Implement, build, verify, or flash a complete embedded application on top of an STM32CubeMX-generated framework by using the generated requirement document, software design document, CubeMX setup guide, and project skeleton. Use when Codex needs to work in a CubeMX project, including CMake/Ninja projects with `CMakePresets.json`, `cmake/gcc-arm-none-eabi.cmake`, OpenOCD flashing, adding `Common`, `app` or `APP`, `Module`, `Board`, and `Config` implementation code without breaking CubeMX-generated directory structure, parallelizing unrelated module-driver work with subagents, and keeping business logic and HMI code in the main agent for user-facing clarification.
