diff --git a/style/ruby/.rubocop.yml b/style/ruby/.rubocop.yml
deleted file mode 100644
index 46d79e77..00000000
--- a/style/ruby/.rubocop.yml
+++ /dev/null
@@ -1,654 +0,0 @@
-AllCops:
-  Exclude:
-    - db/schema.rb
-
-require:
-  - rubocop-rails
-  - rubocop-performance
-
-Naming/AccessorMethodName:
-  Description: Check the naming of accessor methods for get_/set_.
-  Enabled: false
-
-Style/Alias:
-  Description: 'Use alias_method instead of alias.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#alias-method'
-  Enabled: false
-
-Style/ArrayJoin:
-  Description: 'Use Array#join instead of Array#*.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#array-join'
-  Enabled: false
-
-Style/AsciiComments:
-  Description: 'Use only ascii symbols in comments.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#english-comments'
-  Enabled: false
-
-Naming/AsciiIdentifiers:
-  Description: 'Use only ascii symbols in identifiers.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#english-identifiers'
-  Enabled: false
-
-Style/Attr:
-  Description: 'Checks for uses of Module#attr.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#attr'
-  Enabled: false
-
-Metrics/BlockNesting:
-  Description: 'Avoid excessive block nesting'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#three-is-the-number-thou-shalt-count'
-  Enabled: false
-
-Style/CaseEquality:
-  Description: 'Avoid explicit use of the case equality operator(===).'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-case-equality'
-  Enabled: false
-
-Style/CharacterLiteral:
-  Description: 'Checks for uses of character literals.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-character-literals'
-  Enabled: false
-
-Style/ClassAndModuleChildren:
-  Description: 'Checks style of children classes and modules.'
-  Enabled: true
-  EnforcedStyle: nested
-
-Metrics/ClassLength:
-  Description: 'Avoid classes longer than 100 lines of code.'
-  Enabled: false
-
-Metrics/ModuleLength:
-  Description: 'Avoid modules longer than 100 lines of code.'
-  Enabled: false
-
-Style/ClassVars:
-  Description: 'Avoid the use of class variables.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-class-vars'
-  Enabled: false
-
-Style/CollectionMethods:
-  Enabled: true
-  PreferredMethods:
-    find: detect
-    inject: reduce
-    collect: map
-    find_all: select
-
-Style/ColonMethodCall:
-  Description: 'Do not use :: for method call.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#double-colons'
-  Enabled: false
-
-Style/CommentAnnotation:
-  Description: >-
-                 Checks formatting of special comments
-                 (TODO, FIXME, OPTIMIZE, HACK, REVIEW).
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#annotate-keywords'
-  Enabled: false
-
-Metrics/AbcSize:
-  Description: >-
-                 A calculated magnitude based on number of assignments,
-                 branches, and conditions.
-  Enabled: false
-
-Metrics/BlockLength:
-  CountComments: true  # count full line comments?
-  Max: 25
-  ExcludedMethods: []
-  Exclude:
-    - "spec/**/*"
-
-Metrics/CyclomaticComplexity:
-  Description: >-
-                 A complexity metric that is strongly correlated to the number
-                 of test cases needed to validate a method.
-  Enabled: false
-
-Rails/Delegate:
-  Description: 'Prefer delegate method for delegations.'
-  Enabled: false
-
-Style/PreferredHashMethods:
-  Description: 'Checks use of `has_key?` and `has_value?` Hash methods.'
-  StyleGuide: '#hash-key'
-  Enabled: false
-
-Style/Documentation:
-  Description: 'Document classes and non-namespace modules.'
-  Enabled: false
-
-Style/DoubleNegation:
-  Description: 'Checks for uses of double negation (!!).'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-bang-bang'
-  Enabled: false
-
-Style/EachWithObject:
-  Description: 'Prefer `each_with_object` over `inject` or `reduce`.'
-  Enabled: false
-
-Style/EmptyLiteral:
-  Description: 'Prefer literals to Array.new/Hash.new/String.new.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#literal-array-hash'
-  Enabled: false
-
-# Checks whether the source file has a utf-8 encoding comment or not
-# AutoCorrectEncodingComment must match the regex
-# /#.*coding\s?[:=]\s?(?:UTF|utf)-8/
-Style/Encoding:
-  Enabled: false
-
-Style/EvenOdd:
-  Description: 'Favor the use of Fixnum#even? && Fixnum#odd?'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#predicate-methods'
-  Enabled: false
-
-Naming/FileName:
-  Description: 'Use snake_case for source file names.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#snake-case-files'
-  Enabled: false
-
-Style/FrozenStringLiteralComment:
-  Description: >-
-    Add the frozen_string_literal comment to the top of files
-    to help transition from Ruby 2.3.0 to Ruby 3.0.
