During January 2026, this developer enhanced the eclipse-simrel/simrel.build repository by upgrading the CDT to version 12.4 and the CDT LSP to 3.5, focusing on improving the development environment for future releases. The work centered on version management and contributor workflow, ensuring that new editor capabilities and improved IDE experiences were available to users. Utilizing Eclipse CDT, LSP, and XML, the developer aligned these tooling upgrades with the 2026-03 M1 milestone, supporting smoother code navigation and better tooling integration. No bugs were addressed during this period, with efforts concentrated on delivering a single, targeted feature enhancement.