Build and verify changes in Project_DJ_Engine using the repository's checked-in preset matrix and CTest flows. Use when Codex needs to choose a repo-specific build target, run focused verification after code changes, reconfigure the repo-root `./build` directory through presets, or validate util/STFT/waveform work against `music_to_waveform_webp` and other PDJE targets.
2026-04-26