Hello there 👋

A Ruby on Rails Engineer by day ☀️ and an open-source toolsmith by night 🌙

Software Engineer & Ruby on Rails Developer based in Việt Nam 🇻🇳
Building backends with Ruby on Rails — and the tooling that makes everyday Rails work faster and safer

• ⚙️ I use daily: .rb, .erb, .sql, .sh, .yml, .js
• 🌍 I'm mostly active within the Ruby on Rails community
• 🛠️ I build developer tools: typed params contracts, plug-and-play concerns, per-worktree dev environments
• 🤖 I use AI day by day to build my workflows — agentic coding, gem-aware code review, custom Claude Code plugins
• 📚 I curate best_rails_gem — a field guide to production-grade Rails gems
• 💬 ping me about ruby, rails, gems, developer tooling, layered design

🧰 Toolbox

🚀 Things I've built

Project	What it does	Quick install
permittable	Typed, validated params contracts for Rails controllers + schema-drift guard	gem 'permittable'
concerns_on_rails	Plug-and-play ActiveSupport concerns for Rails models and controllers	gem 'concerns_on_rails'
worktree-kit	wt — run commands and app servers per git worktree, with per-worktree DB/Redis isolation	brew install vsn2015/tap/worktree-kit
gem-docs-review	Claude Code plugin: offline gem-doc cache + gem-aware Ruby/Rails diff & PR review	/plugin marketplace add VSN2015/gem-docs-review

📈 Stats

⚡ Quick try

# Take my developer tools for a spin
brew tap vsn2015/tap && brew install worktree-kit   # per-worktree dev environments
bundle add permittable concerns_on_rails            # Rails gems

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