spec(ship-two-models): v2.87.0 — §42 hub build chain repair + hf_pipeline distill falsifier-parity#1437
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…line distill falsifier-parity Canonical record of today's MODEL-2-side hygiene cycle (PRs #1432-#1436). Pre-cycle: --features hub unbuildable (E0425 in quantize_to_gguf_bytes), masking 11 pre-existing test failures. Chain landed: - #1432: bind match result; build works → 7975/7986 (11 pre-existing surfaced) - #1433: empty-input early-return → 7977/7986 (3 contract-drift fixed) - #1434: GGUF alignment-padding skip in 2 test helpers → 7986/7986 ✅ - #1435: WGPU_FALLBACK_LOG_PREFIX + 3 drift-prevention tests (matches v1.2.0) - #1436: 4 hf_pipeline distill falsifier-parity tests → 7990/7990 §42 documents: what landed (table), net hub health progression, why for MODEL-2 (parallel-impl drift-protection), Five Whys (build masked pre-existing failures), coverage update (15+33 unchanged; parallel-impl uplift), ship % effects (MODEL-1 87→88, MODEL-2 50→54), and next-session pickup options (CPU-GPU-005 part b OR distill-train precompute determinism). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
Canonical record of today's MODEL-2-side hygiene cycle. Spec v2.86.0 → v2.87.0 documents the 5-PR chain (#1432-#1436) that took
--features hubfrom build-error → 7990/7990 pass while adding falsifier-coverage parity between the canonical and parallel distillation impls.What §42 records
let result = matchbind fix--features hubbuild (E0425)contract_pre_quantize!panicsWGPU_FALLBACK_LOG_PREFIX+ 3 drift-prevention testsdistill::lossNet effects
--features hubhealth: build-error → 7990/7990 pass / 16 ignoredapr distill --stage trainreal-training implementation remain open per §40 + §35.Five Whys (in §42.4)
;discardedmatchtuple;resultwas unbound.--features hubis opt-in; no workflow exercises it.find_data_section_startbut missed an inline clone inpipeline.rs. Follow-up: collapse to shared helper.Next-session pickup (§42.7)
Two bounded levers, operator picks:
Test plan
pv validate contracts/apr-cpu-vs-gpu-output-parity-v1.yamlexit 0pv validate contracts/apr-cli-distill-train-v1.yamlexit 0cargo test -p apr-cli --test cli_commandspass🤖 Generated with Claude Code