diff --git a/Library/Homebrew/PATH.rb b/Library/Homebrew/PATH.rb
index 8fb226998..f9c347d6e 100644
--- a/Library/Homebrew/PATH.rb
+++ b/Library/Homebrew/PATH.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Represention of a `*PATH` environment variable.
diff --git a/Library/Homebrew/bintray.rb b/Library/Homebrew/bintray.rb
index 5d8b89ed5..829b1da11 100644
--- a/Library/Homebrew/bintray.rb
+++ b/Library/Homebrew/bintray.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/curl"
diff --git a/Library/Homebrew/brew.rb b/Library/Homebrew/brew.rb
index 6caee8c39..2240161dc 100644
--- a/Library/Homebrew/brew.rb
+++ b/Library/Homebrew/brew.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 if ENV["HOMEBREW_STACKPROF"]
diff --git a/Library/Homebrew/build.rb b/Library/Homebrew/build.rb
index a5e374018..f7c427487 100644
--- a/Library/Homebrew/build.rb
+++ b/Library/Homebrew/build.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # This script is loaded by formula_installer as a separate instance.
diff --git a/Library/Homebrew/build_environment.rb b/Library/Homebrew/build_environment.rb
index ed6f31973..6b4e7f052 100644
--- a/Library/Homebrew/build_environment.rb
+++ b/Library/Homebrew/build_environment.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Settings for the build environment.
diff --git a/Library/Homebrew/build_options.rb b/Library/Homebrew/build_options.rb
index f4f51be48..de78b0947 100644
--- a/Library/Homebrew/build_options.rb
+++ b/Library/Homebrew/build_options.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Options for a formula build.
diff --git a/Library/Homebrew/cache_store.rb b/Library/Homebrew/cache_store.rb
index 6dd3768ae..982f15c48 100644
--- a/Library/Homebrew/cache_store.rb
+++ b/Library/Homebrew/cache_store.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "json"
diff --git a/Library/Homebrew/cask.rb b/Library/Homebrew/cask.rb
index e39f0328b..f4b32a21f 100644
--- a/Library/Homebrew/cask.rb
+++ b/Library/Homebrew/cask.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact"
diff --git a/Library/Homebrew/cask/artifact.rb b/Library/Homebrew/cask/artifact.rb
index a86b3232e..bee610cfb 100644
--- a/Library/Homebrew/cask/artifact.rb
+++ b/Library/Homebrew/cask/artifact.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/app"
diff --git a/Library/Homebrew/cask/artifact/abstract_artifact.rb b/Library/Homebrew/cask/artifact/abstract_artifact.rb
index 1a6b01900..50c2b325e 100644
--- a/Library/Homebrew/cask/artifact/abstract_artifact.rb
+++ b/Library/Homebrew/cask/artifact/abstract_artifact.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/artifact/abstract_flight_block.rb b/Library/Homebrew/cask/artifact/abstract_flight_block.rb
index 053294e7f..1695a257a 100644
--- a/Library/Homebrew/cask/artifact/abstract_flight_block.rb
+++ b/Library/Homebrew/cask/artifact/abstract_flight_block.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_artifact"
diff --git a/Library/Homebrew/cask/artifact/abstract_uninstall.rb b/Library/Homebrew/cask/artifact/abstract_uninstall.rb
index 9cce7ed34..b0da73866 100644
--- a/Library/Homebrew/cask/artifact/abstract_uninstall.rb
+++ b/Library/Homebrew/cask/artifact/abstract_uninstall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "timeout"
diff --git a/Library/Homebrew/cask/artifact/app.rb b/Library/Homebrew/cask/artifact/app.rb
index 01cbec77f..c2ec38df4 100644
--- a/Library/Homebrew/cask/artifact/app.rb
+++ b/Library/Homebrew/cask/artifact/app.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/artifact.rb b/Library/Homebrew/cask/artifact/artifact.rb
index 3d81ab65b..f6b350a82 100644
--- a/Library/Homebrew/cask/artifact/artifact.rb
+++ b/Library/Homebrew/cask/artifact/artifact.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/audio_unit_plugin.rb b/Library/Homebrew/cask/artifact/audio_unit_plugin.rb
index c22c132d4..1fe7cf108 100644
--- a/Library/Homebrew/cask/artifact/audio_unit_plugin.rb
+++ b/Library/Homebrew/cask/artifact/audio_unit_plugin.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/binary.rb b/Library/Homebrew/cask/artifact/binary.rb
index a1f817ca7..a8c7d5545 100644
--- a/Library/Homebrew/cask/artifact/binary.rb
+++ b/Library/Homebrew/cask/artifact/binary.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/artifact/symlinked"
diff --git a/Library/Homebrew/cask/artifact/colorpicker.rb b/Library/Homebrew/cask/artifact/colorpicker.rb
index 48b245245..545389369 100644
--- a/Library/Homebrew/cask/artifact/colorpicker.rb
+++ b/Library/Homebrew/cask/artifact/colorpicker.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/dictionary.rb b/Library/Homebrew/cask/artifact/dictionary.rb
index 03fded17f..50749b2bd 100644
--- a/Library/Homebrew/cask/artifact/dictionary.rb
+++ b/Library/Homebrew/cask/artifact/dictionary.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/font.rb b/Library/Homebrew/cask/artifact/font.rb
index 164731c16..caa2fcc7b 100644
--- a/Library/Homebrew/cask/artifact/font.rb
+++ b/Library/Homebrew/cask/artifact/font.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/input_method.rb b/Library/Homebrew/cask/artifact/input_method.rb
index 9cd6b3623..79b3acaad 100644
--- a/Library/Homebrew/cask/artifact/input_method.rb
+++ b/Library/Homebrew/cask/artifact/input_method.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/installer.rb b/Library/Homebrew/cask/artifact/installer.rb
index 7ec14f611..c2fa6543c 100644
--- a/Library/Homebrew/cask/artifact/installer.rb
+++ b/Library/Homebrew/cask/artifact/installer.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_artifact"
diff --git a/Library/Homebrew/cask/artifact/internet_plugin.rb b/Library/Homebrew/cask/artifact/internet_plugin.rb
index 6e22874a4..73c655a52 100644
--- a/Library/Homebrew/cask/artifact/internet_plugin.rb
+++ b/Library/Homebrew/cask/artifact/internet_plugin.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/manpage.rb b/Library/Homebrew/cask/artifact/manpage.rb
index 66453f2db..3824296cb 100644
--- a/Library/Homebrew/cask/artifact/manpage.rb
+++ b/Library/Homebrew/cask/artifact/manpage.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/artifact/symlinked"
diff --git a/Library/Homebrew/cask/artifact/mdimporter.rb b/Library/Homebrew/cask/artifact/mdimporter.rb
index c11cb9cc4..226a01e1c 100644
--- a/Library/Homebrew/cask/artifact/mdimporter.rb
+++ b/Library/Homebrew/cask/artifact/mdimporter.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/moved.rb b/Library/Homebrew/cask/artifact/moved.rb
index 5925b86f4..083c61244 100644
--- a/Library/Homebrew/cask/artifact/moved.rb
+++ b/Library/Homebrew/cask/artifact/moved.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/relocated"
diff --git a/Library/Homebrew/cask/artifact/pkg.rb b/Library/Homebrew/cask/artifact/pkg.rb
index c70f2658d..9b5b5f157 100644
--- a/Library/Homebrew/cask/artifact/pkg.rb
+++ b/Library/Homebrew/cask/artifact/pkg.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "plist"
diff --git a/Library/Homebrew/cask/artifact/postflight_block.rb b/Library/Homebrew/cask/artifact/postflight_block.rb
index c672057d8..00d170fda 100644
--- a/Library/Homebrew/cask/artifact/postflight_block.rb
+++ b/Library/Homebrew/cask/artifact/postflight_block.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_flight_block"
diff --git a/Library/Homebrew/cask/artifact/preflight_block.rb b/Library/Homebrew/cask/artifact/preflight_block.rb
index f6f8882c7..0b7f21c8e 100644
--- a/Library/Homebrew/cask/artifact/preflight_block.rb
+++ b/Library/Homebrew/cask/artifact/preflight_block.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_flight_block"
diff --git a/Library/Homebrew/cask/artifact/prefpane.rb b/Library/Homebrew/cask/artifact/prefpane.rb
index 8447c67c1..aed47644e 100644
--- a/Library/Homebrew/cask/artifact/prefpane.rb
+++ b/Library/Homebrew/cask/artifact/prefpane.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/qlplugin.rb b/Library/Homebrew/cask/artifact/qlplugin.rb
index 30588c623..e0c26a6dc 100644
--- a/Library/Homebrew/cask/artifact/qlplugin.rb
+++ b/Library/Homebrew/cask/artifact/qlplugin.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/relocated.rb b/Library/Homebrew/cask/artifact/relocated.rb
index 3f0da05eb..5c9dd0dbd 100644
--- a/Library/Homebrew/cask/artifact/relocated.rb
+++ b/Library/Homebrew/cask/artifact/relocated.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_artifact"
diff --git a/Library/Homebrew/cask/artifact/screen_saver.rb b/Library/Homebrew/cask/artifact/screen_saver.rb
index f8f73e702..c52e0361d 100644
--- a/Library/Homebrew/cask/artifact/screen_saver.rb
+++ b/Library/Homebrew/cask/artifact/screen_saver.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/service.rb b/Library/Homebrew/cask/artifact/service.rb
index 9a92a6506..901cb5ac0 100644
--- a/Library/Homebrew/cask/artifact/service.rb
+++ b/Library/Homebrew/cask/artifact/service.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/stage_only.rb b/Library/Homebrew/cask/artifact/stage_only.rb
index a013388e2..c67cac6d3 100644
--- a/Library/Homebrew/cask/artifact/stage_only.rb
+++ b/Library/Homebrew/cask/artifact/stage_only.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_artifact"
diff --git a/Library/Homebrew/cask/artifact/suite.rb b/Library/Homebrew/cask/artifact/suite.rb
index be8f34820..a236a602e 100644
--- a/Library/Homebrew/cask/artifact/suite.rb
+++ b/Library/Homebrew/cask/artifact/suite.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/symlinked.rb b/Library/Homebrew/cask/artifact/symlinked.rb
index 1feeda027..68e8dbe18 100644
--- a/Library/Homebrew/cask/artifact/symlinked.rb
+++ b/Library/Homebrew/cask/artifact/symlinked.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/relocated"
diff --git a/Library/Homebrew/cask/artifact/uninstall.rb b/Library/Homebrew/cask/artifact/uninstall.rb
index 00b385e64..0d924446d 100644
--- a/Library/Homebrew/cask/artifact/uninstall.rb
+++ b/Library/Homebrew/cask/artifact/uninstall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_uninstall"
diff --git a/Library/Homebrew/cask/artifact/vst3_plugin.rb b/Library/Homebrew/cask/artifact/vst3_plugin.rb
index e82690d84..bd69c57a4 100644
--- a/Library/Homebrew/cask/artifact/vst3_plugin.rb
+++ b/Library/Homebrew/cask/artifact/vst3_plugin.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/vst_plugin.rb b/Library/Homebrew/cask/artifact/vst_plugin.rb
index 058ea5052..976ae18d6 100644
--- a/Library/Homebrew/cask/artifact/vst_plugin.rb
+++ b/Library/Homebrew/cask/artifact/vst_plugin.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/artifact/moved"
diff --git a/Library/Homebrew/cask/artifact/zap.rb b/Library/Homebrew/cask/artifact/zap.rb
index 6967f922c..80485f23d 100644
--- a/Library/Homebrew/cask/artifact/zap.rb
+++ b/Library/Homebrew/cask/artifact/zap.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/abstract_uninstall"
diff --git a/Library/Homebrew/cask/audit.rb b/Library/Homebrew/cask/audit.rb
index cab1b48db..09bde070a 100644
--- a/Library/Homebrew/cask/audit.rb
+++ b/Library/Homebrew/cask/audit.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/denylist"
diff --git a/Library/Homebrew/cask/auditor.rb b/Library/Homebrew/cask/auditor.rb
index 264c04b7a..a201c4fe3 100644
--- a/Library/Homebrew/cask/auditor.rb
+++ b/Library/Homebrew/cask/auditor.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/audit"
diff --git a/Library/Homebrew/cask/cache.rb b/Library/Homebrew/cask/cache.rb
index 2d1dcc570..1cd57f906 100644
--- a/Library/Homebrew/cask/cache.rb
+++ b/Library/Homebrew/cask/cache.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cask.rb b/Library/Homebrew/cask/cask.rb
index bb2b93279..8858922a0 100644
--- a/Library/Homebrew/cask/cask.rb
+++ b/Library/Homebrew/cask/cask.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cask_loader"
diff --git a/Library/Homebrew/cask/cask_loader.rb b/Library/Homebrew/cask/cask_loader.rb
index 8946c3b58..8ec015a93 100644
--- a/Library/Homebrew/cask/cask_loader.rb
+++ b/Library/Homebrew/cask/cask_loader.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cache"
diff --git a/Library/Homebrew/cask/caskroom.rb b/Library/Homebrew/cask/caskroom.rb
index e2b3841c3..ab9c1b4dc 100644
--- a/Library/Homebrew/cask/caskroom.rb
+++ b/Library/Homebrew/cask/caskroom.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/user"
diff --git a/Library/Homebrew/cask/cmd.rb b/Library/Homebrew/cask/cmd.rb
index 38795bffe..5c62cb73e 100644
--- a/Library/Homebrew/cask/cmd.rb
+++ b/Library/Homebrew/cask/cmd.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "optparse"
diff --git a/Library/Homebrew/cask/cmd/--cache.rb b/Library/Homebrew/cask/cmd/--cache.rb
index 81d3acc7d..613841f7c 100644
--- a/Library/Homebrew/cask/cmd/--cache.rb
+++ b/Library/Homebrew/cask/cmd/--cache.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/abstract_command.rb b/Library/Homebrew/cask/cmd/abstract_command.rb
index 4a5556725..cf4ca79a0 100644
--- a/Library/Homebrew/cask/cmd/abstract_command.rb
+++ b/Library/Homebrew/cask/cmd/abstract_command.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "search"
diff --git a/Library/Homebrew/cask/cmd/abstract_internal_command.rb b/Library/Homebrew/cask/cmd/abstract_internal_command.rb
index b15b9acc9..7ccc3937b 100644
--- a/Library/Homebrew/cask/cmd/abstract_internal_command.rb
+++ b/Library/Homebrew/cask/cmd/abstract_internal_command.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/audit.rb b/Library/Homebrew/cask/cmd/audit.rb
index c9f1dda0f..6deeb84f8 100644
--- a/Library/Homebrew/cask/cmd/audit.rb
+++ b/Library/Homebrew/cask/cmd/audit.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/github/actions"
diff --git a/Library/Homebrew/cask/cmd/cat.rb b/Library/Homebrew/cask/cmd/cat.rb
index 3d731b1d6..fb7944300 100644
--- a/Library/Homebrew/cask/cmd/cat.rb
+++ b/Library/Homebrew/cask/cmd/cat.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/create.rb b/Library/Homebrew/cask/cmd/create.rb
index c190161fa..7ae14dc7d 100644
--- a/Library/Homebrew/cask/cmd/create.rb
+++ b/Library/Homebrew/cask/cmd/create.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/doctor.rb b/Library/Homebrew/cask/cmd/doctor.rb
index dafc4e577..0c80dcef2 100644
--- a/Library/Homebrew/cask/cmd/doctor.rb
+++ b/Library/Homebrew/cask/cmd/doctor.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/edit.rb b/Library/Homebrew/cask/cmd/edit.rb
index bbeffbf73..bea10bf63 100644
--- a/Library/Homebrew/cask/cmd/edit.rb
+++ b/Library/Homebrew/cask/cmd/edit.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/fetch.rb b/Library/Homebrew/cask/cmd/fetch.rb
index e42208a31..d9b335183 100644
--- a/Library/Homebrew/cask/cmd/fetch.rb
+++ b/Library/Homebrew/cask/cmd/fetch.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/help.rb b/Library/Homebrew/cask/cmd/help.rb
index fee20683d..721ac4084 100644
--- a/Library/Homebrew/cask/cmd/help.rb
+++ b/Library/Homebrew/cask/cmd/help.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/home.rb b/Library/Homebrew/cask/cmd/home.rb
index 291256519..8087f21fa 100644
--- a/Library/Homebrew/cask/cmd/home.rb
+++ b/Library/Homebrew/cask/cmd/home.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/info.rb b/Library/Homebrew/cask/cmd/info.rb
index 683057a13..e4e0797f7 100644
--- a/Library/Homebrew/cask/cmd/info.rb
+++ b/Library/Homebrew/cask/cmd/info.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "json"
diff --git a/Library/Homebrew/cask/cmd/install.rb b/Library/Homebrew/cask/cmd/install.rb
index a532bb521..a5ad63d19 100644
--- a/Library/Homebrew/cask/cmd/install.rb
+++ b/Library/Homebrew/cask/cmd/install.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/internal_help.rb b/Library/Homebrew/cask/cmd/internal_help.rb
index edd33fc2d..2091f48f9 100644
--- a/Library/Homebrew/cask/cmd/internal_help.rb
+++ b/Library/Homebrew/cask/cmd/internal_help.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/internal_stanza.rb b/Library/Homebrew/cask/cmd/internal_stanza.rb
index c392d508a..2c473cda1 100644
--- a/Library/Homebrew/cask/cmd/internal_stanza.rb
+++ b/Library/Homebrew/cask/cmd/internal_stanza.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/dsl"
diff --git a/Library/Homebrew/cask/cmd/list.rb b/Library/Homebrew/cask/cmd/list.rb
index 208464eda..859d650a9 100644
--- a/Library/Homebrew/cask/cmd/list.rb
+++ b/Library/Homebrew/cask/cmd/list.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/artifact/relocated"
diff --git a/Library/Homebrew/cask/cmd/outdated.rb b/Library/Homebrew/cask/cmd/outdated.rb
index 231648c09..ff35a1f2d 100644
--- a/Library/Homebrew/cask/cmd/outdated.rb
+++ b/Library/Homebrew/cask/cmd/outdated.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/reinstall.rb b/Library/Homebrew/cask/cmd/reinstall.rb
index c1e066bb1..79e0dccc4 100644
--- a/Library/Homebrew/cask/cmd/reinstall.rb
+++ b/Library/Homebrew/cask/cmd/reinstall.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/style.rb b/Library/Homebrew/cask/cmd/style.rb
index fc3cb6018..1d0715630 100644
--- a/Library/Homebrew/cask/cmd/style.rb
+++ b/Library/Homebrew/cask/cmd/style.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "json"
diff --git a/Library/Homebrew/cask/cmd/uninstall.rb b/Library/Homebrew/cask/cmd/uninstall.rb
index 89a85cd20..801119334 100644
--- a/Library/Homebrew/cask/cmd/uninstall.rb
+++ b/Library/Homebrew/cask/cmd/uninstall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/cmd/upgrade.rb b/Library/Homebrew/cask/cmd/upgrade.rb
index e83cb4dd3..daf753689 100644
--- a/Library/Homebrew/cask/cmd/upgrade.rb
+++ b/Library/Homebrew/cask/cmd/upgrade.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "env_config"
diff --git a/Library/Homebrew/cask/cmd/zap.rb b/Library/Homebrew/cask/cmd/zap.rb
index c2e981301..2898883ef 100644
--- a/Library/Homebrew/cask/cmd/zap.rb
+++ b/Library/Homebrew/cask/cmd/zap.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/config.rb b/Library/Homebrew/cask/config.rb
index 04a71b9e3..9f3532037 100644
--- a/Library/Homebrew/cask/config.rb
+++ b/Library/Homebrew/cask/config.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "json"
diff --git a/Library/Homebrew/cask/denylist.rb b/Library/Homebrew/cask/denylist.rb
index dda4326ba..8cbc9c37a 100644
--- a/Library/Homebrew/cask/denylist.rb
+++ b/Library/Homebrew/cask/denylist.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/download.rb b/Library/Homebrew/cask/download.rb
index 16c1dbd81..12e8a575f 100644
--- a/Library/Homebrew/cask/download.rb
+++ b/Library/Homebrew/cask/download.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "fileutils"
diff --git a/Library/Homebrew/cask/dsl.rb b/Library/Homebrew/cask/dsl.rb
index 2f8b2c8cf..6ea009940 100644
--- a/Library/Homebrew/cask/dsl.rb
+++ b/Library/Homebrew/cask/dsl.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "locale"
diff --git a/Library/Homebrew/cask/dsl/appcast.rb b/Library/Homebrew/cask/dsl/appcast.rb
index 1c9ebc360..c29a79819 100644
--- a/Library/Homebrew/cask/dsl/appcast.rb
+++ b/Library/Homebrew/cask/dsl/appcast.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/dsl/base.rb b/Library/Homebrew/cask/dsl/base.rb
index f8d40aadd..d1a29f61d 100644
--- a/Library/Homebrew/cask/dsl/base.rb
+++ b/Library/Homebrew/cask/dsl/base.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/utils"
diff --git a/Library/Homebrew/cask/dsl/caveats.rb b/Library/Homebrew/cask/dsl/caveats.rb
index d9933d992..26d8d7fc7 100644
--- a/Library/Homebrew/cask/dsl/caveats.rb
+++ b/Library/Homebrew/cask/dsl/caveats.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/dsl/conflicts_with.rb b/Library/Homebrew/cask/dsl/conflicts_with.rb
index f49f3a062..da47113ab 100644
--- a/Library/Homebrew/cask/dsl/conflicts_with.rb
+++ b/Library/Homebrew/cask/dsl/conflicts_with.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "delegate"
diff --git a/Library/Homebrew/cask/dsl/container.rb b/Library/Homebrew/cask/dsl/container.rb
index 60cfbdb44..22c146f31 100644
--- a/Library/Homebrew/cask/dsl/container.rb
+++ b/Library/Homebrew/cask/dsl/container.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "unpack_strategy"
diff --git a/Library/Homebrew/cask/dsl/depends_on.rb b/Library/Homebrew/cask/dsl/depends_on.rb
index a3721b053..f78636609 100644
--- a/Library/Homebrew/cask/dsl/depends_on.rb
+++ b/Library/Homebrew/cask/dsl/depends_on.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "delegate"
diff --git a/Library/Homebrew/cask/dsl/postflight.rb b/Library/Homebrew/cask/dsl/postflight.rb
index cccfac6c9..209533ba7 100644
--- a/Library/Homebrew/cask/dsl/postflight.rb
+++ b/Library/Homebrew/cask/dsl/postflight.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/staged"
diff --git a/Library/Homebrew/cask/dsl/preflight.rb b/Library/Homebrew/cask/dsl/preflight.rb
index eba210668..d1f0e5709 100644
--- a/Library/Homebrew/cask/dsl/preflight.rb
+++ b/Library/Homebrew/cask/dsl/preflight.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/dsl/uninstall_postflight.rb b/Library/Homebrew/cask/dsl/uninstall_postflight.rb
index fac89d764..9dc523b05 100644
--- a/Library/Homebrew/cask/dsl/uninstall_postflight.rb
+++ b/Library/Homebrew/cask/dsl/uninstall_postflight.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/dsl/uninstall_preflight.rb b/Library/Homebrew/cask/dsl/uninstall_preflight.rb
index 770fc680a..d35da3f51 100644
--- a/Library/Homebrew/cask/dsl/uninstall_preflight.rb
+++ b/Library/Homebrew/cask/dsl/uninstall_preflight.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/staged"
diff --git a/Library/Homebrew/cask/dsl/version.rb b/Library/Homebrew/cask/dsl/version.rb
index 53d58b996..a43658b18 100644
--- a/Library/Homebrew/cask/dsl/version.rb
+++ b/Library/Homebrew/cask/dsl/version.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/exceptions.rb b/Library/Homebrew/cask/exceptions.rb
index e67831d38..645ea8a0e 100644
--- a/Library/Homebrew/cask/exceptions.rb
+++ b/Library/Homebrew/cask/exceptions.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/installer.rb b/Library/Homebrew/cask/installer.rb
index 6efeeada6..a5a43851b 100644
--- a/Library/Homebrew/cask/installer.rb
+++ b/Library/Homebrew/cask/installer.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula_installer"
diff --git a/Library/Homebrew/cask/macos.rb b/Library/Homebrew/cask/macos.rb
index cf65def61..be2693b23 100644
--- a/Library/Homebrew/cask/macos.rb
+++ b/Library/Homebrew/cask/macos.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "os/mac/version"
diff --git a/Library/Homebrew/cask/metadata.rb b/Library/Homebrew/cask/metadata.rb
index 8c12de10b..4fcdd23f2 100644
--- a/Library/Homebrew/cask/metadata.rb
+++ b/Library/Homebrew/cask/metadata.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask/pkg.rb b/Library/Homebrew/cask/pkg.rb
index f015ee9de..b5e625e6f 100644
--- a/Library/Homebrew/cask/pkg.rb
+++ b/Library/Homebrew/cask/pkg.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/macos"
diff --git a/Library/Homebrew/cask/quarantine.rb b/Library/Homebrew/cask/quarantine.rb
index a90a7ea94..14e74c7af 100644
--- a/Library/Homebrew/cask/quarantine.rb
+++ b/Library/Homebrew/cask/quarantine.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "development_tools"
diff --git a/Library/Homebrew/cask/staged.rb b/Library/Homebrew/cask/staged.rb
index 73dd826e9..76dd66323 100644
--- a/Library/Homebrew/cask/staged.rb
+++ b/Library/Homebrew/cask/staged.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/user"
diff --git a/Library/Homebrew/cask/topological_hash.rb b/Library/Homebrew/cask/topological_hash.rb
index bfd857382..79c0485bf 100644
--- a/Library/Homebrew/cask/topological_hash.rb
+++ b/Library/Homebrew/cask/topological_hash.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "tsort"
diff --git a/Library/Homebrew/cask/url.rb b/Library/Homebrew/cask/url.rb
index 723647ecf..92aaaf977 100644
--- a/Library/Homebrew/cask/url.rb
+++ b/Library/Homebrew/cask/url.rb
@@ -1,4 +1,4 @@
-# typed: strict
+# typed: true
 # frozen_string_literal: true
 
 # Class corresponding to the `url` stanza.
diff --git a/Library/Homebrew/cask/utils.rb b/Library/Homebrew/cask/utils.rb
index 8cee59760..47f804df2 100644
--- a/Library/Homebrew/cask/utils.rb
+++ b/Library/Homebrew/cask/utils.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/user"
diff --git a/Library/Homebrew/cask/verify.rb b/Library/Homebrew/cask/verify.rb
index f31d234c4..65f9998de 100644
--- a/Library/Homebrew/cask/verify.rb
+++ b/Library/Homebrew/cask/verify.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/cask_dependent.rb b/Library/Homebrew/cask_dependent.rb
index 96137a1a1..3f38a25fd 100644
--- a/Library/Homebrew/cask_dependent.rb
+++ b/Library/Homebrew/cask_dependent.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # An adapter for casks to provide dependency information in a formula-like interface
diff --git a/Library/Homebrew/caveats.rb b/Library/Homebrew/caveats.rb
index 01ad2bd27..18392648a 100644
--- a/Library/Homebrew/caveats.rb
+++ b/Library/Homebrew/caveats.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/python"
diff --git a/Library/Homebrew/checksum.rb b/Library/Homebrew/checksum.rb
index 84c6c6234..7a3219513 100644
--- a/Library/Homebrew/checksum.rb
+++ b/Library/Homebrew/checksum.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # A formula's checksum.
diff --git a/Library/Homebrew/cleaner.rb b/Library/Homebrew/cleaner.rb
index d35ef9b7d..9cf117c77 100644
--- a/Library/Homebrew/cleaner.rb
+++ b/Library/Homebrew/cleaner.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Cleans a newly installed keg.
