A RuboCop extension focused on enforcing committee.

Fast JSON Schema validator for Ruby.

化学式を解剖し、分子の量を秤り、反応式を釣合はすRubyGemに候

A slim file to minify embedded code.

A cli that highlights gems you can likely remove from a Ruby project's Gemfile.

RSpec coverage intent metadata, strict coverage checks, and traceability suggestions.

Detect, record, and classify flaky RSpec failures with normalized signatures, isolated reruns, and CI-friendly reports.

Evidence-based test suite adequacy analysis for Ruby, combining coverage, mutation testing, checked coverage, redundancy detection, and test-smell heuristics.

Japanese seasonal and lunisolar calendar calculations in Ruby: 24 solar terms, 72 microseasons, observances, new moons, and date conversion.

Ruby FFI bindings for FreeType 2.11+, with SDF atlases and HarfBuzz text meshes.

Idiomatic, memory-safe Ruby bindings for Box2D v3

Building audio-reactive visuals with a Ruby DSL.

Generated Ruby bindings for Dear ImGui with an idiomatic API, exception-safe DSL, GLFW/SDL3/OpenGL/WebGPU backends, and ImPlot.

Pure Ruby JPEG XL decoder and lossless Modular encoder with no native extensions.

OpenTelemetry browser and SSR adapters for Funicular, with OTLP and W3C Trace Context support.

Fast Prism-native AST traversal, declarative matching, and source rewriting for Ruby

Generate beautiful terminal screenshots from YAML.

Check GraphQL-Ruby resolver contracts against Prism-parsed Ruby source before runtime.

Report and block unintended syscalls in Ruby builds and tests

Hybrid dead-code detection for Ruby projects.

書籍『ゼロから作る正規表現エンジン』の章別リファレンス実装

OTP-style supervision trees for Ruby Ractors with declarative restart strategies and graceful shutdown.

A tiny Ruby library for generating finite state machine (automaton) diagrams as SVG.

A collection of railroad diagrams (syntax diagrams) for various programming languages to serve as a visual reference for developers.

Ruby desktop packet capture and inspection with protocol details, byte views, and display filters

Detect ignored ActiveRecord rollbacks in joined nested transactions

Catch Active Record objects whose database writes rolled back while their in-memory state stayed changed.

A three.js-like scene graph and WebGPU renderer for Ruby, with PBR, glTF, animation, shadows, and offscreen rendering.

A differentiable 3D Gaussian splatting renderer and trainer for Ruby, with Numo::NArray and optional OpenMP acceleration.

Read, validate, and exchange IODEF incident reports as JSON, CBOR, and XML in Ruby.

Read, validate, and convert JSContact 1.0 and 2.0 contact cards in Ruby.

Read, validate, and write RFC 7951 YANG JSON with typed Ruby values and metadata.

A custom cop collection of working toolkits.

A terminal slide rule simulator for Ruby, with interactive sandbox, demo, and drill modes.

RuboCop runner for Ruby code embedded in Slim.

Decode PicoRuby/R2P2 Cortex-M HardFault logs with matching ELF debug symbols

WebXR Device API bindings for Ruby. Build VR/AR applications in Ruby using ruby.wasm.

Causal profiling toolkit for Ruby that estimates which lines or waits would actually improve throughput or latency.

Research-backed safe regression test selection and fast test feedback for Ruby.

Generate Mermaid diagrams from Rails models and controllers.

Texture-oriented image decoding, conversion, resizing, and GPU upload helpers for Ruby.

Ruby FFI bindings for robust Clipper2 polygon clipping, offsets, and GPU-ready triangulation.

Ruby bindings for the Assimp 5.x asset import library

Ruby bindings for HarfBuzz text shaping engine

Pure Ruby interface to Linux Pressure Stall Information (PSI)

A practical Perl 5 interpreter written in pure Ruby

Share FactoryBot data safely across RSpec examples

Ruby-native lexer generator for parser authors. Write ordinary Ruby specs, run them at runtime, or generate deterministic Ruby for deployment.

Auto-fix N+1 queries detected by Bullet at runtime.

Ruby bindings for Linux's file-descriptor-based mount API

A small Mackerel metrics client for PicoRuby that validates service or host metric batches before a single verified HTTPS POST.

Deterministic syscall fault injection for Ruby programs using Linux seccomp user notifications.

Simple YAML Frontmatter Parser

Language Server Protocol (LSP) implementation for Lrama Style BNF grammar files (.y files).

A pure Ruby audio processing gem focused on ergonomic APIs and immutable audio transforms.

Ruby JSON processor with a practical jq 1.7.1-compatible subset, CLI, and Ruby API.

Bounded, browser-local profiler for Funicular and PicoRuby development tooling.

Detect PostgreSQL and MySQL session-state leaks in Active Record connection pools.

Pure Ruby library and CLI for reading, composing, editing, and writing OpenUSD USDA and USDZ assets.

A Pure Ruby Markdown linter and formatter.

Observe file, network, and process capabilities used while installing or requiring Ruby gems.

Convert vCard 4.0 and iCalendar to and from jCard and jCal in Ruby.

Issue, present, and verify selective disclosure JWTs with key binding in Ruby.

A RuboCop Extension Template.

象算木之法，以字畫示整數加減之程

A hobby regex engine written in Ruby. Designed to be simple and efficient for educational purposes.

A RuboCop extension focused on enforcing RSpec. A place where no one is officially employed, but where useful cops can gather.

Rdeck is a Ruby CLI tool that converts Markdown presentations to Google Slides, enabling continuous deck creation with content and design separation.

Runtime risky-test detection for RSpec: reports tests with no expectations or unexpected output.

Detect RSpec examples that leak global state, resources, time travel, randomness, or filesystem changes.

Dependency-free Ruby library for loading and writing glTF 2.0 and GLB with GPU-ready packed accessors.

A fast, Prism-native Ruby linter

Ruby bindings for RenderDoc's in-application API, with programmatic GPU frame capture and RSpec integration.

Ruby bindings for Jolt Physics, powered by joltc, FFI, and larb

Frame-level Ruby bindings for FFmpeg video and audio encoding/decoding without subprocesses.

Strict JSON5 1.0.0 parser in Pure Ruby with generated grammar, diagnostics, limits, and lossless Document mode.

Pure Ruby bindings for Linux seccomp user notifications

A Prism-based codemod for safely migrating deprecated graphql-ruby APIs without booting the application.

A linter and formatter for Lrama-style BNF grammar files.

Capture legacy Ruby behavior, synthesize portable specifications, and verify replacement implementations with replay and bounded formal checks.

Native CRuby bindings for libseccomp with low-level and Ruby-friendly APIs.

Ruby bindings for Linux fanotify

Ruby bindings for WebGPU via wgpu-native.

A modern, dependency-free Ruby client for the Notion API

Ruby bindings for the Skia 2D graphics library.

Pure Ruby LR parser generator with racc-compatible grammars, EBNF extensions, diagnostics, and SLR/LALR/LR(1) backends.

A visual editor for Lrama grammar files (.y files) powered by Ruby Wasm.

Railroad syntax diagrams in SVG and text, built with Ruby.

Catch Active Record transactions napping—detect non-database idle gaps while locks may be held.

Battery-included monitoring and alerting for Sidekiq

Ruby CLI and API for counting public GitHub PRs, commits, issues, and reviews by date range.

Capture, inspect, and save network packets in pure Ruby.

Read and write DNS wire messages and RFC 8427 JSON in Ruby, including malformed packets.

Read, validate, and expand JSCalendar events and tasks in Ruby.

Read, validate, and resolve SenML sensor measurements in JSON and CBOR with Ruby.