[lcsa-nax §4 harness] session=S3
[lcsa-nax §4 harness] correctness smoke (Phase 1.1 lesson)...
  smoke: rel_err=5.3654e-04  rmse=0.000001  NaN=0 Inf=0 -> PASS
[lcsa-nax §4 harness] initial cooldown 180.0s
  lcsa_small_seq4k                 d_actual=0.240 class=moderate  NAX=   2.56ms  SDPA=   2.53ms  ratio= 0.99×  drift= 0.5%
  lcsa_small_seq4k_sparse          d_actual=0.070 class=moderate  NAX=   2.61ms  SDPA=   2.64ms  ratio= 1.01×  drift= 5.9%
  lcsa_mid_seq8k                   d_actual=0.120 class=moderate  NAX=   6.54ms  SDPA=   6.50ms  ratio= 0.99×  drift= 0.4%
  lcsa_mid_seq8k_sparse            d_actual=0.030 class=boundary  NAX=   6.60ms  SDPA=   6.64ms  ratio= 1.01×  drift= 2.7%
  lcsa_large_seq16k                d_actual=0.120 class=moderate  NAX=  12.87ms  SDPA=  12.95ms  ratio= 1.01×  drift= 0.8%
  lcsa_large_seq16k_sparse         d_actual=0.030 class=boundary  NAX=  12.86ms  SDPA=  12.81ms  ratio= 1.00×  drift= 0.7%
  lcsa_mid_seq8k_very_sparse       d_actual=0.010 class=niche     NAX=   2.82ms  SDPA=   6.46ms  ratio= 2.29×  drift= 2.8%

[lcsa-nax §4 harness] session 'S3' → docs/lcsa-nax/lcsa-nax-rebench-data.json
