March 2026 (2026-03) monthly summary for cryspen/libcrux. Focus was on performance, maintainability, and reliability. Delivered two features: (1) SHA3 Performance and Maintainability Improvements via refactoring to optimize function calls and improve code structure (commit 3c5588c30371cae9eb511b5148779bf6edb211e2) and (2) Documentation Reliability Enhancement: Local Asset Badges by switching README assets to local paths (commit 41c6167fcab6439c6e0eb292076eef122922956c). No critical bugs reported this month; codebase stability and testability improved. Business impact includes faster hashing operations, clearer, more maintainable code, and reduced external dependencies for docs.

January 2026 monthly summary for cryspen development. Key features delivered: - cryspen/hax: Docs.rs Documentation Configuration - Added configuration settings for generating documentation on docs.rs, enabling automated, discoverable docs generation and easier onboarding for external users. Commit bf59b5d3aec1633088c964166c2e99c60df57638 ("set cfg for docs.rs"). - cryspen/libcrux: AES-GCM hardware acceleration interface extraction and SIMD optimization enablement - Introduced hardware-accelerated AES-GCM interfaces, adjusted key expansion to support hardware paths, and enabled SIMD optimizations via Cargo.toml to improve performance on supported architectures. Commit 7dcc911add631ff3acba1266120366dec4d2e2fa ("aesgcm: allow hax extraction"). A Python script for platform interface extraction was added to support cross-platform builds. Major bugs fixed: - No major bugs fixed reported this month; primary focus was feature delivery and performance enhancements. Overall impact and accomplishments: - Enhanced documentation accessibility and maintainability through docs.rs integration, reducing onboarding time for external developers and users. - Improved cryptographic performance on supported hardware via AES-GCM hardware acceleration interfaces and SIMD optimizations, potentially lowering encryption/decryption latency and increasing throughput. - Strengthened cross-platform build tooling with a Python platform interface extraction script, enabling smoother CI/CD integration and broader platform support. Technologies/skills demonstrated: - Rust, cryptography (AES-GCM), hardware acceleration concepts, SIMD optimizations, Cargo.toml configuration, Python scripting for tooling, docs.rs integration, and cross-platform build support.

December 2025 monthly summary focusing on automated workflow improvements, cryptographic test coverage, and data accuracy fixes across two repositories. Delivered features and improvements align with business value: streamlined developer workflow, robust cryptographic validation, and accurate content metadata.

November 2025 — Focused delivery in two repos to drive platform reach, test reliability, and clearer documentation visuals. Key outcomes include expanded Linux/ARM64 support, stabilized test infrastructure for AES-GCM, and refreshed author visuals in project docs.

2025-10 Monthly Review: Strengthened cryptographic testing, advanced Libcrux/ML-KEM integration, and implemented compatibility fixes to improve reliability, security posture, and developer efficiency. Delivered concrete tests, improved test harness clarity, and repository hygiene to support reproducibility and faster downstream adoption.

September 2025 was focused on delivering business-critical features and hardening the CI pipeline for cryspen/libcrux. Key work included migrating PSQ from a legacy API to v1 with lint remediation, optimizing the MLKEM CI workflow, and stabilizing cross-architecture builds. The month also expanded testing and correctness coverage (AES fuzz tests, non-inline SHA3 API, and MLKEM C tests) while laying groundwork for no_std and broader code quality improvements through cleanup and refactoring. These efforts reduced pipeline runtimes, improved build reliability on x64/aarch64, and increased production readiness of cryptographic modules.

Monthly summary for 2025-08 spanning cryspen/libcrux and cryspen/hax. Delivered security-oriented ecosystem work and codebase hygiene that improve security posture, build stability, and maintainability, with clear documentation improvements.

July 2025 monthly summary for Cryspen development across cryspen/libcrux and cryspen/hax. Delivered security-focused enhancements, API improvements, and documentation refinements. Key outcomes include AES-GCM enhancements with AES-256 support, a new Builder-pattern query protocol API for libcrux-psq, and improved Readme documentation for easier onboarding. Also fixed a documentation typo in properties.md to accurately reflect the Z3 SMT solver's role. These efforts strengthen security posture, API usability, and developer productivity, while improving maintainability and cross-repo collaboration.

Concise monthly summary for 2025-06 focusing on key accomplishments, business value, and technical achievements.