diff --git a/Library/Homebrew/cleanup.rb b/Library/Homebrew/cleanup.rb
index bf0f424ae..9c53b9172 100644
--- a/Library/Homebrew/cleanup.rb
+++ b/Library/Homebrew/cleanup.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/bottles"
diff --git a/Library/Homebrew/cli/args.rb b/Library/Homebrew/cli/args.rb
index ab5d2579a..1a779dcbd 100644
--- a/Library/Homebrew/cli/args.rb
+++ b/Library/Homebrew/cli/args.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cli/named_args"
diff --git a/Library/Homebrew/cli/named_args.rb b/Library/Homebrew/cli/named_args.rb
index 362bd1f7c..dad9e9b22 100644
--- a/Library/Homebrew/cli/named_args.rb
+++ b/Library/Homebrew/cli/named_args.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "delegate"
diff --git a/Library/Homebrew/cli/parser.rb b/Library/Homebrew/cli/parser.rb
index 179c4c17a..913cfbc52 100644
--- a/Library/Homebrew/cli/parser.rb
+++ b/Library/Homebrew/cli/parser.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "env_config"
diff --git a/Library/Homebrew/cmd/--cache.rb b/Library/Homebrew/cmd/--cache.rb
index 240d145df..3a5270806 100644
--- a/Library/Homebrew/cmd/--cache.rb
+++ b/Library/Homebrew/cmd/--cache.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "fetch"
diff --git a/Library/Homebrew/cmd/--caskroom.rb b/Library/Homebrew/cmd/--caskroom.rb
index a0964ad7c..b53574fd0 100644
--- a/Library/Homebrew/cmd/--caskroom.rb
+++ b/Library/Homebrew/cmd/--caskroom.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/cmd/--cellar.rb b/Library/Homebrew/cmd/--cellar.rb
index e300df269..2af781142 100644
--- a/Library/Homebrew/cmd/--cellar.rb
+++ b/Library/Homebrew/cmd/--cellar.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/--env.rb b/Library/Homebrew/cmd/--env.rb
index f25dc0bb0..45b609ca5 100644
--- a/Library/Homebrew/cmd/--env.rb
+++ b/Library/Homebrew/cmd/--env.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/ENV"
diff --git a/Library/Homebrew/cmd/--prefix.rb b/Library/Homebrew/cmd/--prefix.rb
index 01fd584ad..b451a24f7 100644
--- a/Library/Homebrew/cmd/--prefix.rb
+++ b/Library/Homebrew/cmd/--prefix.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/--repository.rb b/Library/Homebrew/cmd/--repository.rb
index 211f1c0c2..042c39b36 100644
--- a/Library/Homebrew/cmd/--repository.rb
+++ b/Library/Homebrew/cmd/--repository.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/--version.rb b/Library/Homebrew/cmd/--version.rb
index 037a8cc75..93595a9a3 100644
--- a/Library/Homebrew/cmd/--version.rb
+++ b/Library/Homebrew/cmd/--version.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/analytics.rb b/Library/Homebrew/cmd/analytics.rb
index 4c8ef458f..957b175b8 100644
--- a/Library/Homebrew/cmd/analytics.rb
+++ b/Library/Homebrew/cmd/analytics.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/cask.rb b/Library/Homebrew/cmd/cask.rb
index 1a51405ec..cbd284fc2 100644
--- a/Library/Homebrew/cmd/cask.rb
+++ b/Library/Homebrew/cmd/cask.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cmd"
diff --git a/Library/Homebrew/cmd/cleanup.rb b/Library/Homebrew/cmd/cleanup.rb
index 66fe52034..c0294392d 100644
--- a/Library/Homebrew/cmd/cleanup.rb
+++ b/Library/Homebrew/cmd/cleanup.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cleanup"
diff --git a/Library/Homebrew/cmd/commands.rb b/Library/Homebrew/cmd/commands.rb
index 29fd68755..cbcb36a49 100644
--- a/Library/Homebrew/cmd/commands.rb
+++ b/Library/Homebrew/cmd/commands.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/config.rb b/Library/Homebrew/cmd/config.rb
index d0519bf4a..562d9a9f1 100644
--- a/Library/Homebrew/cmd/config.rb
+++ b/Library/Homebrew/cmd/config.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "system_config"
diff --git a/Library/Homebrew/cmd/deps.rb b/Library/Homebrew/cmd/deps.rb
index 2a9994200..a5f8ade23 100644
--- a/Library/Homebrew/cmd/deps.rb
+++ b/Library/Homebrew/cmd/deps.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/desc.rb b/Library/Homebrew/cmd/desc.rb
index 5c1e143d2..e9616f174 100644
--- a/Library/Homebrew/cmd/desc.rb
+++ b/Library/Homebrew/cmd/desc.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "descriptions"
diff --git a/Library/Homebrew/cmd/doctor.rb b/Library/Homebrew/cmd/doctor.rb
index 43eb385c2..5d10f9f65 100644
--- a/Library/Homebrew/cmd/doctor.rb
+++ b/Library/Homebrew/cmd/doctor.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "diagnostic"
diff --git a/Library/Homebrew/cmd/fetch.rb b/Library/Homebrew/cmd/fetch.rb
index 6d306af2b..9baa5cec4 100644
--- a/Library/Homebrew/cmd/fetch.rb
+++ b/Library/Homebrew/cmd/fetch.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/gist-logs.rb b/Library/Homebrew/cmd/gist-logs.rb
index b40b299af..0947d4303 100644
--- a/Library/Homebrew/cmd/gist-logs.rb
+++ b/Library/Homebrew/cmd/gist-logs.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/help.rb b/Library/Homebrew/cmd/help.rb
index acd6849ca..bcad2600c 100644
--- a/Library/Homebrew/cmd/help.rb
+++ b/Library/Homebrew/cmd/help.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "help"
diff --git a/Library/Homebrew/cmd/home.rb b/Library/Homebrew/cmd/home.rb
index 8d3f2d7b7..2c147bb6d 100644
--- a/Library/Homebrew/cmd/home.rb
+++ b/Library/Homebrew/cmd/home.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/info.rb b/Library/Homebrew/cmd/info.rb
index 0807ee16b..d715e89a5 100644
--- a/Library/Homebrew/cmd/info.rb
+++ b/Library/Homebrew/cmd/info.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "missing_formula"
diff --git a/Library/Homebrew/cmd/install.rb b/Library/Homebrew/cmd/install.rb
index 2b6224061..576c780dc 100644
--- a/Library/Homebrew/cmd/install.rb
+++ b/Library/Homebrew/cmd/install.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/config"
diff --git a/Library/Homebrew/cmd/leaves.rb b/Library/Homebrew/cmd/leaves.rb
index 1768227b7..d84468f5f 100644
--- a/Library/Homebrew/cmd/leaves.rb
+++ b/Library/Homebrew/cmd/leaves.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/link.rb b/Library/Homebrew/cmd/link.rb
index 2ec520a89..ad48c1779 100644
--- a/Library/Homebrew/cmd/link.rb
+++ b/Library/Homebrew/cmd/link.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "ostruct"
diff --git a/Library/Homebrew/cmd/list.rb b/Library/Homebrew/cmd/list.rb
index 3e55a8833..40f5875f9 100644
--- a/Library/Homebrew/cmd/list.rb
+++ b/Library/Homebrew/cmd/list.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "metafiles"
diff --git a/Library/Homebrew/cmd/log.rb b/Library/Homebrew/cmd/log.rb
index 347467641..f2d8b1c4e 100644
--- a/Library/Homebrew/cmd/log.rb
+++ b/Library/Homebrew/cmd/log.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/migrate.rb b/Library/Homebrew/cmd/migrate.rb
index df28df344..f400036c7 100644
--- a/Library/Homebrew/cmd/migrate.rb
+++ b/Library/Homebrew/cmd/migrate.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "migrator"
diff --git a/Library/Homebrew/cmd/missing.rb b/Library/Homebrew/cmd/missing.rb
index 73909a422..434522758 100644
--- a/Library/Homebrew/cmd/missing.rb
+++ b/Library/Homebrew/cmd/missing.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/options.rb b/Library/Homebrew/cmd/options.rb
index 4c796ecd7..6ecc3c7fc 100644
--- a/Library/Homebrew/cmd/options.rb
+++ b/Library/Homebrew/cmd/options.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/outdated.rb b/Library/Homebrew/cmd/outdated.rb
index e6f148d8f..d5c5458ad 100644
--- a/Library/Homebrew/cmd/outdated.rb
+++ b/Library/Homebrew/cmd/outdated.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/pin.rb b/Library/Homebrew/cmd/pin.rb
index 5fab77254..0ca4458d9 100644
--- a/Library/Homebrew/cmd/pin.rb
+++ b/Library/Homebrew/cmd/pin.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/postinstall.rb b/Library/Homebrew/cmd/postinstall.rb
index 7b0a7220c..1b4885a36 100644
--- a/Library/Homebrew/cmd/postinstall.rb
+++ b/Library/Homebrew/cmd/postinstall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "sandbox"
diff --git a/Library/Homebrew/cmd/readall.rb b/Library/Homebrew/cmd/readall.rb
index a4f1d47a5..5bfa66054 100644
--- a/Library/Homebrew/cmd/readall.rb
+++ b/Library/Homebrew/cmd/readall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "readall"
diff --git a/Library/Homebrew/cmd/reinstall.rb b/Library/Homebrew/cmd/reinstall.rb
index 1c9d62a08..93e4c1293 100644
--- a/Library/Homebrew/cmd/reinstall.rb
+++ b/Library/Homebrew/cmd/reinstall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula_installer"
diff --git a/Library/Homebrew/cmd/search.rb b/Library/Homebrew/cmd/search.rb
index 2464cd1f4..1bd005c8e 100644
--- a/Library/Homebrew/cmd/search.rb
+++ b/Library/Homebrew/cmd/search.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/switch.rb b/Library/Homebrew/cmd/switch.rb
index 33a15d1c1..94389f2b8 100644
--- a/Library/Homebrew/cmd/switch.rb
+++ b/Library/Homebrew/cmd/switch.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/tap-info.rb b/Library/Homebrew/cmd/tap-info.rb
index 56a099d12..6c01e4172 100644
--- a/Library/Homebrew/cmd/tap-info.rb
+++ b/Library/Homebrew/cmd/tap-info.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/tap.rb b/Library/Homebrew/cmd/tap.rb
index 0e2d0cbca..df6f428ff 100644
--- a/Library/Homebrew/cmd/tap.rb
+++ b/Library/Homebrew/cmd/tap.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/uninstall.rb b/Library/Homebrew/cmd/uninstall.rb
index 2cfe6c600..41a0117c6 100644
--- a/Library/Homebrew/cmd/uninstall.rb
+++ b/Library/Homebrew/cmd/uninstall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "keg"
diff --git a/Library/Homebrew/cmd/unlink.rb b/Library/Homebrew/cmd/unlink.rb
index b72716482..080bcd163 100644
--- a/Library/Homebrew/cmd/unlink.rb
+++ b/Library/Homebrew/cmd/unlink.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "ostruct"
diff --git a/Library/Homebrew/cmd/unpin.rb b/Library/Homebrew/cmd/unpin.rb
index 8a56ebb6c..77bf7b157 100644
--- a/Library/Homebrew/cmd/unpin.rb
+++ b/Library/Homebrew/cmd/unpin.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/cmd/untap.rb b/Library/Homebrew/cmd/untap.rb
index 5209dd26c..b8f6a9301 100644
--- a/Library/Homebrew/cmd/untap.rb
+++ b/Library/Homebrew/cmd/untap.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/update-report.rb b/Library/Homebrew/cmd/update-report.rb
index a140e10b2..e0a5877b9 100644
--- a/Library/Homebrew/cmd/update-report.rb
+++ b/Library/Homebrew/cmd/update-report.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula_versions"
diff --git a/Library/Homebrew/cmd/upgrade.rb b/Library/Homebrew/cmd/upgrade.rb
index a8fb5fb68..c2ece9f42 100644
--- a/Library/Homebrew/cmd/upgrade.rb
+++ b/Library/Homebrew/cmd/upgrade.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/cmd/uses.rb b/Library/Homebrew/cmd/uses.rb
index b63dc064b..8b2f91243 100644
--- a/Library/Homebrew/cmd/uses.rb
+++ b/Library/Homebrew/cmd/uses.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # `brew uses foo bar` returns formulae that use both foo and bar
diff --git a/Library/Homebrew/commands.rb b/Library/Homebrew/commands.rb
index 4654d4e58..bdfe4a339 100644
--- a/Library/Homebrew/commands.rb
+++ b/Library/Homebrew/commands.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cmd"
diff --git a/Library/Homebrew/compat.rb b/Library/Homebrew/compat.rb
index d14810694..04870d0a2 100644
--- a/Library/Homebrew/compat.rb
+++ b/Library/Homebrew/compat.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "compat/dependencies_helpers"
diff --git a/Library/Homebrew/compat/cli/parser.rb b/Library/Homebrew/compat/cli/parser.rb
index ee9e3964a..c1678d159 100644
--- a/Library/Homebrew/compat/cli/parser.rb
+++ b/Library/Homebrew/compat/cli/parser.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/compat/dependencies_helpers.rb b/Library/Homebrew/compat/dependencies_helpers.rb
index 5bb5461c0..21122e4c3 100644
--- a/Library/Homebrew/compat/dependencies_helpers.rb
+++ b/Library/Homebrew/compat/dependencies_helpers.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/compat/extend/nil.rb b/Library/Homebrew/compat/extend/nil.rb
index 0e5bb0289..5e521a436 100644
--- a/Library/Homebrew/compat/extend/nil.rb
+++ b/Library/Homebrew/compat/extend/nil.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class NilClass
diff --git a/Library/Homebrew/compat/extend/string.rb b/Library/Homebrew/compat/extend/string.rb
index a786035a8..bdbed5611 100644
--- a/Library/Homebrew/compat/extend/string.rb
+++ b/Library/Homebrew/compat/extend/string.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class String
diff --git a/Library/Homebrew/compat/formula.rb b/Library/Homebrew/compat/formula.rb
index 82a0faa8a..0f08e86d9 100644
--- a/Library/Homebrew/compat/formula.rb
+++ b/Library/Homebrew/compat/formula.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Formula
diff --git a/Library/Homebrew/compat/language/haskell.rb b/Library/Homebrew/compat/language/haskell.rb
index b03fb503e..3619e88c0 100644
--- a/Library/Homebrew/compat/language/haskell.rb
+++ b/Library/Homebrew/compat/language/haskell.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/compat/language/java.rb b/Library/Homebrew/compat/language/java.rb
index ba6b77fb0..4a23f7a6c 100644
--- a/Library/Homebrew/compat/language/java.rb
+++ b/Library/Homebrew/compat/language/java.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/compat/language/python.rb b/Library/Homebrew/compat/language/python.rb
index 8afd2cdcb..abb4673f6 100644
--- a/Library/Homebrew/compat/language/python.rb
+++ b/Library/Homebrew/compat/language/python.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/compat/os/mac.rb b/Library/Homebrew/compat/os/mac.rb
index 275d69b30..ab64aeac9 100644
--- a/Library/Homebrew/compat/os/mac.rb
+++ b/Library/Homebrew/compat/os/mac.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module OS
diff --git a/Library/Homebrew/compilers.rb b/Library/Homebrew/compilers.rb
index ca19f896f..50ffe8979 100644
--- a/Library/Homebrew/compilers.rb
+++ b/Library/Homebrew/compilers.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # @private
diff --git a/Library/Homebrew/config.rb b/Library/Homebrew/config.rb
index 6cbc3709e..feecc8373 100644
--- a/Library/Homebrew/config.rb
+++ b/Library/Homebrew/config.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 raise "HOMEBREW_BREW_FILE was not exported! Please call bin/brew directly!" unless ENV["HOMEBREW_BREW_FILE"]
diff --git a/Library/Homebrew/context.rb b/Library/Homebrew/context.rb
index 46407ed5b..60c354af1 100644
--- a/Library/Homebrew/context.rb
+++ b/Library/Homebrew/context.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "monitor"
diff --git a/Library/Homebrew/cxxstdlib.rb b/Library/Homebrew/cxxstdlib.rb
index e2754c51b..fad219e56 100644
--- a/Library/Homebrew/cxxstdlib.rb
+++ b/Library/Homebrew/cxxstdlib.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "compilers"
diff --git a/Library/Homebrew/debrew.rb b/Library/Homebrew/debrew.rb
index 6382cbca0..54a5b9af0 100644
--- a/Library/Homebrew/debrew.rb
+++ b/Library/Homebrew/debrew.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "mutex_m"
diff --git a/Library/Homebrew/debrew/irb.rb b/Library/Homebrew/debrew/irb.rb
index b88aa44c7..6c2d285c1 100644
--- a/Library/Homebrew/debrew/irb.rb
+++ b/Library/Homebrew/debrew/irb.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "irb"
diff --git a/Library/Homebrew/dependable.rb b/Library/Homebrew/dependable.rb
index 89dfe083c..3d036f41d 100644
--- a/Library/Homebrew/dependable.rb
+++ b/Library/Homebrew/dependable.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "options"
diff --git a/Library/Homebrew/dependencies.rb b/Library/Homebrew/dependencies.rb
index 07d79190d..2764048ce 100644
--- a/Library/Homebrew/dependencies.rb
+++ b/Library/Homebrew/dependencies.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "delegate"
diff --git a/Library/Homebrew/dependencies_helpers.rb b/Library/Homebrew/dependencies_helpers.rb
index 998cef14a..98507958d 100644
--- a/Library/Homebrew/dependencies_helpers.rb
+++ b/Library/Homebrew/dependencies_helpers.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask_dependent"
diff --git a/Library/Homebrew/dependency.rb b/Library/Homebrew/dependency.rb
index 29a2284c7..c98d46b0e 100644
--- a/Library/Homebrew/dependency.rb
+++ b/Library/Homebrew/dependency.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependable"
diff --git a/Library/Homebrew/dependency_collector.rb b/Library/Homebrew/dependency_collector.rb
index 7420c2003..80b8dbab0 100644
--- a/Library/Homebrew/dependency_collector.rb
+++ b/Library/Homebrew/dependency_collector.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "dependency"
diff --git a/Library/Homebrew/deprecate_disable.rb b/Library/Homebrew/deprecate_disable.rb
index 3423f90e3..a1239e0aa 100644
--- a/Library/Homebrew/deprecate_disable.rb
+++ b/Library/Homebrew/deprecate_disable.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Helper module for handling disable! and deprecate!
diff --git a/Library/Homebrew/description_cache_store.rb b/Library/Homebrew/description_cache_store.rb
index c90523abc..4e2d3e7e2 100644
--- a/Library/Homebrew/description_cache_store.rb
+++ b/Library/Homebrew/description_cache_store.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "set"
diff --git a/Library/Homebrew/descriptions.rb b/Library/Homebrew/descriptions.rb
index 6ba21bed4..8f980de1c 100644
--- a/Library/Homebrew/descriptions.rb
+++ b/Library/Homebrew/descriptions.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/audit.rb b/Library/Homebrew/dev-cmd/audit.rb
index c6c7b47af..3f72f021c 100644
--- a/Library/Homebrew/dev-cmd/audit.rb
+++ b/Library/Homebrew/dev-cmd/audit.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/bottle.rb b/Library/Homebrew/dev-cmd/bottle.rb
index fb282e5f8..e9b9e4b15 100644
--- a/Library/Homebrew/dev-cmd/bottle.rb
+++ b/Library/Homebrew/dev-cmd/bottle.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/bump-cask-pr.rb b/Library/Homebrew/dev-cmd/bump-cask-pr.rb
index 6c9fd09ce..a9ecedc58 100644
--- a/Library/Homebrew/dev-cmd/bump-cask-pr.rb
+++ b/Library/Homebrew/dev-cmd/bump-cask-pr.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask"
diff --git a/Library/Homebrew/dev-cmd/bump-formula-pr.rb b/Library/Homebrew/dev-cmd/bump-formula-pr.rb
index e005a7e4c..dc4bb5a06 100644
--- a/Library/Homebrew/dev-cmd/bump-formula-pr.rb
+++ b/Library/Homebrew/dev-cmd/bump-formula-pr.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/bump-revision.rb b/Library/Homebrew/dev-cmd/bump-revision.rb
index d66585b96..aa53caaf4 100644
--- a/Library/Homebrew/dev-cmd/bump-revision.rb
+++ b/Library/Homebrew/dev-cmd/bump-revision.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/bump.rb b/Library/Homebrew/dev-cmd/bump.rb
index 3df802b35..543d75186 100644
--- a/Library/Homebrew/dev-cmd/bump.rb
+++ b/Library/Homebrew/dev-cmd/bump.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/cat.rb b/Library/Homebrew/dev-cmd/cat.rb
index 4d7ef44a9..3415e03e6 100644
--- a/Library/Homebrew/dev-cmd/cat.rb
+++ b/Library/Homebrew/dev-cmd/cat.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/command.rb b/Library/Homebrew/dev-cmd/command.rb
index cb928bc57..7c2f6e37c 100644
--- a/Library/Homebrew/dev-cmd/command.rb
+++ b/Library/Homebrew/dev-cmd/command.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "commands"
diff --git a/Library/Homebrew/dev-cmd/create.rb b/Library/Homebrew/dev-cmd/create.rb
index 85b2f857e..1d45047ef 100644
--- a/Library/Homebrew/dev-cmd/create.rb
+++ b/Library/Homebrew/dev-cmd/create.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/diy.rb b/Library/Homebrew/dev-cmd/diy.rb
index f58ae2fa9..6018ae1e6 100644
--- a/Library/Homebrew/dev-cmd/diy.rb
+++ b/Library/Homebrew/dev-cmd/diy.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/edit.rb b/Library/Homebrew/dev-cmd/edit.rb
index 698a131ba..9929ce153 100644
--- a/Library/Homebrew/dev-cmd/edit.rb
+++ b/Library/Homebrew/dev-cmd/edit.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/extract.rb b/Library/Homebrew/dev-cmd/extract.rb
index f10ede111..f64973e17 100644
--- a/Library/Homebrew/dev-cmd/extract.rb
+++ b/Library/Homebrew/dev-cmd/extract.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/formula.rb b/Library/Homebrew/dev-cmd/formula.rb
index ef18d8501..b5e7ccaec 100644
--- a/Library/Homebrew/dev-cmd/formula.rb
+++ b/Library/Homebrew/dev-cmd/formula.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/install-bundler-gems.rb b/Library/Homebrew/dev-cmd/install-bundler-gems.rb
index 20ba27eb7..b15b49ee9 100644
--- a/Library/Homebrew/dev-cmd/install-bundler-gems.rb
+++ b/Library/Homebrew/dev-cmd/install-bundler-gems.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/irb.rb b/Library/Homebrew/dev-cmd/irb.rb
index fb91ecc63..c5a0a29b8 100644
--- a/Library/Homebrew/dev-cmd/irb.rb
+++ b/Library/Homebrew/dev-cmd/irb.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/linkage.rb b/Library/Homebrew/dev-cmd/linkage.rb
index e090e413b..631e9ec65 100644
--- a/Library/Homebrew/dev-cmd/linkage.rb
+++ b/Library/Homebrew/dev-cmd/linkage.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cache_store"
diff --git a/Library/Homebrew/dev-cmd/livecheck.rb b/Library/Homebrew/dev-cmd/livecheck.rb
index 89fe49ea2..d17776802 100644
--- a/Library/Homebrew/dev-cmd/livecheck.rb
+++ b/Library/Homebrew/dev-cmd/livecheck.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/man.rb b/Library/Homebrew/dev-cmd/man.rb
index cea445b3d..0a17cdc96 100644
--- a/Library/Homebrew/dev-cmd/man.rb
+++ b/Library/Homebrew/dev-cmd/man.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/dev-cmd/mirror.rb b/Library/Homebrew/dev-cmd/mirror.rb
index c8dfa5df5..7790c32fe 100644
--- a/Library/Homebrew/dev-cmd/mirror.rb
+++ b/Library/Homebrew/dev-cmd/mirror.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "bintray"
diff --git a/Library/Homebrew/dev-cmd/pr-automerge.rb b/Library/Homebrew/dev-cmd/pr-automerge.rb
index 78c4097a1..40c4007f8 100644
--- a/Library/Homebrew/dev-cmd/pr-automerge.rb
+++ b/Library/Homebrew/dev-cmd/pr-automerge.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/pr-publish.rb b/Library/Homebrew/dev-cmd/pr-publish.rb
index 55d32abf5..86b675293 100644
--- a/Library/Homebrew/dev-cmd/pr-publish.rb
+++ b/Library/Homebrew/dev-cmd/pr-publish.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/pr-pull.rb b/Library/Homebrew/dev-cmd/pr-pull.rb
index 3effc9eaa..0c4c0d721 100644
--- a/Library/Homebrew/dev-cmd/pr-pull.rb
+++ b/Library/Homebrew/dev-cmd/pr-pull.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "download_strategy"
diff --git a/Library/Homebrew/dev-cmd/pr-upload.rb b/Library/Homebrew/dev-cmd/pr-upload.rb
index 67186565c..566b4e020 100644
--- a/Library/Homebrew/dev-cmd/pr-upload.rb
+++ b/Library/Homebrew/dev-cmd/pr-upload.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/prof.rb b/Library/Homebrew/dev-cmd/prof.rb
index 3abb9b9ab..2c40d0b7f 100644
--- a/Library/Homebrew/dev-cmd/prof.rb
+++ b/Library/Homebrew/dev-cmd/prof.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/pull.rb b/Library/Homebrew/dev-cmd/pull.rb
index 045e1c241..ce279b1f8 100644
--- a/Library/Homebrew/dev-cmd/pull.rb
+++ b/Library/Homebrew/dev-cmd/pull.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "net/http"
diff --git a/Library/Homebrew/dev-cmd/release-notes.rb b/Library/Homebrew/dev-cmd/release-notes.rb
index 76266028c..7288d85e1 100644
--- a/Library/Homebrew/dev-cmd/release-notes.rb
+++ b/Library/Homebrew/dev-cmd/release-notes.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/ruby.rb b/Library/Homebrew/dev-cmd/ruby.rb
index 13477d5f6..4e4f014d0 100644
--- a/Library/Homebrew/dev-cmd/ruby.rb
+++ b/Library/Homebrew/dev-cmd/ruby.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/sh.rb b/Library/Homebrew/dev-cmd/sh.rb
index 3cfb76948..a1f35adc1 100644
--- a/Library/Homebrew/dev-cmd/sh.rb
+++ b/Library/Homebrew/dev-cmd/sh.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/ENV"
diff --git a/Library/Homebrew/dev-cmd/sponsors.rb b/Library/Homebrew/dev-cmd/sponsors.rb
index 568daa945..0e3bece7d 100644
--- a/Library/Homebrew/dev-cmd/sponsors.rb
+++ b/Library/Homebrew/dev-cmd/sponsors.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/style.rb b/Library/Homebrew/dev-cmd/style.rb
index 26da075aa..8b3d5439a 100644
--- a/Library/Homebrew/dev-cmd/style.rb
+++ b/Library/Homebrew/dev-cmd/style.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "json"
diff --git a/Library/Homebrew/dev-cmd/tap-new.rb b/Library/Homebrew/dev-cmd/tap-new.rb
index 16e46f278..7b587570b 100644
--- a/Library/Homebrew/dev-cmd/tap-new.rb
+++ b/Library/Homebrew/dev-cmd/tap-new.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "tap"
diff --git a/Library/Homebrew/dev-cmd/test.rb b/Library/Homebrew/dev-cmd/test.rb
index 50c052723..087f5f551 100644
--- a/Library/Homebrew/dev-cmd/test.rb
+++ b/Library/Homebrew/dev-cmd/test.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/ENV"
diff --git a/Library/Homebrew/dev-cmd/tests.rb b/Library/Homebrew/dev-cmd/tests.rb
index 7512cabb8..428177807 100644
--- a/Library/Homebrew/dev-cmd/tests.rb
+++ b/Library/Homebrew/dev-cmd/tests.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/typecheck.rb b/Library/Homebrew/dev-cmd/typecheck.rb
index 98825c669..b4af45936 100644
--- a/Library/Homebrew/dev-cmd/typecheck.rb
+++ b/Library/Homebrew/dev-cmd/typecheck.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/unpack.rb b/Library/Homebrew/dev-cmd/unpack.rb
index e4b5dcc48..e88b9ef2c 100644
--- a/Library/Homebrew/dev-cmd/unpack.rb
+++ b/Library/Homebrew/dev-cmd/unpack.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "stringio"
diff --git a/Library/Homebrew/dev-cmd/update-license-data.rb b/Library/Homebrew/dev-cmd/update-license-data.rb
index f22b83623..6d11bca35 100644
--- a/Library/Homebrew/dev-cmd/update-license-data.rb
+++ b/Library/Homebrew/dev-cmd/update-license-data.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/update-python-resources.rb b/Library/Homebrew/dev-cmd/update-python-resources.rb
index c5ce307a6..e109887bb 100644
--- a/Library/Homebrew/dev-cmd/update-python-resources.rb
+++ b/Library/Homebrew/dev-cmd/update-python-resources.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/update-test.rb b/Library/Homebrew/dev-cmd/update-test.rb
index d05f445ea..c2c6b0f60 100644
--- a/Library/Homebrew/dev-cmd/update-test.rb
+++ b/Library/Homebrew/dev-cmd/update-test.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/dev-cmd/vendor-gems.rb b/Library/Homebrew/dev-cmd/vendor-gems.rb
index d702e7df6..c336427a4 100644
--- a/Library/Homebrew/dev-cmd/vendor-gems.rb
+++ b/Library/Homebrew/dev-cmd/vendor-gems.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/development_tools.rb b/Library/Homebrew/development_tools.rb
index b64c7b931..c0e0c3396 100644
--- a/Library/Homebrew/development_tools.rb
+++ b/Library/Homebrew/development_tools.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # @private
diff --git a/Library/Homebrew/diagnostic.rb b/Library/Homebrew/diagnostic.rb
index 2b9f16698..4e48e0887 100644
--- a/Library/Homebrew/diagnostic.rb
+++ b/Library/Homebrew/diagnostic.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "keg"
diff --git a/Library/Homebrew/download_strategy.rb b/Library/Homebrew/download_strategy.rb
index 064c42224..35950630b 100644
--- a/Library/Homebrew/download_strategy.rb
+++ b/Library/Homebrew/download_strategy.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "json"
diff --git a/Library/Homebrew/env_config.rb b/Library/Homebrew/env_config.rb
index 747906d20..278cd0f3e 100644
--- a/Library/Homebrew/env_config.rb
+++ b/Library/Homebrew/env_config.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/exceptions.rb b/Library/Homebrew/exceptions.rb
index 35913baf0..56c3b1587 100644
--- a/Library/Homebrew/exceptions.rb
+++ b/Library/Homebrew/exceptions.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "shellwords"
diff --git a/Library/Homebrew/extend/ENV.rb b/Library/Homebrew/extend/ENV.rb
index 9d0835167..17a6fd122 100644
--- a/Library/Homebrew/extend/ENV.rb
+++ b/Library/Homebrew/extend/ENV.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "hardware"
diff --git a/Library/Homebrew/extend/ENV/shared.rb b/Library/Homebrew/extend/ENV/shared.rb
index e2367a0c1..6ce7864e6 100644
--- a/Library/Homebrew/extend/ENV/shared.rb
+++ b/Library/Homebrew/extend/ENV/shared.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "compilers"
diff --git a/Library/Homebrew/extend/ENV/std.rb b/Library/Homebrew/extend/ENV/std.rb
index 8afbc1397..30dfaeef2 100644
--- a/Library/Homebrew/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/ENV/std.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "hardware"
diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index 4bbe7e054..b30a714bf 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/ENV/shared"
diff --git a/Library/Homebrew/extend/cachable.rb b/Library/Homebrew/extend/cachable.rb
index 754509648..c90e9ca47 100644
--- a/Library/Homebrew/extend/cachable.rb
+++ b/Library/Homebrew/extend/cachable.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Cachable
diff --git a/Library/Homebrew/extend/git_repository.rb b/Library/Homebrew/extend/git_repository.rb
index 495b538bf..56a8ced86 100644
--- a/Library/Homebrew/extend/git_repository.rb
+++ b/Library/Homebrew/extend/git_repository.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/git"
diff --git a/Library/Homebrew/extend/hash_validator.rb b/Library/Homebrew/extend/hash_validator.rb
index ff6d7aec5..09cfbe68a 100644
--- a/Library/Homebrew/extend/hash_validator.rb
+++ b/Library/Homebrew/extend/hash_validator.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module HashValidator
diff --git a/Library/Homebrew/extend/io.rb b/Library/Homebrew/extend/io.rb
index 21080e1fe..f5d36dfc8 100644
--- a/Library/Homebrew/extend/io.rb
+++ b/Library/Homebrew/extend/io.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 class IO
diff --git a/Library/Homebrew/extend/module.rb b/Library/Homebrew/extend/module.rb
index 5ba8ae7e0..173bfcc38 100644
--- a/Library/Homebrew/extend/module.rb
+++ b/Library/Homebrew/extend/module.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 class Module
diff --git a/Library/Homebrew/extend/optparse.rb b/Library/Homebrew/extend/optparse.rb
index d59dcbeca..fb52d3705 100644
--- a/Library/Homebrew/extend/optparse.rb
+++ b/Library/Homebrew/extend/optparse.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "optparse"
diff --git a/Library/Homebrew/extend/os/bottles.rb b/Library/Homebrew/extend/os/bottles.rb
index b9426c9d5..653fc2d19 100644
--- a/Library/Homebrew/extend/os/bottles.rb
+++ b/Library/Homebrew/extend/os/bottles.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/utils/bottles" if OS.mac?
diff --git a/Library/Homebrew/extend/os/caveats.rb b/Library/Homebrew/extend/os/caveats.rb
index 6dddc2a8f..75bd37fed 100644
--- a/Library/Homebrew/extend/os/caveats.rb
+++ b/Library/Homebrew/extend/os/caveats.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/caveats" if OS.mac?
diff --git a/Library/Homebrew/extend/os/cleaner.rb b/Library/Homebrew/extend/os/cleaner.rb
index 0fc9822e7..2e318d7d5 100644
--- a/Library/Homebrew/extend/os/cleaner.rb
+++ b/Library/Homebrew/extend/os/cleaner.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/dependency_collector.rb b/Library/Homebrew/extend/os/dependency_collector.rb
index b73abbdcf..58a3f2399 100644
--- a/Library/Homebrew/extend/os/dependency_collector.rb
+++ b/Library/Homebrew/extend/os/dependency_collector.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/development_tools.rb b/Library/Homebrew/extend/os/development_tools.rb
index 61385fc5c..58e4f580b 100644
--- a/Library/Homebrew/extend/os/development_tools.rb
+++ b/Library/Homebrew/extend/os/development_tools.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/diagnostic.rb b/Library/Homebrew/extend/os/diagnostic.rb
index d94fb033b..066e48505 100644
--- a/Library/Homebrew/extend/os/diagnostic.rb
+++ b/Library/Homebrew/extend/os/diagnostic.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/extend/ENV/shared.rb b/Library/Homebrew/extend/os/extend/ENV/shared.rb
index ee2c60f12..1109fad7a 100644
--- a/Library/Homebrew/extend/os/extend/ENV/shared.rb
+++ b/Library/Homebrew/extend/os/extend/ENV/shared.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/extend/ENV/std.rb b/Library/Homebrew/extend/os/extend/ENV/std.rb
index 4fa49e135..8e2b4e3e5 100644
--- a/Library/Homebrew/extend/os/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/os/extend/ENV/std.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/extend/ENV/super.rb b/Library/Homebrew/extend/os/extend/ENV/super.rb
index e7d197638..e5349464e 100644
--- a/Library/Homebrew/extend/os/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/os/extend/ENV/super.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/formula.rb b/Library/Homebrew/extend/os/formula.rb
index fe06aea8c..5a520cf8a 100644
--- a/Library/Homebrew/extend/os/formula.rb
+++ b/Library/Homebrew/extend/os/formula.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/formula_cellar_checks.rb b/Library/Homebrew/extend/os/formula_cellar_checks.rb
index 85bf7f77b..35cac0c90 100644
--- a/Library/Homebrew/extend/os/formula_cellar_checks.rb
+++ b/Library/Homebrew/extend/os/formula_cellar_checks.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/formula_support.rb b/Library/Homebrew/extend/os/formula_support.rb
index b092c72bc..ebefc4b5f 100644
--- a/Library/Homebrew/extend/os/formula_support.rb
+++ b/Library/Homebrew/extend/os/formula_support.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/formula_support" if OS.mac?
diff --git a/Library/Homebrew/extend/os/hardware.rb b/Library/Homebrew/extend/os/hardware.rb
index f23d41e4a..07a3382eb 100644
--- a/Library/Homebrew/extend/os/hardware.rb
+++ b/Library/Homebrew/extend/os/hardware.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/install.rb b/Library/Homebrew/extend/os/install.rb
index 8e93626db..0bb64629d 100644
--- a/Library/Homebrew/extend/os/install.rb
+++ b/Library/Homebrew/extend/os/install.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/linux/install" if OS.linux?
diff --git a/Library/Homebrew/extend/os/keg.rb b/Library/Homebrew/extend/os/keg.rb
index 7b321b1b9..5e3cdd073 100644
--- a/Library/Homebrew/extend/os/keg.rb
+++ b/Library/Homebrew/extend/os/keg.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/keg" if OS.mac?
diff --git a/Library/Homebrew/extend/os/keg_relocate.rb b/Library/Homebrew/extend/os/keg_relocate.rb
index 2107c8388..6330de538 100644
--- a/Library/Homebrew/extend/os/keg_relocate.rb
+++ b/Library/Homebrew/extend/os/keg_relocate.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/language/java.rb b/Library/Homebrew/extend/os/language/java.rb
index 03e20040e..3c1c0372b 100644
--- a/Library/Homebrew/extend/os/language/java.rb
+++ b/Library/Homebrew/extend/os/language/java.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/language/java" if OS.mac?
diff --git a/Library/Homebrew/extend/os/linkage_checker.rb b/Library/Homebrew/extend/os/linkage_checker.rb
index 4fe4204f6..3e8904e5e 100644
--- a/Library/Homebrew/extend/os/linkage_checker.rb
+++ b/Library/Homebrew/extend/os/linkage_checker.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/linux/linkage_checker" if OS.linux?
