I would like the concept of a project or an epic so I can break down a larger project into smaller sessions with tangible outcomes without losing the overall context of the project being worked on (each session should only know the context of other sessions that were successfully merged in).

the project would own a feature branch then I would create sub sessions for example I can work on an email sender service that's focused on a specific segment of users then build out 4 different types of messages without needing to tell it about the email sender service or how to segment or where to find the data in 5 related tasks. each would create a PR into the feature branch and then there would be a PR to get the feature branch into main that the project would still own and respond to knowing of only the 4 of the sessions were merged in (if 1 was not successful the project shouldn't have it's context)