diff --git a/README.md b/README.md
index 3e1f82c30..4876e9745 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ Bundler for non-Ruby dependencies from Homebrew, Homebrew Cask, Mac App Store, W
 
 [Visual Studio Code](https://code.visualstudio.com/) is optional and used for installing Visual Studio Code extensions.
 
+[VSCodium](https://vscodium.com/) is optional and used for installing VSCodium extensions.
+
 ## Installation
 
 `brew bundle` is automatically installed when first run.
@@ -69,6 +71,9 @@ whalebrew "whalebrew/wget"
 
 # 'vscode --install-extension'
 vscode "GitHub.codespaces"
+
+# 'codium --install-extension'
+vscodium "GitHub.codespaces"
 ```
 
 ## Versions and lockfiles
@@ -78,7 +83,7 @@ If your software needs specific pinned versions, consider [`whalebrew`](https://
 
 ## New Installers/Checkers/Dumpers
 
-`brew bundle` currently supports Homebrew, Homebrew Cask, Mac App Store, Whalebrew and Visual Studio Code.
+`brew bundle` currently supports Homebrew, Homebrew Cask, Mac App Store, Whalebrew, Visual Studio Code, and VSCodium.
 
 We are interested in contributions for other installers/checkers/dumpers but they must:
 
diff --git a/cmd/bundle.rb b/cmd/bundle.rb
index 23355d9a3..570bdd588 100755
--- a/cmd/bundle.rb
+++ b/cmd/bundle.rb
@@ -95,6 +95,12 @@ class BundleCmd < AbstractCommand
                env:         :bundle_dump_no_vscode,
                description: "`dump` without VSCode extensions. " \
                             "This is enabled by default if `HOMEBREW_BUNDLE_DUMP_NO_VSCODE` is set."
+        switch "--vscodium",
+              description: "`list` or `dump` VSCodium extensions."
+        switch "--no-vscodium",
+              env:         :bundle_dump_no_vscodium,
+              description: "`dump` without VSCodium extensions. " \
+                            "This is enabled by default if `HOMEBREW_BUNDLE_DUMP_NO_VSCODIUM` is set."
         switch "--describe",
                env:         :bundle_dump_describe,
                description: "`dump` adds a description comment above each line, unless the " \
@@ -106,7 +112,9 @@ class BundleCmd < AbstractCommand
                description: "`cleanup` casks using the `zap` command instead of `uninstall`."
 
         conflicts "--all", "--no-vscode"
+        conflicts "--all", "--no-vscodium"
         conflicts "--vscode", "--no-vscode"
+        conflicts "--vscodium", "--no-vscodium"
 
         named_args %w[install dump cleanup check exec list]
       end
@@ -129,7 +137,7 @@ def run
         force = args.force?
         zap = args.zap?
 
-        no_type_args = !args.brews? && !args.casks? && !args.taps? && !args.mas? && !args.whalebrew? && !args.vscode?
+        no_type_args = !args.brews? && !args.casks? && !args.taps? && !args.mas? && !args.whalebrew? && !args.vscode? && !args.vscodium?
 
         case subcommand
         when nil, "install"
diff --git a/lib/bundle.rb b/lib/bundle.rb
index 09797d4ef..e12ba2348 100644
--- a/lib/bundle.rb
+++ b/lib/bundle.rb
@@ -35,3 +35,6 @@
 require "bundle/vscode_extension_checker"
 require "bundle/vscode_extension_dumper"
 require "bundle/vscode_extension_installer"
+require "bundle/vscodium_extension_checker"
+require "bundle/vscodium_extension_dumper"
+require "bundle/vscodium_extension_installer"
diff --git a/lib/bundle/bundle.rb b/lib/bundle/bundle.rb
index ff1af098a..b10670ef5 100644
--- a/lib/bundle/bundle.rb
+++ b/lib/bundle/bundle.rb
@@ -33,6 +33,10 @@ def vscode_installed?
       @vscode_installed ||= which("code").present?
     end
 
+    def vscodium_installed?
+      @vscodium_installed ||= which("codium").present?
+    end
+
     def whalebrew_installed?
