From 24ae318a3d5f0519f5fe29d08e01e8a044d99d87 Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Sat, 10 Oct 2020 14:16:11 +0200
Subject: [PATCH] Move type annotations into files.

---
 Library/Homebrew/PATH.rb                      |   1 +
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 Library/Homebrew/test/utils/shell_spec.rb     |   1 +
 Library/Homebrew/test/utils/spdx_spec.rb      |   1 +
 Library/Homebrew/test/utils/svn_spec.rb       |   1 +
 Library/Homebrew/test/utils/tar_spec.rb       |   1 +
 Library/Homebrew/test/utils/tty_spec.rb       |   1 +
 Library/Homebrew/test/utils/user_spec.rb      |   1 +
 Library/Homebrew/test/utils_spec.rb           |   1 +
 Library/Homebrew/test/version_spec.rb         |   1 +
 Library/Homebrew/test/x11_requirement_spec.rb |   1 +
 Library/Homebrew/unpack_strategy.rb           |   1 +
 Library/Homebrew/unpack_strategy/air.rb       |   1 +
 Library/Homebrew/unpack_strategy/bazaar.rb    |   1 +
 Library/Homebrew/unpack_strategy/bzip2.rb     |   1 +
 Library/Homebrew/unpack_strategy/cab.rb       |   1 +
 Library/Homebrew/unpack_strategy/compress.rb  |   1 +
 Library/Homebrew/unpack_strategy/cvs.rb       |   1 +
 Library/Homebrew/unpack_strategy/directory.rb |   1 +
 Library/Homebrew/unpack_strategy/dmg.rb       |   1 +
 .../Homebrew/unpack_strategy/executable.rb    |   1 +
 Library/Homebrew/unpack_strategy/fossil.rb    |   1 +
 .../Homebrew/unpack_strategy/generic_unar.rb  |   1 +
 Library/Homebrew/unpack_strategy/git.rb       |   1 +
 Library/Homebrew/unpack_strategy/gzip.rb      |   1 +
 Library/Homebrew/unpack_strategy/jar.rb       |   1 +
 Library/Homebrew/unpack_strategy/lha.rb       |   1 +
 Library/Homebrew/unpack_strategy/lua_rock.rb  |   1 +
 Library/Homebrew/unpack_strategy/lzip.rb      |   1 +
 Library/Homebrew/unpack_strategy/lzma.rb      |   1 +
 Library/Homebrew/unpack_strategy/mercurial.rb |   1 +
 .../unpack_strategy/microsoft_office_xml.rb   |   1 +
 Library/Homebrew/unpack_strategy/otf.rb       |   1 +
 Library/Homebrew/unpack_strategy/p7zip.rb     |   1 +
 Library/Homebrew/unpack_strategy/pax.rb       |   1 +
 Library/Homebrew/unpack_strategy/pkg.rb       |   1 +
 Library/Homebrew/unpack_strategy/rar.rb       |   1 +
 .../self_extracting_executable.rb             |   1 +
 Library/Homebrew/unpack_strategy/sit.rb       |   1 +
 .../Homebrew/unpack_strategy/subversion.rb    |   1 +
 Library/Homebrew/unpack_strategy/tar.rb       |   1 +
 Library/Homebrew/unpack_strategy/ttf.rb       |   1 +
 .../Homebrew/unpack_strategy/uncompressed.rb  |   1 +
 Library/Homebrew/unpack_strategy/xar.rb       |   1 +
 Library/Homebrew/unpack_strategy/xz.rb        |   1 +
 Library/Homebrew/unpack_strategy/zip.rb       |   1 +
 Library/Homebrew/upgrade.rb                   |   1 +
 Library/Homebrew/utils.rb                     |   1 +
 Library/Homebrew/utils/analytics.rb           |   1 +
 Library/Homebrew/utils/bottles.rb             |   1 +
 Library/Homebrew/utils/curl.rb                |   1 +
 Library/Homebrew/utils/fork.rb                |   1 +
 Library/Homebrew/utils/formatter.rb           |   1 +
 Library/Homebrew/utils/gems.rb                |   1 +
 Library/Homebrew/utils/git.rb                 |   1 +
 Library/Homebrew/utils/github.rb              |   1 +
 Library/Homebrew/utils/github/actions.rb      |   1 +
 Library/Homebrew/utils/inreplace.rb           |   1 +
 Library/Homebrew/utils/link.rb                |   1 +
 Library/Homebrew/utils/livecheck_formula.rb   |   1 +
 Library/Homebrew/utils/popen.rb               |   1 +
 Library/Homebrew/utils/pypi.rb                |   1 +
 Library/Homebrew/utils/repology.rb            |   1 +
 .../utils/ruby_check_version_script.rb        |   1 +
 Library/Homebrew/utils/shared_audits.rb       |   1 +
 Library/Homebrew/utils/shebang.rb             |   1 +
 Library/Homebrew/utils/shell.rb               |   1 +
 Library/Homebrew/utils/spdx.rb                |   1 +
 Library/Homebrew/utils/svn.rb                 |   1 +
 Library/Homebrew/utils/tar.rb                 |   1 +
 Library/Homebrew/utils/tty.rb                 |   1 +
 Library/Homebrew/utils/user.rb                |   1 +
 Library/Homebrew/version.rb                   |   1 +
 Library/Homebrew/version/null.rb              |   1 +
 Library/add-typed.rb                          |  27 +
 856 files changed, 884 insertions(+), 965 deletions(-)
 create mode 100755 Library/add-typed.rb

diff --git a/Library/Homebrew/PATH.rb b/Library/Homebrew/PATH.rb
index 8fb2269987..f9c347d6e8 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 5d8b89ed5a..829b1da118 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 6caee8c39a..2240161dcc 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 a5e3740184..f7c4274874 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 ed6f319730..6b4e7f0529 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 f4f51be48d..de78b09472 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 6dd3768aeb..982f15c482 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 e39f0328b1..f4b32a21fd 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 a86b3232ed..bee610cfb5 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 1a6b019002..50c2b325e5 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 053294e7ff..1695a257a5 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 9cce7ed341..b0da73866f 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 01cbec77f4..c2ec38df44 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 3d81ab65b0..f6b350a82d 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 c22c132d46..1fe7cf108f 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 a1f817ca7e..a8c7d55450 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 48b2452455..545389369c 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 03fded17ff..50749b2bdd 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 164731c166..caa2fcc7ba 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 9cd6b36239..79b3acaadf 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 7ec14f611e..c2fa6543c5 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 6e22874a46..73c655a52b 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 66453f2dba..3824296cbd 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 c11cb9cc4b..226a01e1cc 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 5925b86f4b..083c612447 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 c70f2658dc..9b5b5f157e 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 c672057d8c..00d170fda7 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 f6f8882c71..0b7f21c8ec 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 8447c67c1d..aed47644e1 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 30588c6236..e0c26a6dc8 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 3f0da05eb0..5c9dd0dbd5 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 f8f73e7021..c52e0361da 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 9a92a6506f..901cb5ac07 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 a013388e25..c67cac6d3b 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 be8f348205..a236a602e0 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 1feeda027a..68e8dbe181 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 00b385e647..0d924446de 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 e82690d84b..bd69c57a41 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 058ea50521..976ae18d68 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 6967f922c7..80485f23d6 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 cab1b48dbc..09bde070a7 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 264c04b7a3..a201c4fe30 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 2d1dcc5706..1cd57f9060 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 bb2b932793..8858922a0b 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 8946c3b58e..8ec015a931 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 e2b3841c36..ab9c1b4dc0 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 38795bffe3..5c62cb73ea 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 81d3acc7de..613841f7c3 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 4a55567258..cf4ca79a0d 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 b15b9acc90..7ccc3937b7 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 c9f1dda0f0..6deeb84f8e 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 3d731b1d6c..fb79443000 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 c190161fa6..7ae14dc7d5 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 dafc4e5774..0c80dcef21 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 bbeffbf730..bea10bf630 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 e42208a31b..d9b3351832 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 