COOLJAPAN

COOLJAPAN Blog

The inside story of building the largest pure-Rust sovereignty stack

219 posts

release 218 pure-rust 174 scirs2 71 rust 54 machine-learning 25 scientific-computing 23 wasm 21 simd 21 numpy 21 oxiarc 19 llm 16 noffi 15 formal-verification 15 cuda 15 cooljapan 15 ai 15
Jan 19, 2026 · 7 min

Kaccy 0.1.0 Released — Tokenize Your Expertise on Bitcoin, Where Reputation Equals Currency

Kaccy 0.1.0 is here — a Bitcoin-native Personal Token Platform for professionals. ~206k lines of safe Rust, 3,296 tests, 7 bonding curves, a 0-1000 reputation system, Lightning, PSBT, and threshold crypto. Proof of Output, not speculation.

releasekaccybitcoin
Jan 19, 2026 · 6 min

Kizzasi 0.1.0 Released — A Rust-Native Signal Predictor for the Continuous World

Kizzasi 0.1.0 is the first release of an Autoregressive General-Purpose Signal Predictor (AGSP) in Pure Rust — neuro-symbolic prediction for audio, sensors, robotics, and video that fuses State Space Models (Mamba/RWKV/S4) with TensorLogic constraints.

releasekizzasisignal-prediction
Jan 19, 2026 · 8 min

OxiFY 0.1.0 Released — Type-Safe LLM Workflow Orchestration as Pure Rust DAGs

OxiFY 0.1.0 is a Pure Rust, Dify-class LLM workflow orchestration platform: compose AI applications as type-safe directed acyclic graphs. 13 specialized crates, 15+ node types, in-process vector search, CeleRS-backed distribution, 2520+ tests. No Python, no Node.

releaseoxifyllm
Jan 18, 2026 · 8 min

MielinOS 0.1.0-rc.1 — A Preview of a Microkernel OS for Distributed AI Agents

MielinOS 0.1.0-rc.1 Oligodendrocyte is the first release candidate of a pure-Rust microkernel operating system for distributed AI agents: a Kademlia DHT mesh over QUIC, SWIM-style gossip, live agent migration, WebAssembly sandboxing, and SIMD tensor ops. 155,178 lines of Rust, 3,255 passing tests, zero clippy warnings.

release-candidatemielinrust
Jan 17, 2026 · 6 min

Legalis-RS 0.1.2 Released — SMT Verification Goes Pure Rust with OxiZ

Legalis-RS 0.1.2 replaces the C++ Z3 backend in its legal verifier with OxiZ, the Pure-Rust SMT solver — rigorous proofs with no native toolchain. Plus a zero-warning build across 25 crates and 11,365 passing tests.

releaselegalislegal-tech
Jan 16, 2026 · 6 min

SciRS2 0.1.2 Released — The Last C Dependency Is Gone: Pure Rust FFT via OxiFFT

SciRS2 0.1.2 completes the Pure Rust journey — FFT migrates from FFTW to Pure Rust OxiFFT, plus zero-allocation SIMD ops and functional optimizers (SGD/Adam/RMSprop). 100% Pure Rust by default on OxiBLAS + OxiFFT. No C, no Fortran.

releasescirs2scientific-computing
Jan 15, 2026 · 3 min

OxiFFT 0.1.1 Released — Dependency Refresh and a Spotless Clippy Run

OxiFFT 0.1.1 is a maintenance patch for the Pure Rust FFTW replacement: hashbrown and spin bumped to their latest, the MSRV pin dropped to track current Rust, and 48 clippy warnings eliminated for a zero-warning build at 652 passing tests.

releaseoxifftfft
Jan 12, 2026 · 5 min

OxiArc 0.1.0 Released — Pure Rust Archive and Compression, Built from Scratch

The first real release of OxiArc: pure Rust archive and compression with 9 crates, 8 compression algorithms, and 10 container formats — ZIP, TAR, GZIP, LZH, XZ, 7z, CAB, LZ4, Zstd, Bzip2 — all reimplemented from scratch. No C, no zlib, no libarchive. ~19,600 lines, 371 tests, Rust 1.85+ / Edition 2024.

releaseoxiarcarchive
Jan 12, 2026 · 6 min

OxiFFT 0.1.0 Released — The Pure Rust FFT That Replaces FFTW and RustFFT

OxiFFT 0.1.0 debuts — a 99% Rust port of FFTW3. Complex/real transforms, DCT/DST, multi-dimensional and batch FFTs, runtime-dispatched SIMD, and 20+ features beyond RustFFT (Sparse FFT, STFT, NUFFT, autodiff, GPU, MPI, WASM). The spectral backbone for the SciRS2 numerical stack.

releaseoxifftfft
Jan 12, 2026 · 6 min

OxiZ 0.1.0 Released — A Pure Rust SMT Solver, the First Step Toward Replacing Z3

OxiZ is a Pure Rust Satisfiability Modulo Theories solver reimplementing Z3 — a full CDCL(T) architecture with EUF/LRA/LIA/BV/Arrays/Strings/FP/Datatypes theories, SMT-LIB2 support, and roughly 90% Z3 feature parity, all with zero C/C++. This is its first public release.

releaseoxizsmt-solver
Jan 12, 2026 · 6 min

OxiZ 0.1.1 Released — A Unified `oxiz` Meta-Crate for the Pure Rust SMT Solver

OxiZ 0.1.1 ships a new unified `oxiz` meta-crate with feature-flagged modular usage (solver/nlsat/optimization/spacer/proof/full), plus MBQI and CDCL(T) theory-propagation fixes. A Pure Rust Z3 replacement with zero C/C++.

