like scenario (sequential but simulating concurrent behavior)
    @Test
    public void test_add_multipleSameNameSequential() {
        TestScriptEngine engine1 = new TestScriptEngine("v1");