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docs(WO67): the diagnostic chain behind the 39.5 - #350

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Oct 23, 2026
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ronaldtse merged 1 commit into
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docs/wo67-diagnostic-chain

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Five verified findings: zero engine drift; 15-row test contamination (eval rebuild needed); clean v1 split; the expanded arms train on 24.5% of the test words and still lose; and the mechanism — corpus expansion shifted the output-length prior (volubilis 25.6 tokens avg vs test 10.4), wrecking short-word generation. v5 (length-filtered, 92.7k rows, BS4) is the corrective arm with a stated decision rule.

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ronaldtse merged commit f24d458 into main Oct 23, 2026
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ronaldtse deleted the docs/wo67-diagnostic-chain branch October 23, 2026 02:28
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