       @whalebrew_installed ||= which_formula("whalebrew")
     end
diff --git a/lib/bundle/checker.rb b/lib/bundle/checker.rb
index fb2be58ae..a10873b66 100644
--- a/lib/bundle/checker.rb
+++ b/lib/bundle/checker.rb
@@ -58,12 +58,13 @@ def find_actionable(entries, exit_on_first_error: false, no_upgrade: false, verb
     CheckResult = Struct.new :work_to_be_done, :errors
 
     CHECKS = {
-      taps_to_tap:           "Taps",
-      casks_to_install:      "Casks",
-      extensions_to_install: "VSCode Extensions",
-      apps_to_install:       "Apps",
-      formulae_to_install:   "Formulae",
-      formulae_to_start:     "Services",
+      taps_to_tap:                    "Taps",
+      casks_to_install:               "Casks",
+      extensions_to_install:          "VSCode Extensions",
+      vscodium_extensions_to_install: "VSCodium Extensions",
+      apps_to_install:                "Apps",
+      formulae_to_install:            "Formulae",
+      formulae_to_start:              "Services",
     }.freeze
 
     def check(global: false, file: nil, exit_on_first_error: false, no_upgrade: false, verbose: false)
@@ -122,6 +123,13 @@ def extensions_to_install(exit_on_first_error: false, no_upgrade: false, verbose
       )
     end
 
+    def vscodium_extensions_to_install(exit_on_first_error: false, no_upgrade: false, verbose: false)
+      Bundle::Checker::VscodiumExtensionChecker.new.find_actionable(
+        @dsl.entries,
+        exit_on_first_error:, no_upgrade:, verbose:,
+      )
+    end
+
     def formulae_to_start(exit_on_first_error: false, no_upgrade: false, verbose: false)
       Bundle::Checker::BrewServiceChecker.new.find_actionable(
         @dsl.entries,
diff --git a/lib/bundle/commands/cleanup.rb b/lib/bundle/commands/cleanup.rb
index 132d3cb68..04b47b8dc 100644
--- a/lib/bundle/commands/cleanup.rb
+++ b/lib/bundle/commands/cleanup.rb
@@ -16,6 +16,7 @@ def reset!
         Bundle::BrewDumper.reset!
         Bundle::TapDumper.reset!
         Bundle::VscodeExtensionDumper.reset!
+        Bundle::VscodiumExtensionDumper.reset!
         Bundle::BrewServices.reset!
       end
 
@@ -26,6 +27,7 @@ def run(global: false, file: nil, force: false, zap: false, dsl: nil)
         formulae = formulae_to_uninstall(global:, file:)
         taps = taps_to_untap(global:, file:)
         vscode_extensions = vscode_extensions_to_uninstall(global:, file:)
+        vscodium_extensions = vscodium_extensions_to_uninstall(global:, file:)
         if force
           if casks.any?
             args = zap ? ["--zap"] : []
@@ -44,6 +46,10 @@ def run(global: false, file: nil, force: false, zap: false, dsl: nil)
             vscode_extensions.each do |extension|
               Kernel.system "code", "--uninstall-extension", extension
             end
+
+            vscodium_extensions.each do |extension|
+              Kernel.system "codium", "--uninstall-extension", extension
+            end
           end
 
           cleanup = system_output_no_stderr(HOMEBREW_BREW_FILE, "cleanup")
@@ -75,6 +81,12 @@ def run(global: false, file: nil, force: false, zap: false, dsl: nil)
             would_uninstall = true
           end
 
+          if vscodium_extensions.any?
+            puts "Would uninstall VSCodium extensions:"
+            puts Formatter.columns vscodium_extensions
+            would_uninstall = true
+          end
+
           cleanup = system_output_no_stderr(HOMEBREW_BREW_FILE, "cleanup", "--dry-run")
           unless cleanup.empty?
             puts "Would `brew cleanup`:"
@@ -180,6 +192,19 @@ def vscode_extensions_to_uninstall(global: false, file: nil)
         current_extensions - kept_extensions
       end
 
+      def vscodium_extensions_to_uninstall(global: false, file: nil)
+        @dsl ||= Brewfile.read(global:, file:)
+        kept_extensions = @dsl.entries.select { |e| e.type == :vscodium }.map { |x| x.name.downcase }
+
+        # To provide a graceful migration from `Brewfile`s that don't yet or
+        # don't want to use `vscodium`: don't remove any extensions if we don't
+        # find any in the `Brewfile`.
