Historical instrumentation is archived as evidence, not active project source. Baseline source is 121a154c9024dcce755d8b8ebbf39c1f7da92b33. Apply candidate-source.patch or snr-source.patch to that checkout; the latter additionally needs snr-noise-weighting.h copied to src/wave_dir/VesselRaoNoiseWeighting.h. Build O2 with the flags in each binary provenance file and an Eigen include path, then use the manifest configurations and pinned records with rao_parameter_tuning.py. Header overlays preserve the direction-only diagnostic variants. Path literals in archived scripts require relocation. The final-bin provenance identifies the shipping O3 objects, independently linked and verified byte-identical to make-produced simulators. Latest-source comparison uses SF_LOW_WAVE_RACC_MAX_SCALE=1 for the off arm and no overrides for selected.
