← All skills

rails-upgrade-3-to-4

95 / 100 · Low risk

Fine to try.

By MadBomber/experiments (GitHub) · other · 11 stars · scanned at commit 8139ff6

Upgrade a Ruby on Rails app from 3.x to 4.x — strong parameters replacing attr_accessible / attr_protected, the asset pipeline overhaul, the Turbolinks arrival, Ruby 2.0+ requirement, Bundler-style routes file, the version hop sequence. Use when upgrading legacy Rails 3 apps, the user mentions attr_accessible, Turbolinks, protected_attributes gem, asset pipeline, or asks how to escape Rails 3.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'rails-upgrade-3-to-4' ] || [ -L ~/.agents/skills/'rails-upgrade-3-to-4' ]; then echo 'A skill folder named rails-upgrade-3-to-4 already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/MadBomber/experiments' "$d" && git -C "$d" checkout --quiet '8139ff68e8895b544661aa2ba8b53268d68652bc' -- 'ai_misc/skills/rails-skills/20-rails-upgrade-3-to-4' && mkdir -p ~/.agents/skills && cp -R "$d"/'ai_misc/skills/rails-skills/20-rails-upgrade-3-to-4' ~/.agents/skills/'rails-upgrade-3-to-4' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'rails-upgrade-3-to-4' ~/.claude/skills/'rails-upgrade-3-to-4' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

Badge for your README

The badge for MadBomber/experiments shows the score of its lowest-scoring skill.

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/MadBomber/experiments.svg)](https://zalavijaysinh.github.io/skilltrust/repos/MadBomber/experiments/)

Score history