April 2026 monthly summary for mathworks/arrow: Focused on delivering a major enhancement to the OSFile API by adding support for low-level Python raw file descriptors, enabling pa.OSFile to accept both string paths and integer fds. This unlocks direct fd access, aligns with os.open workflows, and reduces integration complexity for Python users. The work included end-to-end tests to verify functionality and maintain API stability. No major bugs reported in this period for this repo; emphasis was on feature delivery. Impact: broader API flexibility, improved interoperability with Python's fd-based I/O, and better developer experience. Technologies demonstrated: Python/C++ bindings, OS-level I/O concepts, end-to-end testing, and PR-driven development.