release: prepare 0.40.1 (hotfix: #968) - #970
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Bump VERSION_NAME 0.40.0 -> 0.40.1 and update all version-carrying docs for a hotfix release scoped to the single functional delta since the 0.40.0 tag: #969 (fixes #968). - CHANGELOG: new [0.40.1] - 2026-08-12 entry under [Unreleased], headline framing this as a correctness hotfix (silently wrong output, not a crash); ### Fixed covers DefaultCpuOps.transpose() doing a shape-only relabel instead of a real block-grid byte permutation for packed quantized formats (Q4_0/Q5_0/Q5_1/Q8_0/Q4_K/Q5_K/Q6_K) whenever blocksPerInputDim>1, across scalar, Panama-vector, and native kernel tiers; misaligned input now throws instead of silently truncating; credits the ground-truth regression test approach. - README: BOM snippet -> 0.40.1, What's New in 0.40.1 (correctness fix, recommend upgrading), 0.40.0 demoted to "Previously", Contributors (0.40.1). - docs/antora.yml: skainet_version attribute 0.40.0 -> 0.40.1. - kernel-support-matrix.adoc: regenerated via generateKernelMatrix on this base — no kernel/tier changes, version stamp only -> 0.40.1. Branch prep only — no tag created. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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aharakal
approved these changes
Aug 12, 2026
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Release preparation for 0.40.1. Version bump + all version-carrying docs; no functional code changes in this branch itself — the fix already shipped to
developin #969.Headline
Correctness hotfix — silently wrong output, not a crash. This is a hotfix-only release: exactly one functional change since the
0.40.0tag, #969 (fixes #968).DefaultCpuOps.transpose()for packed quantized weights (Q4_0/Q5_0/Q5_1/Q8_0/Q4_K/Q5_K/Q6_K) performed a shape-only relabel instead of a real block-grid byte permutation whenever a row spanned more than one quant block (blocksPerInputDim > 1— true of virtually every real model).ops.matmul(x, ops.transpose(W))fed the packed-quant kernels bytes in the wrong order across all three kernel tiers — scalar, Panama-vector, and native (FFM/JNI) — silently producing wrong numbers, sometimes all-zero output, with no exception raised. Caught by a new ground-truth regression test that dequants each format's canonical vs. kernel-native byte layouts independently and checks both matmul paths against it.No new features, no API changes. Recommended upgrade priority: high — this is a silent-data-corruption class of bug, not a crash, so it can go unnoticed in production until model output is scrutinized.
What's in this branch
The full
0.40.0..developdelta going into this release: only #969 (fixes #968) — nothing else has merged since0.40.0.gradle.propertiesVERSION_NAME0.40.0 → 0.40.1 (single source of truth; BOM re-exports it)CHANGELOG.md[0.40.1] - 2026-08-12added under[Unreleased], headline +### Fixedcovering the bug across all 3 tiers / 7 packed formats, closes #968README.mddocs/antora.ymlskainet_versionattribute → 0.40.1 (used in docs dependency snippets)docs/…/kernel-support-matrix.adocgenerateKernelMatrix) — no kernel/tier changes (no new kernels, no tier promotions), version stamp only → 0.40.1Notes
./gradlew helpand./gradlew generateKernelMatrixboth green on this branch.develop; retarget/tag per the maintainers' release flow.🤖 Generated with Claude Code