Worked on enhancing the cpprefjp/site repository by improving the documentation for the strtol function reference. Focused on aligning the documentation with the original Qiita article title and removing author attribution to ensure the reference accurately mirrored the linked content. This update, implemented using Markdown and leveraging strong documentation skills, aimed to improve the accuracy and consistency of external references within the C standard library documentation. By reducing potential confusion for developers and minimizing support overhead, the work contributed to making the documentation a more reliable resource. The contribution consisted of a single, targeted feature update over the course of one month.