diff --git a/Library/Homebrew/cli/args.rbi b/Library/Homebrew/cli/args.rbi
new file mode 100644
index 0000000000..2314e9c8f3
--- /dev/null
+++ b/Library/Homebrew/cli/args.rbi
@@ -0,0 +1,29 @@
+# typed: strict
+
+module Homebrew
+  module CLI
+    class Args < OpenStruct
+      def devel?; end
+
+      def HEAD?; end
+
+      def include_test?; end
+
+      def build_bottle?; end
+
+      def build_universal?; end
+
+      def build_from_source?; end
+
+      def named_args; end
+
+      def force_bottle?; end
+
+      def debug?; end
+
+      def quiet?; end
+
+      def verbose?; end
+    end
+  end
+end
diff --git a/Library/Homebrew/compat/cli/parser.rbi b/Library/Homebrew/compat/cli/parser.rbi
new file mode 100644
index 0000000000..39061bb798
--- /dev/null
+++ b/Library/Homebrew/compat/cli/parser.rbi
@@ -0,0 +1,15 @@
+# typed: strict
+
+module Homebrew
+  module CLI
+    class Parser
+      module Compat
+        include Kernel
+
+        module DeprecatedArgs
+          include Kernel
+        end
+      end
+    end
+  end
+end
diff --git a/Library/Homebrew/compat/dependencies_helpers.rbi b/Library/Homebrew/compat/dependencies_helpers.rbi
new file mode 100644
index 0000000000..3ea83b62b9
--- /dev/null
+++ b/Library/Homebrew/compat/dependencies_helpers.rbi
@@ -0,0 +1,9 @@
+# typed: strict
+
+module DependenciesHelpers
+  module Compat
+    include Kernel
+
+    def args_includes_ignores(args); end
+  end
+end
diff --git a/Library/Homebrew/compat/extend/nil.rbi b/Library/Homebrew/compat/extend/nil.rbi
new file mode 100644
index 0000000000..0a0adb9756
--- /dev/null
+++ b/Library/Homebrew/compat/extend/nil.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+class NilClass
+  module Compat
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/compat/extend/string.rbi b/Library/Homebrew/compat/extend/string.rbi
new file mode 100644
index 0000000000..4851c5b127
--- /dev/null
+++ b/Library/Homebrew/compat/extend/string.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+class String
+  module Compat
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/compat/formula.rbi b/Library/Homebrew/compat/formula.rbi
new file mode 100644
index 0000000000..976ddb4a12
--- /dev/null
+++ b/Library/Homebrew/compat/formula.rbi
@@ -0,0 +1,11 @@
+# typed: strict
+
+class Formula
+  module Compat
+    include Kernel
+
+    def any_installed_keg; end
+
+    def latest_installed_prefix; end
+  end
+end
diff --git a/Library/Homebrew/compat/os/mac.rbi b/Library/Homebrew/compat/os/mac.rbi
new file mode 100644
index 0000000000..b6156fa2e8
--- /dev/null
+++ b/Library/Homebrew/compat/os/mac.rbi
@@ -0,0 +1,11 @@
+# typed: strict
+
+module OS
+  module Mac
+    class << self
+      module Compat
+        include Kernel
+      end
+    end
+  end
+end
diff --git a/Library/Homebrew/dependable.rbi b/Library/Homebrew/dependable.rbi
new file mode 100644
index 0000000000..c8eda0640b
--- /dev/null
+++ b/Library/Homebrew/dependable.rbi
@@ -0,0 +1,5 @@
+# typed: strict
+
+module Dependable
+  def tags; end
+end
diff --git a/Library/Homebrew/dependencies_helpers.rbi b/Library/Homebrew/dependencies_helpers.rbi
new file mode 100644
index 0000000000..f2226a40f4
--- /dev/null
+++ b/Library/Homebrew/dependencies_helpers.rbi
@@ -0,0 +1,5 @@
+# typed: strict
+
+module DependenciesHelpers
+  include Kernel
+end
diff --git a/Library/Homebrew/extend/os/linux/system_config.rb b/Library/Homebrew/extend/os/linux/system_config.rb
index 154c805a1a..6c93d2a4fa 100644
--- a/Library/Homebrew/extend/os/linux/system_config.rb
+++ b/Library/Homebrew/extend/os/linux/system_config.rb
@@ -3,8 +3,11 @@
 