diff --git a/Library/Homebrew/extend/os/linux/cleaner.rb b/Library/Homebrew/extend/os/linux/cleaner.rb
index 21d646c0b..230e2a8ca 100644
--- a/Library/Homebrew/extend/os/linux/cleaner.rb
+++ b/Library/Homebrew/extend/os/linux/cleaner.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 class Cleaner
diff --git a/Library/Homebrew/extend/os/linux/dependency_collector.rb b/Library/Homebrew/extend/os/linux/dependency_collector.rb
index cfad51c4c..c019b67f0 100644
--- a/Library/Homebrew/extend/os/linux/dependency_collector.rb
+++ b/Library/Homebrew/extend/os/linux/dependency_collector.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class DependencyCollector
diff --git a/Library/Homebrew/extend/os/linux/development_tools.rb b/Library/Homebrew/extend/os/linux/development_tools.rb
index 590c0e0d7..4e3bc56c9 100644
--- a/Library/Homebrew/extend/os/linux/development_tools.rb
+++ b/Library/Homebrew/extend/os/linux/development_tools.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class DevelopmentTools
diff --git a/Library/Homebrew/extend/os/linux/diagnostic.rb b/Library/Homebrew/extend/os/linux/diagnostic.rb
index 355e7e8cd..30c48e55d 100644
--- a/Library/Homebrew/extend/os/linux/diagnostic.rb
+++ b/Library/Homebrew/extend/os/linux/diagnostic.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "tempfile"
diff --git a/Library/Homebrew/extend/os/linux/extend/ENV/shared.rb b/Library/Homebrew/extend/os/linux/extend/ENV/shared.rb
index b16178cac..661725a6d 100644
--- a/Library/Homebrew/extend/os/linux/extend/ENV/shared.rb
+++ b/Library/Homebrew/extend/os/linux/extend/ENV/shared.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module SharedEnvExtension
diff --git a/Library/Homebrew/extend/os/linux/extend/ENV/std.rb b/Library/Homebrew/extend/os/linux/extend/ENV/std.rb
index ddef1ee7e..fb287efc3 100644
--- a/Library/Homebrew/extend/os/linux/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/os/linux/extend/ENV/std.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Stdenv
diff --git a/Library/Homebrew/extend/os/linux/extend/ENV/super.rb b/Library/Homebrew/extend/os/linux/extend/ENV/super.rb
index b5ba7e450..a3fda016e 100644
--- a/Library/Homebrew/extend/os/linux/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/os/linux/extend/ENV/super.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Superenv
diff --git a/Library/Homebrew/extend/os/linux/extend/pathname.rb b/Library/Homebrew/extend/os/linux/extend/pathname.rb
index 7b4bd6371..c3bca7f31 100644
--- a/Library/Homebrew/extend/os/linux/extend/pathname.rb
+++ b/Library/Homebrew/extend/os/linux/extend/pathname.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "os/linux/elf"
diff --git a/Library/Homebrew/extend/os/linux/formula.rb b/Library/Homebrew/extend/os/linux/formula.rb
index e1562909a..6b96d548c 100644
--- a/Library/Homebrew/extend/os/linux/formula.rb
+++ b/Library/Homebrew/extend/os/linux/formula.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Formula
diff --git a/Library/Homebrew/extend/os/linux/formula_cellar_checks.rb b/Library/Homebrew/extend/os/linux/formula_cellar_checks.rb
index 00a14f98b..fa2e49945 100644
--- a/Library/Homebrew/extend/os/linux/formula_cellar_checks.rb
+++ b/Library/Homebrew/extend/os/linux/formula_cellar_checks.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 module FormulaCellarChecks
diff --git a/Library/Homebrew/extend/os/linux/hardware/cpu.rb b/Library/Homebrew/extend/os/linux/hardware/cpu.rb
index e51d65628..badc19f50 100644
--- a/Library/Homebrew/extend/os/linux/hardware/cpu.rb
+++ b/Library/Homebrew/extend/os/linux/hardware/cpu.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Hardware
diff --git a/Library/Homebrew/extend/os/linux/install.rb b/Library/Homebrew/extend/os/linux/install.rb
index 2184287f5..a905cbca7 100644
--- a/Library/Homebrew/extend/os/linux/install.rb
+++ b/Library/Homebrew/extend/os/linux/install.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/extend/os/linux/keg_relocate.rb b/Library/Homebrew/extend/os/linux/keg_relocate.rb
index 5d25692fd..b4307b71d 100644
--- a/Library/Homebrew/extend/os/linux/keg_relocate.rb
+++ b/Library/Homebrew/extend/os/linux/keg_relocate.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Keg
diff --git a/Library/Homebrew/extend/os/linux/linkage_checker.rb b/Library/Homebrew/extend/os/linux/linkage_checker.rb
index 30e073513..7720cc0d2 100644
--- a/Library/Homebrew/extend/os/linux/linkage_checker.rb
+++ b/Library/Homebrew/extend/os/linux/linkage_checker.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class LinkageChecker
diff --git a/Library/Homebrew/extend/os/linux/readall.rb b/Library/Homebrew/extend/os/linux/readall.rb
index e9278821e..62c235325 100644
--- a/Library/Homebrew/extend/os/linux/readall.rb
+++ b/Library/Homebrew/extend/os/linux/readall.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 module Readall
diff --git a/Library/Homebrew/extend/os/linux/requirements/java_requirement.rb b/Library/Homebrew/extend/os/linux/requirements/java_requirement.rb
index 1b1b6347c..aa643d9ff 100644
--- a/Library/Homebrew/extend/os/linux/requirements/java_requirement.rb
+++ b/Library/Homebrew/extend/os/linux/requirements/java_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/java"
diff --git a/Library/Homebrew/extend/os/linux/requirements/osxfuse_requirement.rb b/Library/Homebrew/extend/os/linux/requirements/osxfuse_requirement.rb
index 518a7ce64..1a2ed8127 100644
--- a/Library/Homebrew/extend/os/linux/requirements/osxfuse_requirement.rb
+++ b/Library/Homebrew/extend/os/linux/requirements/osxfuse_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/extend/os/linux/resource.rb b/Library/Homebrew/extend/os/linux/resource.rb
index a5af426c0..47f3801dd 100644
--- a/Library/Homebrew/extend/os/linux/resource.rb
+++ b/Library/Homebrew/extend/os/linux/resource.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Resource
diff --git a/Library/Homebrew/extend/os/linux/software_spec.rb b/Library/Homebrew/extend/os/linux/software_spec.rb
index 12ed0de45..7d118fdc3 100644
--- a/Library/Homebrew/extend/os/linux/software_spec.rb
+++ b/Library/Homebrew/extend/os/linux/software_spec.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 class BottleSpecification
diff --git a/Library/Homebrew/extend/os/linux/system_config.rb b/Library/Homebrew/extend/os/linux/system_config.rb
index 0f76a99d2..154c805a1 100644
--- a/Library/Homebrew/extend/os/linux/system_config.rb
+++ b/Library/Homebrew/extend/os/linux/system_config.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/extend/os/linux/tap.rb b/Library/Homebrew/extend/os/linux/tap.rb
index 4a3ab9709..9f214a40b 100644
--- a/Library/Homebrew/extend/os/linux/tap.rb
+++ b/Library/Homebrew/extend/os/linux/tap.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class CoreTap < Tap
diff --git a/Library/Homebrew/extend/os/linux/utils/analytics.rb b/Library/Homebrew/extend/os/linux/utils/analytics.rb
index 00058e64d..b4aa28f00 100644
--- a/Library/Homebrew/extend/os/linux/utils/analytics.rb
+++ b/Library/Homebrew/extend/os/linux/utils/analytics.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/extend/os/mac/caveats.rb b/Library/Homebrew/extend/os/mac/caveats.rb
index dae8d90b0..6de89386a 100644
--- a/Library/Homebrew/extend/os/mac/caveats.rb
+++ b/Library/Homebrew/extend/os/mac/caveats.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Caveats
diff --git a/Library/Homebrew/extend/os/mac/cleaner.rb b/Library/Homebrew/extend/os/mac/cleaner.rb
index 35b6e374c..9f2425ca2 100644
--- a/Library/Homebrew/extend/os/mac/cleaner.rb
+++ b/Library/Homebrew/extend/os/mac/cleaner.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Cleaner
diff --git a/Library/Homebrew/extend/os/mac/dependency_collector.rb b/Library/Homebrew/extend/os/mac/dependency_collector.rb
index 5db3b5767..5efcd96d8 100644
--- a/Library/Homebrew/extend/os/mac/dependency_collector.rb
+++ b/Library/Homebrew/extend/os/mac/dependency_collector.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class DependencyCollector
diff --git a/Library/Homebrew/extend/os/mac/development_tools.rb b/Library/Homebrew/extend/os/mac/development_tools.rb
index 787196472..15ea337b2 100644
--- a/Library/Homebrew/extend/os/mac/development_tools.rb
+++ b/Library/Homebrew/extend/os/mac/development_tools.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "os/mac/xcode"
diff --git a/Library/Homebrew/extend/os/mac/diagnostic.rb b/Library/Homebrew/extend/os/mac/diagnostic.rb
index de7222f90..7b05358af 100644
--- a/Library/Homebrew/extend/os/mac/diagnostic.rb
+++ b/Library/Homebrew/extend/os/mac/diagnostic.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb b/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb
index 476d30f75..633768d80 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/shared.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module SharedEnvExtension
diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/std.rb b/Library/Homebrew/extend/os/mac/extend/ENV/std.rb
index e6829a57a..eceb48671 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/std.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Stdenv
diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
index 6bc4edcc4..999c916b7 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Superenv
diff --git a/Library/Homebrew/extend/os/mac/extend/pathname.rb b/Library/Homebrew/extend/os/mac/extend/pathname.rb
index 9289aa73b..b208bf5b6 100644
--- a/Library/Homebrew/extend/os/mac/extend/pathname.rb
+++ b/Library/Homebrew/extend/os/mac/extend/pathname.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "os/mac/mach"
diff --git a/Library/Homebrew/extend/os/mac/formula.rb b/Library/Homebrew/extend/os/mac/formula.rb
index dba823599..b9fbaf824 100644
--- a/Library/Homebrew/extend/os/mac/formula.rb
+++ b/Library/Homebrew/extend/os/mac/formula.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Formula
diff --git a/Library/Homebrew/extend/os/mac/formula_cellar_checks.rb b/Library/Homebrew/extend/os/mac/formula_cellar_checks.rb
index 60c964940..1bb8f462e 100644
--- a/Library/Homebrew/extend/os/mac/formula_cellar_checks.rb
+++ b/Library/Homebrew/extend/os/mac/formula_cellar_checks.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cache_store"
diff --git a/Library/Homebrew/extend/os/mac/formula_support.rb b/Library/Homebrew/extend/os/mac/formula_support.rb
index 0635fce91..a70d6f3bc 100644
--- a/Library/Homebrew/extend/os/mac/formula_support.rb
+++ b/Library/Homebrew/extend/os/mac/formula_support.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 class KegOnlyReason
diff --git a/Library/Homebrew/extend/os/mac/hardware.rb b/Library/Homebrew/extend/os/mac/hardware.rb
index c1edebfa6..ab53b4fd4 100644
--- a/Library/Homebrew/extend/os/mac/hardware.rb
+++ b/Library/Homebrew/extend/os/mac/hardware.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 module Hardware
diff --git a/Library/Homebrew/extend/os/mac/hardware/cpu.rb b/Library/Homebrew/extend/os/mac/hardware/cpu.rb
index 308e94ea0..0038423b3 100644
--- a/Library/Homebrew/extend/os/mac/hardware/cpu.rb
+++ b/Library/Homebrew/extend/os/mac/hardware/cpu.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "macho"
diff --git a/Library/Homebrew/extend/os/mac/keg.rb b/Library/Homebrew/extend/os/mac/keg.rb
index 5fb0fbe0e..504b5c134 100644
--- a/Library/Homebrew/extend/os/mac/keg.rb
+++ b/Library/Homebrew/extend/os/mac/keg.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Keg
diff --git a/Library/Homebrew/extend/os/mac/keg_relocate.rb b/Library/Homebrew/extend/os/mac/keg_relocate.rb
index d9a88c658..b55deed22 100644
--- a/Library/Homebrew/extend/os/mac/keg_relocate.rb
+++ b/Library/Homebrew/extend/os/mac/keg_relocate.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Keg
diff --git a/Library/Homebrew/extend/os/mac/language/java.rb b/Library/Homebrew/extend/os/mac/language/java.rb
index a92b386ec..0096bb9c9 100644
--- a/Library/Homebrew/extend/os/mac/language/java.rb
+++ b/Library/Homebrew/extend/os/mac/language/java.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/extend/os/mac/missing_formula.rb b/Library/Homebrew/extend/os/mac/missing_formula.rb
index cceda9155..cd9ce8232 100644
--- a/Library/Homebrew/extend/os/mac/missing_formula.rb
+++ b/Library/Homebrew/extend/os/mac/missing_formula.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "cask/cmd/abstract_command"
diff --git a/Library/Homebrew/extend/os/mac/requirements/java_requirement.rb b/Library/Homebrew/extend/os/mac/requirements/java_requirement.rb
index f8130f758..4390f5067 100644
--- a/Library/Homebrew/extend/os/mac/requirements/java_requirement.rb
+++ b/Library/Homebrew/extend/os/mac/requirements/java_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 class JavaRequirement < Requirement
diff --git a/Library/Homebrew/extend/os/mac/requirements/osxfuse_requirement.rb b/Library/Homebrew/extend/os/mac/requirements/osxfuse_requirement.rb
index bcdfabdf7..bdf2d9e93 100644
--- a/Library/Homebrew/extend/os/mac/requirements/osxfuse_requirement.rb
+++ b/Library/Homebrew/extend/os/mac/requirements/osxfuse_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb b/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb
index 5c0f5cb9c..647c485b7 100644
--- a/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb
+++ b/Library/Homebrew/extend/os/mac/requirements/x11_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/extend/os/mac/resource.rb b/Library/Homebrew/extend/os/mac/resource.rb
index 2c5321856..2947a85a3 100644
--- a/Library/Homebrew/extend/os/mac/resource.rb
+++ b/Library/Homebrew/extend/os/mac/resource.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Resource
diff --git a/Library/Homebrew/extend/os/mac/search.rb b/Library/Homebrew/extend/os/mac/search.rb
index 82cf08b5c..f25e05c43 100644
--- a/Library/Homebrew/extend/os/mac/search.rb
+++ b/Library/Homebrew/extend/os/mac/search.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cask"
diff --git a/Library/Homebrew/extend/os/mac/software_spec.rb b/Library/Homebrew/extend/os/mac/software_spec.rb
index e3c1de519..221c0c4ca 100644
--- a/Library/Homebrew/extend/os/mac/software_spec.rb
+++ b/Library/Homebrew/extend/os/mac/software_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 class SoftwareSpec
diff --git a/Library/Homebrew/extend/os/mac/system_config.rb b/Library/Homebrew/extend/os/mac/system_config.rb
index da6698fc5..3ea619e2d 100644
--- a/Library/Homebrew/extend/os/mac/system_config.rb
+++ b/Library/Homebrew/extend/os/mac/system_config.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module SystemConfig
diff --git a/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb b/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb
index fa619816d..d90cdb21f 100644
--- a/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb
+++ b/Library/Homebrew/extend/os/mac/unpack_strategy/zip.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/extend/os/mac/utils/analytics.rb b/Library/Homebrew/extend/os/mac/utils/analytics.rb
index 3e624df8a..ceba5b264 100644
--- a/Library/Homebrew/extend/os/mac/utils/analytics.rb
+++ b/Library/Homebrew/extend/os/mac/utils/analytics.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/extend/os/mac/utils/bottles.rb b/Library/Homebrew/extend/os/mac/utils/bottles.rb
index 1b9303918..3986d0b94 100644
--- a/Library/Homebrew/extend/os/mac/utils/bottles.rb
+++ b/Library/Homebrew/extend/os/mac/utils/bottles.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/extend/os/missing_formula.rb b/Library/Homebrew/extend/os/missing_formula.rb
index b77e64274..4eb794a1b 100644
--- a/Library/Homebrew/extend/os/missing_formula.rb
+++ b/Library/Homebrew/extend/os/missing_formula.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/missing_formula" if OS.mac?
diff --git a/Library/Homebrew/extend/os/pathname.rb b/Library/Homebrew/extend/os/pathname.rb
index 58e109e3f..131f49e6a 100644
--- a/Library/Homebrew/extend/os/pathname.rb
+++ b/Library/Homebrew/extend/os/pathname.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/readall.rb b/Library/Homebrew/extend/os/readall.rb
index 6ddbc3e6d..af407f1c4 100644
--- a/Library/Homebrew/extend/os/readall.rb
+++ b/Library/Homebrew/extend/os/readall.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/linux/readall" if OS.linux?
diff --git a/Library/Homebrew/extend/os/requirements/java_requirement.rb b/Library/Homebrew/extend/os/requirements/java_requirement.rb
index 85c36f1ae..cd6faa271 100644
--- a/Library/Homebrew/extend/os/requirements/java_requirement.rb
+++ b/Library/Homebrew/extend/os/requirements/java_requirement.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/requirements/osxfuse_requirement.rb b/Library/Homebrew/extend/os/requirements/osxfuse_requirement.rb
index eab9176f3..318299549 100644
--- a/Library/Homebrew/extend/os/requirements/osxfuse_requirement.rb
+++ b/Library/Homebrew/extend/os/requirements/osxfuse_requirement.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/requirements/x11_requirement.rb b/Library/Homebrew/extend/os/requirements/x11_requirement.rb
index 5389f38a1..df7ae3481 100644
--- a/Library/Homebrew/extend/os/requirements/x11_requirement.rb
+++ b/Library/Homebrew/extend/os/requirements/x11_requirement.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/requirements/x11_requirement" if OS.mac?
diff --git a/Library/Homebrew/extend/os/resource.rb b/Library/Homebrew/extend/os/resource.rb
index 9ad337890..aa6d67515 100644
--- a/Library/Homebrew/extend/os/resource.rb
+++ b/Library/Homebrew/extend/os/resource.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/search.rb b/Library/Homebrew/extend/os/search.rb
index c6909a0fa..96e7ff28e 100644
--- a/Library/Homebrew/extend/os/search.rb
+++ b/Library/Homebrew/extend/os/search.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/mac/search" if OS.mac?
diff --git a/Library/Homebrew/extend/os/software_spec.rb b/Library/Homebrew/extend/os/software_spec.rb
index b4aea1144..15da2d0e5 100644
--- a/Library/Homebrew/extend/os/software_spec.rb
+++ b/Library/Homebrew/extend/os/software_spec.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.linux?
diff --git a/Library/Homebrew/extend/os/system_config.rb b/Library/Homebrew/extend/os/system_config.rb
index 9c06e9a02..71298e98e 100644
--- a/Library/Homebrew/extend/os/system_config.rb
+++ b/Library/Homebrew/extend/os/system_config.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 if OS.mac?
diff --git a/Library/Homebrew/extend/os/tap.rb b/Library/Homebrew/extend/os/tap.rb
index 82e0a09f6..7ad0ad531 100644
--- a/Library/Homebrew/extend/os/tap.rb
+++ b/Library/Homebrew/extend/os/tap.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/linux/tap" if OS.linux?
diff --git a/Library/Homebrew/extend/os/utils/analytics.rb b/Library/Homebrew/extend/os/utils/analytics.rb
index 8598bbf46..f0042d78c 100644
--- a/Library/Homebrew/extend/os/utils/analytics.rb
+++ b/Library/Homebrew/extend/os/utils/analytics.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "extend/os/linux/utils/analytics" if OS.linux?
diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index fb3ddd965..9d45d5f5e 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "resource"
diff --git a/Library/Homebrew/extend/predicable.rb b/Library/Homebrew/extend/predicable.rb
index dba7f17b5..914244d5d 100644
--- a/Library/Homebrew/extend/predicable.rb
+++ b/Library/Homebrew/extend/predicable.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Predicable
diff --git a/Library/Homebrew/extend/string.rb b/Library/Homebrew/extend/string.rb
index 32d403e21..d68d67897 100644
--- a/Library/Homebrew/extend/string.rb
+++ b/Library/Homebrew/extend/string.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "active_support/core_ext/object/blank"
diff --git a/Library/Homebrew/fetch.rb b/Library/Homebrew/fetch.rb
index 717537cbc..6297b5d62 100644
--- a/Library/Homebrew/fetch.rb
+++ b/Library/Homebrew/fetch.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 135310476..53ec1ee33 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cache_store"
diff --git a/Library/Homebrew/formula_assertions.rb b/Library/Homebrew/formula_assertions.rb
index fdcfa8657..05948f3a2 100644
--- a/Library/Homebrew/formula_assertions.rb
+++ b/Library/Homebrew/formula_assertions.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/formula_cellar_checks.rb b/Library/Homebrew/formula_cellar_checks.rb
index 7c71590d2..7d7a31b17 100644
--- a/Library/Homebrew/formula_cellar_checks.rb
+++ b/Library/Homebrew/formula_cellar_checks.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/shell"
diff --git a/Library/Homebrew/formula_creator.rb b/Library/Homebrew/formula_creator.rb
index 75ddba148..f30b7082f 100644
--- a/Library/Homebrew/formula_creator.rb
+++ b/Library/Homebrew/formula_creator.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "digest"
diff --git a/Library/Homebrew/formula_free_port.rb b/Library/Homebrew/formula_free_port.rb
index 2067ca287..91e94da60 100644
--- a/Library/Homebrew/formula_free_port.rb
+++ b/Library/Homebrew/formula_free_port.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "socket"
diff --git a/Library/Homebrew/formula_info.rb b/Library/Homebrew/formula_info.rb
index 916564394..367f7e694 100644
--- a/Library/Homebrew/formula_info.rb
+++ b/Library/Homebrew/formula_info.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Formula information drawn from an external `brew info --json` call.
diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index b6c38e128..1ff0ab171 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cxxstdlib"
diff --git a/Library/Homebrew/formula_pin.rb b/Library/Homebrew/formula_pin.rb
index 613a51fc8..0a0d097c2 100644
--- a/Library/Homebrew/formula_pin.rb
+++ b/Library/Homebrew/formula_pin.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "keg"
diff --git a/Library/Homebrew/formula_support.rb b/Library/Homebrew/formula_support.rb
index 521621711..67569587f 100644
--- a/Library/Homebrew/formula_support.rb
+++ b/Library/Homebrew/formula_support.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Used to track formulae that cannot be installed at the same time.
diff --git a/Library/Homebrew/formula_versions.rb b/Library/Homebrew/formula_versions.rb
index ecd67d527..c33726de0 100644
--- a/Library/Homebrew/formula_versions.rb
+++ b/Library/Homebrew/formula_versions.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/formulary.rb b/Library/Homebrew/formulary.rb
index 4bc1e446c..2421b1d1b 100644
--- a/Library/Homebrew/formulary.rb
+++ b/Library/Homebrew/formulary.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "digest/md5"
diff --git a/Library/Homebrew/global.rb b/Library/Homebrew/global.rb
index ac124aa09..667f76543 100644
--- a/Library/Homebrew/global.rb
+++ b/Library/Homebrew/global.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "English"
diff --git a/Library/Homebrew/hardware.rb b/Library/Homebrew/hardware.rb
index ea63270b2..05b5d08ad 100644
--- a/Library/Homebrew/hardware.rb
+++ b/Library/Homebrew/hardware.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "utils/popen"
diff --git a/Library/Homebrew/help.rb b/Library/Homebrew/help.rb
index 8b577b8c8..66e38c357 100644
--- a/Library/Homebrew/help.rb
+++ b/Library/Homebrew/help.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/install.rb b/Library/Homebrew/install.rb
index 17d406957..f00d3fc40 100644
--- a/Library/Homebrew/install.rb
+++ b/Library/Homebrew/install.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "diagnostic"
diff --git a/Library/Homebrew/install_renamed.rb b/Library/Homebrew/install_renamed.rb
index ac891273a..6018da810 100644
--- a/Library/Homebrew/install_renamed.rb
+++ b/Library/Homebrew/install_renamed.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Helper module for installing default files.
diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index 8c8140190..902ed12f3 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "keg_relocate"
diff --git a/Library/Homebrew/keg_relocate.rb b/Library/Homebrew/keg_relocate.rb
index 1bdf422dc..b26b5a770 100644
--- a/Library/Homebrew/keg_relocate.rb
+++ b/Library/Homebrew/keg_relocate.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 class Keg
diff --git a/Library/Homebrew/language/go.rb b/Library/Homebrew/language/go.rb
index 2b4a0399d..22f851472 100644
--- a/Library/Homebrew/language/go.rb
+++ b/Library/Homebrew/language/go.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "resource"
diff --git a/Library/Homebrew/language/haskell.rb b/Library/Homebrew/language/haskell.rb
index 964fa4f77..ad959e7e7 100644
--- a/Library/Homebrew/language/haskell.rb
+++ b/Library/Homebrew/language/haskell.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "compat/language/haskell"
diff --git a/Library/Homebrew/language/java.rb b/Library/Homebrew/language/java.rb
index fb9b7b011..a67d52b10 100644
--- a/Library/Homebrew/language/java.rb
+++ b/Library/Homebrew/language/java.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/language/node.rb b/Library/Homebrew/language/node.rb
index 4f53e485f..fe16e5a14 100644
--- a/Library/Homebrew/language/node.rb
+++ b/Library/Homebrew/language/node.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/language/perl.rb b/Library/Homebrew/language/perl.rb
index c81ef65c5..3714b7140 100644
--- a/Library/Homebrew/language/perl.rb
+++ b/Library/Homebrew/language/perl.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/language/python.rb b/Library/Homebrew/language/python.rb
index d24e7c4ba..8a82706e1 100644
--- a/Library/Homebrew/language/python.rb
+++ b/Library/Homebrew/language/python.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Language
diff --git a/Library/Homebrew/lazy_object.rb b/Library/Homebrew/lazy_object.rb
index 8ea44995e..ace7e5d9c 100644
--- a/Library/Homebrew/lazy_object.rb
+++ b/Library/Homebrew/lazy_object.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # An object which lazily evaluates its inner block only once a method is called on it.
diff --git a/Library/Homebrew/linkage_cache_store.rb b/Library/Homebrew/linkage_cache_store.rb
index 6ab77998e..90f2bccdb 100644
--- a/Library/Homebrew/linkage_cache_store.rb
+++ b/Library/Homebrew/linkage_cache_store.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "set"
diff --git a/Library/Homebrew/linkage_checker.rb b/Library/Homebrew/linkage_checker.rb
index 9948086f2..74bcc6b2a 100644
--- a/Library/Homebrew/linkage_checker.rb
+++ b/Library/Homebrew/linkage_checker.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "keg"
diff --git a/Library/Homebrew/livecheck.rb b/Library/Homebrew/livecheck.rb
index c72818dc3..df31c5f45 100644
--- a/Library/Homebrew/livecheck.rb
+++ b/Library/Homebrew/livecheck.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # The `Livecheck` class implements the DSL methods used in a formula's
diff --git a/Library/Homebrew/livecheck/livecheck.rb b/Library/Homebrew/livecheck/livecheck.rb
index d5410b25f..466dd95e0 100644
--- a/Library/Homebrew/livecheck/livecheck.rb
+++ b/Library/Homebrew/livecheck/livecheck.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy"
diff --git a/Library/Homebrew/livecheck/strategy.rb b/Library/Homebrew/livecheck/strategy.rb
index aa6d196ff..411136545 100644
--- a/Library/Homebrew/livecheck/strategy.rb
+++ b/Library/Homebrew/livecheck/strategy.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/apache.rb b/Library/Homebrew/livecheck/strategy/apache.rb
index 5e8cb9e12..52beb1686 100644
--- a/Library/Homebrew/livecheck/strategy/apache.rb
+++ b/Library/Homebrew/livecheck/strategy/apache.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/bitbucket.rb b/Library/Homebrew/livecheck/strategy/bitbucket.rb
index a696d2125..a1e29a544 100644
--- a/Library/Homebrew/livecheck/strategy/bitbucket.rb
+++ b/Library/Homebrew/livecheck/strategy/bitbucket.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/git.rb b/Library/Homebrew/livecheck/strategy/git.rb
index f93127af9..5a1e5edb1 100644
--- a/Library/Homebrew/livecheck/strategy/git.rb
+++ b/Library/Homebrew/livecheck/strategy/git.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/livecheck/strategy/gnome.rb b/Library/Homebrew/livecheck/strategy/gnome.rb
index 72a6c68ff..fa1e95230 100644
--- a/Library/Homebrew/livecheck/strategy/gnome.rb
+++ b/Library/Homebrew/livecheck/strategy/gnome.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/gnu.rb b/Library/Homebrew/livecheck/strategy/gnu.rb
index 396c7e25a..72dbe4777 100644
--- a/Library/Homebrew/livecheck/strategy/gnu.rb
+++ b/Library/Homebrew/livecheck/strategy/gnu.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/hackage.rb b/Library/Homebrew/livecheck/strategy/hackage.rb
index 4f0303fe6..2c2ecd69b 100644
--- a/Library/Homebrew/livecheck/strategy/hackage.rb
+++ b/Library/Homebrew/livecheck/strategy/hackage.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/launchpad.rb b/Library/Homebrew/livecheck/strategy/launchpad.rb
index b9253521b..c38d393f2 100644
--- a/Library/Homebrew/livecheck/strategy/launchpad.rb
+++ b/Library/Homebrew/livecheck/strategy/launchpad.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/npm.rb b/Library/Homebrew/livecheck/strategy/npm.rb
index 3f2520d57..3c661f155 100644
--- a/Library/Homebrew/livecheck/strategy/npm.rb
+++ b/Library/Homebrew/livecheck/strategy/npm.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/page_match.rb b/Library/Homebrew/livecheck/strategy/page_match.rb
index 3e9ddc85f..73c80beac 100644
--- a/Library/Homebrew/livecheck/strategy/page_match.rb
+++ b/Library/Homebrew/livecheck/strategy/page_match.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open-uri"
diff --git a/Library/Homebrew/livecheck/strategy/pypi.rb b/Library/Homebrew/livecheck/strategy/pypi.rb
index 4c10516ef..6fa15dbff 100644
--- a/Library/Homebrew/livecheck/strategy/pypi.rb
+++ b/Library/Homebrew/livecheck/strategy/pypi.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/sourceforge.rb b/Library/Homebrew/livecheck/strategy/sourceforge.rb
index 336d32ebf..88c40d5c2 100644
--- a/Library/Homebrew/livecheck/strategy/sourceforge.rb
+++ b/Library/Homebrew/livecheck/strategy/sourceforge.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/livecheck/strategy/xorg.rb b/Library/Homebrew/livecheck/strategy/xorg.rb
index f9de6660d..5517897b1 100644
--- a/Library/Homebrew/livecheck/strategy/xorg.rb
+++ b/Library/Homebrew/livecheck/strategy/xorg.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open-uri"
diff --git a/Library/Homebrew/load_path.rb b/Library/Homebrew/load_path.rb
index ea9f8a230..258265213 100644
--- a/Library/Homebrew/load_path.rb
+++ b/Library/Homebrew/load_path.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "pathname"
diff --git a/Library/Homebrew/locale.rb b/Library/Homebrew/locale.rb
index c858aa03b..278bb621d 100644
--- a/Library/Homebrew/locale.rb
+++ b/Library/Homebrew/locale.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Representation of a system locale.
diff --git a/Library/Homebrew/lock_file.rb b/Library/Homebrew/lock_file.rb
index 88f017a17..7bbabfa73 100644
--- a/Library/Homebrew/lock_file.rb
+++ b/Library/Homebrew/lock_file.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "fcntl"
diff --git a/Library/Homebrew/messages.rb b/Library/Homebrew/messages.rb
index 18187a844..bc8c64b50 100644
--- a/Library/Homebrew/messages.rb
+++ b/Library/Homebrew/messages.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # A Messages object collects messages that may need to be displayed together
diff --git a/Library/Homebrew/metafiles.rb b/Library/Homebrew/metafiles.rb
index ea2b525ee..5a244e645 100644
--- a/Library/Homebrew/metafiles.rb
+++ b/Library/Homebrew/metafiles.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Helper for checking if a file is considered a metadata file.
diff --git a/Library/Homebrew/migrator.rb b/Library/Homebrew/migrator.rb
index bdf05f93b..c60bf8261 100644
--- a/Library/Homebrew/migrator.rb
+++ b/Library/Homebrew/migrator.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "lock_file"
diff --git a/Library/Homebrew/missing_formula.rb b/Library/Homebrew/missing_formula.rb
index c69de457b..69c76c0ae 100644
--- a/Library/Homebrew/missing_formula.rb
+++ b/Library/Homebrew/missing_formula.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formulary"
diff --git a/Library/Homebrew/mktemp.rb b/Library/Homebrew/mktemp.rb
index 716c3d269..749b8a215 100644
--- a/Library/Homebrew/mktemp.rb
+++ b/Library/Homebrew/mktemp.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Performs `Formula#mktemp`'s functionality, and tracks the results.
diff --git a/Library/Homebrew/official_taps.rb b/Library/Homebrew/official_taps.rb
index b19ed5a7d..a518cb8db 100644
--- a/Library/Homebrew/official_taps.rb
+++ b/Library/Homebrew/official_taps.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 OFFICIAL_CASK_TAPS = %w[
diff --git a/Library/Homebrew/options.rb b/Library/Homebrew/options.rb
index b486d3dc2..9e4a229ed 100644
--- a/Library/Homebrew/options.rb
+++ b/Library/Homebrew/options.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # A formula option.
diff --git a/Library/Homebrew/os.rb b/Library/Homebrew/os.rb
index 4981f12b5..2c3199b81 100644
--- a/Library/Homebrew/os.rb
+++ b/Library/Homebrew/os.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Helper functions for querying operating system information.
diff --git a/Library/Homebrew/os/global.rb b/Library/Homebrew/os/global.rb
index 9d6250c23..bbf58536d 100644
--- a/Library/Homebrew/os/global.rb
+++ b/Library/Homebrew/os/global.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "os/linux/global" if OS.linux?
diff --git a/Library/Homebrew/os/linux.rb b/Library/Homebrew/os/linux.rb
index c8804764a..17d2fee34 100644
--- a/Library/Homebrew/os/linux.rb
+++ b/Library/Homebrew/os/linux.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module OS
diff --git a/Library/Homebrew/os/linux/elf.rb b/Library/Homebrew/os/linux/elf.rb
index c4d8dae4c..c38fed883 100644
--- a/Library/Homebrew/os/linux/elf.rb
+++ b/Library/Homebrew/os/linux/elf.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # {Pathname} extension for dealing with ELF files.
diff --git a/Library/Homebrew/os/linux/glibc.rb b/Library/Homebrew/os/linux/glibc.rb
index a42ee092d..49df817c3 100644
--- a/Library/Homebrew/os/linux/glibc.rb
+++ b/Library/Homebrew/os/linux/glibc.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module OS
diff --git a/Library/Homebrew/os/linux/global.rb b/Library/Homebrew/os/linux/global.rb
index f367a86db..df09e17ca 100644
--- a/Library/Homebrew/os/linux/global.rb
+++ b/Library/Homebrew/os/linux/global.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # enables experimental patchelf.rb write support.
diff --git a/Library/Homebrew/os/linux/kernel.rb b/Library/Homebrew/os/linux/kernel.rb
index 1c20ce5a1..fd535699b 100644
--- a/Library/Homebrew/os/linux/kernel.rb
+++ b/Library/Homebrew/os/linux/kernel.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module OS
diff --git a/Library/Homebrew/os/mac.rb b/Library/Homebrew/os/mac.rb
index 8e9d0d33f..2ed8d4528 100644
--- a/Library/Homebrew/os/mac.rb
+++ b/Library/Homebrew/os/mac.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "os/mac/version"
diff --git a/Library/Homebrew/os/mac/architecture_list.rb b/Library/Homebrew/os/mac/architecture_list.rb
index 8ade3fe0c..f7cca8d69 100644
--- a/Library/Homebrew/os/mac/architecture_list.rb
+++ b/Library/Homebrew/os/mac/architecture_list.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "hardware"
diff --git a/Library/Homebrew/os/mac/keg.rb b/Library/Homebrew/os/mac/keg.rb
index 0782226c0..b5805975c 100644
--- a/Library/Homebrew/os/mac/keg.rb
+++ b/Library/Homebrew/os/mac/keg.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Keg
diff --git a/Library/Homebrew/os/mac/mach.rb b/Library/Homebrew/os/mac/mach.rb
index aef816426..7a6a75c31 100644
--- a/Library/Homebrew/os/mac/mach.rb
+++ b/Library/Homebrew/os/mac/mach.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "macho"
diff --git a/Library/Homebrew/os/mac/sdk.rb b/Library/Homebrew/os/mac/sdk.rb
index ff30e3eaa..502e9adc3 100644
--- a/Library/Homebrew/os/mac/sdk.rb
+++ b/Library/Homebrew/os/mac/sdk.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "os/mac/version"
diff --git a/Library/Homebrew/os/mac/version.rb b/Library/Homebrew/os/mac/version.rb
index 3aadfb95d..c8a899cc4 100644
--- a/Library/Homebrew/os/mac/version.rb
+++ b/Library/Homebrew/os/mac/version.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "hardware"
diff --git a/Library/Homebrew/os/mac/xcode.rb b/Library/Homebrew/os/mac/xcode.rb
index 7d78b855d..e81979622 100644
--- a/Library/Homebrew/os/mac/xcode.rb
+++ b/Library/Homebrew/os/mac/xcode.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module OS
diff --git a/Library/Homebrew/os/mac/xquartz.rb b/Library/Homebrew/os/mac/xquartz.rb
index 98858392d..21bed2917 100644
--- a/Library/Homebrew/os/mac/xquartz.rb
+++ b/Library/Homebrew/os/mac/xquartz.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module OS
diff --git a/Library/Homebrew/patch.rb b/Library/Homebrew/patch.rb
index 0934b436f..61d00d6a0 100644
--- a/Library/Homebrew/patch.rb
+++ b/Library/Homebrew/patch.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "resource"
diff --git a/Library/Homebrew/pkg_version.rb b/Library/Homebrew/pkg_version.rb
index cd7482108..c8aa68b26 100644
--- a/Library/Homebrew/pkg_version.rb
+++ b/Library/Homebrew/pkg_version.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "version"
diff --git a/Library/Homebrew/postinstall.rb b/Library/Homebrew/postinstall.rb
index 5f85cfbb8..575a27eed 100644
--- a/Library/Homebrew/postinstall.rb
+++ b/Library/Homebrew/postinstall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 old_trap = trap("INT") { exit! 130 }
diff --git a/Library/Homebrew/readall.rb b/Library/Homebrew/readall.rb
index d1e0a007b..507576724 100644
--- a/Library/Homebrew/readall.rb
+++ b/Library/Homebrew/readall.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/reinstall.rb b/Library/Homebrew/reinstall.rb
index 1f746aa6e..b763cd03b 100644
--- a/Library/Homebrew/reinstall.rb
+++ b/Library/Homebrew/reinstall.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "formula_installer"
diff --git a/Library/Homebrew/requirement.rb b/Library/Homebrew/requirement.rb
index d4bb33011..a6d8545cb 100644
--- a/Library/Homebrew/requirement.rb
+++ b/Library/Homebrew/requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependable"
diff --git a/Library/Homebrew/requirements.rb b/Library/Homebrew/requirements.rb
index 4358f1f2b..6b7b8251f 100644
--- a/Library/Homebrew/requirements.rb
+++ b/Library/Homebrew/requirements.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/requirements/arch_requirement.rb b/Library/Homebrew/requirements/arch_requirement.rb
index dc9d81320..d4499ee06 100644
--- a/Library/Homebrew/requirements/arch_requirement.rb
+++ b/Library/Homebrew/requirements/arch_requirement.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/requirements/codesign_requirement.rb b/Library/Homebrew/requirements/codesign_requirement.rb
index dbec98dba..54fb9352a 100644
--- a/Library/Homebrew/requirements/codesign_requirement.rb
+++ b/Library/Homebrew/requirements/codesign_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # A requirement on a code-signing identity.
diff --git a/Library/Homebrew/requirements/java_requirement.rb b/Library/Homebrew/requirements/java_requirement.rb
index d6ba1a933..a519a2cdb 100644
--- a/Library/Homebrew/requirements/java_requirement.rb
+++ b/Library/Homebrew/requirements/java_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/java"
diff --git a/Library/Homebrew/requirements/linux_requirement.rb b/Library/Homebrew/requirements/linux_requirement.rb
index 04b644a39..a744caeab 100644
--- a/Library/Homebrew/requirements/linux_requirement.rb
+++ b/Library/Homebrew/requirements/linux_requirement.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # A requirement on Linux.
