diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4a76c67d..8e169e39 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,4 +1,3 @@
----
 name: tests
 on: [ push, pull_request ]
 jobs:
@@ -26,3 +25,14 @@ jobs:
           CLICOLOR_FORCE: 1
       - name: Cucumber
         run: bundle exec rake features
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.4'
+          bundler-cache: true
+      - name: Rubocop
+        run: bundle exec rake rubocop
diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 00000000..64372a56
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,6 @@
+inherit_from: .rubocop_todo.yml
+
+AllCops:
+  NewCops: disable
+  SuggestExtensions: false
+  TargetRubyVersion: 2.4
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 00000000..8165b482
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,1649 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config --auto-gen-only-exclude --exclude-limit 100 --no-offense-counts --no-auto-gen-timestamp`
+# using RuboCop version 1.81.7.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: TreatCommentsAsGroupSeparators, ConsiderPunctuation.
+Gemspec/OrderedDependencies:
+  Exclude:
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: outdent, indent
+Layout/AccessModifierIndentation:
+  Exclude:
+    - 'lib/stack_master/parameter_resolvers/security_group.rb'
+    - 'lib/stack_master/parameter_resolvers/sso_group_id.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: with_first_argument, with_fixed_indentation
+Layout/ArgumentAlignment:
+  Exclude:
+    - 'lib/stack_master/aws_driver/cloud_formation.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/config.rb'
+    - 'spec/stack_master/template_compilers/sparkle_formation_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/BlockEndNewline:
+  Exclude:
+    - 'spec/stack_master/change_set_spec.rb'
+    - 'spec/stack_master/commands/drift_spec.rb'
+    - 'spec/stack_master/paged_response_accumulator_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'spec/stack_master/stack_differ_spec.rb'
+    - 'spec/stack_master/stack_events/fetcher_spec.rb'
+    - 'spec/stack_master/stack_events/streamer_spec.rb'
+    - 'spec/stack_master/template_compilers/json_spec.rb'
+    - 'spec/stack_master/template_compilers/yaml_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/ClosingHeredocIndentation:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'spec/stack_master/parameter_validator_spec.rb'
+    - 'spec/stack_master/template_compilers/yaml_erb_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/ConditionPosition:
+  Exclude:
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/ElseAlignment:
+  Exclude:
+    - 'lib/stack_master/prompter.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'lib/stack_master/validator.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/EmptyLineAfterGuardClause:
+  Exclude:
+    - 'lib/stack_master.rb'
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_resolver.rb'
+    - 'lib/stack_master/parameter_resolvers/acm_certificate.rb'
+    - 'lib/stack_master/parameter_resolvers/env.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/parameter_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_pattern_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_values_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/number_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/string_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator.rb'
+    - 'lib/stack_master/stack.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/stack_differ.rb'
+    - 'lib/stack_master/stack_events/streamer.rb'
+    - 'lib/stack_master/stack_status.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/template_utils.rb'
+    - 'lib/stack_master/utils.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/EmptyLineAfterMagicComment:
+  Exclude:
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/EmptyLines:
+  Exclude:
+    - 'features/step_definitions/stack_steps.rb'
+    - 'spec/stack_master/parameter_resolvers/parameter_store_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: around, only_before
+Layout/EmptyLinesAroundAccessModifier:
+  Exclude:
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_resolvers/sso_group_id.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/EmptyLinesAroundArguments:
+  Exclude:
+    - 'lib/stack_master/config.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowAliasSyntax, AllowedMethods.
+# AllowedMethods: alias_method, public, protected, private
+Layout/EmptyLinesAroundAttributeAccessor:
+  Exclude:
+    - 'lib/stack_master.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, no_empty_lines
+Layout/EmptyLinesAroundBlockBody:
+  Exclude:
+    - 'lib/stack_master/sparkle_formation/template_file.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp-repeated.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample.rb'
+    - 'spec/stack_master/commands/delete_spec.rb'
+    - 'spec/stack_master/commands/init_spec.rb'
+    - 'spec/stack_master/commands/nag_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/commands/validate_spec.rb'
+    - 'spec/stack_master/parameter_loader_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/env_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/parameter_store_spec.rb'
+    - 'spec/stack_master/sns_topic_finder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_pattern_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/definitions_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/empty_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/number_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/state_builder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/string_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+    - 'spec/stack_master/template_compilers/cfndsl_spec.rb'
+    - 'spec/stack_master/template_compilers/json_spec.rb'
+    - 'spec/stack_master/template_compilers/yaml_spec.rb'
+    - 'spec/stack_master/validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty_lines, empty_lines_except_namespace, empty_lines_special, no_empty_lines, beginning_only, ending_only
+Layout/EmptyLinesAroundClassBody:
+  Exclude:
+    - 'lib/stack_master/aws_driver/cloud_formation.rb'
+    - 'lib/stack_master/commands/nag.rb'
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/parameter_resolvers/env.rb'
+    - 'lib/stack_master/parameter_resolvers/parameter_store.rb'
+    - 'lib/stack_master/sns_topic_finder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_pattern_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_values_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/empty_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/number_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/parameters_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/state_builder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/string_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_builder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator_factory.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/EmptyLinesAroundMethodBody:
+  Exclude:
+    - 'lib/stack_master/commands/delete.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyleAlignWith, Severity.
+# SupportedStylesAlignWith: keyword, variable, start_of_line
+Layout/EndAlignment:
+  Exclude:
+    - 'lib/stack_master/prompter.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'lib/stack_master/validator.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowForAlignment, AllowBeforeTrailingComments, ForceEqualSignAlignment.
