RubyFlow

readword: word .doc and .docx files to markdown, in plain ruby

Fri, 23 Oct 2026 09:05:41 +0000

i kept needing to feed word files to llms and coding agents, and reading old .doc files from ruby always meant shelling out to libreoffice or antiword. so i wrote readword, its plain ruby, reads both .doc and .docx and gives you markdown with the headings, numbered lists, tables and links kept. compared it with antiword, the docx gem and anydoc on 650 files, numbers are in the readme. if you have a word file it gets wrong id love to see it

Solid Queue or Sidekiq? Choosing a background job backend for Rails 8 in 2026

Thu, 22 Oct 2026 15:14:13 +0000

A comparison of Solid Queue 1.7 and Sidekiq 8.1 for Rails 8 apps: Rails version support (Solid Queue needs 7.1+), DB vs Redis tradeoffs, fiber mode, batches, feature parity, operational cost, and how to migrate between them.

Playwright API Testing Guide

Thu, 22 Oct 2026 10:19:54 +0000

Playwright isn’t only for browser tests. With the community playwright-ruby-client gem, Ruby developers can send requests straight to a Rails API, check responses and reuse login sessions across tests, no browser needed. This post covers getting started, handling auth, and keeping backend dependencies stable so your API tests stay fast and reliable. https://keploy.io/blog/community/playwright-api-testing

Best Automation Testing Tools for API Testing in 2026: 12 Tools Compared by Use Case

Thu, 22 Oct 2026 05:41:37 +0000

Picking an API testing tool for a Rails app usually means choosing between a lot of options that each solve a different part of the problem. This comparison of the best automation testing tools looks at 12 of them by use case: CI/CD automation, manual exploration, performance, security and SOAP. It covers Keploy, Karate, Postman/Newman, Bruno, Insomnia, k6, JMeter, OWASP ZAP and SoapUI, and includes a comparison table and a short guide for choosing a tool. Since these tools work over HTTP and don’t depend on the language, they apply to Rails and Sinatra APIs as well.

The Agents on Rails Files: designing black-box evals for coding agents

Wed, 21 Oct 2026 18:39:44 +0000

Agents on Rails is the Rails Foundation’s LLM benchmark. Evil Martians designed its evaluation tasks and the tooling to run trials at scale. On our blog, we’re going behind the scenes. First up: how we wrote black-box checks for apps whose code we’d never seen, to keep trials fair and results reliable. Bonus: the same evals run against Rust.

Seven layers of cache in a Rails app, from the browser to Russian doll

Wed, 21 Oct 2026 17:11:05 +0000

This post walks through the seven places a request can be answered before it reaches Postgres: browser cache (expires_in, fresh_when), Varnish, Nginx proxy cache, action caching, Russian doll fragments in ERB and jbuilder, Rails.cache on Memcached or Solid Cache, and an object cache on Redis. Each layer comes with its config, what it actually saves, and how it breaks (cookies vs Varnish, CSRF in cached actions, sharing Redis with Sidekiq). Ends with a suggested build order: headers first, edge last.

RubyLLM 2.0 and 2.1 are out and the gem is much better than before

Wed, 21 Oct 2026 08:16:12 +0000

I wrote a thing or two how RubyLLM 2.x is improving agents.

SprintCo — A daily work log built with Ruby on Rails

Wed, 21 Oct 2026 06:01:30 +0000

URL: https://sprintco.dev/?ref=rubyflow

Regression Testing: Techniques, Tools & Best Practices

Wed, 21 Oct 2026 05:20:45 +0000

Learn regression testing, its types, techniques, tools, and best practices. Explore how automated regression testing helps detect bugs and maintain software quality. https://keploy.io/blog/community/regression-testing-an-introductory-guide

Why a Background Job Can Run More Than Once

Wed, 21 Oct 2026 04:35:51 +0000

A deploy can replay unfinished Solid Queue jobs without retry_on, even after a webhook succeeds. Trace fork-mode shutdown, the effect that survives, and receiver-side duplicate protection, with source links and a separate process-death reproduction.

API Versioning in Rails: Start at /api/v1 Before You Think You Need It

Tue, 20 Oct 2026 18:47:57 +0000

Most Rails APIs start as a format.json branch in an HTML controller and only become an API once a partner depends on them. This post lays out the structure to put in place before that: URL path versioning starting at /api/v1, an Api::BaseController < ActionController::API that owns auth, error envelopes and transaction tagging, and one thin base per version.

RedGem 0.3 (3D engine with ruby) is out!

Mon, 19 Oct 2026 17:22:46 +0000

This update brings bigger worlds, better visuals, and online multiplayer.

parallel_matrix_formatter: one readable display for parallel RSpec runs

Mon, 19 Oct 2026 14:57:42 +0000

Running specs with parallel_tests or parallel_split_test gives you interleaved output from every process and a separate failure report per process. parallel_matrix_formatter is an RSpec formatter that sends results from all processes over a UNIX socket to process 1, which renders a single progress display and one consolidated failure report with rerun commands. It also silences stray stdout, keeps each process’s stderr in a log, and the progress display looks like Matrix digital rain. Version 0.2.0 is out: gem install parallel_matrix_formatter. Feedback from real suites is very welcome.

