From 280dfc2b940af3ab5ec7563e699c9e48066cc2d8 Mon Sep 17 00:00:00 2001
From: "jingyuan.zhao" <jingyuan.zhao@aktsk.jp>
Date: Tue, 23 Dec 2025 01:37:40 +0900
Subject: [PATCH 1/3] Created a dummy app for testing

---
 .github/workflows/ci.yml                      |  38 ++
 .gitignore                                    |   3 +
 .rubocop.yml                                  |  64 ++++
 Appraisals                                    |  13 +
 Gemfile                                       |  14 +
 Gemfile.lock                                  | 228 +++++++++++-
 Rakefile                                      |  12 +
 examples/rails_sample/.gitignore              |  19 +
 examples/rails_sample/README.md               | 106 ++++++
 examples/rails_sample/Rakefile                |   5 +
 .../app/controllers/game_controller.rb        |  82 +++++
 .../app/models/application_master.rb          |  18 +
 .../app/models/application_record.rb          |   6 +
 examples/rails_sample/app/models/armor.rb     |  17 +
 .../app/models/concerns/item_receivable.rb    |  44 +++
 examples/rails_sample/app/models/enemy.rb     |  57 +++
 examples/rails_sample/app/models/level.rb     |  29 ++
 examples/rails_sample/app/models/player.rb    | 251 +++++++++++++
 .../rails_sample/app/models/player_item.rb    |   6 +
 examples/rails_sample/app/models/potion.rb    |  14 +
 examples/rails_sample/app/models/reward.rb    |  23 ++
 examples/rails_sample/app/models/weapon.rb    |  44 +++
 .../rails_sample/app/views/game/show.html.erb | 340 ++++++++++++++++++
 examples/rails_sample/bin/rails               |   6 +
 examples/rails_sample/config.ru               |   5 +
 examples/rails_sample/config/application.rb   |  20 ++
 examples/rails_sample/config/boot.rb          |   5 +
 examples/rails_sample/config/database.yml     |  16 +
 examples/rails_sample/config/environment.rb   |   5 +
 .../config/initializers/simple_master.rb      |  41 +++
 examples/rails_sample/config/routes.rb        |   6 +
 examples/rails_sample/db/schema.rb            |  73 ++++
 .../rails_sample/fixtures/masters/armors.json |   5 +
 .../fixtures/masters/enemies.json             | 122 +++++++
 .../rails_sample/fixtures/masters/levels.json | 112 ++++++
 .../fixtures/masters/potions.json             |  20 ++
 .../fixtures/masters/rewards.json             |  16 +
 .../fixtures/masters/weapons.json             |  46 +++
 .../rails_sample/fixtures/translations.yml    |  17 +
 examples/rails_sample/lib/json_loader.rb      |  30 ++
 examples/rails_sample/spec/enemy_spec.rb      |  43 +++
 .../spec/factories/armor_factory.rb           |   9 +
 .../spec/factories/enemy_factory.rb           |  15 +
 .../spec/factories/gun_factory.rb             |  12 +
 .../spec/factories/level_factory.rb           |  14 +
 .../spec/factories/player_factory.rb          |  13 +
 .../spec/factories/player_item_factory.rb     |  10 +
 .../spec/factories/potion_factory.rb          |   8 +
 .../spec/factories/reward_factory.rb          |   9 +
 .../spec/factories/weapon_factory.rb          |  14 +
 examples/rails_sample/spec/player_spec.rb     | 126 +++++++
 examples/rails_sample/spec/spec_helper.rb     |  43 +++
 gemfiles/rails_7_0.gemfile                    |  21 ++
 gemfiles/rails_7_0.gemfile.lock               | 293 +++++++++++++++
 gemfiles/rails_7_1.gemfile                    |  21 ++
 gemfiles/rails_7_1.gemfile.lock               | 293 +++++++++++++++
 gemfiles/rails_7_2.gemfile                    |  21 ++
 gemfiles/rails_7_2.gemfile.lock               | 293 +++++++++++++++
 gemfiles/rails_8_0.gemfile                    |  21 ++
 gemfiles/rails_8_0.gemfile.lock               | 292 +++++++++++++++
 gemfiles/rails_8_1.gemfile                    |  21 ++
 gemfiles/rails_8_1.gemfile.lock               | 292 +++++++++++++++
 lib/simple_master.rb                          |   1 +
 simple_master.gemspec                         |   2 +-
 .../active_record/extension_spec.rb           |  40 +++
 .../loader/marshal_loader_spec.rb             |  26 ++
 .../simple_master/loader/query_loader_spec.rb |  48 +++
 .../simple_master/master/associations_spec.rb |  40 +++
 spec/simple_master/master/cache_spec.rb       |  38 ++
 spec/simple_master/master/columns_spec.rb     | 172 +++++++++
 spec/simple_master/master/filterable_spec.rb  |  36 ++
 spec/simple_master/master/model_spec.rb       |  57 +++
 spec/simple_master/master/queryable_spec.rb   |  76 ++++
 spec/simple_master/master/validatable_spec.rb |  10 +
 spec/simple_master/storage/dataset_spec.rb    |  28 ++
 spec/simple_master/storage/loader_spec.rb     |  64 ++++
 spec/spec_helper.rb                           |  53 +++
 spec/support/dataset_helper.rb                |  26 ++
 78 files changed, 4568 insertions(+), 11 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 Appraisals
 create mode 100644 Rakefile
 create mode 100644 examples/rails_sample/.gitignore
 create mode 100644 examples/rails_sample/README.md
 create mode 100644 examples/rails_sample/Rakefile
 create mode 100644 examples/rails_sample/app/controllers/game_controller.rb
 create mode 100644 examples/rails_sample/app/models/application_master.rb
 create mode 100644 examples/rails_sample/app/models/application_record.rb
 create mode 100644 examples/rails_sample/app/models/armor.rb
 create mode 100644 examples/rails_sample/app/models/concerns/item_receivable.rb
 create mode 100644 examples/rails_sample/app/models/enemy.rb
 create mode 100644 examples/rails_sample/app/models/level.rb
 create mode 100644 examples/rails_sample/app/models/player.rb
 create mode 100644 examples/rails_sample/app/models/player_item.rb
 create mode 100644 examples/rails_sample/app/models/potion.rb
 create mode 100644 examples/rails_sample/app/models/reward.rb
 create mode 100644 examples/rails_sample/app/models/weapon.rb
 create mode 100644 examples/rails_sample/app/views/game/show.html.erb
 create mode 100755 examples/rails_sample/bin/rails
 create mode 100644 examples/rails_sample/config.ru
 create mode 100644 examples/rails_sample/config/application.rb
 create mode 100644 examples/rails_sample/config/boot.rb
 create mode 100644 examples/rails_sample/config/database.yml
 create mode 100644 examples/rails_sample/config/environment.rb
 create mode 100644 examples/rails_sample/config/initializers/simple_master.rb
 create mode 100644 examples/rails_sample/config/routes.rb
 create mode 100644 examples/rails_sample/db/schema.rb
 create mode 100644 examples/rails_sample/fixtures/masters/armors.json
 create mode 100644 examples/rails_sample/fixtures/masters/enemies.json
 create mode 100644 examples/rails_sample/fixtures/masters/levels.json
 create mode 100644 examples/rails_sample/fixtures/masters/potions.json
 create mode 100644 examples/rails_sample/fixtures/masters/rewards.json
 create mode 100644 examples/rails_sample/fixtures/masters/weapons.json
 create mode 100644 examples/rails_sample/fixtures/translations.yml
 create mode 100644 examples/rails_sample/lib/json_loader.rb
 create mode 100644 examples/rails_sample/spec/enemy_spec.rb
 create mode 100644 examples/rails_sample/spec/factories/armor_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/enemy_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/gun_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/level_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/player_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/player_item_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/potion_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/reward_factory.rb
 create mode 100644 examples/rails_sample/spec/factories/weapon_factory.rb
 create mode 100644 examples/rails_sample/spec/player_spec.rb
 create mode 100644 examples/rails_sample/spec/spec_helper.rb
 create mode 100644 gemfiles/rails_7_0.gemfile
 create mode 100644 gemfiles/rails_7_0.gemfile.lock
 create mode 100644 gemfiles/rails_7_1.gemfile
 create mode 100644 gemfiles/rails_7_1.gemfile.lock
 create mode 100644 gemfiles/rails_7_2.gemfile
 create mode 100644 gemfiles/rails_7_2.gemfile.lock
 create mode 100644 gemfiles/rails_8_0.gemfile
 create mode 100644 gemfiles/rails_8_0.gemfile.lock
 create mode 100644 gemfiles/rails_8_1.gemfile
 create mode 100644 gemfiles/rails_8_1.gemfile.lock
 create mode 100644 spec/simple_master/active_record/extension_spec.rb
 create mode 100644 spec/simple_master/loader/marshal_loader_spec.rb
 create mode 100644 spec/simple_master/loader/query_loader_spec.rb
 create mode 100644 spec/simple_master/master/associations_spec.rb
 create mode 100644 spec/simple_master/master/cache_spec.rb
 create mode 100644 spec/simple_master/master/columns_spec.rb
 create mode 100644 spec/simple_master/master/filterable_spec.rb
 create mode 100644 spec/simple_master/master/model_spec.rb
 create mode 100644 spec/simple_master/master/queryable_spec.rb
 create mode 100644 spec/simple_master/master/validatable_spec.rb
 create mode 100644 spec/simple_master/storage/dataset_spec.rb
 create mode 100644 spec/simple_master/storage/loader_spec.rb
 create mode 100644 spec/spec_helper.rb
 create mode 100644 spec/support/dataset_helper.rb

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4f43c1b..a5569ff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,3 +15,41 @@ jobs:
           bundler-cache: true
       - name: Run RuboCop
         run: bundle exec rubocop
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    env:
+      BUNDLE_PATH: vendor/bundle
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - "3.2"
+          - "3.3"
+          - "3.4"
+        appraisal:
+          - rails-7_0
+          - rails-7_1
+          - rails-7_2
+          - rails-8_0
+          - rails-8_1
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+
+      - name: Install system deps
+        run: sudo apt-get update && sudo apt-get install -y libsqlite3-dev pkg-config
+
+      - name: Install Appraisal gemfiles
+        run: bundle exec appraisal install
+
+      - name: Run specs (${{ matrix.appraisal }})
+        run: bundle exec appraisal ${{ matrix.appraisal }} rspec spec
+
+      - name: Run rails sample specs (${{ matrix.appraisal }})
+        run: bundle exec appraisal ${{ matrix.appraisal }} rake rails_sample_spec
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4f02cc6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/tmp/
+/.bundle/
+/vendor/bundle/
diff --git a/.rubocop.yml b/.rubocop.yml
index 70ade74..0c2a8fd 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,8 +1,14 @@
 AllCops:
   DisplayCopNames: true
   NewCops: enable
+  SuggestExtensions: false
 
 plugins:
+  - rubocop-rspec
+  - rubocop-performance
+  - rubocop-rails
+  - rubocop-rspec_rails
+  - rubocop-factory_bot
 
 ### Lint ###
 Lint/AmbiguousOperatorPrecedence:
@@ -143,3 +149,61 @@ Metrics/ModuleLength:
 
 Metrics/PerceivedComplexity:
   Enabled: false
+
+### Rails ###
+Rails:
+  Enabled: true
+
+Rails/Blank:
+  Enabled: false
+
+Rails/Delegate:
+  Enabled: false
+
+Rails/Output:
+  Enabled: false
+
+Rails/SquishedSQLHeredocs:
+  Enabled: false
+
+Rails/RedundantActiveRecordAllMethod:
+  Enabled: false
+
+Rails/DynamicFindBy:
+  AllowedMethods:
+    - find_by_id
+    - find_by_id!
+    - find_by_ids
+    - find_by_ids!
+
+Rails/InverseOf:
+  Enabled: false
+
+Rails/HasManyOrHasOneDependent:
+  Enabled: false
+
+Rails/I18nLocaleTexts:
+  Enabled: false
+
+Rails/FindEach:
+  Enabled: false
+
+### Performance ###
+Performance/CollectionLiteralInLoop:
+  Enabled: false
+
+### RSpec ###
+RSpec/MultipleExpectations:
+  Enabled: false
+
+RSpec/ExampleLength:
+  Enabled: false
+
+RSpec/DescribeClass:
+  Enabled: false
+
+RSpec/MultipleMemoizedHelpers:
+  Enabled: false
+
+RSpec/LetSetup:
+  Enabled: false
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..b6cf8d4
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+rails_versions = ENV.fetch("RAILS_VERSIONS", "7.0 7.1 7.2 8.0 8.1").split
+
+rails_versions.each do |version|
+  appraise "rails-#{version.tr('.', '_')}" do
+    gem "rails", "~> #{version}"
+    gem "sqlite3", "~> 2.1"
+    gem "rspec"
+    gem "factory_bot"
+    gem "puma"
+  end
+end
diff --git a/Gemfile b/Gemfile
index 2160871..e895375 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,4 +4,18 @@ source "https://rubygems.org"
 
 gemspec
 
+gem "factory_bot", group: :test
+gem "puma", group: :development
+gem "rails", ENV.fetch("RAILS_VERSION", "~> 7.2")
+
+gem "rspec", group: :test
 gem "rubocop", group: :development
+gem 'rubocop-factory_bot', group: :development
+gem 'rubocop-performance', group: :development
+gem 'rubocop-rails', group: :development
+gem 'rubocop-rspec', group: :development
+gem 'rubocop-rspec_rails', group: :development
+gem "sqlite3", "~> 2.1"
+
+gem "appraisal", group: :development
+gem "rake", group: :development
diff --git a/Gemfile.lock b/Gemfile.lock
index a272c17..5cdfdfb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,50 +9,216 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (8.1.1)
-      activesupport (= 8.1.1)
-    activerecord (8.1.1)
-      activemodel (= 8.1.1)
-      activesupport (= 8.1.1)
+    actioncable (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+    actionmailer (7.2.3)
+      actionpack (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (7.2.3)
+      actionview (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      nokogiri (>= 1.8.5)
+      racc
+      rack (>= 2.2.4, < 3.3)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (7.2.3)
+      actionpack (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.2.3)
+      activesupport (= 7.2.3)
+      builder (~> 3.1)
+      cgi
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.3.6)
+    activemodel (7.2.3)
+      activesupport (= 7.2.3)
+    activerecord (7.2.3)
+      activemodel (= 7.2.3)
+      activesupport (= 7.2.3)
       timeout (>= 0.4.0)
-    activesupport (8.1.1)
+    activestorage (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activesupport (= 7.2.3)
+      marcel (~> 1.0)
+    activesupport (7.2.3)
       base64
+      benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
-      json
       logger (>= 1.4.2)
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
-      uri (>= 0.13.1)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
     ast (2.4.3)
     base64 (0.3.0)
+    benchmark (0.5.0)
     bigdecimal (4.0.1)
+    builder (3.3.0)
+    cgi (0.5.1)
     concurrent-ruby (1.3.6)
     connection_pool (3.0.2)
+    crass (1.0.6)
+    date (3.5.1)
+    diff-lcs (1.6.2)
     drb (2.2.3)
-    i18n (1.14.8)
+    erb (6.0.1)
+    erubi (1.13.1)
+    factory_bot (6.5.6)
+      activesupport (>= 6.1.0)
+    globalid (1.3.0)
+      activesupport (>= 6.1)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
     json (2.18.0)
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     logger (1.7.0)
+    loofah (2.25.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.9.0)
+      logger
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.1.0)
+    mini_mime (1.1.5)
     minitest (6.0.0)
       prism (~> 1.5)
+    net-imap (0.6.2)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.5)
+    nokogiri (1.18.10-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.10-x86_64-linux-gnu)
+      racc (~> 1.4)
     parallel (1.27.0)
     parser (3.3.10.0)
       ast (~> 2.4.1)
       racc
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
     prism (1.7.0)
+    psych (5.3.1)
+      date
+      stringio
+    puma (7.1.0)
+      nio4r (~> 2.0)
     racc (1.8.1)
     rack (3.2.4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (7.2.3)
+      actioncable (= 7.2.3)
+      actionmailbox (= 7.2.3)
+      actionmailer (= 7.2.3)
+      actionpack (= 7.2.3)
+      actiontext (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activemodel (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      bundler (>= 1.15.0)
+      railties (= 7.2.3)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
     rainbow (3.1.1)
+    rake (13.3.1)
+    rdoc (7.0.1)
+      erb
+      psych (>= 4.0.0)
+      tsort
     regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
     request_store (1.7.0)
       rack (>= 1.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.6)
     rubocop (1.82.0)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
@@ -67,23 +233,65 @@ GEM
     rubocop-ast (1.48.0)
       parser (>= 3.3.7.2)
       prism (~> 1.4)
+    rubocop-factory_bot (2.28.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-performance (1.26.1)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
+    rubocop-rails (2.34.2)
+      activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
+      rack (>= 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.8.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.81)
+    rubocop-rspec_rails (2.32.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
     ruby-progressbar (1.13.0)
     securerandom (0.4.1)
+    sqlite3 (2.8.1-arm64-darwin)
+    sqlite3 (2.8.1-x86_64-linux-gnu)
+    stringio (3.2.0)
+    thor (1.4.0)
     timeout (0.6.0)
+    tsort (0.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
     unicode-emoji (4.2.0)
-    uri (1.1.1)
+    useragent (0.16.11)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.4)
 
 PLATFORMS
   arm64-darwin-24
   x86_64-linux
 
 DEPENDENCIES
+  appraisal
+  factory_bot
+  puma
+  rails (~> 7.2)
+  rake
+  rspec
   rubocop
+  rubocop-factory_bot
+  rubocop-performance
+  rubocop-rails
+  rubocop-rspec
+  rubocop-rspec_rails
   simple_master!
+  sqlite3 (~> 2.1)
 
