PRISM is amazing but we need to use it responsibly and only load the AST once, do that with Lowkey!

A layer of abstraction on top of Ripper for handling Abstract Syntax Trees in Ruby.

A MLIR dialect for ruby

Configure Minitest with common plugins and options to make it even nicer to use.

A production-ready AI agent platform: multi-provider (Ollama, OpenAI, Anthropic), typed tool system with permissions, three-tier memory, structured observability, loop detection, plugin architecture, interactive REPL, and project indexing. Works out of the box with local Ollama models; drop in OpenAI or Anthropic keys to upgrade.

Optimize is an ahead-of-time YARV bytecode optimizer for CRuby. It decodes iseq binaries into an in-memory IR, runs a configurable pipeline of passes (constant folding, inlining, dead-stash elimination, arithmetic reassociation, and others) under a narrow contract that the program's hot path respects, and re-emits an optimized iseq. Intended as a demo and an experiment, not a production compiler.

A tool for writing manuals for Prawn and Prawn accessories

extend ruby prism

Prism-backed Ruby provider gem for the Structured Merge Ruby family.

Proscenium integration for Phlex

A RBS files generator for activerecord gem

RBS inline annotator from RBS

Support auto generation of RBS by `Data.define` in rbs-inline syntax

Rubyists love metaprogramming. This tool bridges between RBS and metaprogramming, by allowing you to define a macro, which is then used to generate RBS definitions based on macro invocations."

Build reactive, real-time UI components that automatically re-render server-side when subscribed models change. Uses ViewComponent, Turbo Streams, and ActionCable to keep your UI in sync without writing custom JavaScript.

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.

Ruby code rewriter.

CLI utility and Ruby API for generating structured release notes and changelog documents from various issue-tracking platforms or YAML definitions into plaintext drafts (<strong>AsciiDoc</strong>, <strong>Markdown</strong>, <strong>YAML</strong>) and rich-text output (<strong>HTML</strong> and <strong>PDF</strong>).

Rigor is a CLI-first static analyzer for Ruby applications that prioritizes type inference, clean application code, and zero runtime dependencies.

RLSL is a Ruby DSL for writing shaders that can be transpiled to GLSL, WGSL, and MSL