CORRECTION: ara-diac-small-2.0 = 5.08 (was 4.8218) - #189
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The published number does not reproduce: two independent later measurements of the shipped bytes (harness re-eval 5.0821; artifact- level runtime scoring of the sha-pinned release zip 5.0329) agree and disagree with 4.8218. Ledger correction entry with consequences (38% not 42% E4 reduction; PKM arm was better, not matched; frontier ordering unchanged). models.yaml corrected; Paper B frontier cell annotated. All other rows re-verified exactly by the same tooling.
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What
The artifact-level verification tool (modal_score_artifact) scored the
released ara-diac-small-2.0-fp32.zip — sha-verified equal to the index
pin — end-to-end through the runtime: 5.0329 full-set DER-CE. The
harness re-eval of the same checkpoint reads 5.0821. Both agree; the
published 4.8218 (2026-08-30) does not reproduce and is withdrawn.
Consequences (in the ledger entry)
between 2.0 and 2.1
Fixes in this PR
Predictions files for all five runs publish as frontier-predictions-v1
so every corrected number is re-derivable by anyone.