Mikko Juusti enhanced the Tietokilta/web repository by expanding content editing capabilities in Payload CMS, specifically enabling support for H4 headings. He achieved this by modifying the CMS configuration using TypeScript, allowing authors and editors to structure content with an additional heading level. The change was delivered as a single, focused commit, ensuring clear traceability and simplifying future reviews or rollbacks. Mikko’s work addressed a targeted editorial need, improving workflow flexibility without introducing unnecessary complexity. Over the course of the month, he demonstrated proficiency in CMS configuration and TypeScript, delivering a precise feature update with a well-scoped technical approach.