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

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

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

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

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.

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

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

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

Battery-included monitoring and alerting for Sidekiq

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

A fast, Prism-native Ruby linter

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

Ruby bindings for the Assimp 5.x asset import library

Idiomatic, memory-safe Ruby bindings for Box2D v3

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

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

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

Hybrid dead-code detection for Ruby projects.

Pure Ruby bindings for Linux seccomp user notifications

A custom cop collection of working toolkits.

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

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

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

Ruby bindings for WebGPU via wgpu-native.

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.

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

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

Report and block unintended syscalls in Ruby builds and tests

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

Share FactoryBot data safely across RSpec examples

A practical Perl 5 interpreter written in pure Ruby

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

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

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

A Pure Ruby Markdown linter and formatter.

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

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

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

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.

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

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.

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

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

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

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.

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

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

A RuboCop extension focused on enforcing committee.

Generate Mermaid diagrams from Rails models and controllers.

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

Generate beautiful terminal screenshots from YAML.

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

A slim file to minify embedded code.

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

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

Ruby bindings for Linux fanotify

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

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

Pure Ruby interface to Linux Pressure Stall Information (PSI)

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

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

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

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

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

Detect ignored ActiveRecord rollbacks in joined nested transactions

Ruby bindings for HarfBuzz text shaping engine

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.

象算木之法，以字畫示整數加減之程

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

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

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

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.

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

Simple YAML Frontmatter Parser

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

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

A RuboCop Extension Template.

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

Ruby bindings for the Skia 2D graphics library.

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

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.