+        return [].freeze if kept_extensions.empty?
+
+        current_extensions = Bundle::VscodiumExtensionDumper.extensions
+        current_extensions - kept_extensions
+      end
+
       def system_output_no_stderr(cmd, *args)
         IO.popen([cmd, *args], err: :close).read
       end
diff --git a/lib/bundle/commands/dump.rb b/lib/bundle/commands/dump.rb
index 8a8747428..84d8fdbd6 100644
--- a/lib/bundle/commands/dump.rb
+++ b/lib/bundle/commands/dump.rb
@@ -5,9 +5,9 @@ module Commands
     module Dump
       module_function
 
-      def run(global:, file:, describe:, force:, no_restart:, taps:, brews:, casks:, mas:, whalebrew:, vscode:)
+      def run(global:, file:, describe:, force:, no_restart:, taps:, brews:, casks:, mas:, whalebrew:, vscode:, vscodium:)
         Bundle::Dumper.dump_brewfile(
-          global:, file:, describe:, force:, no_restart:, taps:, brews:, casks:, mas:, whalebrew:, vscode:,
+          global:, file:, describe:, force:, no_restart:, taps:, brews:, casks:, mas:, whalebrew:, vscode:, vscodium:,
         )
       end
     end
diff --git a/lib/bundle/commands/list.rb b/lib/bundle/commands/list.rb
index b4568ed46..ad04508a4 100644
--- a/lib/bundle/commands/list.rb
+++ b/lib/bundle/commands/list.rb
@@ -5,11 +5,11 @@ module Commands
     module List
       module_function
 
-      def run(global:, file:, brews:, casks:, taps:, mas:, whalebrew:, vscode:)
+      def run(global:, file:, brews:, casks:, taps:, mas:, whalebrew:, vscode:, vscodium:)
         parsed_entries = Brewfile.read(global:, file:).entries
         Bundle::Lister.list(
           parsed_entries,
-          brews:, casks:, taps:, mas:, whalebrew:, vscode:,
+          brews:, casks:, taps:, mas:, whalebrew:, vscode:, vscodium:,
         )
       end
     end
diff --git a/lib/bundle/dsl.rb b/lib/bundle/dsl.rb
index 7d1007a37..ae0f48e18 100644
--- a/lib/bundle/dsl.rb
+++ b/lib/bundle/dsl.rb
@@ -81,6 +81,12 @@ def vscode(name)
       @entries << Entry.new(:vscode, name)
     end
 
+    def vscodium(name)
+      raise "name(#{name.inspect}) should be a String object" unless name.is_a? String
+
+      @entries << Entry.new(:vscodium, name)
+    end
+
     def tap(name, clone_target = nil, options = {})
       raise "name(#{name.inspect}) should be a String object" unless name.is_a? String
       if clone_target && !clone_target.is_a?(String)
diff --git a/lib/bundle/dumper.rb b/lib/bundle/dumper.rb
index dd3ba6694..b002e0471 100644
--- a/lib/bundle/dumper.rb
+++ b/lib/bundle/dumper.rb
@@ -13,7 +13,7 @@ def can_write_to_brewfile?(brewfile_path, force: false)
       true
     end
 
-    def build_brewfile(describe:, no_restart:, brews:, taps:, casks:, mas:, whalebrew:, vscode:)
+    def build_brewfile(describe:, no_restart:, brews:, taps:, casks:, mas:, whalebrew:, vscode:, vscodium:)
       content = []
       content << TapDumper.dump if taps
       content << BrewDumper.dump(describe:, no_restart:) if brews
@@ -21,14 +21,15 @@ def build_brewfile(describe:, no_restart:, brews:, taps:, casks:, mas:, whalebre
       content << MacAppStoreDumper.dump if mas
       content << WhalebrewDumper.dump if whalebrew
       content << VscodeExtensionDumper.dump if vscode
+      content << VscodiumExtensionDumper.dump if vscodium
       "#{content.reject(&:empty?).join("\n")}\n"
     end
 
     def dump_brewfile(global:, file:, describe:, force:, no_restart:, brews:, taps:, casks:, mas:, whalebrew:,
-                      vscode:)
+                      vscode:, vscodium:)
       path = brewfile_path(global:, file:)
       can_write_to_brewfile?(path, force:)
-      content = build_brewfile(describe:, no_restart:, taps:, brews:, casks:, mas:, whalebrew:, vscode:)
