How I Hunted Down 23 N+1 Queries in a Rails App With Claude Code
TL;DR Our Rails app's p95 response time had crept from 280 ms to 1.4 s over a year, and nobody could say why. I paired with Claude Code for four day…
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Why change-impact analysis is surprisingly hard in Ruby on Rails
Refactoring a mature Rails app often starts with a simple question: If I change this method, what else could break? In a smaller codebase, grep migh…
Building a Radio Player with Ruby & WebForms Core
WebForms Core (WFC) is a web development technology owned and developed by Elanat . It provides a server-driven approach for building interactive we…
Your Webhook Endpoint is a Tiny Distributed System
If you want the Rails implementation version of this, Webhooks in Rails goes deeper on verification, durable receipt, idempotency, retries, jobs, te…
Stop Writing Ruby Tests in JS Template Literals: Meet rspec-wasm
If you have built applications with ruby.wasm , you might have encountered a frustrating developer experience when writing unit tests. Testing Ruby…
Re-Organized configuration in Rails
A while back I wrote about organizing configuration in Rails . The idea was simple: drop YAML files into config/configurations/ and get namespaced c…
RubyCoder.ai: A Professional Network for the Ruby Community
Ruby has one of the most established developer communities in software, but the knowledge, tools and people that make up that ecosystem are often sp…
I Tested Rails Baseline by Leaving Architecture Out of the Prompt
Note: Rails Baseline is the production-ready Rails foundation I tested here. It gives a new SaaS application and the coding agents working in it cle…
Tooling every AI software harness should have
When an agent writes the code, you stop reading every line. You can pretend otherwise for a while, but on any real codebase you end up skimming a 60…
I Could Hack My Own Rails App With One Hidden Input
I've been building RepBoard , a Rails app that gives freelancers a portable reputation profile — collect reviews from clients, share one professiona…
When a build breaks, the bug fixes itself
When a build breaks, the bug fixes itself We stopped babysitting CI failures. Now a red build files its own bug — and an AI agent picks it up and sh…
Built a Blog App with Rails & PostgreSQL – Looking for Code Review!
Hey DEV community! 👋 I've been working on a Blog Application built with Ruby on Rails to practice backend architecture, clean code standards, and Ra…
Work-in-progress updates on my new book, Testing Rails from Scratch
Hello! It has been a couple of months since I announced my latest project, Testing Rails from Scratch: A practical, (mostly) out-of-the-box approach…
They scoped the customer and forgot the customer's ledger — a High-severity cross-tenant BOLA in Open Food Network
TL;DR What: POST /api/v1/customer_account_transaction in Open Food Network authorized against the class , not the record. It took customer_id straig…
One Rails request, one event: production context for coding agents
Wide Events is a Rails gem that puts the production context a coding agent needs onto one OpenTelemetry root span per request or job. In one product…
Kubernetes earned its security badge in 2017 and never came back
Kubernetes has an OpenSSF Best Practices badge . It earned that badge on 16 August 2017 at 14:52:28 UTC, and nobody has touched the entry since. The…
[Ruby] The True Value of Flow Control Operators
Introduction Ruby has four types of logical operators: && / || / and / or , each with a different precedence. && / || have higher pr…
3 Action Mailer Features I Didn't Know Existed
A few weeks ago I needed to check something in the Action Mailer docs, just a quick lookup. I ended up spending much more time there than expected a…
Ruby Reactor vs dry-transaction vs Trailblazer: Choosing a Ruby Workflow Library in 2026
Four ways to orchestrate business logic in Ruby. One map to find yours. You're building something that involves multiple steps. Charge a card, send…
Rails already ships class_names. I built clsx anyway.
When I published a little gem for conditional CSS classes two years ago, the first comment was Adrien Poly asking the obvious thing: "What is the ma…
The four places a hand-rolled Ruby facade gives out
You don't need a gem to build a facade. This is a perfectly good one: class App def self . config = Rails . configuration def self . redis = REDIS_P…
Kiro for Ruby: Generating Rails Controllers and Models
You want to add a new resource to your Rails app. You know the drill — rails generate , tweak the migration, add validations, write the controller a…
How to Match Orders in 100 Lines of Ruby
Order matching has dropped in Shitcoin Swap in ~100 lines of Ruby . Most crypto exchanges reach for an existing matching engine or a Uniswap-style A…
How you zip larger files in ruby
Easy way that compress files in ruby is using zip lib. Zip :: File . open ( './compress.zip' , create: true ) do | zip | zip . get_output_stream ( "…
The webhook inbox pattern: stop writing this controller by hand
Every Rails app that takes Stripe webhooks has some version of this controller: def create payload = request . body . read sig_header = request . en…
The Silent Performance Killer in Rails: Understanding and Fixing N+1 Queries
If you've ever investigated a slow Rails endpoint, chances are you've encountered one of the most common performance problems in the Rails ecosystem…
Dynamic OG Images in Rails
Every blog post, product page, and profile in a Rails app deserves its own Open Graph image, the picture that shows up when someone shares the link…
Rails Performance Optimization: Fixing N+1 Queries with includes, preload, and eager_load
Originally published on Hashnode: https://railswithyashika.hashnode.dev/rails-performance-n-plus-one-queries When working with associations in Rails…
It Worked on My Machine (Literally)
I have a TRMNL on my desk. If you haven't seen one, it's a little e-ink display from trmnl.com that shows you whatever you tell it to: your calendar…
Pressure-testing Ota on Discourse: repo-wrapper truth matters more than a passing bundle command
Overview Discourse turned out to be a good pressure repo for a narrow but important reason: the difference between bundle existing and the repo's re…