Claude Code Rails Load Defaults Skill — Development skill for Claude Code

Rails load_defaults Upgrade Skill for Claude Code

A [Claude Code](https://claude.ai/claude-code) skill that incrementally upgrades `config.load_defaults` in Rails applications by walking through each framework default config one at a time.

What It Does

This skill automates the process of bringing a Rails app's `load_defaults` configuration up to match its Rails version. It handles:

• Detection: Identifies the current load_defaults version and Rails version
• Initializer Generation: Creates the new_framework_defaults_X_Y.rb file from templates
• Codebase Analysis: Greps the codebase for each config to recommend the right value
• Iterative Walkthrough: Uncomments one config at a time, waits for you to test/commit
• Consolidation: Removes the initializer, updates load_defaults, and explicitly sets overrides for configs kept at old values

Installation

**From inside the Claude Code CLI prompt (recommended):**

/plugin marketplace add ombulabs/claude-skills
/plugin install rails-load-defaults@ombulabs-ai

**From your terminal:**

claude plugin marketplace add https://github.com/ombulabs/claude-skills.git
claude plugin install rails-load-defaults@ombulabs-ai

**Manual install:**

git clone https://github.com/ombulabs/claude-code_rails-load-defaults-skill.git
cp -r claude-code_rails-load-defaults-skill/rails-load-defaults ~/.claude/skills/

Installing to `~/.claude/skills/` makes it available across all your projects.

[!NOTE] This skill works standalone, but it is part of the full Rails upgrade toolkit. You may also want to install [dual-boot](https://github.com/ombulabs/claude-code_dual-boot-skill) and [rails-upgrade](https://github.com/ombulabs/claude-code_rails-upgrade-skill).

Usage

Once installed, invoke the skill with:

claude /rails-load-defaults

Or start a conversation about load_defaults and Claude will pick it up automatically:

claude "The app is on Rails 7.2 but