📦 Ruby package system with Box-powered constant isolation

A YAML parser written in Ruby

A Unicode regular expression library written in Ruby

Kanban as it should be. Not as it has been.

A lightweight gem that provides IP address restrictions for Rails controllers at the action level.

Mutation testing for Ruby. AI writes your code. AI writes your tests. But who tests the tests?

SolidQueue systemd integration for Capistrano

minica is a small, simple CA intended for use in situations where the CA operator also operates each host where a certificate will be used.

A modern profiler for your Rails application

activemodel form object pattern. it embraces multiple AR models and provides a transparent interface as if they were a single model.

Enable a Rails application to have separate databases for each tenant.

tsumiki

Parallel test runner for rspec. Multi-process and multi-node.

Coding Agent Session Manager for Claude Code / Gemini CLI / Codex CLI / Cursor Agent / Copilot CLI / Cline CLI / OpenCode

Convert markdown to keynote

🚥 Traffic control for code.

Synchronize Capybara commands with application JavaScript and AJAX requests

deck is a tool for creating deck using Markdown and Google Slides.

Fast tests, clear datasets. Ditch nightmare fixtures and slow confusing factories.

🧪 Durable execution workflows for Active Job

Ruby gems for general-purpose AI agent systems: automation, research, data processing, customer support, content creation. SwarmSDK provides single-process orchestration, persistent memory with sem…

GraphQL Schema Stitching for Ruby

A GitHub CLI extension to easily add co-authors to your latest commit.

Outputs a source level execution trace of a Ruby program.

A fast high-compression read-only file system for Linux, FreeBSD, macOS and Windows

Visualize, explore, and interact with your Rails application's models and associations with ease.

An opinionated front-end starter kit for your "nobuild" application

「sinatraで掲示板を作ろう」の解答例