 require "formula"
 require "os/linux/glibc"
+require "system_command"
 
 module SystemConfig
+  include SystemCommand::Mixin
+
   HOST_RUBY_PATH = "/usr/bin/ruby"
 
   class << self
diff --git a/Library/Homebrew/extend/os/mac/system_config.rb b/Library/Homebrew/extend/os/mac/system_config.rb
index 3ea619e2db..6f70e60597 100644
--- a/Library/Homebrew/extend/os/mac/system_config.rb
+++ b/Library/Homebrew/extend/os/mac/system_config.rb
@@ -1,8 +1,12 @@
 # typed: true
 # frozen_string_literal: true
 
+require "system_command"
+
 module SystemConfig
   class << self
+    include SystemCommand::Mixin
+
     undef describe_java, describe_homebrew_ruby
 
     def describe_java
diff --git a/Library/Homebrew/global.rbi b/Library/Homebrew/global.rbi
new file mode 100644
index 0000000000..1557c3b769
--- /dev/null
+++ b/Library/Homebrew/global.rbi
@@ -0,0 +1,5 @@
+# typed: strict
+
+module Homebrew
+  include Kernel
+end
diff --git a/Library/Homebrew/help.rbi b/Library/Homebrew/help.rbi
new file mode 100644
index 0000000000..9db873c525
--- /dev/null
+++ b/Library/Homebrew/help.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module Homebrew
+  module Help
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/install.rbi b/Library/Homebrew/install.rbi
new file mode 100644
index 0000000000..5208127284
--- /dev/null
+++ b/Library/Homebrew/install.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module Homebrew
+  module Install
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/language/perl.rbi b/Library/Homebrew/language/perl.rbi
new file mode 100644
index 0000000000..9be98f1896
--- /dev/null
+++ b/Library/Homebrew/language/perl.rbi
@@ -0,0 +1,9 @@
+# typed: strict
+
+module Language
+  module Perl
+    module Shebang
+      include Kernel
+    end
+  end
+end
diff --git a/Library/Homebrew/os/linux.rbi b/Library/Homebrew/os/linux.rbi
new file mode 100644
index 0000000000..b6f3164683
--- /dev/null
+++ b/Library/Homebrew/os/linux.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module OS
+  module Linux
+    include ::Kernel
+  end
+end
diff --git a/Library/Homebrew/os/mac.rbi b/Library/Homebrew/os/mac.rbi
new file mode 100644
index 0000000000..85a546f554
--- /dev/null
+++ b/Library/Homebrew/os/mac.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module OS
+  module Mac
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/sorbet/rbi/cli.rbi b/Library/Homebrew/sorbet/rbi/cli.rbi
deleted file mode 100644
index f920abb0a5..0000000000
--- a/Library/Homebrew/sorbet/rbi/cli.rbi
+++ /dev/null
@@ -1,37 +0,0 @@
-# typed: strict
-
-module Homebrew::CLI
-  class Args < OpenStruct
-    def devel?; end
-
-    def HEAD?; end
-
-    def include_test?; end
-
-    def build_bottle?; end
-
-    def build_universal?; end
-
-    def build_from_source?; end
-
-    def named_args; end
-
-    def force_bottle?; end
-
-    def debug?; end
-
-    def quiet?; end
-
-    def verbose?; end
-  end
-
-
-  class Parser
-    module Compat
-      include Kernel
-      module DeprecatedArgs
-        include Kernel
-      end
-    end
-  end
-end
diff --git a/Library/Homebrew/sorbet/rbi/homebrew.rbi b/Library/Homebrew/sorbet/rbi/homebrew.rbi
deleted file mode 100644
index 6ada3bacff..0000000000
--- a/Library/Homebrew/sorbet/rbi/homebrew.rbi
+++ /dev/null
@@ -1,65 +0,0 @@
-# typed: strict
-
-module Homebrew
-  include Kernel
-end
-
-module Homebrew::Help
-  include Kernel
-end
-
-module Homebrew::Fetch
-  def args; end
-end
-
-module Homebrew::Install
-  include Kernel
-end
-
-module Language::Perl::Shebang
-  include Kernel
-end
-
-module Dependable
-  def tags; end
-end
-
-module DependenciesHelpers
-  include Kernel
-
-  module Compat
-    include Kernel
-
-    def args_includes_ignores(args); end
-  end
-end
-
-class Formula
-  module Compat
-    include Kernel
-
-    def latest_version_installed?; end
-
-    def active_spec; end
-
-    def any_installed_keg; end
-
-    def latest_installed_prefix; end
-
-    def patches; end
-  end
-end
-
-class NilClass
-  module Compat
-    include Kernel
-  end
-end
-
-class String
-  module Compat
-    include Kernel
-
-    def chomp; end
-  end
-end
diff --git a/Library/Homebrew/sorbet/rbi/os.rbi b/Library/Homebrew/sorbet/rbi/os.rbi
deleted file mode 100644
index f4b85f1f7e..0000000000
--- a/Library/Homebrew/sorbet/rbi/os.rbi
+++ /dev/null
@@ -1,22 +0,0 @@
-# typed: true
-
-module OS
-  module Linux
-    include Kernel
-
-    def which(cmd, path = ENV["PATH"])
-    end
-  end
-
-  module Mac
-    include Kernel
-  end
-end
-
-module OS::Mac
-  class << self
-    module Compat
-      include Kernel
-    end
-  end
-end
diff --git a/Library/Homebrew/sorbet/tapioca/require.rb b/Library/Homebrew/sorbet/tapioca/require.rb
index fe1388b13a..536e027e91 100644
--- a/Library/Homebrew/sorbet/tapioca/require.rb
+++ b/Library/Homebrew/sorbet/tapioca/require.rb
@@ -1,4 +1,4 @@
-# typed: false
+# typed: strict
 # frozen_string_literal: true
 