+Layout/ExtraSpacing:
+  Exclude:
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: consistent, consistent_relative_to_receiver, special_for_inner_method_call, special_for_inner_method_call_in_parentheses
+Layout/FirstArgumentIndentation:
+  Exclude:
+    - 'spec/stack_master/commands/drift_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: special_inside_parentheses, consistent, align_brackets
+Layout/FirstArrayElementIndentation:
+  Exclude:
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator_factory.rb'
+    - 'spec/stack_master/cloudformation_interpolating_eruby_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+    - 'spec/stack_master/stack_definition_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/utils_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: special_inside_parentheses, consistent, align_braces
+Layout/FirstHashElementIndentation:
+  Exclude:
+    - 'features/step_definitions/asume_role_steps.rb'
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/parameter_resolvers/parameter_store.rb'
+    - 'lib/stack_master/role_assumer.rb'
+    - 'lib/stack_master/sso_group_id_finder.rb'
+    - 'spec/stack_master/aws_driver/s3_spec.rb'
+    - 'spec/stack_master/change_set_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/identity_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/role_assumer_spec.rb'
+    - 'spec/stack_master/sso_group_id_finder_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowMultipleStyles, EnforcedHashRocketStyle, EnforcedColonStyle, EnforcedLastArgumentHashStyle.
+# SupportedHashRocketStyles: key, separator, table
+# SupportedColonStyles: key, separator, table
+# SupportedLastArgumentHashStyles: always_inspect, always_ignore, ignore_implicit, ignore_explicit
+Layout/HashAlignment:
+  Exclude:
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/config.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+    - 'spec/stack_master/stack_events/presenter_spec.rb'
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/HeredocIndentation:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'spec/integration/drift_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: normal, indented_internal_methods
+Layout/IndentationConsistency:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/template_utils_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: Width, AllowedPatterns.
+Layout/IndentationWidth:
+  Exclude:
+    - 'lib/stack_master/prompter.rb'
+    - 'lib/stack_master/sso_group_id_finder.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'lib/stack_master/validator.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: Max, AllowHeredoc, AllowURI, AllowQualifiedName, URISchemes, IgnoreCopDirectives, AllowedPatterns, SplitStrings.
+# URISchemes: http, https
+Layout/LineLength:
+  Exclude:
+    - 'features/step_definitions/parameter_store_steps.rb'
+    - 'features/step_definitions/stack_steps.rb'
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/commands/init.rb'
+    - 'lib/stack_master/commands/resources.rb'
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/identity.rb'
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/parameter_resolver.rb'
+    - 'lib/stack_master/parameter_resolvers/acm_certificate.rb'
+    - 'lib/stack_master/parameter_resolvers/ejson.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/parameter_resolvers/stack_output.rb'
+    - 'lib/stack_master/security_group_finder.rb'
+    - 'lib/stack_master/sns_topic_finder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sso_group_id_finder.rb'
+    - 'lib/stack_master/stack.rb'
+    - 'lib/stack_master/stack_events/fetcher.rb'
+    - 'lib/stack_master/stack_events/presenter.rb'
+    - 'lib/stack_master/stack_events/streamer.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/template_utils.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'spec/stack_master/change_set_spec.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/commands/delete_spec.rb'
+    - 'spec/stack_master/commands/drift_spec.rb'
+    - 'spec/stack_master/commands/init_spec.rb'
+    - 'spec/stack_master/commands/resources_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/identity_spec.rb'
+    - 'spec/stack_master/paged_response_accumulator_spec.rb'
+    - 'spec/stack_master/parameter_loader_spec.rb'
+    - 'spec/stack_master/parameter_resolver_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/ejson_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/parameter_store_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_pattern_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/definitions_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/state_builder_spec.rb'
+    - 'spec/stack_master/stack_events/fetcher_spec.rb'
+    - 'spec/stack_master/stack_events/presenter_spec.rb'
+    - 'spec/stack_master/stack_events/streamer_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+    - 'spec/stack_master/template_compilers/cfndsl_spec.rb'
+    - 'spec/stack_master/template_compilers/sparkle_formation_spec.rb'
+    - 'spec/stack_master/test_driver/cloud_formation_spec.rb'
+    - 'spec/stack_master/validator_spec.rb'
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: symmetrical, new_line, same_line
+Layout/MultilineArrayBraceLayout:
+  Exclude:
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/MultilineBlockLayout:
+  Exclude:
+    - 'spec/stack_master/change_set_spec.rb'
+    - 'spec/stack_master/commands/drift_spec.rb'
+    - 'spec/stack_master/paged_response_accumulator_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'spec/stack_master/stack_differ_spec.rb'
+    - 'spec/stack_master/stack_events/fetcher_spec.rb'
+    - 'spec/stack_master/stack_events/streamer_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+    - 'spec/stack_master/template_compilers/json_spec.rb'
+    - 'spec/stack_master/template_compilers/yaml_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: symmetrical, new_line, same_line
+Layout/MultilineHashBraceLayout:
+  Exclude:
+    - 'spec/stack_master/aws_driver/s3_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: symmetrical, new_line, same_line
+Layout/MultilineMethodCallBraceLayout:
+  Exclude:
+    - 'lib/stack_master/config.rb'
+    - 'spec/stack_master/commands/compile_spec.rb'
+    - 'spec/stack_master/commands/lint_spec.rb'
+    - 'spec/stack_master/commands/nag_spec.rb'
+    - 'spec/stack_master/stack_definition_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: aligned, indented, indented_relative_to_receiver
+Layout/MultilineMethodCallIndentation:
+  Exclude:
+    - 'spec/stack_master/parameter_resolvers/env_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/parameter_store_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/SpaceAfterColon:
+  Exclude:
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_pattern_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/SpaceAfterComma:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp-repeated.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/stack_events/presenter_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, no_space
+Layout/SpaceAroundEqualsInParameterDefault:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/template_utils.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/SpaceAroundKeyword:
+  Exclude:
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowForAlignment, EnforcedStyleForExponentOperator, EnforcedStyleForRationalLiterals.