 BUNDLED WITH
    2.7.1
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..63bb6d1
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require "bundler/setup"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+RSpec::Core::RakeTask.new(:rails_sample_spec) do |task|
+  task.pattern = "examples/rails_sample/spec/**/*_spec.rb"
+  task.rspec_opts = "--require ./examples/rails_sample/spec/spec_helper --default-path examples/rails_sample/spec"
+end
+
+task default: :spec
diff --git a/examples/rails_sample/.gitignore b/examples/rails_sample/.gitignore
new file mode 100644
index 0000000..f88a268
--- /dev/null
+++ b/examples/rails_sample/.gitignore
@@ -0,0 +1,19 @@
+/log/
+/tmp/
+/db/*.sqlite3
+/db/*.sqlite3-*
+/db/*.sqlite3-journal
+/db/*.sqlite3-wal
+/db/*.sqlite3-shm
+/storage/
+/node_modules/
+/vendor/bundle/
+/.bundle/
+/.byebug_history
+/coverage/
+/public/assets/
+/public/packs/
+/public/packs-test/
+/public/webpack/
+/yarn-error.log
+/npm-debug.log
diff --git a/examples/rails_sample/README.md b/examples/rails_sample/README.md
new file mode 100644
index 0000000..6fe5d94
--- /dev/null
+++ b/examples/rails_sample/README.md
@@ -0,0 +1,106 @@
+# Rails Sample App
+
+This sample app demonstrates SimpleMaster in a compact, game-like domain.
+It is used to exercise column casting and association patterns (STI, polymorphic
+`belongs_to`, `has_many`).
+
+## Development Setup
+```bash
+bundle install
+cd examples/rails_sample
+bundle exec rails db:prepare
+bundle exec rails s
+```
+
+## Database Configuration
+Database settings live in `examples/rails_sample/config/database.yml`.
+
+- `development`: sqlite3 at `examples/rails_sample/db/development.sqlite3`
+- `test`: sqlite3 in-memory (`:memory:`)
+- `production`: sqlite3 at `examples/rails_sample/db/production.sqlite3`
+
+If you need a different DB, edit `config/database.yml` or set `DATABASE_URL`.
+
+## Domain Model
+```
+SimpleMaster (masters)                   ActiveRecord
+
+[Weapon] (STI: Gun, Blade)               [Player] --< player_items >-- (polymorphic to Weapon/Armor/Potion)
+[Armor]                                  PlayerItem: belongs_to :item, polymorphic
+[Potion]
+[Level] --< players (lv) >-- [Player]
+[Enemy] --< rewards >-- [Reward] (reward_type/reward_id -> Weapon/Armor/Potion)
+```
+
+## Masters
+- **Weapon** (`Gun`, `Blade`)
+  - `id`
+  - `type`
+  - `name`
+  - `attack` (float)
+  - `info` (json, symbolize_names: true)
+  - `metadata` (json, symbolize_names: false)
+  - `rarity` (enum)
+  - `flags` (bitmask)
+  - Notes: polymorphic target (PlayerItem, Reward)
+- **Armor**
+  - `id`
+  - `name`
+  - `defence` (float)
+  - Notes: polymorphic target
+- **Potion**
+  - `id`
+  - `name`
+  - `hp` (float)
+  - Notes: polymorphic target
+- **Level**
+  - `id`
+  - `lv` (unique)
+  - `attack` (float)
+  - `defence` (float)
+  - `hp` (float)
+  - Associations: `has_many :players` (lv)
+- **Enemy**
+  - `id`
+  - `name`
+  - `is_boss` (boolean)
+  - `start_at` (time)
+  - `end_at` (time)
+  - `attack`
+  - `defence`
+  - `hp`
+  - Associations: `has_many :rewards`
+- **Reward**
+  - `id`
+  - `enemy_id`
+  - `reward_type`
+  - `reward_id`
+  - Associations: `belongs_to :enemy`; polymorphic `belongs_to` Weapon/Armor/Potion
+
+## ActiveRecord
+- **Player**
+  - `id`
+  - `name`
+  - `lv`
+  - Associations: `belongs_to :level` (lv); `has_many :player_items`; `has_many :items, through: :player_items`
+- **PlayerItem**
+  - `player_id`
+  - `item_type`
+  - `item_id`
+  - Associations: `belongs_to :player`; polymorphic `belongs_to :item`
+
+## Fixtures
+Fixtures live in `examples/rails_sample/fixtures/masters`.
+
+- `weapons.json` (STI Gun/Blade), `armors.json`, `potions.json`, `levels.json` (uses `lv` as unique key),
+  `enemies.json`, `rewards.json`
+- Aim to include representative casts (float/json/globalize where useful) and polymorphic/has_many links.
+
+## Related Specs
+- `simple_master/active_record/extension_spec.rb`: AR↔master (`belongs_to_master`)
+- `simple_master/master/item_spec.rb`: column casting and master associations
+- `simple_master/master/filterable_spec.rb`: find/find_by/all_by/all_in
+- `simple_master/master/cache_spec.rb`: cache_method, cache_class_method
+- `simple_master/storage/loader_spec.rb`: STI instantiation, diff application
+- `simple_master/loader/marshal_loader_spec.rb`: Marshal dump/load roundtrip
+- `simple_master/storage/dataset_spec.rb`: dataset cache/diff duplication
diff --git a/examples/rails_sample/Rakefile b/examples/rails_sample/Rakefile
new file mode 100644
index 0000000..c4f9523
--- /dev/null
+++ b/examples/rails_sample/Rakefile
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require_relative "config/application"
+
+Rails.application.load_tasks
diff --git a/examples/rails_sample/app/controllers/game_controller.rb b/examples/rails_sample/app/controllers/game_controller.rb
new file mode 100644
index 0000000..3f82d94
--- /dev/null
+++ b/examples/rails_sample/app/controllers/game_controller.rb
@@ -0,0 +1,82 @@
+# frozen_string_literal: true
+
+class GameController < ActionController::Base # rubocop:disable Rails/ApplicationController
+  skip_forgery_protection
+
+  def show
+    @player = current_player
+    @now = Time.current
+    @enemies =
+      Enemy.available_at(@now)
+           .sort_by { |enemy| [enemy.is_boss? ? 1 : 0, enemy.attack.to_f + enemy.defence.to_f + enemy.hp.to_f] }
+    @potions = Potion.all
+  end
+
+  def play
+    @player = current_player
+
+    case params[:op]
+    when "create_player"
+      @player = Player.create!(name: player_name, lv: player_level)
+      session[:player_id] = @player.id
+      flash.now[:notice] = "Player created."
+    when "challenge"
+      enemy = Enemy.find_by_id(params[:enemy_id].to_i)
+      if @player && enemy
+        result = @player.challenge_enemy(enemy, at: Time.current)
+        flash[:notice] = battle_message(result)
+      else
+        flash[:notice] = "Missing player or enemy."
+      end
+    when "potion"
+      potion = Potion.find_by_id(params[:potion_id].to_i)
+      flash.now[:notice] = if @player && potion
+                             @player.use_potion(potion, at: Time.current) ? "Healed." : "Potion failed."
+                           else
+                             "Missing player or potion."
+                           end
+    when "equip_weapon"
+      weapon = Weapon.find_by_id(params[:weapon_id].to_i)
+      flash.now[:notice] = if @player && weapon
+                             @player.equip_weapon(weapon) ? "Weapon equipped." : "Cannot equip weapon."
+                           else
+                             "Missing player or weapon."
+                           end
+    when "equip_armor"
+      armor = Armor.find_by_id(params[:armor_id].to_i)
+      flash.now[:notice] = if @player && armor
+                             @player.equip_armor(armor) ? "Armor equipped." : "Cannot equip armor."
+                           else
+                             "Missing player or armor."
+                           end
+    end
+
+    redirect_to root_path
+  end
+
+  private
+
+  def current_player
+    player_id = session[:player_id]
+    return unless player_id
+
+    Player.find_by(id: player_id)
+  end
+
+  def player_name
+    name = params[:name].to_s.strip
+    name.empty? ? "Hero" : name
+  end
+
+  def player_level
+    1
+  end
+
+  def battle_message(result)
+    return "No player." if result.nil?
+    return "Win! Level up." if result[:ok] && result[:leveled_up]
+    return "Win! Rewards #{result[:rewards].size}" if result[:ok]
+
+    "Lost: #{result[:reason]}"
+  end
+end
diff --git a/examples/rails_sample/app/models/application_master.rb b/examples/rails_sample/app/models/application_master.rb
new file mode 100644
index 0000000..26af50c
--- /dev/null
+++ b/examples/rails_sample/app/models/application_master.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class ApplicationMaster < SimpleMaster::Master
+  self.abstract_class = true
+
+  def self.validate_all_records
+    Thread.current[:errors] = {}
+
+    classes = descendants.reject(&:abstract_class).select(&:base_class?)
+    classes.each do |klass|
+      klass.all.each(&:valid?)
+    end
+
+    Thread.current[:errors]
+  ensure
+    Thread.current[:errors] = {}
+  end
+end
diff --git a/examples/rails_sample/app/models/application_record.rb b/examples/rails_sample/app/models/application_record.rb
new file mode 100644
index 0000000..9ada3ce
--- /dev/null
+++ b/examples/rails_sample/app/models/application_record.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+  include SimpleMaster::ActiveRecord::Extension
+end
diff --git a/examples/rails_sample/app/models/armor.rb b/examples/rails_sample/app/models/armor.rb
new file mode 100644
index 0000000..93d89fd
--- /dev/null
+++ b/examples/rails_sample/app/models/armor.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class Armor < ApplicationMaster
+  include ItemReceivable
+
+  def_column :id
+  def_column :icon, type: :string
+  def_column :name, type: :string
+  def_column :defence, type: :float
+
+  validates :name, presence: true
+  validates :defence, numericality: { greater_than_or_equal_to: 0 }
+
+  def self.max_quantity
+    1
+  end
+end
diff --git a/examples/rails_sample/app/models/concerns/item_receivable.rb b/examples/rails_sample/app/models/concerns/item_receivable.rb
new file mode 100644
index 0000000..7f1a57e
--- /dev/null
+++ b/examples/rails_sample/app/models/concerns/item_receivable.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module ItemReceivable
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def max_quantity
+      nil
+    end
+  end
+
+  included do
+    cache_class_method def self.receivable_sources
+      sources = {}
+      Reward.all.each do |reward|
+        reward_item = reward.reward
+
+        klass = reward_item.class
+        while klass <= self
+          array = sources.fetch(reward_item.id) { sources[reward_item.id] = [] }
+          array << reward.enemy
+
+          klass = klass.superclass
+        end
+      end
+
+      sources.each_value do |array|
+        array.uniq!
+        array.freeze
+      end
+
+      sources
+    end
+
+    # This is an example. `self.class.receivable_sources[id]` may work better here.
+    cache_method def receivable_sources
+      self.class.receivable_sources.fetch(id) { [] }
+    end
+  end
+
+  def self.receivable_item?
+    true
+  end
+end
diff --git a/examples/rails_sample/app/models/enemy.rb b/examples/rails_sample/app/models/enemy.rb
new file mode 100644
index 0000000..29dcbac
--- /dev/null
+++ b/examples/rails_sample/app/models/enemy.rb
@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+class Enemy < ApplicationMaster
+  def_column :id
+  def_column :name, type: :string
+  def_column :is_boss, type: :boolean
+  def_column :start_at, type: :time
+  def_column :end_at, type: :time, group_key: true
+  def_column :attack, type: :float
+  def_column :defence, type: :float
+  def_column :hp, type: :float
+  def_column :exp, type: :integer
+  def_column :stamina_cost, type: :integer
+
+  has_many :rewards
+
+  validates :name, presence: true
+  validates :attack, :defence, :hp, numericality: { greater_than_or_equal_to: 0 }
+  validates :exp, :stamina_cost, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
+  validate :end_after_start_at
+
+  cache_class_method def self.sorted_end_ats
+    # end_atを降順でソートした配列
+    [nil, *grouped_hash[:end_at].keys.compact.sort!.reverse!]
+  end
+
+  def self.not_ended(time = Time.current)
+    sorted_end_ats
+      .take_while { |end_at| end_at.nil? || end_at > time }
+      .flat_map { |end_at| all_by(:end_at, end_at) }
+  end
+
+  def self.available_at(time = Time.current)
+    not_ended(time).filter { _1.has_started?(time) }
+  end
+
+  def has_started?(time = Time.current)
+    start_at.nil? || start_at <= time
+  end
+
+  def not_ended?(time = Time.current)
+    end_at.nil? || end_at > time
+  end
+
+  def available?(time = Time.current)
+    has_started?(time) && not_ended?(time)
+  end
+
+  private
+
+  def end_after_start_at
+    return if start_at.nil? || end_at.nil?
+    return if end_at > start_at
+
+    errors.add(:end_at, :invalid)
+  end
+end
diff --git a/examples/rails_sample/app/models/level.rb b/examples/rails_sample/app/models/level.rb
new file mode 100644
index 0000000..5a9406d
--- /dev/null
+++ b/examples/rails_sample/app/models/level.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+class Level < ApplicationMaster
+  def_column :id
+  def_column :lv, type: :integer, group_key: true
+  def_column :attack, type: :float
+  def_column :defence, type: :float
+  def_column :hp, type: :float
+  def_column :next_exp, type: :integer
+  def_column :hp_recovery_sec, type: :integer
+  def_column :stamina, type: :integer
+  def_column :stamina_recovery_sec, type: :integer
+
+  has_many :players, foreign_key: :lv, primary_key: :lv
+
+  validates :lv, presence: true, numericality: { only_integer: true, greater_than: 0 }
+  validates :attack, :defence, :hp, numericality: { greater_than_or_equal_to: 0 }
+  validates :next_exp, :hp_recovery_sec, :stamina, :stamina_recovery_sec,
+            numericality: { only_integer: true, greater_than_or_equal_to: 0 }
+
+  cache_class_method def self.max_lv
+    lvs = all.filter_map(&:lv)
+    lvs.max || 0
+  end
+
+  def self.find_by_lv(lv)
+    find_by(:lv, lv)
+  end
+end
diff --git a/examples/rails_sample/app/models/player.rb b/examples/rails_sample/app/models/player.rb
new file mode 100644
index 0000000..ef734c0
--- /dev/null
+++ b/examples/rails_sample/app/models/player.rb
@@ -0,0 +1,251 @@
+# frozen_string_literal: true
+
+class Player < ApplicationRecord
+  belongs_to :level, foreign_key: :lv, primary_key: :lv
+  belongs_to :weapon
+  belongs_to :armor
+  has_many :player_items
+  has_many :items, through: :player_items
+
+  def items
+    player_items.flat_map do |player_item|
+      quantity = player_item.quantity.to_i
+      next [] if quantity <= 0
+      next [] unless player_item.item
+
+      Array.new(quantity, player_item.item)
+    end
+  end
+
+  def equip_weapon(weapon)
+    return false unless weapon.is_a?(Weapon)
+
+    record = find_item_record(weapon)
+    return false unless record&.quantity.to_i.positive?
+
+    update!(weapon_id: weapon.id)
+    true
+  end
+
+  def equip_armor(armor)
+    return false unless armor.is_a?(Armor)
+
+    record = find_item_record(armor)
+    return false unless record&.quantity.to_i.positive?
+
+    update!(armor_id: armor.id)
+    true
+  end
+
+  def attack_power
+    base = level.attack
+    bonus = (weapon&.attack || 0).to_f
+    base + bonus
+  end
+
+  def defence_power
+    base = level.defence
+    bonus = (armor&.defence || 0).to_f
+    base + bonus
+  end
+
+  def challenge_enemy(enemy, at: Time.current)
+    return { ok: false, reason: :out_of_period } unless enemy.available?(at)
+    player_attack = attack_power
+    return { ok: false, reason: :attack_too_low } if player_attack <= enemy.defence.to_f
+
+    cost = stamina_cost_for(enemy)
+    return { ok: false, reason: :not_enough_stamina } unless consume_stamina(cost, at: at)
+
+    apply_hp_regen!(at)
+
+    player_hp = hp.to_f
+    enemy_hp = enemy.hp.to_f
+    player_damage = scaled_damage(player_attack, enemy.defence.to_f)
+    enemy_damage = scaled_damage(enemy.attack.to_f, defence_power)
+
+    while enemy_hp > 0 && player_hp > 0
+      enemy_hp -= player_damage
+      break if enemy_hp <= 0
+
+      player_hp -= enemy_damage
+    end
+
+    self.hp = [player_hp, 0.0].max
+    self.hp_updated_at = at
+
+    if enemy_hp > 0
+      save!
+      return { ok: false, reason: :defeated }
+    end
+
+    gain_exp(enemy.exp.to_i)
+    rewards = receive_rewards(enemy)
+    leveled_up = consume_exp_for_level_up(at: at)
+    cap_resources!(at)
+    save!
+
+    { ok: true, leveled_up: leveled_up, rewards: rewards }
+  end
+
+  def use_potion(potion, at: Time.current)
+    return false unless potion
+    item_record = find_item_record(potion)
+    return false unless item_record
+
+    apply_hp_regen!(at)
+    heal_amount = potion.hp.to_f
+    return false if heal_amount <= 0
+
+    self.hp = [hp.to_f + heal_amount, max_hp].min
+    self.hp_updated_at = at
+    if item_record.quantity.to_i > 1
+      item_record.update!(quantity: item_record.quantity.to_i - 1)
+    else
+      item_record.destroy!
+    end
+    save!
+    true
+  end
+
+  def current_hp(at: Time.current)
+    max = max_hp
+    return 0.0 if max <= 0.0
+
+    base = hp.nil? ? max : hp
+    last = hp_updated_at || at
+    recovered = recovered_amount(base, max, last, at, level.hp_recovery_sec)
+
+    [base + recovered, max].min
+  end
+
+  def current_stamina(at: Time.current)
+    max = max_stamina
+    return 0 if max <= 0
+
+    base = stamina.nil? ? max : stamina
+    last = stamina_updated_at || at
+    recovered = recovered_amount(base, max, last, at, level.stamina_recovery_sec)
+
+    [(base + recovered).to_i, max].min
+  end
+
+  def max_hp
+    level.hp
+  end
+
+  def max_stamina
+    level.stamina
+  end
+
+  def self.find_by_lv(lv)
+    find_by(lv: lv)
+  end
+
+  private
+
+  def scaled_damage(attack, defence)
+    return 0.0 if attack.to_f <= 0.0
+
+    attack.to_f * 100.0 / (100.0 + defence.to_f)
+  end
+
+  def stamina_cost_for(enemy)
+    [enemy.stamina_cost.to_i, 1].max
+  end
+
+  def apply_hp_regen!(at)
+    self.hp = current_hp(at: at)
+    self.hp_updated_at = at
+  end
+
+  def apply_stamina_regen!(at)
+    self.stamina = current_stamina(at: at)
+    self.stamina_updated_at = at
+  end
+
+  def recovered_amount(base, max, from_time, to_time, recovery_sec)
+    return 0.0 if max <= base
+    interval = recovery_sec.to_i
+    return 0.0 if interval <= 0
+
+    elapsed = (to_time - from_time).to_i
+    return 0.0 if elapsed <= 0
+
+    steps = elapsed / interval
+    [steps.to_f, max - base].min
+  end
+
+  def consume_stamina(cost, at:)
+    apply_stamina_regen!(at)
+    return false if stamina.to_i < cost
+
+    self.stamina = stamina.to_i - cost
+    self.stamina_updated_at = at
+    true
+  end
+
+  def gain_exp(amount)
+    self.exp = exp.to_i + amount
+  end
+
+  def consume_exp_for_level_up(at:)
+    leveled_up = false
+
+    loop do
+      current_level = level
+      required = current_level.next_exp.to_i
+      break if required <= 0
+      break if exp.to_i < required
+
+      next_level = Level.find_by(:lv, lv + 1)
+      break unless next_level
+
+      self.exp = exp.to_i - required
+      self.lv = next_level.lv
+      leveled_up = true
+    end
+
+    if leveled_up
+      self.stamina = max_stamina
+      self.stamina_updated_at = at
+    end
+
+    leveled_up
+  end
+
+  def cap_resources!(at)
+    apply_hp_regen!(at)
+    apply_stamina_regen!(at)
+
+    self.hp = [hp.to_f, max_hp].min if max_hp.positive?
+    self.stamina = [stamina.to_i, max_stamina].min if max_stamina.positive?
+  end
+
+  def receive_rewards(enemy)
+    enemy.rewards.filter_map do |reward|
+      next if reward.reward_type.nil? || reward.reward_id.nil?
+
+      add_item(reward.reward_type, reward.reward_id)
+    end
+  end
+
+  def find_item_record(item)
+    player_items.find_by(item: item)
+  end
+
+  def add_item(item_type, item_id, amount = 1)
+    item_class = item_type.safe_constantize
+    unless item_class && item_class <= ItemReceivable
+      fail ArgumentError, "Unsupported item_type: #{item_type}"
+    end
+
+    record = player_items.find_or_initialize_by(item_type: item_type, item_id: item_id)
+    max_quantity = item_class.max_quantity
+    quantity = record.quantity.to_i + amount
+    quantity = [quantity, max_quantity].min if max_quantity
+    record.quantity = quantity
+    record.save!
+    record
+  end
+end
diff --git a/examples/rails_sample/app/models/player_item.rb b/examples/rails_sample/app/models/player_item.rb
new file mode 100644
index 0000000..b4e058d
--- /dev/null
+++ b/examples/rails_sample/app/models/player_item.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+class PlayerItem < ApplicationRecord
+  belongs_to :player
+  belongs_to :item, polymorphic: true
+end
diff --git a/examples/rails_sample/app/models/potion.rb b/examples/rails_sample/app/models/potion.rb
new file mode 100644
index 0000000..8c05e1f
--- /dev/null
+++ b/examples/rails_sample/app/models/potion.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class Potion < ApplicationMaster
+  include ItemReceivable
+
+  def_column :id
+  def_column :name
+  def_column :hp, type: :float
+
+  globalize :name
+
+  validates :name, presence: true
+  validates :hp, numericality: { greater_than_or_equal_to: 0 }
+end
diff --git a/examples/rails_sample/app/models/reward.rb b/examples/rails_sample/app/models/reward.rb
new file mode 100644
index 0000000..8df4981
--- /dev/null
+++ b/examples/rails_sample/app/models/reward.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class Reward < ApplicationMaster
+  def_column :id
+  def_column :enemy_id, type: :integer, group_key: true
+  def_column :reward_type, polymorphic_type: true, group_key: true
+  def_column :reward_id, type: :integer
+
+  belongs_to :enemy
+  belongs_to :reward, polymorphic: true
+
+  validates :reward_type, presence: true
+  validate :reward_type_receivable
+
+  private
+
+  def reward_type_receivable
+    klass = reward_type.safe_constantize
+    return if klass && klass <= ItemReceivable
+
+    errors.add(:reward_type, :invalid)
+  end
+end
diff --git a/examples/rails_sample/app/models/weapon.rb b/examples/rails_sample/app/models/weapon.rb
new file mode 100644
index 0000000..7a769bd
--- /dev/null
+++ b/examples/rails_sample/app/models/weapon.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+class Weapon < ApplicationMaster
+  include ItemReceivable
+
+  RARITY = {
+    common: 0,
+    rare: 1,
+    epic: 2,
+  }.freeze
+
+  def_column :id
+  def_column :type, sti: true
+  def_column :icon, type: :string
+  def_column :name, type: :string
+  def_column :attack, type: :float
+  def_column :info, type: :json, symbolize_names: true
+  def_column :metadata, type: :json, symbolize_names: false
+  def_column :rarity, type: :integer
+  def_column :flags, type: :integer
+
+  globalize :name
+
+  enum :rarity, RARITY
+  bitmask :flags, as: [:tradeable, :soulbound, :limited]
+
+  validates :name, presence: true
+  validates :attack, numericality: { greater_than_or_equal_to: 0 }
+  validates :rarity, inclusion: { in: RARITY.keys }
+
+  cache_method def cached_signature
+    "#{name}-#{rarity}"
+  end
+
+  def self.max_quantity
+    1
+  end
+end
+
+class Gun < Weapon
+end
+
+class Blade < Weapon
+end
diff --git a/examples/rails_sample/app/views/game/show.html.erb b/examples/rails_sample/app/views/game/show.html.erb
new file mode 100644
index 0000000..0bd9e25
--- /dev/null
+++ b/examples/rails_sample/app/views/game/show.html.erb
@@ -0,0 +1,340 @@
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css">
+<style>
+  @import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600&family=Rock+Salt&display=swap");
+
+  :root {
+    --bg-a: #f6f0e8;
+    --bg-b: #e8f4ff;
+    --bg-c: #fdf6d8;
+    --ink: #1f2937;
+    --muted: #5b6472;
+    --accent: #d4562a;
+    --card: rgba(255, 255, 255, 0.78);
+    --line: rgba(31, 41, 55, 0.12);
+  }
+
+  body {
+    margin: 0;
+    font-family: "Space Grotesk", "Helvetica Neue", Helvetica, Arial, sans-serif;
+    color: var(--ink);
+    background: linear-gradient(135deg, var(--bg-a), var(--bg-b) 50%, var(--bg-c));
+  }
+
+  .screen {
+    max-width: 960px;
+    margin: 36px auto 80px;
+    padding: 0 20px;
+  }
+
+  .top {
+    display: flex;
+    flex-wrap: wrap;
+    align-items: center;
+    justify-content: space-between;
+    gap: 16px;
+    margin-bottom: 24px;
+  }
+
+  h1 {
+    font-family: "Rock Salt", cursive;
+    font-size: 28px;
+    margin: 0 0 6px;
+  }
+
+  h2 {
+    margin: 0 0 12px;
+    font-size: 18px;
+  }
+
+  .notice {
+    padding: 10px 14px;
+    border: 1px solid var(--line);
+    border-radius: 12px;
+    background: var(--card);
+  }
+
+  .grid {
+    display: grid;
+    gap: 16px;
+    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
+    margin-bottom: 22px;
+  }
+  .columns {
+    display: grid;
+    gap: 16px;
+    grid-template-columns: minmax(260px, 1fr) minmax(300px, 1.2fr);
+    align-items: start;
+  }
+  .enemy-card {
+    max-height: 70vh;
+    overflow-y: auto;
+  }
+
+  .card {
+    padding: 16px;
+    border-radius: 16px;
+    border: 1px solid var(--line);
+    background: var(--card);
+    backdrop-filter: blur(6px);
+  }
+
+  .stat {
+    display: flex;
+    justify-content: space-between;
+    margin: 6px 0;
+  }
+  .bar {
+    height: 8px;
+    border-radius: 999px;
+    background: rgba(31, 41, 55, 0.1);
+    overflow: hidden;
+    margin-top: 4px;
+  }
+  .bar > span {
+    display: block;
+    height: 100%;
+    background: linear-gradient(90deg, #d4562a, #ef9b59);
+  }
+
+  .muted {
+    color: var(--muted);
+  }
+
+  form.inline {
+    display: flex;
+    gap: 8px;
+    flex-wrap: wrap;
+    align-items: center;
+  }
+
+  input, button {
+    font: inherit;
+    padding: 8px 10px;
+    border-radius: 10px;
+    border: 1px solid var(--line);
+    background: #fff;
+  }
+
+  button {
+    background: var(--accent);
+    color: #fff;
+    border: none;
+    cursor: pointer;
+  }
+
+  .list {
+    display: grid;
+    gap: 12px;
+  }
+
+  .item-row {
+    display: flex;
+    flex-wrap: wrap;
+    align-items: center;
+    gap: 8px;
+  }
+
+  .icon {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    padding: 2px 8px;
+    border-radius: 999px;
+    background: rgba(31, 41, 55, 0.08);
+    font-size: 11px;
+    min-width: 24px;
+  }
+
+  .pill {
+    display: inline-block;
+    padding: 2px 8px;
+    border-radius: 999px;
+    background: rgba(212, 86, 42, 0.12);
+    color: var(--accent);
+    font-size: 12px;
+    margin-left: 6px;
+  }
+  @media (max-width: 640px) {
+    h1 { font-size: 24px; }
+    .columns { grid-template-columns: 1fr; }
+    .enemy-card { max-height: none; }
+  }
+</style>
+
+<main class="screen">
+  <header class="top">
+    <div>
+      <h1>Dummy Game</h1>
+      <div class="muted">Fight, earn exp, and grab rewards.</div>
+    </div>
+    <form class="inline" action="/play" method="post">
+      <input type="hidden" name="op" value="create_player">
+      <input type="text" name="name" placeholder="Name">
+      <button type="submit">Create Player (Lv 1)</button>
+    </form>
+    <% if flash[:notice] %>
+      <div class="notice"><%= flash[:notice] %></div>
+    <% end %>
+  </header>
+
+  <section class="columns">
+    <div class="card">
+      <h2>Player</h2>
+      <% if @player %>
+        <% equipped_weapon = @player.weapon %>
+        <% equipped_armor = @player.armor %>
+        <% weapon_icon = equipped_weapon&.icon.to_s.strip %>
+        <% armor_icon = equipped_armor&.icon.to_s.strip %>
+        <div class="stat"><span>Name</span><span><%= @player.name %></span></div>
+        <div class="stat"><span>Level</span><span>Lv <%= @player.lv %> (EXP <%= @player.exp %>)</span></div>
+        <div class="stat"><span>ATK / DEF</span><span><%= @player.attack_power %> / <%= @player.defence_power %></span></div>
+        <div class="stat">
+          <span>Weapon</span>
+          <span>
+            <% if equipped_weapon %>
+              <% if weapon_icon != "" %><i class="<%= weapon_icon %>"></i><% end %>
+              <%= equipped_weapon.name %> (ATK +<%= equipped_weapon.attack.to_f %>)
+            <% else %>
+              none
+            <% end %>
+          </span>
+        </div>
+        <div class="stat">
+          <span>Armor</span>
+          <span>
+            <% if equipped_armor %>
+              <% if armor_icon != "" %><i class="<%= armor_icon %>"></i><% end %>
+              <%= equipped_armor.name %> (DEF +<%= equipped_armor.defence.to_f %>)
+            <% else %>
+              none
+            <% end %>
+          </span>
+        </div>
+        <% hp_now = @player.current_hp(at: @now).round(1) %>
+        <% hp_max = @player.max_hp %>
+        <% hp_rate = hp_max.to_f.zero? ? 0 : ((hp_now / hp_max.to_f) * 100).round %>
+        <div class="stat"><span>HP</span><span><%= hp_now %> / <%= hp_max %></span></div>
+        <div class="bar"><span style="width: <%= hp_rate %>%"></span></div>
+        <% st_now = @player.current_stamina(at: @now) %>
+        <% st_max = @player.max_stamina %>
+        <% st_rate = st_max.to_i.zero? ? 0 : ((st_now.to_f / st_max.to_f) * 100).round %>
+        <div class="stat"><span>Stamina</span><span><%= st_now %> / <%= st_max %></span></div>
+        <div class="bar"><span style="width: <%= st_rate %>%"></span></div>
+        <div class="muted">Items:</div>
+        <% if @player.player_items.any? %>
+          <% equipment_items = @player.player_items.select { |pi| pi.item.is_a?(Weapon) || pi.item.is_a?(Armor) } %>
+          <% potion_items = @player.player_items.select { |pi| pi.item.is_a?(Potion) } %>
+          <% other_items = @player.player_items.reject { |pi| pi.item.is_a?(Weapon) || pi.item.is_a?(Armor) || pi.item.is_a?(Potion) } %>
+
+          <div class="list" style="margin-top: 6px;">
+            <% if equipment_items.any? %>
+              <div class="muted">Equipment</div>
+              <% equipment_items.each do |player_item| %>
+                <% item = player_item.item %>
+                <% next unless item %>
+                <% icon_label = item.respond_to?(:icon) ? item.icon.to_s.strip : "" %>
+                <div class="item-row">
+                  <% if icon_label != "" %>
+                    <span class="icon"><i class="<%= icon_label %>"></i></span>
+                  <% end %>
+                  <strong><%= item.name %></strong>
+                  <span class="muted">x<%= player_item.quantity %></span>
+                  <% if item.is_a?(Weapon) %>
+                    <span class="pill">ATK +<%= item.attack.to_f %></span>
+                    <% if @player.weapon_id == item.id %>
+                      <span class="pill">Equipped</span>
+                    <% else %>
+                      <form class="inline" action="/play" method="post">
+                        <input type="hidden" name="op" value="equip_weapon">
+                        <input type="hidden" name="weapon_id" value="<%= item.id %>">