-  Enabled: false
-
-Lint/FlipFlop:
-  Description: 'Checks for flip flops'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-flip-flops'
-  Enabled: false
-
-Style/FormatString:
-  Description: 'Enforce the use of Kernel#sprintf, Kernel#format or String#%.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#sprintf'
-  Enabled: false
-
-Style/GlobalVars:
-  Description: 'Do not introduce global variables.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#instance-vars'
-  Reference: 'http://www.zenspider.com/Languages/Ruby/QuickRef.html'
-  Enabled: false
-
-Style/GuardClause:
-  Description: 'Check for conditionals that can be replaced with guard clauses'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-nested-conditionals'
-  Enabled: false
-
-Style/IfUnlessModifier:
-  Description: >-
-                 Favor modifier if/unless usage when you have a
-                 single-line body.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#if-as-a-modifier'
-  Enabled: false
-
-Style/IfWithSemicolon:
-  Description: 'Do not use if x; .... Use the ternary operator instead.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-semicolon-ifs'
-  Enabled: false
-
-Style/InlineComment:
-  Description: 'Avoid inline comments.'
-  Enabled: false
-
-Style/Lambda:
-  Description: 'Use the new lambda literal syntax for single-line blocks.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#lambda-multi-line'
-  Enabled: false
-
-Style/LambdaCall:
-  Description: 'Use lambda.call(...) instead of lambda.(...).'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#proc-call'
-  Enabled: false
-
-Style/LineEndConcatenation:
-  Description: >-
-                 Use \ instead of + or << to concatenate two string literals at
-                 line end.
-  Enabled: false
-
-Metrics/MethodLength:
-  Description: 'Avoid methods longer than 10 lines of code.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#short-methods'
-  Enabled: false
-
-Style/ModuleFunction:
-  Description: 'Checks for usage of `extend self` in modules.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#module-function'
-  Enabled: false
-
-Style/MultilineBlockChain:
-  Description: 'Avoid multi-line chains of blocks.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#single-line-blocks'
-  Enabled: false
-
-Style/NegatedIf:
-  Description: >-
-                 Favor unless over if for negative conditions
-                 (or control flow or).
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#unless-for-negatives'
-  Enabled: false
-
-Style/NegatedWhile:
-  Description: 'Favor until over while for negative conditions.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#until-for-negatives'
-  Enabled: false
-
-Style/Next:
-  Description: 'Use `next` to skip iteration instead of a condition at the end.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-nested-conditionals'
-  Enabled: false
-
-Style/NilComparison:
-  Description: 'Prefer x.nil? to x == nil.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#predicate-methods'
-  Enabled: false
-
-Style/Not:
-  Description: 'Use ! instead of not.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#bang-not-not'
-  Enabled: false
-
-Style/NumericLiterals:
-  Description: >-
-                 Add underscores to large numeric literals to improve their
-                 readability.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#underscores-in-numerics'
-  Enabled: false
-
-Style/OneLineConditional:
-  Description: >-
-                 Favor the ternary operator(?:) over
-                 if/then/else/end constructs.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#ternary-operator'
-  Enabled: false
-
-Naming/BinaryOperatorParameterName:
-  Description: 'When defining binary operators, name the argument other.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#other-arg'
-  Enabled: false
-
-Metrics/ParameterLists:
-  Description: 'Avoid parameter lists longer than three or four parameters.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#too-many-params'
-  Enabled: false
-
-Style/PercentLiteralDelimiters:
-  Description: 'Use `%`-literal delimiters consistently'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#percent-literal-braces'
-  Enabled: false
-
-Style/PerlBackrefs:
-  Description: 'Avoid Perl-style regex back references.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-perl-regexp-last-matchers'
-  Enabled: false
-
-Naming/PredicateName:
-  Description: 'Check the names of predicate methods.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#bool-methods-qmark'
-  ForbiddenPrefixes:
-    - is_
-  Exclude:
-    - spec/**/*
-
-Style/Proc:
-  Description: 'Use proc instead of Proc.new.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#proc'
-  Enabled: false
-
-Style/RaiseArgs:
-  Description: 'Checks the arguments passed to raise/fail.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#exception-class-messages'
-  Enabled: false
-
-Style/RegexpLiteral:
-  Description: 'Use / or %r around regular expressions.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#percent-r'
-  Enabled: false
-
-Style/Sample:
-  Description: >-
-    Use `sample` instead of `shuffle.first`,
-    `shuffle.last`, and `shuffle[Fixnum]`.