 # Add your extra requires here
diff --git a/Library/Homebrew/system_command.rb b/Library/Homebrew/system_command.rb
index 33f3781d7b..8ad098df1a 100644
--- a/Library/Homebrew/system_command.rb
+++ b/Library/Homebrew/system_command.rb
@@ -7,26 +7,25 @@ require "plist"
 require "shellwords"
 
 require "extend/io"
+require "extend/predicable"
 require "extend/hash_validator"
 using HashValidator
 
-# Make `system_command` available everywhere.
-#
-# @api private
-module Kernel
-  def system_command(*args)
-    SystemCommand.run(*args)
-  end
-
-  def system_command!(*args)
-    SystemCommand.run!(*args)
-  end
-end
-
 # Class for running sub-processes and capturing their output and exit status.
 #
 # @api private
 class SystemCommand
+  # Helper functions for calling `SystemCommand.run`.
+  module Mixin
+    def system_command(*args)
+      SystemCommand.run(*args)
+    end
+
+    def system_command!(*args)
+      SystemCommand.run!(*args)
+    end
+  end
+
   include Context
   extend Predicable
 
@@ -248,3 +247,7 @@ class SystemCommand
     private :warn_plist_garbage
   end
 end
+
+# Make `system_command` available everywhere.
+# FIXME: Include this explicitly only where it is needed.
+include SystemCommand::Mixin # rubocop:disable Style/MixinUsage
diff --git a/Library/Homebrew/system_config.rb b/Library/Homebrew/system_config.rb
index 5af0d7dbd2..02230bb9b4 100644
--- a/Library/Homebrew/system_config.rb
+++ b/Library/Homebrew/system_config.rb
@@ -5,12 +5,15 @@ require "hardware"
 require "software_spec"
 require "development_tools"
 require "extend/ENV"
+require "system_command"
 
