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

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

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.

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.

Pure Ruby interface to Linux Pressure Stall Information (PSI)

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

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

Ruby bindings for Linux fanotify

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

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

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.

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

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.

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

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

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

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

A RuboCop Extension Template.

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

Generate Mermaid diagrams from Rails models and controllers.

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

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

Building audio-reactive visuals with a Ruby DSL.

RuboCop runner for Ruby code embedded in Slim.

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

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

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.

A fast, Prism-native Ruby linter

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

Idiomatic, memory-safe Ruby bindings for Box2D v3

Ruby bindings for HarfBuzz text shaping engine

A practical Perl 5 interpreter written in pure Ruby

Share FactoryBot data safely across RSpec examples

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

Report and block unintended syscalls in Ruby builds and tests

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

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

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.

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.

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

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

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

Pure Ruby bindings for Linux seccomp user notifications

Hybrid dead-code detection for Ruby projects.

A RuboCop extension focused on enforcing committee.

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

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

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

Ruby bindings for WebGPU via wgpu-native.

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

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

A slim file to minify embedded code.

象算木之法，以字畫示整數加減之程

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.

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

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

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.

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.

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

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

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.

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.

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

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

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

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

Simple YAML Frontmatter Parser

A custom cop collection of working toolkits.

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

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

Generate beautiful terminal screenshots from YAML.

Ruby bindings for the Skia 2D graphics library.

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

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

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