-  Reference: 'https://github.com/JuanitoFatas/fast-ruby#arrayshufflefirst-vs-arraysample-code'
-  Enabled: false
-
-Style/SelfAssignment:
-  Description: >-
-                 Checks for places where self-assignment shorthand should have
-                 been used.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#self-assignment'
-  Enabled: false
-
-Style/SingleLineBlockParams:
-  Description: 'Enforces the names of some block params.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#reduce-blocks'
-  Enabled: false
-
-Style/SingleLineMethods:
-  Description: 'Avoid single-line methods.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-single-line-methods'
-  Enabled: false
-
-Style/SignalException:
-  Description: 'Checks for proper usage of fail and raise.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#fail-method'
-  Enabled: false
-
-Style/SpecialGlobalVars:
-  Description: 'Avoid Perl-style global variables.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-cryptic-perlisms'
-  Enabled: false
-
-Style/StringLiterals:
-  Description: 'Checks if uses of quotes match the configured preference.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#consistent-string-literals'
-  EnforcedStyle: double_quotes
-  Enabled: true
-
-Style/TrailingCommaInArguments:
-  Description: 'Checks for trailing comma in argument lists.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-trailing-array-commas'
-  EnforcedStyleForMultiline: comma
-  SupportedStylesForMultiline:
-    - comma
-    - consistent_comma
-    - no_comma
-  Enabled: true
-
-Style/TrailingCommaInArrayLiteral:
-  Description: 'Checks for trailing comma in array literals.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-trailing-array-commas'
-  EnforcedStyleForMultiline: comma
-  SupportedStylesForMultiline:
-    - comma
-    - consistent_comma
-    - no_comma
-  Enabled: true
-
-Style/TrailingCommaInHashLiteral:
-  Description: 'Checks for trailing comma in hash literals.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-trailing-array-commas'
-  EnforcedStyleForMultiline: comma
-  SupportedStylesForMultiline:
-    - comma
-    - consistent_comma
-    - no_comma
-  Enabled: true
-
-Style/TrivialAccessors:
-  Description: 'Prefer attr_* methods to trivial readers/writers.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#attr_family'
-  Enabled: false
-
-Style/VariableInterpolation:
-  Description: >-
-                 Don't interpolate global, instance and class variables
-                 directly in strings.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#curlies-interpolate'
-  Enabled: false
-
-Style/WhenThen:
-  Description: 'Use when x then ... for one-line cases.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#one-line-cases'
-  Enabled: false
-
-Style/WhileUntilModifier:
-  Description: >-
-                 Favor modifier while/until usage when you have a
-                 single-line body.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#while-as-a-modifier'
-  Enabled: false
-
-Style/WordArray:
-  Description: 'Use %w or %W for arrays of words.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#percent-w'
-  Enabled: false
-
-# Layout
-
-Layout/ParameterAlignment:
-  Description: 'Here we check if the parameters on a multi-line method call or definition are aligned.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-double-indent'
-  Enabled: false
-
-Layout/ConditionPosition:
-  Description: >-
-                 Checks for condition placed in a confusing position relative to
-                 the keyword.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#same-line-condition'
-  Enabled: false
-
-Layout/DotPosition:
-  Description: 'Checks the position of the dot in multi-line method calls.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#consistent-multi-line-chains'
-  EnforcedStyle: trailing
-
-Layout/ExtraSpacing:
-  Description: 'Do not use unnecessary spacing.'
-  Enabled: true
-
-Layout/MultilineOperationIndentation:
-  Description: >-
-                 Checks indentation of binary operations that span more than
-                 one line.
-  Enabled: true
-  EnforcedStyle: indented
-
-Layout/MultilineMethodCallIndentation:
-  Description: >-
-                 Checks indentation of method calls with the dot operator
-                 that span more than one line.
-  Enabled: true
-  EnforcedStyle: indented
-
-Layout/InitialIndentation:
-  Description: >-
-    Checks the indentation of the first non-blank non-comment line in a file.