 # Helper module for querying information about the system configuration.
 #
 # @api private
 module SystemConfig
   class << self
+    include SystemCommand::Mixin
+
     def clang
       @clang ||= if DevelopmentTools.installed?
         DevelopmentTools.clang_version
diff --git a/Library/Homebrew/unpack_strategy.rb b/Library/Homebrew/unpack_strategy.rb
index f76069f3b9..774d296156 100644
--- a/Library/Homebrew/unpack_strategy.rb
+++ b/Library/Homebrew/unpack_strategy.rb
@@ -1,10 +1,14 @@
 # typed: false
 # frozen_string_literal: true
 
+require "system_command"
+
 # Module containing all available strategies for unpacking archives.
 #
 # @api private
 module UnpackStrategy
+  include SystemCommand::Mixin
+
   # Helper module for identifying the file type.
   module Magic
     # Length of the longest regex (currently Tar).
diff --git a/Library/Homebrew/unpack_strategy/fossil.rb b/Library/Homebrew/unpack_strategy/fossil.rb
index c8f165fdd6..f421ee1be8 100644
--- a/Library/Homebrew/unpack_strategy/fossil.rb
+++ b/Library/Homebrew/unpack_strategy/fossil.rb
@@ -1,10 +1,13 @@
 # typed: true
 # frozen_string_literal: true
 
+require "system_command"
+
 module UnpackStrategy
   # Strategy for unpacking Fossil repositories.
   class Fossil
     include UnpackStrategy
+    extend SystemCommand::Mixin
 
     using Magic
 
diff --git a/Library/Homebrew/unpack_strategy/tar.rb b/Library/Homebrew/unpack_strategy/tar.rb
index 7e7b407bcd..a31550b75d 100644
--- a/Library/Homebrew/unpack_strategy/tar.rb
+++ b/Library/Homebrew/unpack_strategy/tar.rb
@@ -1,10 +1,13 @@
 # typed: true
 # frozen_string_literal: true
 
+require "system_command"
+
 module UnpackStrategy
   # Strategy for unpacking tar archives.
   class Tar
     include UnpackStrategy
+    extend SystemCommand::Mixin
 
     using Magic
 
diff --git a/Library/Homebrew/utils/inreplace.rb b/Library/Homebrew/utils/inreplace.rb
index f2827a8979..d130871167 100644
--- a/Library/Homebrew/utils/inreplace.rb
+++ b/Library/Homebrew/utils/inreplace.rb
@@ -8,7 +8,6 @@ module Utils
   #
   # @api private
   module Inreplace
-    include Kernel
     extend T::Sig
 
     # Error during replacement.
diff --git a/Library/Homebrew/utils/inreplace.rbi b/Library/Homebrew/utils/inreplace.rbi
new file mode 100644
index 0000000000..02542091d2
--- /dev/null
+++ b/Library/Homebrew/utils/inreplace.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module Utils
+  module Inreplace
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/utils/link.rb b/Library/Homebrew/utils/link.rb
index 1a726d5939..8078390f60 100644
--- a/Library/Homebrew/utils/link.rb
+++ b/Library/Homebrew/utils/link.rb
@@ -6,8 +6,6 @@ module Utils
   #
   # @api private
   module Link
-    include Kernel
-
     module_function
 
     def link_src_dst_dirs(src_dir, dst_dir, command, link_dir: false)
diff --git a/Library/Homebrew/utils/link.rbi b/Library/Homebrew/utils/link.rbi
new file mode 100644
index 0000000000..0b88a48d16
--- /dev/null
+++ b/Library/Homebrew/utils/link.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module Utils
+  module Link
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/utils/shebang.rb b/Library/Homebrew/utils/shebang.rb
index 2fdb721cad..762ddf5804 100644
--- a/Library/Homebrew/utils/shebang.rb
+++ b/Library/Homebrew/utils/shebang.rb
@@ -6,8 +6,6 @@ module Utils
   #
   # @api private
   module Shebang
-    include Kernel
-
     module_function
 
