Kieran Klaassen

Capture golden product feedback sessions with screen, voice, DOM, network, and console context for AI agents.

LLM Evaluation Framework for Rails apps to be used with production data.

Thinkroom — where deeper thinking compounds. Try it free at https://thinkroom.kieranklaassen.com

Keyboard shortcuts for Hotwire apps. No dependencies. No configuration. Just HTML.

Agent Skills extension for RubyLLM - load, validate, and integrate skills from filesystem or database

An opinionated Rails DSL for defining extraction schemas for LLM-powered models in Rails and ActiveRecord

AI-powered natural language to SQL generation for Blazer using RubyLLM

A Gem to convert methods to openai JSON schemas for use with tools

Run any instance_method of ActiveRecord models via a job by adding `_later` to it. 👋

✨ Automatically draft pull request descriptions! This GitHub action uses OpenAI's model to draft pull request descriptions for you. 🎯

MusicXML display using VexFlow

Codeigniter version of the mollie Ideal API in php

No description.

Skills I use with Claude for shaping

Your Gateway to Structured Outputs with OpenAI and Ruby.

This is an open-source repository to collect & share the world's wine knowledge

Agent-native CLI and MCP server for FarmBot hardware control

RubyLLM provider gem for OpenClaw Gateway (WebSocket + Ed25519 auth)

Codeigniter version of the mollie sms API in php

🗃 Storybook Design System

The Ruby framework for programming—rather than prompting—language models.

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WIP Same‑domain edge routing between a Rails app and any marketing stack.

Bun-based Terminalwire client - build standalone CLI binaries for any Terminalwire server

Isometric breathwork garden — breathe to green the desert

Chat with Cursor's coding agent through RubyLLM (registers a :cursor provider driving the cursor-agent CLF)

A simple and clean Ruby DSL for creating JSON schemas.

Review markdown docs in a nice interface that lets you leave comments

A terminal-based agentic coding assistant powered by RubyLLM

A delightful Ruby way to work with AI. No configuration madness, no complex callbacks, no handler hell – just beautiful, expressive Ruby code.

RubyGem for Terminalwire

Heya 👋 is a campaign mailer for Rails. Think of it like ActionMailer, but for timed email sequences. It can also perform other actions like sending a text message.

:symbols: A collection of GitHub issue and pull request templates

InvokeAI is a leading creative engine for Stable Diffusion models, empowering professionals, artists, and enthusiasts to generate and create visual media using the latest AI-driven technologies. The solution offers an industry leading WebUI, supports terminal use through a CLI, and serves as the foundation for multiple commercial products.

A gem to add semantic search functionality to Rails applications

Compositional tool

RailsAdmin is a Rails 3 engine that provides an easy-to-use interface for managing your data

A Rails form builder plugin with semantically rich and accessible markup.

ActsAsList plugin

PyroCMS is a CMS built using the CodeIgniter PHP framework with modularity in mind. Lightweight, themeable and dynamic.

Ruby port of MobileMe screenscrapers allowing message sending and retrieval of current location

A fully featured HTML5 WYSIWYG editor written in CoffeeScript on top of the Rails 3.1 asset stack

SuperCollider client for ruby.

fooltrack website

A CodeIgniter Content Management System

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Quack & Co. premium rubber duck e-commerce (LFGBench)

Browser DAW — Pulseforge (Tone.js + Vite + React)

Cozy low-poly Three.js island ecosystem (LFGBench)

The Last Lantern — looping Three.js cozy short film (LFGBench)

My personal website

Virtual whiteboard for sketching hand-drawn like diagrams

Turn your existing Rails app into a native iOS and Android app with Ruby Native.

LFGBench: cozy low-poly Three.js island (May 2026)

Durable execution workflows for Rails

The operating system and all related software that runs on FarmBot's Raspberry Pi.

Simple, powerful, first-party analytics for Rails

LFGBench: cozy low-poly Three.js island

LFGBench: Drift marketing landing (Vite + React + Tailwind)

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A backpack design by Adam Atkins made into a pattern by Kieran Klaassen

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Lightweight coding agent that runs in your terminal

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WIP Bridge JavaScript console output to Rails logs for unified debugging

Library packaging and distribution for Ruby.

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OpenAI API + Ruby! 🤖❤️ Now with GPT4o 🚀🚀🚀

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Nearest neighbor search for Rails and Postgres

Diffusers Stable Diffusion as a Cog model

The administration framework for Ruby on Rails applications.

Gatsby starter styled with Tailwind UI

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Manage your Ruby application's gem dependencies

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A subscription engine for Ruby on Rails.

Example app using the Tokenizable Concern.

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The website for https://www.rebuildblackbusiness.com/

Repository of Twilio SendGrid's product documentation.

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Fetch your top tracks, artists and a list of playlists from Spotify to use it on your Gatsby website

Sample DatoCMS website built with GatsbyJS

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vscode extension to generate changelog.

Source code for our maker website: freesewing.org

Markdown content for FreeSewing's websites

Formtastic form builder to generate Twitter Bootstrap-friendly markup.

🗄️ 💅 config file for prettier

A React library for managing ActiveResource.js resources as components

PDF generator (from HTML) plugin for Ruby on Rails

Simple, powerful email tracking for Rails

Manage translation and localization with static analysis, for Ruby i18n

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The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

An opinionated Rails library for creating JSONAPI servers that lets you focus on customizing the behavior of your endpoints rather than the dirty work of setting them up

A Ruby SDK for interfacing with Litle & Co. payments platform. Uses Litle's online delivery mechanism.

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Automated post-deploy tasks for Ruby/Rails. Your deployment is the party. This is the after party

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Annotate Rails classes with schema and routes info

A Ruby library to read/write files/spreadsheets in Google Drive/Docs.

A convenient Ruby wrapper for the Spreedly API.

Code source of Smart Table module: a table/grid for Angularjs

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Shortener makes it easy to create shortened URLs for your rails application.

Adds singleton functionallity to ActiveRecord models

Sublime Text 2 Plugin to toggle Ruby string literal (e.g. "foo" => 'foo' => %Q{foo}).

Brings Rails named routes to javascript

rails-bootstrap-forms is a Rails form builder that makes it super easy to create beautiful-looking forms with Twitter Bootstrap 3+. Wraps the standard Rails form helpers so it's practically a drop-in replacement.

Ruby on Rails

WYSIWYG editor for Bootstrap, integrated in Rails assets pipeline

Ruby server library for the Pusher API

A date and time picker for Twitter Bootstrap in Rails using Simple Form

A jQuery plugin that gives users real time hints & progress updates as they complete forms

mercury_window_bug

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Pessimistic locking using Redis

A CMS like solution with Mercury-rails as an editor. Just make regions in your views and your admin can begin editing.

Some notes

Repository for collecting Locale data for Ruby on Rails I18n as well as other interesting, Rails related I18n stuff