messages-services-actions

If your package defines its own messages, services or actions you should add them to the corresponding meta-package:

./<package_name>_msgs
├── action
│   ├── MyAction.action
├── msg
│   ├── MyMessage.msg
├── srv
│   └── MyService.srv
├── CMakeLists.txt
├── package.xml
└── README.md

Depending on the repository you are working on, the meta-package is related to the domaing, e.g. mdr_planning_msgs or mdr_navigation_actions