Worked on improving the stability of API documentation for the mittwald/developer-portal repository by addressing issues related to DNS TTL changes. Focused on preventing breaking changes in the documentation by implementing DNS TTL adjustments, which allowed for smoother transitions and reduced user confusion. Updated the API change notes in Markdown to clearly communicate the new non-breaking TTL behavior, helping to minimize support queries. Emphasized maintainability and traceability by maintaining clear, signed-off commits and adhering to best practices in version control. Utilized skills in API documentation, technical writing, and version control to ensure the documentation remained reliable and user-friendly.