diff --git a/Library/Homebrew/requirements/macos_requirement.rb b/Library/Homebrew/requirements/macos_requirement.rb
index 6013a1a1b..b9d4fbc55 100644
--- a/Library/Homebrew/requirements/macos_requirement.rb
+++ b/Library/Homebrew/requirements/macos_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/requirements/osxfuse_requirement.rb b/Library/Homebrew/requirements/osxfuse_requirement.rb
index 8371568fa..9a4a0f527 100644
--- a/Library/Homebrew/requirements/osxfuse_requirement.rb
+++ b/Library/Homebrew/requirements/osxfuse_requirement.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/requirements/tuntap_requirement.rb b/Library/Homebrew/requirements/tuntap_requirement.rb
index 6f9cec4cf..40075a947 100644
--- a/Library/Homebrew/requirements/tuntap_requirement.rb
+++ b/Library/Homebrew/requirements/tuntap_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/requirements/x11_requirement.rb b/Library/Homebrew/requirements/x11_requirement.rb
index f34834c2f..4fe5c9853 100644
--- a/Library/Homebrew/requirements/x11_requirement.rb
+++ b/Library/Homebrew/requirements/x11_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/requirements/xcode_requirement.rb b/Library/Homebrew/requirements/xcode_requirement.rb
index 97e1dde8d..533b3e851 100644
--- a/Library/Homebrew/requirements/xcode_requirement.rb
+++ b/Library/Homebrew/requirements/xcode_requirement.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirement"
diff --git a/Library/Homebrew/resource.rb b/Library/Homebrew/resource.rb
index ba6ddb6eb..29655d120 100644
--- a/Library/Homebrew/resource.rb
+++ b/Library/Homebrew/resource.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "download_strategy"
diff --git a/Library/Homebrew/rubocops.rb b/Library/Homebrew/rubocops.rb
index b2b748bb0..e5c565143 100644
--- a/Library/Homebrew/rubocops.rb
+++ b/Library/Homebrew/rubocops.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require_relative "load_path"
diff --git a/Library/Homebrew/rubocops/cask/ast/cask_block.rb b/Library/Homebrew/rubocops/cask/ast/cask_block.rb
index 98e97c0c3..c05f10972 100644
--- a/Library/Homebrew/rubocops/cask/ast/cask_block.rb
+++ b/Library/Homebrew/rubocops/cask/ast/cask_block.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/cask/ast/cask_header.rb b/Library/Homebrew/rubocops/cask/ast/cask_header.rb
index 7646552ee..a869967a5 100644
--- a/Library/Homebrew/rubocops/cask/ast/cask_header.rb
+++ b/Library/Homebrew/rubocops/cask/ast/cask_header.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module RuboCop
diff --git a/Library/Homebrew/rubocops/cask/ast/stanza.rb b/Library/Homebrew/rubocops/cask/ast/stanza.rb
index 8a6b7a545..85f0de5cc 100644
--- a/Library/Homebrew/rubocops/cask/ast/stanza.rb
+++ b/Library/Homebrew/rubocops/cask/ast/stanza.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/cask/constants/stanza.rb b/Library/Homebrew/rubocops/cask/constants/stanza.rb
index f4de0f313..3b818ac90 100644
--- a/Library/Homebrew/rubocops/cask/constants/stanza.rb
+++ b/Library/Homebrew/rubocops/cask/constants/stanza.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module RuboCop
diff --git a/Library/Homebrew/rubocops/cask/desc.rb b/Library/Homebrew/rubocops/cask/desc.rb
index 90ceefab9..0e03da626 100644
--- a/Library/Homebrew/rubocops/cask/desc.rb
+++ b/Library/Homebrew/rubocops/cask/desc.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/cask/extend/node.rb b/Library/Homebrew/rubocops/cask/extend/node.rb
index 8e179e70d..e0102bd9d 100644
--- a/Library/Homebrew/rubocops/cask/extend/node.rb
+++ b/Library/Homebrew/rubocops/cask/extend/node.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module RuboCop
diff --git a/Library/Homebrew/rubocops/cask/extend/string.rb b/Library/Homebrew/rubocops/cask/extend/string.rb
index 73ac1a98b..6dcccff83 100644
--- a/Library/Homebrew/rubocops/cask/extend/string.rb
+++ b/Library/Homebrew/rubocops/cask/extend/string.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Utility method extensions for String
diff --git a/Library/Homebrew/rubocops/cask/homepage_matches_url.rb b/Library/Homebrew/rubocops/cask/homepage_matches_url.rb
index 7d80c6405..3c12c14ac 100644
--- a/Library/Homebrew/rubocops/cask/homepage_matches_url.rb
+++ b/Library/Homebrew/rubocops/cask/homepage_matches_url.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb b/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb
index 220acaca8..a3a18a9ca 100644
--- a/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb
+++ b/Library/Homebrew/rubocops/cask/homepage_url_trailing_slash.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/cask/mixin/cask_help.rb b/Library/Homebrew/rubocops/cask/mixin/cask_help.rb
index 9dc0800c9..aa2d6eab1 100644
--- a/Library/Homebrew/rubocops/cask/mixin/cask_help.rb
+++ b/Library/Homebrew/rubocops/cask/mixin/cask_help.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module RuboCop
diff --git a/Library/Homebrew/rubocops/cask/mixin/on_desc_stanza.rb b/Library/Homebrew/rubocops/cask/mixin/on_desc_stanza.rb
index 067b6c30e..759b899d6 100644
--- a/Library/Homebrew/rubocops/cask/mixin/on_desc_stanza.rb
+++ b/Library/Homebrew/rubocops/cask/mixin/on_desc_stanza.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module RuboCop
diff --git a/Library/Homebrew/rubocops/cask/mixin/on_homepage_stanza.rb b/Library/Homebrew/rubocops/cask/mixin/on_homepage_stanza.rb
index f76d258fa..97607aa56 100644
--- a/Library/Homebrew/rubocops/cask/mixin/on_homepage_stanza.rb
+++ b/Library/Homebrew/rubocops/cask/mixin/on_homepage_stanza.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module RuboCop
diff --git a/Library/Homebrew/rubocops/cask/no_dsl_version.rb b/Library/Homebrew/rubocops/cask/no_dsl_version.rb
index 6e21cd85f..2d2aca942 100644
--- a/Library/Homebrew/rubocops/cask/no_dsl_version.rb
+++ b/Library/Homebrew/rubocops/cask/no_dsl_version.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/cask/stanza_grouping.rb b/Library/Homebrew/rubocops/cask/stanza_grouping.rb
index b49101e63..93e5ba21e 100644
--- a/Library/Homebrew/rubocops/cask/stanza_grouping.rb
+++ b/Library/Homebrew/rubocops/cask/stanza_grouping.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/cask/stanza_order.rb b/Library/Homebrew/rubocops/cask/stanza_order.rb
index 41b818df6..be6af752f 100644
--- a/Library/Homebrew/rubocops/cask/stanza_order.rb
+++ b/Library/Homebrew/rubocops/cask/stanza_order.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "forwardable"
diff --git a/Library/Homebrew/rubocops/caveats.rb b/Library/Homebrew/rubocops/caveats.rb
index f81c4fc26..577f49ac7 100644
--- a/Library/Homebrew/rubocops/caveats.rb
+++ b/Library/Homebrew/rubocops/caveats.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/checksum.rb b/Library/Homebrew/rubocops/checksum.rb
index fda9de60d..35edda879 100644
--- a/Library/Homebrew/rubocops/checksum.rb
+++ b/Library/Homebrew/rubocops/checksum.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/class.rb b/Library/Homebrew/rubocops/class.rb
index 56ce23cff..d44e75967 100644
--- a/Library/Homebrew/rubocops/class.rb
+++ b/Library/Homebrew/rubocops/class.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/components_order.rb b/Library/Homebrew/rubocops/components_order.rb
index d939a8ea3..41b35478f 100644
--- a/Library/Homebrew/rubocops/components_order.rb
+++ b/Library/Homebrew/rubocops/components_order.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/components_redundancy.rb b/Library/Homebrew/rubocops/components_redundancy.rb
index 1e51ef083..767306c75 100644
--- a/Library/Homebrew/rubocops/components_redundancy.rb
+++ b/Library/Homebrew/rubocops/components_redundancy.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/conflicts.rb b/Library/Homebrew/rubocops/conflicts.rb
index 318a79d47..f11a9a870 100644
--- a/Library/Homebrew/rubocops/conflicts.rb
+++ b/Library/Homebrew/rubocops/conflicts.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/dependency_order.rb b/Library/Homebrew/rubocops/dependency_order.rb
index 7f24d8087..fb77e88d5 100644
--- a/Library/Homebrew/rubocops/dependency_order.rb
+++ b/Library/Homebrew/rubocops/dependency_order.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/deprecate_disable.rb b/Library/Homebrew/rubocops/deprecate_disable.rb
index 79f21dcfb..f077a2b37 100644
--- a/Library/Homebrew/rubocops/deprecate_disable.rb
+++ b/Library/Homebrew/rubocops/deprecate_disable.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/extend/formula.rb b/Library/Homebrew/rubocops/extend/formula.rb
index eddbac5b6..f0675de94 100644
--- a/Library/Homebrew/rubocops/extend/formula.rb
+++ b/Library/Homebrew/rubocops/extend/formula.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Silence compatibility warning.
diff --git a/Library/Homebrew/rubocops/files.rb b/Library/Homebrew/rubocops/files.rb
index d4454ad4c..7ee1de87d 100644
--- a/Library/Homebrew/rubocops/files.rb
+++ b/Library/Homebrew/rubocops/files.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/formula_desc.rb b/Library/Homebrew/rubocops/formula_desc.rb
index 57e5066e1..f839e5571 100644
--- a/Library/Homebrew/rubocops/formula_desc.rb
+++ b/Library/Homebrew/rubocops/formula_desc.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/homepage.rb b/Library/Homebrew/rubocops/homepage.rb
index 0ea79d8e4..d1e3b06d1 100644
--- a/Library/Homebrew/rubocops/homepage.rb
+++ b/Library/Homebrew/rubocops/homepage.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/keg_only.rb b/Library/Homebrew/rubocops/keg_only.rb
index 6a578b5f7..3b811f07b 100644
--- a/Library/Homebrew/rubocops/keg_only.rb
+++ b/Library/Homebrew/rubocops/keg_only.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/lines.rb b/Library/Homebrew/rubocops/lines.rb
index 9f7dfe437..9cb7dc7a1 100644
--- a/Library/Homebrew/rubocops/lines.rb
+++ b/Library/Homebrew/rubocops/lines.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/livecheck.rb b/Library/Homebrew/rubocops/livecheck.rb
index 3bf74d1c8..c7f21adb2 100644
--- a/Library/Homebrew/rubocops/livecheck.rb
+++ b/Library/Homebrew/rubocops/livecheck.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/options.rb b/Library/Homebrew/rubocops/options.rb
index 907a98c18..f971548bd 100644
--- a/Library/Homebrew/rubocops/options.rb
+++ b/Library/Homebrew/rubocops/options.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/patches.rb b/Library/Homebrew/rubocops/patches.rb
index 03c9aa8d1..6ed4157c5 100644
--- a/Library/Homebrew/rubocops/patches.rb
+++ b/Library/Homebrew/rubocops/patches.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/rubocop-cask.rb b/Library/Homebrew/rubocops/rubocop-cask.rb
index 646e48399..fbba19daf 100644
--- a/Library/Homebrew/rubocops/rubocop-cask.rb
+++ b/Library/Homebrew/rubocops/rubocop-cask.rb
@@ -1,3 +1,4 @@
+# typed: strict
 # frozen_string_literal: true
 
 require "rubocop"
diff --git a/Library/Homebrew/rubocops/shared/desc_helper.rb b/Library/Homebrew/rubocops/shared/desc_helper.rb
index 22113414d..a3beae3e7 100644
--- a/Library/Homebrew/rubocops/shared/desc_helper.rb
+++ b/Library/Homebrew/rubocops/shared/desc_helper.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/shared/helper_functions"
diff --git a/Library/Homebrew/rubocops/shared/helper_functions.rb b/Library/Homebrew/rubocops/shared/helper_functions.rb
index 8b7388f94..5fc65ced9 100644
--- a/Library/Homebrew/rubocops/shared/helper_functions.rb
+++ b/Library/Homebrew/rubocops/shared/helper_functions.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module RuboCop
diff --git a/Library/Homebrew/rubocops/text.rb b/Library/Homebrew/rubocops/text.rb
index b8fa914e4..30417d0ed 100644
--- a/Library/Homebrew/rubocops/text.rb
+++ b/Library/Homebrew/rubocops/text.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/urls.rb b/Library/Homebrew/rubocops/urls.rb
index b23883d0c..83db786b8 100644
--- a/Library/Homebrew/rubocops/urls.rb
+++ b/Library/Homebrew/rubocops/urls.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/uses_from_macos.rb b/Library/Homebrew/rubocops/uses_from_macos.rb
index a71b6666e..e16464061 100644
--- a/Library/Homebrew/rubocops/uses_from_macos.rb
+++ b/Library/Homebrew/rubocops/uses_from_macos.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/rubocops/version.rb b/Library/Homebrew/rubocops/version.rb
index de47a9d29..2b6b53c01 100644
--- a/Library/Homebrew/rubocops/version.rb
+++ b/Library/Homebrew/rubocops/version.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rubocops/extend/formula"
diff --git a/Library/Homebrew/sandbox.rb b/Library/Homebrew/sandbox.rb
index a0ab6c214..5fdf3f491 100644
--- a/Library/Homebrew/sandbox.rb
+++ b/Library/Homebrew/sandbox.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "erb"
diff --git a/Library/Homebrew/search.rb b/Library/Homebrew/search.rb
index 29fe98e8c..942083a1c 100644
--- a/Library/Homebrew/search.rb
+++ b/Library/Homebrew/search.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "searchable"
diff --git a/Library/Homebrew/searchable.rb b/Library/Homebrew/searchable.rb
index 9b9adc760..634b84b56 100644
--- a/Library/Homebrew/searchable.rb
+++ b/Library/Homebrew/searchable.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Helper module for making a class searchable with both regular expressions and strings.
diff --git a/Library/Homebrew/software_spec.rb b/Library/Homebrew/software_spec.rb
index 91ff124c0..06f419608 100644
--- a/Library/Homebrew/software_spec.rb
+++ b/Library/Homebrew/software_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "resource"
diff --git a/Library/Homebrew/sorbet/files.yaml b/Library/Homebrew/sorbet/files.yaml
index 8eb08f59a..b3db036f7 100644
--- a/Library/Homebrew/sorbet/files.yaml
+++ b/Library/Homebrew/sorbet/files.yaml
@@ -1,964 +1,3 @@
-false:
-  - ./PATH.rb
-  - ./bintray.rb
-  - ./brew.rb
-  - ./build.rb
-  - ./build_environment.rb
-  - ./cask/artifact/abstract_artifact.rb
-  - ./cask/artifact/abstract_flight_block.rb
-  - ./cask/artifact/abstract_uninstall.rb
-  - ./cask/artifact/app.rb
-  - ./cask/artifact/artifact.rb
-  - ./cask/artifact/audio_unit_plugin.rb
-  - ./cask/artifact/binary.rb
-  - ./cask/artifact/colorpicker.rb
-  - ./cask/artifact/dictionary.rb
-  - ./cask/artifact/font.rb
-  - ./cask/artifact/input_method.rb
-  - ./cask/artifact/installer.rb
-  - ./cask/artifact/internet_plugin.rb
-  - ./cask/artifact/manpage.rb
-  - ./cask/artifact/mdimporter.rb
-  - ./cask/artifact/moved.rb
-  - ./cask/artifact/pkg.rb
-  - ./cask/artifact/postflight_block.rb
-  - ./cask/artifact/preflight_block.rb
-  - ./cask/artifact/prefpane.rb
-  - ./cask/artifact/qlplugin.rb
-  - ./cask/artifact/relocated.rb
-  - ./cask/artifact/screen_saver.rb
-  - ./cask/artifact/service.rb
-  - ./cask/artifact/stage_only.rb
-  - ./cask/artifact/suite.rb
-  - ./cask/artifact/symlinked.rb
-  - ./cask/artifact/uninstall.rb
-  - ./cask/artifact/vst3_plugin.rb
-  - ./cask/artifact/vst_plugin.rb
-  - ./cask/artifact/zap.rb
-  - ./cask/audit.rb
-  - ./cask/auditor.rb
-  - ./cask/cask.rb
-  - ./cask/cask_loader.rb
-  - ./cask/caskroom.rb
-  - ./cask/cmd.rb
-  - ./cask/cmd/--cache.rb
-  - ./cask/cmd/abstract_command.rb
-  - ./cask/cmd/abstract_internal_command.rb
-  - ./cask/cmd/audit.rb
-  - ./cask/cmd/cat.rb
-  - ./cask/cmd/create.rb
-  - ./cask/cmd/doctor.rb
-  - ./cask/cmd/edit.rb
-  - ./cask/cmd/fetch.rb
-  - ./cask/cmd/help.rb
-  - ./cask/cmd/home.rb
-  - ./cask/cmd/info.rb
-  - ./cask/cmd/install.rb
-  - ./cask/cmd/internal_help.rb
-  - ./cask/cmd/internal_stanza.rb
-  - ./cask/cmd/list.rb
-  - ./cask/cmd/outdated.rb
-  - ./cask/cmd/reinstall.rb
-  - ./cask/cmd/style.rb
-  - ./cask/cmd/uninstall.rb
-  - ./cask/cmd/upgrade.rb
-  - ./cask/cmd/zap.rb
-  - ./cask/config.rb
-  - ./cask/download.rb
-  - ./cask/dsl.rb
-  - ./cask/dsl/appcast.rb
-  - ./cask/dsl/base.rb
-  - ./cask/dsl/caveats.rb
-  - ./cask/dsl/conflicts_with.rb
-  - ./cask/dsl/container.rb
-  - ./cask/dsl/depends_on.rb
-  - ./cask/dsl/postflight.rb
-  - ./cask/dsl/preflight.rb
-  - ./cask/dsl/uninstall_preflight.rb
-  - ./cask/dsl/version.rb
-  - ./cask/exceptions.rb
-  - ./cask/installer.rb
-  - ./cask/metadata.rb
-  - ./cask/pkg.rb
-  - ./cask/quarantine.rb
-  - ./cask/staged.rb
-  - ./cask/topological_hash.rb
-  - ./cask/utils.rb
-  - ./cask/verify.rb
-  - ./caveats.rb
-  - ./cleanup.rb
-  - ./cli/parser.rb
-  - ./cmd/--cache.rb
-  - ./cmd/--caskroom.rb
-  - ./cmd/--cellar.rb
-  - ./cmd/--env.rb
-  - ./cmd/--prefix.rb
-  - ./cmd/--repository.rb
-  - ./cmd/--version.rb
-  - ./cmd/analytics.rb
-  - ./cmd/cask.rb
-  - ./cmd/cleanup.rb
-  - ./cmd/commands.rb
-  - ./cmd/config.rb
-  - ./cmd/deps.rb
-  - ./cmd/desc.rb
-  - ./cmd/doctor.rb
-  - ./cmd/fetch.rb
-  - ./cmd/gist-logs.rb
-  - ./cmd/help.rb
-  - ./cmd/home.rb
-  - ./cmd/info.rb
-  - ./cmd/install.rb
-  - ./cmd/leaves.rb
-  - ./cmd/link.rb
-  - ./cmd/list.rb
-  - ./cmd/log.rb
-  - ./cmd/migrate.rb
-  - ./cmd/missing.rb
-  - ./cmd/options.rb
-  - ./cmd/outdated.rb
-  - ./cmd/pin.rb
-  - ./cmd/postinstall.rb
-  - ./cmd/readall.rb
-  - ./cmd/reinstall.rb
-  - ./cmd/search.rb
-  - ./cmd/switch.rb
-  - ./cmd/tap-info.rb
-  - ./cmd/tap.rb
-  - ./cmd/uninstall.rb
-  - ./cmd/unlink.rb
-  - ./cmd/unpin.rb
-  - ./cmd/untap.rb
-  - ./cmd/update-report.rb
-  - ./cmd/upgrade.rb
-  - ./cmd/uses.rb
-  - ./commands.rb
-  - ./compat/language/haskell.rb
-  - ./compat/language/java.rb
-  - ./compat/language/python.rb
-  - ./cxxstdlib.rb
-  - ./debrew.rb
-  - ./debrew/irb.rb
-  - ./dependencies.rb
-  - ./dependency.rb
-  - ./dev-cmd/audit.rb
-  - ./dev-cmd/bottle.rb
-  - ./dev-cmd/bump-cask-pr.rb
-  - ./dev-cmd/bump-formula-pr.rb
-  - ./dev-cmd/bump-revision.rb
-  - ./dev-cmd/cat.rb
-  - ./dev-cmd/command.rb
-  - ./dev-cmd/create.rb
-  - ./dev-cmd/diy.rb
-  - ./dev-cmd/edit.rb
-  - ./dev-cmd/extract.rb
-  - ./dev-cmd/formula.rb
-  - ./dev-cmd/install-bundler-gems.rb
-  - ./dev-cmd/irb.rb
-  - ./dev-cmd/linkage.rb
-  - ./dev-cmd/livecheck.rb
-  - ./dev-cmd/man.rb
-  - ./dev-cmd/mirror.rb
-  - ./dev-cmd/pr-automerge.rb
-  - ./dev-cmd/pr-publish.rb
-  - ./dev-cmd/pr-pull.rb
-  - ./dev-cmd/pr-upload.rb
-  - ./dev-cmd/prof.rb
-  - ./dev-cmd/pull.rb
-  - ./dev-cmd/release-notes.rb
-  - ./dev-cmd/ruby.rb
-  - ./dev-cmd/sh.rb
-  - ./dev-cmd/sponsors.rb
-  - ./dev-cmd/style.rb
-  - ./dev-cmd/tap-new.rb
-  - ./dev-cmd/test.rb
-  - ./dev-cmd/tests.rb
-  - ./dev-cmd/typecheck.rb
-  - ./dev-cmd/unpack.rb
-  - ./dev-cmd/update-license-data.rb
-  - ./dev-cmd/update-python-resources.rb
-  - ./dev-cmd/update-test.rb
-  - ./dev-cmd/vendor-gems.rb
-  - ./development_tools.rb
-  - ./diagnostic.rb
-  - ./download_strategy.rb
-  - ./exceptions.rb
-  - ./extend/ENV.rb
-  - ./extend/ENV/shared.rb
-  - ./extend/ENV/std.rb
-  - ./extend/ENV/super.rb
-  - ./extend/git_repository.rb
-  - ./extend/hash_validator.rb
-  - ./extend/io.rb
-  - ./extend/module.rb
-  - ./extend/os/linux/dependency_collector.rb
-  - ./extend/os/linux/diagnostic.rb
-  - ./extend/os/linux/extend/ENV/shared.rb
-  - ./extend/os/linux/extend/ENV/std.rb
-  - ./extend/os/linux/extend/ENV/super.rb
-  - ./extend/os/linux/formula_cellar_checks.rb
-  - ./extend/os/linux/hardware/cpu.rb
-  - ./extend/os/linux/install.rb
-  - ./extend/os/linux/keg_relocate.rb
-  - ./extend/os/linux/linkage_checker.rb
-  - ./extend/os/linux/readall.rb
-  - ./extend/os/linux/requirements/java_requirement.rb
-  - ./extend/os/linux/requirements/osxfuse_requirement.rb
-  - ./extend/os/linux/system_config.rb
-  - ./extend/os/linux/tap.rb
-  - ./extend/os/linux/utils/analytics.rb
-  - ./extend/os/mac/caveats.rb
-  - ./extend/os/mac/dependency_collector.rb
-  - ./extend/os/mac/development_tools.rb
-  - ./extend/os/mac/diagnostic.rb
-  - ./extend/os/mac/extend/ENV/shared.rb
-  - ./extend/os/mac/extend/ENV/std.rb
-  - ./extend/os/mac/extend/ENV/super.rb
-  - ./extend/os/mac/extend/pathname.rb
-  - ./extend/os/mac/formula_cellar_checks.rb
-  - ./extend/os/mac/hardware.rb
-  - ./extend/os/mac/hardware/cpu.rb
-  - ./extend/os/mac/keg_relocate.rb
-  - ./extend/os/mac/language/java.rb
-  - ./extend/os/mac/missing_formula.rb
-  - ./extend/os/mac/requirements/java_requirement.rb
-  - ./extend/os/mac/requirements/osxfuse_requirement.rb
-  - ./extend/os/mac/requirements/x11_requirement.rb
-  - ./extend/os/mac/search.rb
-  - ./extend/os/mac/software_spec.rb
-  - ./extend/os/mac/system_config.rb
-  - ./extend/os/mac/unpack_strategy/zip.rb
-  - ./extend/os/mac/utils/bottles.rb
-  - ./extend/pathname.rb
-  - ./extend/predicable.rb
-  - ./extend/string.rb
-  - ./formula.rb
-  - ./formula_assertions.rb
-  - ./formula_cellar_checks.rb
-  - ./formula_creator.rb
-  - ./formula_info.rb
-  - ./formula_installer.rb
-  - ./formula_versions.rb
-  - ./formulary.rb
-  - ./global.rb
-  - ./keg.rb
-  - ./keg_relocate.rb
-  - ./language/node.rb
-  - ./language/python.rb
-  - ./linkage_checker.rb
-  - ./lock_file.rb
-  - ./migrator.rb
-  - ./missing_formula.rb
-  - ./mktemp.rb
-  - ./options.rb
-  - ./os/linux/elf.rb
-  - ./os/linux/global.rb
-  - ./os/mac.rb
-  - ./os/mac/architecture_list.rb
-  - ./os/mac/keg.rb
-  - ./os/mac/mach.rb
-  - ./os/mac/sdk.rb
-  - ./os/mac/version.rb
-  - ./os/mac/xcode.rb
-  - ./os/mac/xquartz.rb
-  - ./patch.rb
-  - ./pkg_version.rb
-  - ./postinstall.rb
-  - ./readall.rb
-  - ./requirement.rb
-  - ./requirements/arch_requirement.rb
-  - ./requirements/codesign_requirement.rb
-  - ./requirements/java_requirement.rb
-  - ./requirements/linux_requirement.rb
-  - ./requirements/macos_requirement.rb
-  - ./requirements/tuntap_requirement.rb
-  - ./requirements/x11_requirement.rb
-  - ./requirements/xcode_requirement.rb
-  - ./resource.rb
-  - ./rubocops/cask/ast/cask_block.rb
-  - ./rubocops/cask/extend/node.rb
-  - ./rubocops/cask/homepage_matches_url.rb
-  - ./rubocops/cask/homepage_url_trailing_slash.rb
-  - ./rubocops/cask/mixin/cask_help.rb
-  - ./rubocops/cask/mixin/on_desc_stanza.rb
-  - ./rubocops/cask/mixin/on_homepage_stanza.rb
-  - ./rubocops/cask/no_dsl_version.rb
-  - ./rubocops/cask/stanza_grouping.rb
-  - ./rubocops/cask/stanza_order.rb
-  - ./rubocops/caveats.rb
-  - ./rubocops/checksum.rb
-  - ./rubocops/class.rb
-  - ./rubocops/components_order.rb
-  - ./rubocops/components_redundancy.rb
-  - ./rubocops/conflicts.rb
-  - ./rubocops/dependency_order.rb
-  - ./rubocops/extend/formula.rb
-  - ./rubocops/files.rb
-  - ./rubocops/formula_desc.rb
-  - ./rubocops/homepage.rb
-  - ./rubocops/keg_only.rb
-  - ./rubocops/lines.rb
-  - ./rubocops/options.rb
-  - ./rubocops/patches.rb
-  - ./rubocops/shared/desc_helper.rb
-  - ./rubocops/shared/helper_functions.rb
-  - ./rubocops/text.rb
-  - ./rubocops/urls.rb
-  - ./rubocops/uses_from_macos.rb
-  - ./rubocops/version.rb
-  - ./sandbox.rb
-  - ./search.rb
-  - ./searchable.rb
-  - ./software_spec.rb
-  - ./style.rb
-  - ./system_command.rb
-  - ./system_config.rb
-  - ./tab.rb
-  - ./tap.rb
-  - ./test.rb
-  - ./test/ENV_spec.rb
-  - ./test/PATH_spec.rb
-  - ./test/bash_spec.rb
-  - ./test/bintray_spec.rb
-  - ./test/bottle_filename_spec.rb
-  - ./test/build_environment_spec.rb
-  - ./test/build_options_spec.rb
-  - ./test/cache_store_spec.rb
-  - ./test/cask/artifact/alt_target_spec.rb
-  - ./test/cask/artifact/app_spec.rb
-  - ./test/cask/artifact/binary_spec.rb
-  - ./test/cask/artifact/generic_artifact_spec.rb
-  - ./test/cask/artifact/installer_spec.rb
-  - ./test/cask/artifact/manpage_spec.rb
-  - ./test/cask/artifact/pkg_spec.rb
-  - ./test/cask/artifact/postflight_block_spec.rb
-  - ./test/cask/artifact/preflight_block_spec.rb
-  - ./test/cask/artifact/shared_examples/uninstall_zap.rb
-  - ./test/cask/artifact/suite_spec.rb
-  - ./test/cask/artifact/two_apps_correct_spec.rb
-  - ./test/cask/artifact/uninstall_no_zap_spec.rb
-  - ./test/cask/artifact/uninstall_spec.rb
-  - ./test/cask/artifact/zap_spec.rb
-  - ./test/cask/audit_spec.rb
-  - ./test/cask/cask_loader/from__path_loader_spec.rb
-  - ./test/cask/cask_loader/from_content_loader_spec.rb
-  - ./test/cask/cask_loader/from_uri_loader_spec.rb
-  - ./test/cask/cask_spec.rb
-  - ./test/cask/cmd/audit_spec.rb
-  - ./test/cask/cmd/cache_spec.rb
-  - ./test/cask/cmd/cat_spec.rb
-  - ./test/cask/cmd/create_spec.rb
-  - ./test/cask/cmd/doctor_spec.rb
-  - ./test/cask/cmd/edit_spec.rb
-  - ./test/cask/cmd/fetch_spec.rb
-  - ./test/cask/cmd/home_spec.rb
-  - ./test/cask/cmd/info_spec.rb
-  - ./test/cask/cmd/install_spec.rb
-  - ./test/cask/cmd/internal_stanza_spec.rb
-  - ./test/cask/cmd/list_spec.rb
-  - ./test/cask/cmd/outdated_spec.rb
-  - ./test/cask/cmd/reinstall_spec.rb
-  - ./test/cask/cmd/shared_examples/invalid_option.rb
-  - ./test/cask/cmd/shared_examples/requires_cask_token.rb
-  - ./test/cask/cmd/style_spec.rb
-  - ./test/cask/cmd/uninstall_spec.rb
-  - ./test/cask/cmd/upgrade_spec.rb
-  - ./test/cask/cmd/zap_spec.rb
-  - ./test/cask/cmd_spec.rb
-  - ./test/cask/config_spec.rb
-  - ./test/cask/conflicts_with_spec.rb
-  - ./test/cask/denylist_spec.rb
-  - ./test/cask/depends_on_spec.rb
-  - ./test/cask/dsl/appcast_spec.rb
-  - ./test/cask/dsl/caveats_spec.rb
-  - ./test/cask/dsl/postflight_spec.rb
-  - ./test/cask/dsl/preflight_spec.rb
-  - ./test/cask/dsl/shared_examples/base.rb
-  - ./test/cask/dsl/shared_examples/staged.rb
-  - ./test/cask/dsl/uninstall_postflight_spec.rb
-  - ./test/cask/dsl/uninstall_preflight_spec.rb
-  - ./test/cask/dsl/version_spec.rb
-  - ./test/cask/dsl_spec.rb
-  - ./test/cask/installer_spec.rb
-  - ./test/cask/macos_spec.rb
-  - ./test/cask/pkg_spec.rb
-  - ./test/cask/quarantine_spec.rb
-  - ./test/cask/verify_spec.rb
-  - ./test/cask_dependent_spec.rb
-  - ./test/caveats_spec.rb
-  - ./test/checksum_spec.rb
-  - ./test/checksum_verification_spec.rb
-  - ./test/cleaner_spec.rb
-  - ./test/cleanup_spec.rb
-  - ./test/cli/parser_spec.rb
-  - ./test/cmd/--cache_spec.rb
-  - ./test/cmd/--caskroom_spec.rb
-  - ./test/cmd/--cellar_spec.rb
-  - ./test/cmd/--env_spec.rb
-  - ./test/cmd/--prefix_spec.rb
-  - ./test/cmd/--repository_spec.rb
-  - ./test/cmd/--version_spec.rb
-  - ./test/cmd/analytics_spec.rb
-  - ./test/cmd/bundle_spec.rb
-  - ./test/cmd/cask_spec.rb
-  - ./test/cmd/cleanup_spec.rb
-  - ./test/cmd/commands_spec.rb
-  - ./test/cmd/config_spec.rb
-  - ./test/cmd/custom-external-command_spec.rb
-  - ./test/cmd/deps_spec.rb
-  - ./test/cmd/desc_spec.rb
-  - ./test/cmd/doctor_spec.rb
-  - ./test/cmd/fetch_spec.rb
-  - ./test/cmd/gist-logs_spec.rb
-  - ./test/cmd/help_spec.rb
-  - ./test/cmd/home_spec.rb
-  - ./test/cmd/info_spec.rb
-  - ./test/cmd/install_spec.rb
-  - ./test/cmd/leaves_spec.rb
-  - ./test/cmd/link_spec.rb
-  - ./test/cmd/list_spec.rb
-  - ./test/cmd/log_spec.rb
-  - ./test/cmd/migrate_spec.rb
-  - ./test/cmd/missing_spec.rb
-  - ./test/cmd/options_spec.rb
-  - ./test/cmd/outdated_spec.rb
-  - ./test/cmd/pin_spec.rb
-  - ./test/cmd/postinstall_spec.rb
-  - ./test/cmd/readall_spec.rb
-  - ./test/cmd/reinstall_spec.rb
-  - ./test/cmd/search_spec.rb
-  - ./test/cmd/services_spec.rb
-  - ./test/cmd/shared_examples/args_parse.rb
-  - ./test/cmd/switch_spec.rb
-  - ./test/cmd/tap-info_spec.rb
-  - ./test/cmd/tap_spec.rb
-  - ./test/cmd/uninstall_spec.rb
-  - ./test/cmd/unlink_spec.rb
-  - ./test/cmd/unpin_spec.rb
-  - ./test/cmd/untap_spec.rb
-  - ./test/cmd/update-report_spec.rb
-  - ./test/cmd/upgrade_spec.rb
-  - ./test/cmd/uses_spec.rb
-  - ./test/commands_spec.rb
-  - ./test/compiler_failure_spec.rb
-  - ./test/compiler_selector_spec.rb
-  - ./test/cxxstdlib_spec.rb
-  - ./test/dependable_spec.rb
-  - ./test/dependencies_helpers_spec.rb
-  - ./test/dependencies_spec.rb
-  - ./test/dependency_collector_spec.rb
-  - ./test/dependency_expansion_spec.rb
-  - ./test/dependency_spec.rb
-  - ./test/description_cache_store_spec.rb
-  - ./test/descriptions_spec.rb
-  - ./test/dev-cmd/audit_spec.rb
-  - ./test/dev-cmd/bottle_spec.rb
-  - ./test/dev-cmd/bump-cask-pr_spec.rb
-  - ./test/dev-cmd/bump-formula-pr_spec.rb
-  - ./test/dev-cmd/bump-revision_spec.rb
-  - ./test/dev-cmd/cat_spec.rb
-  - ./test/dev-cmd/command_spec.rb
-  - ./test/dev-cmd/create_spec.rb
-  - ./test/dev-cmd/diy_spec.rb
-  - ./test/dev-cmd/edit_spec.rb
-  - ./test/dev-cmd/extract_spec.rb
-  - ./test/dev-cmd/formula_spec.rb
-  - ./test/dev-cmd/irb_spec.rb
-  - ./test/dev-cmd/linkage_spec.rb
-  - ./test/dev-cmd/man_spec.rb
-  - ./test/dev-cmd/mirror_spec.rb
-  - ./test/dev-cmd/pr-automerge_spec.rb
-  - ./test/dev-cmd/pr-publish_spec.rb
-  - ./test/dev-cmd/pr-pull_spec.rb
-  - ./test/dev-cmd/pr-upload_spec.rb
-  - ./test/dev-cmd/prof_spec.rb
-  - ./test/dev-cmd/release-notes_spec.rb
-  - ./test/dev-cmd/ruby_spec.rb
-  - ./test/dev-cmd/sh_spec.rb
-  - ./test/dev-cmd/sponsors_spec.rb
-  - ./test/dev-cmd/style_spec.rb
-  - ./test/dev-cmd/tap-new_spec.rb
-  - ./test/dev-cmd/test_spec.rb
-  - ./test/dev-cmd/unpack_spec.rb
-  - ./test/dev-cmd/update-license-data_spec.rb
-  - ./test/dev-cmd/vendor-gems_spec.rb
-  - ./test/diagnostic_checks_spec.rb
-  - ./test/download_strategies_spec.rb
-  - ./test/env_config_spec.rb
-  - ./test/error_during_execution_spec.rb
-  - ./test/exceptions_spec.rb
-  - ./test/formatter_spec.rb
-  - ./test/formula_free_port_spec.rb
-  - ./test/formula_info_spec.rb
-  - ./test/formula_installer_bottle_spec.rb
-  - ./test/formula_installer_spec.rb
-  - ./test/formula_pin_spec.rb
-  - ./test/formula_spec.rb
-  - ./test/formula_spec_selection_spec.rb
-  - ./test/formula_support_spec.rb
-  - ./test/formula_validation_spec.rb
-  - ./test/formulary_spec.rb
-  - ./test/hardware/cpu_spec.rb
-  - ./test/inreplace_spec.rb
-  - ./test/java_requirement_spec.rb
-  - ./test/keg_spec.rb
-  - ./test/language/go_spec.rb
-  - ./test/language/java_spec.rb
-  - ./test/language/node_spec.rb
-  - ./test/language/perl/shebang_spec.rb
-  - ./test/language/python_spec.rb
-  - ./test/lazy_object_spec.rb
-  - ./test/linkage_cache_store_spec.rb
-  - ./test/livecheck_spec.rb
-  - ./test/locale_spec.rb
-  - ./test/lock_file_spec.rb
-  - ./test/messages_spec.rb
-  - ./test/migrator_spec.rb
-  - ./test/missing_formula_spec.rb
-  - ./test/options_spec.rb
-  - ./test/os/linux/dependency_collector_spec.rb
-  - ./test/os/linux/diagnostic_spec.rb
-  - ./test/os/linux/formula_spec.rb
-  - ./test/os/linux/pathname_spec.rb
-  - ./test/os/mac/dependency_collector_spec.rb
-  - ./test/os/mac/diagnostic_spec.rb
-  - ./test/os/mac/formula_spec.rb
-  - ./test/os/mac/java_requirement_spec.rb
-  - ./test/os/mac/keg_spec.rb
-  - ./test/os/mac/mach_spec.rb
-  - ./test/os/mac/software_spec_spec.rb
-  - ./test/os/mac/version_spec.rb
-  - ./test/os/mac_spec.rb
-  - ./test/patch_spec.rb
-  - ./test/patching_spec.rb
-  - ./test/pathname_spec.rb
-  - ./test/pkg_version_spec.rb
-  - ./test/requirement_spec.rb
-  - ./test/requirements/codesign_requirement_spec.rb
-  - ./test/requirements/java_requirement_spec.rb
-  - ./test/requirements/linux_requirement_spec.rb
-  - ./test/requirements/macos_requirement_spec.rb
-  - ./test/requirements/osxfuse_requirement_spec.rb
-  - ./test/requirements_spec.rb
-  - ./test/resource_spec.rb
-  - ./test/rubocop_spec.rb
-  - ./test/rubocops/cask/desc_spec.rb
-  - ./test/rubocops/cask/homepage_matches_url_spec.rb
-  - ./test/rubocops/cask/homepage_url_trailing_slash_spec.rb
-  - ./test/rubocops/cask/no_dsl_version_spec.rb
-  - ./test/rubocops/cask/shared_examples/cask_cop.rb
-  - ./test/rubocops/cask/stanza_grouping_spec.rb
-  - ./test/rubocops/cask/stanza_order_spec.rb
-  - ./test/rubocops/caveats_spec.rb
-  - ./test/rubocops/checksum_spec.rb
-  - ./test/rubocops/class_spec.rb
-  - ./test/rubocops/components_order_spec.rb
-  - ./test/rubocops/components_redundancy_spec.rb
-  - ./test/rubocops/conflicts_spec.rb
-  - ./test/rubocops/dependency_order_spec.rb
-  - ./test/rubocops/files_spec.rb
-  - ./test/rubocops/formula_desc_spec.rb
-  - ./test/rubocops/homepage_spec.rb
-  - ./test/rubocops/keg_only_spec.rb
-  - ./test/rubocops/lines_spec.rb
-  - ./test/rubocops/options_spec.rb
-  - ./test/rubocops/patches_spec.rb
-  - ./test/rubocops/text_spec.rb
-  - ./test/rubocops/urls_spec.rb
-  - ./test/rubocops/uses_from_macos_spec.rb
-  - ./test/rubocops/version_spec.rb
-  - ./test/sandbox_spec.rb
-  - ./test/search_spec.rb
-  - ./test/searchable_spec.rb
-  - ./test/software_spec_spec.rb
-  - ./test/spec_helper.rb
-  - ./test/string_spec.rb
-  - ./test/style_spec.rb
-  - ./test/support/fixtures/cask/Casks/adobe-air.rb
-  - ./test/support/fixtures/cask/Casks/adobe-illustrator.rb
-  - ./test/support/fixtures/cask/Casks/appdir-interpolation.rb
-  - ./test/support/fixtures/cask/Casks/auto-updates.rb
-  - ./test/support/fixtures/cask/Casks/bad-checksum.rb
-  - ./test/support/fixtures/cask/Casks/bad-checksum2.rb
-  - ./test/support/fixtures/cask/Casks/basic-cask.rb
-  - ./test/support/fixtures/cask/Casks/booby-trap.rb
-  - ./test/support/fixtures/cask/Casks/compat/with-depends-on-macos-string.rb
-  - ./test/support/fixtures/cask/Casks/container-7z.rb
-  - ./test/support/fixtures/cask/Casks/container-bzip2.rb
-  - ./test/support/fixtures/cask/Casks/container-cab.rb
-  - ./test/support/fixtures/cask/Casks/container-dmg.rb
-  - ./test/support/fixtures/cask/Casks/container-gzip.rb
-  - ./test/support/fixtures/cask/Casks/container-pkg.rb
-  - ./test/support/fixtures/cask/Casks/container-tar-gz.rb
-  - ./test/support/fixtures/cask/Casks/container-xar.rb
-  - ./test/support/fixtures/cask/Casks/devmate-with-appcast.rb
-  - ./test/support/fixtures/cask/Casks/devmate-without-appcast.rb
-  - ./test/support/fixtures/cask/Casks/generic-artifact-absolute-target.rb
-  - ./test/support/fixtures/cask/Casks/generic-artifact-relative-target.rb
-  - ./test/support/fixtures/cask/Casks/github-with-appcast.rb
-  - ./test/support/fixtures/cask/Casks/github-without-appcast.rb
-  - ./test/support/fixtures/cask/Casks/hockeyapp-with-appcast.rb
-  - ./test/support/fixtures/cask/Casks/hockeyapp-without-appcast.rb
-  - ./test/support/fixtures/cask/Casks/installer-with-uninstall.rb