     # Specification on how to rewrite a given shebang.
diff --git a/Library/Homebrew/utils/shebang.rbi b/Library/Homebrew/utils/shebang.rbi
new file mode 100644
index 0000000000..9cdb0b2007
--- /dev/null
+++ b/Library/Homebrew/utils/shebang.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module Utils
+  module Shebang
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/utils/shell.rb b/Library/Homebrew/utils/shell.rb
index c469c3ad94..47a22749de 100644
--- a/Library/Homebrew/utils/shell.rb
+++ b/Library/Homebrew/utils/shell.rb
@@ -3,7 +3,6 @@
 
 module Utils
   module Shell
-    include Kernel
     extend T::Sig
 
     module_function
diff --git a/Library/Homebrew/utils/shell.rbi b/Library/Homebrew/utils/shell.rbi
new file mode 100644
index 0000000000..b860bc1190
--- /dev/null
+++ b/Library/Homebrew/utils/shell.rbi
@@ -0,0 +1,7 @@
+# typed: strict
+
+module Utils
+  module Shell
+    include Kernel
+  end
+end
diff --git a/Library/Homebrew/utils/svn.rb b/Library/Homebrew/utils/svn.rb
index febc3dee9a..e6f9fcd228 100644
--- a/Library/Homebrew/utils/svn.rb
+++ b/Library/Homebrew/utils/svn.rb
@@ -8,36 +8,36 @@ module Utils
   #
   # @api private
   module Svn
-    include Kernel
-    extend T::Sig
+    class << self
+      extend T::Sig
 
-    module_function
+      include SystemCommand::Mixin
 
-    sig { returns(T::Boolean) }
-    def available?
-      version.present?
-    end
+      sig { returns(T::Boolean) }
+      def available?
+        version.present?
+      end
 
-    sig { returns(T.nilable(String)) }
-    def version
-      return @version if defined?(@version)
+      sig { returns(T.nilable(String)) }
+      def version
+        return @version if defined?(@version)
 
-      stdout, _, status = system_command(HOMEBREW_SHIMS_PATH/"scm/svn", args: ["--version"], print_stderr: false)
-      @version = status.success? ? stdout.chomp[/svn, version (\d+(?:\.\d+)*)/, 1] : nil
-    end
+        stdout, _, status = system_command(HOMEBREW_SHIMS_PATH/"scm/svn", args: ["--version"], print_stderr: false)
+        @version = status.success? ? stdout.chomp[/svn, version (\d+(?:\.\d+)*)/, 1] : nil
+      end
 
-    sig { params(url: String).returns(T::Boolean) }
-    def remote_exists?(url)
-      return true unless available?
+      sig { params(url: String).returns(T::Boolean) }
+      def remote_exists?(url)
+        return true unless available?
 
-      # OK to unconditionally trust here because we're just checking if
-      # a URL exists.
-      quiet_system "svn", "ls", url, "--depth", "empty",
-                   "--non-interactive", "--trust-server-cert"
-    end
+        # OK to unconditionally trust here because we're just checking if a URL exists.
+        system_command("svn", args: ["ls", url, "--depth", "empty",
+                                     "--non-interactive", "--trust-server-cert"], print_stderr: false).success?
+      end
 
-    def clear_version_cache
-      remove_instance_variable(:@version) if defined?(@version)
+      def clear_version_cache
+        remove_instance_variable(:@version) if defined?(@version)
+      end
     end
   end
 end
diff --git a/Library/Homebrew/utils/tar.rb b/Library/Homebrew/utils/tar.rb
index fe65d32999..ced4ed5234 100644
--- a/Library/Homebrew/utils/tar.rb
+++ b/Library/Homebrew/utils/tar.rb
@@ -6,36 +6,34 @@ module Utils
   #
   # @api private
   module Tar
-    include Kernel
+    class << self
+      TAR_FILE_EXTENSIONS = %w[.tar .tb2 .tbz .tbz2 .tgz .tlz .txz .tZ].freeze
 
-    module_function
+      def available?
+        executable.present?
+      end
 
-    TAR_FILE_EXTENSIONS = %w[.tar .tb2 .tbz .tbz2 .tgz .tlz .txz .tZ].freeze
+      def executable
+        return @executable if defined?(@executable)
 
-    def available?
-      executable.present?
-    end
+        gnu_tar_gtar_path = HOMEBREW_PREFIX/"opt/gnu-tar/bin/gtar"
+        gnu_tar_gtar = gnu_tar_gtar_path if gnu_tar_gtar_path.executable?
+        @executable = which("gtar") || gnu_tar_gtar || which("tar")
+      end
 
-    def executable
-      return @executable if defined?(@executable)
+      def validate_file(path)
+        return unless available?
 
