Directory

Directories organize objects inside a project. They form the hierarchy you see when browsing with tree or ls, and let large analyses stay navigable as they grow.

How they are used

Group related algorithms and tasks by analysis stage: /preselection, /fitting, /systematics.
Paths are slash-separated and absolute from the project root, so an object always has one unambiguous location.
Directories participate in the dependency graph like any other object — moving or updating a group keeps its internal structure intact.

celebi> tree
/
├── preselection
│   ├── algo/selection
│   └── task/selection_v1
└── fitting
    ├── algo/fit_model
    └── task/fit_v1