+# SupportedStylesForExponentOperator: space, no_space
+# SupportedStylesForRationalLiterals: space, no_space
+Layout/SpaceAroundOperators:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceBeforeBlockBraces:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/definitions_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Layout/SpaceBeforeComma:
+  Exclude:
+    - 'spec/stack_master/commands/apply_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: require_no_space, require_space
+Layout/SpaceInLambdaLiteral:
+  Exclude:
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_pattern_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/empty_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/number_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/string_validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBrackets.
+# SupportedStyles: space, no_space, compact
+# SupportedStylesForEmptyBrackets: space, no_space
+Layout/SpaceInsideArrayLiteralBrackets:
+  Exclude:
+    - 'lib/stack_master/stack_definition.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces, SpaceBeforeBlockParameters.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideBlockBraces:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/parameter_resolvers/ami_finder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_values_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/string_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator_factory.rb'
+    - 'spec/stack_master/cloudformation_template_eruby_spec.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/commands/init_spec.rb'
+    - 'spec/stack_master/commands/lint_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/definitions_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/state_builder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space, compact
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideHashLiteralBraces:
+  Exclude:
+    - 'lib/stack_master/commands/delete.rb'
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/parameter_resolvers/ami_finder.rb'
+    - 'spec/stack_master/aws_driver/s3_spec.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/commands/delete_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/paged_response_accumulator_spec.rb'
+    - 'spec/stack_master/parameter_loader_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/ami_finder_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_ami_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/sns_topic_name_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+    - 'spec/stack_master/parameter_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_pattern_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/definitions_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/empty_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/number_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/state_builder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/string_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+    - 'spec/stack_master/sso_group_id_finder_spec.rb'
+    - 'spec/stack_master/stack_definition_spec.rb'
+    - 'spec/stack_master/stack_differ_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+    - 'spec/stack_master/template_compilers/cfndsl_spec.rb'
+    - 'spec/stack_master/template_compilers/sparkle_formation_spec.rb'
+    - 'spec/stack_master/template_compilers/yaml_spec.rb'
+    - 'spec/stack_master/test_driver/cloud_formation_spec.rb'
+    - 'spec/stack_master/utils_spec.rb'
+    - 'spec/stack_master/validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, compact, no_space
+Layout/SpaceInsideParens:
+  Exclude:
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp-repeated.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/paged_response_accumulator_spec.rb'
+    - 'spec/stack_master/parameter_resolver_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: final_newline, final_blank_line
+Layout/TrailingEmptyLines:
+  Exclude:
+    - 'lib/stack_master/resolver_array.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator_factory.rb'
+    - 'lib/stack_master/sparkle_formation/template_file.rb'
+    - 'spec/stack_master/parameter_resolvers/sso_group_id_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_pattern_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/definitions_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_size_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowInHeredoc.
+Layout/TrailingWhitespace:
+  Exclude:
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'spec/stack_master/commands/lint_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/parameter_store_spec.rb'
+    - 'spec/stack_master/resolver_array_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: AllowSafeAssignment.
+Lint/AssignmentInCondition:
+  Exclude:
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+
+# Configuration parameters: AllowedMethods.
+# AllowedMethods: enums
+Lint/ConstantDefinitionInBlock:
+  Exclude:
+    - 'spec/stack_master/resolver_array_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+
+# Configuration parameters: DebuggerMethods, DebuggerRequires.
+Lint/Debugger:
+  Exclude:
+    - 'Rakefile'
+
+Lint/DuplicateMethods:
+  Exclude:
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+
+Lint/IneffectiveAccessModifier:
+  Exclude:
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: standard_error, runtime_error
+Lint/InheritException:
+  Exclude:
+    - 'lib/stack_master/ctrl_c.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Lint/LiteralInInterpolation:
+  Exclude:
+    - 'spec/stack_master/sparkle_formation/compile_time/definitions_validator_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Lint/Loop:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/paged_response_accumulator.rb'
+
+# Configuration parameters: AllowedParentClasses.
+Lint/MissingSuper:
+  Exclude:
+    - 'lib/stack_master/parameter_resolvers/acm_certificate.rb'
+    - 'lib/stack_master/parameter_resolvers/ejson.rb'
+    - 'lib/stack_master/parameter_resolvers/env.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_ami.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_ami_by_tags.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/parameter_resolvers/parameter_store.rb'
+    - 'lib/stack_master/parameter_resolvers/security_group.rb'
+    - 'lib/stack_master/parameter_resolvers/sns_topic_name.rb'
+    - 'lib/stack_master/parameter_resolvers/sso_group_id.rb'
+    - 'lib/stack_master/parameter_resolvers/stack_output.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_pattern_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_values_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/empty_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/number_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/string_validator.rb'
+    - 'lib/stack_master/sparkle_formation/template_file.rb'
+
+Lint/NonLocalExitFromIterator:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+
+# Configuration parameters: AllowRBSInlineAnnotation.
+Lint/SelfAssignment:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Lint/SendWithMixinArgument:
+  Exclude:
+    - 'lib/stack_master/sparkle_formation/template_file.rb'
+
+# Configuration parameters: AllowComments, AllowNil.
+Lint/SuppressedException:
+  Exclude:
+    - 'Rakefile'
+    - 'lib/stack_master/stack_events/streamer.rb'
+    - 'lib/stack_master/stack_status.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
+Lint/UnusedBlockArgument:
+  Exclude:
+    - 'features/step_definitions/parameter_store_steps.rb'
+    - 'lib/stack_master/stack_differ.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods, IgnoreNotImplementedMethods, NotImplementedExceptions.
+# NotImplementedExceptions: NotImplementedError
+Lint/UnusedMethodArgument:
+  Exclude:
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'lib/stack_master/test_driver/s3.rb'
+    - 'spec/stack_master/parameter_resolver_spec.rb'
+    - 'spec/support/aws_stubs.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: ContextCreatingMethods, MethodCreatingMethods.
+Lint/UselessAccessModifier:
+  Exclude:
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Lint/UselessAssignment:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_ami_by_tags.rb'
+    - 'lib/stack_master/template_compiler.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: CheckForMethodsWithNoSideEffects.