May 2025 monthly summary for cryspen/libcrux and cryspen/hax focusing on delivery, reliability, and performance. Key features delivered and major improvements: - Libcrux version alignment and code-generation maintenance: aligned Libcrux version identifiers across ML-KEM/ML-DSA, regenerated code-generation artifacts, updated version hashes, and tidied C glue formatting to ensure consistent builds and dependency tracking. Commits include d00c946dea6cdc6486b3a571c1cbf1d2dad38df3; 85ad69b6d0ff7b69e1f46d212c3989f2b6693938; d46f2d21be79311c4a249b49554c5d2c35a73f71; 15b5ff6f56977a3c243f7fa56b3e9790913445ae; 320efd6d39f876e5bb7e50e76598228ba7079426. - SIMD backend correctness and cleanup: hardened SIMD representations and trait implementations across NEON and AVX2 backends; cleaned up related files and ignored proof artifacts to improve build cleanliness. Commits include 56c36b1a5cc871f49220691778bacfdb4807a977; e0b682db6eb68f0d75c7544f31a11b8cf60f870b; 7b89c457995ded31a578166182dee6d84c280947. - ML-DSA performance improvements: inline critical functions and optimize arithmetic paths (AVX2, compute_as1_plus_s2) to significantly speed up key generation and proofs. Commit: 731d55bfababfc35bfa15d84035b1315ae5540ab. - Build optimization: disable LTO on Linux release for ML-KEM C to reduce build times and avoid LTO-related issues. Commit: 15a8daa00c6278d22a1afdb78379baef4a06e32c. - Hax ownership metadata update: updated the owners metadata in Cargo.toml to reflect team/project structure; no functional code changes. Commit: 594e9381057cf39cdc4230719a9f2910bf421f0f. Overall impact and business value: - Increased build reliability and reproducibility across platforms with consistent versioning and code-generation artifacts. - Improved runtime performance for cryptographic workflows (faster key generation and proofs) and better SIMD correctness across NEON/AVX2, reducing risk of subtle algorithmic bugs. - Reduced release cycle friction through build optimizations (shorter builds) and clearer ownership, enabling faster onboarding and clearer accountability. - Strengthened code quality and maintainability through targeted cleanups, documentation-friendly changes, and debt reduction across the crypto stack. Technologies and skills demonstrated: - Rust and C glue integration, code generation workflows, and cross-language dependency alignment. - SIMD engineering (NEON and AVX2), Repr/trait correctness, and build cleanliness. - Performance optimization (inlining, arithmetic path improvements) and LTO-aware build strategies. - Project governance updates (team ownership metadata) and repository hygiene.

April 2025 monthly work summary for cryspen/libcrux focusing on delivering modern cryptographic capabilities, improving developer ergonomics, and strengthening build reliability and performance visibility. The team shipped XWing KEM Draft06 support, API usability improvements, CI/build cleanups, and a dedicated benchmarking framework with clearer ML-DSA performance reporting. These changes increase business value by enabling secure, modern KEM workflows, reducing integration friction, and providing measurable performance insights.

March 2025 performance summary for cryspen/libcrux: Delivered core MLKEM/MLDSA C code and glue updates, including EURYDICE CI handling improvements, with accompanying docs. Fixed critical crypto library issues (SHA3 on aarch64; ChaCha20-Poly1305). Modernized toolchain and dependencies (F*, OCaml), refreshed Docker/tooling, and strengthened CI pipelines with nightly proofs gating and a version bump to 0.0.2. Result: improved security, build reliability, and maintainability, enabling safer releases and faster iteration.

February 2025 performance summary across cryspen/libcrux and cryspen/hax. Focused on delivering cryptography feature readiness, build/reliability improvements, and user onboarding enhancements, while stabilizing external integrations and advancing core extraction tooling.

January 2025 monthly summary: Across cryspen/libcrux and cryspen/hax, the team delivered performance improvements, refactors, larger cryptographic capability gains, and improved developer workflows. The work emphasized business value: faster, more reliable code paths; more secure and future-proof crypto primitives; and streamlined release processes with better documentation and ownership governance.

December 2024 performance summary for cryspen/libcrux and cryspen/hax. This month focused on expanding extraction pipelines, improving portability and performance, and strengthening CI/test coverage. Key outcomes include (1) Shake256 XOF integration across the codebase enabling consistent hashing; (2) C and F* extraction features with initial and subsequent C extractions, tests adjustments, and glue behavior improvements; (3) MLDSA portability and performance enhancements, including AVX2 optimizations, self-test, and portable C code; (4) HAX/Eurydice reliability improvements, including portable extraction without Eurydice failures and iterator fixes; (5) CI and testing enhancements, including MLDSA CI bug fixes, new tests for ChachaPoly and RSA-PSS, YAML updates, and Windows CI adjustments. Cumulatively, these deliverables improve cross-target reliability, reduce build/test friction, and enable faster, more confident releases. Demonstrated technologies: C extraction workflows, F* extraction, Shake256 XOF, portable vectorization (AVX2/NEON), advanced CI pipelines, and performance optimizations (inlining, serialization).

November 2024 — Cross‑platform ML-KEM C enablement with CI refinements, ML-DSA enhancements, and repository governance improvements. Delivered broad OS support (s390x, Windows, big‑endian) with CI workflow updates and fuzzing integration, updated ML-KEM C core with inline NTT optimizations and default behavior to skip benchmarks, ML-DSA extraction/workflow improvements and performance optimizations, important fixups for HPKE/ML‑KEM integration and Windows glue, and strengthened repository hygiene and governance. Established build standardization and macro cfg refactor to enable the hax workspace feature across the project.