Worked on the RevealBi/Documentation repository to enhance iframe messaging compatibility by updating the message posting target from window.top to window.parent, ensuring messages are correctly delivered to the immediate parent frame in nested iframe scenarios. This change improved integration reliability for downstream applications and widget environments that rely on embedded contexts. The update was implemented using Markdown for documentation, with detailed usage guidelines provided in both English and Japanese. The work maintained clear traceability through a single, well-scoped commit, focusing on documentation skills and careful change management to support consistent behavior and easier review or rollback if necessary.