Worked on the Jij-Inc/ommx repository to deliver a feature focused on improving dependency management and test reliability. Updated the ommx-openjij-adapter to support OpenJij versions up to, but not including, 1.0.0 by introducing an upper-bound constraint in the TOML configuration, which streamlines future maintenance and ensures compatibility with newer releases. Enhanced the Python-based test suite to accommodate multiple optimal solutions from the solver, reducing test flakiness caused by solver nondeterminism. Emphasized reproducibility and auditability by implementing a version guard and providing clear commit messaging, reflecting a methodical approach to Python development, dependency management, and automated testing practices.