+                        <button type="submit">Equip</button>
+                      </form>
+                    <% end %>
+                  <% elsif item.is_a?(Armor) %>
+                    <span class="pill">DEF +<%= item.defence.to_f %></span>
+                    <% if @player.armor_id == item.id %>
+                      <span class="pill">Equipped</span>
+                    <% else %>
+                      <form class="inline" action="/play" method="post">
+                        <input type="hidden" name="op" value="equip_armor">
+                        <input type="hidden" name="armor_id" value="<%= item.id %>">
+                        <button type="submit">Equip</button>
+                      </form>
+                    <% end %>
+                  <% end %>
+                </div>
+              <% end %>
+            <% end %>
+
+            <% if potion_items.any? %>
+              <div class="muted">Potions</div>
+              <% potion_items.each do |player_item| %>
+                <% item = player_item.item %>
+                <% next unless item %>
+                <div class="item-row">
+                  <strong><%= item.name %></strong>
+                  <span class="muted">x<%= player_item.quantity %></span>
+                  <span class="pill">Potion +<%= item.hp %> HP</span>
+                  <form class="inline" action="/play" method="post">
+                    <input type="hidden" name="op" value="potion">
+                    <input type="hidden" name="potion_id" value="<%= item.id %>">
+                    <button type="submit">Use</button>
+                  </form>
+                </div>
+              <% end %>
+            <% end %>
+
+            <% if other_items.any? %>
+              <div class="muted">Other</div>
+              <% other_items.each do |player_item| %>
+                <% item = player_item.item %>
+                <% next unless item %>
+                <% icon_label = item.respond_to?(:icon) ? item.icon.to_s.strip : "" %>
+                <div class="item-row">
+                  <% if icon_label != "" %>
+                    <span class="icon"><i class="<%= icon_label %>"></i></span>
+                  <% end %>
+                  <strong><%= item.name %></strong>
+                  <span class="muted">x<%= player_item.quantity %></span>
+                </div>
+              <% end %>
+            <% end %>
+          </div>
+        <% else %>
+          <div class="muted">none</div>
+        <% end %>
+      <% else %>
+        <div class="muted">No player yet.</div>
+      <% end %>
+    </div>
+
+    <div class="card enemy-card">
+      <h2>Enemies</h2>
+      <div class="list">
+        <% @enemies.each do |enemy| %>
+          <div>
+            <strong><%= enemy.name %></strong>
+            <% if enemy.is_boss? %>
+              <span class="pill">BOSS</span>
+            <% end %>
+            <span class="pill">EXP <%= enemy.exp.to_i %></span>
+            <div class="muted">ATK <%= enemy.attack %> / DEF <%= enemy.defence %> / HP <%= enemy.hp %> / Stamina <%= enemy.stamina_cost.to_i %></div>
+            <% if enemy.rewards.any? %>
+              <div class="muted">Rewards: <%= enemy.rewards.map { |reward| reward.reward&.name }.compact.join(", ") %></div>
+            <% end %>
+            <% if @player %>
+              <form class="inline" action="/play" method="post">
+                <input type="hidden" name="op" value="challenge">
+                <input type="hidden" name="enemy_id" value="<%= enemy.id %>">
+                <button type="submit">Challenge</button>
+              </form>
+            <% else %>
+              <div class="muted">Create a player to fight.</div>
+            <% end %>
+          </div>
+        <% end %>
+      </div>
+    </div>
+  </section>
+
+</main>
diff --git a/examples/rails_sample/bin/rails b/examples/rails_sample/bin/rails
new file mode 100755
index 0000000..22f2d8d
--- /dev/null
+++ b/examples/rails_sample/bin/rails
@@ -0,0 +1,6 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+APP_PATH = File.expand_path("../config/application", __dir__)
+require_relative "../config/boot"
+require "rails/commands"
diff --git a/examples/rails_sample/config.ru b/examples/rails_sample/config.ru
new file mode 100644
index 0000000..7e804ae
--- /dev/null
+++ b/examples/rails_sample/config.ru
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require_relative "config/environment"
+
+run Rails.application
diff --git a/examples/rails_sample/config/application.rb b/examples/rails_sample/config/application.rb
new file mode 100644
index 0000000..ec826dc
--- /dev/null
+++ b/examples/rails_sample/config/application.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require_relative "boot"
+
+require "rails"
+require "active_record/railtie"
+require "action_controller/railtie"
+require "simple_master"
+
+module Dummy
+  class Application < Rails::Application
+    config.root = File.expand_path("..", __dir__)
+    config.eager_load = false
+    config.logger = Logger.new($stdout)
+    config.logger.level = Logger::WARN
+    config.active_support.test_order = :random
+    config.hosts = nil
+    config.autoload_paths << Rails.root.join("lib")
+  end
+end
diff --git a/examples/rails_sample/config/boot.rb b/examples/rails_sample/config/boot.rb
new file mode 100644
index 0000000..5b865f6
--- /dev/null
+++ b/examples/rails_sample/config/boot.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile", __dir__)
+
+require "bundler/setup"
diff --git a/examples/rails_sample/config/database.yml b/examples/rails_sample/config/database.yml
new file mode 100644
index 0000000..7e9c547
--- /dev/null
+++ b/examples/rails_sample/config/database.yml
@@ -0,0 +1,16 @@
+default: &default
+  adapter: sqlite3
+  pool: 5
+  timeout: 5000
+
+development:
+  <<: *default
+  database: db/development.sqlite3
+
+test:
+  <<: *default
+  database: ":memory:"
+
+production:
+  <<: *default
+  database: db/production.sqlite3
diff --git a/examples/rails_sample/config/environment.rb b/examples/rails_sample/config/environment.rb
new file mode 100644
index 0000000..fe49ece
--- /dev/null
+++ b/examples/rails_sample/config/environment.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require_relative "application"
+
+Dummy::Application.initialize!
diff --git a/examples/rails_sample/config/initializers/simple_master.rb b/examples/rails_sample/config/initializers/simple_master.rb
new file mode 100644
index 0000000..40df7f8
--- /dev/null
+++ b/examples/rails_sample/config/initializers/simple_master.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require "json_loader"
+require "yaml"
+
+Rails.application.config.after_initialize do
+  Rails.application.eager_load!
+
+  SimpleMaster.init(for_test: Rails.env.test?)
+
+  translations =
+    begin
+      YAML.load_file(Rails.root.join("fixtures/translations.yml")) || {}
+    rescue Errno::ENOENT
+      {}
+    end
+
+  globalize_proc = lambda do |klass, records|
+    table_translation = translations[klass.table_name]
+    column_names = klass.all_columns.filter_map { |column| column.name.to_s if column.options[:globalize] }
+    return records if table_translation.blank? || column_names.empty?
+
+    records.map do |record|
+      record_translation = table_translation[record.id]
+      next record unless record_translation
+
+      record = record.dup if record.frozen?
+      column_names.each do |column_name|
+        translation = record_translation[column_name]
+        next unless translation
+
+        record.public_send(:"_globalized_#{column_name}=", translation.symbolize_keys)
+      end
+      record
+    end
+  end
+
+  loader = JsonLoader.new(globalize_proc: globalize_proc)
+  $current_dataset = SimpleMaster::Storage::Dataset.new(loader: loader)
+  $current_dataset.load
+end
diff --git a/examples/rails_sample/config/routes.rb b/examples/rails_sample/config/routes.rb
new file mode 100644
index 0000000..0184269
--- /dev/null
+++ b/examples/rails_sample/config/routes.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+Rails.application.routes.draw do
+  root "game#show"
+  post "/play", to: "game#play"
+end
diff --git a/examples/rails_sample/db/schema.rb b/examples/rails_sample/db/schema.rb
new file mode 100644
index 0000000..b3e0de4
--- /dev/null
+++ b/examples/rails_sample/db/schema.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+ActiveRecord::Schema.define do
+  create_table :weapons, force: true do |t|
+    t.string :type
+    t.string :icon
+    t.string :name
+    t.float :attack
+    t.json :info
+    t.json :metadata
+    t.integer :rarity
+    t.integer :flags
+  end
+
+  create_table :armors, force: true do |t|
+    t.string :icon
+    t.string :name
+    t.float :defence
+  end
+
+  create_table :potions, force: true do |t|
+    t.string :name
+    t.float :hp
+  end
+
+  create_table :levels, force: true do |t|
+    t.integer :lv
+    t.float :attack
+    t.float :defence
+    t.float :hp
+    t.integer :next_exp
+    t.integer :hp_recovery_sec
+    t.integer :stamina
+    t.integer :stamina_recovery_sec
+  end
+
+  create_table :enemies, force: true do |t|
+    t.string :name
+    t.boolean :is_boss
+    t.datetime :start_at
+    t.datetime :end_at
+    t.float :attack
+    t.float :defence
+    t.float :hp
+    t.integer :exp
+    t.integer :stamina_cost
+  end
+
+  create_table :rewards, force: true do |t|
+    t.integer :enemy_id
+    t.string :reward_type
+    t.integer :reward_id
+  end
+
+  create_table :players, force: true do |t|
+    t.string :name, null: false
+    t.integer :lv, null: false
+    t.integer :exp, null: false, default: 0
+    t.integer :weapon_id
+    t.integer :armor_id
+    t.float :hp
+    t.datetime :hp_updated_at
+    t.integer :stamina
+    t.datetime :stamina_updated_at
+  end
+
+  create_table :player_items, force: true do |t|
+    t.integer :player_id, null: false
+    t.string :item_type, null: false
+    t.integer :item_id, null: false
+    t.integer :quantity, null: false, default: 0
+  end
+end
diff --git a/examples/rails_sample/fixtures/masters/armors.json b/examples/rails_sample/fixtures/masters/armors.json
new file mode 100644
index 0000000..a9a6787
--- /dev/null
+++ b/examples/rails_sample/fixtures/masters/armors.json
@@ -0,0 +1,5 @@
+[
+  { "id": 1, "icon": "fa-solid fa-shirt", "name": "Leather Vest", "defence": 5.0 },
+  { "id": 2, "icon": "fa-solid fa-shield-halved", "name": "Chain Mail", "defence": 12.5 },
+  { "id": 3, "icon": "fa-solid fa-shield", "name": "Dragon Plate", "defence": 28.0 }
+]
diff --git a/examples/rails_sample/fixtures/masters/enemies.json b/examples/rails_sample/fixtures/masters/enemies.json
new file mode 100644
index 0000000..dc62ea2
--- /dev/null
+++ b/examples/rails_sample/fixtures/masters/enemies.json
@@ -0,0 +1,122 @@
+[
+  {
+    "id": 1,
+    "name": "Goblin Scout",
+    "is_boss": false,
+    "start_at": "2024-05-01T10:00:00Z",
+    "end_at": "2024-05-01T18:00:00Z",
+    "attack": 5.5,
+    "defence": 2.5,
+    "hp": 18.0,
+    "exp": 8,
+    "stamina_cost": 2
+  },
+  {
+    "id": 2,
+    "name": "Ogre Chief",
+    "is_boss": true,
+    "start_at": "2024-05-02T12:00:00Z",
+    "end_at": "2024-05-02T23:00:00Z",
+    "attack": 14.0,
+    "defence": 8.5,
+    "hp": 52.0,
+    "exp": 26,
+    "stamina_cost": 6
+  },
+  {
+    "id": 3,
+    "name": "Clockwork Rat",
+    "is_boss": false,
+    "start_at": null,
+    "end_at": null,
+    "attack": 3.5,
+    "defence": 1.5,
+    "hp": 12.0,
+    "exp": 5,
+    "stamina_cost": 1
+  },
+  {
+    "id": 4,
+    "name": "Sand Wyrm",
+    "is_boss": false,
+    "start_at": "2020-01-01T00:00:00Z",
+    "end_at": "2030-01-01T00:00:00Z",
+    "attack": 8.5,
+    "defence": 4.0,
+    "hp": 30.0,
+    "exp": 14,
+    "stamina_cost": 3
+  },
+  {
+    "id": 5,
+    "name": "Frost Knight",
+    "is_boss": false,
+    "start_at": null,
+    "end_at": null,
+    "attack": 10.5,
+    "defence": 6.5,
+    "hp": 38.0,
+    "exp": 18,
+    "stamina_cost": 4
+  },
+  {
+    "id": 6,
+    "name": "Moss Golem",
+    "is_boss": false,
+    "start_at": null,
+    "end_at": null,
+    "attack": 7.0,
+    "defence": 4.5,
+    "hp": 26.0,
+    "exp": 12,
+    "stamina_cost": 3
+  },
+  {
+    "id": 7,
+    "name": "Sky Harrier",
+    "is_boss": false,
+    "start_at": "2020-01-01T00:00:00Z",
+    "end_at": "2030-01-01T00:00:00Z",
+    "attack": 4.5,
+    "defence": 2.0,
+    "hp": 14.0,
+    "exp": 6,
+    "stamina_cost": 2
+  },
+  {
+    "id": 8,
+    "name": "Iron Crab",
+    "is_boss": false,
+    "start_at": null,
+    "end_at": null,
+    "attack": 7.5,
+    "defence": 6.0,
+    "hp": 28.0,
+    "exp": 13,
+    "stamina_cost": 3
+  },
+  {
+    "id": 9,
+    "name": "Nightshade",
+    "is_boss": true,
+    "start_at": "2020-01-01T00:00:00Z",
+    "end_at": "2030-01-01T00:00:00Z",
+    "attack": 12.0,
+    "defence": 7.5,
+    "hp": 45.0,
+    "exp": 24,
+    "stamina_cost": 5
+  },
+  {
+    "id": 10,
+    "name": "Ancient Dragon",
+    "is_boss": true,
+    "start_at": null,
+    "end_at": null,
+    "attack": 34.0,
+    "defence": 59.0,
+    "hp": 180.0,
+    "exp": 80,
+    "stamina_cost": 10
+  }
+]
diff --git a/examples/rails_sample/fixtures/masters/levels.json b/examples/rails_sample/fixtures/masters/levels.json
new file mode 100644
index 0000000..05557dd
--- /dev/null
+++ b/examples/rails_sample/fixtures/masters/levels.json
@@ -0,0 +1,112 @@
+[
+  {
+    "id": 1,
+    "lv": 1,
+    "attack": 5.0,
+    "defence": 2.0,
+    "hp": 18.0,
+    "next_exp": 12,
+    "hp_recovery_sec": 55,
+    "stamina": 12,
+    "stamina_recovery_sec": 28
+  },
+  {
+    "id": 2,
+    "lv": 2,
+    "attack": 6.5,
+    "defence": 3.0,
+    "hp": 24.0,
+    "next_exp": 24,
+    "hp_recovery_sec": 50,
+    "stamina": 14,
+    "stamina_recovery_sec": 24
+  },
+  {
+    "id": 3,
+    "lv": 3,
+    "attack": 8.5,
+    "defence": 4.5,
+    "hp": 32.0,
+    "next_exp": 40,
+    "hp_recovery_sec": 45,
+    "stamina": 16,
+    "stamina_recovery_sec": 22
+  },
+  {
+    "id": 4,
+    "lv": 4,
+    "attack": 11.0,
+    "defence": 6.0,
+    "hp": 40.0,
+    "next_exp": 60,
+    "hp_recovery_sec": 40,
+    "stamina": 18,
+    "stamina_recovery_sec": 20
+  },
+  {
+    "id": 5,
+    "lv": 5,
+    "attack": 13.5,
+    "defence": 7.5,
+    "hp": 48.0,
+    "next_exp": 85,
+    "hp_recovery_sec": 36,
+    "stamina": 21,
+    "stamina_recovery_sec": 18
+  },
+  {
+    "id": 6,
+    "lv": 6,
+    "attack": 16.0,
+    "defence": 9.0,
+    "hp": 58.0,
+    "next_exp": 120,
+    "hp_recovery_sec": 32,
+    "stamina": 24,
+    "stamina_recovery_sec": 16
+  },
+  {
+    "id": 7,
+    "lv": 7,
+    "attack": 18.5,
+    "defence": 10.5,
+    "hp": 68.0,
+    "next_exp": 160,
+    "hp_recovery_sec": 28,
+    "stamina": 27,
+    "stamina_recovery_sec": 14
+  },
+  {
+    "id": 8,
+    "lv": 8,
+    "attack": 21.0,
+    "defence": 12.0,
+    "hp": 79.0,
+    "next_exp": 210,
+    "hp_recovery_sec": 24,
+    "stamina": 30,
+    "stamina_recovery_sec": 12
+  },
+  {
+    "id": 9,
+    "lv": 9,
+    "attack": 24.0,
+    "defence": 13.5,
+    "hp": 90.0,
+    "next_exp": 270,
+    "hp_recovery_sec": 21,
+    "stamina": 33,
+    "stamina_recovery_sec": 10
+  },
+  {
+    "id": 10,
+    "lv": 10,
+    "attack": 27.0,
+    "defence": 15.5,
+    "hp": 104.0,
+    "next_exp": 0,
+    "hp_recovery_sec": 18,
+    "stamina": 36,
+    "stamina_recovery_sec": 9
+  }
+]
diff --git a/examples/rails_sample/fixtures/masters/potions.json b/examples/rails_sample/fixtures/masters/potions.json
new file mode 100644
index 0000000..a5d73c0
--- /dev/null
+++ b/examples/rails_sample/fixtures/masters/potions.json
@@ -0,0 +1,20 @@
+[
+  {
+    "id": 1,
+    "name": "Minor Heal",
+    "_globalized_name": "{\"en\":\"Minor Heal\",\"ja\":\"マイナーヒール\"}",
+    "hp": 25.0
+  },
+  {
+    "id": 2,
+    "name": "Major Heal",
+    "_globalized_name": "{\"en\":\"Major Heal\",\"ja\":\"メジャーヒール\"}",
+    "hp": 60.0
+  },
+  {
+    "id": 3,
+    "name": "Elixir",
+    "_globalized_name": "{\"en\":\"Elixir\",\"ja\":\"エリクサー\"}",
+    "hp": 120.0
+  }
+]
diff --git a/examples/rails_sample/fixtures/masters/rewards.json b/examples/rails_sample/fixtures/masters/rewards.json
new file mode 100644
index 0000000..54ebbab
--- /dev/null
+++ b/examples/rails_sample/fixtures/masters/rewards.json
@@ -0,0 +1,16 @@
+[
+  { "id": 1, "enemy_id": 1, "reward_type": "Weapon", "reward_id": 1 },
+  { "id": 2, "enemy_id": 1, "reward_type": "Potion", "reward_id": 1 },
+  { "id": 3, "enemy_id": 2, "reward_type": "Potion", "reward_id": 2 },
+  { "id": 4, "enemy_id": 2, "reward_type": "Weapon", "reward_id": 3 },
+  { "id": 5, "enemy_id": 3, "reward_type": "Potion", "reward_id": 1 },
+  { "id": 6, "enemy_id": 4, "reward_type": "Weapon", "reward_id": 2 },
+  { "id": 7, "enemy_id": 4, "reward_type": "Armor", "reward_id": 2 },
+  { "id": 8, "enemy_id": 5, "reward_type": "Armor", "reward_id": 3 },
+  { "id": 9, "enemy_id": 6, "reward_type": "Potion", "reward_id": 3 },
+  { "id": 10, "enemy_id": 7, "reward_type": "Armor", "reward_id": 1 },
+  { "id": 11, "enemy_id": 8, "reward_type": "Potion", "reward_id": 2 },
+  { "id": 12, "enemy_id": 9, "reward_type": "Weapon", "reward_id": 3 },
+  { "id": 13, "enemy_id": 10, "reward_type": "Weapon", "reward_id": 3 },
+  { "id": 14, "enemy_id": 10, "reward_type": "Potion", "reward_id": 3 }
+]
diff --git a/examples/rails_sample/fixtures/masters/weapons.json b/examples/rails_sample/fixtures/masters/weapons.json
new file mode 100644
index 0000000..e2e2ede
--- /dev/null
+++ b/examples/rails_sample/fixtures/masters/weapons.json
@@ -0,0 +1,46 @@
+[
+  {
+    "id": 1,
+    "type": "Gun",
+    "icon": "fa-solid fa-gun",
+    "name": "Bronze Pistol",
+    "attack": 12.5,
+    "info": "{\"slots\":1,\"origin\":\"forge\"}",
+    "metadata": "{\"source\":\"archive\",\"tags\":[\"starter\",\"event\"],\"stats\":{\"calibration\":0.92,\"batch\":\"A1\"},\"notes\":\"legacy\"}",
+    "rarity": "common",
+    "flags": 1
+  },
+  {
+    "id": 2,
+    "type": "Blade",
+    "icon": "fa-solid fa-sword",
+    "name": "Silver Saber",
+    "attack": 20.0,
+    "info": "{\"slots\":2,\"element\":\"wind\"}",
+    "metadata": "{\"source\":\"drop\",\"tags\":[\"mid\",\"wind\"],\"tuning\":{\"sharpness\":7,\"balance\":0.4},\"deprecated\":false}",
+    "rarity": "rare",
+    "flags": 3
+  },
+  {
+    "id": 3,
+    "type": "Gun",
+    "icon": "fa-solid fa-crosshairs",
+    "name": "Crimson Rifle",
+    "attack": 35.75,
+    "info": "{\"slots\":3,\"element\":\"fire\"}",
+    "metadata": "{\"source\":\"boss\",\"tags\":[\"rare\",\"fire\"],\"mods\":[{\"name\":\"burst\",\"level\":2},{\"name\":\"overheat\",\"level\":1}],\"extra\":null}",
+    "rarity": "epic",
+    "flags": 6
+  },
+  {
+    "id": 4,
+    "type": "Blade",
+    "icon": "fa-solid fa-bolt",
+    "name": "Storm Edge",
+    "attack": 28.0,
+    "info": "{\"slots\":2,\"element\":\"lightning\"}",
+    "metadata": "{\"source\":\"event\",\"tags\":[\"storm\",\"limited\"],\"tuning\":{\"sharpness\":8,\"balance\":0.6},\"deprecated\":false}",
+    "rarity": "rare",
+    "flags": 5
+  }
+]
diff --git a/examples/rails_sample/fixtures/translations.yml b/examples/rails_sample/fixtures/translations.yml
new file mode 100644
index 0000000..6a690cd
--- /dev/null
+++ b/examples/rails_sample/fixtures/translations.yml
@@ -0,0 +1,17 @@
+weapons:
+  1:
+    name:
+      en: "Bronze Pistol"
+      ja: "ブロンズピストル"
+  2:
+    name:
+      en: "Silver Saber"
+      ja: "シルバーセイバー"
+  3:
+    name:
+      en: "Crimson Rifle"
+      ja: "クリムゾンライフル"
+  4:
+    name:
+      en: "Storm Edge"
+      ja: "ストームエッジ"
diff --git a/examples/rails_sample/lib/json_loader.rb b/examples/rails_sample/lib/json_loader.rb
new file mode 100644
index 0000000..4777c6f
--- /dev/null
+++ b/examples/rails_sample/lib/json_loader.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require "json"
+
+# Loads master data from JSON files under examples/rails_sample/fixtures/masters/<table>.json
+class JsonLoader < SimpleMaster::Loader
+  FIXTURE_DIR = File.expand_path("../fixtures/masters", __dir__)
+
+  def read_raw(table)
+    path = File.join(FIXTURE_DIR, "#{table.klass.table_name}.json")
+    File.read(path)
+  end
+
+  def build_records(klass, raw)
+    record_hashes = JSON.parse(raw)
+
+    if klass.sti_class?
+      sti_column_name = klass.sti_column.to_s
+
+      record_hashes.map do |record_hash|
+        sti_klass = record_hash[sti_column_name].constantize
+        sti_klass.new(record_hash)
+      end
+    else
+      record_hashes.map do |record_hash|
+        klass.new(record_hash)
+      end
+    end
+  end
+end
diff --git a/examples/rails_sample/spec/enemy_spec.rb b/examples/rails_sample/spec/enemy_spec.rb
new file mode 100644
index 0000000..fdf499f
--- /dev/null
+++ b/examples/rails_sample/spec/enemy_spec.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+require_relative "spec_helper"
+
+RSpec.describe Enemy do
+  describe "availability" do
+    let!(:now) { Time.current }
+    let(:within_window) { now }
+    let(:before_window) { now - 2.hours }
+    let(:after_window) { now + 2.hours }
+    let!(:bounded_enemy) do
+      create(:enemy, name: "Bounded Enemy", start_at: now - 1.hour, end_at: now + 1.hour)
+    end
+    let!(:timeless_enemy) do
+      create(:enemy, name: "Unbounded Enemy", start_at: nil, end_at: nil)
+    end
+
+    it "checks availability per enemy" do
+      expect(bounded_enemy.available?(within_window)).to be(true)
+      expect(bounded_enemy.available?(before_window)).to be(false)
+      expect(bounded_enemy.available?(after_window)).to be(false)
+      expect(timeless_enemy.available?(within_window)).to be(true)
+      expect(timeless_enemy.available?(before_window)).to be(true)
+      expect(timeless_enemy.available?(after_window)).to be(true)
+    end
+
+    it "filters enemies available at the time" do
+      enemies = described_class.available_at(within_window)
+
+      expect(enemies).to include(bounded_enemy, timeless_enemy)
+
+      earlier_enemies = described_class.available_at(before_window)
+
+      expect(earlier_enemies).to include(timeless_enemy)
+      expect(earlier_enemies).not_to include(bounded_enemy)
+
+      later_enemies = described_class.available_at(after_window)
+
+      expect(later_enemies).to include(timeless_enemy)
+      expect(later_enemies).not_to include(bounded_enemy)
+    end
+  end
+end
diff --git a/examples/rails_sample/spec/factories/armor_factory.rb b/examples/rails_sample/spec/factories/armor_factory.rb
new file mode 100644
index 0000000..de72fe9
--- /dev/null
+++ b/examples/rails_sample/spec/factories/armor_factory.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :armor do
+    icon { "fa-solid fa-shield" }
+    name { "Factory Armor" }
+    defence { 8.0 }
+  end
+end
diff --git a/examples/rails_sample/spec/factories/enemy_factory.rb b/examples/rails_sample/spec/factories/enemy_factory.rb
new file mode 100644
index 0000000..da42315
--- /dev/null
+++ b/examples/rails_sample/spec/factories/enemy_factory.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :enemy do
+    name { "Factory Enemy" }
+    is_boss { false }
+    start_at { Time.utc(2024, 5, 1, 10, 0, 0) }
+    end_at { Time.utc(2024, 5, 1, 18, 0, 0) }
+    attack { 6.0 }
+    defence { 3.0 }
+    hp { 18.0 }
+    exp { 8 }
+    stamina_cost { 2 }
+  end
+end
diff --git a/examples/rails_sample/spec/factories/gun_factory.rb b/examples/rails_sample/spec/factories/gun_factory.rb
new file mode 100644
index 0000000..c4f7cec
--- /dev/null
+++ b/examples/rails_sample/spec/factories/gun_factory.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :gun, class: "Gun" do
+    name { "Factory Gun" }
+    attack { 12.0 }
+    info { { slots: 2, origin: "factory" } }
+    metadata { { "source" => "factory", "tags" => ["gun"] } }
+    rarity { :rare }
+    flags { [:tradeable, :limited] }
+  end
+end
diff --git a/examples/rails_sample/spec/factories/level_factory.rb b/examples/rails_sample/spec/factories/level_factory.rb
new file mode 100644
index 0000000..daab7ad
--- /dev/null
+++ b/examples/rails_sample/spec/factories/level_factory.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :level do
+    lv { 1 }
+    attack { 2.0 }
+    defence { 1.0 }
+    hp { 10.0 }
+    next_exp { 10 }
+    hp_recovery_sec { 60 }
+    stamina { 10 }
+    stamina_recovery_sec { 30 }
+  end
+end
diff --git a/examples/rails_sample/spec/factories/player_factory.rb b/examples/rails_sample/spec/factories/player_factory.rb
new file mode 100644
index 0000000..185b8e3
--- /dev/null
+++ b/examples/rails_sample/spec/factories/player_factory.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :player do
+    name { "Factory Player" }
+    lv { 1 }
+    association :level, strategy: :build
+
+    after(:build) do |player, evaluator|
+      player.level = build(:level, lv: evaluator.lv)
+    end
+  end
+end
diff --git a/examples/rails_sample/spec/factories/player_item_factory.rb b/examples/rails_sample/spec/factories/player_item_factory.rb
new file mode 100644
index 0000000..033076d
--- /dev/null
+++ b/examples/rails_sample/spec/factories/player_item_factory.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :player_item do
+    association :player, strategy: :build
+    item_type { "Weapon" }
+    item_id { 1 }
+    quantity { 1 }
+  end
+end
diff --git a/examples/rails_sample/spec/factories/potion_factory.rb b/examples/rails_sample/spec/factories/potion_factory.rb
new file mode 100644
index 0000000..927e4ee
--- /dev/null
+++ b/examples/rails_sample/spec/factories/potion_factory.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :potion do
+    name { "Factory Potion" }
+    hp { 25.0 }
+  end
+end
diff --git a/examples/rails_sample/spec/factories/reward_factory.rb b/examples/rails_sample/spec/factories/reward_factory.rb
new file mode 100644
index 0000000..ae2ebfd
--- /dev/null
+++ b/examples/rails_sample/spec/factories/reward_factory.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :reward do
+    enemy_id { 1 }
+    association :enemy, strategy: :build
+    association :reward, factory: :weapon, strategy: :build
+  end
+end
diff --git a/examples/rails_sample/spec/factories/weapon_factory.rb b/examples/rails_sample/spec/factories/weapon_factory.rb
new file mode 100644
index 0000000..6591c23
--- /dev/null
+++ b/examples/rails_sample/spec/factories/weapon_factory.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :weapon do
+    type { "Gun" }
+    icon { "fa-solid fa-gun" }
+    name { "Factory Weapon" }
+    attack { 10.0 }
+    info { { slots: 1, origin: "factory" } }
+    metadata { { "source" => "factory", "tags" => ["default"] } }
+    rarity { :common }
+    flags { [:tradeable] }
+  end
+end
diff --git a/examples/rails_sample/spec/player_spec.rb b/examples/rails_sample/spec/player_spec.rb
new file mode 100644
index 0000000..32317f8
--- /dev/null
+++ b/examples/rails_sample/spec/player_spec.rb
@@ -0,0 +1,126 @@
+# frozen_string_literal: true
+
+require_relative "spec_helper"
+
+RSpec.describe Player do
+  before do
+    PlayerItem.delete_all
+    described_class.delete_all
+  end
+
+  describe "creation" do
+    context "when creating a player" do
+      let!(:level1) do
+        create(:level, lv: 1, attack: 5.0, defence: 2.0, hp: 18.0, next_exp: 10, hp_recovery_sec: 60, stamina: 5, stamina_recovery_sec: 30)
+      end
+      let!(:player) { described_class.create!(name: "Nova", lv: level1.lv) }
+
+      it "creates a player with the matching level" do
+        expect(player).to be_a(described_class)
+        expect(player.level).to be_a(Level)
+        expect(player.exp).to eq(0)
+      end
+    end
+  end
+
+  describe "#challenge_enemy" do
+    context "when the player wins" do
+      let!(:now) { Time.current }
+      let!(:battle_enemy) do
+        create(:enemy, name: "Clockwork Rat", start_at: now - 1.hour, end_at: now + 1.hour, attack: 7.0, defence: 3.0, hp: 10.0, exp: 12, stamina_cost: 4)
+      end
+      let!(:battle_level_one) do
+        create(:level, lv: 1, attack: 8.0, defence: 2.0, hp: 20.0, next_exp: 10, hp_recovery_sec: 60, stamina: 6, stamina_recovery_sec: 30)
+      end
+      let!(:battle_level_two) do
+        create(:level, lv: 2, attack: 12.0, defence: 4.0, hp: 26.0, next_exp: 20, hp_recovery_sec: 50, stamina: 8, stamina_recovery_sec: 25)
+      end
+      let!(:battle_reward) { create(:weapon, name: "Victory Blade") }
+      let!(:battle_reward_entry) do
+        create(:reward, enemy_id: battle_enemy.id, reward_type: "Weapon", reward_id: battle_reward.id)
+      end
+      let!(:battle_player) { described_class.create!(name: "Raider", lv: 1) }
+      let!(:existing_item) do
+        create(:player_item, player: battle_player, item_type: "Weapon", item_id: battle_reward.id, quantity: 1)
+      end
+
+      it "levels up and receives rewards after a win" do
+        result = battle_player.challenge_enemy(battle_enemy, at: now)
+
+        expect(result[:ok]).to be(true)
+        expect(battle_player.reload.lv).to eq(2)
+        expect(battle_player.exp).to eq(2)
+        expect(battle_player.hp).to be_within(0.01).of(13.1373)
+        expect(battle_player.stamina).to eq(8)
+        expect(battle_player.items.map(&:id)).to include(battle_reward.id)
+        expect(battle_player.player_items.find_by(item_type: "Weapon", item_id: battle_reward.id).quantity).to eq(1)
+      end
+    end
+
+    context "when the player loses" do
+      let!(:now) { Time.current }
+      let!(:battle_enemy) do
+        create(:enemy, name: "Stone Golem", start_at: now - 1.hour, end_at: now + 1.hour, attack: 5.0, defence: 50.0, hp: 30.0, exp: 1, stamina_cost: 1)
+      end
+      let!(:battle_level_one) do
+        create(:level, lv: 1, attack: 3.0, defence: 1.0, hp: 12.0, next_exp: 10, hp_recovery_sec: 60, stamina: 4, stamina_recovery_sec: 30)
+      end
+      let!(:battle_player) { described_class.create!(name: "Hero", lv: 1) }
+
+      it "fails with an attack_too_low reason" do
+        result = battle_player.challenge_enemy(battle_enemy, at: now)
+
+        expect(result[:ok]).to be(false)
+        expect(result[:reason]).to eq(:attack_too_low)
+        expect(battle_player.reload.lv).to eq(1)
+      end
+    end
+  end
+
+  describe "#use_potion" do
+    context "when a potion is used" do
+      let!(:now) { Time.current }
+      let!(:potion_level) do
+        create(:level, lv: 1, attack: 5.0, defence: 2.0, hp: 18.0, next_exp: 10, hp_recovery_sec: 60, stamina: 5, stamina_recovery_sec: 30)
