システムが稼働する上で最初から必要なデータ（マスタデータ）を管理するツールです。

The Model Context Protocol is an open standard that enables developers to build secure, two-way connections between their data sources and AI-powered tools.

SHM Chat app using gRPC and Ricart-Agrawala algorithm

Methodist - a gem for Ruby on Rails created to stop chaos in your business logic. This gem adds generators to your rails application using some patterns: interactor, builder, observer and client. Just use `rails g <pattern> <new_class_name>`. Docs: https://github.com/QNester/methodist/wiki

Method-Ray is a static analysis tool that checks the callability of methods in Ruby code.

SurrealDB client for Ruby (HTTP and WebSocket)

Custom OmniAuth strategy for OpenID Federation providers using openid_connect gem, supporting signed request objects (RFC 9101), ID token encryption/decryption, client assertion (private_key_jwt), and OpenID Federation entity statements. Framework-agnostic and works with Rails, Sinatra, Rack, and...

Read environment variables from 1Password fields (dotenv/json/yaml format) or all fields using the op CLI or 1Password Connect Server API. Export local .env files back to 1Password.

Simplifies getting the right configuration options for a process using pre-loaded configurations from files to manage options for experiments or flights.

Helps convert hashes to immutable objects.

Scalable infrastructure management with Ruby DSL compilation to Terraform JSON. Features template-level state isolation and automation-first design.

A utility gem for normalizing parameters in Rails applications.

A small Ruby library for constructing parsers in the PEG (Parsing Expression Grammar) fashion. Parsanol provides Parslet-compatible API with additional features including static frozen parsers and dynamic parsers, with optional Rust native extension for improved performance.

Parallel tests, coverage (SimpleCov-compatible) formatters, fixtures/snapshots, assets & DB provisioning—zero runtime deps

Predicateable allows you to define predicate methods (like `admin?`) based on a method that returns a Symbol. Similar to Rails enums, with optional strict checking and prefix support.

Decompiling from Ruby to proto file.

Property based testing tool with RBS

Runtime type tracer for ruby

Rails Clock provides a centralized way to manage and control time in Rails applications, similar to Trice

A RBS files generator for ActionMailer