July 2026 performance summary for the DUNE software stack. Focused on stabilizing builds, enabling Spack-based workflows, and hardening test infrastructure across multiple repositories to improve reliability, portability, and business value. Key features delivered include cross-repo Spack MPD build compatibility, modernization of build configurations with standard CMake find_package usage, and enhanced test environment setup. Major bugs fixed include test-suite assertion warnings and compilation blockers in Spack MPD environments. The combined efforts reduced build fragility, improved CI reliability, and accelerated onboarding of external dependencies. Technologies demonstrated include CMake-based build automation, Spack integration, environment-variable management, and test infrastructure hardening.