Asgard 0.5.0 adds dynamic task execution on file/directory changes

Mon, 19 Oct 2026 05:44:24 +0000

Asgard 0.5.0 adds a file watcher to the Ruby task runner. In a project’s .loki, watch :test, paths: %w[lib test], only: /\.rb\z/ declares which files a task cares about, and asgard watcher start runs one background process per project that reruns the task when they change.

New release Truemail 🚀 configurable framework agnostic plain Ruby 📨 email validator

Sun, 18 Oct 2026 20:31:22 +0000

Meet new Truemail 4.0.0. https://github.com/truemail-rb/truemail This major release hardens MX validation against IDNA-mapped confusable/fullwidth domains. Spoofed Unicode domains are no longer treated as valid ASCII lookalikes.

Foreman or Docker Compose? The ideal local Rails setup in 2026

Sun, 18 Oct 2026 18:18:39 +0000

Native Procfile.dev or everything in docker-compose? This post argues for a hybrid: run web, css, js and workers natively via bin/dev, and keep only Postgres and Redis in a minimal compose file pinned to production versions. It covers why bind mounts slow Rails down on macOS, the Postgres 18 volume path change, OrbStack vs Docker Desktop memory usage, when a devcontainer still wins, and dropping Redis in dev with Solid Queue.

A new version of bidi2pdf is out

Sun, 18 Oct 2026 07:54:22 +0000

The highlight of this release is built-in support for Claude Code skills. The repository now includes a Claude Code plugin with skills that help AI agents generate PDFs, troubleshoot rendering issues, and work with Chrome through WebDriver BiDi.

ruby_llm-providers-lms v0.3.0 with decisions API released

Sun, 18 Oct 2026 01:43:20 +0000

ruby_llm-providers-lms 0.3.0 brings RubyLLM 2.1’s judgments to LM Studio. Point RubyLLM.judge or a RubyLLM::Judge class at a local decision model and get typed answers back in tens of milliseconds: a probability that something is true, a choice from a fixed set with a confidence, or a score on an ordered scale, with no text to parse and nothing generated.

Standard Ruby on Apple Silicon and Docker: one linter, two runners

Sat, 17 Oct 2026 20:42:33 +0000

Standard is RuboCop with an unconfigurable ruleset, and that removes a whole category of style debates from code review. The post covers what it gives you (--fix, --generate-todo, plugins like standard-rails, the Ruby LSP add-on) and how it layers its config on top of RuboCop, first-in-wins.

Fat Rails Models Might Be a Domain Modeling Problem (Kaigi on Rails 2026)

Sat, 17 Oct 2026 07:40:12 +0000

Fat Rails models aren’t always a sign that we need another architectural layer. Sometimes, we’re missing a domain concept. I explored this idea in a talk at Kaigi on Rails 2026.

llm.rb v17.0.0 released!

Sat, 17 Oct 2026 00:55:53 +0000

llm.rb is an agentic runtime for building AI applications on CRuby. It supports 14 different providers, it has zero runtime dependencies by default, and it can execute tool calls on their own process, thread, Async::Reactor, or Ractor. It can reliably interrupt an agent running in the same process but a different thread or fiber, too. Plus much more. Check it out if that sounds like your thing :)

A small RSpec helper that saves code, risk, and AI tokens

Fri, 16 Oct 2026 21:07:58 +0000

https://widefix.com/blog/stub-env-rspec-and-ai-instructions/

Upgrading a Rails app from Ruby 3.4.4 to 4.0.3: what actually breaks

Thu, 15 Oct 2026 21:15:32 +0000

Ruby 4.0 is the first major bump in over a decade, but a Rails 8.x app usually upgrades in a day of focused work. Most of the pain is not in the language: it is gems that left the default set (cgi, ostruct, logger, benchmark), the Ractor::Port rewrite, Kernel#open("| cmd") no longer spawning a process, and a handful of changes that break tests rather than code (Set#inspect output, Net::HTTP no longer defaulting Content-Type on bodies, new backtrace frames that confuse Sentry/Datadog grouping rules).

Gravity Defied, the old fashion motorbike game, rebuilt with pure Ruby physics

Thu, 15 Oct 2026 17:26:21 +0000

Remember Gravity Defied, the motorbike game from old Nokia phones? I rebuilt it on DragonRuby GTK with the physics written in pure Ruby: no physics engine, just six point masses joined by springs and 16.16 fixed-point math. Thanks to WebAssembly, you can play it right in the browser with all 30 original tracks. Since every run is deterministic, a small beam-search bot finds clean runs offline, and the game replays them frame for frame

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