+Lint/Void:
+  Exclude:
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp-repeated.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample.rb'
+
+# Configuration parameters: AllowedMethods, AllowedPatterns, CountRepeatedAttributes, Max.
+Metrics/AbcSize:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/command.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/commands/status.rb'
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/prompter.rb'
+    - 'lib/stack_master/sso_group_id_finder.rb'
+    - 'lib/stack_master/stack.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/validator.rb'
+    - 'spec/support/validator_spec.rb'
+
+# Configuration parameters: CountComments, Max, CountAsOne, AllowedMethods, AllowedPatterns.
+# AllowedMethods: refine
+Metrics/BlockLength:
+  Exclude:
+    - '**/*.gemspec'
+    - 'example/simple/templates/myapp_vpc.rb'
+    - 'spec/integration/drift_spec.rb'
+    - 'spec/stack_master/aws_driver/s3_spec.rb'
+    - 'spec/stack_master/change_set_spec.rb'
+    - 'spec/stack_master/cloudformation_interpolating_eruby_spec.rb'
+    - 'spec/stack_master/cloudformation_template_eruby_spec.rb'
+    - 'spec/stack_master/command_spec.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/commands/compile_spec.rb'
+    - 'spec/stack_master/commands/delete_spec.rb'
+    - 'spec/stack_master/commands/drift_spec.rb'
+    - 'spec/stack_master/commands/lint_spec.rb'
+    - 'spec/stack_master/commands/nag_spec.rb'
+    - 'spec/stack_master/commands/outputs_spec.rb'
+    - 'spec/stack_master/commands/resources_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/identity_spec.rb'
+    - 'spec/stack_master/paged_response_accumulator_spec.rb'
+    - 'spec/stack_master/parameter_loader_spec.rb'
+    - 'spec/stack_master/parameter_resolver_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/acm_certificate_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/ami_finder_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/ejson_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/env_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_ami_by_tags_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_ami_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/parameter_store_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/sns_topic_name_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/sso_group_id_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+    - 'spec/stack_master/parameter_validator_spec.rb'
+    - 'spec/stack_master/role_assumer_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_pattern_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/allowed_values_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/empty_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/max_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/min_length_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/number_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/parameters_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/string_validator_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_validator_factory_spec.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+    - 'spec/stack_master/sso_group_id_finder_spec.rb'
+    - 'spec/stack_master/stack_definition_spec.rb'
+    - 'spec/stack_master/stack_differ_spec.rb'
+    - 'spec/stack_master/stack_events/fetcher_spec.rb'
+    - 'spec/stack_master/stack_events/streamer_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+    - 'spec/stack_master/template_compilers/cfndsl_spec.rb'
+    - 'spec/stack_master/template_compilers/sparkle_formation_spec.rb'
+    - 'spec/stack_master/template_compilers/yaml_erb_spec.rb'
+    - 'spec/stack_master/template_utils_spec.rb'
+    - 'spec/stack_master/test_driver/cloud_formation_spec.rb'
+    - 'spec/stack_master/validator_spec.rb'
+    - 'spec/stack_master_spec.rb'
+
+# Configuration parameters: CountComments, Max, CountAsOne.
+Metrics/ClassLength:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/stack.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+
+# Configuration parameters: AllowedMethods, AllowedPatterns, Max.
+Metrics/CyclomaticComplexity:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/stack_events/streamer.rb'
+
+# Configuration parameters: CountComments, Max, CountAsOne, AllowedMethods, AllowedPatterns.
+Metrics/MethodLength:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/commands/init.rb'
+    - 'lib/stack_master/commands/lint.rb'
+    - 'lib/stack_master/commands/status.rb'
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/paged_response_accumulator.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/parameter_resolvers/stack_output.rb'
+    - 'lib/stack_master/parameter_validator.rb'
+    - 'lib/stack_master/prompter.rb'
+    - 'lib/stack_master/security_group_finder.rb'
+    - 'lib/stack_master/sso_group_id_finder.rb'
+    - 'lib/stack_master/stack.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/stack_events/streamer.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'lib/stack_master/validator.rb'
+    - 'spec/support/aws_stubs.rb'
+
+# Configuration parameters: CountComments, Max, CountAsOne.
+Metrics/ModuleLength:
+  Exclude:
+    - 'lib/stack_master.rb'
+
+# Configuration parameters: Max, CountKeywordArgs, MaxOptionalParameters.
+Metrics/ParameterLists:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/stack_events/streamer.rb'
+    - 'lib/stack_master/template_compiler.rb'
+
+# Configuration parameters: AllowedMethods, AllowedPatterns, Max.
+Metrics/PerceivedComplexity:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/stack_definition.rb'
+
+Naming/AccessorMethodName:
+  Exclude:
+    - 'lib/stack_master/aws_driver/cloud_formation.rb'
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'lib/stack_master/test_driver/s3.rb'
+
+# Configuration parameters: ExpectMatchingDefinition, CheckDefinitionPathHierarchy, CheckDefinitionPathHierarchyRoots, Regex, IgnoreExecutableScripts, AllowedAcronyms.
+# CheckDefinitionPathHierarchyRoots: lib, spec, test, src
+# AllowedAcronyms: CLI, DSL, ACL, API, ASCII, CPU, CSS, DNS, EOF, GUID, HTML, HTTP, HTTPS, ID, IP, JSON, LHS, QPS, RAM, RHS, RPC, SLA, SMTP, SQL, SSH, TCP, TLS, TTL, UDP, UI, UID, UUID, URI, URL, UTF8, VM, XML, XMPP, XSRF, XSS
+Naming/FileName:
+  Exclude:
+    - 'Rakefile.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp-repeated.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp.rb'
+
+# Configuration parameters: ForbiddenDelimiters.