+      end
+      let!(:potion) { create(:potion, hp: 8.0) }
+      let!(:healing_player) { described_class.create!(name: "Cleric", lv: 1, hp: 6.0, hp_updated_at: now) }
+      let!(:potion_item) { create(:player_item, player: healing_player, item_type: "Potion", item_id: potion.id, quantity: 1) }
+
+      it "heals instantly with a potion" do
+        expect(healing_player.use_potion(potion, at: now)).to be(true)
+        expect(healing_player.reload.hp).to eq(14.0)
+        expect(healing_player.player_items.where(item_type: "Potion", item_id: potion.id)).to be_empty
+      end
+    end
+  end
+
+  describe "equipment" do
+    context "when equipping a weapon" do
+      let!(:level1) do
+        create(:level, lv: 1, attack: 5.0, defence: 2.0, hp: 18.0, next_exp: 10, hp_recovery_sec: 60, stamina: 5, stamina_recovery_sec: 30)
+      end
+      let!(:weapon) { create(:weapon, name: "Starter Gun") }
+      let!(:player) { described_class.create!(name: "Hero", lv: 1) }
+      let!(:player_item) { create(:player_item, player: player, item_type: "Weapon", item_id: weapon.id, quantity: 1) }
+
+      it "equips the weapon" do
+        expect(player.equip_weapon(weapon)).to be(true)
+        expect(player.reload.weapon_id).to eq(weapon.id)
+      end
+    end
+
+    context "when equipping armor without owning it" do
+      let!(:level1) do
+        create(:level, lv: 1, attack: 5.0, defence: 2.0, hp: 18.0, next_exp: 10, hp_recovery_sec: 60, stamina: 5, stamina_recovery_sec: 30)
+      end
+      let!(:armor) { create(:armor, name: "Starter Armor") }
+      let!(:player) { described_class.create!(name: "Hero", lv: 1) }
+
+      it "rejects equipping armor" do
+        expect(player.equip_armor(armor)).to be(false)
+        expect(player.reload.armor_id).to be_nil
+      end
+    end
+  end
+end
diff --git a/examples/rails_sample/spec/spec_helper.rb b/examples/rails_sample/spec/spec_helper.rb
new file mode 100644
index 0000000..e2c1417
--- /dev/null
+++ b/examples/rails_sample/spec/spec_helper.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+ENV["RAILS_ENV"] = "test"
+ENV["DATABASE_URL"] ||= "sqlite3::memory:"
+
+require "bundler/setup"
+require "rspec"
+require "rails"
+require "active_record/railtie"
+require "active_support/time"
+require "factory_bot"
+require "logger"
+require "simple_master"
+
+require_relative "../config/environment"
+
+ApplicationMaster.prepend(SimpleMaster::Master::Editable)
+
+ActiveRecord::Base.establish_connection(:test)
+ActiveRecord::Base.logger = Rails.logger
+ActiveRecord::Base.logger.level = Logger::WARN
+ActiveRecord::Migration.verbose = false
+
+load File.expand_path("../db/schema.rb", __dir__)
+FactoryBot.definition_file_paths = [
+  File.expand_path("factories", __dir__),
+]
+FactoryBot.find_definitions
+
+RSpec.configure do |config|
+  config.order = :random
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+  config.include FactoryBot::Syntax::Methods
+  config.around do |example|
+    dataset = SimpleMaster::Storage::Dataset.new(table_class: SimpleMaster::Storage::TestTable)
+    SimpleMaster.use_dataset(dataset) do
+      example.run
+    end
+    RequestStore.clear!
+  end
+end
diff --git a/gemfiles/rails_7_0.gemfile b/gemfiles/rails_7_0.gemfile
new file mode 100644
index 0000000..be65741
--- /dev/null
+++ b/gemfiles/rails_7_0.gemfile
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", group: :development
+gem "factory_bot"
+gem "puma"
+gem "rails", "~> 7.0"
+gem "rake", group: :development
+gem "rspec"
+gem "rubocop", group: :development
+gem "rubocop-factory_bot", group: :development
+gem "rubocop-performance", group: :development
+gem "rubocop-rails", group: :development
+gem "rubocop-rspec", group: :development
+gem "rubocop-rspec_rails", group: :development
+gem "sqlite3", "~> 2.1"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7_0.gemfile.lock b/gemfiles/rails_7_0.gemfile.lock
new file mode 100644
index 0000000..bd69f57
--- /dev/null
+++ b/gemfiles/rails_7_0.gemfile.lock
@@ -0,0 +1,293 @@
+PATH
+  remote: ..
+  specs:
+    simple_master (0.1.0)
+      activerecord (>= 7.0)
+      activesupport (>= 7.0)
+      request_store (>= 1.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+    actionmailer (7.2.3)
+      actionpack (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (7.2.3)
+      actionview (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      nokogiri (>= 1.8.5)
+      racc
+      rack (>= 2.2.4, < 3.3)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (7.2.3)
+      actionpack (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.2.3)
+      activesupport (= 7.2.3)
+      builder (~> 3.1)
+      cgi
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.3.6)
+    activemodel (7.2.3)
+      activesupport (= 7.2.3)
+    activerecord (7.2.3)
+      activemodel (= 7.2.3)
+      activesupport (= 7.2.3)
+      timeout (>= 0.4.0)
+    activestorage (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activesupport (= 7.2.3)
+      marcel (~> 1.0)
+    activesupport (7.2.3)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.3)
+    base64 (0.3.0)
+    benchmark (0.5.0)
+    bigdecimal (4.0.1)
+    builder (3.3.0)
+    cgi (0.5.1)
+    concurrent-ruby (1.3.6)
+    connection_pool (3.0.2)
+    crass (1.0.6)
+    date (3.5.1)
+    diff-lcs (1.6.2)
+    drb (2.2.3)
+    erb (6.0.1)
+    erubi (1.13.1)
+    factory_bot (6.5.6)
+      activesupport (>= 6.1.0)
+    globalid (1.3.0)
+      activesupport (>= 6.1)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.18.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    loofah (2.25.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.9.0)
+      logger
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.1.0)
+    mini_mime (1.1.5)
+    minitest (6.0.0)
+      prism (~> 1.5)
+    net-imap (0.6.2)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.5)
+    nokogiri (1.18.10-arm64-darwin)
+      racc (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.10.0)
+      ast (~> 2.4.1)
+      racc
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
+    prism (1.7.0)
+    psych (5.3.1)
+      date
+      stringio
+    puma (7.1.0)
+      nio4r (~> 2.0)
+    racc (1.8.1)
+    rack (3.2.4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (7.2.3)
+      actioncable (= 7.2.3)
+      actionmailbox (= 7.2.3)
+      actionmailer (= 7.2.3)
+      actionpack (= 7.2.3)
+      actiontext (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activemodel (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      bundler (>= 1.15.0)
+      railties (= 7.2.3)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
+    rainbow (3.1.1)
+    rake (13.3.1)
+    rdoc (7.0.1)
+      erb
+      psych (>= 4.0.0)
+      tsort
+    regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
+    request_store (1.7.0)
+      rack (>= 1.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.6)
+    rubocop (1.82.1)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.48.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.48.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-factory_bot (2.28.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-performance (1.26.1)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
+    rubocop-rails (2.34.2)
+      activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
+      rack (>= 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.8.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.81)
+    rubocop-rspec_rails (2.32.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
+    ruby-progressbar (1.13.0)
+    securerandom (0.4.1)
+    sqlite3 (2.8.1-arm64-darwin)
+    stringio (3.2.0)
+    thor (1.4.0)
+    timeout (0.6.0)
+    tsort (0.2.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    useragent (0.16.11)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.4)
+
+PLATFORMS
+  arm64-darwin-24
+
+DEPENDENCIES
+  appraisal
+  factory_bot
+  puma
+  rails (~> 7.0)
+  rake
+  rspec
+  rubocop
+  rubocop-factory_bot
+  rubocop-performance
+  rubocop-rails
+  rubocop-rspec
+  rubocop-rspec_rails
+  simple_master!
+  sqlite3 (~> 2.1)
+
+BUNDLED WITH
+   2.7.1
diff --git a/gemfiles/rails_7_1.gemfile b/gemfiles/rails_7_1.gemfile
new file mode 100644
index 0000000..bf2a088
--- /dev/null
+++ b/gemfiles/rails_7_1.gemfile
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", group: :development
+gem "factory_bot"
+gem "puma"
+gem "rails", "~> 7.1"
+gem "rake", group: :development
+gem "rspec"
+gem "rubocop", group: :development
+gem "rubocop-factory_bot", group: :development
+gem "rubocop-performance", group: :development
+gem "rubocop-rails", group: :development
+gem "rubocop-rspec", group: :development
+gem "rubocop-rspec_rails", group: :development
+gem "sqlite3", "~> 2.1"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7_1.gemfile.lock b/gemfiles/rails_7_1.gemfile.lock
new file mode 100644
index 0000000..1d2dcdf
--- /dev/null
+++ b/gemfiles/rails_7_1.gemfile.lock
@@ -0,0 +1,293 @@
+PATH
+  remote: ..
+  specs:
+    simple_master (0.1.0)
+      activerecord (>= 7.0)
+      activesupport (>= 7.0)
+      request_store (>= 1.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+    actionmailer (7.2.3)
+      actionpack (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (7.2.3)
+      actionview (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      nokogiri (>= 1.8.5)
+      racc
+      rack (>= 2.2.4, < 3.3)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (7.2.3)
+      actionpack (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.2.3)
+      activesupport (= 7.2.3)
+      builder (~> 3.1)
+      cgi
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.3.6)
+    activemodel (7.2.3)
+      activesupport (= 7.2.3)
+    activerecord (7.2.3)
+      activemodel (= 7.2.3)
+      activesupport (= 7.2.3)
+      timeout (>= 0.4.0)
+    activestorage (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activesupport (= 7.2.3)
+      marcel (~> 1.0)
+    activesupport (7.2.3)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.3)
+    base64 (0.3.0)
+    benchmark (0.5.0)
+    bigdecimal (4.0.1)
+    builder (3.3.0)
+    cgi (0.5.1)
+    concurrent-ruby (1.3.6)
+    connection_pool (3.0.2)
+    crass (1.0.6)
+    date (3.5.1)
+    diff-lcs (1.6.2)
+    drb (2.2.3)
+    erb (6.0.1)
+    erubi (1.13.1)
+    factory_bot (6.5.6)
+      activesupport (>= 6.1.0)
+    globalid (1.3.0)
+      activesupport (>= 6.1)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.18.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    loofah (2.25.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.9.0)
+      logger
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.1.0)
+    mini_mime (1.1.5)
+    minitest (6.0.0)
+      prism (~> 1.5)
+    net-imap (0.6.2)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.5)
+    nokogiri (1.18.10-arm64-darwin)
+      racc (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.10.0)
+      ast (~> 2.4.1)
+      racc
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
+    prism (1.7.0)
+    psych (5.3.1)
+      date
+      stringio
+    puma (7.1.0)
+      nio4r (~> 2.0)
+    racc (1.8.1)
+    rack (3.2.4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (7.2.3)
+      actioncable (= 7.2.3)
+      actionmailbox (= 7.2.3)
+      actionmailer (= 7.2.3)
+      actionpack (= 7.2.3)
+      actiontext (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activemodel (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      bundler (>= 1.15.0)
+      railties (= 7.2.3)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
+    rainbow (3.1.1)
+    rake (13.3.1)
+    rdoc (7.0.1)
+      erb
+      psych (>= 4.0.0)
+      tsort
+    regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
+    request_store (1.7.0)
+      rack (>= 1.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.6)
+    rubocop (1.82.1)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.48.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.48.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-factory_bot (2.28.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-performance (1.26.1)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
+    rubocop-rails (2.34.2)
+      activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
+      rack (>= 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.8.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.81)
+    rubocop-rspec_rails (2.32.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
+    ruby-progressbar (1.13.0)
+    securerandom (0.4.1)
+    sqlite3 (2.8.1-arm64-darwin)
+    stringio (3.2.0)
+    thor (1.4.0)
+    timeout (0.6.0)
+    tsort (0.2.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    useragent (0.16.11)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.4)
+
+PLATFORMS
+  arm64-darwin-24
+
+DEPENDENCIES
+  appraisal
+  factory_bot
+  puma
+  rails (~> 7.1)
+  rake
+  rspec
+  rubocop
+  rubocop-factory_bot
+  rubocop-performance
+  rubocop-rails
+  rubocop-rspec
+  rubocop-rspec_rails
+  simple_master!
+  sqlite3 (~> 2.1)
+
+BUNDLED WITH
+   2.7.1
diff --git a/gemfiles/rails_7_2.gemfile b/gemfiles/rails_7_2.gemfile
new file mode 100644
index 0000000..386ea51
--- /dev/null
+++ b/gemfiles/rails_7_2.gemfile
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", group: :development
+gem "factory_bot"
+gem "puma"
+gem "rails", "~> 7.2"
+gem "rake", group: :development
+gem "rspec"
+gem "rubocop", group: :development
+gem "rubocop-factory_bot", group: :development
+gem "rubocop-performance", group: :development
+gem "rubocop-rails", group: :development
+gem "rubocop-rspec", group: :development
+gem "rubocop-rspec_rails", group: :development
+gem "sqlite3", "~> 2.1"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7_2.gemfile.lock b/gemfiles/rails_7_2.gemfile.lock
new file mode 100644
index 0000000..c298d3d
--- /dev/null
+++ b/gemfiles/rails_7_2.gemfile.lock
@@ -0,0 +1,293 @@
+PATH
+  remote: ..
+  specs:
+    simple_master (0.1.0)
+      activerecord (>= 7.0)
+      activesupport (>= 7.0)
+      request_store (>= 1.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+    actionmailer (7.2.3)
+      actionpack (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activesupport (= 7.2.3)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (7.2.3)
+      actionview (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      nokogiri (>= 1.8.5)
+      racc
+      rack (>= 2.2.4, < 3.3)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (7.2.3)
+      actionpack (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.2.3)
+      activesupport (= 7.2.3)
+      builder (~> 3.1)
+      cgi
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (7.2.3)
+      activesupport (= 7.2.3)
+      globalid (>= 0.3.6)
+    activemodel (7.2.3)
+      activesupport (= 7.2.3)
+    activerecord (7.2.3)
+      activemodel (= 7.2.3)
+      activesupport (= 7.2.3)
+      timeout (>= 0.4.0)
+    activestorage (7.2.3)
+      actionpack (= 7.2.3)
+      activejob (= 7.2.3)
+      activerecord (= 7.2.3)
+      activesupport (= 7.2.3)
+      marcel (~> 1.0)
+    activesupport (7.2.3)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.3)
+    base64 (0.3.0)
+    benchmark (0.5.0)
+    bigdecimal (4.0.1)
+    builder (3.3.0)
+    cgi (0.5.1)
+    concurrent-ruby (1.3.6)
+    connection_pool (3.0.2)
+    crass (1.0.6)
+    date (3.5.1)
+    diff-lcs (1.6.2)
+    drb (2.2.3)
+    erb (6.0.1)
+    erubi (1.13.1)
+    factory_bot (6.5.6)
+      activesupport (>= 6.1.0)
+    globalid (1.3.0)
+      activesupport (>= 6.1)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.18.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    loofah (2.25.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.9.0)
+      logger
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.1.0)
+    mini_mime (1.1.5)
+    minitest (6.0.0)
+      prism (~> 1.5)
+    net-imap (0.6.2)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.5)
+    nokogiri (1.18.10-arm64-darwin)
+      racc (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.10.0)
+      ast (~> 2.4.1)
+      racc
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
+    prism (1.7.0)
+    psych (5.3.1)
+      date
+      stringio
+    puma (7.1.0)
+      nio4r (~> 2.0)
+    racc (1.8.1)
+    rack (3.2.4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (7.2.3)
+      actioncable (= 7.2.3)
+      actionmailbox (= 7.2.3)
+      actionmailer (= 7.2.3)
+      actionpack (= 7.2.3)
+      actiontext (= 7.2.3)
+      actionview (= 7.2.3)
+      activejob (= 7.2.3)
+      activemodel (= 7.2.3)
+      activerecord (= 7.2.3)
+      activestorage (= 7.2.3)
+      activesupport (= 7.2.3)
+      bundler (>= 1.15.0)
+      railties (= 7.2.3)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (7.2.3)
+      actionpack (= 7.2.3)
+      activesupport (= 7.2.3)
+      cgi
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
+    rainbow (3.1.1)
+    rake (13.3.1)
+    rdoc (7.0.1)
+      erb
+      psych (>= 4.0.0)
+      tsort
+    regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
+    request_store (1.7.0)
+      rack (>= 1.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.6)
+    rubocop (1.82.1)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.48.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.48.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-factory_bot (2.28.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-performance (1.26.1)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
+    rubocop-rails (2.34.2)
+      activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
+      rack (>= 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.8.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.81)
+    rubocop-rspec_rails (2.32.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
+    ruby-progressbar (1.13.0)
+    securerandom (0.4.1)
+    sqlite3 (2.8.1-arm64-darwin)
+    stringio (3.2.0)
+    thor (1.4.0)
+    timeout (0.6.0)
+    tsort (0.2.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    useragent (0.16.11)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.4)
+
+PLATFORMS
+  arm64-darwin-24
+
+DEPENDENCIES
+  appraisal
+  factory_bot
+  puma
+  rails (~> 7.2)
+  rake
+  rspec
+  rubocop
+  rubocop-factory_bot
+  rubocop-performance
+  rubocop-rails
+  rubocop-rspec
+  rubocop-rspec_rails
+  simple_master!
+  sqlite3 (~> 2.1)
+
+BUNDLED WITH
+   2.7.1
diff --git a/gemfiles/rails_8_0.gemfile b/gemfiles/rails_8_0.gemfile
new file mode 100644
index 0000000..5b34199
--- /dev/null
+++ b/gemfiles/rails_8_0.gemfile
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", group: :development
+gem "factory_bot"
+gem "puma"
+gem "rails", "~> 8.0"
+gem "rake", group: :development
+gem "rspec"
+gem "rubocop", group: :development
+gem "rubocop-factory_bot", group: :development
+gem "rubocop-performance", group: :development
+gem "rubocop-rails", group: :development
+gem "rubocop-rspec", group: :development
+gem "rubocop-rspec_rails", group: :development
+gem "sqlite3", "~> 2.1"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_8_0.gemfile.lock b/gemfiles/rails_8_0.gemfile.lock
new file mode 100644
index 0000000..5a25c24
--- /dev/null
+++ b/gemfiles/rails_8_0.gemfile.lock
@@ -0,0 +1,292 @@
+PATH
+  remote: ..
+  specs:
+    simple_master (0.1.0)
+      activerecord (>= 7.0)
+      activesupport (>= 7.0)
+      request_store (>= 1.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    action_text-trix (2.1.15)
+      railties
+    actioncable (8.1.1)
+      actionpack (= 8.1.1)
+      activesupport (= 8.1.1)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (8.1.1)
+      actionpack (= 8.1.1)
+      activejob (= 8.1.1)
+      activerecord (= 8.1.1)
+      activestorage (= 8.1.1)
+      activesupport (= 8.1.1)
+      mail (>= 2.8.0)
+    actionmailer (8.1.1)
+      actionpack (= 8.1.1)
+      actionview (= 8.1.1)
+      activejob (= 8.1.1)
+      activesupport (= 8.1.1)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (8.1.1)
+      actionview (= 8.1.1)
+      activesupport (= 8.1.1)
+      nokogiri (>= 1.8.5)
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (8.1.1)
+      action_text-trix (~> 2.1.15)
+      actionpack (= 8.1.1)
+      activerecord (= 8.1.1)
+      activestorage (= 8.1.1)
+      activesupport (= 8.1.1)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (8.1.1)
+      activesupport (= 8.1.1)
+      builder (~> 3.1)
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (8.1.1)
+      activesupport (= 8.1.1)
+      globalid (>= 0.3.6)
+    activemodel (8.1.1)
+      activesupport (= 8.1.1)
+    activerecord (8.1.1)
+      activemodel (= 8.1.1)
+      activesupport (= 8.1.1)
+      timeout (>= 0.4.0)
+    activestorage (8.1.1)
+      actionpack (= 8.1.1)
+      activejob (= 8.1.1)
+      activerecord (= 8.1.1)
+      activesupport (= 8.1.1)
+      marcel (~> 1.0)
+    activesupport (8.1.1)
+      base64
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      json
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.3)
+    base64 (0.3.0)
+    bigdecimal (4.0.1)
+    builder (3.3.0)
+    concurrent-ruby (1.3.6)
+    connection_pool (3.0.2)
+    crass (1.0.6)
+    date (3.5.1)
+    diff-lcs (1.6.2)
+    drb (2.2.3)
+    erb (6.0.1)
+    erubi (1.13.1)
+    factory_bot (6.5.6)
+      activesupport (>= 6.1.0)
+    globalid (1.3.0)
+      activesupport (>= 6.1)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.18.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    loofah (2.25.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.9.0)
+      logger
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.1.0)
+    mini_mime (1.1.5)
+    minitest (6.0.0)
+      prism (~> 1.5)
+    net-imap (0.6.2)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.5)
+    nokogiri (1.18.10-arm64-darwin)
+      racc (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.10.0)
+      ast (~> 2.4.1)
+      racc
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
+    prism (1.7.0)
+    psych (5.3.1)
+      date
+      stringio
+    puma (7.1.0)
+      nio4r (~> 2.0)
+    racc (1.8.1)
+    rack (3.2.4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (8.1.1)
+      actioncable (= 8.1.1)
+      actionmailbox (= 8.1.1)
+      actionmailer (= 8.1.1)
+      actionpack (= 8.1.1)
+      actiontext (= 8.1.1)
+      actionview (= 8.1.1)
+      activejob (= 8.1.1)
+      activemodel (= 8.1.1)
+      activerecord (= 8.1.1)
+      activestorage (= 8.1.1)
+      activesupport (= 8.1.1)
+      bundler (>= 1.15.0)
+      railties (= 8.1.1)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (8.1.1)
+      actionpack (= 8.1.1)
+      activesupport (= 8.1.1)
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
+    rainbow (3.1.1)
+    rake (13.3.1)
+    rdoc (7.0.1)
+      erb
+      psych (>= 4.0.0)
+      tsort
+    regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
+    request_store (1.7.0)
+      rack (>= 1.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.6)
+    rubocop (1.82.1)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.48.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.48.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-factory_bot (2.28.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-performance (1.26.1)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
+    rubocop-rails (2.34.2)
+      activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
+      rack (>= 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.8.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.81)
+    rubocop-rspec_rails (2.32.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
+    ruby-progressbar (1.13.0)
+    securerandom (0.4.1)
+    sqlite3 (2.8.1-arm64-darwin)
+    stringio (3.2.0)
+    thor (1.4.0)
+    timeout (0.6.0)
+    tsort (0.2.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    uri (1.1.1)
+    useragent (0.16.11)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.4)
+
+PLATFORMS
+  arm64-darwin-24
+
+DEPENDENCIES
+  appraisal
+  factory_bot
+  puma
+  rails (~> 8.0)
+  rake
+  rspec
+  rubocop
+  rubocop-factory_bot
+  rubocop-performance
+  rubocop-rails
+  rubocop-rspec
+  rubocop-rspec_rails
+  simple_master!
+  sqlite3 (~> 2.1)
+
+BUNDLED WITH
+   2.7.1
diff --git a/gemfiles/rails_8_1.gemfile b/gemfiles/rails_8_1.gemfile
new file mode 100644
index 0000000..f857131
--- /dev/null
+++ b/gemfiles/rails_8_1.gemfile
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", group: :development
+gem "factory_bot"
+gem "puma"
+gem "rails", "~> 8.1"
+gem "rake", group: :development
+gem "rspec"
+gem "rubocop", group: :development
+gem "rubocop-factory_bot", group: :development
+gem "rubocop-performance", group: :development
+gem "rubocop-rails", group: :development
+gem "rubocop-rspec", group: :development
+gem "rubocop-rspec_rails", group: :development
+gem "sqlite3", "~> 2.1"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_8_1.gemfile.lock b/gemfiles/rails_8_1.gemfile.lock
new file mode 100644
index 0000000..0a08924
--- /dev/null
+++ b/gemfiles/rails_8_1.gemfile.lock
@@ -0,0 +1,292 @@
+PATH
+  remote: ..
+  specs:
+    simple_master (0.1.0)
+      activerecord (>= 7.0)
+      activesupport (>= 7.0)
+      request_store (>= 1.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    action_text-trix (2.1.15)
+      railties
+    actioncable (8.1.1)
+      actionpack (= 8.1.1)
+      activesupport (= 8.1.1)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (8.1.1)
+      actionpack (= 8.1.1)
+      activejob (= 8.1.1)
+      activerecord (= 8.1.1)
+      activestorage (= 8.1.1)
+      activesupport (= 8.1.1)
+      mail (>= 2.8.0)
+    actionmailer (8.1.1)
+      actionpack (= 8.1.1)
+      actionview (= 8.1.1)
+      activejob (= 8.1.1)
+      activesupport (= 8.1.1)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (8.1.1)
+      actionview (= 8.1.1)
+      activesupport (= 8.1.1)
+      nokogiri (>= 1.8.5)
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (8.1.1)
+      action_text-trix (~> 2.1.15)
+      actionpack (= 8.1.1)
+      activerecord (= 8.1.1)
+      activestorage (= 8.1.1)
+      activesupport (= 8.1.1)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (8.1.1)
+      activesupport (= 8.1.1)
+      builder (~> 3.1)
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (8.1.1)
+      activesupport (= 8.1.1)
+      globalid (>= 0.3.6)
+    activemodel (8.1.1)
+      activesupport (= 8.1.1)
+    activerecord (8.1.1)
+      activemodel (= 8.1.1)
+      activesupport (= 8.1.1)
+      timeout (>= 0.4.0)
+    activestorage (8.1.1)
+      actionpack (= 8.1.1)
+      activejob (= 8.1.1)
+      activerecord (= 8.1.1)
+      activesupport (= 8.1.1)
+      marcel (~> 1.0)
+    activesupport (8.1.1)
+      base64
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      json
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    ast (2.4.3)
+    base64 (0.3.0)
+    bigdecimal (4.0.1)
+    builder (3.3.0)
+    concurrent-ruby (1.3.6)
+    connection_pool (3.0.2)
+    crass (1.0.6)
+    date (3.5.1)
+    diff-lcs (1.6.2)
+    drb (2.2.3)
+    erb (6.0.1)
+    erubi (1.13.1)
+    factory_bot (6.5.6)
+      activesupport (>= 6.1.0)
+    globalid (1.3.0)
+      activesupport (>= 6.1)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.18.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    loofah (2.25.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.9.0)
+      logger
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.1.0)
+    mini_mime (1.1.5)
+    minitest (6.0.0)
+      prism (~> 1.5)
+    net-imap (0.6.2)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.5)
+    nokogiri (1.18.10-arm64-darwin)
+      racc (~> 1.4)
+    parallel (1.27.0)
+    parser (3.3.10.0)
+      ast (~> 2.4.1)
+      racc
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
+    prism (1.7.0)
+    psych (5.3.1)
+      date
+      stringio
+    puma (7.1.0)
+      nio4r (~> 2.0)
+    racc (1.8.1)
+    rack (3.2.4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (8.1.1)
+      actioncable (= 8.1.1)
+      actionmailbox (= 8.1.1)
+      actionmailer (= 8.1.1)
+      actionpack (= 8.1.1)
+      actiontext (= 8.1.1)
+      actionview (= 8.1.1)
+      activejob (= 8.1.1)
+      activemodel (= 8.1.1)
+      activerecord (= 8.1.1)
+      activestorage (= 8.1.1)
+      activesupport (= 8.1.1)
+      bundler (>= 1.15.0)
+      railties (= 8.1.1)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (8.1.1)
+      actionpack (= 8.1.1)
+      activesupport (= 8.1.1)
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
+    rainbow (3.1.1)
+    rake (13.3.1)
+    rdoc (7.0.1)
+      erb
+      psych (>= 4.0.0)
+      tsort
+    regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
+    request_store (1.7.0)
+      rack (>= 1.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.6)
+    rubocop (1.82.1)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.48.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.48.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-factory_bot (2.28.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-performance (1.26.1)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
+    rubocop-rails (2.34.2)
+      activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
+      rack (>= 1.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.8.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.81)
+    rubocop-rspec_rails (2.32.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
+    ruby-progressbar (1.13.0)
+    securerandom (0.4.1)
+    sqlite3 (2.8.1-arm64-darwin)
+    stringio (3.2.0)
+    thor (1.4.0)
+    timeout (0.6.0)
+    tsort (0.2.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    uri (1.1.1)
+    useragent (0.16.11)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.4)
+
+PLATFORMS
+  arm64-darwin-24
+
+DEPENDENCIES
+  appraisal
+  factory_bot
+  puma
+  rails (~> 8.1)
+  rake
+  rspec
+  rubocop
+  rubocop-factory_bot
+  rubocop-performance
+  rubocop-rails
+  rubocop-rspec
+  rubocop-rspec_rails
+  simple_master!
+  sqlite3 (~> 2.1)
+
+BUNDLED WITH
+   2.7.1
diff --git a/lib/simple_master.rb b/lib/simple_master.rb
index 2be9d98..156c2b1 100644
--- a/lib/simple_master.rb
+++ b/lib/simple_master.rb
@@ -2,6 +2,7 @@
 
