DIG Early Spectra Repro v1: Curated Reproducibility Resource for Early Dual Incidence Graph Experiments

DIG Early Spectra Repro v1 is a curated reproducibility resource for selected early Dual Incidence Graph (DIG) experiments associated with the first spectrum-forming observations reported in my early DIG papers. The package centers on a single runnable Jupyter notebook, DIG_Early_Spectra_Repro_v1.ipynb, with a minimal dependency file and archival legacy notebooks retained for provenance. The notebook includes core mask/kernel/projection machinery, a smoke test, a small curated set of manual experiments, a lightweight random-mask sweep, flattened CSV export, figure generation, PDF report export, and JSON export. This upload is intended as a runnable record of the original experimental objects and outputs, not as a complete archive of every exploratory development branch. The default execution path is intentionally compact and reproducible, while broader historical cases remain available in the experiment registry for optional use. This resource was assembled to provide a clean reproducibility object for the original observations reported in the early DIG papers. Those papers were somewhat widely downloaded, but I had not previously released runnable code for the underlying experiments. Later OGT/ICL work made it more useful to preserve those early experiments in executable form rather than leave them only as figures in papers.