-  - ./test/support/fixtures/cask/Casks/invalid-sha256.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-appcast-multiple.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-appcast-url.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-conflicts-with-key.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-depends-on-arch-value.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-depends-on-key.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-depends-on-macos-bad-release.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-depends-on-macos-conflicting-forms.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-depends-on-x11-value.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-generic-artifact-no-target.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-header-format.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-header-token-mismatch.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-header-version.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-manpage-no-section.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-stage-only-conflict.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-two-homepage.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-two-url.rb
-  - ./test/support/fixtures/cask/Casks/invalid/invalid-two-version.rb
-  - ./test/support/fixtures/cask/Casks/latest-with-appcast.rb
-  - ./test/support/fixtures/cask/Casks/latest-with-auto-updates.rb
-  - ./test/support/fixtures/cask/Casks/local-caffeine.rb
-  - ./test/support/fixtures/cask/Casks/local-transmission.rb
-  - ./test/support/fixtures/cask/Casks/missing-checksum.rb
-  - ./test/support/fixtures/cask/Casks/missing-homepage.rb
-  - ./test/support/fixtures/cask/Casks/missing-name.rb
-  - ./test/support/fixtures/cask/Casks/missing-sha256.rb
-  - ./test/support/fixtures/cask/Casks/missing-url.rb
-  - ./test/support/fixtures/cask/Casks/missing-version.rb
-  - ./test/support/fixtures/cask/Casks/naked-executable.rb
-  - ./test/support/fixtures/cask/Casks/nested-app.rb
-  - ./test/support/fixtures/cask/Casks/no-checksum.rb
-  - ./test/support/fixtures/cask/Casks/no-dsl-version.rb
-  - ./test/support/fixtures/cask/Casks/osdn-correct-url-format.rb
-  - ./test/support/fixtures/cask/Casks/osdn-incorrect-url-format.rb
-  - ./test/support/fixtures/cask/Casks/outdated/auto-updates.rb
-  - ./test/support/fixtures/cask/Casks/outdated/bad-checksum.rb
-  - ./test/support/fixtures/cask/Casks/outdated/bad-checksum2.rb
-  - ./test/support/fixtures/cask/Casks/outdated/local-caffeine.rb
-  - ./test/support/fixtures/cask/Casks/outdated/local-transmission.rb
-  - ./test/support/fixtures/cask/Casks/outdated/version-latest.rb
-  - ./test/support/fixtures/cask/Casks/outdated/will-fail-if-upgraded.rb
-  - ./test/support/fixtures/cask/Casks/pkg-without-uninstall.rb
-  - ./test/support/fixtures/cask/Casks/sha256-for-empty-string.rb
-  - ./test/support/fixtures/cask/Casks/sourceforge-correct-url-format.rb
-  - ./test/support/fixtures/cask/Casks/sourceforge-incorrect-url-format.rb
-  - ./test/support/fixtures/cask/Casks/sourceforge-version-latest-correct-url-format.rb
-  - ./test/support/fixtures/cask/Casks/sourceforge-with-appcast.rb
-  - ./test/support/fixtures/cask/Casks/stage-only.rb
-  - ./test/support/fixtures/cask/Casks/test-opera-mail.rb
-  - ./test/support/fixtures/cask/Casks/test-opera.rb
-  - ./test/support/fixtures/cask/Casks/version-latest-string.rb
-  - ./test/support/fixtures/cask/Casks/version-latest-with-checksum.rb
-  - ./test/support/fixtures/cask/Casks/version-latest.rb
-  - ./test/support/fixtures/cask/Casks/will-fail-if-upgraded.rb
-  - ./test/support/fixtures/cask/Casks/with-allow-untrusted.rb
-  - ./test/support/fixtures/cask/Casks/with-alt-target.rb
-  - ./test/support/fixtures/cask/Casks/with-appcast.rb
-  - ./test/support/fixtures/cask/Casks/with-auto-updates.rb
-  - ./test/support/fixtures/cask/Casks/with-autodetected-manpage-section.rb
-  - ./test/support/fixtures/cask/Casks/with-binary.rb
-  - ./test/support/fixtures/cask/Casks/with-caveats.rb
-  - ./test/support/fixtures/cask/Casks/with-choices.rb
-  - ./test/support/fixtures/cask/Casks/with-conditional-caveats.rb
-  - ./test/support/fixtures/cask/Casks/with-conflicts-with.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-arch.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-cask-cyclic-helper.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-cask-cyclic.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-cask-multiple.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-cask.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-formula-multiple.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-formula.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-macos-array.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-macos-comparison.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-macos-failure.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-macos-symbol.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-x11-false.rb
-  - ./test/support/fixtures/cask/Casks/with-depends-on-x11.rb
-  - ./test/support/fixtures/cask/Casks/with-embedded-binary.rb
-  - ./test/support/fixtures/cask/Casks/with-generic-artifact.rb
-  - ./test/support/fixtures/cask/Casks/with-installable.rb
-  - ./test/support/fixtures/cask/Casks/with-installer-manual.rb
-  - ./test/support/fixtures/cask/Casks/with-installer-script.rb
-  - ./test/support/fixtures/cask/Casks/with-languages.rb
-  - ./test/support/fixtures/cask/Casks/with-macosx-dir.rb
-  - ./test/support/fixtures/cask/Casks/with-non-executable-binary.rb
-  - ./test/support/fixtures/cask/Casks/with-pkgutil-zap.rb
-  - ./test/support/fixtures/cask/Casks/with-postflight-multi.rb
-  - ./test/support/fixtures/cask/Casks/with-postflight.rb
-  - ./test/support/fixtures/cask/Casks/with-preflight-multi.rb
-  - ./test/support/fixtures/cask/Casks/with-preflight.rb
-  - ./test/support/fixtures/cask/Casks/with-suite.rb
-  - ./test/support/fixtures/cask/Casks/with-two-apps-correct.rb
-  - ./test/support/fixtures/cask/Casks/with-two-apps-subdir.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-delete.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-early-script.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-kext.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-launchctl.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-login-item.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-multi.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-pkgutil.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-postflight-multi.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-postflight.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-preflight-multi.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-preflight.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-quit.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-rmdir.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-script-app.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-script.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-signal.rb
-  - ./test/support/fixtures/cask/Casks/with-uninstall-trash.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-delete.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-early-script.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-kext.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-launchctl.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-login-item.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-multi.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-pkgutil.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-quit.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-rmdir.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-script.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-signal.rb
-  - ./test/support/fixtures/cask/Casks/with-zap-trash.rb
-  - ./test/support/fixtures/cask/Casks/with-zap.rb
-  - ./test/support/fixtures/cask/Casks/without-languages.rb
-  - ./test/support/fixtures/failball.rb
-  - ./test/support/fixtures/testball.rb
-  - ./test/support/fixtures/testball_bottle.rb
-  - ./test/support/fixtures/third-party/Casks/pharo.rb
-  - ./test/support/fixtures/third-party/Casks/third-party-cask.rb
-  - ./test/support/github_formatter.rb
-  - ./test/support/helper/cask/fake_system_command.rb
-  - ./test/support/helper/cask/install_helper.rb
-  - ./test/support/helper/cask/never_sudo_system_command.rb
-  - ./test/support/helper/formula.rb
-  - ./test/support/helper/integration_mocks.rb
-  - ./test/support/helper/mktmpdir.rb
-  - ./test/support/helper/output_as_tty.rb
-  - ./test/support/helper/spec/shared_context/homebrew_cask.rb
-  - ./test/support/helper/spec/shared_context/integration_test.rb
-  - ./test/support/helper/spec/shared_examples/formulae_exist.rb
-  - ./test/support/no_seed_progress_formatter.rb
-  - ./test/system_command_result_spec.rb
-  - ./test/system_command_spec.rb
-  - ./test/tab_spec.rb
-  - ./test/tap_spec.rb
-  - ./test/unpack_strategy/bazaar_spec.rb
-  - ./test/unpack_strategy/bzip2_spec.rb
-  - ./test/unpack_strategy/cvs_spec.rb
-  - ./test/unpack_strategy/directory_spec.rb
-  - ./test/unpack_strategy/dmg_spec.rb
-  - ./test/unpack_strategy/git_spec.rb
-  - ./test/unpack_strategy/gzip_spec.rb
-  - ./test/unpack_strategy/jar_spec.rb
-  - ./test/unpack_strategy/lha_spec.rb
-  - ./test/unpack_strategy/lzip_spec.rb
-  - ./test/unpack_strategy/mercurial_spec.rb
-  - ./test/unpack_strategy/p7zip_spec.rb
-  - ./test/unpack_strategy/rar_spec.rb
-  - ./test/unpack_strategy/shared_examples.rb
-  - ./test/unpack_strategy/subversion_spec.rb
-  - ./test/unpack_strategy/tar_spec.rb
-  - ./test/unpack_strategy/uncompressed_spec.rb
-  - ./test/unpack_strategy/xar_spec.rb
-  - ./test/unpack_strategy/xz_spec.rb
-  - ./test/unpack_strategy/zip_spec.rb
-  - ./test/unpack_strategy_spec.rb
-  - ./test/utils/analytics_spec.rb
-  - ./test/utils/bottles/bintray_spec.rb
-  - ./test/utils/bottles/bottles_spec.rb
-  - ./test/utils/bottles/collector_spec.rb
-  - ./test/utils/curl_spec.rb
-  - ./test/utils/fork_spec.rb
-  - ./test/utils/git_spec.rb
-  - ./test/utils/github/actions_spec.rb
-  - ./test/utils/github_spec.rb
-  - ./test/utils/popen_spec.rb
-  - ./test/utils/shell_spec.rb
-  - ./test/utils/spdx_spec.rb
-  - ./test/utils/svn_spec.rb
-  - ./test/utils/tar_spec.rb
-  - ./test/utils/tty_spec.rb
-  - ./test/utils/user_spec.rb
-  - ./test/utils_spec.rb
-  - ./test/version_spec.rb
-  - ./test/x11_requirement_spec.rb
-  - ./unpack_strategy.rb
-  - ./unpack_strategy/air.rb
-  - ./unpack_strategy/bazaar.rb
-  - ./unpack_strategy/bzip2.rb
-  - ./unpack_strategy/cab.rb
-  - ./unpack_strategy/compress.rb
-  - ./unpack_strategy/cvs.rb
-  - ./unpack_strategy/directory.rb
-  - ./unpack_strategy/dmg.rb
-  - ./unpack_strategy/executable.rb
-  - ./unpack_strategy/fossil.rb
-  - ./unpack_strategy/generic_unar.rb
-  - ./unpack_strategy/git.rb
-  - ./unpack_strategy/gzip.rb
-  - ./unpack_strategy/jar.rb
-  - ./unpack_strategy/lha.rb
-  - ./unpack_strategy/lua_rock.rb
-  - ./unpack_strategy/lzip.rb
-  - ./unpack_strategy/lzma.rb
-  - ./unpack_strategy/mercurial.rb
-  - ./unpack_strategy/microsoft_office_xml.rb
-  - ./unpack_strategy/otf.rb
-  - ./unpack_strategy/p7zip.rb
-  - ./unpack_strategy/pax.rb
-  - ./unpack_strategy/pkg.rb
-  - ./unpack_strategy/rar.rb
-  - ./unpack_strategy/self_extracting_executable.rb
-  - ./unpack_strategy/sit.rb
-  - ./unpack_strategy/subversion.rb
-  - ./unpack_strategy/tar.rb
-  - ./unpack_strategy/ttf.rb
-  - ./unpack_strategy/uncompressed.rb
-  - ./unpack_strategy/xar.rb
-  - ./unpack_strategy/xz.rb
-  - ./unpack_strategy/zip.rb
-  - ./upgrade.rb
-  - ./utils.rb
-  - ./utils/analytics.rb
-  - ./utils/curl.rb
-  - ./utils/fork.rb
-  - ./utils/formatter.rb
-  - ./utils/gems.rb
-  - ./utils/git.rb
-  - ./utils/github.rb
-  - ./utils/github/actions.rb
-  - ./utils/popen.rb
-  - ./utils/pypi.rb
-  - ./version.rb
-
-true:
-  - ./build_options.rb
-  - ./cache_store.rb
-  - ./cask_dependent.rb
-  - ./cask/cache.rb
-  - ./cask/denylist.rb
-  - ./cask/macos.rb
-  - ./cask/url.rb
-  - ./checksum.rb
-  - ./cleaner.rb
-  - ./cli/args.rb
-  - ./compat/cli/parser.rb
-  - ./compat/dependencies_helpers.rb
-  - ./compat/extend/nil.rb
-  - ./compat/extend/string.rb
-  - ./compat/formula.rb
-  - ./compat/os/mac.rb
-  - ./compilers.rb
-  - ./config.rb
-  - ./context.rb
-  - ./dependable.rb
-  - ./dependencies_helpers.rb
-  - ./dependency_collector.rb
-  - ./deprecate_disable.rb
-  - ./description_cache_store.rb
-  - ./descriptions.rb
-  - ./env_config.rb
-  - ./extend/cachable.rb
-  - ./extend/os/linux/development_tools.rb
-  - ./extend/os/linux/formula.rb
-  - ./extend/os/linux/resource.rb
-  - ./extend/os/linux/software_spec.rb
-  - ./extend/os/mac/cleaner.rb
-  - ./extend/os/mac/formula.rb
-  - ./extend/os/mac/keg.rb
-  - ./extend/os/mac/resource.rb
-  - ./extend/os/mac/utils/analytics.rb
-  - ./fetch.rb
-  - ./formula_free_port.rb
-  - ./formula_pin.rb
-  - ./formula_support.rb
-  - ./hardware.rb
-  - ./help.rb
-  - ./install.rb
-  - ./install_renamed.rb
-  - ./language/go.rb
-  - ./language/java.rb
-  - ./language/perl.rb
-  - ./lazy_object.rb
-  - ./linkage_cache_store.rb
-  - ./livecheck.rb
-  - ./load_path.rb
-  - ./locale.rb
-  - ./messages.rb
-  - ./metafiles.rb
-  - ./official_taps.rb
-  - ./os.rb
-  - ./os/linux.rb
-  - ./os/linux/glibc.rb
-  - ./os/linux/kernel.rb
-  - ./reinstall.rb
-  - ./rubocops/cask/ast/cask_header.rb
-  - ./rubocops/cask/ast/stanza.rb
-  - ./rubocops/cask/constants/stanza.rb
-  - ./rubocops/cask/desc.rb
-  - ./rubocops/cask/extend/string.rb
-  - ./tap_constants.rb
-  - ./test/support/helper/fixtures.rb
-  - ./test/support/lib/config.rb
-  - ./utils/bottles.rb
-  - ./utils/inreplace.rb
-  - ./utils/link.rb
-  - ./utils/ruby_check_version_script.rb
-  - ./utils/shared_audits.rb
-  - ./utils/shebang.rb
-  - ./utils/shell.rb
-  - ./utils/spdx.rb
-  - ./utils/svn.rb
-  - ./utils/tar.rb
-  - ./utils/tty.rb
-  - ./utils/user.rb
-  - ./version/null.rb
-
-strict:
-  - ./cask.rb
-  - ./cask/artifact.rb
-  - ./cask/dsl/uninstall_postflight.rb
-  - ./compat.rb
-  - ./extend/optparse.rb
-  - ./extend/os/bottles.rb
-  - ./extend/os/caveats.rb
-  - ./extend/os/cleaner.rb
-  - ./extend/os/dependency_collector.rb
-  - ./extend/os/development_tools.rb
-  - ./extend/os/diagnostic.rb
-  - ./extend/os/extend/ENV/shared.rb
-  - ./extend/os/extend/ENV/std.rb
-  - ./extend/os/extend/ENV/super.rb
-  - ./extend/os/formula.rb
-  - ./extend/os/formula_cellar_checks.rb
-  - ./extend/os/formula_support.rb
-  - ./extend/os/hardware.rb
-  - ./extend/os/install.rb
-  - ./extend/os/keg.rb
-  - ./extend/os/keg_relocate.rb
-  - ./extend/os/language/java.rb
-  - ./extend/os/linkage_checker.rb
-  - ./extend/os/linux/cleaner.rb
-  - ./extend/os/linux/extend/pathname.rb
-  - ./extend/os/mac/formula_support.rb
-  - ./extend/os/missing_formula.rb
-  - ./extend/os/pathname.rb
-  - ./extend/os/readall.rb
-  - ./extend/os/requirements/java_requirement.rb
-  - ./extend/os/requirements/osxfuse_requirement.rb
-  - ./extend/os/requirements/x11_requirement.rb
-  - ./extend/os/resource.rb
-  - ./extend/os/search.rb
-  - ./extend/os/software_spec.rb
-  - ./extend/os/system_config.rb
-  - ./extend/os/tap.rb
-  - ./extend/os/utils/analytics.rb
-  - ./language/haskell.rb
-  - ./os/global.rb
-  - ./requirements.rb
-  - ./requirements/osxfuse_requirement.rb
-  - ./rubocops.rb
-  - ./rubocops/rubocop-cask.rb
+false: []
+true: []
+strict: []
diff --git a/Library/Homebrew/style.rb b/Library/Homebrew/style.rb
index 1fbc2420e..437df8a77 100644
--- a/Library/Homebrew/style.rb
+++ b/Library/Homebrew/style.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "shellwords"
diff --git a/Library/Homebrew/system_command.rb b/Library/Homebrew/system_command.rb
index 89307f7c3..33f3781d7 100644
--- a/Library/Homebrew/system_command.rb
+++ b/Library/Homebrew/system_command.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/system_config.rb b/Library/Homebrew/system_config.rb
index a377e3bc2..5af0d7dbd 100644
--- a/Library/Homebrew/system_config.rb
+++ b/Library/Homebrew/system_config.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "hardware"
diff --git a/Library/Homebrew/tab.rb b/Library/Homebrew/tab.rb
index 8283d08cb..099eb3b1e 100644
--- a/Library/Homebrew/tab.rb
+++ b/Library/Homebrew/tab.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cxxstdlib"
diff --git a/Library/Homebrew/tap.rb b/Library/Homebrew/tap.rb
index 0ccee1b2c..8c6fb892d 100644
--- a/Library/Homebrew/tap.rb
+++ b/Library/Homebrew/tap.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "commands"
diff --git a/Library/Homebrew/tap_constants.rb b/Library/Homebrew/tap_constants.rb
index c375ba8dc..1da9c0e57 100644
--- a/Library/Homebrew/tap_constants.rb
+++ b/Library/Homebrew/tap_constants.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # match taps' formulae, e.g. someuser/sometap/someformula
diff --git a/Library/Homebrew/test.rb b/Library/Homebrew/test.rb
index 735775fc3..82cc34e69 100644
--- a/Library/Homebrew/test.rb
+++ b/Library/Homebrew/test.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 old_trap = trap("INT") { exit! 130 }
diff --git a/Library/Homebrew/test/ENV_spec.rb b/Library/Homebrew/test/ENV_spec.rb
index 9a9196036..c0f5cfe76 100644
--- a/Library/Homebrew/test/ENV_spec.rb
+++ b/Library/Homebrew/test/ENV_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/test/PATH_spec.rb b/Library/Homebrew/test/PATH_spec.rb
index eda4461f6..68357d4b8 100644
--- a/Library/Homebrew/test/PATH_spec.rb
+++ b/Library/Homebrew/test/PATH_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "PATH"
diff --git a/Library/Homebrew/test/bash_spec.rb b/Library/Homebrew/test/bash_spec.rb
index b3b552249..3a7827c85 100644
--- a/Library/Homebrew/test/bash_spec.rb
+++ b/Library/Homebrew/test/bash_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/test/bintray_spec.rb b/Library/Homebrew/test/bintray_spec.rb
index 2a61f8d47..6163265a8 100644
--- a/Library/Homebrew/test/bintray_spec.rb
+++ b/Library/Homebrew/test/bintray_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "bintray"
diff --git a/Library/Homebrew/test/bottle_filename_spec.rb b/Library/Homebrew/test/bottle_filename_spec.rb
index f7db07f96..7d95739ea 100644
--- a/Library/Homebrew/test/bottle_filename_spec.rb
+++ b/Library/Homebrew/test/bottle_filename_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/build_environment_spec.rb b/Library/Homebrew/test/build_environment_spec.rb
index e5bc95da3..79f8a57e8 100644
--- a/Library/Homebrew/test/build_environment_spec.rb
+++ b/Library/Homebrew/test/build_environment_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "build_environment"
diff --git a/Library/Homebrew/test/build_options_spec.rb b/Library/Homebrew/test/build_options_spec.rb
index 8bfede1f2..f7693171f 100644
--- a/Library/Homebrew/test/build_options_spec.rb
+++ b/Library/Homebrew/test/build_options_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "build_options"
diff --git a/Library/Homebrew/test/cache_store_spec.rb b/Library/Homebrew/test/cache_store_spec.rb
index 0365b3423..2b122fed4 100644
--- a/Library/Homebrew/test/cache_store_spec.rb
+++ b/Library/Homebrew/test/cache_store_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cache_store"
diff --git a/Library/Homebrew/test/cask/artifact/alt_target_spec.rb b/Library/Homebrew/test/cask/artifact/alt_target_spec.rb
index ed0e9d459..a31554950 100644
--- a/Library/Homebrew/test/cask/artifact/alt_target_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/alt_target_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::App, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/app_spec.rb b/Library/Homebrew/test/cask/artifact/app_spec.rb
index add9b9dc5..4cb1ad17f 100644
--- a/Library/Homebrew/test/cask/artifact/app_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/app_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::App, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/binary_spec.rb b/Library/Homebrew/test/cask/artifact/binary_spec.rb
index 230046770..149eea835 100644
--- a/Library/Homebrew/test/cask/artifact/binary_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/binary_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::Binary, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/generic_artifact_spec.rb b/Library/Homebrew/test/cask/artifact/generic_artifact_spec.rb
index d783a48b4..67420059c 100644
--- a/Library/Homebrew/test/cask/artifact/generic_artifact_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/generic_artifact_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::Artifact, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/installer_spec.rb b/Library/Homebrew/test/cask/artifact/installer_spec.rb
index 6bff500bb..1feb89339 100644
--- a/Library/Homebrew/test/cask/artifact/installer_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/installer_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::Installer, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/manpage_spec.rb b/Library/Homebrew/test/cask/artifact/manpage_spec.rb
index e94e9a8ce..5cfacd2b2 100644
--- a/Library/Homebrew/test/cask/artifact/manpage_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/manpage_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::Manpage, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/pkg_spec.rb b/Library/Homebrew/test/cask/artifact/pkg_spec.rb
index 19087acd9..49ae668d9 100644
--- a/Library/Homebrew/test/cask/artifact/pkg_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/pkg_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::Pkg, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/postflight_block_spec.rb b/Library/Homebrew/test/cask/artifact/postflight_block_spec.rb
index 52cd1bf0c..21957b37d 100644
--- a/Library/Homebrew/test/cask/artifact/postflight_block_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/postflight_block_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::PostflightBlock, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/preflight_block_spec.rb b/Library/Homebrew/test/cask/artifact/preflight_block_spec.rb
index 7546690b0..543ff90b4 100644
--- a/Library/Homebrew/test/cask/artifact/preflight_block_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/preflight_block_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::PreflightBlock, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb b/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb
index 49d86dae2..fc91356cf 100644
--- a/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb
+++ b/Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "benchmark"
diff --git a/Library/Homebrew/test/cask/artifact/suite_spec.rb b/Library/Homebrew/test/cask/artifact/suite_spec.rb
index 7cf983f05..61144b367 100644
--- a/Library/Homebrew/test/cask/artifact/suite_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/suite_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::Suite, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/two_apps_correct_spec.rb b/Library/Homebrew/test/cask/artifact/two_apps_correct_spec.rb
index 1f6308385..3a5371e3b 100644
--- a/Library/Homebrew/test/cask/artifact/two_apps_correct_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/two_apps_correct_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::App, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/uninstall_no_zap_spec.rb b/Library/Homebrew/test/cask/artifact/uninstall_no_zap_spec.rb
index ae2cce3f9..31b14aa7f 100644
--- a/Library/Homebrew/test/cask/artifact/uninstall_no_zap_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/uninstall_no_zap_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Artifact::Zap, :cask do
diff --git a/Library/Homebrew/test/cask/artifact/uninstall_spec.rb b/Library/Homebrew/test/cask/artifact/uninstall_spec.rb
index cd50589dc..7ce9297f4 100644
--- a/Library/Homebrew/test/cask/artifact/uninstall_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/uninstall_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/uninstall_zap"
diff --git a/Library/Homebrew/test/cask/artifact/zap_spec.rb b/Library/Homebrew/test/cask/artifact/zap_spec.rb
index 0f1e7da7d..1013d9fd4 100644
--- a/Library/Homebrew/test/cask/artifact/zap_spec.rb
+++ b/Library/Homebrew/test/cask/artifact/zap_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/uninstall_zap"
diff --git a/Library/Homebrew/test/cask/audit_spec.rb b/Library/Homebrew/test/cask/audit_spec.rb
index 6b0f9f4a3..497780f47 100644
--- a/Library/Homebrew/test/cask/audit_spec.rb
+++ b/Library/Homebrew/test/cask/audit_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/audit"
diff --git a/Library/Homebrew/test/cask/cask_loader/from__path_loader_spec.rb b/Library/Homebrew/test/cask/cask_loader/from__path_loader_spec.rb
index 86fa8061e..297a2ab32 100644
--- a/Library/Homebrew/test/cask/cask_loader/from__path_loader_spec.rb
+++ b/Library/Homebrew/test/cask/cask_loader/from__path_loader_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::CaskLoader::FromPathLoader do
diff --git a/Library/Homebrew/test/cask/cask_loader/from_content_loader_spec.rb b/Library/Homebrew/test/cask/cask_loader/from_content_loader_spec.rb
index 41836b9a1..c956d089e 100644
--- a/Library/Homebrew/test/cask/cask_loader/from_content_loader_spec.rb
+++ b/Library/Homebrew/test/cask/cask_loader/from_content_loader_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::CaskLoader::FromContentLoader do
diff --git a/Library/Homebrew/test/cask/cask_loader/from_uri_loader_spec.rb b/Library/Homebrew/test/cask/cask_loader/from_uri_loader_spec.rb
index cb8e02152..c1708d694 100644
--- a/Library/Homebrew/test/cask/cask_loader/from_uri_loader_spec.rb
+++ b/Library/Homebrew/test/cask/cask_loader/from_uri_loader_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::CaskLoader::FromURILoader do
diff --git a/Library/Homebrew/test/cask/cask_spec.rb b/Library/Homebrew/test/cask/cask_spec.rb
index b0ca9658f..6badf576a 100644
--- a/Library/Homebrew/test/cask/cask_spec.rb
+++ b/Library/Homebrew/test/cask/cask_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Cask, :cask do
diff --git a/Library/Homebrew/test/cask/cmd/audit_spec.rb b/Library/Homebrew/test/cask/cmd/audit_spec.rb
index 18f2fc162..2a1bd90fc 100644
--- a/Library/Homebrew/test/cask/cmd/audit_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/audit_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/invalid_option"
diff --git a/Library/Homebrew/test/cask/cmd/cache_spec.rb b/Library/Homebrew/test/cask/cmd/cache_spec.rb
index 229edcc59..5cde00d82 100644
--- a/Library/Homebrew/test/cask/cmd/cache_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/cache_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/cat_spec.rb b/Library/Homebrew/test/cask/cmd/cat_spec.rb
index 645e666ca..6fab5cc17 100644
--- a/Library/Homebrew/test/cask/cmd/cat_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/cat_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/create_spec.rb b/Library/Homebrew/test/cask/cmd/create_spec.rb
index d0f033463..d8fa5cb42 100644
--- a/Library/Homebrew/test/cask/cmd/create_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/create_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/doctor_spec.rb b/Library/Homebrew/test/cask/cmd/doctor_spec.rb
index 5351f93e5..1f913b670 100644
--- a/Library/Homebrew/test/cask/cmd/doctor_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/doctor_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/invalid_option"
diff --git a/Library/Homebrew/test/cask/cmd/edit_spec.rb b/Library/Homebrew/test/cask/cmd/edit_spec.rb
index e6a7d8fd1..18d390ee7 100644
--- a/Library/Homebrew/test/cask/cmd/edit_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/edit_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/fetch_spec.rb b/Library/Homebrew/test/cask/cmd/fetch_spec.rb
index 35ecf6331..bc68dc9ec 100644
--- a/Library/Homebrew/test/cask/cmd/fetch_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/fetch_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/home_spec.rb b/Library/Homebrew/test/cask/cmd/home_spec.rb
index f94229f27..5774a6d59 100644
--- a/Library/Homebrew/test/cask/cmd/home_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/home_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/invalid_option"
diff --git a/Library/Homebrew/test/cask/cmd/info_spec.rb b/Library/Homebrew/test/cask/cmd/info_spec.rb
index 3828d4d95..3022fc323 100644
--- a/Library/Homebrew/test/cask/cmd/info_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/info_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/install_spec.rb b/Library/Homebrew/test/cask/cmd/install_spec.rb
index 585d7ac84..7c051d9d1 100644
--- a/Library/Homebrew/test/cask/cmd/install_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/install_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/internal_stanza_spec.rb b/Library/Homebrew/test/cask/cmd/internal_stanza_spec.rb
index cffb1f780..9fe4fbd77 100644
--- a/Library/Homebrew/test/cask/cmd/internal_stanza_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/internal_stanza_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Cmd::InternalStanza, :cask do
diff --git a/Library/Homebrew/test/cask/cmd/list_spec.rb b/Library/Homebrew/test/cask/cmd/list_spec.rb
index 5ae6ed8f1..1dfa41695 100644
--- a/Library/Homebrew/test/cask/cmd/list_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/list_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/invalid_option"
diff --git a/Library/Homebrew/test/cask/cmd/outdated_spec.rb b/Library/Homebrew/test/cask/cmd/outdated_spec.rb
index 2ae1624b3..6850fd749 100644
--- a/Library/Homebrew/test/cask/cmd/outdated_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/outdated_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/invalid_option"
diff --git a/Library/Homebrew/test/cask/cmd/reinstall_spec.rb b/Library/Homebrew/test/cask/cmd/reinstall_spec.rb
index ccd7317e6..8b93c92fc 100644
--- a/Library/Homebrew/test/cask/cmd/reinstall_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/reinstall_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/invalid_option"
diff --git a/Library/Homebrew/test/cask/cmd/shared_examples/invalid_option.rb b/Library/Homebrew/test/cask/cmd/shared_examples/invalid_option.rb
index 467a1be08..f344ba770 100644
--- a/Library/Homebrew/test/cask/cmd/shared_examples/invalid_option.rb
+++ b/Library/Homebrew/test/cask/cmd/shared_examples/invalid_option.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 shared_examples "a command that handles invalid options" do
diff --git a/Library/Homebrew/test/cask/cmd/shared_examples/requires_cask_token.rb b/Library/Homebrew/test/cask/cmd/shared_examples/requires_cask_token.rb
index 0e68acc85..a3faaff58 100644
--- a/Library/Homebrew/test/cask/cmd/shared_examples/requires_cask_token.rb
+++ b/Library/Homebrew/test/cask/cmd/shared_examples/requires_cask_token.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 shared_examples "a command that requires a Cask token" do
diff --git a/Library/Homebrew/test/cask/cmd/style_spec.rb b/Library/Homebrew/test/cask/cmd/style_spec.rb
index 32ce90aa2..7862cfd51 100644
--- a/Library/Homebrew/test/cask/cmd/style_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/style_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/test/cask/cmd/uninstall_spec.rb b/Library/Homebrew/test/cask/cmd/uninstall_spec.rb
index f5c330615..8158d1c11 100644
--- a/Library/Homebrew/test/cask/cmd/uninstall_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/uninstall_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd/upgrade_spec.rb b/Library/Homebrew/test/cask/cmd/upgrade_spec.rb
index 3a9137657..e930e00b7 100644
--- a/Library/Homebrew/test/cask/cmd/upgrade_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/upgrade_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/invalid_option"
diff --git a/Library/Homebrew/test/cask/cmd/zap_spec.rb b/Library/Homebrew/test/cask/cmd/zap_spec.rb
index 66d90c58a..f5549f6f9 100644
--- a/Library/Homebrew/test/cask/cmd/zap_spec.rb
+++ b/Library/Homebrew/test/cask/cmd/zap_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples/requires_cask_token"
diff --git a/Library/Homebrew/test/cask/cmd_spec.rb b/Library/Homebrew/test/cask/cmd_spec.rb
index e715d0567..d034437fc 100644
--- a/Library/Homebrew/test/cask/cmd_spec.rb
+++ b/Library/Homebrew/test/cask/cmd_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Cmd, :cask do
diff --git a/Library/Homebrew/test/cask/config_spec.rb b/Library/Homebrew/test/cask/config_spec.rb
index 412d5f5b8..86cd91167 100644
--- a/Library/Homebrew/test/cask/config_spec.rb
+++ b/Library/Homebrew/test/cask/config_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Config, :cask do
diff --git a/Library/Homebrew/test/cask/conflicts_with_spec.rb b/Library/Homebrew/test/cask/conflicts_with_spec.rb
index 059685af3..71733db4b 100644
--- a/Library/Homebrew/test/cask/conflicts_with_spec.rb
+++ b/Library/Homebrew/test/cask/conflicts_with_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "conflicts_with", :cask do
diff --git a/Library/Homebrew/test/cask/denylist_spec.rb b/Library/Homebrew/test/cask/denylist_spec.rb
index 8c34b5988..65fc182c1 100644
--- a/Library/Homebrew/test/cask/denylist_spec.rb
+++ b/Library/Homebrew/test/cask/denylist_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/denylist"
diff --git a/Library/Homebrew/test/cask/depends_on_spec.rb b/Library/Homebrew/test/cask/depends_on_spec.rb
index d9424987d..e00f472d2 100644
--- a/Library/Homebrew/test/cask/depends_on_spec.rb
+++ b/Library/Homebrew/test/cask/depends_on_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # TODO: this test should be named after the corresponding class, once
diff --git a/Library/Homebrew/test/cask/dsl/appcast_spec.rb b/Library/Homebrew/test/cask/dsl/appcast_spec.rb
index a3b1cf671..ac7c1f664 100644
--- a/Library/Homebrew/test/cask/dsl/appcast_spec.rb
+++ b/Library/Homebrew/test/cask/dsl/appcast_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/cask"
diff --git a/Library/Homebrew/test/cask/dsl/caveats_spec.rb b/Library/Homebrew/test/cask/dsl/caveats_spec.rb
index 3b14811f7..a9b3919a4 100644
--- a/Library/Homebrew/test/cask/dsl/caveats_spec.rb
+++ b/Library/Homebrew/test/cask/dsl/caveats_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/cask/dsl/shared_examples/base"
