HY — H1: issue-triage quality vs baseline
H0₁: no model/strategy configuration beats the triage baseline F1-macro. H1₁: at least one configuration achieves a statistically significantly higher F1-macro (Wilcoxon two-sided, α=0.05, effect size r ≥ 0.1).
Result — H0₁ REJECTED. The canonical configuration (qwen2.5:3b, contextual-anchoring) reaches F1-macro = 0.5867 (N=200) versus a no-information majority-class floor, Wilcoxon p ≈ 6.9×10⁻¹³, r = −0.51 (large). Scope: this shows the model is far above chance (accuracy 0.25), not that it beats a competitive keyword heuristic (deferred — see technical debt).
Source: PUMA project documentation · Traceability: corpus units
MEM-017,MEM-046,PUMA-021· reconciliation verdict G-series · Confidence: verified-at-primary-source