+      content = build_brewfile(describe:, no_restart:, taps:, brews:, casks:, mas:, whalebrew:, vscode:, vscodium:)
       write_file path, content
     end
 
diff --git a/lib/bundle/installer.rb b/lib/bundle/installer.rb
index 31015439f..a20d69086 100644
--- a/lib/bundle/installer.rb
+++ b/lib/bundle/installer.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: true
+1# frozen_string_literal: true
 
 module Bundle
   module Installer
@@ -31,6 +31,8 @@ def install(entries, global: false, file: nil, no_lock: false, no_upgrade: false
           Bundle::WhalebrewInstaller
         when :vscode
           Bundle::VscodeExtensionInstaller
+        when :vscodium
+          Bundle::VscodiumExtensionInstaller
         when :tap
           verb = "Tapping"
           options = entry.options
diff --git a/lib/bundle/lister.rb b/lib/bundle/lister.rb
index 4d9693ccf..599cff545 100644
--- a/lib/bundle/lister.rb
+++ b/lib/bundle/lister.rb
@@ -4,19 +4,20 @@ module Bundle
   module Lister
     module_function
 
-    def list(entries, brews:, casks:, taps:, mas:, whalebrew:, vscode:)
+    def list(entries, brews:, casks:, taps:, mas:, whalebrew:, vscode:, vscodium:)
       entries.each do |entry|
-        puts entry.name if show?(entry.type, brews:, casks:, taps:, mas:, whalebrew:, vscode:)
+        puts entry.name if show?(entry.type, brews:, casks:, taps:, mas:, whalebrew:, vscode:, vscodium:)
       end
     end
 
-    def self.show?(type, brews:, casks:, taps:, mas:, whalebrew:, vscode:)
+    def self.show?(type, brews:, casks:, taps:, mas:, whalebrew:, vscode:, vscodium:)
       return true if brews && type == :brew
       return true if casks && type == :cask
       return true if taps && type == :tap
       return true if mas && type == :mas
       return true if whalebrew && type == :whalebrew
       return true if vscode && type == :vscode
+      return true if vscodium && type == :vscodium
 
       false
     end
diff --git a/lib/bundle/vscodium_extension_checker.rb b/lib/bundle/vscodium_extension_checker.rb
new file mode 100644
index 000000000..7d44c4595
--- /dev/null
+++ b/lib/bundle/vscodium_extension_checker.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module Bundle
+  module Checker
+    class VscodiumExtensionChecker < Bundle::Checker::Base
+      PACKAGE_TYPE = :vscodium
+      PACKAGE_TYPE_NAME = "VSCodium Extension"
+
+      def failure_reason(extension, no_upgrade:)
+        "#{PACKAGE_TYPE_NAME} #{extension} needs to be installed."
+      end
+
+      def installed_and_up_to_date?(extension, no_upgrade: false)
+        Bundle::VscodiumExtensionInstaller.extension_installed?(extension)
+      end
+    end
+  end
+end
diff --git a/lib/bundle/vscodium_extension_dumper.rb b/lib/bundle/vscodium_extension_dumper.rb
new file mode 100644
index 000000000..4fa1a2527
--- /dev/null
+++ b/lib/bundle/vscodium_extension_dumper.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module Bundle
+  module VscodiumExtensionDumper
+    module_function
+
+    def reset!
+      @extensions = nil
+    end
+
+    def extensions
+      @extensions ||= if Bundle.vscodium_installed?
+        Bundle.exchange_uid_if_needed! do
+          `codium --list-extensions 2>/dev/null`
+        end.split("\n").map(&:downcase)
+      else
+        []
+      end
+    end
+
+    def dump
+      extensions.map { |name| "vscodium \"#{name}\"" }.join("\n")
+    end
+  end
+end
diff --git a/lib/bundle/vscodium_extension_installer.rb b/lib/bundle/vscodium_extension_installer.rb
new file mode 100644
index 000000000..720682dd5
--- /dev/null
+++ b/lib/bundle/vscodium_extension_installer.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+module Bundle
+  module VscodiumExtensionInstaller
+    module_function
+
+    def reset!
