StandardLedger marks ActiveRecord models as immutable, append-only journal entries with idempotency-by-unique-index, provides a StandardLedger.post helper that returns a Result (optionally the host's own Result type), a Projection base class for host-side projectors, and StandardLedger.refresh! f...

StandardPagination wraps pagy with one controller concern, one metadata shape, safe page-size handling, out-of-range error handling, deterministic tie-broken ordering, and an MCP list helper shared across Rails apps.

Provides a wrapper around concurrent-ruby's Concurrent::Future to automatically wrap it in a Rails-friendly executor.

Gem created in order to consume READi System Webservices

StarKit Banking Interface

Provide the bang and predicate methods for Active Record

Rails support for stateless-mcp: a tool is a controller action, routed by the Mcp-Method and Mcp-Name headers of the 2026-07-28 Model Context Protocol, and tools/list is drawn from the routes.

Stately symbol font, packaged for Ruby on Rails.

StatesmanScaffold generates StateMachine, Transition classes, and migrations for ActiveRecord models using the Statesman gem. Includes a WithStateMachine concern that wires up state machine delegation, query scopes, and transition associations with a single `with_state_machine` class macro.

Staticman build static pages, e.g. errors, about, contact, and it's very easy, fast, programable

Tiny DSL for code in controllers

Precompiled Handlebars.js templates for the Rails asset pipeline

This gem provides Stellar.js for your Rails 3 application.

Keep your Rails on track by enforcing a rules-based architecture.

Behavior-only, accessible UI primitives for Rails: WAI-ARIA state, keyboard interaction, focus management and Turbo resilience as data-attribute-driven Stimulus controllers, with no CSS. Ships the prebuilt stimeo-ui JS and a `stimeo:install` generator that vendors it into an importmap-rails app.

Helper to integrate Stimulus into Rails application

A full-featured PDF viewer with annotation support (highlights, underlines, notes, drawing) for Rails applications. Uses Stimulus controllers and requires no Node.js or npm.

Stimulus controller and view helpers that add instant search, filter dimensions, multi-column sort, pagination and live footer stats to any Rails table. Everything is wired through data attributes, with no JavaScript dependencies or configuration required.

Encrypted, database-backed session store for Rails.

Create fully native controls, driven by your web app.