fee20683db..721ac40842 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 291256519a..8087f21faa 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 683057a13f..e4e0797f72 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 a532bb521e..a5ad63d19c 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 edd33fc2df..2091f48f95 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 c392d508a3..2c473cda1e 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 208464eda9..859d650a9c 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 231648c09f..ff35a1f2d6 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 c1e066bb1a..79e0dccc44 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 fc3cb60188..1d07156306 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 89a85cd20a..8011193348 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 e83cb4dd39..daf7536894 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 c2e981301b..2898883ef6 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 04a71b9e3e..9f35320378 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 dda4326ba6..8cbc9c37a2 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 16c1dbd81c..12e8a575ff 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 2f8b2c8cfd..6ea0099400 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 1c9ebc3600..c29a798192 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 f8d40aadd6..d1a29f61d7 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 d9933d992c..26d8d7fc79 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 f49f3a0620..da47113ab5 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 60cfbdb44e..22c146f319 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 a3721b0530..f786366095 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 cccfac6c9e..209533ba77 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 eba210668d..d1f0e57098 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 fac89d764e..9dc523b05d 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 770fc680a3..d35da3f51f 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 53d58b9961..a43658b182 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 e67831d383..645ea8a0e4 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 6efeeada6a..a5a43851b6 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 cf65def619..be2693b239 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 8c12de10bb..4fcdd23f27 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 f015ee9de8..b5e625e6f4 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 a90a7ea942..14e74c7af0 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 73dd826e9a..76dd66323e 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 bfd8573827..79c0485bf4 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 723647ecfd..92aaaf9779 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 8cee597600..47f804df23 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 f31d234c42..65f9998dee 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 96137a1a17..3f38a25fdd 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 01ad2bd278..18392648a8 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 84c6c62342..7a3219513d 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 d35ef9b7d1..9cf117c777 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 bf0f424ae1..9c53b91726 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 ab5d2579a2..1a779dcbdf 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 362bd1f7cc..dad9e9b22d 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 179c4c17a4..913cfbc529 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 240d145dfa..3a52708065 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 a0964ad7ce..b53574fd0a 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 e300df269e..2af781142c 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 f25dc0bb06..45b609ca53 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 01fd584ad7..b451a24f7b 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 211f1c0c2f..042c39b36d 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 037a8cc752..93595a9a3d 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 4c8ef458f7..957b175b85 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 1a51405ecd..cbd284fc2e 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 66fe520342..c0294392d7 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 29fd687555..cbcb36a495 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 d0519bf4ac..562d9a9f1c 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 2a99942008..a5f8ade23a 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 5c1e143d21..e9616f1749 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 43eb385c2c..5d10f9f655 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 6d306af2b0..9baa5cec4e 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 b40b299af2..0947d43039 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 acd6849ca5..bcad2600c1 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 8d3f2d7b70..2c147bb6d6 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 0807ee16be..d715e89a52 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 2b62240616..576c780dc4 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 1768227b79..d84468f5fd 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 2ec520a894..ad48c17792 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 3e55a88337..40f5875f9f 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 347467641e..f2d8b1c4e1 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 df28df344a..f400036c78 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 73909a4229..4345227585 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 4c796ecd7a..6ecc3c7fc9 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 e6f148d8fb..d5c5458ad9 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 5fab772549..0ca4458d92 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 7b0a7220cf..1b4885a36a 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 a4f1d47a5d..5bfa660543 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 1c9d62a08f..93e4c12936 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 2464cd1f44..1bd005c8ef 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 33a15d1c1f..94389f2b8e 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 56a099d12e..6c01e4172a 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 0e2d0cbca9..df6f428ff1 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 2cfe6c600b..41a0117c6e 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 b727164827..080bcd1636 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 8a56ebb6ca..77bf7b1576 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 5209dd26c3..b8f6a93016 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 a140e10b27..e0a5877b9a 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 a8fb5fb682..c2ece9f42e 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 b63dc064bb..8b2f912436 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 4654d4e580..bdfe4a3398 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 d14810694a..04870d0a23 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 ee9e3964ad..c1678d1596 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 5bb5461c09..21122e4c35 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 0e5bb02894..5e521a4367 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 a786035a8e..bdbed56112 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 82a0faa8a4..0f08e86d9f 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 b03fb503e1..3619e88c02 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 ba6b77fb05..4a23f7a6c2 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 8afd2cdcba..abb4673f6b 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 275d69b308..ab64aeac96 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 ca19f896f5..50ffe89799 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 6cbc3709e5..feecc8373a 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 46407ed5bb..60c354af1e 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 e2754c51b7..fad219e565 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 6382cbca0c..54a5b9af03 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 b88aa44c73..6c2d285c13 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 89dfe083c2..3d036f41d6 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 07d79190d5..2764048ce0 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 998cef14a2..98507958db 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 29a2284c7f..c98d46b0e6 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 7420c2003b..80b8dbab0f 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 3423f90e30..a1239e0aa8 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 c90523abce..4e2d3e7e25 