diff --git a/Library/Homebrew/test/cask/dsl/postflight_spec.rb b/Library/Homebrew/test/cask/dsl/postflight_spec.rb
index edb411f31..259921fce 100644
--- a/Library/Homebrew/test/cask/dsl/postflight_spec.rb
+++ b/Library/Homebrew/test/cask/dsl/postflight_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/cask/dsl/shared_examples/base"
diff --git a/Library/Homebrew/test/cask/dsl/preflight_spec.rb b/Library/Homebrew/test/cask/dsl/preflight_spec.rb
index caf977f52..93f1a6017 100644
--- a/Library/Homebrew/test/cask/dsl/preflight_spec.rb
+++ b/Library/Homebrew/test/cask/dsl/preflight_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/cask/dsl/shared_examples/base"
diff --git a/Library/Homebrew/test/cask/dsl/shared_examples/base.rb b/Library/Homebrew/test/cask/dsl/shared_examples/base.rb
index c46715d51..f97d2c29d 100644
--- a/Library/Homebrew/test/cask/dsl/shared_examples/base.rb
+++ b/Library/Homebrew/test/cask/dsl/shared_examples/base.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/dsl/base"
diff --git a/Library/Homebrew/test/cask/dsl/shared_examples/staged.rb b/Library/Homebrew/test/cask/dsl/shared_examples/staged.rb
index a4d29f84c..b6490e825 100644
--- a/Library/Homebrew/test/cask/dsl/shared_examples/staged.rb
+++ b/Library/Homebrew/test/cask/dsl/shared_examples/staged.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/staged"
diff --git a/Library/Homebrew/test/cask/dsl/uninstall_postflight_spec.rb b/Library/Homebrew/test/cask/dsl/uninstall_postflight_spec.rb
index 77129641a..48c7653d5 100644
--- a/Library/Homebrew/test/cask/dsl/uninstall_postflight_spec.rb
+++ b/Library/Homebrew/test/cask/dsl/uninstall_postflight_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/cask/dsl/shared_examples/base"
diff --git a/Library/Homebrew/test/cask/dsl/uninstall_preflight_spec.rb b/Library/Homebrew/test/cask/dsl/uninstall_preflight_spec.rb
index fa744f248..635c35c03 100644
--- a/Library/Homebrew/test/cask/dsl/uninstall_preflight_spec.rb
+++ b/Library/Homebrew/test/cask/dsl/uninstall_preflight_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/cask/dsl/shared_examples/base"
diff --git a/Library/Homebrew/test/cask/dsl/version_spec.rb b/Library/Homebrew/test/cask/dsl/version_spec.rb
index cd1683aed..12f5db7da 100644
--- a/Library/Homebrew/test/cask/dsl/version_spec.rb
+++ b/Library/Homebrew/test/cask/dsl/version_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::DSL::Version, :cask do
diff --git a/Library/Homebrew/test/cask/dsl_spec.rb b/Library/Homebrew/test/cask/dsl_spec.rb
index 0ef599322..43f7dea99 100644
--- a/Library/Homebrew/test/cask/dsl_spec.rb
+++ b/Library/Homebrew/test/cask/dsl_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::DSL, :cask do
diff --git a/Library/Homebrew/test/cask/installer_spec.rb b/Library/Homebrew/test/cask/installer_spec.rb
index a7b5045bd..b15bf205c 100644
--- a/Library/Homebrew/test/cask/installer_spec.rb
+++ b/Library/Homebrew/test/cask/installer_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Installer, :cask do
diff --git a/Library/Homebrew/test/cask/macos_spec.rb b/Library/Homebrew/test/cask/macos_spec.rb
index 2635e67f1..92f5c332e 100644
--- a/Library/Homebrew/test/cask/macos_spec.rb
+++ b/Library/Homebrew/test/cask/macos_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe MacOS, :cask do
diff --git a/Library/Homebrew/test/cask/pkg_spec.rb b/Library/Homebrew/test/cask/pkg_spec.rb
index 486ab8f82..e98face38 100644
--- a/Library/Homebrew/test/cask/pkg_spec.rb
+++ b/Library/Homebrew/test/cask/pkg_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Cask::Pkg, :cask do
diff --git a/Library/Homebrew/test/cask/quarantine_spec.rb b/Library/Homebrew/test/cask/quarantine_spec.rb
index 33c8f7a97..779c995eb 100644
--- a/Library/Homebrew/test/cask/quarantine_spec.rb
+++ b/Library/Homebrew/test/cask/quarantine_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cmd/audit"
diff --git a/Library/Homebrew/test/cask/verify_spec.rb b/Library/Homebrew/test/cask/verify_spec.rb
index 46ce8ad5d..8acc50bae 100644
--- a/Library/Homebrew/test/cask/verify_spec.rb
+++ b/Library/Homebrew/test/cask/verify_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Cask
diff --git a/Library/Homebrew/test/cask_dependent_spec.rb b/Library/Homebrew/test/cask_dependent_spec.rb
index 313a67a61..9f094157e 100644
--- a/Library/Homebrew/test/cask_dependent_spec.rb
+++ b/Library/Homebrew/test/cask_dependent_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cask_loader"
diff --git a/Library/Homebrew/test/caveats_spec.rb b/Library/Homebrew/test/caveats_spec.rb
index b0ed28814..6423eefed 100644
--- a/Library/Homebrew/test/caveats_spec.rb
+++ b/Library/Homebrew/test/caveats_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/checksum_spec.rb b/Library/Homebrew/test/checksum_spec.rb
index 7dc894581..7904eca06 100644
--- a/Library/Homebrew/test/checksum_spec.rb
+++ b/Library/Homebrew/test/checksum_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "checksum"
diff --git a/Library/Homebrew/test/checksum_verification_spec.rb b/Library/Homebrew/test/checksum_verification_spec.rb
index 7f3109ca4..b1a7a7f62 100644
--- a/Library/Homebrew/test/checksum_verification_spec.rb
+++ b/Library/Homebrew/test/checksum_verification_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/cleaner_spec.rb b/Library/Homebrew/test/cleaner_spec.rb
index bba23b7b8..f3ec58552 100644
--- a/Library/Homebrew/test/cleaner_spec.rb
+++ b/Library/Homebrew/test/cleaner_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cleaner"
diff --git a/Library/Homebrew/test/cleanup_spec.rb b/Library/Homebrew/test/cleanup_spec.rb
index cb15b9cb1..f8c363ad4 100644
--- a/Library/Homebrew/test/cleanup_spec.rb
+++ b/Library/Homebrew/test/cleanup_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/support/fixtures/testball"
diff --git a/Library/Homebrew/test/cli/named_args_spec.rb b/Library/Homebrew/test/cli/named_args_spec.rb
index b70a67acc..29af7187e 100644
--- a/Library/Homebrew/test/cli/named_args_spec.rb
+++ b/Library/Homebrew/test/cli/named_args_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/named_args"
diff --git a/Library/Homebrew/test/cli/parser_spec.rb b/Library/Homebrew/test/cli/parser_spec.rb
index 0b6ce6e42..d678b332c 100644
--- a/Library/Homebrew/test/cli/parser_spec.rb
+++ b/Library/Homebrew/test/cli/parser_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "../../cli/parser"
diff --git a/Library/Homebrew/test/cmd/--cache_spec.rb b/Library/Homebrew/test/cmd/--cache_spec.rb
index ea8c263fc..6f8acbb94 100644
--- a/Library/Homebrew/test/cmd/--cache_spec.rb
+++ b/Library/Homebrew/test/cmd/--cache_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/--caskroom_spec.rb b/Library/Homebrew/test/cmd/--caskroom_spec.rb
index 058573ac0..769d95544 100644
--- a/Library/Homebrew/test/cmd/--caskroom_spec.rb
+++ b/Library/Homebrew/test/cmd/--caskroom_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "brew --caskroom", :integration_test do
diff --git a/Library/Homebrew/test/cmd/--cellar_spec.rb b/Library/Homebrew/test/cmd/--cellar_spec.rb
index 5919a2f6a..1bda2bd9f 100644
--- a/Library/Homebrew/test/cmd/--cellar_spec.rb
+++ b/Library/Homebrew/test/cmd/--cellar_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/--env_spec.rb b/Library/Homebrew/test/cmd/--env_spec.rb
index 2f94f1310..d7cd44dbc 100644
--- a/Library/Homebrew/test/cmd/--env_spec.rb
+++ b/Library/Homebrew/test/cmd/--env_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/--prefix_spec.rb b/Library/Homebrew/test/cmd/--prefix_spec.rb
index 51c34fe22..527581f5f 100644
--- a/Library/Homebrew/test/cmd/--prefix_spec.rb
+++ b/Library/Homebrew/test/cmd/--prefix_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/--repository_spec.rb b/Library/Homebrew/test/cmd/--repository_spec.rb
index a6d351d90..cb2f75024 100644
--- a/Library/Homebrew/test/cmd/--repository_spec.rb
+++ b/Library/Homebrew/test/cmd/--repository_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/--version_spec.rb b/Library/Homebrew/test/cmd/--version_spec.rb
index 3650b7d44..7d9d71cd8 100644
--- a/Library/Homebrew/test/cmd/--version_spec.rb
+++ b/Library/Homebrew/test/cmd/--version_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/analytics_spec.rb b/Library/Homebrew/test/cmd/analytics_spec.rb
index 4c15cbe96..519f366c4 100644
--- a/Library/Homebrew/test/cmd/analytics_spec.rb
+++ b/Library/Homebrew/test/cmd/analytics_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/bundle_spec.rb b/Library/Homebrew/test/cmd/bundle_spec.rb
index 63bb8f509..7021ea70e 100644
--- a/Library/Homebrew/test/cmd/bundle_spec.rb
+++ b/Library/Homebrew/test/cmd/bundle_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "brew bundle", :integration_test do
diff --git a/Library/Homebrew/test/cmd/cask_spec.rb b/Library/Homebrew/test/cmd/cask_spec.rb
index 675ac09e9..666854d97 100644
--- a/Library/Homebrew/test/cmd/cask_spec.rb
+++ b/Library/Homebrew/test/cmd/cask_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "brew cask", :integration_test, :needs_macos, :needs_network do
diff --git a/Library/Homebrew/test/cmd/cleanup_spec.rb b/Library/Homebrew/test/cmd/cleanup_spec.rb
index 54d66f74e..437f8a627 100644
--- a/Library/Homebrew/test/cmd/cleanup_spec.rb
+++ b/Library/Homebrew/test/cmd/cleanup_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/commands_spec.rb b/Library/Homebrew/test/cmd/commands_spec.rb
index 8dde1ed83..fb049969e 100644
--- a/Library/Homebrew/test/cmd/commands_spec.rb
+++ b/Library/Homebrew/test/cmd/commands_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/commands"
diff --git a/Library/Homebrew/test/cmd/config_spec.rb b/Library/Homebrew/test/cmd/config_spec.rb
index 2c454e14d..df5bed791 100644
--- a/Library/Homebrew/test/cmd/config_spec.rb
+++ b/Library/Homebrew/test/cmd/config_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/custom-external-command_spec.rb b/Library/Homebrew/test/cmd/custom-external-command_spec.rb
index b6aedd83e..84e735de6 100644
--- a/Library/Homebrew/test/cmd/custom-external-command_spec.rb
+++ b/Library/Homebrew/test/cmd/custom-external-command_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "brew custom-external-command", :integration_test do
diff --git a/Library/Homebrew/test/cmd/deps_spec.rb b/Library/Homebrew/test/cmd/deps_spec.rb
index f63454712..540b82c51 100644
--- a/Library/Homebrew/test/cmd/deps_spec.rb
+++ b/Library/Homebrew/test/cmd/deps_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/desc_spec.rb b/Library/Homebrew/test/cmd/desc_spec.rb
index 356484226..c9e7898dc 100644
--- a/Library/Homebrew/test/cmd/desc_spec.rb
+++ b/Library/Homebrew/test/cmd/desc_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/doctor_spec.rb b/Library/Homebrew/test/cmd/doctor_spec.rb
index eea6caab7..3d0bb6020 100644
--- a/Library/Homebrew/test/cmd/doctor_spec.rb
+++ b/Library/Homebrew/test/cmd/doctor_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/fetch_spec.rb b/Library/Homebrew/test/cmd/fetch_spec.rb
index a49cbfd8e..237a769b3 100644
--- a/Library/Homebrew/test/cmd/fetch_spec.rb
+++ b/Library/Homebrew/test/cmd/fetch_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/gist-logs_spec.rb b/Library/Homebrew/test/cmd/gist-logs_spec.rb
index 490373c7d..10a9d0d30 100644
--- a/Library/Homebrew/test/cmd/gist-logs_spec.rb
+++ b/Library/Homebrew/test/cmd/gist-logs_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/help_spec.rb b/Library/Homebrew/test/cmd/help_spec.rb
index b94d8a7ef..4d0cf035d 100644
--- a/Library/Homebrew/test/cmd/help_spec.rb
+++ b/Library/Homebrew/test/cmd/help_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "brew", :integration_test do
diff --git a/Library/Homebrew/test/cmd/home_spec.rb b/Library/Homebrew/test/cmd/home_spec.rb
index 7fce3ed4b..f0bdd9810 100644
--- a/Library/Homebrew/test/cmd/home_spec.rb
+++ b/Library/Homebrew/test/cmd/home_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/info_spec.rb b/Library/Homebrew/test/cmd/info_spec.rb
index 668548fb7..d2276fdb7 100644
--- a/Library/Homebrew/test/cmd/info_spec.rb
+++ b/Library/Homebrew/test/cmd/info_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/info"
diff --git a/Library/Homebrew/test/cmd/install_spec.rb b/Library/Homebrew/test/cmd/install_spec.rb
index 70ba941c7..ef100add4 100644
--- a/Library/Homebrew/test/cmd/install_spec.rb
+++ b/Library/Homebrew/test/cmd/install_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/leaves_spec.rb b/Library/Homebrew/test/cmd/leaves_spec.rb
index ee56b3cbe..4962a7560 100644
--- a/Library/Homebrew/test/cmd/leaves_spec.rb
+++ b/Library/Homebrew/test/cmd/leaves_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/link_spec.rb b/Library/Homebrew/test/cmd/link_spec.rb
index 67748ae13..650fbb046 100644
--- a/Library/Homebrew/test/cmd/link_spec.rb
+++ b/Library/Homebrew/test/cmd/link_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/list_spec.rb b/Library/Homebrew/test/cmd/list_spec.rb
index e12a8522d..ff438b222 100644
--- a/Library/Homebrew/test/cmd/list_spec.rb
+++ b/Library/Homebrew/test/cmd/list_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/log_spec.rb b/Library/Homebrew/test/cmd/log_spec.rb
index 7ed48a2d1..d989c260f 100644
--- a/Library/Homebrew/test/cmd/log_spec.rb
+++ b/Library/Homebrew/test/cmd/log_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/migrate_spec.rb b/Library/Homebrew/test/cmd/migrate_spec.rb
index 8c8faee07..fce895471 100644
--- a/Library/Homebrew/test/cmd/migrate_spec.rb
+++ b/Library/Homebrew/test/cmd/migrate_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/missing_spec.rb b/Library/Homebrew/test/cmd/missing_spec.rb
index 8f5a3382f..0a5a6bb7b 100644
--- a/Library/Homebrew/test/cmd/missing_spec.rb
+++ b/Library/Homebrew/test/cmd/missing_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/options_spec.rb b/Library/Homebrew/test/cmd/options_spec.rb
index 655c3fa0e..9a3b49516 100644
--- a/Library/Homebrew/test/cmd/options_spec.rb
+++ b/Library/Homebrew/test/cmd/options_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/outdated_spec.rb b/Library/Homebrew/test/cmd/outdated_spec.rb
index ade971720..ba4becf50 100644
--- a/Library/Homebrew/test/cmd/outdated_spec.rb
+++ b/Library/Homebrew/test/cmd/outdated_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/pin_spec.rb b/Library/Homebrew/test/cmd/pin_spec.rb
index a34a3e21c..ad42715a3 100644
--- a/Library/Homebrew/test/cmd/pin_spec.rb
+++ b/Library/Homebrew/test/cmd/pin_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/postinstall_spec.rb b/Library/Homebrew/test/cmd/postinstall_spec.rb
index ed676f558..9be2e1288 100644
--- a/Library/Homebrew/test/cmd/postinstall_spec.rb
+++ b/Library/Homebrew/test/cmd/postinstall_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/readall_spec.rb b/Library/Homebrew/test/cmd/readall_spec.rb
index 245f1fde6..046a8cbf4 100644
--- a/Library/Homebrew/test/cmd/readall_spec.rb
+++ b/Library/Homebrew/test/cmd/readall_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/reinstall_spec.rb b/Library/Homebrew/test/cmd/reinstall_spec.rb
index 45b5a48ff..f88fd0d3d 100644
--- a/Library/Homebrew/test/cmd/reinstall_spec.rb
+++ b/Library/Homebrew/test/cmd/reinstall_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/ENV"
diff --git a/Library/Homebrew/test/cmd/search_spec.rb b/Library/Homebrew/test/cmd/search_spec.rb
index 43b1cf9a3..724a3ff0b 100644
--- a/Library/Homebrew/test/cmd/search_spec.rb
+++ b/Library/Homebrew/test/cmd/search_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/search"
diff --git a/Library/Homebrew/test/cmd/services_spec.rb b/Library/Homebrew/test/cmd/services_spec.rb
index decee40fa..65d00d5d7 100644
--- a/Library/Homebrew/test/cmd/services_spec.rb
+++ b/Library/Homebrew/test/cmd/services_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "brew services", :integration_test, :needs_macos, :needs_network do
diff --git a/Library/Homebrew/test/cmd/shared_examples/args_parse.rb b/Library/Homebrew/test/cmd/shared_examples/args_parse.rb
index d8b7873b8..1df6117ad 100644
--- a/Library/Homebrew/test/cmd/shared_examples/args_parse.rb
+++ b/Library/Homebrew/test/cmd/shared_examples/args_parse.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 shared_examples "parseable arguments" do
diff --git a/Library/Homebrew/test/cmd/switch_spec.rb b/Library/Homebrew/test/cmd/switch_spec.rb
index d50f993e4..b568e5300 100644
--- a/Library/Homebrew/test/cmd/switch_spec.rb
+++ b/Library/Homebrew/test/cmd/switch_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/tap-info_spec.rb b/Library/Homebrew/test/cmd/tap-info_spec.rb
index d03ca1784..e2c1bebca 100644
--- a/Library/Homebrew/test/cmd/tap-info_spec.rb
+++ b/Library/Homebrew/test/cmd/tap-info_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/tap_spec.rb b/Library/Homebrew/test/cmd/tap_spec.rb
index c90155e08..e54e91a5f 100644
--- a/Library/Homebrew/test/cmd/tap_spec.rb
+++ b/Library/Homebrew/test/cmd/tap_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/uninstall_spec.rb b/Library/Homebrew/test/cmd/uninstall_spec.rb
index 999d38f54..9d79d3e7d 100644
--- a/Library/Homebrew/test/cmd/uninstall_spec.rb
+++ b/Library/Homebrew/test/cmd/uninstall_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/uninstall"
diff --git a/Library/Homebrew/test/cmd/unlink_spec.rb b/Library/Homebrew/test/cmd/unlink_spec.rb
index 148939316..090a091a0 100644
--- a/Library/Homebrew/test/cmd/unlink_spec.rb
+++ b/Library/Homebrew/test/cmd/unlink_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/unpin_spec.rb b/Library/Homebrew/test/cmd/unpin_spec.rb
index be3faa7c8..e1aa11d67 100644
--- a/Library/Homebrew/test/cmd/unpin_spec.rb
+++ b/Library/Homebrew/test/cmd/unpin_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/untap_spec.rb b/Library/Homebrew/test/cmd/untap_spec.rb
index 7a33683d4..d637d960b 100644
--- a/Library/Homebrew/test/cmd/untap_spec.rb
+++ b/Library/Homebrew/test/cmd/untap_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/update-report_spec.rb b/Library/Homebrew/test/cmd/update-report_spec.rb
index d07353431..548d0e845 100644
--- a/Library/Homebrew/test/cmd/update-report_spec.rb
+++ b/Library/Homebrew/test/cmd/update-report_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/update-report"
diff --git a/Library/Homebrew/test/cmd/upgrade_spec.rb b/Library/Homebrew/test/cmd/upgrade_spec.rb
index 9f139fc05..f03b919a9 100644
--- a/Library/Homebrew/test/cmd/upgrade_spec.rb
+++ b/Library/Homebrew/test/cmd/upgrade_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/cmd/uses_spec.rb b/Library/Homebrew/test/cmd/uses_spec.rb
index 8321777ba..1b1341067 100644
--- a/Library/Homebrew/test/cmd/uses_spec.rb
+++ b/Library/Homebrew/test/cmd/uses_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/commands_spec.rb b/Library/Homebrew/test/commands_spec.rb
index 25f6955c9..b4a672191 100644
--- a/Library/Homebrew/test/commands_spec.rb
+++ b/Library/Homebrew/test/commands_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "commands"
diff --git a/Library/Homebrew/test/compiler_failure_spec.rb b/Library/Homebrew/test/compiler_failure_spec.rb
index 08763e33c..4ec13cc57 100644
--- a/Library/Homebrew/test/compiler_failure_spec.rb
+++ b/Library/Homebrew/test/compiler_failure_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "compilers"
diff --git a/Library/Homebrew/test/compiler_selector_spec.rb b/Library/Homebrew/test/compiler_selector_spec.rb
index f00c58add..a2ab44b94 100644
--- a/Library/Homebrew/test/compiler_selector_spec.rb
+++ b/Library/Homebrew/test/compiler_selector_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "compilers"
diff --git a/Library/Homebrew/test/cxxstdlib_spec.rb b/Library/Homebrew/test/cxxstdlib_spec.rb
index 0cd0b2070..e16af54ec 100644
--- a/Library/Homebrew/test/cxxstdlib_spec.rb
+++ b/Library/Homebrew/test/cxxstdlib_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/dependable_spec.rb b/Library/Homebrew/test/dependable_spec.rb
index 2beb3c457..61b153a3e 100644
--- a/Library/Homebrew/test/dependable_spec.rb
+++ b/Library/Homebrew/test/dependable_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependable"
diff --git a/Library/Homebrew/test/dependencies_helpers_spec.rb b/Library/Homebrew/test/dependencies_helpers_spec.rb
index 4686084bc..4f3ab714d 100644
--- a/Library/Homebrew/test/dependencies_helpers_spec.rb
+++ b/Library/Homebrew/test/dependencies_helpers_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependencies_helpers"
diff --git a/Library/Homebrew/test/dependencies_spec.rb b/Library/Homebrew/test/dependencies_spec.rb
index 07da34497..b9b5ae7c6 100644
--- a/Library/Homebrew/test/dependencies_spec.rb
+++ b/Library/Homebrew/test/dependencies_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependencies"
diff --git a/Library/Homebrew/test/dependency_collector_spec.rb b/Library/Homebrew/test/dependency_collector_spec.rb
index 5bcefadd4..aa673a233 100644
--- a/Library/Homebrew/test/dependency_collector_spec.rb
+++ b/Library/Homebrew/test/dependency_collector_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependency_collector"
diff --git a/Library/Homebrew/test/dependency_expansion_spec.rb b/Library/Homebrew/test/dependency_expansion_spec.rb
index c3a1c4b7e..b0e5b8a6c 100644
--- a/Library/Homebrew/test/dependency_expansion_spec.rb
+++ b/Library/Homebrew/test/dependency_expansion_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependency"
diff --git a/Library/Homebrew/test/dependency_spec.rb b/Library/Homebrew/test/dependency_spec.rb
index ec772097e..3c606c86c 100644
--- a/Library/Homebrew/test/dependency_spec.rb
+++ b/Library/Homebrew/test/dependency_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependency"
diff --git a/Library/Homebrew/test/description_cache_store_spec.rb b/Library/Homebrew/test/description_cache_store_spec.rb
index a5855a9ce..6b16ffb6c 100644
--- a/Library/Homebrew/test/description_cache_store_spec.rb
+++ b/Library/Homebrew/test/description_cache_store_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "description_cache_store"
diff --git a/Library/Homebrew/test/descriptions_spec.rb b/Library/Homebrew/test/descriptions_spec.rb
index 01aa00434..e1afb7ec8 100644
--- a/Library/Homebrew/test/descriptions_spec.rb
+++ b/Library/Homebrew/test/descriptions_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "descriptions"
diff --git a/Library/Homebrew/test/dev-cmd/audit_spec.rb b/Library/Homebrew/test/dev-cmd/audit_spec.rb
index 1f730949a..315066bc5 100644
--- a/Library/Homebrew/test/dev-cmd/audit_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/audit_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dev-cmd/audit"
diff --git a/Library/Homebrew/test/dev-cmd/bottle_spec.rb b/Library/Homebrew/test/dev-cmd/bottle_spec.rb
index 1acbf4480..c524f7d34 100644
--- a/Library/Homebrew/test/dev-cmd/bottle_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/bottle_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/bump-cask-pr_spec.rb b/Library/Homebrew/test/dev-cmd/bump-cask-pr_spec.rb
index 69552cfd7..02ae9e8a9 100644
--- a/Library/Homebrew/test/dev-cmd/bump-cask-pr_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/bump-cask-pr_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/bump-formula-pr_spec.rb b/Library/Homebrew/test/dev-cmd/bump-formula-pr_spec.rb
index 9cdc95f9a..08d090750 100644
--- a/Library/Homebrew/test/dev-cmd/bump-formula-pr_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/bump-formula-pr_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/bump-revision_spec.rb b/Library/Homebrew/test/dev-cmd/bump-revision_spec.rb
index 3d025d0b5..51324ce3e 100644
--- a/Library/Homebrew/test/dev-cmd/bump-revision_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/bump-revision_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/bump_spec.rb b/Library/Homebrew/test/dev-cmd/bump_spec.rb
index 81b22e319..33e4931f7 100644
--- a/Library/Homebrew/test/dev-cmd/bump_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/bump_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/cat_spec.rb b/Library/Homebrew/test/dev-cmd/cat_spec.rb
index 2a9132e76..fdeb97091 100644
--- a/Library/Homebrew/test/dev-cmd/cat_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/cat_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/command_spec.rb b/Library/Homebrew/test/dev-cmd/command_spec.rb
index 1d71661f2..5e6ecdfbe 100644
--- a/Library/Homebrew/test/dev-cmd/command_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/command_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/create_spec.rb b/Library/Homebrew/test/dev-cmd/create_spec.rb
index e4e98c207..54edd4b9e 100644
--- a/Library/Homebrew/test/dev-cmd/create_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/create_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/diy_spec.rb b/Library/Homebrew/test/dev-cmd/diy_spec.rb
index 5168cf552..eafc466f3 100644
--- a/Library/Homebrew/test/dev-cmd/diy_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/diy_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/edit_spec.rb b/Library/Homebrew/test/dev-cmd/edit_spec.rb
index df88019fa..2e8a96ea6 100644
--- a/Library/Homebrew/test/dev-cmd/edit_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/edit_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/extract_spec.rb b/Library/Homebrew/test/dev-cmd/extract_spec.rb
index c12c4eb06..5563f6079 100644
--- a/Library/Homebrew/test/dev-cmd/extract_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/extract_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/formula_spec.rb b/Library/Homebrew/test/dev-cmd/formula_spec.rb
index d9e96bc7b..e52fb8267 100644
--- a/Library/Homebrew/test/dev-cmd/formula_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/formula_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/irb_spec.rb b/Library/Homebrew/test/dev-cmd/irb_spec.rb
index 666374c87..1d39e2d70 100644
--- a/Library/Homebrew/test/dev-cmd/irb_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/irb_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/linkage_spec.rb b/Library/Homebrew/test/dev-cmd/linkage_spec.rb
index f083b5cb6..1663e42c4 100644
--- a/Library/Homebrew/test/dev-cmd/linkage_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/linkage_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/livecheck_spec.rb b/Library/Homebrew/test/dev-cmd/livecheck_spec.rb
index 4bbee4693..9bd0dfee5 100644
--- a/Library/Homebrew/test/dev-cmd/livecheck_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/livecheck_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/man_spec.rb b/Library/Homebrew/test/dev-cmd/man_spec.rb
index 07eab3a25..29523d832 100644
--- a/Library/Homebrew/test/dev-cmd/man_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/man_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/mirror_spec.rb b/Library/Homebrew/test/dev-cmd/mirror_spec.rb
index 4ad0dc02a..bc6af40e2 100644
--- a/Library/Homebrew/test/dev-cmd/mirror_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/mirror_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/pr-automerge_spec.rb b/Library/Homebrew/test/dev-cmd/pr-automerge_spec.rb
index d0230d13a..df6b0ef66 100644
--- a/Library/Homebrew/test/dev-cmd/pr-automerge_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/pr-automerge_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/pr-publish_spec.rb b/Library/Homebrew/test/dev-cmd/pr-publish_spec.rb
index f0b8e25cd..f0021f0f4 100644
--- a/Library/Homebrew/test/dev-cmd/pr-publish_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/pr-publish_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb b/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb
index f11823c52..848323c00 100644
--- a/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dev-cmd/pr-pull"
diff --git a/Library/Homebrew/test/dev-cmd/pr-upload_spec.rb b/Library/Homebrew/test/dev-cmd/pr-upload_spec.rb
index 69a5f27c1..54530b609 100644
--- a/Library/Homebrew/test/dev-cmd/pr-upload_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/pr-upload_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/prof_spec.rb b/Library/Homebrew/test/dev-cmd/prof_spec.rb
index c2dc0b3d4..f4a3990e8 100644
--- a/Library/Homebrew/test/dev-cmd/prof_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/prof_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/release-notes_spec.rb b/Library/Homebrew/test/dev-cmd/release-notes_spec.rb
index bbe9bff87..21d1b2979 100644
--- a/Library/Homebrew/test/dev-cmd/release-notes_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/release-notes_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/ruby_spec.rb b/Library/Homebrew/test/dev-cmd/ruby_spec.rb
index 42bb98c1f..ae13bf021 100644
--- a/Library/Homebrew/test/dev-cmd/ruby_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/ruby_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/sh_spec.rb b/Library/Homebrew/test/dev-cmd/sh_spec.rb
index 52000a549..8fa4a72a0 100644
--- a/Library/Homebrew/test/dev-cmd/sh_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/sh_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/sponsors_spec.rb b/Library/Homebrew/test/dev-cmd/sponsors_spec.rb
index 667dff55b..bee845842 100644
--- a/Library/Homebrew/test/dev-cmd/sponsors_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/sponsors_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/style_spec.rb b/Library/Homebrew/test/dev-cmd/style_spec.rb
index 2c0164c9f..0fb6f90c1 100644
--- a/Library/Homebrew/test/dev-cmd/style_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/style_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/tap-new_spec.rb b/Library/Homebrew/test/dev-cmd/tap-new_spec.rb
index 24e83443a..bbad80d12 100644
--- a/Library/Homebrew/test/dev-cmd/tap-new_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/tap-new_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/test_spec.rb b/Library/Homebrew/test/dev-cmd/test_spec.rb
index 866230a70..81f46c177 100644
--- a/Library/Homebrew/test/dev-cmd/test_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/test_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/typecheck_spec.rb b/Library/Homebrew/test/dev-cmd/typecheck_spec.rb
index 8fef2f67f..31c8c3b7f 100644
--- a/Library/Homebrew/test/dev-cmd/typecheck_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/typecheck_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/unpack_spec.rb b/Library/Homebrew/test/dev-cmd/unpack_spec.rb
index 0a0c27eee..079968691 100644
--- a/Library/Homebrew/test/dev-cmd/unpack_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/unpack_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/update-license-data_spec.rb b/Library/Homebrew/test/dev-cmd/update-license-data_spec.rb
index d9be45780..734ee4545 100644
--- a/Library/Homebrew/test/dev-cmd/update-license-data_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/update-license-data_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/dev-cmd/vendor-gems_spec.rb b/Library/Homebrew/test/dev-cmd/vendor-gems_spec.rb
index ac08d2947..dc6b9b106 100644
--- a/Library/Homebrew/test/dev-cmd/vendor-gems_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/vendor-gems_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
diff --git a/Library/Homebrew/test/diagnostic_checks_spec.rb b/Library/Homebrew/test/diagnostic_checks_spec.rb
index 5fd14791c..bd2c17bec 100644
--- a/Library/Homebrew/test/diagnostic_checks_spec.rb
+++ b/Library/Homebrew/test/diagnostic_checks_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "diagnostic"
diff --git a/Library/Homebrew/test/download_strategies_spec.rb b/Library/Homebrew/test/download_strategies_spec.rb
index 3f5f6c07a..120294835 100644
--- a/Library/Homebrew/test/download_strategies_spec.rb
+++ b/Library/Homebrew/test/download_strategies_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "download_strategy"
diff --git a/Library/Homebrew/test/env_config_spec.rb b/Library/Homebrew/test/env_config_spec.rb
index cdc65adb9..47713b155 100644
--- a/Library/Homebrew/test/env_config_spec.rb
+++ b/Library/Homebrew/test/env_config_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "diagnostic"
diff --git a/Library/Homebrew/test/error_during_execution_spec.rb b/Library/Homebrew/test/error_during_execution_spec.rb
index 513ff7a50..2b9193761 100644
--- a/Library/Homebrew/test/error_during_execution_spec.rb
+++ b/Library/Homebrew/test/error_during_execution_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe ErrorDuringExecution do
diff --git a/Library/Homebrew/test/exceptions_spec.rb b/Library/Homebrew/test/exceptions_spec.rb
index 8bb4266ad..e938c843c 100644
--- a/Library/Homebrew/test/exceptions_spec.rb
+++ b/Library/Homebrew/test/exceptions_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "exceptions"
diff --git a/Library/Homebrew/test/formatter_spec.rb b/Library/Homebrew/test/formatter_spec.rb
index fb348213a..9e8d214f7 100644
--- a/Library/Homebrew/test/formatter_spec.rb
+++ b/Library/Homebrew/test/formatter_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/formatter"
diff --git a/Library/Homebrew/test/formula_free_port_spec.rb b/Library/Homebrew/test/formula_free_port_spec.rb
index 04320edf5..84412d61d 100644
--- a/Library/Homebrew/test/formula_free_port_spec.rb
+++ b/Library/Homebrew/test/formula_free_port_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "socket"
diff --git a/Library/Homebrew/test/formula_info_spec.rb b/Library/Homebrew/test/formula_info_spec.rb
index 4e1f41652..0e8bcebb1 100644
--- a/Library/Homebrew/test/formula_info_spec.rb
+++ b/Library/Homebrew/test/formula_info_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula_info"
diff --git a/Library/Homebrew/test/formula_installer_bottle_spec.rb b/Library/Homebrew/test/formula_installer_bottle_spec.rb
index 0a6aec0f0..b42513f75 100644
--- a/Library/Homebrew/test/formula_installer_bottle_spec.rb
+++ b/Library/Homebrew/test/formula_installer_bottle_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/formula_installer_spec.rb b/Library/Homebrew/test/formula_installer_spec.rb
index bffafdfe7..0e84ed74a 100644
--- a/Library/Homebrew/test/formula_installer_spec.rb
