st0012.dev
I’m Stan Lo, a Ruby committer on Shopify’s Ruby Developer Experience team.
I work on the infrastructure around Ruby development: documentation, REPLs, language tooling, and AI coding workflows.
On the side, I build cctop, a macOS menubar app for monitoring AI coding sessions across Codex, Claude Code, opencode, and pi.
I write about Ruby, open source maintenance, AI coding tools, and the projects behind them.
- ruby/rdoc# documentation tool
- ruby/irb# the REPL
- ruby/reline# line editor
- ruby/ruby# random bits
- st0012/cctop# AI session tracker
- Shopify/rubydex# indexer + MCP
Latest posts
- 2026-04-10 12 min read Building a Career with Open Source: From User to Maintainer My experience building a career with open source as a non-native English speaker with no CS background. How I picked projects, built trust with maintainers, and made my work visible.
- 2026-01-24 Ruby Skills: Teaching Claude Code About Ruby's Tooling And Ecosystem
- 2026-01-12 My RDoc roadmap for 2026
Project updates
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April & May 2026
2026-06-13
This update covers April and May together. In April most of my time went into prototyping and preparing for my RubyKaigi talk, The future of Ruby documentation, so I made less progress on my projec...
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March 2026
2026-04-03
March was a productive month across several projects. On the RDoc side, I focused on making server mode reliable and started work on RBS type signatures in documentation. I also made CI faster in r...
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February 2026
2026-03-08
In February half of my time went into cctop — a macOS menubar app I built for monitoring Claude Code sessions. I have built a workflow around this small utility and improved it continuously. On the...