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 6ba21bed47..8f980de1c6 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 c6c7b47af6..3f72f021c3 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 fb282e5f80..e9b9e4b157 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 6c9fd09cee..a9ecedc589 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 e005a7e4c3..dc4bb5a06b 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 d66585b966..aa53caaf47 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 3df802b351..543d751863 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 4d7ef44a9b..3415e03e6e 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 cb928bc577..7c2f6e37ce 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 85b2f857e7..1d45047eff 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 f58ae2fa9c..6018ae1e65 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 698a131ba0..9929ce1531 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 f10ede111c..f64973e172 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 ef18d85018..b5e7ccaec1 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 20ba27eb71..b15b49ee97 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 fb91ecc63a..c5a0a29b8b 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 e090e413bd..631e9ec65b 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 89fe49ea29..d177768026 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 cea445b3d7..0a17cdc96a 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 c8dfa5df5c..7790c32fed 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 78c4097a12..40c4007f89 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 55d32abf5b..86b675293b 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 3effc9eaa2..0c4c0d7219 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 67186565cd..566b4e020f 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 3abb9b9ab3..2c40d0b7fc 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 045e1c2418..ce279b1f80 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 76266028c3..7288d85e12 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 13477d5f6d..4e4f014d08 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 3cfb769484..a1f35adc14 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 568daa9452..0e3bece7d2 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 26da075aa8..8b3d5439a2 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 16e46f2784..7b587570be 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 50c052723e..087f5f5510 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 7512cabb88..428177807e 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 98825c6698..b4af45936c 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 e4b5dcc486..e88b9ef2cc 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 f22b836239..6d11bca358 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 c5ce307a66..e109887bbc 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 d05f445ea5..c2c6b0f60b 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 d702e7df69..c336427a40 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 b64c7b9312..c0e0c33965 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 2b9f166981..4e48e08874 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 064c422245..35950630b2 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 747906d200..278cd0f3e9 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 35913baf0a..56c3b15875 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 9d0835167d..17a6fd1227 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 e2367a0c11..6ce7864e6a 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 8afbc13974..30dfaeef20 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 4bbe7e054b..b30a714bf6 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 7545096485..c90e9ca474 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 495b538bf0..56a8ced860 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 ff6d7aec57..09cfbe68a3 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 21080e1fe7..f5d36dfc84 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 5ba8ae7e0f..173bfcc385 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 d59dcbeca2..fb52d37056 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 b9426c9d5e..653fc2d190 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 6dddc2a8f9..75bd37fed5 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 0fc9822e77..2e318d7d5b 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 b73abbdcf2..58a3f23994 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 61385fc5c9..58e4f580be 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 d94fb033bb..066e48505e 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 ee2c60f12e..1109fad7a1 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 4fa49e135b..8e2b4e3e5f 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 e7d197638e..e5349464ed 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 fe06aea8c5..5a520cf8a3 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 85bf7f77b6..35cac0c902 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 b092c72bc4..ebefc4b5f4 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 f23d41e4a1..07a3382eba 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 8e93626dbe..0bb64629db 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 7b321b1b97..5e3cdd073a 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 2107c83884..6330de5383 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 03e20040e8..3c1c0372b3 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 4fe4204f6a..3e8904e5eb 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 21d646c0b3..230e2a8cac 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 cfad51c4c4..c019b67f09 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 590c0e0d77..4e3bc56c9e 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 355e7e8cd4..30c48e55d7 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 b16178cac6..661725a6d2 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 ddef1ee7ee..fb287efc33 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 b5ba7e450e..a3fda016ef 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 7b4bd63719..c3bca7f316 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 e1562909aa..6b96d548c0 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 00a14f98b8..fa2e499452 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 e51d656280..badc19f507 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 2184287f53..a905cbca7a 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 5d25692fd1..b4307b71d9 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 30e073513c..7720cc0d2b 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 e9278821e0..62c2353250 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 1b1b6347c6..aa643d9ffe 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 518a7ce645..1a2ed81272 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 a5af426c05..47f3801dd5 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 12ed0de45c..7d118fdc39 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 0f76a99d2b..154c805a1a 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 4a3ab97092..9f214a40ba 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 00058e64d3..b4aa28f00d 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 dae8d90b07..6de89386a5 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 35b6e374cf..9f2425ca28 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 5db3b5767a..5efcd96d81 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 787196472a..15ea337b26 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 de7222f907..7b05358af4 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 476d30f752..633768d805 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 e6829a57ae..eceb486719 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 6bc4edcc4b..999c916b70 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 9289aa73b3..b208bf5b69 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 dba823599d..b9fbaf8242 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 60c9649408..1bb8f462eb 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 0635fce91b..a70d6f3bc8 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 c1edebfa6d..ab53b4fd48 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 308e94ea0a..0038423b36 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 5fb0fbe0e6..504b5c134f 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 d9a88c6584..b55deed223 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 a92b386ece..0096bb9c91 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 cceda91550..cd9ce82328 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 f8130f7589..4390f50675 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 