Jaap van Turnhout focused on stabilizing build and extension tooling for the php/frankenphp repository over a two-month period. He addressed critical bugs in build scripting and shell scripting, specifically refining the Composer-based build process to improve PHP extension detection for embedded applications. By removing ext-json from required extensions during composer check-platform-reqs, Jaap eliminated false errors and improved CI reliability. Additionally, he enhanced the robustness of extension management by correcting directory context handling in shell scripts, ensuring spc dump-extensions executed reliably across environments. His work demonstrated careful attention to deployment stability and developer experience, emphasizing correctness over feature delivery.