+# ForbiddenDelimiters: (?i-mx:(^|\s)(EO[A-Z]{1}|END)(\s|$))
+Naming/HeredocDelimiterNaming:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyleForLeadingUnderscores.
+# SupportedStylesForLeadingUnderscores: disallowed, required, optional
+Naming/MemoizedInstanceVariableName:
+  Exclude:
+    - 'lib/stack_master/stack_differ.rb'
+
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: as, at, by, cc, db, id, if, in, io, ip, of, on, os, pp, to
+Naming/MethodParameterName:
+  Exclude:
+    - 'lib/stack_master/command.rb'
+    - 'lib/stack_master/paged_response_accumulator.rb'
+
+# Configuration parameters: NamePrefix, ForbiddenPrefixes, AllowedMethods, MethodDefinitionMacros, UseSorbetSigs.
+# NamePrefix: is_, has_, have_, does_
+# ForbiddenPrefixes: is_, has_, have_, does_
+# AllowedMethods: is_a?
+# MethodDefinitionMacros: define_method, define_singleton_method
+Naming/PredicatePrefix:
+  Exclude:
+    - 'spec/**/*'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/empty_validator.rb'
+    - 'lib/stack_master/sparkle_formation/template_file.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: PreferredName.
+Naming/RescuedExceptionsVariableName:
+  Exclude:
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+
+# Configuration parameters: EnforcedStyle, CheckMethodNames, CheckSymbols, AllowedIdentifiers, AllowedPatterns.
+# SupportedStyles: snake_case, normalcase, non_integer
+# AllowedIdentifiers: TLS1_1, TLS1_2, capture3, iso8601, rfc1123_date, rfc822, rfc2822, rfc3339, x86_64
+Naming/VariableNumber:
+  Exclude:
+    - 'example/simple/templates/myapp_vpc.rb'
+    - 'spec/fixtures/templates/rb/sparkle_formation/templates/template.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Security/YAMLLoad:
+  Exclude:
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/template_utils.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: prefer_alias, prefer_alias_method
+Style/Alias:
+  Exclude:
+    - 'lib/stack_master/sparkle_formation/template_file.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, conditionals
+Style/AndOr:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: percent_q, bare_percent
+Style/BarePercentLiterals:
+  Exclude:
+    - 'spec/stack_master/template_compilers/sparkle_formation_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, ProceduralMethods, FunctionalMethods, AllowedMethods, AllowedPatterns, AllowBracesOnProceduralOneLiners, BracesRequiredMethods.
+# SupportedStyles: line_count_based, semantic, braces_for_chaining, always_braces
+# ProceduralMethods: benchmark, bm, bmbm, create, each_with_object, measure, new, realtime, tap, with_object
+# FunctionalMethods: let, let!, subject, watch
+# AllowedMethods: lambda, proc, it
+Style/BlockDelimiters:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp-repeated.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample.rb'
+    - 'spec/stack_master/change_set_spec.rb'
+    - 'spec/stack_master/command_spec.rb'
+    - 'spec/stack_master/commands/compile_spec.rb'
+    - 'spec/stack_master/commands/drift_spec.rb'
+    - 'spec/stack_master/commands/lint_spec.rb'
+    - 'spec/stack_master/commands/nag_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/paged_response_accumulator_spec.rb'
+    - 'spec/stack_master/parameter_resolver_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/sns_topic_name_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/sso_group_id_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+    - 'spec/stack_master/sso_group_id_finder_spec.rb'
+    - 'spec/stack_master/stack_differ_spec.rb'
+    - 'spec/stack_master/stack_events/fetcher_spec.rb'
+    - 'spec/stack_master/stack_events/streamer_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+    - 'spec/stack_master/template_compilers/cfndsl_spec.rb'
+    - 'spec/stack_master/template_compilers/json_spec.rb'
+    - 'spec/stack_master/template_compilers/sparkle_formation_spec.rb'
+    - 'spec/stack_master/template_compilers/yaml_spec.rb'
+    - 'spec/stack_master/test_driver/cloud_formation_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowOnConstant, AllowOnSelfClass.
+Style/CaseEquality:
+  Exclude:
+    - 'lib/stack_master/parameter_resolver.rb'
+    - 'lib/stack_master/stack_definition.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle, EnforcedStyleForClasses, EnforcedStyleForModules.
+# SupportedStyles: nested, compact
+# SupportedStylesForClasses: ~, nested, compact
+# SupportedStylesForModules: ~, nested, compact
+Style/ClassAndModuleChildren:
+  Exclude:
+    - 'lib/stack_master/template_compilers/cfndsl.rb'
+    - 'lib/stack_master/template_compilers/json.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/template_compilers/yaml.rb'
+    - 'lib/stack_master/template_compilers/yaml_erb.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, AllowInnerBackticks.
+# SupportedStyles: backticks, percent_x, mixed
+Style/CommandLiteral:
+  Exclude:
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, SingleLineConditionsOnly, IncludeTernaryExpressions.
+# SupportedStyles: assign_to_condition, assign_inside_condition
+Style/ConditionalAssignment:
+  Exclude:
+    - 'lib/stack_master/command.rb'
+    - 'lib/stack_master/parameter_validator.rb'
+
+# Configuration parameters: AllowedConstants.
