We have a specific setup for the skeleton in a new project: We always want the name of the skeleton to be capitalized, and we want an event named "callback" and an event named "sound". So when we make a new project, we have to make those additions every time. It would be nice, if the "New Project" could be customized, either through settings or by a "seed" .spine file.
New Project Template
To achieve a customized setup for new projects in Spine, you can create a template project that includes your desired skeleton name, events, and any other settings. You can then duplicate this template project whenever you need to start a new project. This approach allows you to have a consistent starting point with your specific requirements, such as a capitalized skeleton name and predefined events like "callback" and "sound". While Spine does not currently support customizing the "New Project" feature directly through settings or a seed file, using a template project is an effective workaround.
martinr Spine does not have a feature to store project templates, but it seems that what you want to do can be achieved simply by duplicating Spine projects or importing existing skeletons.
By the way, you can also import skeletons via the CLI. If you need to create a large number of projects following specific naming conventions, you may want to use the import command. For more details, please refer to the following section of the Spine User Guide:
https://esotericsoftware.com/spine-command-line-interface#Import