Inline RBS annotations and semantic value types for Racc-generated Ruby parsers.

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

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

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

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

A Pure Ruby Markdown linter and formatter.

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

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

Detect ignored ActiveRecord rollbacks in joined nested transactions

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

Ruby bindings for Linux fanotify

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

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

Simple YAML Frontmatter Parser

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

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

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

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

Share FactoryBot data safely across RSpec examples

A practical Perl 5 interpreter written in pure Ruby

Pure Ruby interface to Linux Pressure Stall Information (PSI)

Ruby bindings for HarfBuzz text shaping engine

Ruby bindings for the Assimp 5.x asset import library

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

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

Generate Mermaid diagrams from Rails models and controllers.

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

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

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

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

RuboCop runner for Ruby code embedded in Slim.

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

A custom cop collection of working toolkits.

A Ruby on Rails app for collecting conference session feedback via QR codes and sharing moderated feedback with speakers.

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

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

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

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

Generate packet headers, bit fields, and register maps from YAML, JSON, or Ruby as ASCII, Unicode, SVG, PNG, and JPEG.

Read-only Ruby CLI for recovering files from Raspberry Pi Pico flash dumps, with FAT12/16/32 and UF2 support.

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

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

Battery-included monitoring and alerting for Sidekiq

Report and block unintended syscalls in Ruby builds and tests

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

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

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

Hybrid dead-code detection for Ruby projects.

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

Generate beautiful terminal screenshots from YAML.

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

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

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

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

Building audio-reactive visuals with a Ruby DSL.

Idiomatic, memory-safe Ruby bindings for Box2D v3

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

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

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

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

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

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

A slim file to minify embedded code.

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

Fast JSON Schema validator for Ruby.

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

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

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

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

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

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

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

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

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

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

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

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

Ruby bindings for the Skia 2D graphics library.

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

Ruby bindings for WebGPU via wgpu-native.

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

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

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

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

Pure Ruby bindings for Linux seccomp user notifications

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

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

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

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

A fast, Prism-native Ruby linter

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

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

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

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

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

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

象算木之法，以字畫示整數加減之程

A RuboCop Extension Template.