bcdfabdf78..bdf2d9e933 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 5c0f5cb9c5..647c485b73 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 2c53218564..2947a85a3a 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 82cf08b5c1..f25e05c43d 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 e3c1de519f..221c0c4ca6 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 da6698fc53..3ea619e2db 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 fa619816d9..d90cdb21f5 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 3e624df8ae..ceba5b2649 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 1b9303918f..3986d0b940 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 b77e642741..4eb794a1bb 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 58e109e3f0..131f49e6a8 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 6ddbc3e6d7..af407f1c44 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 85c36f1aec..cd6faa271b 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 eab9176f3d..318299549f 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 5389f38a19..df7ae3481c 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 9ad337890c..aa6d675154 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 c6909a0fa0..96e7ff28ec 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 b4aea11442..15da2d0e5a 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 9c06e9a02c..71298e98e7 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 82e0a09f66..7ad0ad531e 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 8598bbf462..f0042d78c2 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 fb3ddd9659..9d45d5f5ef 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 dba7f17b5f..914244d5d3 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 32d403e21d..d68d678970 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 717537cbc1..6297b5d628 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 1353104766..53ec1ee33b 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 fdcfa86573..05948f3a2b 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 7c71590d28..7d7a31b179 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 75ddba1483..f30b7082ff 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 2067ca287f..91e94da609 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 9165643948..367f7e6947 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 b6c38e128b..1ff0ab1712 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 613a51fc81..0a0d097c25 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 521621711e..67569587f5 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 ecd67d5270..c33726de0e 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 4bc1e446ca..2421b1d1bb 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 ac124aa09c..667f765433 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 ea63270b27..05b5d08ad9 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 8b577b8c82..66e38c3576 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 17d406957b..f00d3fc402 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 ac891273a0..6018da8102 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 8c8140190c..902ed12f38 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 1bdf422dca..b26b5a7709 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 2b4a0399d8..22f851472b 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 964fa4f773..ad959e7e7b 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 fb9b7b0119..a67d52b10e 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 4f53e485f8..fe16e5a141 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 c81ef65c51..3714b71407 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 d24e7c4ba7..8a82706e19 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 8ea44995eb..ace7e5d9c4 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 6ab77998ed..90f2bccdb1 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 9948086f22..74bcc6b2ab 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 c72818dc38..df31c5f455 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 d5410b25fd..466dd95e09 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 aa6d196ffe..4111365455 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 5e8cb9e122..52beb1686f 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 a696d21252..a1e29a544b 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 f93127af9f..5a1e5edb15 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 72a6c68ff2..fa1e952300 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 396c7e25a6..72dbe47771 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 4f0303fe68..2c2ecd69bc 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 b9253521b5..c38d393f28 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 3f2520d574..3c661f155c 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 3e9ddc85f2..73c80beacd 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 4c10516eff..6fa15dbff6 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 336d32ebfd..88c40d5c24 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 f9de6660df..5517897b14 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 ea9f8a2306..258265213c 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 c858aa03b5..278bb621db 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 88f017a170..7bbabfa733 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 18187a8447..bc8c64b501 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 ea2b525ee4..5a244e6450 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 bdf05f93bb..c60bf82615 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 c69de457bb..69c76c0aef 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 716c3d269c..749b8a2157 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 b19ed5a7d9..a518cb8db0 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 b486d3dc27..9e4a229ed1 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 4981f12b53..2c3199b81b 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 9d6250c235..bbf58536d7 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 c8804764a2..17d2fee346 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 c4d8dae4cd..c38fed883d 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 a42ee092d0..49df817c37 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 f367a86dbb..df09e17ca1 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 1c20ce5a14..fd535699bc 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 8e9d0d33f3..2ed8d45282 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 8ade3fe0c0..f7cca8d697 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 0782226c00..b5805975c6 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 aef8164268..7a6a75c318 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 ff30e3eaa2..502e9adc39 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 3aadfb95d7..c8a899cc45 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 7d78b855d4..e81979622b 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 98858392d1..21bed29170 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 0934b436fa..61d00d6a08 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 cd74821087..c8aa68b264 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 5f85cfbb89..575a27eedd 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 d1e0a007bf..5075767249 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 1f746aa6e0..b763cd03b5 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 d4bb330119..a6d8545cb0 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 4358f1f2b6..6b7b8251f8 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 dc9d81320f..d4499ee065 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 dbec98dba9..54fb9352a2 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 d6ba1a9332..a519a2cdbb 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 04b644a398..a744caeab6 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 6013a1a1b7..b9d4fbc556 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 8371568fa0..9a4a0f527f 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 6f9cec4cfd..40075a947b 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 f34834c2ff..4fe5c98538 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 97e1dde8da..533b3e8515 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 ba6ddb6ebe..29655d120a 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 b2b748bb03..e5c5651439 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 98e97c0c34..c05f109723 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 7646552eec..a869967a5b 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 8a6b7a5452..85f0de5cc3 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 f4de0f3139..3b818ac900 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 