Source derivative known-answer controls
10/10 fixed controls passed.
Charged 26/26 bounds and 85/85 logical bound steps. Elapsed 4.02 seconds.
These generated controls compare rotations and source derivatives with independent rational and closed-form answers. They cover reference rounding, calibration rows, clipped clock slopes and a mean-value remainder with displaced numerical centers. They do not qualify training transfer, native propagation, full-recording widths or observational confidence.