+++ b/Library/Homebrew/test/formula_installer_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/formula_pin_spec.rb b/Library/Homebrew/test/formula_pin_spec.rb
index 03e83da67..04e371cb4 100644
--- a/Library/Homebrew/test/formula_pin_spec.rb
+++ b/Library/Homebrew/test/formula_pin_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula_pin"
diff --git a/Library/Homebrew/test/formula_spec.rb b/Library/Homebrew/test/formula_spec.rb
index 82ef57195..453fb312d 100644
--- a/Library/Homebrew/test/formula_spec.rb
+++ b/Library/Homebrew/test/formula_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/support/fixtures/testball"
diff --git a/Library/Homebrew/test/formula_spec_selection_spec.rb b/Library/Homebrew/test/formula_spec_selection_spec.rb
index bdaed0ddd..c16c13ad5 100644
--- a/Library/Homebrew/test/formula_spec_selection_spec.rb
+++ b/Library/Homebrew/test/formula_spec_selection_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/formula_support_spec.rb b/Library/Homebrew/test/formula_support_spec.rb
index d20fedddf..6fcd00f43 100644
--- a/Library/Homebrew/test/formula_support_spec.rb
+++ b/Library/Homebrew/test/formula_support_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula_support"
diff --git a/Library/Homebrew/test/formula_validation_spec.rb b/Library/Homebrew/test/formula_validation_spec.rb
index c17820158..30077967f 100644
--- a/Library/Homebrew/test/formula_validation_spec.rb
+++ b/Library/Homebrew/test/formula_validation_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/formulary_spec.rb b/Library/Homebrew/test/formulary_spec.rb
index bbd6aca88..b8ca07410 100644
--- a/Library/Homebrew/test/formulary_spec.rb
+++ b/Library/Homebrew/test/formulary_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/global_spec.rb b/Library/Homebrew/test/global_spec.rb
index 5ae60e666..6c34ca883 100644
--- a/Library/Homebrew/test/global_spec.rb
+++ b/Library/Homebrew/test/global_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "brew", :integration_test do
diff --git a/Library/Homebrew/test/hardware/cpu_spec.rb b/Library/Homebrew/test/hardware/cpu_spec.rb
index 343da4378..f7ea9243e 100644
--- a/Library/Homebrew/test/hardware/cpu_spec.rb
+++ b/Library/Homebrew/test/hardware/cpu_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "hardware"
diff --git a/Library/Homebrew/test/inreplace_spec.rb b/Library/Homebrew/test/inreplace_spec.rb
index 9389c0a31..aa80fddd0 100644
--- a/Library/Homebrew/test/inreplace_spec.rb
+++ b/Library/Homebrew/test/inreplace_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/string"
diff --git a/Library/Homebrew/test/java_requirement_spec.rb b/Library/Homebrew/test/java_requirement_spec.rb
index 590f27a1d..42a065faf 100644
--- a/Library/Homebrew/test/java_requirement_spec.rb
+++ b/Library/Homebrew/test/java_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/test/keg_spec.rb b/Library/Homebrew/test/keg_spec.rb
index 060ceb2d4..4c81962a1 100644
--- a/Library/Homebrew/test/keg_spec.rb
+++ b/Library/Homebrew/test/keg_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "keg"
diff --git a/Library/Homebrew/test/language/go_spec.rb b/Library/Homebrew/test/language/go_spec.rb
index ac631f38c..b2c3212ad 100644
--- a/Library/Homebrew/test/language/go_spec.rb
+++ b/Library/Homebrew/test/language/go_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/go"
diff --git a/Library/Homebrew/test/language/java_spec.rb b/Library/Homebrew/test/language/java_spec.rb
index 217eb792d..4893a272c 100644
--- a/Library/Homebrew/test/language/java_spec.rb
+++ b/Library/Homebrew/test/language/java_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/java"
diff --git a/Library/Homebrew/test/language/node_spec.rb b/Library/Homebrew/test/language/node_spec.rb
index 79c3cf249..3907b96ac 100644
--- a/Library/Homebrew/test/language/node_spec.rb
+++ b/Library/Homebrew/test/language/node_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/node"
diff --git a/Library/Homebrew/test/language/perl/shebang_spec.rb b/Library/Homebrew/test/language/perl/shebang_spec.rb
index 5a59f162b..8dbffe0b4 100644
--- a/Library/Homebrew/test/language/perl/shebang_spec.rb
+++ b/Library/Homebrew/test/language/perl/shebang_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/perl"
diff --git a/Library/Homebrew/test/language/python_spec.rb b/Library/Homebrew/test/language/python_spec.rb
index 174373d99..6fab0b50f 100644
--- a/Library/Homebrew/test/language/python_spec.rb
+++ b/Library/Homebrew/test/language/python_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "language/python"
diff --git a/Library/Homebrew/test/lazy_object_spec.rb b/Library/Homebrew/test/lazy_object_spec.rb
index 57ca637fa..f9520b83c 100644
--- a/Library/Homebrew/test/lazy_object_spec.rb
+++ b/Library/Homebrew/test/lazy_object_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "lazy_object"
diff --git a/Library/Homebrew/test/linkage_cache_store_spec.rb b/Library/Homebrew/test/linkage_cache_store_spec.rb
index 51dec2b1d..9e9c53385 100644
--- a/Library/Homebrew/test/linkage_cache_store_spec.rb
+++ b/Library/Homebrew/test/linkage_cache_store_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "linkage_cache_store"
diff --git a/Library/Homebrew/test/livecheck/livecheck_spec.rb b/Library/Homebrew/test/livecheck/livecheck_spec.rb
index 68d95cf90..5bbd94320 100644
--- a/Library/Homebrew/test/livecheck/livecheck_spec.rb
+++ b/Library/Homebrew/test/livecheck/livecheck_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # Frozen_string_literal: true
 
 require "livecheck/livecheck"
diff --git a/Library/Homebrew/test/livecheck/strategy/apache_spec.rb b/Library/Homebrew/test/livecheck/strategy/apache_spec.rb
index b44ca71ea..7bd4d9ae1 100644
--- a/Library/Homebrew/test/livecheck/strategy/apache_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/apache_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/apache"
diff --git a/Library/Homebrew/test/livecheck/strategy/bitbucket_spec.rb b/Library/Homebrew/test/livecheck/strategy/bitbucket_spec.rb
index 2026d157a..f5c2df857 100644
--- a/Library/Homebrew/test/livecheck/strategy/bitbucket_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/bitbucket_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/bitbucket"
diff --git a/Library/Homebrew/test/livecheck/strategy/git_spec.rb b/Library/Homebrew/test/livecheck/strategy/git_spec.rb
index 366ed3558..9a0996a2d 100644
--- a/Library/Homebrew/test/livecheck/strategy/git_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/git_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/git"
diff --git a/Library/Homebrew/test/livecheck/strategy/gnome_spec.rb b/Library/Homebrew/test/livecheck/strategy/gnome_spec.rb
index 79145e02c..4edf10161 100644
--- a/Library/Homebrew/test/livecheck/strategy/gnome_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/gnome_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/gnome"
diff --git a/Library/Homebrew/test/livecheck/strategy/gnu_spec.rb b/Library/Homebrew/test/livecheck/strategy/gnu_spec.rb
index 82cfc98c7..63e28de01 100644
--- a/Library/Homebrew/test/livecheck/strategy/gnu_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/gnu_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/gnu"
diff --git a/Library/Homebrew/test/livecheck/strategy/hackage_spec.rb b/Library/Homebrew/test/livecheck/strategy/hackage_spec.rb
index 63e3346bd..11a35d7ba 100644
--- a/Library/Homebrew/test/livecheck/strategy/hackage_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/hackage_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/hackage"
diff --git a/Library/Homebrew/test/livecheck/strategy/launchpad_spec.rb b/Library/Homebrew/test/livecheck/strategy/launchpad_spec.rb
index 54630bb5d..150c54778 100644
--- a/Library/Homebrew/test/livecheck/strategy/launchpad_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/launchpad_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/launchpad"
diff --git a/Library/Homebrew/test/livecheck/strategy/npm_spec.rb b/Library/Homebrew/test/livecheck/strategy/npm_spec.rb
index 3bee72489..261243428 100644
--- a/Library/Homebrew/test/livecheck/strategy/npm_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/npm_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/npm"
diff --git a/Library/Homebrew/test/livecheck/strategy/page_match_spec.rb b/Library/Homebrew/test/livecheck/strategy/page_match_spec.rb
index 1b615b246..96bf43ad5 100644
--- a/Library/Homebrew/test/livecheck/strategy/page_match_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/page_match_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/page_match"
diff --git a/Library/Homebrew/test/livecheck/strategy/pypi_spec.rb b/Library/Homebrew/test/livecheck/strategy/pypi_spec.rb
index b8c49817e..e8a4ba1b8 100644
--- a/Library/Homebrew/test/livecheck/strategy/pypi_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/pypi_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/pypi"
diff --git a/Library/Homebrew/test/livecheck/strategy/sourceforge_spec.rb b/Library/Homebrew/test/livecheck/strategy/sourceforge_spec.rb
index 8ca98945a..c37c9cdc2 100644
--- a/Library/Homebrew/test/livecheck/strategy/sourceforge_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/sourceforge_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/sourceforge"
diff --git a/Library/Homebrew/test/livecheck/strategy/xorg_spec.rb b/Library/Homebrew/test/livecheck/strategy/xorg_spec.rb
index 7db151cc7..664797732 100644
--- a/Library/Homebrew/test/livecheck/strategy/xorg_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy/xorg_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy/xorg"
diff --git a/Library/Homebrew/test/livecheck/strategy_spec.rb b/Library/Homebrew/test/livecheck/strategy_spec.rb
index de0869a70..a2480b340 100644
--- a/Library/Homebrew/test/livecheck/strategy_spec.rb
+++ b/Library/Homebrew/test/livecheck/strategy_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "livecheck/strategy"
diff --git a/Library/Homebrew/test/livecheck_spec.rb b/Library/Homebrew/test/livecheck_spec.rb
index e5ed4a57c..84ed8df53 100644
--- a/Library/Homebrew/test/livecheck_spec.rb
+++ b/Library/Homebrew/test/livecheck_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/locale_spec.rb b/Library/Homebrew/test/locale_spec.rb
index 52c0e6aeb..05a433122 100644
--- a/Library/Homebrew/test/locale_spec.rb
+++ b/Library/Homebrew/test/locale_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "locale"
diff --git a/Library/Homebrew/test/lock_file_spec.rb b/Library/Homebrew/test/lock_file_spec.rb
index f9e949648..c8aca6beb 100644
--- a/Library/Homebrew/test/lock_file_spec.rb
+++ b/Library/Homebrew/test/lock_file_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "lock_file"
diff --git a/Library/Homebrew/test/messages_spec.rb b/Library/Homebrew/test/messages_spec.rb
index fa97096d1..aa54d406a 100644
--- a/Library/Homebrew/test/messages_spec.rb
+++ b/Library/Homebrew/test/messages_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "messages"
diff --git a/Library/Homebrew/test/migrator_spec.rb b/Library/Homebrew/test/migrator_spec.rb
index e17a4bf44..1c21b93ab 100644
--- a/Library/Homebrew/test/migrator_spec.rb
+++ b/Library/Homebrew/test/migrator_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "migrator"
diff --git a/Library/Homebrew/test/missing_formula_spec.rb b/Library/Homebrew/test/missing_formula_spec.rb
index 4d88dfedc..14fb5bdcf 100644
--- a/Library/Homebrew/test/missing_formula_spec.rb
+++ b/Library/Homebrew/test/missing_formula_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "missing_formula"
diff --git a/Library/Homebrew/test/options_spec.rb b/Library/Homebrew/test/options_spec.rb
index b864fe662..fa180493f 100644
--- a/Library/Homebrew/test/options_spec.rb
+++ b/Library/Homebrew/test/options_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "options"
diff --git a/Library/Homebrew/test/os/linux/dependency_collector_spec.rb b/Library/Homebrew/test/os/linux/dependency_collector_spec.rb
index b13b458d2..3baab3f2d 100644
--- a/Library/Homebrew/test/os/linux/dependency_collector_spec.rb
+++ b/Library/Homebrew/test/os/linux/dependency_collector_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependency_collector"
diff --git a/Library/Homebrew/test/os/linux/diagnostic_spec.rb b/Library/Homebrew/test/os/linux/diagnostic_spec.rb
index 185eab89a..8c32c8319 100644
--- a/Library/Homebrew/test/os/linux/diagnostic_spec.rb
+++ b/Library/Homebrew/test/os/linux/diagnostic_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "diagnostic"
diff --git a/Library/Homebrew/test/os/linux/formula_spec.rb b/Library/Homebrew/test/os/linux/formula_spec.rb
index 7ef64aecd..806e4a3f7 100644
--- a/Library/Homebrew/test/os/linux/formula_spec.rb
+++ b/Library/Homebrew/test/os/linux/formula_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/support/fixtures/testball"
diff --git a/Library/Homebrew/test/os/linux/pathname_spec.rb b/Library/Homebrew/test/os/linux/pathname_spec.rb
index 7e4126585..cae19a846 100644
--- a/Library/Homebrew/test/os/linux/pathname_spec.rb
+++ b/Library/Homebrew/test/os/linux/pathname_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/pathname"
diff --git a/Library/Homebrew/test/os/mac/dependency_collector_spec.rb b/Library/Homebrew/test/os/mac/dependency_collector_spec.rb
index eacaf971f..eb29d478d 100644
--- a/Library/Homebrew/test/os/mac/dependency_collector_spec.rb
+++ b/Library/Homebrew/test/os/mac/dependency_collector_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "dependency_collector"
diff --git a/Library/Homebrew/test/os/mac/diagnostic_spec.rb b/Library/Homebrew/test/os/mac/diagnostic_spec.rb
index aa44899d5..de6ed4065 100644
--- a/Library/Homebrew/test/os/mac/diagnostic_spec.rb
+++ b/Library/Homebrew/test/os/mac/diagnostic_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "diagnostic"
diff --git a/Library/Homebrew/test/os/mac/formula_spec.rb b/Library/Homebrew/test/os/mac/formula_spec.rb
index 05f15cb80..b33878dc4 100644
--- a/Library/Homebrew/test/os/mac/formula_spec.rb
+++ b/Library/Homebrew/test/os/mac/formula_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "test/support/fixtures/testball"
diff --git a/Library/Homebrew/test/os/mac/java_requirement_spec.rb b/Library/Homebrew/test/os/mac/java_requirement_spec.rb
index 65729b23b..4d83a5889 100644
--- a/Library/Homebrew/test/os/mac/java_requirement_spec.rb
+++ b/Library/Homebrew/test/os/mac/java_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/test/os/mac/keg_spec.rb b/Library/Homebrew/test/os/mac/keg_spec.rb
index b70068c95..6ce7bc075 100644
--- a/Library/Homebrew/test/os/mac/keg_spec.rb
+++ b/Library/Homebrew/test/os/mac/keg_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "keg"
diff --git a/Library/Homebrew/test/os/mac/mach_spec.rb b/Library/Homebrew/test/os/mac/mach_spec.rb
index c10a661f9..1bc6f59f9 100644
--- a/Library/Homebrew/test/os/mac/mach_spec.rb
+++ b/Library/Homebrew/test/os/mac/mach_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "Mach-O Pathname tests" do
diff --git a/Library/Homebrew/test/os/mac/pkgconfig_spec.rb b/Library/Homebrew/test/os/mac/pkgconfig_spec.rb
index fa8a1de35..4b0e2abbb 100644
--- a/Library/Homebrew/test/os/mac/pkgconfig_spec.rb
+++ b/Library/Homebrew/test/os/mac/pkgconfig_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # These tests assume the needed SDKs are correctly installed, i.e. `brew doctor` passes.
diff --git a/Library/Homebrew/test/os/mac/software_spec_spec.rb b/Library/Homebrew/test/os/mac/software_spec_spec.rb
index af94ef6f5..e716a7624 100644
--- a/Library/Homebrew/test/os/mac/software_spec_spec.rb
+++ b/Library/Homebrew/test/os/mac/software_spec_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "software_spec"
diff --git a/Library/Homebrew/test/os/mac/version_spec.rb b/Library/Homebrew/test/os/mac/version_spec.rb
index 3f332ed5a..efd093857 100644
--- a/Library/Homebrew/test/os/mac/version_spec.rb
+++ b/Library/Homebrew/test/os/mac/version_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "version"
diff --git a/Library/Homebrew/test/os/mac_spec.rb b/Library/Homebrew/test/os/mac_spec.rb
index e3c1aa8cb..d7fff66b2 100644
--- a/Library/Homebrew/test/os/mac_spec.rb
+++ b/Library/Homebrew/test/os/mac_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "locale"
diff --git a/Library/Homebrew/test/os/os_spec.rb b/Library/Homebrew/test/os/os_spec.rb
index 1e671f67a..6d6052581 100644
--- a/Library/Homebrew/test/os/os_spec.rb
+++ b/Library/Homebrew/test/os/os_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe OS do
diff --git a/Library/Homebrew/test/patch_spec.rb b/Library/Homebrew/test/patch_spec.rb
index fff1fc48b..1708cd39c 100644
--- a/Library/Homebrew/test/patch_spec.rb
+++ b/Library/Homebrew/test/patch_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "patch"
diff --git a/Library/Homebrew/test/patching_spec.rb b/Library/Homebrew/test/patching_spec.rb
index 737e14067..1259ac7c4 100644
--- a/Library/Homebrew/test/patching_spec.rb
+++ b/Library/Homebrew/test/patching_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formula"
diff --git a/Library/Homebrew/test/pathname_spec.rb b/Library/Homebrew/test/pathname_spec.rb
index fe1bddbaa..383da9fb7 100644
--- a/Library/Homebrew/test/pathname_spec.rb
+++ b/Library/Homebrew/test/pathname_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/pathname"
diff --git a/Library/Homebrew/test/pkg_version_spec.rb b/Library/Homebrew/test/pkg_version_spec.rb
index ee8bedd61..61344d094 100644
--- a/Library/Homebrew/test/pkg_version_spec.rb
+++ b/Library/Homebrew/test/pkg_version_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "pkg_version"
diff --git a/Library/Homebrew/test/requirement_spec.rb b/Library/Homebrew/test/requirement_spec.rb
index ffcb3a8de..018496b03 100644
--- a/Library/Homebrew/test/requirement_spec.rb
+++ b/Library/Homebrew/test/requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/test/requirements/codesign_requirement_spec.rb b/Library/Homebrew/test/requirements/codesign_requirement_spec.rb
index 483104bce..0f22b9f67 100644
--- a/Library/Homebrew/test/requirements/codesign_requirement_spec.rb
+++ b/Library/Homebrew/test/requirements/codesign_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirements/codesign_requirement"
diff --git a/Library/Homebrew/test/requirements/java_requirement_spec.rb b/Library/Homebrew/test/requirements/java_requirement_spec.rb
index 969532d0c..59e4dcc64 100644
--- a/Library/Homebrew/test/requirements/java_requirement_spec.rb
+++ b/Library/Homebrew/test/requirements/java_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirements/java_requirement"
diff --git a/Library/Homebrew/test/requirements/linux_requirement_spec.rb b/Library/Homebrew/test/requirements/linux_requirement_spec.rb
index f328579fa..78167a4d8 100644
--- a/Library/Homebrew/test/requirements/linux_requirement_spec.rb
+++ b/Library/Homebrew/test/requirements/linux_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/test/requirements/macos_requirement_spec.rb b/Library/Homebrew/test/requirements/macos_requirement_spec.rb
index b96611126..488f8c1f0 100644
--- a/Library/Homebrew/test/requirements/macos_requirement_spec.rb
+++ b/Library/Homebrew/test/requirements/macos_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/test/requirements/osxfuse_requirement_spec.rb b/Library/Homebrew/test/requirements/osxfuse_requirement_spec.rb
index 8c38a4588..4b9632a38 100644
--- a/Library/Homebrew/test/requirements/osxfuse_requirement_spec.rb
+++ b/Library/Homebrew/test/requirements/osxfuse_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/test/requirements_spec.rb b/Library/Homebrew/test/requirements_spec.rb
index f20e7bc9e..ae6bfdc2c 100644
--- a/Library/Homebrew/test/requirements_spec.rb
+++ b/Library/Homebrew/test/requirements_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "requirements"
diff --git a/Library/Homebrew/test/resource_spec.rb b/Library/Homebrew/test/resource_spec.rb
index fd4e59101..260bd9c50 100644
--- a/Library/Homebrew/test/resource_spec.rb
+++ b/Library/Homebrew/test/resource_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "resource"
diff --git a/Library/Homebrew/test/rubocop_spec.rb b/Library/Homebrew/test/rubocop_spec.rb
index a5750a430..83ae2ddf6 100644
--- a/Library/Homebrew/test/rubocop_spec.rb
+++ b/Library/Homebrew/test/rubocop_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/test/rubocops/cask/desc_spec.rb b/Library/Homebrew/test/rubocops/cask/desc_spec.rb
index d76d37b6c..633db2e1c 100644
--- a/Library/Homebrew/test/rubocops/cask/desc_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/desc_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/rubocop-cask"
diff --git a/Library/Homebrew/test/rubocops/cask/homepage_matches_url_spec.rb b/Library/Homebrew/test/rubocops/cask/homepage_matches_url_spec.rb
index dd175cb4f..4ef084f3e 100644
--- a/Library/Homebrew/test/rubocops/cask/homepage_matches_url_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/homepage_matches_url_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/rubocop-cask"
diff --git a/Library/Homebrew/test/rubocops/cask/homepage_url_trailing_slash_spec.rb b/Library/Homebrew/test/rubocops/cask/homepage_url_trailing_slash_spec.rb
index 81fea8a00..05d98bec5 100644
--- a/Library/Homebrew/test/rubocops/cask/homepage_url_trailing_slash_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/homepage_url_trailing_slash_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/rubocop-cask"
diff --git a/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb b/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb
index 2f6d5747c..a8f1c574e 100644
--- a/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/no_dsl_version_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/rubocop-cask"
diff --git a/Library/Homebrew/test/rubocops/cask/shared_examples/cask_cop.rb b/Library/Homebrew/test/rubocops/cask/shared_examples/cask_cop.rb
index 3a11d6be0..8654a4960 100644
--- a/Library/Homebrew/test/rubocops/cask/shared_examples/cask_cop.rb
+++ b/Library/Homebrew/test/rubocops/cask/shared_examples/cask_cop.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module CaskCop
diff --git a/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb b/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb
index 21cfb5393..3cce05098 100644
--- a/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/rubocop-cask"
diff --git a/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb b/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb
index c10ef5bf5..0afabf038 100644
--- a/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/rubocop-cask"
diff --git a/Library/Homebrew/test/rubocops/caveats_spec.rb b/Library/Homebrew/test/rubocops/caveats_spec.rb
index a19e8ab8f..a2b76acb8 100644
--- a/Library/Homebrew/test/rubocops/caveats_spec.rb
+++ b/Library/Homebrew/test/rubocops/caveats_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/caveats"
diff --git a/Library/Homebrew/test/rubocops/checksum_spec.rb b/Library/Homebrew/test/rubocops/checksum_spec.rb
index 0d3f0e542..460987283 100644
--- a/Library/Homebrew/test/rubocops/checksum_spec.rb
+++ b/Library/Homebrew/test/rubocops/checksum_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/checksum"
diff --git a/Library/Homebrew/test/rubocops/class_spec.rb b/Library/Homebrew/test/rubocops/class_spec.rb
index 06a3c9470..1f0c84ab2 100644
--- a/Library/Homebrew/test/rubocops/class_spec.rb
+++ b/Library/Homebrew/test/rubocops/class_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/class"
diff --git a/Library/Homebrew/test/rubocops/components_order_spec.rb b/Library/Homebrew/test/rubocops/components_order_spec.rb
index cedab6222..098e78254 100644
--- a/Library/Homebrew/test/rubocops/components_order_spec.rb
+++ b/Library/Homebrew/test/rubocops/components_order_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/components_order"
diff --git a/Library/Homebrew/test/rubocops/components_redundancy_spec.rb b/Library/Homebrew/test/rubocops/components_redundancy_spec.rb
index 4eea2dca3..5bb778d29 100644
--- a/Library/Homebrew/test/rubocops/components_redundancy_spec.rb
+++ b/Library/Homebrew/test/rubocops/components_redundancy_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/components_redundancy"
diff --git a/Library/Homebrew/test/rubocops/conflicts_spec.rb b/Library/Homebrew/test/rubocops/conflicts_spec.rb
index 6a1a839ce..3d2fe4146 100644
--- a/Library/Homebrew/test/rubocops/conflicts_spec.rb
+++ b/Library/Homebrew/test/rubocops/conflicts_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/conflicts"
diff --git a/Library/Homebrew/test/rubocops/dependency_order_spec.rb b/Library/Homebrew/test/rubocops/dependency_order_spec.rb
index 5863686c3..8d5be00c2 100644
--- a/Library/Homebrew/test/rubocops/dependency_order_spec.rb
+++ b/Library/Homebrew/test/rubocops/dependency_order_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/dependency_order"
diff --git a/Library/Homebrew/test/rubocops/deprecate_disable_spec.rb b/Library/Homebrew/test/rubocops/deprecate_disable_spec.rb
index 4756a361d..afc1da7e3 100644
--- a/Library/Homebrew/test/rubocops/deprecate_disable_spec.rb
+++ b/Library/Homebrew/test/rubocops/deprecate_disable_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/deprecate_disable"
diff --git a/Library/Homebrew/test/rubocops/files_spec.rb b/Library/Homebrew/test/rubocops/files_spec.rb
index 83142a1b5..746b4212b 100644
--- a/Library/Homebrew/test/rubocops/files_spec.rb
+++ b/Library/Homebrew/test/rubocops/files_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/files"
diff --git a/Library/Homebrew/test/rubocops/formula_desc_spec.rb b/Library/Homebrew/test/rubocops/formula_desc_spec.rb
index 5d85184ef..47c518537 100644
--- a/Library/Homebrew/test/rubocops/formula_desc_spec.rb
+++ b/Library/Homebrew/test/rubocops/formula_desc_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/formula_desc"
diff --git a/Library/Homebrew/test/rubocops/homepage_spec.rb b/Library/Homebrew/test/rubocops/homepage_spec.rb
index fcdc6b9a1..cfabcb092 100644
--- a/Library/Homebrew/test/rubocops/homepage_spec.rb
+++ b/Library/Homebrew/test/rubocops/homepage_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/homepage"
diff --git a/Library/Homebrew/test/rubocops/keg_only_spec.rb b/Library/Homebrew/test/rubocops/keg_only_spec.rb
index 2f0af35aa..16bb4c623 100644
--- a/Library/Homebrew/test/rubocops/keg_only_spec.rb
+++ b/Library/Homebrew/test/rubocops/keg_only_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/keg_only"
diff --git a/Library/Homebrew/test/rubocops/lines_spec.rb b/Library/Homebrew/test/rubocops/lines_spec.rb
index fa61dd9a6..a5b3cbd69 100644
--- a/Library/Homebrew/test/rubocops/lines_spec.rb
+++ b/Library/Homebrew/test/rubocops/lines_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/lines"
diff --git a/Library/Homebrew/test/rubocops/livecheck_spec.rb b/Library/Homebrew/test/rubocops/livecheck_spec.rb
index 5bda3ac2c..33bb7cf2e 100644
--- a/Library/Homebrew/test/rubocops/livecheck_spec.rb
+++ b/Library/Homebrew/test/rubocops/livecheck_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/livecheck"
diff --git a/Library/Homebrew/test/rubocops/options_spec.rb b/Library/Homebrew/test/rubocops/options_spec.rb
index 7b8a5823a..e1d998198 100644
--- a/Library/Homebrew/test/rubocops/options_spec.rb
+++ b/Library/Homebrew/test/rubocops/options_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/options"
diff --git a/Library/Homebrew/test/rubocops/patches_spec.rb b/Library/Homebrew/test/rubocops/patches_spec.rb
index f1bbc3d37..41d24cc51 100644
--- a/Library/Homebrew/test/rubocops/patches_spec.rb
+++ b/Library/Homebrew/test/rubocops/patches_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/patches"
diff --git a/Library/Homebrew/test/rubocops/text_spec.rb b/Library/Homebrew/test/rubocops/text_spec.rb
index 3960272db..c308451b1 100644
--- a/Library/Homebrew/test/rubocops/text_spec.rb
+++ b/Library/Homebrew/test/rubocops/text_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/text"
diff --git a/Library/Homebrew/test/rubocops/urls_spec.rb b/Library/Homebrew/test/rubocops/urls_spec.rb
index e36f40493..0be3154ee 100644
--- a/Library/Homebrew/test/rubocops/urls_spec.rb
+++ b/Library/Homebrew/test/rubocops/urls_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/urls"
diff --git a/Library/Homebrew/test/rubocops/uses_from_macos_spec.rb b/Library/Homebrew/test/rubocops/uses_from_macos_spec.rb
index d74cb57d2..6a1280050 100644
--- a/Library/Homebrew/test/rubocops/uses_from_macos_spec.rb
+++ b/Library/Homebrew/test/rubocops/uses_from_macos_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/uses_from_macos"
diff --git a/Library/Homebrew/test/rubocops/version_spec.rb b/Library/Homebrew/test/rubocops/version_spec.rb
index 45ac7ecf1..cf36fea01 100644
--- a/Library/Homebrew/test/rubocops/version_spec.rb
+++ b/Library/Homebrew/test/rubocops/version_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "rubocops/version"
diff --git a/Library/Homebrew/test/sandbox_spec.rb b/Library/Homebrew/test/sandbox_spec.rb
index f3b323eaf..10f4abde6 100644
--- a/Library/Homebrew/test/sandbox_spec.rb
+++ b/Library/Homebrew/test/sandbox_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "sandbox"
diff --git a/Library/Homebrew/test/search_spec.rb b/Library/Homebrew/test/search_spec.rb
index 0f3bfbe6a..84377c475 100644
--- a/Library/Homebrew/test/search_spec.rb
+++ b/Library/Homebrew/test/search_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "search"
diff --git a/Library/Homebrew/test/searchable_spec.rb b/Library/Homebrew/test/searchable_spec.rb
index 6fdb4557d..f7e059ffb 100644
--- a/Library/Homebrew/test/searchable_spec.rb
+++ b/Library/Homebrew/test/searchable_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "searchable"
diff --git a/Library/Homebrew/test/software_spec_spec.rb b/Library/Homebrew/test/software_spec_spec.rb
index 34278b48e..965fca8cf 100644
--- a/Library/Homebrew/test/software_spec_spec.rb
+++ b/Library/Homebrew/test/software_spec_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "software_spec"
diff --git a/Library/Homebrew/test/spec_helper.rb b/Library/Homebrew/test/spec_helper.rb
index 406ffc756..dabc1816d 100644
--- a/Library/Homebrew/test/spec_helper.rb
+++ b/Library/Homebrew/test/spec_helper.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 if ENV["HOMEBREW_TESTS_COVERAGE"]
diff --git a/Library/Homebrew/test/string_spec.rb b/Library/Homebrew/test/string_spec.rb
index 646d53765..0442c620a 100644
--- a/Library/Homebrew/test/string_spec.rb
+++ b/Library/Homebrew/test/string_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "extend/string"
diff --git a/Library/Homebrew/test/style_spec.rb b/Library/Homebrew/test/style_spec.rb
index abe5e23b8..d187cbc19 100644
--- a/Library/Homebrew/test/style_spec.rb
+++ b/Library/Homebrew/test/style_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "style"
diff --git a/Library/Homebrew/test/support/fixtures/failball.rb b/Library/Homebrew/test/support/fixtures/failball.rb
index 5ba1692ef..e4a15344b 100644
--- a/Library/Homebrew/test/support/fixtures/failball.rb
+++ b/Library/Homebrew/test/support/fixtures/failball.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Failball < Formula
diff --git a/Library/Homebrew/test/support/fixtures/testball.rb b/Library/Homebrew/test/support/fixtures/testball.rb
index 27ff8dafc..1a99de291 100644
--- a/Library/Homebrew/test/support/fixtures/testball.rb
+++ b/Library/Homebrew/test/support/fixtures/testball.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Testball < Formula
diff --git a/Library/Homebrew/test/support/fixtures/testball_bottle.rb b/Library/Homebrew/test/support/fixtures/testball_bottle.rb
index 76d8d7e7c..d3f159eaf 100644
--- a/Library/Homebrew/test/support/fixtures/testball_bottle.rb
+++ b/Library/Homebrew/test/support/fixtures/testball_bottle.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class TestballBottle < Formula
diff --git a/Library/Homebrew/test/support/github_formatter.rb b/Library/Homebrew/test/support/github_formatter.rb
index 7010a4d93..6f019f9ba 100644
--- a/Library/Homebrew/test/support/github_formatter.rb
+++ b/Library/Homebrew/test/support/github_formatter.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rspec/core"
diff --git a/Library/Homebrew/test/support/helper/cask.rb b/Library/Homebrew/test/support/helper/cask.rb
index 940e80a4f..6dd863daa 100644
--- a/Library/Homebrew/test/support/helper/cask.rb
+++ b/Library/Homebrew/test/support/helper/cask.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/cask_loader"
diff --git a/Library/Homebrew/test/support/helper/cask/fake_system_command.rb b/Library/Homebrew/test/support/helper/cask/fake_system_command.rb
index 47080e641..2587e7bc5 100644
--- a/Library/Homebrew/test/support/helper/cask/fake_system_command.rb
+++ b/Library/Homebrew/test/support/helper/cask/fake_system_command.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 def sudo(*args)
diff --git a/Library/Homebrew/test/support/helper/cask/install_helper.rb b/Library/Homebrew/test/support/helper/cask/install_helper.rb
index 19ef9594e..18c083059 100644
--- a/Library/Homebrew/test/support/helper/cask/install_helper.rb
+++ b/Library/Homebrew/test/support/helper/cask/install_helper.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "cask/installer"
diff --git a/Library/Homebrew/test/support/helper/cask/never_sudo_system_command.rb b/Library/Homebrew/test/support/helper/cask/never_sudo_system_command.rb
index be2570a0c..b5859c174 100644
--- a/Library/Homebrew/test/support/helper/cask/never_sudo_system_command.rb
+++ b/Library/Homebrew/test/support/helper/cask/never_sudo_system_command.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "system_command"
diff --git a/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb b/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb
index 8be3998c1..eaa659e8a 100755
--- a/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb
+++ b/Library/Homebrew/test/support/helper/cmd/brew-verify-formula-undefined.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/parser"
diff --git a/Library/Homebrew/test/support/helper/fixtures.rb b/Library/Homebrew/test/support/helper/fixtures.rb
