Worked on the oasisprotocol/docs repository to deliver an updated documentation package for the Oasis Core 25.9 TESTNET release. Focused on technical writing and documentation, the work involved revising the testnet.md file to ensure all version references were consistent and aligned with the latest release notes. Using Markdown as the primary language, the developer standardized terminology throughout the documentation, which improved clarity and reduced potential onboarding issues for developers working with the TESTNET environment. No bug fixes were required during this period, as the primary contribution centered on maintaining documentation quality and supporting developer experience through precise, up-to-date information.