90ceefab9f..0e03da6265 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 8e179e70dc..e0102bd9d1 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 73ac1a98ba..6dcccff830 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 7d80c6405a..3c12c14ac1 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 220acaca83..a3a18a9caf 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 9dc0800c9c..aa2d6eab14 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 067b6c30e4..759b899d67 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 f76d258faa..97607aa568 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 6e21cd85f8..2d2aca942b 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 b49101e63c..93e5ba21ea 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 41b818df6c..be6af752fa 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 f81c4fc26f..577f49ac79 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 fda9de60d1..35edda879d 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 56ce23cff1..d44e759673 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 d939a8ea36..41b35478f0 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 1e51ef0831..767306c759 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 318a79d47b..f11a9a870f 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 7f24d8087c..fb77e88d56 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 79f21dcfb4..f077a2b372 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 eddbac5b6c..f0675de949 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 d4454ad4cb..7ee1de87d5 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 57e5066e13..f839e5571b 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 0ea79d8e42..d1e3b06d11 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 6a578b5f7c..3b811f07b8 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 9f7dfe437a..9cb7dc7a13 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 3bf74d1c83..c7f21adb2a 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 907a98c18b..f971548bd6 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 03c9aa8d14..6ed4157c5d 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 646e483994..fbba19daf4 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 22113414dc..a3beae3e70 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 8b7388f94c..5fc65ced98 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 b8fa914e4d..30417d0edd 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 b23883d0cd..83db786b8f 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 a71b6666ef..e164640615 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 de47a9d290..2b6b53c011 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 a0ab6c2141..5fdf3f491d 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 29fe98e8c2..942083a1c9 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 9b9adc7606..634b84b561 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 91ff124c09..06f419608c 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 8eb08f59ae..b3db036f73 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 1fbc2420e7..437df8a775 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 89307f7c33..33f3781d7b 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 a377e3bc24..5af0d7dbd2 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 8283d08cb0..099eb3b1e9 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 0ccee1b2c2..8c6fb892d7 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 c375ba8dc8..1da9c0e571 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 735775fc30..82cc34e692 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 9a91960363..c0f5cfe768 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 eda4461f64..68357d4b85 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 b3b552249e..3a7827c853 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 2a61f8d476..6163265a85 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 f7db07f96e..7d95739ea9 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 e5bc95da36..79f8a57e85 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 8bfede1f2b..f7693171f8 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 0365b3423b..2b122fed4c 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 ed0e9d4591..a31554950a 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 add9b9dc56..4cb1ad17fc 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 230046770c..149eea835f 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 d783a48b4c..67420059c3 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 6bff500bbc..1feb893391 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 e94e9a8ce1..5cfacd2b2e 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 19087acd94..49ae668d9c 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 52cd1bf0ca..21957b37dc 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 7546690b0a..543ff90b4d 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 49d86dae22..fc91356cfb 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 7cf983f053..61144b3679 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 1f63083855..3a5371e3b2 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 ae2cce3f91..31b14aa7f4 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 cd50589dc6..7ce9297f4c 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 0f1e7da7da..1013d9fd44 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 6b0f9f4a38..497780f470 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 86fa8061e2..297a2ab32c 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 41836b9a1c..c956d089e0 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 cb8e021523..c1708d6946 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 b0ca9658f5..6badf576a7 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 18f2fc162c..2a1bd90fc3 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 229edcc598..5cde00d829 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 645e666ca8..6fab5cc170 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 d0f0334632..d8fa5cb425 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 5351f93e54..1f913b6701 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 e6a7d8fd14..18d390ee74 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 35ecf63318..bc68dc9ec0 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 f94229f279..5774a6d59c 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 3828d4d95e..3022fc323f 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 585d7ac84e..7c051d9d1f 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 cffb1f7806..9fe4fbd77b 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 5ae6ed8f10..1dfa416953 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 2ae1624b35..6850fd749f 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 ccd7317e61..8b93c92fc3 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 467a1be08d..f344ba7703 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 0e68acc85a..a3faaff589 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 32ce90aa2b..7862cfd519 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 f5c330615a..8158d1c114 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 3a9137657c..e930e00b7a 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 66d90c58a3..f5549f6f9e 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 e715d05671..d034437fcd 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 412d5f5b85..86cd911675 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 059685af36..71733db4b2 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 8c34b5988c..65fc182c15 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 d9424987da..e00f472d27 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 a3b1cf671c..ac7c1f6643 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 3b14811f7c..a9b3919a42 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 edb411f312..259921fceb 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 caf977f526..93f1a60174 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 c46715d516..f97d2c29db 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 a4d29f84cf..b6490e825d 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 77129641a1..48c7653d5f 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 fa744f248a..635c35c030 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 cd1683aedc..12f5db7dad 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 0ef5993221..43f7dea992 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 a7b5045bd4..b15bf205cd 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 2635e67f17..92f5c332ef 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 486ab8f822..e98face38a 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 33c8f7a975..779c995eb3 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 46ce8ad5de..8acc50baef 