-  Enabled: false
-
-Layout/LineLength:
-  Description: 'Limit lines to 80 characters.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#80-character-limits'
-  Max: 80
-
-# Lint
-
-Lint/AmbiguousOperator:
-  Description: >-
-                 Checks for ambiguous operators in the first argument of a
-                 method invocation without parentheses.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#parens-as-args'
-  Enabled: false
-
-Lint/AmbiguousRegexpLiteral:
-  Description: >-
-                 Checks for ambiguous regexp literals in the first argument of
-                 a method invocation without parenthesis.
-  Enabled: false
-
-Lint/AssignmentInCondition:
-  Description: "Don't use assignment in conditions."
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#safe-assignment-in-condition'
-  Enabled: false
-
-Lint/CircularArgumentReference:
-  Description: "Don't refer to the keyword argument in the default value."
-  Enabled: false
-
-Lint/DeprecatedClassMethods:
-  Description: 'Check for deprecated class method calls.'
-  Enabled: false
-
-Lint/DuplicateHashKey:
-  Description: 'Check for duplicate keys in hash literals.'
-  Enabled: false
-
-Lint/EachWithObjectArgument:
-  Description: 'Check for immutable argument given to each_with_object.'
-  Enabled: false
-
-Lint/ElseLayout:
-  Description: 'Check for odd code arrangement in an else block.'
-  Enabled: false
-
-Lint/FormatParameterMismatch:
-  Description: 'The number of parameters to format/sprint must match the fields.'
-  Enabled: false
-
-Lint/SuppressedException:
-  Description: "Don't suppress exception."
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#dont-hide-exceptions'
-  Enabled: false
-
-Lint/LiteralAsCondition:
-  Description: 'Checks of literals used in conditions.'
-  Enabled: false
-
-Lint/LiteralInInterpolation:
-  Description: 'Checks for literals used in interpolation.'
-  Enabled: false
-
-Lint/Loop:
-  Description: >-
-                 Use Kernel#loop with break rather than begin/end/until or
-                 begin/end/while for post-loop tests.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#loop-with-break'
-  Enabled: false
-
-Lint/NestedMethodDefinition:
-  Description: 'Do not use nested method definitions.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-nested-methods'
-  Enabled: false
-
-Lint/NonLocalExitFromIterator:
-  Description: 'Do not use return in iterator to cause non-local exit.'
-  Enabled: false
-
-Lint/ParenthesesAsGroupedExpression:
-  Description: >-
-                 Checks for method calls with a space before the opening
-                 parenthesis.
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#parens-no-spaces'
-  Enabled: false
-
-Lint/RequireParentheses:
-  Description: >-
-                 Use parentheses in the method call to avoid confusion
-                 about precedence.
-  Enabled: false
-
-Lint/UnderscorePrefixedVariableName:
-  Description: 'Do not use prefix `_` for a variable that is used.'
-  Enabled: false
-
-Lint/RedundantCopDisableDirective:
-  Description: >-
-                 Checks for rubocop:disable comments that can be removed.
-                 Note: this cop is not disabled when disabling all cops.
-                 It must be explicitly disabled.
-  Enabled: false
-
-Lint/Void:
-  Description: 'Possible use of operator/literal/variable in void context.'
-  Enabled: false
-
-# Performance
-
-Performance/CaseWhenSplat:
-  Description: >-
-                  Place `when` conditions that use splat at the end
-                  of the list of `when` branches.
-  Enabled: false
-
-Performance/Count:
-  Description: >-
-                  Use `count` instead of `select...size`, `reject...size`,
-                  `select...count`, `reject...count`, `select...length`,
-                  and `reject...length`.
-  Enabled: false
-
-Performance/Detect:
-  Description: >-
-                  Use `detect` instead of `select.first`, `find_all.first`,
-                  `select.last`, and `find_all.last`.
-  Reference: 'https://github.com/JuanitoFatas/fast-ruby#enumerabledetect-vs-enumerableselectfirst-code'
-  Enabled: false
-
-Performance/FlatMap:
-  Description: >-
-                  Use `Enumerable#flat_map`
-                  instead of `Enumerable#map...Array#flatten(1)`
-                  or `Enumberable#collect..Array#flatten(1)`
-  Reference: 'https://github.com/JuanitoFatas/fast-ruby#enumerablemaparrayflatten-vs-enumerableflat_map-code'
-  Enabled: false
-
-Performance/ReverseEach:
-  Description: 'Use `reverse_each` instead of `reverse.each`.'