-      gnu_tar_gtar_path = HOMEBREW_PREFIX/"opt/gnu-tar/bin/gtar"
-      gnu_tar_gtar = gnu_tar_gtar_path if gnu_tar_gtar_path.executable?
-      @executable = which("gtar") || gnu_tar_gtar || which("tar")
-    end
+        path = Pathname.new(path)
+        return unless TAR_FILE_EXTENSIONS.include? path.extname
+        return if Utils.popen_read(executable, "-tf", path).match?(%r{/.*\.})
 
-    def validate_file(path)
-      return unless available?
+        odie "#{path} is not a valid tar file!"
+      end
 
-      path = Pathname.new(path)
-      return unless TAR_FILE_EXTENSIONS.include? path.extname
-      return if Utils.popen_read(executable, "-tf", path).match?(%r{/.*\.})
-
-      odie "#{path} is not a valid tar file!"
-    end
-
-    def clear_executable_cache
-      remove_instance_variable(:@executable) if defined?(@executable)
+      def clear_executable_cache
+        remove_instance_variable(:@executable) if defined?(@executable)
+      end
     end
   end
 end
diff --git a/Library/Homebrew/utils/tty.rb b/Library/Homebrew/utils/tty.rb
index 991c79336b..01ebc1b214 100644
--- a/Library/Homebrew/utils/tty.rb
+++ b/Library/Homebrew/utils/tty.rb
@@ -5,122 +5,116 @@
 #
 # @api private
 module Tty
-  include Kernel
-  extend T::Sig
-
   @stream = $stdout
 
-  module_function
+  class << self
+    extend T::Sig
 
-  sig { params(stream: IO, _block: T.proc.params(arg0: IO).void).void }
-  def with(stream, &_block)
-    previous_stream = @stream
-    @stream = stream
+    sig { params(stream: T.any(IO, StringIO), _block: T.proc.params(arg0: T.any(IO, StringIO)).void).void }
+    def with(stream, &_block)
+      previous_stream = @stream
+      @stream = stream
 
-    yield stream
-  ensure
-    @stream = previous_stream
-  end
-
-  sig { params(string: String).returns(String) }
-  def strip_ansi(string)
-    string.gsub(/\033\[\d+(;\d+)*m/, "")
-  end
-
-  sig { returns(Integer) }
-  def width
-    @width ||= begin
-      _, width = `/bin/stty size 2>/dev/null`.split
-      width, = `/usr/bin/tput cols 2>/dev/null`.split if width.to_i.zero?
-      width ||= 80
-      width.to_i
+      yield stream
+    ensure
+      @stream = previous_stream
     end
-  end
 
-  sig { params(string: String).returns(String) }
-  def truncate(string)
-    (w = width).zero? ? string.to_s : (string.to_s[0, w - 4] || "")
-  end
-
-  COLOR_CODES = {
-    red:     31,
-    green:   32,
-    yellow:  33,
-    blue:    34,
-    magenta: 35,
-    cyan:    36,
-    default: 39,
-  }.freeze
-
-  STYLE_CODES = {
-    reset:         0,
-    bold:          1,
-    italic:        3,
-    underline:     4,
-    strikethrough: 9,
-    no_underline:  24,
-  }.freeze
-
-  SPECIAL_CODES = {
-    up:         "1A",
-    down:       "1B",
-    right:      "1C",
-    left:       "1D",
-    erase_line: "K",
-    erase_char: "P",
-  }.freeze
-
-  CODES = COLOR_CODES.merge(STYLE_CODES).freeze
-
-  sig { params(code: Integer).returns(T.self_type) }
-  def append_to_escape_sequence(code)
-    @escape_sequence ||= []
-    @escape_sequence << code
-    self
-  end
-
-  sig { returns(String) }
-  def current_escape_sequence
-    return "" if @escape_sequence.nil?
-
-    "\033[#{@escape_sequence.join(";")}m"
-  end
-
-  sig { void }
-  def reset_escape_sequence!
-    @escape_sequence = nil
-  end
-
-  CODES.each do |name, code|
-    define_singleton_method(name) do
-      append_to_escape_sequence(code)
+    sig { params(string: String).returns(String) }
+    def strip_ansi(string)
+      string.gsub(/\033\[\d+(;\d+)*m/, "")
     end
-  end
 