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 313a67a61b..9f094157ee 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 b0ed28814d..6423eefed4 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 7dc8945810..7904eca061 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 7f3109ca40..b1a7a7f624 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 bba23b7b81..f3ec58552e 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 cb15b9cb1b..f8c363ad44 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 b70a67acc3..29af7187e1 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 0b6ce6e427..d678b332cc 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 ea8c263fc7..6f8acbb945 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 058573ac02..769d95544f 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 5919a2f6a5..1bda2bd9f9 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 2f94f13100..d7cd44dbc2 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 51c34fe222..527581f5f5 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 a6d351d903..cb2f750247 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 3650b7d44b..7d9d71cd8b 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 4c15cbe966..519f366c42 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 63bb8f509f..7021ea70eb 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 675ac09e93..666854d972 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 54d66f74ec..437f8a6277 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 8dde1ed83e..fb049969e7 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 2c454e14d5..df5bed7910 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 b6aedd83ea..84e735de63 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 f63454712a..540b82c51d 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 3564842262..c9e7898dc5 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 eea6caab79..3d0bb60203 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 a49cbfd8ee..237a769b3d 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 490373c7d2..10a9d0d30a 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 b94d8a7ef1..4d0cf035d1 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 7fce3ed4bf..f0bdd98109 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 668548fb7f..d2276fdb71 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 70ba941c78..ef100add41 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 ee56b3cbe5..4962a75603 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 67748ae138..650fbb046e 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 e12a8522d1..ff438b222b 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 7ed48a2d1f..d989c260f9 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 8c8faee079..fce8954712 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 8f5a3382f0..0a5a6bb7b4 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 655c3fa0ec..9a3b495165 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 ade9717205..ba4becf50c 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 a34a3e21c8..ad42715a3c 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 ed676f5588..9be2e1288d 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 245f1fde68..046a8cbf4c 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 45b5a48ffb..f88fd0d3de 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 43b1cf9a39..724a3ff0b9 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 decee40faf..65d00d5d79 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 d8b7873b80..1df6117ad1 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 d50f993e47..b568e53000 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 d03ca17843..e2c1bebcac 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 c90155e085..e54e91a5ff 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 999d38f547..9d79d3e7da 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 1489393165..090a091a0c 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 be3faa7c85..e1aa11d677 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 7a33683d46..d637d960bc 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 d073534313..548d0e8457 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 9f139fc059..f03b919a9d 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 8321777bab..1b1341067c 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 25f6955c91..b4a672191f 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 08763e33cb..4ec13cc57b 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 f00c58addd..a2ab44b943 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 0cd0b2070d..e16af54ec3 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 2beb3c4570..61b153a3e9 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 4686084bce..4f3ab714db 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 07da34497f..b9b5ae7c60 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 5bcefadd4a..aa673a2339 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 c3a1c4b7ea..b0e5b8a6c8 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 ec772097ed..3c606c86ca 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 a5855a9cef..6b16ffb6c4 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 01aa00434e..e1afb7ec8e 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 1f730949a6..315066bc5c 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 1acbf44802..c524f7d342 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 69552cfd78..02ae9e8a9a 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 9cdc95f9a3..08d0907501 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 3d025d0b5c..51324ce3e7 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 81b22e319b..33e4931f7e 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 2a9132e768..fdeb97091a 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 1d71661f24..5e6ecdfbe9 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 e4e98c2074..54edd4b9e0 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 5168cf5522..eafc466f31 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 df88019fa5..2e8a96ea6a 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 c12c4eb06a..5563f6079e 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 d9e96bc7b9..e52fb82670 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 666374c879..1d39e2d70c 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 f083b5cb66..1663e42c42 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 4bbee4693b..9bd0dfee50 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 07eab3a255..29523d832d 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 4ad0dc02a4..bc6af40e28 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 d0230d13a0..df6b0ef668 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 f0b8e25cd6..f0021f0f45 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 f11823c52c..848323c00f 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 69a5f27c17..54530b6095 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 c2dc0b3d45..f4a3990e89 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 bbe9bff874..21d1b29790 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 42bb98c1fd..ae13bf021f 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 52000a549d..8fa4a72a0d 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 667dff55b6..bee8458429 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 2c0164c9f9..0fb6f90c1f 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 24e83443ac..bbad80d12f 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 866230a703..81f46c177b 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 8fef2f67f1..31c8c3b7fe 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 0a0c27eeef..0799686914 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 d9be457801..734ee4545a 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 ac08d29470..dc6b9b1060 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 5fd14791c4..bd2c17beca 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 3f5f6c07a8..120294835a 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 cdc65adb98..47713b155d 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 513ff7a503..2b91937619 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 8bb4266ad7..e938c843c7 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 fb348213ac..9e8d214f70 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 04320edf5d..84412d61d5 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 4e1f416529..0e8bcebb10 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 0a6aec0f0b..b42513f75d 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 bffafdfe7e..0e84ed74a5 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 03e83da672..04e371cb47 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 82ef571953..453fb312d2 