+Style/Documentation:
+  Exclude:
+    - 'spec/**/*'
+    - 'test/**/*'
+    - 'lib/stack_master.rb'
+    - 'lib/stack_master/aws_driver/cloud_formation.rb'
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/command.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/compile.rb'
+    - 'lib/stack_master/commands/delete.rb'
+    - 'lib/stack_master/commands/diff.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/commands/events.rb'
+    - 'lib/stack_master/commands/init.rb'
+    - 'lib/stack_master/commands/lint.rb'
+    - 'lib/stack_master/commands/list_stacks.rb'
+    - 'lib/stack_master/commands/nag.rb'
+    - 'lib/stack_master/commands/outputs.rb'
+    - 'lib/stack_master/commands/resources.rb'
+    - 'lib/stack_master/commands/status.rb'
+    - 'lib/stack_master/commands/terminal_helper.rb'
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/commands/validate.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/diff.rb'
+    - 'lib/stack_master/identity.rb'
+    - 'lib/stack_master/paged_response_accumulator.rb'
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/parameter_resolver.rb'
+    - 'lib/stack_master/parameter_resolvers/acm_certificate.rb'
+    - 'lib/stack_master/parameter_resolvers/ami_finder.rb'
+    - 'lib/stack_master/parameter_resolvers/ejson.rb'
+    - 'lib/stack_master/parameter_resolvers/env.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_ami.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_ami_by_tags.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/parameter_resolvers/parameter_store.rb'
+    - 'lib/stack_master/parameter_resolvers/security_group.rb'
+    - 'lib/stack_master/parameter_resolvers/sns_topic_name.rb'
+    - 'lib/stack_master/parameter_resolvers/sso_group_id.rb'
+    - 'lib/stack_master/parameter_resolvers/stack_output.rb'
+    - 'lib/stack_master/parameter_validator.rb'
+    - 'lib/stack_master/prompter.rb'
+    - 'lib/stack_master/resolver_array.rb'
+    - 'lib/stack_master/role_assumer.rb'
+    - 'lib/stack_master/security_group_finder.rb'
+    - 'lib/stack_master/sns_topic_finder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_pattern_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_values_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/empty_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/max_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_length_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/min_size_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/number_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/parameters_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/state_builder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/string_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_builder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator_factory.rb'
+    - 'lib/stack_master/sparkle_formation/template_file.rb'
+    - 'lib/stack_master/sso_group_id_finder.rb'
+    - 'lib/stack_master/stack.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/stack_differ.rb'
+    - 'lib/stack_master/stack_events/fetcher.rb'
+    - 'lib/stack_master/stack_events/presenter.rb'
+    - 'lib/stack_master/stack_events/streamer.rb'
+    - 'lib/stack_master/stack_states.rb'
+    - 'lib/stack_master/stack_status.rb'
+    - 'lib/stack_master/template_compiler.rb'
+    - 'lib/stack_master/template_compilers/cfndsl.rb'
+    - 'lib/stack_master/template_compilers/json.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/template_compilers/yaml.rb'
+    - 'lib/stack_master/template_compilers/yaml_erb.rb'
+    - 'lib/stack_master/template_utils.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+    - 'lib/stack_master/test_driver/s3.rb'
+    - 'lib/stack_master/utils.rb'
+    - 'lib/stack_master/validator.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/EachWithObject:
+  Exclude:
+    - 'features/step_definitions/stack_steps.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/parameter_resolver.rb'
+    - 'lib/stack_master/stack.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/utils.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/EmptyLiteral:
+  Exclude:
+    - 'lib/stack_master/test_driver/s3.rb'
+    - 'spec/stack_master/stack_differ_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: compact, expanded
+Style/EmptyMethod:
+  Exclude:
+    - 'lib/stack_master/test_driver/s3.rb'
+    - 'spec/stack_master/parameter_resolver_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/Encoding:
+  Exclude:
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/ExpandPathArguments:
+  Exclude:
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/ExplicitBlockArgument:
+  Exclude:
+    - 'lib/stack_master/parameter_resolver.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, always_true, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Style/GlobalStdStream:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: MinBodyLength, AllowConsecutiveConditionals.
+Style/GuardClause:
+  Exclude:
+    - 'lib/stack_master/aws_driver/cloud_formation.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/events.rb'
+    - 'lib/stack_master/commands/init.rb'
+    - 'lib/stack_master/parameter_resolver.rb'
+    - 'lib/stack_master/parameter_resolvers/ejson.rb'
+    - 'lib/stack_master/parameter_resolvers/stack_output.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_builder.rb'
+    - 'lib/stack_master/test_driver/cloud_formation.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, EnforcedShorthandSyntax, UseHashRocketsWithSymbolValues, PreferHashRocketsForNonAlnumEndingSymbols.
+# SupportedStyles: ruby19, hash_rockets, no_mixed_keys, ruby19_no_mixed_keys
+# SupportedShorthandSyntax: always, never, either, consistent, either_consistent
+Style/HashSyntax:
+  Exclude:
+    - 'Rakefile'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'spec/stack_master/aws_driver/s3_spec.rb'
+    - 'spec/stack_master/commands/delete_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/IfUnlessModifier:
+  Exclude:
+    - 'bin/stack_master'
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/commands/events.rb'
+    - 'lib/stack_master/parameter_resolvers/acm_certificate.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/security_group_finder.rb'
+    - 'lib/stack_master/sns_topic_finder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_builder.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator.rb'
+    - 'lib/stack_master/stack_differ.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'lib/stack_master/template_utils.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: InverseMethods, InverseBlocks.
+Style/InverseMethods:
+  Exclude:
+    - 'lib/stack_master/commands/tidy.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/KeywordParametersOrder:
+  Exclude:
+    - 'lib/stack_master/diff.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowedMethods, AllowedPatterns.
+Style/MethodCallWithoutArgsParentheses:
+  Exclude:
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/parameter_resolvers/sso_group_id.rb'
+    - 'spec/stack_master/commands/init_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: require_parentheses, require_no_parentheses, require_no_parentheses_except_multiline
+Style/MethodDefParentheses:
+  Exclude:
+    - 'lib/stack_master/config.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle, Autocorrect.
+# SupportedStyles: module_function, extend_self, forbidden
+Style/ModuleFunction:
+  Exclude:
+    - 'lib/stack_master.rb'
+    - 'lib/stack_master/stack_states.rb'
+    - 'lib/stack_master/template_utils.rb'
+    - 'lib/stack_master/utils.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/MultilineIfModifier:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: literals, strict
+Style/MutableConstant:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/parameter_loader.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/value_validator_factory.rb'
+    - 'lib/stack_master/version.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: both, prefix, postfix
+Style/NegatedIf:
+  Exclude:
+    - 'lib/stack_master/commands/init.rb'
+    - 'lib/stack_master/commands/tidy.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, MinBodyLength, AllowConsecutiveConditionals.