-  SPECIAL_CODES.each do |name, code|
-    define_singleton_method(name) do
-      if @stream.tty?
-        "\033[#{code}"
-      else
-        ""
+    sig { returns(Integer) }
+    def width
+      @width ||= begin
+        _, width = `/bin/stty size 2>/dev/null`.split
+        width, = `/usr/bin/tput cols 2>/dev/null`.split if width.to_i.zero?
+        width ||= 80
+        width.to_i
       end
     end
-  end
 
-  sig { returns(String) }
-  def to_s
-    return "" unless color?
+    sig { params(string: String).returns(String) }
+    def truncate(string)
+      (w = width).zero? ? string.to_s : (string.to_s[0, w - 4] || "")
+    end
 
-    current_escape_sequence
-  ensure
-    reset_escape_sequence!
-  end
+    COLOR_CODES = {
+      red:     31,
+      green:   32,
+      yellow:  33,
+      blue:    34,
+      magenta: 35,
+      cyan:    36,
+      default: 39,
+    }.freeze
 
-  sig { returns(T::Boolean) }
-  def color?
-    return false if Homebrew::EnvConfig.no_color?
-    return true if Homebrew::EnvConfig.color?
+    STYLE_CODES = {
+      reset:         0,
+      bold:          1,
+      italic:        3,
+      underline:     4,
+      strikethrough: 9,
+      no_underline:  24,
+    }.freeze
 
-    @stream.tty?
-  end
+    SPECIAL_CODES = {
+      up:         "1A",
+      down:       "1B",
+      right:      "1C",
+      left:       "1D",
+      erase_line: "K",
+      erase_char: "P",
+    }.freeze
+
+    CODES = COLOR_CODES.merge(STYLE_CODES).freeze
+
+    sig { returns(String) }
+    def current_escape_sequence
+      return "" if @escape_sequence.nil?
+
+      "\033[#{@escape_sequence.join(";")}m"
+    end
+
+    sig { void }
+    def reset_escape_sequence!
+      @escape_sequence = nil
+    end
+
+    CODES.each do |name, code|
+      define_method(name) do
+        @escape_sequence ||= []
+        @escape_sequence << code
+        self
+      end
+    end
+
+    SPECIAL_CODES.each do |name, code|
+      define_method(name) do
+        if @stream.tty?
+          "\033[#{code}"
+        else
+          ""
+        end
+      end
+    end
+
+    sig { returns(String) }
+    def to_s
+      return "" unless color?
+
+      current_escape_sequence
+    ensure
+      reset_escape_sequence!
+    end
+
+    sig { returns(T::Boolean) }
+    def color?
+      return false if Homebrew::EnvConfig.no_color?
+      return true if Homebrew::EnvConfig.color?
+
+      @stream.tty?
+    end
+end
 end
diff --git a/Library/Homebrew/utils/user.rb b/Library/Homebrew/utils/user.rb
index 238cbdd864..c2db57e637 100644
--- a/Library/Homebrew/utils/user.rb
+++ b/Library/Homebrew/utils/user.rb
@@ -10,9 +10,10 @@ require "system_command"
 #
 # @api private
 class User < SimpleDelegator
-  include Kernel
   extend T::Sig
 
+  include SystemCommand::Mixin
+
   # Return whether the user has an active GUI session.
   sig { returns(T::Boolean) }
   def gui?