+      @installed_extensions = nil
+    end
+
+    def preinstall(name, no_upgrade: false, verbose: false)
+      if !Bundle.vscodium_installed? && Bundle.cask_installed?
+        puts "Installing vscodium. It is not currently installed." if verbose
+        Bundle.system HOMEBREW_BREW_FILE, "install", "--cask", "vscodium", verbose:
+      end
+
+      if extension_installed?(name)
+        puts "Skipping install of #{name} VSCodium extension. It is already installed." if verbose
+        return false
+      end
+
+      raise "Unable to install #{name} VSCodium extension. VSCodium is not installed." unless Bundle.vscodium_installed?
+
+      true
+    end
+
+    def install(name, preinstall: true, no_upgrade: false, verbose: false, force: false)
+      return true unless preinstall
+      return true if extension_installed?(name)
+
+      puts "Installing #{name} VSCodium extension. It is not currently installed." if verbose
+
+      return false unless Bundle.exchange_uid_if_needed! do
+        Bundle.system("codium", "--install-extension", name, verbose:)
+      end
+
+      installed_extensions << name
+
+      true
+    end
+
+    def extension_installed?(name)
+      installed_extensions.include? name.downcase
+    end
+
+    def installed_extensions
+      @installed_extensions ||= Bundle::VscodiumExtensionDumper.extensions
+    end
+  end
+end
diff --git a/spec/bundle/commands/check_command_spec.rb b/spec/bundle/commands/check_command_spec.rb
index 121041534..e100f9833 100644
--- a/spec/bundle/commands/check_command_spec.rb
+++ b/spec/bundle/commands/check_command_spec.rb
@@ -261,6 +261,14 @@
         receive(:exit_early_check).once.and_call_original
       expect { do_check }.to raise_error(SystemExit)
     end
+
+    it "stops checking after the first VSCodium extension" do
+      allow_any_instance_of(Pathname).to receive(:read).and_return("vscodium 'abc'\nvscodium 'def'")
+
+      expect_any_instance_of(Bundle::Checker::VscodiumExtensionChecker).to \
+        receive(:exit_early_check).once.and_call_original
+      expect { do_check }.to raise_error(SystemExit)
+    end
   end
 
   context "when a new checker fails to implement installed_and_up_to_date" do
diff --git a/spec/bundle/commands/cleanup_command_spec.rb b/spec/bundle/commands/cleanup_command_spec.rb
index 8cac2e535..1625eb7cb 100644
--- a/spec/bundle/commands/cleanup_command_spec.rb
+++ b/spec/bundle/commands/cleanup_command_spec.rb
@@ -22,6 +22,7 @@
         brew 'hasbuilddependency2'
         mas 'appstoreapp1', id: 1
         vscode 'VsCodeExtension1'
+        vscodium 'VsCodiumExtension1'
       EOS
     end
 
@@ -87,15 +88,26 @@
       allow(Bundle::VscodeExtensionDumper).to receive(:extensions).and_return(%w[z vscodeextension1])
       expect(described_class.vscode_extensions_to_uninstall).to eql(%w[z])
     end
+
+    it "computes which VSCodium extensions to uninstall" do
+      allow(Bundle::VscodiumExtensionDumper).to receive(:extensions).and_return(%w[z])
+      expect(described_class.vscodium_extensions_to_uninstall).to eql(%w[z])
+    end
+
+    it "computes which VSCodium extensions to uninstall irrespective of case of the extension name" do
+      allow(Bundle::VscodiumExtensionDumper).to receive(:extensions).and_return(%w[z vscodiumextension1])
+      expect(described_class.vscodium_extensions_to_uninstall).to eql(%w[z])
+    end
   end
 
   context "when there are no formulae to uninstall and no taps to untap" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             [],
-                                                 formulae_to_uninstall:          [],
-                                                 taps_to_untap:                  [],
-                                                 vscode_extensions_to_uninstall: [])
+      allow(described_class).to receive_messages(casks_to_uninstall:               [],
+                                                 formulae_to_uninstall:            [],
+                                                 taps_to_untap:                    [],
+                                                 vscode_extensions_to_uninstall:   [],
+                                                 vscodium_extensions_to_uninstall: [])
     end
 
     it "does nothing" do
@@ -108,10 +120,11 @@
   context "when there are casks to uninstall" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             %w[a b],