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 bdaed0ddd1..c16c13ad5c 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 d20fedddf5..6fcd00f439 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 c178201585..30077967f0 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 bbd6aca88a..b8ca07410d 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 5ae60e6662..6c34ca8838 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 343da43781..f7ea9243e4 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 9389c0a311..aa80fddd0c 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 590f27a1d0..42a065faf2 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 060ceb2d42..4c81962a16 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 ac631f38cc..b2c3212ad9 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 217eb792d7..4893a272ce 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 79c3cf2496..3907b96acb 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 5a59f162b7..8dbffe0b4c 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 174373d999..6fab0b50f1 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 57ca637fa4..f9520b83c8 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 51dec2b1dc..9e9c53385b 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 68d95cf90a..5bbd943203 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 b44ca71ea2..7bd4d9ae1e 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 2026d157a6..f5c2df857f 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 366ed35586..9a0996a2d8 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 79145e02c1..4edf101613 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 82cfc98c73..63e28de011 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 63e3346bdb..11a35d7ba5 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 54630bb5d6..150c547784 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 3bee724891..2612434283 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 1b615b2467..96bf43ad53 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 b8c49817ec..e8a4ba1b87 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 8ca98945a3..c37c9cdc2e 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 7db151cc78..664797732b 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 de0869a700..a2480b3403 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 e5ed4a57c9..84ed8df539 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 52c0e6aeb6..05a433122c 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 f9e9496489..c8aca6bebd 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 fa97096d12..aa54d406a1 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 e17a4bf440..1c21b93ab7 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 4d88dfedca..14fb5bdcff 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 b864fe662e..fa180493f6 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 b13b458d20..3baab3f2d4 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 185eab89a5..8c32c83198 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 7ef64aecd6..806e4a3f77 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 7e4126585a..cae19a846e 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 eacaf971fc..eb29d478d5 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 aa44899d50..de6ed40659 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 05f15cb809..b33878dc4d 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 65729b23bc..4d83a58898 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 b70068c953..6ce7bc0758 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 c10a661f9a..1bc6f59f97 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 fa8a1de35b..4b0e2abbba 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 af94ef6f52..e716a7624f 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 3f332ed5aa..efd0938571 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 e3c1aa8cbb..d7fff66b2a 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 1e671f67a5..6d60525810 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 fff1fc48b2..1708cd39ca 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 737e140676..1259ac7c4a 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 fe1bddbaa0..383da9fb79 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 ee8bedd610..61344d094e 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 ffcb3a8de1..018496b036 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 483104bce6..0f22b9f67a 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 969532d0c7..59e4dcc645 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 f328579fa2..78167a4d87 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 b966111262..488f8c1f04 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 8c38a45884..4b9632a389 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 f20e7bc9ed..ae6bfdc2c5 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 fd4e591014..260bd9c50c 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 a5750a430c..83ae2ddf68 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 d76d37b6c7..633db2e1c1 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 dd175cb4fc..4ef084f3e1 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 81fea8a007..05d98bec5a 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 2f6d5747c7..a8f1c574e5 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 3a11d6be0e..8654a49606 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 21cfb53933..3cce050983 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 c10ef5bf5a..0afabf0386 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 a19e8ab8f5..a2b76acb80 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 0d3f0e5420..460987283a 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 06a3c94704..1f0c84ab27 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 cedab62228..098e782546 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 4eea2dca3f..5bb778d298 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 6a1a839ce5..3d2fe41462 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 5863686c3f..8d5be00c2a 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 4756a361db..afc1da7e32 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 83142a1b51..746b4212b7 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 5d85184ef3..47c518537f 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 fcdc6b9a11..cfabcb0921 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 2f0af35aab..16bb4c6234 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 fa61dd9a64..a5b3cbd69d 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 5bda3ac2c8..33bb7cf2e0 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 7b8a5823ad..e1d9981980 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 f1bbc3d37e..41d24cc512 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 3960272dbc..c308451b19 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 e36f40493a..0be3154ee1 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 d74cb57d27..6a12800505 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 45ac7ecf1e..cf36fea015 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 f3b323eaf0..10f4abde6c 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 0f3bfbe6a6..84377c4757 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 6fdb4557d7..f7e059ffb0 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 34278b48e4..965fca8cf2 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 406ffc7561..dabc1816de 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 646d53765a..0442c620a2 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 abe5e23b8c..d187cbc19d 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 5ba1692eff..e4a15344b3 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 27ff8dafc0..1a99de2914 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 76d8d7e7c0..d3f159eaf9 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 7010a4d93f..6f019f9baf 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 940e80a4f9..6dd863daab 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 47080e6419..2587e7bc52 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 19ef9594e0..18c083059e 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 be2570a0c3..b5859c174e 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 8be3998c18..eaa659e8ae 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 fc5cf48c8c..2dd4b4c657 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 caf4a1c73a..256ef05e54 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 2e4ec4b266..245a2aef0e 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 6cb369c414..f6cc4282c9 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 ca7f4ca662..24b25fd89f 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 db6836796f..760bd80147 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 