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Learn how to design and build effective tools to be used by AI Agents

AsterMind-ELM is a modular, Extreme Learning Machine (ELM) library for JavaScript and TypeScript. We speak to its creator.

Build a Kanban board with columns and cards with Rails and Hotwire.

We get attached to code - sometimes to a fault. Old migrations are exactly that. They’re digital hoarding at its finest, cluttering up your codebase with files that serve absolutely no purpose other than to make you feel like you’re preserving some kind of historical record. But here’s the brutal truth: your old migrations are utterly useless. They’re worse than useless - they’re actively harmful. They’re taking up space, they are confusing (both for you and new developers on the project), and they give you a false sense of security about your database’s evolution. If your database is out-of-sync with schema.rb you need to solve that problem anyway, and - if anything - the migrations make that problem worse.

Learn how to orchestrate AI agents in Claude Code to multiply your development output. No frameworks, just folders and markdown that turn one developer into five specialists.

The Rails router's direct method lets you create custom url and path helpers, which is especially useful for polymorphic models and delegated types. This post shows how to use a single custom helper to generate URLs for different models, with a practical example from the open source Maybe project.

Rails 8 is out. And with it Kamal 2, the new default way of deploying Rails apps. But Kamal is hard for the uninitiated. This is a complete tutorial on how to get a Rails app fully in production using Kamal.

Learn how to implement authentication in Rails API-only applications using generators. Step-by-step guide covering setup, configuration, and best practices for secure API authentication.

From basic setup to advanced MCP integration: using Dev Containers for portable development environments that eliminate "works on my machine" problems.

Look through some of the best custom elements on the planet.

Across performance reviews, design decisions, and strategic communication, AI tools can reduce overhead and amplify the impact of strong management. 

Organizational change can rock the foundations of any team. But knowing the reasoning behind the shift can open all sorts of doors.

Learn some ways to help encourage action when you feel unmotivated.

An overview of what makes modern CSS so awesome.

New to Postgres 18, features like asynchronous i/o, uuid v7, b-tree skip scans, and virtual generated columns.

From the very beginning of Slack, MySQL was used as the storage engine for all our data. Slack operated MySQL servers in an active-active configuration. This is the story of how we changed our data storage architecture from the active-active clusters over to Vitess — a horizontal scaling system for MySQL. Vitess is the present…

A better Action Text.

Rails variants are usually used to serve different views for devices — but you can use them for much more, like running a redesign side by side.

Rubular set the standard for regex testing in Ruby. With Ruby 3.2 bringing WebAssembly support, Wubular takes that idea into the browser — no servers, instant feedback, full privacy. It’s not just a remake, but a glimpse of what Ruby + WASM make possible for future apps.

Anchor positioning allows you to place an element on the page based on where another element is.

Accessibility does not limit creativity! Explore six distinct WCAG-compliant yellow and purple palettes and learn how to design your own.

We'll dive into how ActiveStorage handles uploaded data and how to extend this process in the second part of this two-part series.

Documents how to implement the RAG pattern with llm.rb

Startups and scaleups are on a hiring spree for a software engineering role pioneered by Palantir. A deepdive into this role, and why FDEs are so popular in 2025

Create a macOS-inspired stack UI by using powerful Tailwind CSS features and a simple Stimulus controller (with a twist)