Migrate an Existing Model¶

If you already have a monolithic MCNP input file, use the migrate command to convert it into a Gitronics project structure automatically.

gitronics migrate path/to/my_model.mcnp --output-path ./my_project

This produces:

my_project/
├── configurations/
│   └── baseline.yaml          ← ready-to-use baseline configuration
├── output/
│   └── .gitignore
└── reference_model/
    ├── envelope_structure.mcnp
    ├── envelope_structure.metadata
    └── filler_models/
        ├── universe_101.mcnp
        ├── universe_101.metadata
        └── ...

Tip

The migrate command does its best to identify universe boundaries automatically. Review the generated envelope_structure.mcnp and filler models to confirm they look correct before committing.

After migration, verify the round-trip by running a build:

gitronics build my_project/configurations/baseline.yaml --output-path my_project/output