 require "active_support/dependencies"
 require "active_record"
+require "request_store"
 require "logger"
 require "simple_master/version"
 
diff --git a/simple_master.gemspec b/simple_master.gemspec
index a425d14..1a9bdfa 100644
--- a/simple_master.gemspec
+++ b/simple_master.gemspec
@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description   = "SimpleMaster loads master tables into memory, builds associations, and offers a small DSL for master data models."
   spec.homepage      = "https://github.com/aktsk/simple_master"
   spec.license       = "MIT"
-  spec.required_ruby_version = ">= 3.1"
+  spec.required_ruby_version = ">= 3.2"
 
   spec.files = Dir.chdir(__dir__) {
     Dir["lib/**/*"]
diff --git a/spec/simple_master/active_record/extension_spec.rb b/spec/simple_master/active_record/extension_spec.rb
new file mode 100644
index 0000000..f7453c2
--- /dev/null
+++ b/spec/simple_master/active_record/extension_spec.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe SimpleMaster::ActiveRecord::Extension do
+  before do
+    reset_active_record_tables
+  end
+
+  it "connects ActiveRecord to master" do
+    player = Player.create!(name: "Hero", lv: 2)
+    level = Level.find_by(:lv, 2)
+
+    expect(player.level).to eq(level)
+  end
+
+  it "resolves polymorphic belongs_to for master records" do
+    player = Player.create!(name: "Hero", lv: 1)
+    player_item1 = PlayerItem.create!(player: player, item_type: "Weapon", item_id: 1)
+
+    expect(player_item1.item).to be_a(Weapon)
+    expect(player_item1.item.name).to eq("Bronze Pistol")
+
+    player_item2 = PlayerItem.create!(player: player, item: Weapon.find(1))
+
+    expect(player_item2.item_id).to eq(1)
+    expect(player_item2.item_type).to eq("Gun")
+  end
+
+  it "aggregates items through player_items" do
+    player = Player.create!(name: "Hero", lv: 1)
+    PlayerItem.create!(player: player, item_type: "Weapon", item_id: 1, quantity: 1)
+    PlayerItem.create!(player: player, item_type: "Armor", item_id: 2, quantity: 1)
+    PlayerItem.create!(player: player, item_type: "Potion", item_id: 3, quantity: 1)
+
+    expect(player.items.map(&:class)).to contain_exactly(Gun, Armor, Potion)
+    expect(player.items.map { |item| item.class.base_class }).to contain_exactly(Weapon, Armor, Potion)
+    expect(player.items.map(&:name)).to contain_exactly("Bronze Pistol", "Chain Mail", "Elixir")
+  end
+end
diff --git a/spec/simple_master/loader/marshal_loader_spec.rb b/spec/simple_master/loader/marshal_loader_spec.rb
new file mode 100644
index 0000000..206df7a
--- /dev/null
+++ b/spec/simple_master/loader/marshal_loader_spec.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+require "tmpdir"
+
+RSpec.describe SimpleMaster::Loader::MarshalLoader do
+  it "loads marshaled records for all tables" do
+    Dir.mktmpdir do |dir|
+      # dump current dataset to marshal files
+      $current_dataset.tables.each do |klass, table|
+        path = File.join(dir, "#{klass.table_name}.marshal")
+        File.binwrite(path, Marshal.dump(table.all))
+      end
+
+      loader = described_class.new(path: dir)
+      dataset = SimpleMaster::Storage::Dataset.new(loader: loader)
+      dataset.load
+
+      SimpleMaster.use_dataset(dataset) do
+        expect(Weapon.find(1).name).to eq("Bronze Pistol")
+        expect(Level.find(2).lv).to eq(2)
+        expect(Enemy.find(2).name).to eq("Ogre Chief")
+      end
+    end
+  end
+end
diff --git a/spec/simple_master/loader/query_loader_spec.rb b/spec/simple_master/loader/query_loader_spec.rb
new file mode 100644
index 0000000..5650b92
--- /dev/null
+++ b/spec/simple_master/loader/query_loader_spec.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe SimpleMaster::Loader::QueryLoader do
+  it "loads records from database tables" do
+    connection = ActiveRecord::Base.connection
+
+    %w(weapons armors potions levels enemies rewards).each do |table|
+      connection.execute("DELETE FROM #{table}")
+    end
+
+    info_json = connection.quote('{"slots":1,"origin":"db"}')
+    metadata_json = connection.quote('{"source":"query","tags":["loader"]}')
+
+    connection.execute <<~SQL
+      INSERT INTO weapons (id, type, name, attack, info, metadata, rarity, flags)
+      VALUES (1, 'Gun', 'Query Pistol', 12.5, #{info_json}, #{metadata_json}, 1, 5)
+    SQL
+
+    connection.execute <<~SQL
+      INSERT INTO enemies (id, name, is_boss, start_at, end_at, attack, defence, hp)
+      VALUES (1, 'DB Ogre', 1, '2024-05-01 10:00:00', '2024-05-01 18:00:00', 14.0, 8.0, 45.0)
+    SQL
+
+    dataset = SimpleMaster::Storage::Dataset.new(loader: described_class.new)
+    dataset.load
+
+    SimpleMaster.use_dataset(dataset) do
+      weapon = Weapon.find(1)
+
+      expect(weapon).to be_a(Gun)
+      expect(weapon.name).to eq("Query Pistol")
+      expect(weapon.attack).to eq(12.5)
+      expect(weapon.rarity).to eq(:rare)
+      expect(weapon.flags).to eq([:tradeable, :limited])
+      expect(weapon.info).to(satisfy { |value|
+        [{ slots: 1, origin: "db" }, { "slots" => 1, "origin" => "db" }].include?(value)
+      })
+      expect(weapon.metadata).to eq({ "source" => "query", "tags" => ["loader"] })
+
+      enemy = Enemy.find(1)
+      expect(enemy.is_boss).to be(true)
+      expect(enemy.start_at).to eq(Time.utc(2024, 5, 1, 10, 0, 0))
+      expect(enemy.end_at).to eq(Time.utc(2024, 5, 1, 18, 0, 0))
+    end
+  end
+end
diff --git a/spec/simple_master/master/associations_spec.rb b/spec/simple_master/master/associations_spec.rb
new file mode 100644
index 0000000..506093e
--- /dev/null
+++ b/spec/simple_master/master/associations_spec.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe "associations" do
+  before { reset_active_record_tables }
+
+  describe "belongs_to (master)" do
+    it "works correctly" do
+      reward = Reward.find(1)
+
+      expect(reward.enemy).to eq(Enemy.find(1))
+    end
+  end
+
+  describe "belongs_to (polymorphic master)" do
+    it "works correctly" do
+      reward = Reward.find(3)
+
+      expect(reward.reward).to eq(Potion.find(2))
+    end
+  end
+
+  describe "has_many (master)" do
+    it "works correctly" do
+      enemy = Enemy.find(1)
+
+      expect(enemy.rewards.map(&:id)).to eq([1, 2])
+    end
+  end
+
+  describe "has_many (ActiveRecord)" do
+    it "works correctly" do
+      player = Player.create!(name: "Hero", lv: 2)
+      level = Level.find_by(:lv, 2)
+
+      expect(level.players).to contain_exactly(player)
+    end
+  end
+end
diff --git a/spec/simple_master/master/cache_spec.rb b/spec/simple_master/master/cache_spec.rb
new file mode 100644
index 0000000..001a3e5
--- /dev/null
+++ b/spec/simple_master/master/cache_spec.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe "cache" do
+  describe "cache_class_method" do
+    subject(:cached_result) { Weapon.receivable_sources }
+
+    let!(:result) { Weapon.receivable_sources }
+    let(:enemies) { Enemy.id_hash }
+
+    it "collects receivable sources per item" do
+      expect(cached_result).to match({
+                                       1 => contain_exactly(enemies[1]),
+                                       2 => contain_exactly(enemies[4]),
+                                       3 => contain_exactly(enemies[2], enemies[9], enemies[10]),
+                                     })
+      expect(cached_result.object_id).to be(result.object_id)
+    end
+
+    it "keeps STI sub-table caches separate" do
+      expect(Blade.receivable_sources.keys).to contain_exactly(2)
+      expect(Gun.receivable_sources.keys).to contain_exactly(1, 3)
+    end
+  end
+
+  describe "cache_method" do
+    subject(:cached_result) { weapon.receivable_sources }
+
+    let(:weapon) { Weapon.find(1) }
+    let!(:result) { weapon.receivable_sources }
+
+    it "collects receivable sources per item" do
+      expect(cached_result.map(&:id)).to contain_exactly(1)
+      expect(cached_result.object_id).to be(result.object_id)
+    end
+  end
+end
diff --git a/spec/simple_master/master/columns_spec.rb b/spec/simple_master/master/columns_spec.rb
new file mode 100644
index 0000000..17b1bfe
--- /dev/null
+++ b/spec/simple_master/master/columns_spec.rb
@@ -0,0 +1,172 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe "columns" do
+  before { reset_active_record_tables }
+
+  describe "IntegerColumn" do
+    it "casts correctly" do
+      level = Level.new
+
+      level.lv = "3"
+      expect(level.lv).to eq(3)
+      expect(level.lv_value_for_sql).to eq(3)
+
+      level.lv = "  "
+      expect(level.lv).to be_nil
+      expect(level.lv_value_for_sql).to eq("NULL")
+
+      level.lv = 4
+      expect(level.lv).to eq(4)
+      expect(level.lv_value_for_sql).to eq(4)
+    end
+  end
+
+  describe "FloatColumn" do
+    it "casts correctly" do
+      weapon = Weapon.new
+
+      weapon.attack = "12.5"
+      expect(weapon.attack).to eq(12.5)
+      expect(weapon.attack_value_for_sql).to eq(12.5)
+
+      weapon.attack = 7
+      expect(weapon.attack).to eq(7.0)
+      expect(weapon.attack_value_for_sql).to eq(7.0)
+
+      weapon.attack = " "
+      expect(weapon.attack).to be_nil
+      expect(weapon.attack_value_for_sql).to eq("NULL")
+    end
+  end
+
+  describe "BooleanColumn" do
+    it "casts correctly" do
+      enemy = Enemy.new
+
+      enemy.is_boss = "true"
+      expect(enemy.is_boss).to be(true)
+      expect(enemy.is_boss?).to be(true)
+      expect(enemy.is_boss_value_for_sql).to eq(1)
+
+      enemy.is_boss = "0"
+      expect(enemy.is_boss).to be(false)
+      expect(enemy.is_boss?).to be(false)
+      expect(enemy.is_boss_value_for_sql).to eq(0)
+
+      enemy.is_boss = nil
+      expect(enemy.is_boss).to be_nil
+      expect(enemy.is_boss?).to be(false)
+      expect(enemy.is_boss_value_for_sql).to eq("NULL")
+    end
+  end
+
+  describe "TimeColumn" do
+    it "casts correctly" do
+      enemy = Enemy.new
+
+      enemy.start_at = "2024-05-01T10:00:00Z"
+      expect(enemy.start_at).to eq(Time.utc(2024, 5, 1, 10, 0, 0))
+      expect(enemy.start_at_value_for_sql).to eq("'2024-05-01 10:00:00'")
+
+      time_value = Time.utc(2024, 5, 2, 12, 30, 15)
+      enemy.end_at = time_value
+      expect(enemy.end_at).to eq(time_value)
+
+      enemy.start_at = nil
+      expect(enemy.start_at_value_for_sql).to eq("NULL")
+    end
+  end
+
+  describe "JsonColumn" do
+    it "(with symbolize_names: true) casts correctly" do
+      weapon = Weapon.new
+
+      weapon.info = { slots: 2, origin: "ruins" }
+      expect(weapon.info).to eq({ slots: 2, origin: "ruins" })
+      expect(weapon.info_value_for_sql).to eq("'{\"slots\":2,\"origin\":\"ruins\"}'")
+
+      weapon.info = "{\"slots\":1,\"origin\":\"forge\"}"
+      expect(weapon.info).to eq({ slots: 1, origin: "forge" })
+      expect(weapon.info_value_for_sql).to eq("'{\"slots\":1,\"origin\":\"forge\"}'")
+
+      weapon.info = "null"
+      expect(weapon.info).to be_nil
+      expect(weapon.info_value_for_sql).to eq("NULL")
+    end
+
+    it "(with symbolize_names: false) casts correctly" do
+      weapon = Weapon.new
+
+      weapon.metadata = "{\"source\":\"archive\",\"tags\":[\"starter\"]}"
+      expect(weapon.metadata).to eq({ "source" => "archive", "tags" => ["starter"] })
+      expect(weapon.metadata_value_for_sql).to eq("'{\"source\":\"archive\",\"tags\":[\"starter\"]}'")
+
+      weapon.metadata = { "source" => "manual", "tags" => ["custom"] }
+      expect(weapon.metadata).to eq({ "source" => "manual", "tags" => ["custom"] })
+      expect(weapon.metadata_value_for_sql).to eq("'{\"source\":\"manual\",\"tags\":[\"custom\"]}'")
+
+      weapon.metadata = "null"
+      expect(weapon.metadata).to be_nil
+      expect(weapon.metadata_value_for_sql).to eq("NULL")
+    end
+  end
+
+  describe "EnumColumn" do
+    it "casts correctly" do
+      weapon = Weapon.new
+
+      weapon.rarity = "1"
+      expect(weapon.rarity).to eq(:rare)
+      expect(weapon.rarity_value_for_sql).to eq(1)
+
+      weapon.rarity = 2
+      expect(weapon.rarity).to eq(:epic)
+      expect(weapon.rarity_value_for_sql).to eq(2)
+
+      weapon.rarity = nil
+      expect(weapon.rarity_value_for_sql).to eq("NULL")
+    end
+  end
+
+  describe "BitmaskColumn" do
+    it "casts correctly" do
+      weapon = Weapon.new
+
+      weapon.flags = [:tradeable, :limited]
+      expect(weapon.flags).to eq([:tradeable, :limited])
+      expect(weapon.flags_value_for_sql).to eq(5)
+
+      weapon.flags = :soulbound
+      expect(weapon.flags).to eq([:soulbound])
+
+      weapon.flags = nil
+      expect(weapon.flags_value_for_sql).to eq("NULL")
+    end
+  end
+
+  describe "PolymorphicTypeColumn" do
+    it "casts correctly" do
+      reward = Reward.new
+
+      reward.reward_type = :Potion
+      expect(reward.reward_type).to eq("Potion")
+      expect(reward.reward_type_class).to eq(Potion)
+      expect(reward.reward_type_value_for_sql).to eq("'Potion'")
+
+      reward = Reward.find(3)
+      expect(reward.reward_type_class).to eq(Potion)
+      expect(reward.reward).to eq(Potion.find(2))
+    end
+  end
+
+  describe "StiTypeColumn" do
+    it "casts correctly" do
+      weapon = Gun.new
+
+      expect(weapon.type).to eq("Gun")
+      expect(weapon.type_value_for_sql).to eq("'Gun'")
+    end
+  end
+end
diff --git a/spec/simple_master/master/filterable_spec.rb b/spec/simple_master/master/filterable_spec.rb
new file mode 100644
index 0000000..c4e7eb0
--- /dev/null
+++ b/spec/simple_master/master/filterable_spec.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe SimpleMaster::Master::Filterable do
+  it "supports id-based find helpers" do
+    expect(Weapon.find(1).name).to eq("Bronze Pistol")
+    expect(Weapon.find_by_id(99)).to be_nil
+    expect(Weapon.find_by_ids([1, 3]).map(&:id)).to eq([1, 3])
+    expect { Weapon.find_by_ids!([1, 99]) }.to raise_error(KeyError)
+  end
+
+  it "supports grouped lookups" do
+    expect(Reward.find_by(:enemy_id, 1).id).to eq(1)
+    expect(Reward.all_by(:enemy_id, 1).map(&:id)).to eq([1, 2])
+    expect { Reward.all_by!(:enemy_id, 99) }.to raise_error(KeyError)
+    expect(Reward.all_in(:enemy_id, [1, 2]).map(&:id)).to eq([1, 2, 3, 4])
+    expect(Reward.all_in(:enemy_id, [1, 2])).to be_frozen
+  end
+
+  it "delegates collection helpers to all" do
+    expect(Weapon.pluck(:name)).to include("Bronze Pistol", "Silver Saber", "Crimson Rifle")
+    expect(Weapon.first).to be_a(Weapon)
+  end
+
+  it "checks id existence" do
+    expect(Weapon.exists?(1)).to be(true)
+    expect(Weapon.exists?(99)).to be(false)
+  end
+
+  it "raises on missing group key and handles empty all_in" do
+    expect { Reward.all_by(:unknown_key, 1) }.to raise_error(KeyError)
+    expect(Reward.all_in(:enemy_id, [])).to eq([])
+    expect(Reward.all_in(:enemy_id, [])).to be_frozen
+  end
+end
diff --git a/spec/simple_master/master/model_spec.rb b/spec/simple_master/master/model_spec.rb
new file mode 100644
index 0000000..5a2bf7c
--- /dev/null
+++ b/spec/simple_master/master/model_spec.rb
@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe "model" do
+  describe "sti_class?" do
+    it "returns true for STI base classes and subclasses" do
+      expect(Weapon.sti_class?).to be(true)
+      expect(Gun.sti_class?).to be(true)
+      expect(Armor.sti_class?).to be(false)
+    end
+  end
+
+  describe "sti_base_class?" do
+    it "returns true only for STI base classes" do
+      expect(Weapon.sti_base_class?).to be(true)
+      expect(Gun.sti_base_class?).to be(false)
+      expect(Armor.sti_base_class?).to be(false)
+    end
+  end
+
+  describe "sti_sub_class?" do
+    it "returns true only for STI subclasses" do
+      expect(Gun.sti_sub_class?).to be(true)
+      expect(Blade.sti_sub_class?).to be(true)
+      expect(Weapon.sti_sub_class?).to be(false)
+      expect(Armor.sti_sub_class?).to be(false)
+    end
+  end
+
+  describe "base_class" do
+    it "returns the STI base class when present" do
+      expect(Weapon.base_class).to eq(Weapon)
+      expect(Gun.base_class).to eq(Weapon)
+      expect(Blade.base_class).to eq(Weapon)
+      expect(Armor.base_class).to eq(Armor)
+    end
+  end
+
+  describe "base_class?" do
+    it "returns true for STI base classes and non-STI classes" do
+      expect(Weapon.base_class?).to be(true)
+      expect(Gun.base_class?).to be(false)
+      expect(Armor.base_class?).to be(true)
+    end
+  end
+
+  describe "globalized?" do
+    it "returns true when any column is globalized" do
+      expect(Weapon.globalized?).to be(true)
+    end
+
+    it "returns false when no globalized columns exist" do
+      expect(Armor.globalized?).to be(false)
+    end
+  end
+end
diff --git a/spec/simple_master/master/queryable_spec.rb b/spec/simple_master/master/queryable_spec.rb
new file mode 100644
index 0000000..37bfaec
--- /dev/null
+++ b/spec/simple_master/master/queryable_spec.rb
@@ -0,0 +1,76 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe SimpleMaster::Master::Queryable do
+  let(:connection) { ActiveRecord::Base.connection }
+
+  before do
+    %w(weapons levels).each do |table|
+      connection.execute("DELETE FROM #{table}")
+    end
+  end
+
+  describe ".table_available?" do
+    it "returns true for existing tables" do
+      expect(Weapon.table_available?).to be(true)
+    end
+
+    it "returns false for missing tables" do
+      allow(Weapon).to receive(:table_name).and_return("missing_table")
+
+      expect(Weapon.table_available?).to be(false)
+    end
+  end
+
+  describe ".query_select_all" do
+    it "returns rows from the backing table" do
+      connection.execute <<~SQL
+        INSERT INTO weapons (id, type, name, attack, rarity, flags)
+        VALUES (1, 'Gun', 'Queryable Sword', 9.5, 2, 1)
+      SQL
+
+      result = Weapon.query_select_all
+      row = result.to_a.find { |record| record["id"] == 1 }
+
+      expect(result.columns).to include("name", "attack")
+      expect(row["name"]).to eq("Queryable Sword")
+      expect(row["attack"]).to eq(9.5)
+    end
+  end
+
+  describe ".sqlite_insert_query" do
+    it "builds SQL that can be executed" do
+      weapon = Weapon.new(
+        id: 1,
+        type: "Gun",
+        name: "SQL Pistol",
+        attack: 11.0,
+        info: { slots: 1 },
+        metadata: { "source" => "sql" },
+        rarity: :rare,
+        flags: [:tradeable],
+      )
+
+      sql = Weapon.sqlite_insert_query([weapon])
+      connection.execute(sql)
+
+      row = connection.select_all("SELECT name, rarity, flags FROM weapons WHERE id = 1").to_a.first
+      expect(row["name"]).to eq("SQL Pistol")
+      expect(row["rarity"].to_i).to eq(1)
+      expect(row["flags"].to_i).to eq(1)
+    end
+  end
+
+  describe ".query_delete_all" do
+    it "removes all rows from the table" do
+      connection.execute("INSERT INTO levels (id, lv, attack) VALUES (1, 3, 2.5)")
+
+      expect(connection.select_all("SELECT * FROM levels").to_a.size).to eq(1)
+
+      Level.query_delete_all
+
+      expect(connection.select_all("SELECT * FROM levels").to_a).to be_empty
+    end
+  end
+end
diff --git a/spec/simple_master/master/validatable_spec.rb b/spec/simple_master/master/validatable_spec.rb
new file mode 100644
index 0000000..aebb779
--- /dev/null
+++ b/spec/simple_master/master/validatable_spec.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe SimpleMaster::Master::Validatable do
+  it "validates all master records" do
+    errors = ApplicationMaster.validate_all_records
+    expect(errors).to be_empty
+  end
+end
diff --git a/spec/simple_master/storage/dataset_spec.rb b/spec/simple_master/storage/dataset_spec.rb
new file mode 100644
index 0000000..e69602d
--- /dev/null
+++ b/spec/simple_master/storage/dataset_spec.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe SimpleMaster::Storage::Dataset do
+  it "keeps loaded records when digest is unchanged" do
+    weapon = Weapon.first
+    $current_dataset.load
+
+    expect(Weapon.first.object_id).to equal(weapon.object_id)
+  end
+
+  it "duplicates dataset without reloading tables" do
+    dup_dataset = $current_dataset.duplicate
+    dup_dataset.load
+
+    expect(SimpleMaster.use_dataset(dup_dataset) { Weapon.first.object_id }).to equal(Weapon.first.object_id)
+  end
+
+  it "memoizes dataset cache_fetch" do
+    dataset = described_class.new(loader: JsonLoader.new)
+
+    first_time = dataset.cache_fetch(:foo) { Object.new }
+    second_time = dataset.cache_fetch(:foo) { Object.new }
+
+    expect(first_time.object_id).to eq(second_time.object_id)
+  end
+end
diff --git a/spec/simple_master/storage/loader_spec.rb b/spec/simple_master/storage/loader_spec.rb
new file mode 100644
index 0000000..9fab7c8
--- /dev/null
+++ b/spec/simple_master/storage/loader_spec.rb
@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe "Loader" do
+  describe "loading" do
+    it "instantiates STI records as subclasses" do
+      pistol = Weapon.find(1)
+
+      expect(pistol).to be_a(Gun)
+      expect(pistol.attack).to eq(12.5)
+
+      expect(Gun.all).to include(pistol)
+      expect(Weapon.all).to include(pistol)
+
+      expect(Blade.find_by_id(1)).to be_nil
+      expect(Gun.find(1)).to eq(pistol)
+
+      expect(Weapon.all.map(&:id)).to contain_exactly(1, 2, 3, 4)
+      expect(Gun.all.map(&:id)).to contain_exactly(1, 3)
+      expect(Blade.all.map(&:id)).to contain_exactly(2, 4)
+    end
+  end
+
+  describe "Globalization" do
+    let(:potion) { Potion.find(1) }
+    let(:weapon) { Weapon.find(1) }
+
+    it "can be loaded by loader" do
+      I18n.with_locale(:ja) do
+        expect(potion.name).to eq("マイナーヒール")
+      end
+    end
+
+    it "applies globalize_proc when provided" do
+      I18n.with_locale(:ja) do
+        expect(weapon.name).to eq("ブロンズピストル")
+      end
+    end
+  end
+
+  it "applies diff json to dataset" do
+    diff = {
+      "weapons" => {
+        "2" => { "attack" => 42.0, "_globalized_name" => { en: "Gold Saber", ja: "ゴールドセイバー" } },
+        "3" => nil,
+      },
+    }
+
+    dataset = $current_dataset.duplicate(diff: diff)
+    dataset.load
+
+    SimpleMaster.use_dataset(dataset) do
+      weapon = Weapon.find(2)
+
+      expect(weapon.attack).to eq(42.0)
+      expect(weapon.name).to eq("Gold Saber")
+      I18n.with_locale(:ja) do
+        expect(weapon.name).to eq("ゴールドセイバー")
+      end
+      expect(Weapon.id_hash).not_to have_key(3)
+    end
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..5b8b7da
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+ENV["DATABASE_URL"] ||= "sqlite3::memory:"
+
+require "bundler/setup"
+require "rspec"
+require "rails"
+require "active_record/railtie"
+require "active_support/time"
+require "factory_bot"
+require "logger"
+require "simple_master"
+
+# Boot sample Rails app
+require_relative "../examples/rails_sample/lib/json_loader"
+require_relative "../examples/rails_sample/config/environment"
+
+ActiveRecord::Base.establish_connection(:test)
+ActiveRecord::Base.logger = Rails.logger
+ActiveRecord::Base.logger.level = Logger::WARN
+ActiveRecord::Migration.verbose = false
+
+# Load schema and models
+load File.expand_path("../examples/rails_sample/db/schema.rb", __dir__)
+%w(
+  application_record
+  player
+  player_item
+  weapon
+  armor
+  potion
+  level
+  enemy
+  reward
+).each do |model|
+  require File.expand_path("../examples/rails_sample/app/models/#{model}", __dir__)
+end
+
+# Test support helpers
+require_relative "support/dataset_helper" if File.exist?(File.expand_path("support/dataset_helper.rb", __dir__))
+FactoryBot.find_definitions
+
+I18n.available_locales = [:en, :ja]
+
+RSpec.configure do |config|
+  config.order = :random
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+  config.include DatasetHelper
+  config.include FactoryBot::Syntax::Methods
+  config.after { RequestStore.clear! }
+end
diff --git a/spec/support/dataset_helper.rb b/spec/support/dataset_helper.rb
new file mode 100644
index 0000000..267bbe6
--- /dev/null
+++ b/spec/support/dataset_helper.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+module DatasetHelper
+  def build_dataset(loader: JsonLoader.new, diff: nil)
+    dataset = SimpleMaster::Storage::Dataset.new(loader: loader)
+    dataset.diff = diff if diff
+    # dataset.load
+    dataset
+  end
+
+  def with_dataset(loader: JsonLoader.new, diff: nil)
+    dataset = build_dataset(loader: loader, diff: diff)
+    SimpleMaster.use_dataset(dataset) do
+      yield dataset
+    end
+  end
+
+  def reset_active_record_tables
+    PlayerItem.delete_all
+    Player.delete_all
+  end
+end
+
+RSpec.configure do |config|
+  config.include DatasetHelper
+end