-                                                 formulae_to_uninstall:          [],
-                                                 taps_to_untap:                  [],
-                                                 vscode_extensions_to_uninstall: [])
+      allow(described_class).to receive_messages(casks_to_uninstall:               %w[a b],
+                                                 formulae_to_uninstall:            [],
+                                                 taps_to_untap:                    [],
+                                                 vscode_extensions_to_uninstall:   [],
+                                                 vscodium_extensions_to_uninstall: [])
     end
 
     it "uninstalls casks" do
@@ -124,10 +137,11 @@
   context "when there are casks to zap" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             %w[a b],
-                                                 formulae_to_uninstall:          [],
-                                                 taps_to_untap:                  [],
-                                                 vscode_extensions_to_uninstall: [])
+      allow(described_class).to receive_messages(casks_to_uninstall:               %w[a b],
+                                                 formulae_to_uninstall:            [],
+                                                 taps_to_untap:                    [],
+                                                 vscode_extensions_to_uninstall:   [],
+                                                 vscodium_extensions_to_uninstall: [])
     end
 
     it "uninstalls casks" do
@@ -140,10 +154,11 @@
   context "when there are formulae to uninstall" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             [],
-                                                 formulae_to_uninstall:          %w[a b],
-                                                 taps_to_untap:                  [],
-                                                 vscode_extensions_to_uninstall: [])
+      allow(described_class).to receive_messages(casks_to_uninstall:               [],
+                                                 formulae_to_uninstall:            %w[a b],
+                                                 taps_to_untap:                    [],
+                                                 vscode_extensions_to_uninstall:   [],
+                                                 vscodium_extensions_to_uninstall: [])
     end
 
     it "uninstalls formulae" do
@@ -156,10 +171,11 @@
   context "when there are taps to untap" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             [],
-                                                 formulae_to_uninstall:          [],
-                                                 taps_to_untap:                  %w[a b],
-                                                 vscode_extensions_to_uninstall: [])
+      allow(described_class).to receive_messages(casks_to_uninstall:               [],
+                                                 formulae_to_uninstall:            [],
+                                                 taps_to_untap:                    %w[a b],
+                                                 vscode_extensions_to_uninstall:   [],
+                                                 vscodium_extensions_to_uninstall: [])
     end
 
     it "untaps taps" do
@@ -172,10 +188,11 @@
   context "when there are VSCode extensions to uninstall" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             [],
-                                                 formulae_to_uninstall:          [],
-                                                 taps_to_untap:                  [],
-                                                 vscode_extensions_to_uninstall: %w[GitHub.codespaces])
+      allow(described_class).to receive_messages(casks_to_uninstall:               [],
+                                                 formulae_to_uninstall:            [],
+                                                 taps_to_untap:                    [],
+                                                 vscode_extensions_to_uninstall:   %w[GitHub.codespaces],
+                                                 vscodium_extensions_to_uninstall: [])
     end
 
     it "uninstalls extensions" do
@@ -185,33 +202,52 @@
     end
   end
 
+  context "when there are VSCodium extensions to uninstall" do
+    before do
+      described_class.reset!
