Public reproducibility package associated with the manuscript “Compressed manifold navigation for quantum many-body simulation in exponentially large Hilbert spaces”. This record contains source data, validation logs, publication figures, example input/output files, and a black-box executable of the DPISO–LICP framework. The package is intended to enable independent verification and reproduction of the numerical results reported in the associated manuscript without public release of the proprietary core source code. DPISO–LICP denotes a classical determinant-space propagation, information-guided selection, and structured optimization framework for identifying compressed, physically accessible electronic manifolds in exponentially large Hilbert spaces. DPISO replaces the earlier DTQW terminology to avoid implying a literal discrete-time quantum-walk simulation; the numerical results and benchmark conclusions are unchanged. The proprietary source code for the internal LICP scoring, DPISO frontier-navigation, and optimization routines is not included in this public deposit because these components are the subject of pending intellectual-property filings. The included black-box executable is provided for research verification and reproducibility purposes. Source-level inspection may be provided to journal editors and peer reviewers under confidential review conditions and appropriate intellectual-property protection arrangements. This package is provided for academic research verification and reproducibility purposes.