From f1c08f880e5b9b0670f1693fb8282b7bdba45d47 Mon Sep 17 00:00:00 2001
From: "jingyuan.zhao" <jingyuan.zhao@aktsk.jp>
Date: Wed, 24 Dec 2025 11:42:24 +0900
Subject: [PATCH 2/3] Make empty options editable after def_column

---
 lib/simple_master/master/dsl.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/simple_master/master/dsl.rb b/lib/simple_master/master/dsl.rb
index 4040b31..fcaa38b 100644
--- a/lib/simple_master/master/dsl.rb
+++ b/lib/simple_master/master/dsl.rb
@@ -11,7 +11,7 @@ module Dsl
         bitmask: Column::BitmaskColumn,
       }.freeze
 
-      def def_column(column_name, options = EMPTY_HASH)
+      def def_column(column_name, options = {})
         column = column_type(column_name, options).new(column_name, options)
         columns << column
 

From 485f85d5b57ab1022ef7262b4538e64f5fefedca Mon Sep 17 00:00:00 2001
From: Go Murakami <go.murakami@aktsk.jp>
Date: Thu, 25 Dec 2025 23:54:45 +0900
Subject: [PATCH 3/3] Ignore Gemfile.lock and tweak CI

---
 .github/workflows/ci.yml              |   2 +-
 .gitignore                            |   6 +
 Gemfile                               |   4 +-
 Gemfile.lock                          | 297 --------------------------
 gemfiles/rails_7_0.gemfile.lock       | 293 -------------------------
 gemfiles/rails_7_1.gemfile.lock       | 293 -------------------------
 gemfiles/rails_7_2.gemfile.lock       | 293 -------------------------
 gemfiles/rails_8_0.gemfile.lock       | 292 -------------------------
 gemfiles/rails_8_1.gemfile.lock       | 292 -------------------------
 lib/simple_master/master/queryable.rb |  10 +-
 10 files changed, 14 insertions(+), 1768 deletions(-)
 delete mode 100644 Gemfile.lock
 delete mode 100644 gemfiles/rails_7_0.gemfile.lock
 delete mode 100644 gemfiles/rails_7_1.gemfile.lock
 delete mode 100644 gemfiles/rails_7_2.gemfile.lock
 delete mode 100644 gemfiles/rails_8_0.gemfile.lock
 delete mode 100644 gemfiles/rails_8_1.gemfile.lock

