During April 2025, Villastar developed and contributed a new Parity Bit System Exercise to the exercism/problem-specifications repository, focusing on parity-based error detection for intergalactic data transmission. The work involved designing a problem specification that enforces even parity across 8-bit data segments, with explicit logic for calculating and inserting parity bits in both complete and incomplete data blocks. Villastar demonstrated skills in algorithm description, edge-case handling, and disciplined Git workflows. The contribution expanded the repository’s coverage of data integrity concepts, providing learners with clear guidance on parity calculations and robust documentation, while adhering to standard review and continuous integration processes.