-  Reference: 'https://github.com/JuanitoFatas/fast-ruby#enumerablereverseeach-vs-enumerablereverse_each-code'
-  Enabled: false
-
-Performance/Size:
-  Description: >-
-                  Use `size` instead of `count` for counting
-                  the number of elements in `Array` and `Hash`.
-  Reference: 'https://github.com/JuanitoFatas/fast-ruby#arraycount-vs-arraysize-code'
-  Enabled: false
-
-Performance/StringReplacement:
-  Description: >-
-                  Use `tr` instead of `gsub` when you are replacing the same
-                  number of characters. Use `delete` instead of `gsub` when
-                  you are deleting characters.
-  Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringgsub-vs-stringtr-code'
-  Enabled: false
-
-# Rails
-
-Rails/ActionFilter:
-  Description: 'Enforces consistent use of action filter methods.'
-  Enabled: false
-
-Rails/Date:
-  Description: >-
-                  Checks the correct usage of date aware methods,
-                  such as Date.today, Date.current etc.
-  Enabled: false
-
-Rails/FindBy:
-  Description: 'Prefer find_by over where.first.'
-  Enabled: false
-
-Rails/FindEach:
-  Description: 'Prefer all.find_each over all.find.'
-  Enabled: false
-
-Rails/HasAndBelongsToMany:
-  Description: 'Prefer has_many :through to has_and_belongs_to_many.'
-  Enabled: false
-
-Rails/Output:
-  Description: 'Checks for calls to puts, print, etc.'
-  Enabled: false
-
-Rails/ReadWriteAttribute:
-  Description: >-
-                 Checks for read_attribute(:attr) and
-                 write_attribute(:attr, val).
-  Enabled: false
-
-Rails/ScopeArgs:
-  Description: 'Checks the arguments of ActiveRecord scopes.'
-  Enabled: false
-
-Rails/TimeZone:
-  Description: 'Checks the correct usage of time zone aware methods.'
-  StyleGuide: 'https://github.com/bbatsov/rails-style-guide#time'
-  Reference: 'http://danilenko.org/2012/7/6/rails_timezones'
-  Enabled: false
-
-Rails/Validation:
-  Description: 'Use validates :attribute, hash of validations.'
-  Enabled: false
diff --git a/style/ruby/README.md b/style/ruby/README.md
index 17171798..23f3a50f 100644
--- a/style/ruby/README.md
+++ b/style/ruby/README.md
@@ -3,24 +3,14 @@ Ruby
 
 [Sample](sample.rb)
 
+* Use [standard](https://github.com/testdouble/standard)
+
 * Avoid conditional modifiers (lines that end with conditionals). [36491dbb9]
 * Avoid multiple assignments per line (`one, two = 1, 2`). [#109]
 * Avoid organizational comments (`# Validations`). [#63]
 * Avoid ternary operators (`boolean ? true : false`). Use multi-line `if`
   instead to emphasize code branches. [36491dbb9]
-* Avoid explicit return statements. [#48]
-* Avoid using semicolons. [#108]
 * Avoid bang (!) method names. Prefer descriptive names. [#122]
-* Don't include spaces after `(`, `[` or before `]`, `)`.
-* Don't use `self` explicitly anywhere except class methods (`def self.method`)
-  and assignments (`self.attribute =`). [#89]
-* Don't vertically align tokens on consecutive lines.
-* If you break up a chain of method invocations, keep each method invocation on
-  its own line. Place the `.` at the end of each line, except the last.
-* If you break up a hash, keep the elements on their own lines and closing curly
-  brace on its own line.
-* Indent continued lines two spaces.
-* Indent private methods equal to public methods.
 * Name variables created by a factory after the factory (`user_factory`
   creates `user`).
 * Prefer nested class and module definitions over the shorthand version
@@ -29,56 +19,30 @@ Ruby
 * Prefer `select` over `find_all`. [0d819844]
 * Prefer `map` over `collect`. [0d819844]
 * Prefer `reduce` over `inject`. [#237]
-* Prefer double quotes for strings. [#174]
-* Prefer `&&` and `||` over `and` and `or`. [#153]
-* Prefer `!` over `not`. [#195]
 * Prefer `&:method_name` to `{ |item| item.method_name }` for simple method
   calls. [#183]
-* Prefer `if` over `unless`. [#254]
 * Use `_` for unused block parameters. [0d819844]
 * Prefix unused variables or parameters with underscore (`_`). [#335]
 * Suffix variables holding a factory with `_factory` (`user_factory`).
