Four Line Fridays: Oh My God It's All On Fire Edition

Four Line ... AAAAAGGHHHH

Welcome to Four Line Friday! Every week on Fridays, I’m sending you four lines of 120 characters or less that help you ship better, more performant Ruby.

Here’s your four lines:

1. After this week’s security fracas: Setup DeepSeek Flash v4.1 1041 via Vercel/OpenRouter. No security refusals for me.

2. If you’re running Regexp.new(user_input) somewhere, upgrade Ruby today. Give this audit prompt to DeepSeek.

3. If you’re looking to move off of Railway, I like Northflank. A lot of our clients also like Render.

4. Callum Flack compiled a great power prompt list: <280-character ‘idioms’ that work well when prompting agents.

Thanks for reading! We’ll see you next Friday.

Want to see past Four Line Fridays? I’ve got every single one in a searchable archive here.

I’m Nate, the author of The Complete Guide to Rails Performance, a maintainer of Puma, and owner of the Rails perf consultancy Speedshop. You’re on this email list because you either bought something from me or signed up in the past.

In the meantime, follow me on X, Mastodon, or Bluesky, or consider buying:

The Complete Guide to Rails Performance, my “reference manual” for all things Rails perf.

Sidekiq in Practice, a workshop to improve your Sidekiq operational skills.

The Rails Performance Apocrypha, a meandering fun read about a potpourri of Rails perf topics.

Or maybe we should work together? Over 10 companies now have me on permanent retainer to help supercharge their performance and platform engineering.

-Nate