Moult sheds dead code. `moult hotspots` ranks files by a complexity x churn score (Prism-parsed ABC complexity per method x per-file git churn); `moult deadcode` lists confidence-graded unused-method and unused-constant candidates over a rubydex definition graph, with Rails entrypoint awareness. Every finding carries a confidence and its reasons, never a claim of certain death.

Necropsy combines static call-graph reachability, optional dynamic evidence, and CI guardrails for Ruby dead-code detection.

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.

Augments ruby-lsp hover and go-to-definition with type information from sorbet/rbi/**/*.rbi. Drop it in your Gemfile and it just works.

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

Inspects your Rails routes, controllers and schema to produce config/rails-api-docs.yml, then renders a Scalar-style three-column HTML page at public/api-docs.html. Includes a live preview mount at /rails/api-docs in development.

RailsContractSync produces and maintains a single committed openapi.yml for a Rails JSON API by combining static route/strong-params introspection with runtime observation of real responses via a Rack middleware. The result is idempotent, preserves hand-written documentation, and is serializer-agnostic.

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.

Rebundler makes your Gemfile look good.

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.

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>).