From 8fe207254db54a7714731482b4d8af7d98b8891b Mon Sep 17 00:00:00 2001
From: tufusa <me@tufusa.net>
Date: Mon, 19 Jan 2026 16:31:14 +0900
Subject: [PATCH 1/5] =?UTF-8?q?feat:=20`Module`=20=E3=82=92=E5=AE=9A?=
 =?UTF-8?q?=E7=BE=A9=20=E6=9C=80=E4=BD=8E=E9=99=90=E5=BF=85=E8=A6=81?=
 =?UTF-8?q?=E3=81=AA=E6=A8=A1=E6=A7=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 core/module.rbs | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 core/module.rbs

diff --git a/core/module.rbs b/core/module.rbs
new file mode 100644
index 0000000..d5bc92f
--- /dev/null
+++ b/core/module.rbs
@@ -0,0 +1,2 @@
+class Module < Object
+end

From daf0582bb9f66e02270b57f2bfe5adea3091a162 Mon Sep 17 00:00:00 2001
From: tufusa <me@tufusa.net>
Date: Mon, 19 Jan 2026 16:32:19 +0900
Subject: [PATCH 2/5] =?UTF-8?q?feat:=20=E3=83=86=E3=82=B9=E3=83=88?=
 =?UTF-8?q?=E3=82=92=E8=BF=BD=E5=8A=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/module.rb | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 test/module.rb

diff --git a/test/module.rb b/test/module.rb
new file mode 100644
index 0000000..0f4f360
--- /dev/null
+++ b/test/module.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+# @type const Mod: Mod
+module Mod
+  # @type method method: () -> void
+  def self.method
+    puts
+  end
+end

From 9a3d07acbde8985e7439d73e6a361e4009adf080 Mon Sep 17 00:00:00 2001
From: tufusa <me@tufusa.net>
Date: Mon, 19 Jan 2026 16:56:03 +0900
Subject: [PATCH 3/5] =?UTF-8?q?feat:=20`Object.#kind=5Fof=3F`=20=E3=81=AB?=
 =?UTF-8?q?=20`Module`=20=E3=82=92=E5=BC=95=E6=95=B0=E3=81=AB=E3=81=99?=
 =?UTF-8?q?=E3=82=8B=E3=83=91=E3=82=BF=E3=83=BC=E3=83=B3=E3=82=92=E8=BF=BD?=
 =?UTF-8?q?=E5=8A=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 core/object.rbs | 5 ++---
 test/object.rb  | 9 +++++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/core/object.rbs b/core/object.rbs
index f0a8776..e756641 100644
--- a/core/object.rbs
+++ b/core/object.rbs
@@ -30,9 +30,8 @@ class Object < BasicObject
 
   def block_given?: () -> bool
 
-  # TODO: Module
-  def kind_of?: (Class) -> bool
-  def self.kind_of?: (Class) -> bool
+  def kind_of?: (Class | Module) -> bool
+  def self.kind_of?: (Class | Module) -> bool
 
   alias is_a? kind_of?
   alias self.is_a? self.kind_of?
diff --git a/test/object.rb b/test/object.rb
index 2a828a3..a34c0c0 100644
--- a/test/object.rb
+++ b/test/object.rb
@@ -7,6 +7,11 @@
 # rubocop:disable Style/ClassCheck
 # rubocop:disable Style/FormatString
 # rubocop:disable Style/RedundantFormat
+# rubocop:disable Style/MixinGrouping
+# rubocop:disable Layout/EmptyLinesAroundAccessModifier
+
+# @type const TestMod: Module
+module TestMod end
 
 object = Object.new
 
@@ -43,10 +48,14 @@
 object.block_given?
 
 object.kind_of? Object
+object.kind_of? TestMod
 Object.kind_of? Object
+Object.kind_of? TestMod
 
 object.is_a? Object
+object.is_a? TestMod
 Object.is_a? Object
+Object.is_a? TestMod
 
 object.nil?
 Object.nil?

From 4bf65d0b819f021e059c317133a06601b9a3ea29 Mon Sep 17 00:00:00 2001
From: tufusa <me@tufusa.net>
Date: Mon, 19 Jan 2026 16:57:23 +0900
Subject: [PATCH 4/5] =?UTF-8?q?chore:=20=E3=82=A2=E3=83=8E=E3=83=86?=
 =?UTF-8?q?=E3=83=BC=E3=82=B7=E3=83=A7=E3=83=B3=E3=82=92=E4=BF=AE=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/object.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/object.rb b/test/object.rb
index a34c0c0..35b467c 100644
--- a/test/object.rb
+++ b/test/object.rb
@@ -80,7 +80,7 @@ module TestMod end
 object.raise
 object.raise 'error'
 
-# @type const A: A
+# @type const A: Class
 class A
   public
 

From 4bff2d868c3fb65c3701ace0ff8855bad9c05fb3 Mon Sep 17 00:00:00 2001
From: tufusa <me@tufusa.net>
Date: Mon, 19 Jan 2026 17:00:42 +0900
Subject: [PATCH 5/5] =?UTF-8?q?feat:=20`Object.#include`,=20`Object.#exten?=
 =?UTF-8?q?d`=20=E3=82=92=E5=AE=9F=E8=A3=85=20`Module`=20=E3=82=92?=
 =?UTF-8?q?=E5=BC=95=E6=95=B0=E3=81=AB=E6=8C=81=E3=81=A4=E3=81=9F=E3=82=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 core/object.rbs | 11 +++++------
 test/object.rb  | 15 +++++++++++++++
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/core/object.rbs b/core/object.rbs
index e756641..b41c297 100644
--- a/core/object.rbs
+++ b/core/object.rbs
@@ -61,12 +61,11 @@ class Object < BasicObject
   # TODO: Symbol
   # def self.attr_accessor: (*Symbol names) -> void
 
-  # TODO: Module
-  # def include: (*Module mods) -> void
-  # def self.include: (*Module mods) -> void
-  #
-  # alias extend include
-  # alias self.extend include
+  def include: (Module, *Module mods) -> void
+  def self.include: (Module, *Module mods) -> void
+
+  alias extend include
+  alias self.extend self.include
 
   # TODO: Array, Symbol
   # def self.constants: (?bool inherit) -> Array[Symbol]
diff --git a/test/object.rb b/test/object.rb
index 35b467c..7914663 100644
--- a/test/object.rb
+++ b/test/object.rb
@@ -82,6 +82,15 @@ module TestMod end
 
 # @type const A: Class
 class A
+  # @type const TestMod: Module
+  module TestMod end
+
+  include TestMod
+  include TestMod, TestMod, TestMod
+
+  extend TestMod
+  extend TestMod, TestMod, TestMod
+
   public
 
   private
@@ -89,6 +98,12 @@ class A
   protected
 end
 
+Object.include TestMod
+Object.include TestMod, TestMod, TestMod
+
+Object.extend TestMod
+Object.extend TestMod, TestMod, TestMod
+
 sprintf "%d\n", 123
 
 printf "%d\n", 123