Margin round: jazz/blues fence, the interlock feature, exemptions empty

Item 1 — the last negative column in the matrix (jazz -1, blues scoring 100 AS jazz) was a miscalibrated jazz row: measured over 8 seeds, jazz renders a strong comping snare (.67-.89) on a SPARSE ride (.51-.64) while blues is kick-forward shuffle with a quiet snare on a fuller kit

• Item 2 — interlock: the verifier can finally see Fela's arithmetic. Per 8-beat window: (fraction of kick onsets OFF the four-on-floor quarters) x (fraction of 16th slots covered by exactly one lane).

• Item 3 — the four remaining floored seeds (chinawave s5, newage s1, prelude s2/s3) stay floored, documented at the solver: a shorter- progression swap would land them but trades the long-figuration identity…

Verified: verify.sh --full --no-cache PASS: matrix 63/63, NO negative columns remain; validate 5-seed; engine full-length.

▶ Play it: Polyrhythm Senate → Barometric Stampede → Harvest Quota Anthem — the three genres this change names, as one path https://stellate.app/?genre=afrobeat&seed=5219&path=1237.17819,1718.20526,2097.8214&xdur=0.061

984138d https://github.com/aboard-io/stellate/commit/984138d32e3648ddecfeb38fd1f80664bb76da4a