+      allow(described_class).to receive_messages(casks_to_uninstall:               [],
+                                                 formulae_to_uninstall:            [],
+                                                 taps_to_untap:                    [],
+                                                 vscode_extensions_to_uninstall:   [],
+                                                 vscodium_extensions_to_uninstall: %w[GitHub.codespaces])
+    end
+
+    it "uninstalls extensions" do
+      expect(Kernel).to receive(:system).with("codium", "--uninstall-extension", "GitHub.codespaces")
+      expect(described_class).to receive(:system_output_no_stderr).and_return("")
+      described_class.run(force: true)
+    end
+  end
+
   context "when there are casks and formulae to uninstall and taps to untap but without passing `--force`" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             %w[a b],
-                                                 formulae_to_uninstall:          %w[a b],
-                                                 taps_to_untap:                  %w[a b],
-                                                 vscode_extensions_to_uninstall: %w[a b])
+      allow(described_class).to receive_messages(casks_to_uninstall:               %w[a b],
+                                                 formulae_to_uninstall:            %w[a b],
+                                                 taps_to_untap:                    %w[a b],
+                                                 vscode_extensions_to_uninstall:   %w[a b],
+                                                 vscodium_extensions_to_uninstall: %w[a b])
     end
 
     it "lists casks, formulae and taps" do
-      expect(Formatter).to receive(:columns).with(%w[a b]).exactly(4).times
+      expect(Formatter).to receive(:columns).with(%w[a b]).exactly(5).times
       expect(Kernel).not_to receive(:system)
       expect(described_class).to receive(:system_output_no_stderr).and_return("")
       expect do
         described_class.run
       end.to raise_error(SystemExit)
-        .and output(/Would uninstall formulae:.*Would untap:.*Would uninstall VSCode extensions:/m).to_stdout
+        .and output(/Would uninstall formulae:.*Would untap:.*Would uninstall VSCode extensions:.*Would uninstall VSCodium extensions:/m).to_stdout
     end
   end
 
   context "when there is brew cleanup output" do
     before do
       described_class.reset!
-      allow(described_class).to receive_messages(casks_to_uninstall:             [],
-                                                 formulae_to_uninstall:          [],
-                                                 taps_to_untap:                  [],
-                                                 vscode_extensions_to_uninstall: [])
+      allow(described_class).to receive_messages(casks_to_uninstall:               [],
+                                                 formulae_to_uninstall:            [],
+                                                 taps_to_untap:                    [],
+                                                 vscode_extensions_to_uninstall:   [],
+                                                 vscodium_extensions_to_uninstall: [])
     end
 
     def sane?
diff --git a/spec/bundle/commands/dump_command_spec.rb b/spec/bundle/commands/dump_command_spec.rb
index 90a755466..9013f6081 100644
--- a/spec/bundle/commands/dump_command_spec.rb
+++ b/spec/bundle/commands/dump_command_spec.rb
@@ -5,7 +5,7 @@
 describe Bundle::Commands::Dump do
   subject(:dump) do
     described_class.run(global:, file: nil, describe: false, force:, no_restart: false, taps: true, brews: true,
-                        casks: true, mas: true, whalebrew: true, vscode: true)
+                        casks: true, mas: true, whalebrew: true, vscode: true, vscodium: true)
   end
 
   let(:force) { false }
diff --git a/spec/bundle/commands/install_command_spec.rb b/spec/bundle/commands/install_command_spec.rb
index 70970a770..43314e392 100644
--- a/spec/bundle/commands/install_command_spec.rb
+++ b/spec/bundle/commands/install_command_spec.rb
@@ -23,6 +23,7 @@
         mas '1Password', id: 443987910
         whalebrew 'whalebrew/wget'
         vscode 'GitHub.codespaces'
+        vscodium 'GitHub.codespaces'
       EOS
     end
 
@@ -30,6 +31,7 @@
       allow(Bundle::TapInstaller).to receive(:preinstall).and_return(false)