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a5569ff..0a513de 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,7 +34,7 @@ jobs:
           - rails-8_0
           - rails-8_1
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
diff --git a/.gitignore b/.gitignore
index 4f02cc6..b350041 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,9 @@
 /tmp/
 /.bundle/
 /vendor/bundle/
+/Gemfile.lock
+/gemfiles/*.gemfile.lock
+/.idea/
+/pkg
+*.lock
+*.gem
diff --git a/Gemfile b/Gemfile
index e895375..2bd9e07 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gemspec
 
 gem "factory_bot", group: :test
 gem "puma", group: :development
-gem "rails", ENV.fetch("RAILS_VERSION", "~> 7.2")
+gem "rails", ENV.fetch("RAILS_VERSION", "~> 7.2"), group: :development
 
 gem "rspec", group: :test
 gem "rubocop", group: :development
@@ -15,7 +15,7 @@ gem 'rubocop-performance', group: :development
 gem 'rubocop-rails', group: :development
 gem 'rubocop-rspec', group: :development
 gem 'rubocop-rspec_rails', group: :development
-gem "sqlite3", "~> 2.1"
+gem "sqlite3", "~> 2.1", group: :development
 
 gem "appraisal", group: :development
 gem "rake", group: :development
diff --git a/Gemfile.lock b/Gemfile.lock
deleted file mode 100644
index 5cdfdfb..0000000
--- a/Gemfile.lock
+++ /dev/null
@@ -1,297 +0,0 @@
-PATH
-  remote: .
-  specs:
-    simple_master (0.1.0)
-      activerecord (>= 7.0)
-      activesupport (>= 7.0)
-      request_store (>= 1.0)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actioncable (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
-      zeitwerk (~> 2.6)
-    actionmailbox (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-    actionmailer (7.2.3)
-      actionpack (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-      rails-dom-testing (~> 2.2)
-    actionpack (7.2.3)
-      actionview (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      nokogiri (>= 1.8.5)
-      racc
-      rack (>= 2.2.4, < 3.3)
-      rack-session (>= 1.0.1)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-      useragent (~> 0.16)
-    actiontext (7.2.3)
-      actionpack (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.6.0)
-      nokogiri (>= 1.8.5)
-    actionview (7.2.3)
-      activesupport (= 7.2.3)
-      builder (~> 3.1)
-      cgi
-      erubi (~> 1.11)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-    activejob (7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.3.6)
-    activemodel (7.2.3)
-      activesupport (= 7.2.3)
-    activerecord (7.2.3)
-      activemodel (= 7.2.3)
-      activesupport (= 7.2.3)
-      timeout (>= 0.4.0)
-    activestorage (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activesupport (= 7.2.3)
-      marcel (~> 1.0)
-    activesupport (7.2.3)
-      base64
-      benchmark (>= 0.3)
-      bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.3.1)
-      connection_pool (>= 2.2.5)
-      drb
-      i18n (>= 1.6, < 2)
-      logger (>= 1.4.2)
-      minitest (>= 5.1)
-      securerandom (>= 0.3)
-      tzinfo (~> 2.0, >= 2.0.5)
-    appraisal (2.5.0)
-      bundler
-      rake
-      thor (>= 0.14.0)
-    ast (2.4.3)
-    base64 (0.3.0)
-    benchmark (0.5.0)
-    bigdecimal (4.0.1)
-    builder (3.3.0)
-    cgi (0.5.1)
-    concurrent-ruby (1.3.6)
-    connection_pool (3.0.2)
-    crass (1.0.6)
-    date (3.5.1)
-    diff-lcs (1.6.2)
-    drb (2.2.3)
-    erb (6.0.1)
-    erubi (1.13.1)
-    factory_bot (6.5.6)
-      activesupport (>= 6.1.0)
-    globalid (1.3.0)
-      activesupport (>= 6.1)
-    i18n (1.14.7)
-      concurrent-ruby (~> 1.0)
-    io-console (0.8.2)
-    irb (1.16.0)
-      pp (>= 0.6.0)
-      rdoc (>= 4.0.0)
-      reline (>= 0.4.2)
-    json (2.18.0)
-    language_server-protocol (3.17.0.5)
-    lint_roller (1.1.0)
-    logger (1.7.0)
-    loofah (2.25.0)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.12.0)
-    mail (2.9.0)
-      logger
-      mini_mime (>= 0.1.1)
-      net-imap
-      net-pop
-      net-smtp
-    marcel (1.1.0)
-    mini_mime (1.1.5)
-    minitest (6.0.0)
-      prism (~> 1.5)
-    net-imap (0.6.2)
-      date
-      net-protocol
-    net-pop (0.1.2)
-      net-protocol
-    net-protocol (0.2.2)
-      timeout
-    net-smtp (0.5.1)
-      net-protocol
-    nio4r (2.7.5)
-    nokogiri (1.18.10-arm64-darwin)
-      racc (~> 1.4)
-    nokogiri (1.18.10-x86_64-linux-gnu)
-      racc (~> 1.4)
-    parallel (1.27.0)
-    parser (3.3.10.0)
-      ast (~> 2.4.1)
-      racc
-    pp (0.6.3)
-      prettyprint
-    prettyprint (0.2.0)
-    prism (1.7.0)
-    psych (5.3.1)
-      date
-      stringio
-    puma (7.1.0)
-      nio4r (~> 2.0)
-    racc (1.8.1)
-    rack (3.2.4)
-    rack-session (2.1.1)
-      base64 (>= 0.1.0)
-      rack (>= 3.0.0)
-    rack-test (2.2.0)
-      rack (>= 1.3)
-    rackup (2.3.1)
-      rack (>= 3)
-    rails (7.2.3)
-      actioncable (= 7.2.3)
-      actionmailbox (= 7.2.3)
-      actionmailer (= 7.2.3)
-      actionpack (= 7.2.3)
-      actiontext (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activemodel (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      bundler (>= 1.15.0)
-      railties (= 7.2.3)
-    rails-dom-testing (2.3.0)
-      activesupport (>= 5.0.0)
-      minitest
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.6.2)
-      loofah (~> 2.21)
-      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      irb (~> 1.13)
-      rackup (>= 1.0.0)
-      rake (>= 12.2)
-      thor (~> 1.0, >= 1.2.2)
-      tsort (>= 0.2)
-      zeitwerk (~> 2.6)
-    rainbow (3.1.1)
-    rake (13.3.1)
-    rdoc (7.0.1)
-      erb
-      psych (>= 4.0.0)
-      tsort
-    regexp_parser (2.11.3)
-    reline (0.6.3)
-      io-console (~> 0.5)
-    request_store (1.7.0)
-      rack (>= 1.4)
-    rspec (3.13.2)
-      rspec-core (~> 3.13.0)
-      rspec-expectations (~> 3.13.0)
-      rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.6)
-      rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.5)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.7)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-support (3.13.6)
-    rubocop (1.82.0)
-      json (~> 2.3)
-      language_server-protocol (~> 3.17.0.2)
-      lint_roller (~> 1.1.0)
-      parallel (~> 1.10)
-      parser (>= 3.3.0.2)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.48.0, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.48.0)
-      parser (>= 3.3.7.2)
-      prism (~> 1.4)
-    rubocop-factory_bot (2.28.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-    rubocop-performance (1.26.1)
-      lint_roller (~> 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.47.1, < 2.0)
-    rubocop-rails (2.34.2)
-      activesupport (>= 4.2.0)
-      lint_roller (~> 1.1)
-      rack (>= 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.44.0, < 2.0)
-    rubocop-rspec (3.8.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.81)
-    rubocop-rspec_rails (2.32.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-      rubocop-rspec (~> 3.5)
-    ruby-progressbar (1.13.0)
-    securerandom (0.4.1)
-    sqlite3 (2.8.1-arm64-darwin)
-    sqlite3 (2.8.1-x86_64-linux-gnu)
-    stringio (3.2.0)
-    thor (1.4.0)
-    timeout (0.6.0)
-    tsort (0.2.0)
-    tzinfo (2.0.6)
-      concurrent-ruby (~> 1.0)
-    unicode-display_width (3.2.0)
-      unicode-emoji (~> 4.1)
-    unicode-emoji (4.2.0)
-    useragent (0.16.11)
-    websocket-driver (0.8.0)
-      base64
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-    zeitwerk (2.7.4)
-
-PLATFORMS
-  arm64-darwin-24
-  x86_64-linux
-
-DEPENDENCIES
-  appraisal
-  factory_bot
-  puma
-  rails (~> 7.2)
-  rake
-  rspec
-  rubocop
-  rubocop-factory_bot
-  rubocop-performance
-  rubocop-rails
-  rubocop-rspec
-  rubocop-rspec_rails
-  simple_master!
-  sqlite3 (~> 2.1)
-
-BUNDLED WITH
-   2.7.1
diff --git a/gemfiles/rails_7_0.gemfile.lock b/gemfiles/rails_7_0.gemfile.lock
deleted file mode 100644
index bd69f57..0000000
--- a/gemfiles/rails_7_0.gemfile.lock
+++ /dev/null
@@ -1,293 +0,0 @@
-PATH
-  remote: ..
-  specs:
-    simple_master (0.1.0)
-      activerecord (>= 7.0)
-      activesupport (>= 7.0)
-      request_store (>= 1.0)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actioncable (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
-      zeitwerk (~> 2.6)
-    actionmailbox (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-    actionmailer (7.2.3)
-      actionpack (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-      rails-dom-testing (~> 2.2)
-    actionpack (7.2.3)
-      actionview (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      nokogiri (>= 1.8.5)
-      racc
-      rack (>= 2.2.4, < 3.3)
-      rack-session (>= 1.0.1)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-      useragent (~> 0.16)
-    actiontext (7.2.3)
-      actionpack (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.6.0)
-      nokogiri (>= 1.8.5)
-    actionview (7.2.3)
-      activesupport (= 7.2.3)
-      builder (~> 3.1)
-      cgi
-      erubi (~> 1.11)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-    activejob (7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.3.6)
-    activemodel (7.2.3)
-      activesupport (= 7.2.3)
-    activerecord (7.2.3)
-      activemodel (= 7.2.3)
-      activesupport (= 7.2.3)
-      timeout (>= 0.4.0)
-    activestorage (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activesupport (= 7.2.3)
-      marcel (~> 1.0)
-    activesupport (7.2.3)
-      base64
-      benchmark (>= 0.3)
-      bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.3.1)
-      connection_pool (>= 2.2.5)
-      drb
-      i18n (>= 1.6, < 2)
-      logger (>= 1.4.2)
-      minitest (>= 5.1)
-      securerandom (>= 0.3)
-      tzinfo (~> 2.0, >= 2.0.5)
-    appraisal (2.5.0)
-      bundler
-      rake
-      thor (>= 0.14.0)
-    ast (2.4.3)
-    base64 (0.3.0)
-    benchmark (0.5.0)
-    bigdecimal (4.0.1)
-    builder (3.3.0)
-    cgi (0.5.1)
-    concurrent-ruby (1.3.6)
-    connection_pool (3.0.2)
-    crass (1.0.6)
-    date (3.5.1)
-    diff-lcs (1.6.2)
-    drb (2.2.3)
-    erb (6.0.1)
-    erubi (1.13.1)
-    factory_bot (6.5.6)
-      activesupport (>= 6.1.0)
-    globalid (1.3.0)
-      activesupport (>= 6.1)
-    i18n (1.14.7)
-      concurrent-ruby (~> 1.0)
-    io-console (0.8.2)
-    irb (1.16.0)
-      pp (>= 0.6.0)
-      rdoc (>= 4.0.0)
-      reline (>= 0.4.2)
-    json (2.18.0)
-    language_server-protocol (3.17.0.5)
-    lint_roller (1.1.0)
-    logger (1.7.0)
-    loofah (2.25.0)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.12.0)
-    mail (2.9.0)
-      logger
-      mini_mime (>= 0.1.1)
-      net-imap
-      net-pop
-      net-smtp
-    marcel (1.1.0)
-    mini_mime (1.1.5)
-    minitest (6.0.0)
-      prism (~> 1.5)
-    net-imap (0.6.2)
-      date
-      net-protocol
-    net-pop (0.1.2)
-      net-protocol
-    net-protocol (0.2.2)
-      timeout
-    net-smtp (0.5.1)
-      net-protocol
-    nio4r (2.7.5)
-    nokogiri (1.18.10-arm64-darwin)
-      racc (~> 1.4)
-    parallel (1.27.0)
-    parser (3.3.10.0)
-      ast (~> 2.4.1)
-      racc
-    pp (0.6.3)
-      prettyprint
-    prettyprint (0.2.0)
-    prism (1.7.0)
-    psych (5.3.1)
-      date
-      stringio
-    puma (7.1.0)
-      nio4r (~> 2.0)
-    racc (1.8.1)
-    rack (3.2.4)
-    rack-session (2.1.1)
-      base64 (>= 0.1.0)
-      rack (>= 3.0.0)
-    rack-test (2.2.0)
-      rack (>= 1.3)
-    rackup (2.3.1)
-      rack (>= 3)
-    rails (7.2.3)
-      actioncable (= 7.2.3)
-      actionmailbox (= 7.2.3)
-      actionmailer (= 7.2.3)
-      actionpack (= 7.2.3)
-      actiontext (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activemodel (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      bundler (>= 1.15.0)
-      railties (= 7.2.3)
-    rails-dom-testing (2.3.0)
-      activesupport (>= 5.0.0)
-      minitest
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.6.2)
-      loofah (~> 2.21)
-      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      irb (~> 1.13)
-      rackup (>= 1.0.0)
-      rake (>= 12.2)
-      thor (~> 1.0, >= 1.2.2)
-      tsort (>= 0.2)
-      zeitwerk (~> 2.6)
-    rainbow (3.1.1)
-    rake (13.3.1)
-    rdoc (7.0.1)
-      erb
-      psych (>= 4.0.0)
-      tsort
-    regexp_parser (2.11.3)
-    reline (0.6.3)
-      io-console (~> 0.5)
-    request_store (1.7.0)
-      rack (>= 1.4)
-    rspec (3.13.2)
-      rspec-core (~> 3.13.0)
-      rspec-expectations (~> 3.13.0)
-      rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.6)
-      rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.5)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.7)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-support (3.13.6)
-    rubocop (1.82.1)
-      json (~> 2.3)
-      language_server-protocol (~> 3.17.0.2)
-      lint_roller (~> 1.1.0)
-      parallel (~> 1.10)
-      parser (>= 3.3.0.2)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.48.0, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.48.0)
-      parser (>= 3.3.7.2)
-      prism (~> 1.4)
-    rubocop-factory_bot (2.28.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-    rubocop-performance (1.26.1)
-      lint_roller (~> 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.47.1, < 2.0)
-    rubocop-rails (2.34.2)
-      activesupport (>= 4.2.0)
-      lint_roller (~> 1.1)
-      rack (>= 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.44.0, < 2.0)
-    rubocop-rspec (3.8.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.81)
-    rubocop-rspec_rails (2.32.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-      rubocop-rspec (~> 3.5)
-    ruby-progressbar (1.13.0)
-    securerandom (0.4.1)
-    sqlite3 (2.8.1-arm64-darwin)
-    stringio (3.2.0)
-    thor (1.4.0)
-    timeout (0.6.0)
-    tsort (0.2.0)
-    tzinfo (2.0.6)
-      concurrent-ruby (~> 1.0)
-    unicode-display_width (3.2.0)
-      unicode-emoji (~> 4.1)
-    unicode-emoji (4.2.0)
-    useragent (0.16.11)
-    websocket-driver (0.8.0)
-      base64
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-    zeitwerk (2.7.4)
-
-PLATFORMS
-  arm64-darwin-24
-
-DEPENDENCIES
-  appraisal
-  factory_bot
-  puma
-  rails (~> 7.0)
-  rake
-  rspec
-  rubocop
-  rubocop-factory_bot
-  rubocop-performance
-  rubocop-rails
-  rubocop-rspec
-  rubocop-rspec_rails
-  simple_master!
-  sqlite3 (~> 2.1)
-
-BUNDLED WITH
-   2.7.1
diff --git a/gemfiles/rails_7_1.gemfile.lock b/gemfiles/rails_7_1.gemfile.lock
deleted file mode 100644
index 1d2dcdf..0000000
--- a/gemfiles/rails_7_1.gemfile.lock
+++ /dev/null
@@ -1,293 +0,0 @@
-PATH
-  remote: ..
-  specs:
-    simple_master (0.1.0)
-      activerecord (>= 7.0)
-      activesupport (>= 7.0)
-      request_store (>= 1.0)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actioncable (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
-      zeitwerk (~> 2.6)
-    actionmailbox (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-    actionmailer (7.2.3)
-      actionpack (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-      rails-dom-testing (~> 2.2)
-    actionpack (7.2.3)
-      actionview (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      nokogiri (>= 1.8.5)
-      racc
-      rack (>= 2.2.4, < 3.3)
-      rack-session (>= 1.0.1)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-      useragent (~> 0.16)
-    actiontext (7.2.3)
-      actionpack (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.6.0)
-      nokogiri (>= 1.8.5)
-    actionview (7.2.3)
-      activesupport (= 7.2.3)
-      builder (~> 3.1)
-      cgi
-      erubi (~> 1.11)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-    activejob (7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.3.6)
-    activemodel (7.2.3)
-      activesupport (= 7.2.3)
-    activerecord (7.2.3)
-      activemodel (= 7.2.3)
-      activesupport (= 7.2.3)
-      timeout (>= 0.4.0)
-    activestorage (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activesupport (= 7.2.3)
-      marcel (~> 1.0)
-    activesupport (7.2.3)
-      base64
-      benchmark (>= 0.3)
-      bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.3.1)
-      connection_pool (>= 2.2.5)
-      drb
-      i18n (>= 1.6, < 2)
-      logger (>= 1.4.2)
-      minitest (>= 5.1)
-      securerandom (>= 0.3)
-      tzinfo (~> 2.0, >= 2.0.5)
-    appraisal (2.5.0)
-      bundler
-      rake
-      thor (>= 0.14.0)
-    ast (2.4.3)
-    base64 (0.3.0)
-    benchmark (0.5.0)
-    bigdecimal (4.0.1)
-    builder (3.3.0)
-    cgi (0.5.1)
-    concurrent-ruby (1.3.6)
-    connection_pool (3.0.2)
-    crass (1.0.6)
-    date (3.5.1)
-    diff-lcs (1.6.2)
-    drb (2.2.3)
-    erb (6.0.1)
-    erubi (1.13.1)
-    factory_bot (6.5.6)
-      activesupport (>= 6.1.0)
-    globalid (1.3.0)
-      activesupport (>= 6.1)
-    i18n (1.14.7)
-      concurrent-ruby (~> 1.0)
-    io-console (0.8.2)
-    irb (1.16.0)
-      pp (>= 0.6.0)
-      rdoc (>= 4.0.0)
-      reline (>= 0.4.2)
-    json (2.18.0)
-    language_server-protocol (3.17.0.5)
-    lint_roller (1.1.0)
-    logger (1.7.0)
-    loofah (2.25.0)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.12.0)
-    mail (2.9.0)
-      logger
-      mini_mime (>= 0.1.1)
-      net-imap
-      net-pop
-      net-smtp
-    marcel (1.1.0)
-    mini_mime (1.1.5)
-    minitest (6.0.0)
-      prism (~> 1.5)
-    net-imap (0.6.2)
-      date
-      net-protocol
-    net-pop (0.1.2)
-      net-protocol
-    net-protocol (0.2.2)
-      timeout
-    net-smtp (0.5.1)
-      net-protocol
-    nio4r (2.7.5)
-    nokogiri (1.18.10-arm64-darwin)
-      racc (~> 1.4)
-    parallel (1.27.0)
-    parser (3.3.10.0)
-      ast (~> 2.4.1)
-      racc
-    pp (0.6.3)
-      prettyprint
-    prettyprint (0.2.0)
-    prism (1.7.0)
-    psych (5.3.1)
-      date
-      stringio
-    puma (7.1.0)
-      nio4r (~> 2.0)
-    racc (1.8.1)
-    rack (3.2.4)
-    rack-session (2.1.1)
-      base64 (>= 0.1.0)
-      rack (>= 3.0.0)
-    rack-test (2.2.0)
-      rack (>= 1.3)
-    rackup (2.3.1)
-      rack (>= 3)
-    rails (7.2.3)
-      actioncable (= 7.2.3)
-      actionmailbox (= 7.2.3)
-      actionmailer (= 7.2.3)
-      actionpack (= 7.2.3)
-      actiontext (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activemodel (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      bundler (>= 1.15.0)
-      railties (= 7.2.3)
-    rails-dom-testing (2.3.0)
-      activesupport (>= 5.0.0)
-      minitest
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.6.2)
-      loofah (~> 2.21)
-      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      irb (~> 1.13)
-      rackup (>= 1.0.0)
-      rake (>= 12.2)
-      thor (~> 1.0, >= 1.2.2)
-      tsort (>= 0.2)
-      zeitwerk (~> 2.6)
-    rainbow (3.1.1)
-    rake (13.3.1)
-    rdoc (7.0.1)
-      erb
-      psych (>= 4.0.0)
-      tsort
-    regexp_parser (2.11.3)
-    reline (0.6.3)
-      io-console (~> 0.5)
-    request_store (1.7.0)
-      rack (>= 1.4)
-    rspec (3.13.2)
-      rspec-core (~> 3.13.0)
-      rspec-expectations (~> 3.13.0)
-      rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.6)
-      rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.5)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.7)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-support (3.13.6)
-    rubocop (1.82.1)
-      json (~> 2.3)
-      language_server-protocol (~> 3.17.0.2)
-      lint_roller (~> 1.1.0)
-      parallel (~> 1.10)
-      parser (>= 3.3.0.2)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.48.0, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.48.0)
-      parser (>= 3.3.7.2)
-      prism (~> 1.4)
-    rubocop-factory_bot (2.28.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-    rubocop-performance (1.26.1)
-      lint_roller (~> 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.47.1, < 2.0)
-    rubocop-rails (2.34.2)
-      activesupport (>= 4.2.0)
-      lint_roller (~> 1.1)
-      rack (>= 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.44.0, < 2.0)
-    rubocop-rspec (3.8.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.81)
-    rubocop-rspec_rails (2.32.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-      rubocop-rspec (~> 3.5)
-    ruby-progressbar (1.13.0)
-    securerandom (0.4.1)
-    sqlite3 (2.8.1-arm64-darwin)
-    stringio (3.2.0)
-    thor (1.4.0)
-    timeout (0.6.0)
-    tsort (0.2.0)
-    tzinfo (2.0.6)
-      concurrent-ruby (~> 1.0)
-    unicode-display_width (3.2.0)
-      unicode-emoji (~> 4.1)
-    unicode-emoji (4.2.0)
-    useragent (0.16.11)
-    websocket-driver (0.8.0)
-      base64
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-    zeitwerk (2.7.4)
-
-PLATFORMS
-  arm64-darwin-24
-
-DEPENDENCIES
-  appraisal
-  factory_bot
-  puma
-  rails (~> 7.1)
-  rake
-  rspec
-  rubocop
-  rubocop-factory_bot
-  rubocop-performance
-  rubocop-rails
-  rubocop-rspec
-  rubocop-rspec_rails
-  simple_master!
-  sqlite3 (~> 2.1)
-
-BUNDLED WITH
-   2.7.1
diff --git a/gemfiles/rails_7_2.gemfile.lock b/gemfiles/rails_7_2.gemfile.lock
deleted file mode 100644
index c298d3d..0000000
--- a/gemfiles/rails_7_2.gemfile.lock
+++ /dev/null
@@ -1,293 +0,0 @@
-PATH
-  remote: ..
-  specs:
-    simple_master (0.1.0)
-      activerecord (>= 7.0)
-      activesupport (>= 7.0)
-      request_store (>= 1.0)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actioncable (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
-      zeitwerk (~> 2.6)
-    actionmailbox (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-    actionmailer (7.2.3)
