Reanimator reads a repository, infers what "healthy" means for it, and proves that health without changing a single line of code. It classifies lifecycle intent, discovers a vitality contract from evidence, resolves an effective policy, and produces a read-only proof-of-life baseline - before any coding agent or write permission is ever involved.

Rebundler makes your Gemfile look good.

Scaffolds a recordings/recordables/events content spine into a Rails app, and keeps the snapshot copy-forward logic that is easy to get silently wrong.

redis locker gem allows to lock model methods to prevent concurent execution

ReferenceExtractor parses Ruby code to produce a graph of constant and file references that other tools can use for rules like layering or dependency checks.

Simple DSL-driven data transformation for Ruby

TOY Regular Expression Engine in Pure Ruby

A Rack-based Web Framework, but with extra awesome.

Ruby's hackable AI web environment

Re:map; an expressive and feature-rich data transformation mapper for Ruby 3. It gives the developer the expressive power of JSONPath, without the hassle of using strings. Its compiler is written on top of an immutable, primitive data structure utilizing ruby's refinements & pattern matching capabilities – making it blazingly fast

CLI for remote development

Yet another way to retry some block of code in Ruby

Exposes Resque queues, workers, and failed jobs to MCP clients via a Streamable HTTP endpoint mounted in the host Rails app.

Define your resources with a clean DSL, and RestEasy handles naming conventions, type coercion, serialisation, authentication, and HTTP plumbing — so you can ship an API gem with minimal boilerplate.

Retag is cli to manipulate docker images in handy way

Simulates realistic Revel Systems POS operations against the sandbox API. Generates orders, payments, and transaction data across 4 business types.

Rexer is a command-line tool for managing Redmine Extension (Plugin and Themes). It allows you to define extensions in a Ruby DSL and install, uninstall, update, and switch between different sets of the extensions.

RuboCop CLI that only lints and auto-fixes code you committed by utilizing `git-log` and `git-diff`. Rfix CLI makes it possible to lint (`rfix lint`) and auto-fix (`rfix local|origin|branch`) code changes since a certain point in history. You can auto-fix code committed since creating the current branch (`rfix origin`) or since pushing to upstream (`rfix local`). Includes a RuboCop formatter with syntax highlighting and build in hyperlinks for offense documentation. Holds the same CLI arguments as RuboCop. Run `rfix --help` for a complete list or `rfix` for supported commands.

An interactive terminal agent (read/write/edit/bash) built on the riffer agentic framework.

Provides round progression, win detection, yaku evaluation, and score calculation for riichi mahjong, independent of Rails or ActiveRecord.