aeebb8c14a..3d18361e9b 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 b005657977..e52610016f 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 a9c6769f70..b68490628b 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 d6199bd9a3..493883e8b9 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 bc48fcdd75..8d37dbf57e 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 5c5506eecd..fef1692deb 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 b4005db52d..355a1c1838 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 d4263d126f..78db926675 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 434a76a948..0db95af39a 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 a81f15bab1..126985010d 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 8eebf17da5..2b9ebaa58d 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 dc321a4644..ae12a37704 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 8a3594f144..7b30d119c4 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 738146a787..b3831b731d 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 ebf4a493bd..0f85ad24db 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 f6da64b973..042f9bf01a 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 e24a60a655..18921910b8 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 a74b68add5..cd4932c915 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 76a28e27b0..c29066ff78 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 c612b13f03..09386a1771 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 5e5e593339..9ddea401fb 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 6f3caa475c..3c034d0086 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 78795f94cc..d1baca44bb 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 ae11929b32..078762a124 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 8e8c5d9236..857ac134e6 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 f4f11389d1..28870a2d78 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 ffc41369ae..f6befa95af 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 c579fff51c..dd27c5de48 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 bfcbc24216..055fe3c96e 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 cca36c8360..588c35d3b2 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 87a9a7c7ea..eb96058337 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 897bbb57fe..d3eacd60bc 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 f83ca75ea8..3314db26d8 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 544e57bc1b..af153426b5 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 fa1d27fb30..330ffbeba8 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 f03f614379..0ec9310910 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 1951d5e56f..290e0f8550 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 6c7739ff71..4e785e7dab 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 41ffe71132..7f8495b343 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 dcce91d8b4..7ea5474e7a 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 d2fa37b05a..acacade360 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 d4844080bd..61c24e745f 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 01c02171dc..5530a27b4e 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 da6ec91ec7..f4ec8b7f36 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 b3569cad80..0b7ff0ee58 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 32b259e2b8..6f728041f0 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 c26862dc41..53c7089252 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 977852b6b2..efaf326603 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 04f4cdf3bc..ab18e0c646 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 436e0c15ef..4076f1a553 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 9540b4029b..f76069f3b9 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 47a2a7f6b9..8d6e73cd1c 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 3bb3c4d6b1..f50957a124 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 9eff311a83..79d25aaa5b 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 f36fa1f580..00b0831288 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 668272df85..8e83fa057a 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 36e4d506e4..66c2f17f8f 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 06d8dd9888..0e8c68b593 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 234dd802b2..1d2e8de5ce 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 57e99908f0..a592cce52f 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 ea7f2216b8..c8f165fdd6 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 5458141748..7b0a0a53bd 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 c704f13a47..23257c0502 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 8f576788d5..4797fbaa24 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 8fc3a70476..ee05a876a1 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 d3bfcaf87e..70c3e5f709 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 8517b140e5..1336b856de 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 687917cea4..a27663e4d5 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 006fcfb741..e14de8e993 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 7e0d3b64d2..4538c8e8d9 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 8c3463be08..5d97e6f222 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 17b55ed7a6..1a0538d942 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 df77933191..5aca009f53 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 89138e5779..e914d41baf 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 8dad4a4436..20bf5057e8 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 5863b07422..71e2dd66a2 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 9de9120b02..c74166d771 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 5ec16b48ab..5fabbbbfc8 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 0c90b36605..dd3355825b 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 25c30973dd..7e7b407bcd 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 54c6a6bd82..b45755a428 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 ea7f943a20..1c869d998e 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 69422eb660..2f5f4794a3 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 29ac0c182d..86f50d2a38 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 e58e556c7c..09db337f84 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 0dbd0d1334..82f258eee4 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 e56867e16f..985a294bec 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 c6c1c9b8f3..9524db7218 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 ec47aa0c94..1b8ee163e1 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 4f517cc8de..db53efb9ee 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 6427193ce8..f7c16566c0 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 60e88c60e1..7835e93f28 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 0a98b06728..cdb688b5ac 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 ad1ebe7744..e2f592d431 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 f9605c0708..b18a203d11 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 111a9d6ab2..3dc7bf6401 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 ae3489b6c8..9d94ae0a81 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 8b3c6bb37e..8078390f60 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 25dc1c9940..bd08714def 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 eac4823c64..b721b3191c 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 eda3f66afc..d9bb621bad 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 7476b6b843..f1a017334b 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 3b607cdb20..fc8e483b20 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 0b956b88e0..694f659804 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 3e12674691..762ddf5804 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 d8e77a8dd9..4d9af01ff1 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 9420e343d3..64467c291e 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 1492b08319..239a63ca6d 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 c60c834da4..df29bf9adb 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 774d1933be..3360f99cb2 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 d40a7b6072..0973a95be4 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 cb1edd4e74..4c22d2f28c 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 7b63523b43..f2b74a35e4 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 0000000000..6860b9e7b2
--- /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