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@st0012

Stan Lo

st0012
London

About My Work

I'm a Ruby committer from Taiwan, working on Shopify's Ruby Developer Experience team. I maintain core Ruby developer tools that developers interact with daily.

Contributions To Ruby

RDoc — I created Aliki, RDoc's new default theme shipped in v7.0.0, bringing dark mode, modern search, and mobile-friendly design to docs.ruby-lang.org. I'm currently improving RDoc's markdown parser and exploring LLM-ready documentation formats.

IRB — I'm the all-time top contributor to Ruby's interactive shell. Recent additions include the cd command, edit command, and extension APIs that Rails console now uses.

ZJIT — I was part of the team building Ruby's next-generation JIT compiler, contributed 80+ pull requests. I also wrote "How Ruby Executes JIT Code" to help developers understand JIT internals.

debug gem — #2 contributor with 400+ commits to Ruby's official debugger.

My Own Projects

I also create and maintain tools for the Ruby community:

  • ruby-lsp-rspec — A Ruby LSP addon that brings CodeLens, document symbols, and go-to-definition to RSpec tests in VS Code.
  • ruby-skills — Claude Code plugins that handle Ruby version manager detection, provide authoritative documentation sources, and integrate Ruby LSP for code intelligence.

Recognition

  • RubyPrize 2025 for contributions to Ruby's developer experience
  • Ruby committer since 2025

What Sponsorship Supports

Your sponsorship helps me dedicate time outside my day job to maintain these tools, respond to issues, and continue improving Ruby's developer experience.

@st0012

I'm paying for a Claude Code Max (20x) subscription to help me improve and maintain OSS projects like ruby-skills, RDoc, and IRB. Any sponsorship to help cover this cost is appreciated. You can read my monthly updates about my work at https://st0012.dev/updates

Current sponsors 2

@igaiga
@avo-hq
Past sponsors 3
@gwillcox-r7
@thnxdev
@codecrafters-io

Featured work

  1. ruby/ruby

    The Ruby Programming Language

    Ruby 23,502
  2. ruby/rdoc

    RDoc produces HTML and online documentation for Ruby projects.

    Ruby 902
  3. ruby/irb

    interactive Ruby

    Ruby 442
  4. ruby/reline

    The compatible library with the API of Ruby's stdlib 'readline'

    Ruby 296
  5. ruby/debug

    Debugging functionality for Ruby

    Ruby 1,257
  6. st0012/ruby-lsp-rspec

    A Ruby LSP addon for RSpec tests

    Ruby 211

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@igaiga @avo-hq

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Thank you for a pint of beer at a London pub 🍻

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Thank you for the generous support! It covers 10% of my Claude Code subscription 🎉