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…w (LAB-523) The Hardware acceleration detection row said rs is core-internal and ts exposes nothing. Both are now being surfaced in open PRs; the published artifacts (crates.io 0.7.0, npm 0.1.5, checked 2026-09-22) are unchanged, so the cells move to 'in review' with the PR links, not to a checkmark, per decisions/matrix-version-verification.md. Footnote 6 rewritten to name the core accessor, its per-architecture behaviour, the informational-only contract, and the executed tests behind the wasm32/x86_64 claims.
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WalkthroughThe changelog and SDK feature matrix document hardware-acceleration detection across architectures. They mark the Rust and TypeScript accessors as in review and state that published artifacts do not yet expose them. ChangesHardware-detection documentation
Priority: ⬇️ Low Estimated code review effort: 1 (Trivial) | ~4 minutes Change: Other Merge Risk: 🔵 Low · up to The docs could mislead readers about which published SDK versions still report the aarch64 fallback and whether the core fix has shipped. This is a bounded documentation correction; overall merge risk is low. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Review of the SDK PRs found core's aarch64 branch returns cfg!(target_feature = "neon"), which every aarch64 target enables, so the flag is true on every aarch64 build regardless of the Crypto Extension. The footnote said 'compile-time target features on aarch64', which is technically what it is and practically misleading; it now says what a reader on a Cortex-A72 board needs to know and names the core follow-up.
…of NEON (LAB-4650) (#77) ## Problem `ZeroKnowledgeEncryptor::detect_hardware_acceleration()` on aarch64 without a compile-time `aes` target feature returned `cfg!(target_feature = "neon")`. NEON is a default target feature on every aarch64 target (`rustc --print cfg --target aarch64-unknown-linux-gnu`), so `hardware_acceleration_enabled()` was a compile-time constant `true` on every aarch64 build. Cortex-A72-class parts (Raspberry Pi 3/4) have NEON but no Crypto Extension: they reported "hardware accelerated" while `ring` ran software AES. The one platform class where the flag is useful for triage is the one where it answered wrong. ## Change - The aarch64 branch now uses `std::arch::is_aarch64_feature_detected!("aes")` (stable since Rust 1.60; MSRV is 1.85). The compile-time `#[cfg(target_feature = "aes")] → true` short-circuit is unchanged. - First unit test for the flag: `test_hardware_acceleration_matches_platform_probe` pins `hardware_acceleration_enabled()` to the platform's own runtime probe on x86/x86_64 and aarch64. Both `std::arch` probes fold to const `true` when `aes` is enabled at compile time, so the same assertion covers the short-circuit path (verified locally with `RUSTFLAGS="-C target-feature=+aes"`). - Docs: `OperationMetrics::hardware_accelerated` claimed acceleration "was used (for SHA, AES, etc.)"; it now says what the bool is (the CPU reports AES hardware; informational, the crypto backend dispatches on its own). The module doc names the Armv8 Crypto Extension alongside AES-NI. Crypto dispatch is unchanged; the flag stays informational. ## Verification - `cargo fmt --check`, `cargo clippy --all-features -- -D warnings`, `cargo test --all-features`, `cargo test --features ffi`, `cargo doc --all-features --no-deps`: green on x86_64. - The macOS arm64 CI lane compiles the short-circuit (`aes` is a default feature on `aarch64-apple-darwin`), not the new probe line. The probe expression was compiled for `aarch64-unknown-linux-gnu` with `rustc --emit=metadata` and passes clippy `-D warnings` there in a scratch crate; a bogus feature name fails to compile, so the feature string is checked at build time. ## Downstream cachekit-rs, cachekit-ts and the protocol matrix currently document the aarch64 behaviour as "`true` on every aarch64 build (NEON check)" dated to core 0.6 ([cachekit-rs#80](cachekit-io/cachekit-rs#80), [cachekit-ts#132](cachekit-io/cachekit-ts#132), [protocol#68](cachekit-io/protocol#68)). Those caveats can be retired once this ships in a core release. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit - **Bug Fixes** - Improved detection of AES hardware acceleration on Arm64 devices by checking the processor’s AES capability directly. - Hardware acceleration reporting now more accurately reflects platform support. - **Documentation** - Documented Armv8 Crypto Extension support alongside AES-NI. - Clarified that hardware acceleration status is informational and reflects available AES CPU support. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
Both conflicts were independent edits, resolved as unions with nothing dropped: - CHANGELOG.md: each side added an Unreleased section at the same anchor; keep both, this PR's first. - sdk-feature-matrix.md: adjacent-row edits; keep main's secure.wrap() enforcement row and this PR's hardware-acceleration detection row.
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In `@sdk-feature-matrix.md`:
- Line 93: Update the hardware-detection note around
`ZeroKnowledgeEncryptor::hardware_acceleration_enabled()` to scope the aarch64
NEON caveat to affected pre-fix core versions, including 0.4.0 and 0.6.0, rather
than only core 0.6. In `sdk-feature-matrix.md` and `CHANGELOG.md`, describe
LAB-4650 as merged but unreleased; do not imply a fixed core release exists.
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…ed core through 0.6.0 CodeRabbit-Resolved: sdk-feature-matrix.md:93:Update the hardware-detectio
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Overview
Documentation-only update to the SDK feature matrix and changelog recording in-review status for hardware-acceleration detection in the Rust and TypeScript SDKs (LAB-523).
Matrix changes (
sdk-feature-matrix.md)⚠️ core-internal, not re-exportedand TypeScript from❌ not exposedto🚧 in review, each naming the proposed accessor and the open PR, while explicitly restating what the published artifacts contain (crates.io 0.7.0 — core-internal probe only; npm 0.1.5 — nothing). Python (✅ surfaced) and Go (N/A) are unchanged.Last updatedadvanced from 2026-09-02 (LAB-687) to 2026-09-22, with the prior reconciliation entries retained as lineage.Footnote ⁶ rewrite
The footnote is substantially expanded beyond a status update and now documents previously unrecorded behaviour:
ZeroKnowledgeEncryptor::hardware_acceleration_enabled()and drops the stalecore.rs:243/encryption_wrapper.py:583line references.is_x86_feature_detected!("aes")on x86/x86_64,cfg!(target_feature = "neon")on aarch64, alwaysfalseon wasm32.trueregardless of Crypto Extension support (e.g. Cortex-A72-class hardware reportstruewhileringexecutes software AES). Scoped to every publishedcachekit-corethrough 0.6.0, with the fix (cachekit-core#77, LAB-4650) noted as merged to coremainbut unreleased.ring/aes-gcmselect implementations independently of it.nullreturn (unknown, notfalse) when the installed binding predates the accessor, and thatEncryptionManagerCore.isHardwareAccelerated()initialises on demand.encryption.protocol.workers.test.tsfor the wasm32 claim;encryption.rsunit tests for the x86_64 pin) for the prior mechanism-traced assertion.decisions/matrix-version-verification.md.Changelog
New Unreleased entry under
### Encryption — hardware-acceleration detection surfacing in rs/ts (LAB-523)mirroring the cell transitions, the referenced PRs (cachekit-rs#80, cachekit-ts#132), and the footnote rewrite rationale.Notes
No normative spec text or Overview table cells were touched; published-artifact claims are unchanged, so no version floors were added.