RubyFlow

Ruby Memes 2026-10-15: Pencils Down!

Thu, 15 Oct 2026 17:02:54 +0000

Ruby Memes 2026-10-15: Pencils Down! https://andymaleh.blogspot.com/2026/10/ruby-memes-2026-10-15-pencils-down.html

SolidJobs + SolidTrace + Warm IPC perform worker 2000 alloc/s vs 200 alloc/s sidekiq

Thu, 15 Oct 2026 08:17:21 +0000

We are told that to scale Ruby background workloads across multiple CPU cores, we have two choices: process forking (e.g., Pitchfork) which incurs massive Copy-on-Write memory overhead and risk of OOM kills under load, or database-backed queues (e.g., Solid Queue) which introduce heavy synchronous disk I/O and row-locking bottlenecks [1.8, 1.10]. To break this cycle, I built SolidJobs (v0.5.0): an open-source, Ractor-local Redis task runtime engineered from scratch around a strict shared-nothing architecture [1.8].

Rails engines: a gem that lives inside your app

Wed, 14 Oct 2026 21:05:50 +0000

How to build a feature as a Rails engine in a folder of the main app, loaded as a path gem. Covers isolate_namespace, appending the engine’s migrations to the host instead of copying them, a single lambda hook for auth so the engine never depends on the host, and where engines hurt (specs, Zeitwerk, schema visibility). Real code from a short-link and click-tracking feature.

What Is Service Virtualization: Definition, Types & Tools

Wed, 14 Oct 2026 19:14:11 +0000

Learn what service virtualization is, how it works, its types and benefits, and compare testing approaches that simulate APIs, databases, and external services without live dependencies. https://keploy.io/blog/community/service-virtualization

Threads, Ractors and Fibers in Ruby 4: what I learned by measuring

Wed, 14 Oct 2026 17:02:47 +0000

https://amalrik.github.io/posts/ruby-4-threads-ractors-fibers/

We CanCanCan fix everything

Wed, 14 Oct 2026 09:56:12 +0000

I released a new version of CanCanCan! 3.7.0 is here!

Rails World '26: Rails in the Agentic Era

Wed, 14 Oct 2026 00:40:09 +0000

When I attended Rails World, this is the kind of talk I was interested in: What does the future of Rails look like at scale? How are big corporations using AI agents in a way that keeps humans in the loop? How do the Ruby and Rails ecosystems support AI-driven development workflows?

A practical guide to AI in Rails with RubyLLM: structured text, tools, images

Tue, 13 Oct 2026 15:26:47 +0000

I wrote up the code behind the AI-generated cover images on my blog: a text model summarizes a post, an image model draws the summary, and Active Storage keeps the result. AI with Ruby and Rails: A Practical Guide with RubyLLM goes through it in nine steps with RubyLLM 2.1 and Gemini: a service object for the first call, structured output with with_schema, tool calling, RubyLLM.paint, and moving generation to a background job before Kamal’s proxy times out. It also covers rescuing provider errors and catching the content-filtered reply that comes back empty without raising. The last steps treat user content as data rather than instructions and test without touching the network.

When a database restore signs you in as someone else

Tue, 13 Oct 2026 11:54:04 +0000

Rails 8’s authentication generator mixes up users after a database restore: cookies that were already in browsers start resolving to other people’s sessions. Write-up with a comic, a demo that runs in your browser, and a PR with the fix: https://msg.samsonov.io/2026-09-30-when-a-database-restore-signs-you-in-as-someone-else/

New release of actual_db_schema

Tue, 13 Oct 2026 09:47:06 +0000

Long time no see, guys. I’ve just released actual_db_schema gem v0.10.0.

The Smart Rubyist #1: I prefer to be in top 10% devs who train AI with new ideas

Tue, 13 Oct 2026 01:32:54 +0000

The Smart Rubyist #1: I prefer to be in the top 10% developers who train AI with new ideas https://x.com/AndyObtiva/status/2109689588474163310?s=20

Kill SSH on ECS: get a Rails console via ECS Exec with Terraform

Mon, 12 Oct 2026 20:59:54 +0000

Still keeping port 22 open and a key pair in your launch template just so someone can run rails console in staging? This guide walks through replacing SSH with AWS SSM Session Manager and ECS Exec using Terraform. It covers IAM for instance and task roles, VPC endpoints for private subnets, exec logging, rolling it out through CI, and the gotchas that eat the most time: tasks that predate enable_execute_command, log groups created by hand, and TargetNotConnectedException. It ends with a troubleshooting table and a checklist for production.

