rails new plugin, see readme for command

merged.gemspec

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+require_relative "lib/merged/version"
+
+Gem::Specification.new do |spec|
+  spec.name        = "merged"
+  spec.version     = Merged::VERSION
+  spec.authors     = ["Torsten"]
+  spec.email       = ["torsten@rubydesign.fi"]
+  spec.homepage    = "TODO"
+  spec.summary     = "TODO: Summary of Merged."
+  spec.description = "TODO: Description of Merged."
+    spec.license     = "MIT"
+  
+  # Prevent pushing this gem to RubyGems.org. To allow pushes either set the "allowed_push_host"
+  # to allow pushing to a single host or delete this section to allow pushing to any host.
+  spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
+
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = "TODO: Put your gem's public repo URL here."
+  spec.metadata["changelog_uri"] = "TODO: Put your gem's CHANGELOG.md URL here."
+
+  spec.files = Dir.chdir(File.expand_path(__dir__)) do
+    Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.md"]
+  end
+
+  spec.add_dependency "rails", ">= 7.0.4"
+end