-      actionpack (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activesupport (= 7.2.3)
-      mail (>= 2.8.0)
-      rails-dom-testing (~> 2.2)
-    actionpack (7.2.3)
-      actionview (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      nokogiri (>= 1.8.5)
-      racc
-      rack (>= 2.2.4, < 3.3)
-      rack-session (>= 1.0.1)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-      useragent (~> 0.16)
-    actiontext (7.2.3)
-      actionpack (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.6.0)
-      nokogiri (>= 1.8.5)
-    actionview (7.2.3)
-      activesupport (= 7.2.3)
-      builder (~> 3.1)
-      cgi
-      erubi (~> 1.11)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-    activejob (7.2.3)
-      activesupport (= 7.2.3)
-      globalid (>= 0.3.6)
-    activemodel (7.2.3)
-      activesupport (= 7.2.3)
-    activerecord (7.2.3)
-      activemodel (= 7.2.3)
-      activesupport (= 7.2.3)
-      timeout (>= 0.4.0)
-    activestorage (7.2.3)
-      actionpack (= 7.2.3)
-      activejob (= 7.2.3)
-      activerecord (= 7.2.3)
-      activesupport (= 7.2.3)
-      marcel (~> 1.0)
-    activesupport (7.2.3)
-      base64
-      benchmark (>= 0.3)
-      bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.3.1)
-      connection_pool (>= 2.2.5)
-      drb
-      i18n (>= 1.6, < 2)
-      logger (>= 1.4.2)
-      minitest (>= 5.1)
-      securerandom (>= 0.3)
-      tzinfo (~> 2.0, >= 2.0.5)
-    appraisal (2.5.0)
-      bundler
-      rake
-      thor (>= 0.14.0)
-    ast (2.4.3)
-    base64 (0.3.0)
-    benchmark (0.5.0)
-    bigdecimal (4.0.1)
-    builder (3.3.0)
-    cgi (0.5.1)
-    concurrent-ruby (1.3.6)
-    connection_pool (3.0.2)
-    crass (1.0.6)
-    date (3.5.1)
-    diff-lcs (1.6.2)
-    drb (2.2.3)
-    erb (6.0.1)
-    erubi (1.13.1)
-    factory_bot (6.5.6)
-      activesupport (>= 6.1.0)
-    globalid (1.3.0)
-      activesupport (>= 6.1)
-    i18n (1.14.7)
-      concurrent-ruby (~> 1.0)
-    io-console (0.8.2)
-    irb (1.16.0)
-      pp (>= 0.6.0)
-      rdoc (>= 4.0.0)
-      reline (>= 0.4.2)
-    json (2.18.0)
-    language_server-protocol (3.17.0.5)
-    lint_roller (1.1.0)
-    logger (1.7.0)
-    loofah (2.25.0)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.12.0)
-    mail (2.9.0)
-      logger
-      mini_mime (>= 0.1.1)
-      net-imap
-      net-pop
-      net-smtp
-    marcel (1.1.0)
-    mini_mime (1.1.5)
-    minitest (6.0.0)
-      prism (~> 1.5)
-    net-imap (0.6.2)
-      date
-      net-protocol
-    net-pop (0.1.2)
-      net-protocol
-    net-protocol (0.2.2)
-      timeout
-    net-smtp (0.5.1)
-      net-protocol
-    nio4r (2.7.5)
-    nokogiri (1.18.10-arm64-darwin)
-      racc (~> 1.4)
-    parallel (1.27.0)
-    parser (3.3.10.0)
-      ast (~> 2.4.1)
-      racc
-    pp (0.6.3)
-      prettyprint
-    prettyprint (0.2.0)
-    prism (1.7.0)
-    psych (5.3.1)
-      date
-      stringio
-    puma (7.1.0)
-      nio4r (~> 2.0)
-    racc (1.8.1)
-    rack (3.2.4)
-    rack-session (2.1.1)
-      base64 (>= 0.1.0)
-      rack (>= 3.0.0)
-    rack-test (2.2.0)
-      rack (>= 1.3)
-    rackup (2.3.1)
-      rack (>= 3)
-    rails (7.2.3)
-      actioncable (= 7.2.3)
-      actionmailbox (= 7.2.3)
-      actionmailer (= 7.2.3)
-      actionpack (= 7.2.3)
-      actiontext (= 7.2.3)
-      actionview (= 7.2.3)
-      activejob (= 7.2.3)
-      activemodel (= 7.2.3)
-      activerecord (= 7.2.3)
-      activestorage (= 7.2.3)
-      activesupport (= 7.2.3)
-      bundler (>= 1.15.0)
-      railties (= 7.2.3)
-    rails-dom-testing (2.3.0)
-      activesupport (>= 5.0.0)
-      minitest
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.6.2)
-      loofah (~> 2.21)
-      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (7.2.3)
-      actionpack (= 7.2.3)
-      activesupport (= 7.2.3)
-      cgi
-      irb (~> 1.13)
-      rackup (>= 1.0.0)
-      rake (>= 12.2)
-      thor (~> 1.0, >= 1.2.2)
-      tsort (>= 0.2)
-      zeitwerk (~> 2.6)
-    rainbow (3.1.1)
-    rake (13.3.1)
-    rdoc (7.0.1)
-      erb
-      psych (>= 4.0.0)
-      tsort
-    regexp_parser (2.11.3)
-    reline (0.6.3)
-      io-console (~> 0.5)
-    request_store (1.7.0)
-      rack (>= 1.4)
-    rspec (3.13.2)
-      rspec-core (~> 3.13.0)
-      rspec-expectations (~> 3.13.0)
-      rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.6)
-      rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.5)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.7)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-support (3.13.6)
-    rubocop (1.82.1)
-      json (~> 2.3)
-      language_server-protocol (~> 3.17.0.2)
-      lint_roller (~> 1.1.0)
-      parallel (~> 1.10)
-      parser (>= 3.3.0.2)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.48.0, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.48.0)
-      parser (>= 3.3.7.2)
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-    rubocop-factory_bot (2.28.0)
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-      rubocop (~> 1.72, >= 1.72.1)
-    rubocop-performance (1.26.1)
-      lint_roller (~> 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.47.1, < 2.0)
-    rubocop-rails (2.34.2)
-      activesupport (>= 4.2.0)
-      lint_roller (~> 1.1)
-      rack (>= 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.44.0, < 2.0)
-    rubocop-rspec (3.8.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.81)
-    rubocop-rspec_rails (2.32.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-      rubocop-rspec (~> 3.5)
-    ruby-progressbar (1.13.0)
-    securerandom (0.4.1)
-    sqlite3 (2.8.1-arm64-darwin)
-    stringio (3.2.0)
-    thor (1.4.0)
-    timeout (0.6.0)
-    tsort (0.2.0)
-    tzinfo (2.0.6)
-      concurrent-ruby (~> 1.0)
-    unicode-display_width (3.2.0)
-      unicode-emoji (~> 4.1)
-    unicode-emoji (4.2.0)
-    useragent (0.16.11)
-    websocket-driver (0.8.0)
-      base64
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-    zeitwerk (2.7.4)
-
-PLATFORMS
-  arm64-darwin-24
-
-DEPENDENCIES
-  appraisal
-  factory_bot
-  puma
-  rails (~> 7.2)
-  rake
-  rspec
-  rubocop
-  rubocop-factory_bot
-  rubocop-performance
-  rubocop-rails
-  rubocop-rspec
-  rubocop-rspec_rails
-  simple_master!
-  sqlite3 (~> 2.1)
-
-BUNDLED WITH
-   2.7.1
diff --git a/gemfiles/rails_8_0.gemfile.lock b/gemfiles/rails_8_0.gemfile.lock
deleted file mode 100644
index 5a25c24..0000000
--- a/gemfiles/rails_8_0.gemfile.lock
+++ /dev/null
@@ -1,292 +0,0 @@
-PATH
-  remote: ..
-  specs:
-    simple_master (0.1.0)
-      activerecord (>= 7.0)
-      activesupport (>= 7.0)
-      request_store (>= 1.0)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    action_text-trix (2.1.15)
-      railties
-    actioncable (8.1.1)
-      actionpack (= 8.1.1)
-      activesupport (= 8.1.1)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
-      zeitwerk (~> 2.6)
-    actionmailbox (8.1.1)
-      actionpack (= 8.1.1)
-      activejob (= 8.1.1)
-      activerecord (= 8.1.1)
-      activestorage (= 8.1.1)
-      activesupport (= 8.1.1)
-      mail (>= 2.8.0)
-    actionmailer (8.1.1)
-      actionpack (= 8.1.1)
-      actionview (= 8.1.1)
-      activejob (= 8.1.1)
-      activesupport (= 8.1.1)
-      mail (>= 2.8.0)
-      rails-dom-testing (~> 2.2)
-    actionpack (8.1.1)
-      actionview (= 8.1.1)
-      activesupport (= 8.1.1)
-      nokogiri (>= 1.8.5)
-      rack (>= 2.2.4)
-      rack-session (>= 1.0.1)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-      useragent (~> 0.16)
-    actiontext (8.1.1)
-      action_text-trix (~> 2.1.15)
-      actionpack (= 8.1.1)
-      activerecord (= 8.1.1)
-      activestorage (= 8.1.1)
-      activesupport (= 8.1.1)
-      globalid (>= 0.6.0)
-      nokogiri (>= 1.8.5)
-    actionview (8.1.1)
-      activesupport (= 8.1.1)
-      builder (~> 3.1)
-      erubi (~> 1.11)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-    activejob (8.1.1)
-      activesupport (= 8.1.1)
-      globalid (>= 0.3.6)
-    activemodel (8.1.1)
-      activesupport (= 8.1.1)
-    activerecord (8.1.1)
-      activemodel (= 8.1.1)
-      activesupport (= 8.1.1)
-      timeout (>= 0.4.0)
-    activestorage (8.1.1)
-      actionpack (= 8.1.1)
-      activejob (= 8.1.1)
-      activerecord (= 8.1.1)
-      activesupport (= 8.1.1)
-      marcel (~> 1.0)
-    activesupport (8.1.1)
-      base64
-      bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.3.1)
-      connection_pool (>= 2.2.5)
-      drb
-      i18n (>= 1.6, < 2)
-      json
-      logger (>= 1.4.2)
-      minitest (>= 5.1)
-      securerandom (>= 0.3)
-      tzinfo (~> 2.0, >= 2.0.5)
-      uri (>= 0.13.1)
-    appraisal (2.5.0)
-      bundler
-      rake
-      thor (>= 0.14.0)
-    ast (2.4.3)
-    base64 (0.3.0)
-    bigdecimal (4.0.1)
-    builder (3.3.0)
-    concurrent-ruby (1.3.6)
-    connection_pool (3.0.2)
-    crass (1.0.6)
-    date (3.5.1)
-    diff-lcs (1.6.2)
-    drb (2.2.3)
-    erb (6.0.1)
-    erubi (1.13.1)
-    factory_bot (6.5.6)
-      activesupport (>= 6.1.0)
-    globalid (1.3.0)
-      activesupport (>= 6.1)
-    i18n (1.14.7)
-      concurrent-ruby (~> 1.0)
-    io-console (0.8.2)
-    irb (1.16.0)
-      pp (>= 0.6.0)
-      rdoc (>= 4.0.0)
-      reline (>= 0.4.2)
-    json (2.18.0)
-    language_server-protocol (3.17.0.5)
-    lint_roller (1.1.0)
-    logger (1.7.0)
-    loofah (2.25.0)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.12.0)
-    mail (2.9.0)
-      logger
-      mini_mime (>= 0.1.1)
-      net-imap
-      net-pop
-      net-smtp
-    marcel (1.1.0)
-    mini_mime (1.1.5)
-    minitest (6.0.0)
-      prism (~> 1.5)
-    net-imap (0.6.2)
-      date
-      net-protocol
-    net-pop (0.1.2)
-      net-protocol
-    net-protocol (0.2.2)
-      timeout
-    net-smtp (0.5.1)
-      net-protocol
-    nio4r (2.7.5)
-    nokogiri (1.18.10-arm64-darwin)
-      racc (~> 1.4)
-    parallel (1.27.0)
-    parser (3.3.10.0)
-      ast (~> 2.4.1)
-      racc
-    pp (0.6.3)
-      prettyprint
-    prettyprint (0.2.0)
-    prism (1.7.0)
-    psych (5.3.1)
-      date
-      stringio
-    puma (7.1.0)
-      nio4r (~> 2.0)
-    racc (1.8.1)
-    rack (3.2.4)
-    rack-session (2.1.1)
-      base64 (>= 0.1.0)
-      rack (>= 3.0.0)
-    rack-test (2.2.0)
-      rack (>= 1.3)
-    rackup (2.3.1)
-      rack (>= 3)
-    rails (8.1.1)
-      actioncable (= 8.1.1)
-      actionmailbox (= 8.1.1)
-      actionmailer (= 8.1.1)
-      actionpack (= 8.1.1)
-      actiontext (= 8.1.1)
-      actionview (= 8.1.1)
-      activejob (= 8.1.1)
-      activemodel (= 8.1.1)
-      activerecord (= 8.1.1)
-      activestorage (= 8.1.1)
-      activesupport (= 8.1.1)
-      bundler (>= 1.15.0)
-      railties (= 8.1.1)
-    rails-dom-testing (2.3.0)
-      activesupport (>= 5.0.0)
-      minitest
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.6.2)
-      loofah (~> 2.21)
-      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (8.1.1)
-      actionpack (= 8.1.1)
-      activesupport (= 8.1.1)
-      irb (~> 1.13)
-      rackup (>= 1.0.0)
-      rake (>= 12.2)
-      thor (~> 1.0, >= 1.2.2)
-      tsort (>= 0.2)
-      zeitwerk (~> 2.6)
-    rainbow (3.1.1)
-    rake (13.3.1)
-    rdoc (7.0.1)
-      erb
-      psych (>= 4.0.0)
-      tsort
-    regexp_parser (2.11.3)
-    reline (0.6.3)
-      io-console (~> 0.5)
-    request_store (1.7.0)
-      rack (>= 1.4)
-    rspec (3.13.2)
-      rspec-core (~> 3.13.0)
-      rspec-expectations (~> 3.13.0)
-      rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.6)
-      rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.5)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
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-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-support (3.13.6)
-    rubocop (1.82.1)
-      json (~> 2.3)
-      language_server-protocol (~> 3.17.0.2)
-      lint_roller (~> 1.1.0)
-      parallel (~> 1.10)
-      parser (>= 3.3.0.2)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.48.0, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.48.0)
-      parser (>= 3.3.7.2)
-      prism (~> 1.4)
-    rubocop-factory_bot (2.28.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-    rubocop-performance (1.26.1)
-      lint_roller (~> 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.47.1, < 2.0)
-    rubocop-rails (2.34.2)
-      activesupport (>= 4.2.0)
-      lint_roller (~> 1.1)
-      rack (>= 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.44.0, < 2.0)
-    rubocop-rspec (3.8.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.81)
-    rubocop-rspec_rails (2.32.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-      rubocop-rspec (~> 3.5)
-    ruby-progressbar (1.13.0)
-    securerandom (0.4.1)
-    sqlite3 (2.8.1-arm64-darwin)
-    stringio (3.2.0)
-    thor (1.4.0)
-    timeout (0.6.0)
-    tsort (0.2.0)
-    tzinfo (2.0.6)
-      concurrent-ruby (~> 1.0)
-    unicode-display_width (3.2.0)
-      unicode-emoji (~> 4.1)
-    unicode-emoji (4.2.0)
-    uri (1.1.1)
-    useragent (0.16.11)
-    websocket-driver (0.8.0)
-      base64
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-    zeitwerk (2.7.4)
-
-PLATFORMS
-  arm64-darwin-24
-
-DEPENDENCIES
-  appraisal
-  factory_bot
-  puma
-  rails (~> 8.0)
-  rake
-  rspec
-  rubocop
-  rubocop-factory_bot
-  rubocop-performance
-  rubocop-rails
-  rubocop-rspec
-  rubocop-rspec_rails
-  simple_master!
-  sqlite3 (~> 2.1)
-
-BUNDLED WITH
-   2.7.1
diff --git a/gemfiles/rails_8_1.gemfile.lock b/gemfiles/rails_8_1.gemfile.lock
deleted file mode 100644
index 0a08924..0000000
--- a/gemfiles/rails_8_1.gemfile.lock
+++ /dev/null
@@ -1,292 +0,0 @@
-PATH
-  remote: ..
-  specs:
-    simple_master (0.1.0)
-      activerecord (>= 7.0)
-      activesupport (>= 7.0)
-      request_store (>= 1.0)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    action_text-trix (2.1.15)
-      railties
-    actioncable (8.1.1)
-      actionpack (= 8.1.1)
-      activesupport (= 8.1.1)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
-      zeitwerk (~> 2.6)
-    actionmailbox (8.1.1)
-      actionpack (= 8.1.1)
-      activejob (= 8.1.1)
-      activerecord (= 8.1.1)
-      activestorage (= 8.1.1)
-      activesupport (= 8.1.1)
-      mail (>= 2.8.0)
-    actionmailer (8.1.1)
-      actionpack (= 8.1.1)
-      actionview (= 8.1.1)
-      activejob (= 8.1.1)
-      activesupport (= 8.1.1)
-      mail (>= 2.8.0)
-      rails-dom-testing (~> 2.2)
-    actionpack (8.1.1)
-      actionview (= 8.1.1)
-      activesupport (= 8.1.1)
-      nokogiri (>= 1.8.5)
-      rack (>= 2.2.4)
-      rack-session (>= 1.0.1)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-      useragent (~> 0.16)
-    actiontext (8.1.1)
-      action_text-trix (~> 2.1.15)
-      actionpack (= 8.1.1)
-      activerecord (= 8.1.1)
-      activestorage (= 8.1.1)
-      activesupport (= 8.1.1)
-      globalid (>= 0.6.0)
-      nokogiri (>= 1.8.5)
-    actionview (8.1.1)
-      activesupport (= 8.1.1)
-      builder (~> 3.1)
-      erubi (~> 1.11)
-      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.6)
-    activejob (8.1.1)
-      activesupport (= 8.1.1)
-      globalid (>= 0.3.6)
-    activemodel (8.1.1)
-      activesupport (= 8.1.1)
-    activerecord (8.1.1)
-      activemodel (= 8.1.1)
-      activesupport (= 8.1.1)
-      timeout (>= 0.4.0)
-    activestorage (8.1.1)
-      actionpack (= 8.1.1)
-      activejob (= 8.1.1)
-      activerecord (= 8.1.1)
-      activesupport (= 8.1.1)
-      marcel (~> 1.0)
-    activesupport (8.1.1)
-      base64
-      bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.3.1)
-      connection_pool (>= 2.2.5)
-      drb
-      i18n (>= 1.6, < 2)
-      json
-      logger (>= 1.4.2)
-      minitest (>= 5.1)
-      securerandom (>= 0.3)
-      tzinfo (~> 2.0, >= 2.0.5)
-      uri (>= 0.13.1)
-    appraisal (2.5.0)
-      bundler
-      rake
-      thor (>= 0.14.0)
-    ast (2.4.3)
-    base64 (0.3.0)
-    bigdecimal (4.0.1)
-    builder (3.3.0)
-    concurrent-ruby (1.3.6)
-    connection_pool (3.0.2)
-    crass (1.0.6)
-    date (3.5.1)
-    diff-lcs (1.6.2)
-    drb (2.2.3)
-    erb (6.0.1)
-    erubi (1.13.1)
-    factory_bot (6.5.6)
-      activesupport (>= 6.1.0)
-    globalid (1.3.0)
-      activesupport (>= 6.1)
-    i18n (1.14.7)
-      concurrent-ruby (~> 1.0)
-    io-console (0.8.2)
-    irb (1.16.0)
-      pp (>= 0.6.0)
-      rdoc (>= 4.0.0)
-      reline (>= 0.4.2)
-    json (2.18.0)
-    language_server-protocol (3.17.0.5)
-    lint_roller (1.1.0)
-    logger (1.7.0)
-    loofah (2.25.0)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.12.0)
-    mail (2.9.0)
-      logger
-      mini_mime (>= 0.1.1)
-      net-imap
-      net-pop
-      net-smtp
-    marcel (1.1.0)
-    mini_mime (1.1.5)
-    minitest (6.0.0)
-      prism (~> 1.5)
-    net-imap (0.6.2)
-      date
-      net-protocol
-    net-pop (0.1.2)
-      net-protocol
-    net-protocol (0.2.2)
-      timeout
-    net-smtp (0.5.1)
-      net-protocol
-    nio4r (2.7.5)
-    nokogiri (1.18.10-arm64-darwin)
-      racc (~> 1.4)
-    parallel (1.27.0)
-    parser (3.3.10.0)
-      ast (~> 2.4.1)
-      racc
-    pp (0.6.3)
-      prettyprint
-    prettyprint (0.2.0)
-    prism (1.7.0)
-    psych (5.3.1)
-      date
-      stringio
-    puma (7.1.0)
-      nio4r (~> 2.0)
-    racc (1.8.1)
-    rack (3.2.4)
-    rack-session (2.1.1)
-      base64 (>= 0.1.0)
-      rack (>= 3.0.0)
-    rack-test (2.2.0)
-      rack (>= 1.3)
-    rackup (2.3.1)
-      rack (>= 3)
-    rails (8.1.1)
-      actioncable (= 8.1.1)
-      actionmailbox (= 8.1.1)
-      actionmailer (= 8.1.1)
-      actionpack (= 8.1.1)
-      actiontext (= 8.1.1)
-      actionview (= 8.1.1)
-      activejob (= 8.1.1)
-      activemodel (= 8.1.1)
-      activerecord (= 8.1.1)
-      activestorage (= 8.1.1)
-      activesupport (= 8.1.1)
-      bundler (>= 1.15.0)
-      railties (= 8.1.1)
-    rails-dom-testing (2.3.0)
-      activesupport (>= 5.0.0)
-      minitest
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.6.2)
-      loofah (~> 2.21)
-      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (8.1.1)
-      actionpack (= 8.1.1)
-      activesupport (= 8.1.1)
-      irb (~> 1.13)
-      rackup (>= 1.0.0)
-      rake (>= 12.2)
-      thor (~> 1.0, >= 1.2.2)
-      tsort (>= 0.2)
-      zeitwerk (~> 2.6)
-    rainbow (3.1.1)
-    rake (13.3.1)
-    rdoc (7.0.1)
-      erb
-      psych (>= 4.0.0)
-      tsort
-    regexp_parser (2.11.3)
-    reline (0.6.3)
-      io-console (~> 0.5)
-    request_store (1.7.0)
-      rack (>= 1.4)
-    rspec (3.13.2)
-      rspec-core (~> 3.13.0)
-      rspec-expectations (~> 3.13.0)
-      rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.6)
-      rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.5)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.7)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.13.0)
-    rspec-support (3.13.6)
-    rubocop (1.82.1)
-      json (~> 2.3)
-      language_server-protocol (~> 3.17.0.2)
-      lint_roller (~> 1.1.0)
-      parallel (~> 1.10)
-      parser (>= 3.3.0.2)
-      rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.48.0, < 2.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.48.0)
-      parser (>= 3.3.7.2)
-      prism (~> 1.4)
-    rubocop-factory_bot (2.28.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-    rubocop-performance (1.26.1)
-      lint_roller (~> 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.47.1, < 2.0)
-    rubocop-rails (2.34.2)
-      activesupport (>= 4.2.0)
-      lint_roller (~> 1.1)
-      rack (>= 1.1)
-      rubocop (>= 1.75.0, < 2.0)
-      rubocop-ast (>= 1.44.0, < 2.0)
-    rubocop-rspec (3.8.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.81)
-    rubocop-rspec_rails (2.32.0)
-      lint_roller (~> 1.1)
-      rubocop (~> 1.72, >= 1.72.1)
-      rubocop-rspec (~> 3.5)
-    ruby-progressbar (1.13.0)
-    securerandom (0.4.1)
-    sqlite3 (2.8.1-arm64-darwin)
-    stringio (3.2.0)
-    thor (1.4.0)
-    timeout (0.6.0)
-    tsort (0.2.0)
-    tzinfo (2.0.6)
-      concurrent-ruby (~> 1.0)
-    unicode-display_width (3.2.0)
-      unicode-emoji (~> 4.1)
-    unicode-emoji (4.2.0)
-    uri (1.1.1)
-    useragent (0.16.11)
-    websocket-driver (0.8.0)
-      base64
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
-    zeitwerk (2.7.4)
-
-PLATFORMS
-  arm64-darwin-24
-
-DEPENDENCIES
-  appraisal
-  factory_bot
-  puma
-  rails (~> 8.1)
-  rake
-  rspec
-  rubocop
-  rubocop-factory_bot
-  rubocop-performance
-  rubocop-rails
-  rubocop-rspec
-  rubocop-rspec_rails
-  simple_master!
-  sqlite3 (~> 2.1)
-
-BUNDLED WITH
-   2.7.1
diff --git a/lib/simple_master/master/queryable.rb b/lib/simple_master/master/queryable.rb
index 0401247..18bd189 100644
--- a/lib/simple_master/master/queryable.rb
+++ b/lib/simple_master/master/queryable.rb
@@ -37,11 +37,11 @@ def insert_queries(records, on_duplicate_key_update = false, batch_size: 10000)
               sql_column_methods
                 .zip(column_names)
                 .map { |method_name, column_name|
-                if [:updated_at, :created_at].include?(column_name)
-                  current_time
-                else
-                  record.send(method_name)
-                end
+                  if [:updated_at, :created_at].include?(column_name)
+                    current_time
+                  else
+                    record.send(method_name)
+                  end
               }.join(", ").then { "(#{_1})" }
             }.join(", \n")