---

name: new-project-rails description: Creates a new Rails project with personal preferences (RSpec, PostgreSQL, Docker, master branch). Use when the user asks to "create a new Rails project", "start a new Rails app", "new-project-rails", or "/new-project-rails ". allowed-tools: Bash,Read,Write,Edit,AskUserQuestion

New Rails Project

Creates a new Rails project following personal conventions from ~/.claude/NEW-PROJECT-RAILS.md.

Invocation

Copy/new-project-rails                    # Interactive - prompt for project name
/new-project-rails <project-name>     # Create project with specified name

Project Conventions

Workflow

Step 1: Gather Input

Required: Project name

Confidence thresholds:

• Project name provided → proceed (90%)
• No name provided → prompt user

Validation:

• Name should be lowercase, alphanumeric with underscores/hyphens
• Check /opt/ruby/<name> doesn't already exist

Step 2: Determine Versions

Check latest stable versions:

Copy# Latest Ruby
rvm list known | grep -E "^\[ruby-\]" | tail -5

# Latest Rails
gem search ^rails$ --remote | head -1

Confidence thresholds:

• Clear latest stable version → use it (85%)
• Multiple candidates or unclear → suggest and confirm

Step 3: Create Project Structure

Copy# Create and enter directory
mkdir -p /opt/ruby/<project-name>
cd /opt/ruby/<project-name>

# Set Ruby version
rvm install <ruby-version>  # if not already installed
rvm use <ruby-version>
echo "ruby-<version>" > .ruby-version

# Install Rails
gem install rails -v <rails-version>

# Generate project
rails new . --skip-test -d postgresql

Step 4: Configure Testing

Copy# Add RSpec to Gemfile (in :development, :test group)
# The gem line should be added after the group declaration

bundle install
rails generate rspec:install
bundle binstubs rspec-core

Add to Gemfile in :development, :test group:

Copygem 'rspec-rails'

Step 5: Fix Git Branch

Copy# Rename main to master
git branch -m main master

# Fix CI workflow references
sed -i '' 's/branches: \[ main \]/branches: [ master ]/' .github/workflows/ci.yml

Step 6: Update CI Workflow

In .github/workflows/ci.yml:

• Update actions/checkout to latest (v6)
• Update actions/cache to latest (v5)
• Ensure branch references use master

Step 7: Configure .gitignore

Add to .gitignore:

Copy# Ignore Claude Code local settings
/.claude/settings.local.json

Step 8: Create Docker Files

Read templates from ~/.claude/NEW-PROJECT-RAILS.md and create:

1. Dockerfile - Multi-stage build with bind mount support
2. docker-compose.yml - App, worker, postgres services
3. .dockerignore - Exclude dev/test files

Substitute <ruby-version> in Dockerfile.

Step 9: Configure Database

Update config/database.yml default section:

Copydefault: &default
  adapter: postgresql
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  host: <%= ENV.fetch("DATABASE_HOST") { "localhost" } %>
  port: <%= ENV.fetch("DATABASE_PORT") { 55432 } %>
  username: <%= ENV.fetch("DATABASE_USERNAME") { "rails" } %>
  password: <%= ENV.fetch("DATABASE_PASSWORD", nil) %>

Step 10: Create .env Template

Create .env with placeholder:

CopyRAILS_MASTER_KEY=<paste from config/master.key>

Add .env to .gitignore if not already present.

Step 11: Configure Background Jobs (if using worker)

Check if SolidQueue is present. If so, add to config/environments/development.rb:

Copy# Use SolidQueue for background jobs (same as production)
config.active_job.queue_adapter = :solid_queue

Step 12: Update Gems

Copybundle update

Step 13: Verify Setup

Copy# Run specs (should pass - no tests yet)
bin/rspec

# Verify Rails starts
bin/rails server &
sleep 3
curl -s http://localhost:3000 > /dev/null && echo "Rails running OK"
kill %1

Step 14: Report Success

Copy✓ Rails project created successfully

  Project: <project-name>
  Path:    /opt/ruby/<project-name>
  Ruby:    <ruby-version>
  Rails:   <rails-version>

  Next steps:
    cd /opt/ruby/<project-name>

    # Local development:
    bin/rails db:create
    bin/rails server

    # Docker development:
    # First, copy master key to .env:
    cat config/master.key  # copy this value
    # Edit .env and paste as RAILS_MASTER_KEY value
    docker compose up -d

    # Create GitHub repo:
    git add .
    git commit -m "chore: initial Rails <rails-version> project with RSpec"
    gh repo create <username>/<project-name> --public --source=. --push

  Troubleshooting: ~/.claude/NEW-PROJECT-RAILS.md

Error Handling

Templates Reference

All file templates are defined in ~/.claude/NEW-PROJECT-RAILS.md. Read that file to get the exact content for:

• Dockerfile (Step 10)
• docker-compose.yml (Step 10)
• .dockerignore (Step 10)
• database.yml default section (Step 10)

This ensures the skill stays in sync with the guide.