+# SupportedStyles: skip_modifier_ifs, always
+Style/Next:
+  Exclude:
+    - 'lib/stack_master/commands/tidy.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: MinDigits, Strict, AllowedNumbers, AllowedPatterns.
+Style/NumericLiterals:
+  Exclude:
+    - 'lib/stack_master/template_compilers/json.rb'
+    - 'lib/stack_master/template_utils.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_ami_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/template_compilers/json_spec.rb'
+    - 'spec/stack_master/template_utils_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle, AllowedMethods, AllowedPatterns.
+# SupportedStyles: predicate, comparison
+Style/NumericPredicate:
+  Exclude:
+    - 'spec/**/*'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/commands/events.rb'
+    - 'lib/stack_master/commands/nag.rb'
+
+# Configuration parameters: AllowedMethods.
+# AllowedMethods: respond_to_missing?
+Style/OptionalBooleanParameter:
+  Exclude:
+    - 'lib/stack_master/commands/status.rb'
+    - 'lib/stack_master/stack.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/ParallelAssignment:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: PreferredDelimiters.
+Style/PercentLiteralDelimiters:
+  Exclude:
+    - 'spec/stack_master/identity_spec.rb'
+    - 'stack_master.gemspec'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle, AllowedCompactTypes.
+# SupportedStyles: compact, exploded
+Style/RaiseArgs:
+  Exclude:
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_resolver.rb'
+    - 'lib/stack_master/parameter_resolvers/sns_topic_name.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/definitions_validator.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/parameters_validator.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantAssignment:
+  Exclude:
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/parameter_resolvers/ami_finder.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantException:
+  Exclude:
+    - 'spec/stack_master/command_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Style/RedundantInterpolation:
+  Exclude:
+    - 'lib/stack_master/commands/init.rb'
+    - 'lib/stack_master/resolver_array.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'spec/stack_master/stack_definition_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantPercentQ:
+  Exclude:
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantRegexpCharacterClass:
+  Exclude:
+    - 'spec/stack_master/command_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantRegexpEscape:
+  Exclude:
+    - 'spec/stack_master/stack_differ_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowMultipleReturnValues.
+Style/RedundantReturn:
+  Exclude:
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/RedundantSelf:
+  Exclude:
+    - 'lib/stack_master/commands/list_stacks.rb'
+    - 'lib/stack_master/commands/outputs.rb'
+    - 'lib/stack_master/commands/status.rb'
+    - 'lib/stack_master/resolver_array.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, AllowInnerSlashes.
+# SupportedStyles: slashes, percent_r, mixed
+Style/RegexpLiteral:
+  Exclude:
+    - 'lib/stack_master/commands/terminal_helper.rb'
+    - 'lib/stack_master/sparkle_formation/compile_time/allowed_pattern_validator.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: implicit, explicit
+Style/RescueStandardError:
+  Exclude:
+    - 'spec/stack_master/command_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: ConvertCodeThatCanStartToReturnNil, AllowedMethods, MaxChainLength.
+# AllowedMethods: present?, blank?, presence, try, try!
+Style/SafeNavigation:
+  Exclude:
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/stack_events/streamer.rb'
+    - 'lib/stack_master/stack_status.rb'
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: only_raise, only_fail, semantic
+Style/SignalException:
+  Exclude:
+    - 'lib/stack_master/resolver_array.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: RequireEnglish, EnforcedStyle.
+# SupportedStyles: use_perl_names, use_english_names, use_builtin_english_names
+Style/SpecialGlobalVars:
+  Exclude:
+    - 'lib/stack_master/commands/nag.rb'
+    - 'lib/stack_master/parameter_resolver.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: Mode.
+Style/StringConcatenation:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/stack_differ.rb'
+    - 'spec/stack_master/commands/compile_spec.rb'
+    - 'spec/stack_master/template_utils_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiterals:
+  Exclude:
+    - 'Rakefile'
+    - 'bin/stack_master'
+    - 'example/simple/templates/myapp_vpc.rb'
+    - 'example/simple/templates/myapp_web.rb'
+    - 'features/step_definitions/parameter_store_steps.rb'
+    - 'features/support/env.rb'
+    - 'lib/stack_master.rb'
+    - 'lib/stack_master/aws_driver/s3.rb'
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/cli.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/delete.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'lib/stack_master/commands/init.rb'
+    - 'lib/stack_master/commands/lint.rb'
+    - 'lib/stack_master/commands/status.rb'
+    - 'lib/stack_master/commands/terminal_helper.rb'
+    - 'lib/stack_master/commands/tidy.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/diff.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_ami_by_tags.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/parameter_resolvers/one_password.rb'
+    - 'lib/stack_master/prompter.rb'
+    - 'lib/stack_master/role_assumer.rb'
+    - 'lib/stack_master/security_group_finder.rb'
+    - 'lib/stack_master/sns_topic_finder.rb'
+    - 'lib/stack_master/stack_definition.rb'
+    - 'lib/stack_master/stack_differ.rb'
+    - 'lib/stack_master/validator.rb'
+    - 'lib/stack_master/version.rb'
+    - 'spec/fixtures/sparkle_pack_integration/my_sparkle_pack/lib/sparkleformation/dynamics/my_dynamic.rb'