-* Use 2 space indentation (no tabs).
 * Use a leading underscore when defining instance variables for memoization.
   [#373]
-* Use an empty line between methods.
-* Use spaces after commas, after colons and semicolons, around `{` and before
-  `}`.
-* Use `%{}` for single-line strings containing double-quotes that require 
+* Use `%()` for single-line strings containing double-quotes that require 
   interpolation. [36491dbb9]
-* Use `{...}` for single-line blocks. Use `do..end` for multi-line blocks.
-  [0d819844]
 * Use `?` suffix for predicate methods. [0d819844]
-* Use `CamelCase` for classes and modules, `snake_case` for variables and
-  methods, `SCREAMING_SNAKE_CASE` for constants. [36491dbb9]
-* Use `def self.method`, not `def Class.method` or `class << self`. [40090e22]
+* Use `def self.method`, not `class << self`. [40090e22]
 * Use `def` with parentheses when there are arguments. [36491dbb9]
-* Don't use spaces after required keyword arguments. [Example][required kwargs]
-  [#205]
-* Use `each`, not `for`, for iteration. [36491dbb9]
-* Use a trailing comma after each item in a multi-line list, including the last
-  item. [Example][trailing comma example] [#167]
 * Use heredocs for multi-line strings. [36491dbb9]
 * Prefer `private` over `protected` for non-public `attr_reader`s,
   `attr_writer`s, and `attr_accessor`s. [#417], [#190]
 * Order class methods above instance methods. [#320]
 * Prefer method invocation over instance variables. [#331]
 
-[#48]: https://github.com/thoughtbot/guides/pull/48
 [#63]: https://github.com/thoughtbot/guides/pull/63
-[#89]: https://github.com/thoughtbot/guides/pull/89
-[#108]: https://github.com/thoughtbot/guides/pull/108
 [#109]: https://github.com/thoughtbot/guides/pull/109
 [#122]: https://github.com/thoughtbot/guides/pull/122
-[#153]: https://github.com/thoughtbot/guides/pull/153
-[#167]: https://github.com/thoughtbot/guides/pull/167
-[#174]: https://github.com/thoughtbot/guides/pull/174
 [#183]: https://github.com/thoughtbot/guides/pull/183
 [#190]: https://github.com/thoughtbot/guides/pull/190
-[#195]: https://github.com/thoughtbot/guides/pull/195
-[#205]: https://github.com/thoughtbot/guides/pull/205
 [#237]: https://github.com/thoughtbot/guides/pull/237
-[#254]: https://github.com/thoughtbot/guides/pull/254
 [#320]: https://github.com/thoughtbot/guides/pull/320
 [#331]: https://github.com/thoughtbot/guides/pull/331
 [#332]: https://github.com/thoughtbot/guides/pull/332
@@ -88,6 +52,4 @@ Ruby
 [0d819844]: https://github.com/thoughtbot/guides/commit/0d819844
 [36491dbb9]: https://github.com/thoughtbot/guides/commit/36491dbb9
 [40090e22]: https://github.com/thoughtbot/guides/commit/40090e22
-[trailing comma example]: /style/ruby/sample.rb#L53
-[required kwargs]: /style/ruby/sample.rb#L16
 [class definition example]: /style/ruby/sample.rb#L103
diff --git a/style/ruby/sample.rb b/style/ruby/sample.rb
index 32be77e2..6e7f997c 100644
--- a/style/ruby/sample.rb
+++ b/style/ruby/sample.rb
@@ -8,9 +8,9 @@ def initialize(attributes)
   end
 
   def method_with_arguments(argument_one, argument_two)
-    a_really_long_line_that_is_broken_up_over_multiple_lines_and.
-      subsequent_lines_are_indented_and.
-      each_method_lives_on_its_own_line
+    a_really_long_line_that_is_broken_up_over_multiple_lines_and
+      .subsequent_lines_are_indented_and
+      .each_method_lives_on_its_own_line
   end
 
   def method_with_required_keyword_arguments(one:, two:)
@@ -40,13 +40,13 @@ def method_that_returns_an_array
   end
 
   def method_that_returns_a_hash
-    { :key => "value" }
+    {key: "value"}
   end
 
   def method_with_large_hash
     {
-      :one => "value",
-      :two => "value",
+      one: "value",
+      two: "value"
     }
   end
 
@@ -54,7 +54,7 @@ def method_with_large_array
     [
       :one,
       :two,
-      :three,
+      :three
     ]
   end