releaseoxizsmt-solver
Jan 10, 2026 · 5 min

Legalis-RS 0.1.1 Released — UK & Singapore Join, 9,568 Tests Passing

Legalis-RS 0.1.1 adds United Kingdom and Singapore jurisdictions to the Pure Rust legal-DX framework and grows the test suite from 6,100+ to 9,568 across 23 crates, with a near-zero-warning quality pass.

releaselegalislegal-tech
Jan 6, 2026 · 6 min

MeCrab 0.1.0 Released — A Pure Rust MeCab, Japanese Morphological Analysis Without the C Toolchain

MeCrab is a pure Rust morphological analyzer compatible with MeCab IPADIC dictionaries. The 0.1.0 debut brings memory-mapped zero-copy dictionary loading, a SIMD-accelerated Viterbi lattice, runtime word addition, and the KizaMe CLI — Japanese tokenization in a single safe binary.

releasemecrabrust
Jan 5, 2026 · 7 min

Legalis-RS 0.1.0 Released — Pure Rust Legal DX: Statutes as Verifiable Code

Legalis-RS is a Pure Rust framework that turns legal statutes into structured, machine-verifiable code — a Legal DSL parser, formal verifier, population simulator, and multi-jurisdiction support (JP/DE/FR/US). An honest first release.

releaselegalislegal-tech
Jan 4, 2026 · 8 min

rs3gw 0.1.0 Released — A Pure Rust, Drop-in S3-Compatible Object Storage Gateway

rs3gw is a Pure Rust, S3-compatible object storage gateway for AI/ML and HPC. The 0.1.0 debut ships a 100+ operation S3 API, multi-protocol REST/gRPC/GraphQL access, content-addressed deduplication, and a pushdown-capable S3 Select query engine — in a single 50MB static binary.

releasers3gws3
Dec 30, 2025 · 7 min

NumRS2 0.1.0 Released — The Pure-Rust NumPy Core of the COOLJAPAN Stack

NumRS2 0.1.0 is the first stable release of a NumPy-inspired numerical computing library for Rust: ~155k lines, 1,111+ tests, 86 AVX2 + 42 ARM NEON SIMD functions, pure-Rust linear algebra via OxiBLAS, and zero C/Fortran dependencies.

releasenumrs2numpy
Dec 30, 2025 · 2 min

NumRS2 0.1.1 Released — The Installable First-Stable Baseline

NumRS2 0.1.1 is a same-day point release that locks in our first stable as the installable baseline: `cargo add numrs2` now resolves to 0.1.1, with the same public API, zero warnings, and 1,111+ passing tests — a drop-in over 0.1.0.

releasenumrs2numpy
Dec 30, 2025 · 7 min

OptiRS 0.1.0 Released — The First Stable Pure Rust ML Optimizer Suite, Built Exclusively on SciRS2

OptiRS is the Pure Rust ML optimization layer for the COOLJAPAN stack — the torch.optim / optax replacement built exclusively on SciRS2-Core. The 0.1.0 first stable release ships 19 optimizers, SIMD acceleration (2-4x), parallel parameter groups (4-8x), 1,134 passing tests, and zero clippy warnings.

releaseoptirsml-optimization
Dec 30, 2025 · 4 min

OxiBLAS 0.1.2 Released — Complex LAPACK for ndarray

OxiBLAS 0.1.2 brings complex-aware LAPACK to ndarray: SVD and QR for complex matrices, Cholesky and eigendecomposition for Hermitian matrices, plus relaxed trait bounds so solve() works with Complex32/Complex64. Pure Rust BLAS/LAPACK, no C or Fortran.

releaseoxiblasblas
Dec 30, 2025 · 7 min

PandRS 0.1.0 Released — A Pure Rust DataFrame Library with Pandas-Class APIs, First Stable Release

PandRS 0.1.0, the first stable release — a 100% Pure Rust DataFrame library with 70+ pandas-compatible methods, SIMD vectorization, Rayon parallelism, and up to 89% memory reduction. 1334+ tests, 175,000+ lines of Rust. No C, no Cython, no GIL.

releasepandrsdataframe
Dec 30, 2025 · 4 min

SciRS2 0.1.1 Released — Stabilizing the Pure Rust SciPy Stack

SciRS2 0.1.1, a maintenance release one day after the first stable build — documentation refinements, dependency updates, build improvements and minor fixes on the 100% Pure Rust, OxiBLAS-backed SciPy/NumPy stack. No C, no Fortran.

releasescirs2scientific-computing
Dec 29, 2025 · 4 min

OxiBLAS 0.1.1 Released — Correct Eigenvectors for Tridiagonal QR

OxiBLAS 0.1.1 fixes a critical sign bug in the symmetric eigenvalue QR algorithm so eigenvectors accumulate correctly for matrices that need multiple QR sweeps. The pure Rust BLAS/LAPACK foundation now powering the just-launched SciRS2 core.

releaseoxiblasblas
Dec 29, 2025 · 5 min

SciRS2 0.1.0 Released — A Pure Rust SciPy/NumPy Foundation, First Stable Release

SciRS2 0.1.0, the first stable release — a 100% Pure Rust scientific computing & AI/ML stack with SciPy-compatible APIs, built on OxiBLAS, refactored into clean modules with zero warnings and 10,861 passing tests. No C, no Fortran.

releasescirs2scientific-computing
Dec 28, 2025 · 6 min

OxiBLAS 0.1.0 Released — Pure Rust BLAS/LAPACK, the Foundation for SciRS2

The first public release of OxiBLAS — a pure Rust implementation of BLAS and LAPACK. Full Level 1/2/3 BLAS, LU/Cholesky/QR/SVD/EVD, 9 sparse formats, f16/f128 precision, and DGEMM already matching OpenBLAS on large matrices. No C, no Fortran, no MKL.

releaseoxiblasblas