A Rails gem that provides Japanese address completion and validation based on Japan Post postal code CSV data. Supports address lookup by postal code, prefix search, and address/postal code consistency validation.

Useragent sniffing tool to choose the more appropriate image format between JPEG and WebP.

JSONRPC Interface for Ruby projects realised in object oriented way. JRPC Request, JRPC Notification, JRPC Response, JRPC Error Response, JRPC Object Builder and JRPC Error Codes.

JSON Schema based serializer

Simple client for Cloud Firestore

This is the official Ruby SDK for [Project Kessel](https://github.com/project-kessel), a system for unifying APIs and experiences with fine-grained authorization, common inventory, and CloudEvents.

Don't write your code, and rbs types! Write the rbs types first, then generate a template to fill in with business logic.

A Ruby extension implementing the R-tree spatial-index of Guttman-Green.

Provides the set of classes to simplify work with Google services

Contains set of classes to work with Google Docs based lesson objects

A lightweight Ruby gem that detects CPU quota from Linux cgroups (v1 and v2) and returns the appropriate number of processors for container environments. This is a Ruby equivalent of Go's uber-go/automaxprocs.

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.

Generate Diagrams and Flowcharts with Mermaid

Meshgrid generator for 2D & 3D Numo::Narray.

MitchAI is an intelligent CLI tool that leverages artificial intelligence to provide comprehensive code reviews, helping developers improve code quality, catch potential issues, and receive actionable insights.

Nature Remo API client for ruby.

Provides tools for easy setup of custom onboarding to boost engagement.

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

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.

Declares an API problem on the exception class — its type, title and status — and renders any of them as application/problem+json, from a controller concern for the errors a controller raises and from an exceptions app for the ones that escape it.