December 2024 monthly summary for cloudflare/cloudflared. Built build system modernization by setting Bookworm as the default Debian flavor, introducing Trixie as an alias to Bullseye to stabilize build dependencies, and removing Buster. This work is captured in commit dfbccd917ca38933ed93012909fd544b8b1be006 with message 'TUN-8781: Add Trixie, drop Buster. Default to Bookworm'. No major bugs fixed this month; the priority was upgrading and maintaining the build configuration. Impact: improved build reproducibility, alignment with current Debian releases, and reduced maintenance overhead by standardizing flavors. Business value includes smoother CI, fewer environment drift issues, and clearer upgrade paths for future Debian transitions. Technologies/skills demonstrated: build-system configuration, Debian packaging and flavor management, dependency stabilization, aliasing strategies, version control discipline, and release engineering.