index fc5cf48c8..2dd4b4c65 100644
--- a/Library/Homebrew/test/support/helper/fixtures.rb
+++ b/Library/Homebrew/test/support/helper/fixtures.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Test
diff --git a/Library/Homebrew/test/support/helper/formula.rb b/Library/Homebrew/test/support/helper/formula.rb
index caf4a1c73..256ef05e5 100644
--- a/Library/Homebrew/test/support/helper/formula.rb
+++ b/Library/Homebrew/test/support/helper/formula.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "formulary"
diff --git a/Library/Homebrew/test/support/helper/integration_mocks.rb b/Library/Homebrew/test/support/helper/integration_mocks.rb
index 2e4ec4b26..245a2aef0 100644
--- a/Library/Homebrew/test/support/helper/integration_mocks.rb
+++ b/Library/Homebrew/test/support/helper/integration_mocks.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Homebrew
diff --git a/Library/Homebrew/test/support/helper/mktmpdir.rb b/Library/Homebrew/test/support/helper/mktmpdir.rb
index 6cb369c41..f6cc4282c 100644
--- a/Library/Homebrew/test/support/helper/mktmpdir.rb
+++ b/Library/Homebrew/test/support/helper/mktmpdir.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Test
diff --git a/Library/Homebrew/test/support/helper/output_as_tty.rb b/Library/Homebrew/test/support/helper/output_as_tty.rb
index ca7f4ca66..24b25fd89 100644
--- a/Library/Homebrew/test/support/helper/output_as_tty.rb
+++ b/Library/Homebrew/test/support/helper/output_as_tty.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "delegate"
diff --git a/Library/Homebrew/test/support/helper/spec/shared_context/homebrew_cask.rb b/Library/Homebrew/test/support/helper/spec/shared_context/homebrew_cask.rb
index db6836796..760bd8014 100644
--- a/Library/Homebrew/test/support/helper/spec/shared_context/homebrew_cask.rb
+++ b/Library/Homebrew/test/support/helper/spec/shared_context/homebrew_cask.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cask/config"
diff --git a/Library/Homebrew/test/support/helper/spec/shared_context/integration_test.rb b/Library/Homebrew/test/support/helper/spec/shared_context/integration_test.rb
index aeebb8c14..3d18361e9 100644
--- a/Library/Homebrew/test/support/helper/spec/shared_context/integration_test.rb
+++ b/Library/Homebrew/test/support/helper/spec/shared_context/integration_test.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/test/support/helper/spec/shared_examples/formulae_exist.rb b/Library/Homebrew/test/support/helper/spec/shared_examples/formulae_exist.rb
index b00565797..e52610016 100644
--- a/Library/Homebrew/test/support/helper/spec/shared_examples/formulae_exist.rb
+++ b/Library/Homebrew/test/support/helper/spec/shared_examples/formulae_exist.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 shared_examples "formulae exist" do |array|
diff --git a/Library/Homebrew/test/support/lib/config.rb b/Library/Homebrew/test/support/lib/config.rb
index a9c6769f7..b68490628 100644
--- a/Library/Homebrew/test/support/lib/config.rb
+++ b/Library/Homebrew/test/support/lib/config.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 raise "HOMEBREW_BREW_FILE was not exported! Please call bin/brew directly!" unless ENV["HOMEBREW_BREW_FILE"]
diff --git a/Library/Homebrew/test/support/no_seed_progress_formatter.rb b/Library/Homebrew/test/support/no_seed_progress_formatter.rb
index d6199bd9a..493883e8b 100644
--- a/Library/Homebrew/test/support/no_seed_progress_formatter.rb
+++ b/Library/Homebrew/test/support/no_seed_progress_formatter.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "rspec/core/formatters/progress_formatter"
diff --git a/Library/Homebrew/test/system_command_result_spec.rb b/Library/Homebrew/test/system_command_result_spec.rb
index bc48fcdd7..8d37dbf57 100644
--- a/Library/Homebrew/test/system_command_result_spec.rb
+++ b/Library/Homebrew/test/system_command_result_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "system_command"
diff --git a/Library/Homebrew/test/system_command_spec.rb b/Library/Homebrew/test/system_command_spec.rb
index 5c5506eec..fef1692de 100644
--- a/Library/Homebrew/test/system_command_spec.rb
+++ b/Library/Homebrew/test/system_command_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe SystemCommand do
diff --git a/Library/Homebrew/test/tab_spec.rb b/Library/Homebrew/test/tab_spec.rb
index b4005db52..355a1c183 100644
--- a/Library/Homebrew/test/tab_spec.rb
+++ b/Library/Homebrew/test/tab_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "tab"
diff --git a/Library/Homebrew/test/tap_spec.rb b/Library/Homebrew/test/tap_spec.rb
index d4263d126..78db92667 100644
--- a/Library/Homebrew/test/tap_spec.rb
+++ b/Library/Homebrew/test/tap_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Tap do
diff --git a/Library/Homebrew/test/unpack_strategy/bazaar_spec.rb b/Library/Homebrew/test/unpack_strategy/bazaar_spec.rb
index 434a76a94..0db95af39 100644
--- a/Library/Homebrew/test/unpack_strategy/bazaar_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/bazaar_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/bzip2_spec.rb b/Library/Homebrew/test/unpack_strategy/bzip2_spec.rb
index a81f15bab..126985010 100644
--- a/Library/Homebrew/test/unpack_strategy/bzip2_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/bzip2_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/cvs_spec.rb b/Library/Homebrew/test/unpack_strategy/cvs_spec.rb
index 8eebf17da..2b9ebaa58 100644
--- a/Library/Homebrew/test/unpack_strategy/cvs_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/cvs_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/directory_spec.rb b/Library/Homebrew/test/unpack_strategy/directory_spec.rb
index dc321a464..ae12a3770 100644
--- a/Library/Homebrew/test/unpack_strategy/directory_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/directory_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/dmg_spec.rb b/Library/Homebrew/test/unpack_strategy/dmg_spec.rb
index 8a3594f14..7b30d119c 100644
--- a/Library/Homebrew/test/unpack_strategy/dmg_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/dmg_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/git_spec.rb b/Library/Homebrew/test/unpack_strategy/git_spec.rb
index 738146a78..b3831b731 100644
--- a/Library/Homebrew/test/unpack_strategy/git_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/git_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/gzip_spec.rb b/Library/Homebrew/test/unpack_strategy/gzip_spec.rb
index ebf4a493b..0f85ad24d 100644
--- a/Library/Homebrew/test/unpack_strategy/gzip_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/gzip_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/jar_spec.rb b/Library/Homebrew/test/unpack_strategy/jar_spec.rb
index f6da64b97..042f9bf01 100644
--- a/Library/Homebrew/test/unpack_strategy/jar_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/jar_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/lha_spec.rb b/Library/Homebrew/test/unpack_strategy/lha_spec.rb
index e24a60a65..18921910b 100644
--- a/Library/Homebrew/test/unpack_strategy/lha_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/lha_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/lzip_spec.rb b/Library/Homebrew/test/unpack_strategy/lzip_spec.rb
index a74b68add..cd4932c91 100644
--- a/Library/Homebrew/test/unpack_strategy/lzip_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/lzip_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/mercurial_spec.rb b/Library/Homebrew/test/unpack_strategy/mercurial_spec.rb
index 76a28e27b..c29066ff7 100644
--- a/Library/Homebrew/test/unpack_strategy/mercurial_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/mercurial_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/p7zip_spec.rb b/Library/Homebrew/test/unpack_strategy/p7zip_spec.rb
index c612b13f0..09386a177 100644
--- a/Library/Homebrew/test/unpack_strategy/p7zip_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/p7zip_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/rar_spec.rb b/Library/Homebrew/test/unpack_strategy/rar_spec.rb
index 5e5e59333..9ddea401f 100644
--- a/Library/Homebrew/test/unpack_strategy/rar_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/rar_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/shared_examples.rb b/Library/Homebrew/test/unpack_strategy/shared_examples.rb
index 6f3caa475..3c034d008 100644
--- a/Library/Homebrew/test/unpack_strategy/shared_examples.rb
+++ b/Library/Homebrew/test/unpack_strategy/shared_examples.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "unpack_strategy"
diff --git a/Library/Homebrew/test/unpack_strategy/subversion_spec.rb b/Library/Homebrew/test/unpack_strategy/subversion_spec.rb
index 78795f94c..d1baca44b 100644
--- a/Library/Homebrew/test/unpack_strategy/subversion_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/subversion_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/tar_spec.rb b/Library/Homebrew/test/unpack_strategy/tar_spec.rb
index ae11929b3..078762a12 100644
--- a/Library/Homebrew/test/unpack_strategy/tar_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/tar_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/uncompressed_spec.rb b/Library/Homebrew/test/unpack_strategy/uncompressed_spec.rb
index 8e8c5d923..857ac134e 100644
--- a/Library/Homebrew/test/unpack_strategy/uncompressed_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/uncompressed_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/xar_spec.rb b/Library/Homebrew/test/unpack_strategy/xar_spec.rb
index f4f11389d..28870a2d7 100644
--- a/Library/Homebrew/test/unpack_strategy/xar_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/xar_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/xz_spec.rb b/Library/Homebrew/test/unpack_strategy/xz_spec.rb
index ffc41369a..f6befa95a 100644
--- a/Library/Homebrew/test/unpack_strategy/xz_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/xz_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy/zip_spec.rb b/Library/Homebrew/test/unpack_strategy/zip_spec.rb
index c579fff51..dd27c5de4 100644
--- a/Library/Homebrew/test/unpack_strategy/zip_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/zip_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require_relative "shared_examples"
diff --git a/Library/Homebrew/test/unpack_strategy_spec.rb b/Library/Homebrew/test/unpack_strategy_spec.rb
index bfcbc2421..055fe3c96 100644
--- a/Library/Homebrew/test/unpack_strategy_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe UnpackStrategy do
diff --git a/Library/Homebrew/test/utils/analytics_spec.rb b/Library/Homebrew/test/utils/analytics_spec.rb
index cca36c836..588c35d3b 100644
--- a/Library/Homebrew/test/utils/analytics_spec.rb
+++ b/Library/Homebrew/test/utils/analytics_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/analytics"
diff --git a/Library/Homebrew/test/utils/bottles/bintray_spec.rb b/Library/Homebrew/test/utils/bottles/bintray_spec.rb
index 87a9a7c7e..eb9605833 100644
--- a/Library/Homebrew/test/utils/bottles/bintray_spec.rb
+++ b/Library/Homebrew/test/utils/bottles/bintray_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/bottles"
diff --git a/Library/Homebrew/test/utils/bottles/bottles_spec.rb b/Library/Homebrew/test/utils/bottles/bottles_spec.rb
index 897bbb57f..d3eacd60b 100644
--- a/Library/Homebrew/test/utils/bottles/bottles_spec.rb
+++ b/Library/Homebrew/test/utils/bottles/bottles_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/bottles"
diff --git a/Library/Homebrew/test/utils/bottles/collector_spec.rb b/Library/Homebrew/test/utils/bottles/collector_spec.rb
index f83ca75ea..3314db26d 100644
--- a/Library/Homebrew/test/utils/bottles/collector_spec.rb
+++ b/Library/Homebrew/test/utils/bottles/collector_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/bottles"
diff --git a/Library/Homebrew/test/utils/curl_spec.rb b/Library/Homebrew/test/utils/curl_spec.rb
index 544e57bc1..af153426b 100644
--- a/Library/Homebrew/test/utils/curl_spec.rb
+++ b/Library/Homebrew/test/utils/curl_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/curl"
diff --git a/Library/Homebrew/test/utils/fork_spec.rb b/Library/Homebrew/test/utils/fork_spec.rb
index fa1d27fb3..330ffbeba 100644
--- a/Library/Homebrew/test/utils/fork_spec.rb
+++ b/Library/Homebrew/test/utils/fork_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/fork"
diff --git a/Library/Homebrew/test/utils/git_spec.rb b/Library/Homebrew/test/utils/git_spec.rb
index f03f61437..0ec931091 100644
--- a/Library/Homebrew/test/utils/git_spec.rb
+++ b/Library/Homebrew/test/utils/git_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/git"
diff --git a/Library/Homebrew/test/utils/github/actions_spec.rb b/Library/Homebrew/test/utils/github/actions_spec.rb
index 1951d5e56..290e0f855 100644
--- a/Library/Homebrew/test/utils/github/actions_spec.rb
+++ b/Library/Homebrew/test/utils/github/actions_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/github/actions"
diff --git a/Library/Homebrew/test/utils/github_spec.rb b/Library/Homebrew/test/utils/github_spec.rb
index 6c7739ff7..4e785e7da 100644
--- a/Library/Homebrew/test/utils/github_spec.rb
+++ b/Library/Homebrew/test/utils/github_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/github"
diff --git a/Library/Homebrew/test/utils/livecheck_formula_spec.rb b/Library/Homebrew/test/utils/livecheck_formula_spec.rb
index 41ffe7113..7f8495b34 100644
--- a/Library/Homebrew/test/utils/livecheck_formula_spec.rb
+++ b/Library/Homebrew/test/utils/livecheck_formula_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/livecheck_formula"
diff --git a/Library/Homebrew/test/utils/popen_spec.rb b/Library/Homebrew/test/utils/popen_spec.rb
index dcce91d8b..7ea5474e7 100644
--- a/Library/Homebrew/test/utils/popen_spec.rb
+++ b/Library/Homebrew/test/utils/popen_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/popen"
diff --git a/Library/Homebrew/test/utils/repology_spec.rb b/Library/Homebrew/test/utils/repology_spec.rb
index d2fa37b05..acacade36 100644
--- a/Library/Homebrew/test/utils/repology_spec.rb
+++ b/Library/Homebrew/test/utils/repology_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/repology"
diff --git a/Library/Homebrew/test/utils/shell_spec.rb b/Library/Homebrew/test/utils/shell_spec.rb
index d4844080b..61c24e745 100644
--- a/Library/Homebrew/test/utils/shell_spec.rb
+++ b/Library/Homebrew/test/utils/shell_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/shell"
diff --git a/Library/Homebrew/test/utils/spdx_spec.rb b/Library/Homebrew/test/utils/spdx_spec.rb
index 01c02171d..5530a27b4 100644
--- a/Library/Homebrew/test/utils/spdx_spec.rb
+++ b/Library/Homebrew/test/utils/spdx_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/spdx"
diff --git a/Library/Homebrew/test/utils/svn_spec.rb b/Library/Homebrew/test/utils/svn_spec.rb
index da6ec91ec..f4ec8b7f3 100644
--- a/Library/Homebrew/test/utils/svn_spec.rb
+++ b/Library/Homebrew/test/utils/svn_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/svn"
diff --git a/Library/Homebrew/test/utils/tar_spec.rb b/Library/Homebrew/test/utils/tar_spec.rb
index b3569cad8..0b7ff0ee5 100644
--- a/Library/Homebrew/test/utils/tar_spec.rb
+++ b/Library/Homebrew/test/utils/tar_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/tar"
diff --git a/Library/Homebrew/test/utils/tty_spec.rb b/Library/Homebrew/test/utils/tty_spec.rb
index 32b259e2b..6f728041f 100644
--- a/Library/Homebrew/test/utils/tty_spec.rb
+++ b/Library/Homebrew/test/utils/tty_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe Tty do
diff --git a/Library/Homebrew/test/utils/user_spec.rb b/Library/Homebrew/test/utils/user_spec.rb
index c26862dc4..53c708925 100644
--- a/Library/Homebrew/test/utils/user_spec.rb
+++ b/Library/Homebrew/test/utils/user_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/user"
diff --git a/Library/Homebrew/test/utils_spec.rb b/Library/Homebrew/test/utils_spec.rb
index 977852b6b..efaf32660 100644
--- a/Library/Homebrew/test/utils_spec.rb
+++ b/Library/Homebrew/test/utils_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 describe "globally-scoped helper methods" do
diff --git a/Library/Homebrew/test/version_spec.rb b/Library/Homebrew/test/version_spec.rb
index 04f4cdf3b..ab18e0c64 100644
--- a/Library/Homebrew/test/version_spec.rb
+++ b/Library/Homebrew/test/version_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "version"
diff --git a/Library/Homebrew/test/x11_requirement_spec.rb b/Library/Homebrew/test/x11_requirement_spec.rb
index 436e0c15e..4076f1a55 100644
--- a/Library/Homebrew/test/x11_requirement_spec.rb
+++ b/Library/Homebrew/test/x11_requirement_spec.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "cli/args"
diff --git a/Library/Homebrew/unpack_strategy.rb b/Library/Homebrew/unpack_strategy.rb
index 9540b4029..f76069f3b 100644
--- a/Library/Homebrew/unpack_strategy.rb
+++ b/Library/Homebrew/unpack_strategy.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Module containing all available strategies for unpacking archives.
diff --git a/Library/Homebrew/unpack_strategy/air.rb b/Library/Homebrew/unpack_strategy/air.rb
index 47a2a7f6b..8d6e73cd1 100644
--- a/Library/Homebrew/unpack_strategy/air.rb
+++ b/Library/Homebrew/unpack_strategy/air.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/bazaar.rb b/Library/Homebrew/unpack_strategy/bazaar.rb
index 3bb3c4d6b..f50957a12 100644
--- a/Library/Homebrew/unpack_strategy/bazaar.rb
+++ b/Library/Homebrew/unpack_strategy/bazaar.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "directory"
diff --git a/Library/Homebrew/unpack_strategy/bzip2.rb b/Library/Homebrew/unpack_strategy/bzip2.rb
index 9eff311a8..79d25aaa5 100644
--- a/Library/Homebrew/unpack_strategy/bzip2.rb
+++ b/Library/Homebrew/unpack_strategy/bzip2.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/cab.rb b/Library/Homebrew/unpack_strategy/cab.rb
index f36fa1f58..00b083128 100644
--- a/Library/Homebrew/unpack_strategy/cab.rb
+++ b/Library/Homebrew/unpack_strategy/cab.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/compress.rb b/Library/Homebrew/unpack_strategy/compress.rb
index 668272df8..8e83fa057 100644
--- a/Library/Homebrew/unpack_strategy/compress.rb
+++ b/Library/Homebrew/unpack_strategy/compress.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "tar"
diff --git a/Library/Homebrew/unpack_strategy/cvs.rb b/Library/Homebrew/unpack_strategy/cvs.rb
index 36e4d506e..66c2f17f8 100644
--- a/Library/Homebrew/unpack_strategy/cvs.rb
+++ b/Library/Homebrew/unpack_strategy/cvs.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "directory"
diff --git a/Library/Homebrew/unpack_strategy/directory.rb b/Library/Homebrew/unpack_strategy/directory.rb
index 06d8dd988..0e8c68b59 100644
--- a/Library/Homebrew/unpack_strategy/directory.rb
+++ b/Library/Homebrew/unpack_strategy/directory.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/dmg.rb b/Library/Homebrew/unpack_strategy/dmg.rb
index 234dd802b..1d2e8de5c 100644
--- a/Library/Homebrew/unpack_strategy/dmg.rb
+++ b/Library/Homebrew/unpack_strategy/dmg.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "tempfile"
diff --git a/Library/Homebrew/unpack_strategy/executable.rb b/Library/Homebrew/unpack_strategy/executable.rb
index 57e99908f..a592cce52 100644
--- a/Library/Homebrew/unpack_strategy/executable.rb
+++ b/Library/Homebrew/unpack_strategy/executable.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "uncompressed"
diff --git a/Library/Homebrew/unpack_strategy/fossil.rb b/Library/Homebrew/unpack_strategy/fossil.rb
index ea7f2216b..c8f165fdd 100644
--- a/Library/Homebrew/unpack_strategy/fossil.rb
+++ b/Library/Homebrew/unpack_strategy/fossil.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/generic_unar.rb b/Library/Homebrew/unpack_strategy/generic_unar.rb
index 545814174..7b0a0a53b 100644
--- a/Library/Homebrew/unpack_strategy/generic_unar.rb
+++ b/Library/Homebrew/unpack_strategy/generic_unar.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/git.rb b/Library/Homebrew/unpack_strategy/git.rb
index c704f13a4..23257c050 100644
--- a/Library/Homebrew/unpack_strategy/git.rb
+++ b/Library/Homebrew/unpack_strategy/git.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "directory"
diff --git a/Library/Homebrew/unpack_strategy/gzip.rb b/Library/Homebrew/unpack_strategy/gzip.rb
index 8f576788d..4797fbaa2 100644
--- a/Library/Homebrew/unpack_strategy/gzip.rb
+++ b/Library/Homebrew/unpack_strategy/gzip.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/jar.rb b/Library/Homebrew/unpack_strategy/jar.rb
index 8fc3a7047..ee05a876a 100644
--- a/Library/Homebrew/unpack_strategy/jar.rb
+++ b/Library/Homebrew/unpack_strategy/jar.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "uncompressed"
diff --git a/Library/Homebrew/unpack_strategy/lha.rb b/Library/Homebrew/unpack_strategy/lha.rb
index d3bfcaf87..70c3e5f70 100644
--- a/Library/Homebrew/unpack_strategy/lha.rb
+++ b/Library/Homebrew/unpack_strategy/lha.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/lua_rock.rb b/Library/Homebrew/unpack_strategy/lua_rock.rb
index 8517b140e..1336b856d 100644
--- a/Library/Homebrew/unpack_strategy/lua_rock.rb
+++ b/Library/Homebrew/unpack_strategy/lua_rock.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "uncompressed"
diff --git a/Library/Homebrew/unpack_strategy/lzip.rb b/Library/Homebrew/unpack_strategy/lzip.rb
index 687917cea..a27663e4d 100644
--- a/Library/Homebrew/unpack_strategy/lzip.rb
+++ b/Library/Homebrew/unpack_strategy/lzip.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/lzma.rb b/Library/Homebrew/unpack_strategy/lzma.rb
index 006fcfb74..e14de8e99 100644
--- a/Library/Homebrew/unpack_strategy/lzma.rb
+++ b/Library/Homebrew/unpack_strategy/lzma.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/mercurial.rb b/Library/Homebrew/unpack_strategy/mercurial.rb
index 7e0d3b64d..4538c8e8d 100644
--- a/Library/Homebrew/unpack_strategy/mercurial.rb
+++ b/Library/Homebrew/unpack_strategy/mercurial.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "directory"
diff --git a/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb b/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb
index 8c3463be0..5d97e6f22 100644
--- a/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb
+++ b/Library/Homebrew/unpack_strategy/microsoft_office_xml.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "uncompressed"
diff --git a/Library/Homebrew/unpack_strategy/otf.rb b/Library/Homebrew/unpack_strategy/otf.rb
index 17b55ed7a..1a0538d94 100644
--- a/Library/Homebrew/unpack_strategy/otf.rb
+++ b/Library/Homebrew/unpack_strategy/otf.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "uncompressed"
diff --git a/Library/Homebrew/unpack_strategy/p7zip.rb b/Library/Homebrew/unpack_strategy/p7zip.rb
index df7793319..5aca009f5 100644
--- a/Library/Homebrew/unpack_strategy/p7zip.rb
+++ b/Library/Homebrew/unpack_strategy/p7zip.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/pax.rb b/Library/Homebrew/unpack_strategy/pax.rb
index 89138e577..e914d41ba 100644
--- a/Library/Homebrew/unpack_strategy/pax.rb
+++ b/Library/Homebrew/unpack_strategy/pax.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/pkg.rb b/Library/Homebrew/unpack_strategy/pkg.rb
index 8dad4a443..20bf5057e 100644
--- a/Library/Homebrew/unpack_strategy/pkg.rb
+++ b/Library/Homebrew/unpack_strategy/pkg.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "uncompressed"
diff --git a/Library/Homebrew/unpack_strategy/rar.rb b/Library/Homebrew/unpack_strategy/rar.rb
index 5863b0742..71e2dd66a 100644
--- a/Library/Homebrew/unpack_strategy/rar.rb
+++ b/Library/Homebrew/unpack_strategy/rar.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/self_extracting_executable.rb b/Library/Homebrew/unpack_strategy/self_extracting_executable.rb
index 9de9120b0..c74166d77 100644
--- a/Library/Homebrew/unpack_strategy/self_extracting_executable.rb
+++ b/Library/Homebrew/unpack_strategy/self_extracting_executable.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "generic_unar"
diff --git a/Library/Homebrew/unpack_strategy/sit.rb b/Library/Homebrew/unpack_strategy/sit.rb
index 5ec16b48a..5fabbbbfc 100644
--- a/Library/Homebrew/unpack_strategy/sit.rb
+++ b/Library/Homebrew/unpack_strategy/sit.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "generic_unar"
diff --git a/Library/Homebrew/unpack_strategy/subversion.rb b/Library/Homebrew/unpack_strategy/subversion.rb
index 0c90b3660..dd3355825 100644
--- a/Library/Homebrew/unpack_strategy/subversion.rb
+++ b/Library/Homebrew/unpack_strategy/subversion.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "directory"
diff --git a/Library/Homebrew/unpack_strategy/tar.rb b/Library/Homebrew/unpack_strategy/tar.rb
index 25c30973d..7e7b407bc 100644
--- a/Library/Homebrew/unpack_strategy/tar.rb
+++ b/Library/Homebrew/unpack_strategy/tar.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/ttf.rb b/Library/Homebrew/unpack_strategy/ttf.rb
index 54c6a6bd8..b45755a42 100644
--- a/Library/Homebrew/unpack_strategy/ttf.rb
+++ b/Library/Homebrew/unpack_strategy/ttf.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require_relative "uncompressed"
diff --git a/Library/Homebrew/unpack_strategy/uncompressed.rb b/Library/Homebrew/unpack_strategy/uncompressed.rb
index ea7f943a2..1c869d998 100644
--- a/Library/Homebrew/unpack_strategy/uncompressed.rb
+++ b/Library/Homebrew/unpack_strategy/uncompressed.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/xar.rb b/Library/Homebrew/unpack_strategy/xar.rb
index 69422eb66..2f5f4794a 100644
--- a/Library/Homebrew/unpack_strategy/xar.rb
+++ b/Library/Homebrew/unpack_strategy/xar.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/xz.rb b/Library/Homebrew/unpack_strategy/xz.rb
index 29ac0c182..86f50d2a3 100644
--- a/Library/Homebrew/unpack_strategy/xz.rb
+++ b/Library/Homebrew/unpack_strategy/xz.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/unpack_strategy/zip.rb b/Library/Homebrew/unpack_strategy/zip.rb
index e58e556c7..09db337f8 100644
--- a/Library/Homebrew/unpack_strategy/zip.rb
+++ b/Library/Homebrew/unpack_strategy/zip.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module UnpackStrategy
diff --git a/Library/Homebrew/upgrade.rb b/Library/Homebrew/upgrade.rb
index 0dbd0d133..82f258eee 100644
--- a/Library/Homebrew/upgrade.rb
+++ b/Library/Homebrew/upgrade.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "reinstall"
diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index e56867e16..985a294be 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/analytics"
diff --git a/Library/Homebrew/utils/analytics.rb b/Library/Homebrew/utils/analytics.rb
index c6c1c9b8f..9524db721 100644
--- a/Library/Homebrew/utils/analytics.rb
+++ b/Library/Homebrew/utils/analytics.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "erb"
diff --git a/Library/Homebrew/utils/bottles.rb b/Library/Homebrew/utils/bottles.rb
index ec47aa0c9..1b8ee163e 100644
--- a/Library/Homebrew/utils/bottles.rb
+++ b/Library/Homebrew/utils/bottles.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "tab"
diff --git a/Library/Homebrew/utils/curl.rb b/Library/Homebrew/utils/curl.rb
index 4f517cc8d..db53efb9e 100644
--- a/Library/Homebrew/utils/curl.rb
+++ b/Library/Homebrew/utils/curl.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "open3"
diff --git a/Library/Homebrew/utils/fork.rb b/Library/Homebrew/utils/fork.rb
index 6427193ce..f7c16566c 100644
--- a/Library/Homebrew/utils/fork.rb
+++ b/Library/Homebrew/utils/fork.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "fcntl"
diff --git a/Library/Homebrew/utils/formatter.rb b/Library/Homebrew/utils/formatter.rb
index 60e88c60e..7835e93f2 100644
--- a/Library/Homebrew/utils/formatter.rb
+++ b/Library/Homebrew/utils/formatter.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/tty"
diff --git a/Library/Homebrew/utils/gems.rb b/Library/Homebrew/utils/gems.rb
index 0a98b0672..cdb688b5a 100644
--- a/Library/Homebrew/utils/gems.rb
+++ b/Library/Homebrew/utils/gems.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Never `require` anything in this file (except English). It needs to be able to
diff --git a/Library/Homebrew/utils/git.rb b/Library/Homebrew/utils/git.rb
index ad1ebe774..e2f592d43 100644
--- a/Library/Homebrew/utils/git.rb
+++ b/Library/Homebrew/utils/git.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/utils/github.rb b/Library/Homebrew/utils/github.rb
index f9605c070..b18a203d1 100644
--- a/Library/Homebrew/utils/github.rb
+++ b/Library/Homebrew/utils/github.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "tempfile"
diff --git a/Library/Homebrew/utils/github/actions.rb b/Library/Homebrew/utils/github/actions.rb
index 111a9d6ab..3dc7bf640 100644
--- a/Library/Homebrew/utils/github/actions.rb
+++ b/Library/Homebrew/utils/github/actions.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/tty"
diff --git a/Library/Homebrew/utils/inreplace.rb b/Library/Homebrew/utils/inreplace.rb
index ae3489b6c..9d94ae0a8 100644
--- a/Library/Homebrew/utils/inreplace.rb
+++ b/Library/Homebrew/utils/inreplace.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/utils/link.rb b/Library/Homebrew/utils/link.rb
index 8b3c6bb37..8078390f6 100644
--- a/Library/Homebrew/utils/link.rb
+++ b/Library/Homebrew/utils/link.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/utils/livecheck_formula.rb b/Library/Homebrew/utils/livecheck_formula.rb
index 25dc1c994..bd08714de 100644
--- a/Library/Homebrew/utils/livecheck_formula.rb
+++ b/Library/Homebrew/utils/livecheck_formula.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Helper module for parsing output of `brew livecheck`.
diff --git a/Library/Homebrew/utils/popen.rb b/Library/Homebrew/utils/popen.rb
index eac4823c6..b721b3191 100644
--- a/Library/Homebrew/utils/popen.rb
+++ b/Library/Homebrew/utils/popen.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/utils/pypi.rb b/Library/Homebrew/utils/pypi.rb
index eda3f66af..d9bb621ba 100644
--- a/Library/Homebrew/utils/pypi.rb
+++ b/Library/Homebrew/utils/pypi.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 # Helper functions for updating PyPi resources.
diff --git a/Library/Homebrew/utils/repology.rb b/Library/Homebrew/utils/repology.rb
index 7476b6b84..f1a017334 100644
--- a/Library/Homebrew/utils/repology.rb
+++ b/Library/Homebrew/utils/repology.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "utils/curl"
diff --git a/Library/Homebrew/utils/ruby_check_version_script.rb b/Library/Homebrew/utils/ruby_check_version_script.rb
index 3b607cdb2..fc8e483b2 100755
--- a/Library/Homebrew/utils/ruby_check_version_script.rb
+++ b/Library/Homebrew/utils/ruby_check_version_script.rb
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby --enable-frozen-string-literal --disable=gems,did_you_mean,rubyopt
+# typed: true
 # frozen_string_literal: true
 
 HOMEBREW_REQUIRED_RUBY_VERSION = ARGV.first.freeze
diff --git a/Library/Homebrew/utils/shared_audits.rb b/Library/Homebrew/utils/shared_audits.rb
index 0b956b88e..694f65980 100644
--- a/Library/Homebrew/utils/shared_audits.rb
+++ b/Library/Homebrew/utils/shared_audits.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "utils/curl"
diff --git a/Library/Homebrew/utils/shebang.rb b/Library/Homebrew/utils/shebang.rb
index 3e1267469..762ddf580 100644
--- a/Library/Homebrew/utils/shebang.rb
+++ b/Library/Homebrew/utils/shebang.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/utils/shell.rb b/Library/Homebrew/utils/shell.rb
index d8e77a8dd..4d9af01ff 100644
--- a/Library/Homebrew/utils/shell.rb
+++ b/Library/Homebrew/utils/shell.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/utils/spdx.rb b/Library/Homebrew/utils/spdx.rb
index 9420e343d..64467c291 100644
--- a/Library/Homebrew/utils/spdx.rb
+++ b/Library/Homebrew/utils/spdx.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "utils/github"
diff --git a/Library/Homebrew/utils/svn.rb b/Library/Homebrew/utils/svn.rb
index 1492b0831..239a63ca6 100644
--- a/Library/Homebrew/utils/svn.rb
+++ b/Library/Homebrew/utils/svn.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "system_command"
diff --git a/Library/Homebrew/utils/tar.rb b/Library/Homebrew/utils/tar.rb
index c60c834da..df29bf9ad 100644
--- a/Library/Homebrew/utils/tar.rb
+++ b/Library/Homebrew/utils/tar.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 module Utils
diff --git a/Library/Homebrew/utils/tty.rb b/Library/Homebrew/utils/tty.rb
index 774d1933b..3360f99cb 100644
--- a/Library/Homebrew/utils/tty.rb
+++ b/Library/Homebrew/utils/tty.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 # Various helper functions for interacting with TTYs.
diff --git a/Library/Homebrew/utils/user.rb b/Library/Homebrew/utils/user.rb
index d40a7b607..0973a95be 100644
--- a/Library/Homebrew/utils/user.rb
+++ b/Library/Homebrew/utils/user.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 require "delegate"
diff --git a/Library/Homebrew/version.rb b/Library/Homebrew/version.rb
index cb1edd4e7..4c22d2f28 100644
--- a/Library/Homebrew/version.rb
+++ b/Library/Homebrew/version.rb
@@ -1,3 +1,4 @@
+# typed: false
 # frozen_string_literal: true
 
 require "version/null"
diff --git a/Library/Homebrew/version/null.rb b/Library/Homebrew/version/null.rb
index 7b63523b4..f2b74a35e 100644
--- a/Library/Homebrew/version/null.rb
+++ b/Library/Homebrew/version/null.rb
@@ -1,3 +1,4 @@
+# typed: true
 # frozen_string_literal: true
 
 class Version
diff --git a/Library/add-typed.rb b/Library/add-typed.rb
new file mode 100755
index 000000000..6860b9e7b
--- /dev/null
+++ b/Library/add-typed.rb
@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+
+require 'pathname'
+require 'open3'
+
+
+Dir.chdir "#{__dir__}/Homebrew"
+
+files = Pathname.glob("**/*.rb").reject { |path| path.to_s.start_with?("vendor/") }
+
+files.each do |file|
+
+  content = file.read
+
+  if content.start_with?("# typed: ")
+    puts "Already typed: #{file}"
+    next
+  end
+
+  ['strict', 'true', 'false', 'ignore'].each do |level|
+    puts "Trying #{file} with level #{level}."
+    file.write "# typed: #{level}\n#{content.strip}\n"
+
+    output, status = Open3.capture2e('brew', 'typecheck')
+    break if status.success?
+  end
+end