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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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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. WalkthroughThe changelog and SDK feature matrix describe hardware-detection behaviour and proposed Rust and TypeScript accessors. They record accessor review status and state that the cited published artifacts do not expose either accessor. ChangesHardware-detection documentation
Priority: ⬇️ Low Estimated code review effort: 1 (Trivial) | ~4 minutes Change: Other Merge Risk: ⚪ Minimal · up to The SDK status and published-artifact descriptions are accurate. No actionable documentation risk remains, so the PR is ready to merge after normal checks. Architecture SummaryArchitecture risk: 🔵 Low · up to The change affects 2 systems. Changed systems: Architecture concerns Review detailsSystems and components
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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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…B-523) cachekit-ts#132 merged to main on 2026-09-25, so the TypeScript cell, footnote 6 and the CHANGELOG entry no longer describe it as in review or "not on main". npm still ships 0.1.5, which has no accessor, so the cell moves to unreleased rather than to a version floor. cachekit-rs#80 is still open, so the Rust cell stays in review. Published artifacts were re-checked on 2026-09-27: crates.io cachekit-rs 0.7.0, cachekit-core 0.6.0, npm 0.1.5.
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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.
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