Up to EAP7, the modules/system/layers/base/org/apache/activemq/artemis/main folder was expected to contain the following jars:

• artemis-cli
• artemis-dto
• artemis-server
• artemis-selector
• artemis-jms-client
• artemis-jms-server
• artemis-core-client
• artemis-hqclient-protocol
• artemis-jdbc-store
• artemis-service-extensions
• artemis-tools

artemis-tools is no more present in EAP8