A Ruby library for text classification featuring Naive Bayes, LSI (Latent Semantic Indexing), Logistic Regression, and k-Nearest Neighbors classifiers. Includes TF-IDF vectorization, streaming/incremental training, pluggable persistence backends, thread safety, and a native C extension for fast LSI operations.

A ruby port of puppeteer

LocalBus is a lightweight yet powerful pub/sub system for Ruby applications that enables decoupled communication within a single process. It offers both non-blocking I/O and thread pool processing modes, robust error handling, and fine-grained concurrency controls. Perfect for organizing event-driven architectures, handling background jobs, and managing complex workflows without external dependencies."

Rigor is a CLI-first static analyzer for Ruby applications that prioritizes type inference, clean application code, and zero runtime dependencies. Rigor is a standalone tool, not a library: install it independently rather than adding it to your application's Gemfile. It runs on Ruby 4.0 while your project keeps its own Ruby, and it reads your project as data rather than loading it, so a Gemfile entry only constrains your application's Ruby and dependency resolution. Installation channels (mise, asdf, gem install, container, Nix): https://github.com/rigortype/rigor/blob/master/docs/install.md

rubocop extension to check RBS annotation comments

Fix race conditions on one record in Rails: ordered operations, expiring holds, and durable state in your existing SQL database. Solid Objects is a SQL-backed virtual actor library for Ruby on Rails. It brings the Cloudflare Durable Objects programming model to Rails: addressable objects with ordered mailboxes, fenced activation, per-object reminders, transactional effects, and reactive ERB. It runs on MySQL, PostgreSQL, and SQLite without Redis, and requires Ruby 3.3 or newer and Rails 7.1 or newer.

A lightweight concern that allows IP address restrictions on specific controller actions. Unlike Rack middleware solutions, this operates at the controller level for minimal overhead.

Serves Connect unary RPCs as ordinary Rails controller actions, so every call flows through the normal ActionController::API lifecycle and the Rails observability stack works with no extra wiring.

Standard Ruby typing configuration for projects

CLI Templating System and String Formatter

A Rails gem that provides Japanese address completion and validation based on Japan Post postal code CSV data. Supports address lookup by postal code, prefix search, and address/postal code consistency validation.

A lightweight Ruby gem that detects CPU quota from Linux cgroups (v1 and v2) and returns the appropriate number of processors for container environments. This is a Ruby equivalent of Go's uber-go/automaxprocs.

A new HTTP server framework for Ruby.

Declares an API problem on the exception class — its type, title and status — and renders any of them as application/problem+json, from a controller concern for the errors a controller raises and from an exceptions app for the ones that escape it.

Parses JSON request bodies into generated protobuf message classes, stores messages in json and jsonb columns, catalogues RFC 9457 problems in a protobuf enum, and binds Alba serializers to the messages they produce.

A RBS files generator for ActionMailer