Peter Marshall focused on improving documentation quality and reliability for the apache/druid repository over a two-month period. He addressed two documentation bugs by correcting an incorrect DimensionsSpec link in Partitioning.md and restoring the GROUP BY metrics table header in metrics.md, both using Markdown and Git-based workflows. His changes ensured users could navigate to the correct configuration sections and view accurate metric information, reducing confusion and support inquiries. Peter’s work demonstrated attention to detail and a methodical approach, with each fix scoped to minimize risk and maintain clear traceability, ultimately enhancing the clarity and usability of the project’s documentation.