I've made a experimental 3d engine that uses mruby

Mon, 12 Oct 2026 19:52:16 +0000

I’ve been building a small 3D game engine using mruby: https://github.com/carlosdanielpohlod/redgem The engine is written in C++, but I wanted Ruby to be the main way to build games with it. It has physics, a 3D editor, Blender level import, and a few other things. It’s still a work in progress, and I used AI quite a lot to help build it. There’s definitely room for improvement, but I thought it would be interesting to share it with the mruby community.

DHH, AI, and the Future of Rails

Mon, 12 Oct 2026 18:30:26 +0000

I was in the audience in Austin when DHH opened Rails World 2026. The conference tagline was “Shaping the future of Ruby on Rails,” so I walked in expecting to hear about the future of Rails.

introducing runsheets, an executable runbook

Mon, 12 Oct 2026 04:30:11 +0000

runsheets is a Ruby gem that serves markdown runbooks as a local web page. Fenced code blocks you mark as runnable get a Run button. Every run is written to a “runsheet” (aka session log) that records each command exactly as it ran, its output, its exit status and timing, and each time the operator signs off on a manual step. Secret inputs are redacted from the output, and a destructive block won’t run until the operator types a confirmation code. runsheets --check lints a runbook, --new builds one from templates, and --run runs a single step from the terminal. It’s a proof of concept, and I’d like feedback from people who use runbooks every day. Install it with gem install runsheets (it needs Ruby 3.4 or newer), and see the docs for more.

LLMCostTracker 0.15.0: per-run budgets for agents, RubyLLM 2.1, more providers

Sun, 11 Oct 2026 06:01:35 +0000

LLMCostTracker records the LLM calls your Rails app makes through RubyLLM, the official OpenAI and Anthropic SDKs or Faraday into your own database: priced per call, tagged by user, feature or any tag, with budgets and a dashboard. No proxy, no prompts stored.

Deploying a Rails 8 App to a VPS with Kamal 2: A Practical Guide

Sat, 10 Oct 2026 23:09:13 +0000

A start-to-finish walkthrough of shipping a Rails 8 app to a single VPS with Kamal 2, using Vite, Solid Queue, PostgreSQL as a Kamal accessory and Docker Hub. It focuses on the errors you will probably hit: a Dockerfile with no Node.js, a database.yml that falls back to localhost, SOLID_QUEUE_IN_PUMA=false turning the Puma plugin on, uncommitted changes that Kamal never builds, and Let’s Encrypt failing on DNS. It ends with what Kamal leaves to you: backups, HA and Postgres major upgrades.

Ruby implementation of scrap: scrap4rb

Sat, 10 Oct 2026 13:53:58 +0000

While searching for quality I found scrap. SCRAP is by Robert C. Martin (Uncle Bob): github.com/unclebob/scrap. The algorithm, the metrics, the smells and the policy numbers in scrap4rb come from SCRAP. scrap4rb is a Ruby implementation. It contains no SCRAP source code. Link to repo: https://github.com/roberthopman/scrap4rb Link to post: https://roberthopman.com/scrap4rb-find-the-messy-tests/

Farce 0.1.0: A new library for working with Ractors and Fiber Schedulers

Sat, 10 Oct 2026 09:19:27 +0000

Farce is a new library for Ractor-shareable, Fiber Scheduler-compatible, concurrent data structures, with support for software transactional memory and a concurrency-model agnostic scheduling API.

Workhorse, a durable PostgreSQL task queue for Ruby and Rust

Sat, 10 Oct 2026 02:08:42 +0000

Workhorse keeps your background jobs in PostgreSQL and runs them in Ruby, TypeScript, Python, Go and Rust.

What Should Go in AGENTS.md for a Rails App?

Fri, 09 Oct 2026 19:23:43 +0000

After working with agents and agent files for tons of apps, repos, projects, I decided to distill my thoughts on it:

rails-preflight: what stands between your Rails app and the next version

Fri, 09 Oct 2026 18:15:27 +0000

I just released a gem that answers one question about a Rails app: what stands between it and Rails X?

Callbacks, Concerns, and Current: Avoiding Hidden Dependencies in Rails

Fri, 09 Oct 2026 15:32:27 +0000

Callbacks, concerns, and Current keep code close to the model, but can hide effects and dependencies. When to use them and how to make those dependencies explicit.

Fixing SPA Link Previews with a Lambda in Front of AWS Amplify (and Why Rails Never H

Fri, 09 Oct 2026 13:49:48 +0000

Link preview crawlers don’t run JavaScript, so every route of a static SPA shares the same generic card. In Rails, a content_for :head block solves this per request. Without a server in the request path, you have to put one back.

Rails 8 with Inertia and React: Hotwire Alternative Guide

Thu, 08 Oct 2026 21:07:59 +0000

Building a Rails 8 admin panel with Inertia and React instead of Hotwire: the trade-offs, the architecture, and a practical tutorial. https://rubyinsights.blog/en/blog/rails-8-with-inertia-and-react-hotwire-alternative-guide