diff --git a/.gitignore b/.gitignore
index 7e6cc16ced..8786b176d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -135,6 +135,7 @@
 **/vendor/bundle/ruby/*/gems/simplecov-html-*/
 **/vendor/bundle/ruby/*/gems/sorbet-*/
 **/vendor/bundle/ruby/*/gems/sorbet-runtime-*/
+!**/vendor/bundle/ruby/*/gems/sorbet-runtime-stub-*/
 **/vendor/bundle/ruby/*/gems/spoom-*/
 **/vendor/bundle/ruby/*/gems/stackprof-*/
 **/vendor/bundle/ruby/*/gems/strscan-*/
diff --git a/Library/Homebrew/Gemfile b/Library/Homebrew/Gemfile
index 3390dc1ae3..57014db73f 100644
--- a/Library/Homebrew/Gemfile
+++ b/Library/Homebrew/Gemfile
@@ -27,3 +27,4 @@ gem "rubocop-performance"
 gem "rubocop-rspec"
 gem "rubocop-sorbet"
 gem "ruby-macho"
+gem "sorbet-runtime-stub"
diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 5acb823760..3c74774200 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -125,6 +125,7 @@ GEM
     sorbet (0.5.5942)
       sorbet-static (= 0.5.5942)
     sorbet-runtime (0.5.5942)
+    sorbet-runtime-stub (0.2.0)
     sorbet-static (0.5.5942-universal-darwin-14)
     spoom (1.0.4)
       colorize
@@ -174,6 +175,7 @@ DEPENDENCIES
   simplecov
   sorbet
   sorbet-runtime
+  sorbet-runtime-stub
   tapioca
 
 BUNDLED WITH
diff --git a/Library/Homebrew/vendor/bundle/bundler/setup.rb b/Library/Homebrew/vendor/bundle/bundler/setup.rb
index 1850491132..89d30e2fef 100644
--- a/Library/Homebrew/vendor/bundle/bundler/setup.rb
+++ b/Library/Homebrew/vendor/bundle/bundler/setup.rb
@@ -79,6 +79,7 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-sorbet-0.5.1/
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ruby-macho-2.2.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/sorbet-static-0.5.5942-universal-darwin-19/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/sorbet-0.5.5942/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/sorbet-runtime-stub-0.2.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/thor-1.0.1/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/spoom-1.0.4/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/tapioca-0.4.7/lib"
diff --git a/Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/sorbet-runtime-stub-0.2.0/lib/sorbet-runtime-stub.rb b/Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/sorbet-runtime-stub-0.2.0/lib/sorbet-runtime-stub.rb
new file mode 100644
index 0000000000..3d6e9b7a28
--- /dev/null
+++ b/Library/Homebrew/vendor/bundle/ruby/2.6.0/gems/sorbet-runtime-stub-0.2.0/lib/sorbet-runtime-stub.rb
@@ -0,0 +1,146 @@
+# typed: ignore
+
+begin
+  gem "sorbet-runtime"
+  return
+rescue Gem::LoadError
+end
+
+module T
+  class << self
+    def absurd(value); end
+    def all(type_a, type_b, *types); end
+    def any(type_a, type_b, *types); end
+    def attached_class; end
+    def class_of(klass); end
+    def enum(values); end
+    def nilable(type); end
+    def noreturn; end
+    def self_type; end
+    def type_alias(type=nil, &_blk); end
+    def type_parameter(name); end
+    def untyped; end
+
+    def assert_type!(value, _type, _checked: true)
+      value
+    end
+
+    def cast(value, _type, _checked: true)
+      value
+    end
+
+    def let(value, _type, _checked: true)
+      value
+    end
+
+    def must(arg, _msg = nil)
+      arg
+    end
+
+    def proc
+      T::Proc.new
+    end
+
+    def reveal_type(value)
+      value
+    end
+
+    def unsafe(value)
+      value
+    end
+  end
+
+  module Sig
+    def sig(arg0=nil, &blk); end
+  end
+
+  module Helpers
+    def abstract!;  end
+    def interface!; end
+    def final!; end
+    def sealed!; end
+    def mixes_in_class_methods(mod); end
+  end
+
+  module Generic
+    include T::Helpers
+
+    def type_parameters(*params); end
+    def type_member(variance=:invariant, fixed: nil, lower: nil, upper: BasicObject); end
+    def type_template(variance=:invariant, fixed: nil, lower: nil, upper: BasicObject); end
+
+    def [](*types)
+      self
+    end
+  end
+
+  module Array
+    def self.[](type); end
+  end
+
+  Boolean = Object.new.freeze
+
+  module Configuration
+    def self.call_validation_error_handler(signature, opts); end
+    def self.call_validation_error_handler=(value); end
+    def self.default_checked_level=(default_checked_level); end
+    def self.enable_checking_for_sigs_marked_checked_tests; end
+    def self.enable_final_checks_on_hooks; end
+    def self.enable_legacy_t_enum_migration_mode; end
+    def self.reset_final_checks_on_hooks; end
+    def self.hard_assert_handler(str, extra); end
+    def self.hard_assert_handler=(value); end
+    def self.inline_type_error_handler(error); end
+    def self.inline_type_error_handler=(value); end
+    def self.log_info_handler(str, extra); end
+    def self.log_info_handler=(value); end
+    def self.scalar_types; end
+    def self.scalar_types=(values); end
+    def self.sealed_violation_whitelist; end
+    def self.sealed_violation_whitelist=(sealed_violation_whitelist); end
+    def self.sig_builder_error_handler(error, location); end
+    def self.sig_builder_error_handler=(value); end
+    def self.sig_validation_error_handler(error, opts); end
+    def self.sig_validation_error_handler=(value); end
+    def self.soft_assert_handler(str, extra); end
+    def self.soft_assert_handler=(value); end
+  end
+
+  module Enumerable
+    def self.[](type); end
+  end
+
+  module Enumerator
+    def self.[](type); end
+  end
+
+  module Hash
+    def self.[](keys, values); end
+  end
+
+  class Proc
+    def bind(*_)
+      self
+    end
+
+    def params(*_param)
+      self
+    end
+
+    def void
+      self
+    end
+
+    def returns(_type)
+      self
+    end
+  end
+
+  module Range
+    def self.[](type); end
+  end
+
+  module Set
+    def self.[](type); end
+  end
+end