+    - 'spec/fixtures/sparkle_pack_integration/my_sparkle_pack/lib/sparkleformation/templates/dynamics/local_dynamic.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp-repeated.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample-ctp.rb'
+    - 'spec/fixtures/templates/rb/cfndsl/sample.rb'
+    - 'spec/fixtures/templates/rb/sparkle_formation/templates/template.rb'
+    - 'spec/integration/drift_spec.rb'
+    - 'spec/spec_helper.rb'
+    - 'spec/stack_master/aws_driver/s3_spec.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/commands/compile_spec.rb'
+    - 'spec/stack_master/commands/delete_spec.rb'
+    - 'spec/stack_master/commands/drift_spec.rb'
+    - 'spec/stack_master/commands/init_spec.rb'
+    - 'spec/stack_master/commands/lint_spec.rb'
+    - 'spec/stack_master/commands/nag_spec.rb'
+    - 'spec/stack_master/commands/status_spec.rb'
+    - 'spec/stack_master/commands/validate_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/parameter_loader_spec.rb'
+    - 'spec/stack_master/parameter_resolver_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/ami_finder_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/ejson_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/one_password_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/parameter_store_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/security_group_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/security_groups_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/stack_output_spec.rb'
+    - 'spec/stack_master/parameter_validator_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'spec/stack_master/sparkle_formation/template_file_spec.rb'
+    - 'spec/stack_master/sso_group_id_finder_spec.rb'
+    - 'spec/stack_master/stack_definition_spec.rb'
+    - 'spec/stack_master/stack_differ_spec.rb'
+    - 'spec/stack_master/stack_events/presenter_spec.rb'
+    - 'spec/stack_master/stack_events/streamer_spec.rb'
+    - 'spec/stack_master/stack_spec.rb'
+    - 'spec/stack_master/template_compiler_spec.rb'
+    - 'spec/stack_master/template_compilers/cfndsl_spec.rb'
+    - 'spec/stack_master/template_compilers/json_spec.rb'
+    - 'spec/stack_master/template_compilers/sparkle_formation_spec.rb'
+    - 'spec/stack_master/template_utils_spec.rb'
+    - 'spec/stack_master/test_driver/cloud_formation_spec.rb'
+    - 'spec/stack_master/utils_spec.rb'
+    - 'spec/stack_master/validator_spec.rb'
+    - 'spec/stack_master_spec.rb'
+    - 'spec/support/aws_stubs.rb'
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: MinSize.
+# SupportedStyles: percent, brackets
+Style/SymbolArray:
+  EnforcedStyle: brackets
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: AllowMethodsWithArguments, AllowedMethods, AllowedPatterns, AllowComments.
+# AllowedMethods: define_method
+Style/SymbolProc:
+  Exclude:
+    - 'lib/stack_master/command.rb'
+    - 'spec/support/validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyleForMultiline.
+# SupportedStylesForMultiline: comma, consistent_comma, diff_comma, no_comma
+Style/TrailingCommaInArguments:
+  Exclude:
+    - 'lib/stack_master/template_compilers/sparkle_formation.rb'
+    - 'spec/stack_master/validator_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyleForMultiline.
+# SupportedStylesForMultiline: comma, consistent_comma, diff_comma, no_comma
+Style/TrailingCommaInArrayLiteral:
+  Exclude:
+    - 'lib/stack_master/security_group_finder.rb'
+    - 'spec/integration/drift_spec.rb'
+    - 'spec/stack_master/cloudformation_interpolating_eruby_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'spec/stack_master/sns_topic_finder_spec.rb'
+    - 'spec/stack_master/stack_definition_spec.rb'
+    - 'spec/stack_master/stack_events/fetcher_spec.rb'
+    - 'spec/stack_master/stack_events/streamer_spec.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyleForMultiline.
+# SupportedStylesForMultiline: comma, consistent_comma, diff_comma, no_comma
+Style/TrailingCommaInHashLiteral:
+  Exclude:
+    - 'lib/stack_master/commands/status.rb'
+    - 'lib/stack_master/config.rb'
+    - 'lib/stack_master/parameter_resolvers/latest_container.rb'
+    - 'lib/stack_master/security_group_finder.rb'
+    - 'lib/stack_master/sso_group_id_finder.rb'
+    - 'spec/integration/drift_spec.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/security_group_finder_spec.rb'
+    - 'stack_master.gemspec'
+
+# This cop supports safe autocorrection (--autocorrect).
+Style/UnlessElse:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
+
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, MinSize, WordRegex.
+# SupportedStyles: percent, brackets
+Style/WordArray:
+  Exclude:
+    - 'lib/stack_master/change_set.rb'
+    - 'lib/stack_master/commands/apply.rb'
+    - 'lib/stack_master/commands/drift.rb'
+    - 'spec/stack_master/commands/apply_spec.rb'
+    - 'spec/stack_master/config_spec.rb'
+    - 'spec/stack_master/parameter_resolvers/latest_container_spec.rb'
+    - 'spec/stack_master/sparkle_formation/compile_time/value_build_spec.rb'
+    - 'spec/stack_master/test_driver/cloud_formation_spec.rb'
+
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Style/ZeroLengthPredicate:
+  Exclude:
+    - 'lib/stack_master/cli.rb'
diff --git a/Rakefile b/Rakefile
index a4743611..4fd0553e 100644
--- a/Rakefile
+++ b/Rakefile
@@ -21,7 +21,10 @@ begin
   RSpec::Core::RakeTask.new(:spec) do |t|
     t.rspec_opts = "--format doc"
   end
+
+  require 'rubocop/rake_task'
+  RuboCop::RakeTask.new('rubocop')
 rescue LoadError
 end
 
-task :default => [:features, :spec]
+task :default => [:features, :spec, :rubocop]
diff --git a/stack_master.gemspec b/stack_master.gemspec
index 00f60a28..4e9f5265 100644
--- a/stack_master.gemspec
+++ b/stack_master.gemspec
@@ -34,6 +34,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "aruba"
   spec.add_development_dependency "timecop"
   spec.add_development_dependency "ostruct"
+  spec.add_development_dependency "rubocop"
   spec.add_dependency "os"
   spec.add_dependency "ruby-progressbar"
   spec.add_dependency "commander", ">= 4.6.0", "< 6"