Doorkeeper

Reading Rails 1.0 source code / AI for Rails PRs

Wed, 20 Aug 2025 18:30 - 21:00 JST

Le Wagon Tokyo

東京都目黒区目黒2-11-3 印刷工場1階

Register
Free admission
Drinks and food will be provided
There is room for 30 more people

Description

Agenda

18:30 〜 19:00 Doors open

Grab a drink and catch up with your fellow Rubyists.

19:00 ~ 19:05 Opening

We'll kick things off by welcoming everyone and giving a short introduction of the event.

19:05 〜 19:35 Reading Rails 1.0 source code - Masafumi Okura

Rails is great. In fact, Rails has been great since the very beginning. However, in terms of technical details, Rails 1.0 was very different from Rails 8. Lots of things have changed, many frameworks have been introduced and overall quality has been polished.
This leads to an interesting question. What makes Rails Rails itself? What is the core part of Rails that still remains after 20 years?
In this anthropological talk, we dive into the source code of Rails 1.0 and explore internals.

Profile

Masafumi is a freelance software developer mainly focusing on Ruby and Rails. He the chief organiser of Kaigi on Rails, and also helps organise other software communities in Tokyo and online. Along with speaking at meet ups, he's also been at speaker at RubyConf, RubyKaigi, Euroko and RubyConf Taiwan.

19:35 〜 20:05 AI for Ruby PRs - Paulo

How good are LLMs at reviewing PRs? Which one is the best? And how much does prompt engineering change the results?
We've analysed a variety of models in various combinations to find the answer. Join to learn about the process and discover the result!

Profile

Paulo is a backend Ruby on Rails developer, and an active member of various tech communities both online and offline. He’s interested in infrastructure, mentoring junior developers and hopes to one day lead his own team. Outside of tech, he’s passionate about the colour orange, and European medieval martial arts - where he dons functional replicas of historical armour and fights with rattan and steel weapons.

20:05 〜 21:00 Open Networking

Discuss the presentations or anything else Ruby related with the other attendees.

Food Sponsor

TokyoDev's job board is filled with software developer positions at Japanese companies whose engineering team’s primary language is English. From the big companies you’ve already heard of, to smaller up-and-coming startups, our positions offer you the chance to live in Japan but work in an international environment.

Drink and Venue Sponsor

Le Wagon Tokyo is a coding school for startups, creative people and tech entrepreneurs. Our 9-week full-time or 24-week part-time Coding Bootcamps are designed for complete beginners or "half-beginners" who really want to dive into programming and, above all, change their mindset. Learn to think like a developer, consider issues with new insight, and become more autonomous thanks to these newly acquired abilities.

Code of Conduct

Tokyo Rubyist Meetup is a safe and inclusive event. By attending, you agree to our code of conduct.

About this community

Tokyo Rubyist Meetup

Tokyo Rubyist Meetup

Tokyo Rubyist Meetup (trbmeetup) is an event that seeks to help bridge the Japan and international ruby and ruby on rails community. It will hold regular meetings where Japanese Rubyists can commun...

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