Every software project has its own aura. That aura existed before the project was even started. It gave birth to the project and will be alive when the project will be decommissioned and/or replaced with some other project. This aura is The Full Context.
The Full Context consists of all information directly or indirectly related to the project. It's the single source of truth for every single decision related to the project, from the decision to start it to the name of every variable in the code.