       allow(Bundle::WhalebrewInstaller).to receive(:preinstall).and_return(false)
       allow(Bundle::VscodeExtensionInstaller).to receive(:preinstall).and_return(false)
+      allow(Bundle::VscodiumExtensionInstaller).to receive(:preinstall).and_return(false)
       allow(Bundle::BrewInstaller).to receive_messages(preinstall: true, install: true)
       allow(Bundle::CaskInstaller).to receive_messages(preinstall: true, install: true)
       allow(Bundle::MacAppStoreInstaller).to receive_messages(preinstall: true, install: true)
@@ -41,6 +43,7 @@
       allow(Bundle::TapInstaller).to receive(:preinstall).and_return(false)
       allow(Bundle::WhalebrewInstaller).to receive(:preinstall).and_return(false)
       allow(Bundle::VscodeExtensionInstaller).to receive(:preinstall).and_return(false)
+      allow(Bundle::VscodiumExtensionInstaller).to receive(:preinstall).and_return(false)
       allow(Bundle::BrewInstaller).to receive_messages(preinstall: true, install: true)
       allow(Bundle::CaskInstaller).to receive_messages(preinstall: true, install: true)
       allow(Bundle::MacAppStoreInstaller).to receive_messages(preinstall: true, install: true)
@@ -65,6 +68,7 @@
       allow(Bundle::TapInstaller).to receive_messages(preinstall: true, install: false)
       allow(Bundle::WhalebrewInstaller).to receive_messages(preinstall: true, install: false)
       allow(Bundle::VscodeExtensionInstaller).to receive_messages(preinstall: true, install: false)
+      allow(Bundle::VscodiumExtensionInstaller).to receive_messages(preinstall: true, install: false)
       allow_any_instance_of(Pathname).to receive(:read).and_return(brewfile_contents)
 
       expect { described_class.run }.to raise_error(SystemExit)
@@ -77,6 +81,7 @@
       allow(Bundle::MacAppStoreInstaller).to receive_messages(preinstall: true, install: true)
       allow(Bundle::WhalebrewInstaller).to receive_messages(preinstall: true, install: true)
       allow(Bundle::VscodeExtensionInstaller).to receive_messages(preinstall: true, install: true)
+      allow(Bundle::VscodiumExtensionInstaller).to receive_messages(preinstall: true, install: true)
       allow_any_instance_of(Pathname).to receive(:read).and_return(brewfile_contents)
 
       expect(Bundle).not_to receive(:system)
diff --git a/spec/bundle/commands/list_command_spec.rb b/spec/bundle/commands/list_command_spec.rb
index 131f91d99..035e93364 100644
--- a/spec/bundle/commands/list_command_spec.rb
+++ b/spec/bundle/commands/list_command_spec.rb
@@ -3,7 +3,7 @@
 require "spec_helper"
 
 describe Bundle::Commands::List do
-  subject(:list) { described_class.run(global: false, file: nil, brews:, casks:, taps:, mas:, whalebrew:, vscode:) }
+  subject(:list) { described_class.run(global: false, file: nil, brews:, casks:, taps:, mas:, whalebrew:, vscode:, vscodium:) }
 
   let(:brews) { true }
   let(:casks) { false }
@@ -11,6 +11,7 @@
   let(:mas) { false }
   let(:whalebrew) { false }
   let(:vscode) { false }
+  let(:vscodium) { false }
 
   before do
     allow_any_instance_of(IO).to receive(:puts)
@@ -26,6 +27,7 @@
           mas '1Password', id: 443987910
           whalebrew 'whalebrew/imagemagick'
           vscode 'shopify.ruby-lsp'
+          vscodium 'shopify.ruby-lsp'
         EOS
       )
     end
@@ -42,6 +44,7 @@
         mas:       "1Password",
         whalebrew: "whalebrew/imagemagick",
         vscode:    "shopify.ruby-lsp",
+        vscodium:  "shopify.ruby-lsp",
       }
 
       combinations = 1.upto(types_and_deps.length).flat_map do |i|
@@ -61,6 +64,7 @@
           let(:mas) { args_hash[:mas] }
           let(:whalebrew) { args_hash[:whalebrew] }
           let(:vscode) { args_hash[:vscode] }
+          let(:vscodium) { args_hash[:vscodium] }
 
           it "shows only #{words}" do
             expected = options_list.map { |opt| types_and_deps[opt] }.join("\n")
diff --git a/spec/bundle/dsl_spec.rb b/spec/bundle/dsl_spec.rb
index 34708a327..d0bca1e66 100644
--- a/spec/bundle/dsl_spec.rb
+++ b/spec/bundle/dsl_spec.rb
@@ -24,6 +24,7 @@ def dsl_from_string(string)
         mas '1Password', id: 443987910
         whalebrew 'whalebrew/wget'
         vscode 'GitHub.codespaces'
+        vscodium 'GitHub.codespaces'
       EOS
     end
 
diff --git a/spec/bundle/dumper_spec.rb b/spec/bundle/dumper_spec.rb
index fa54f5c86..2733b33d0 100644
--- a/spec/bundle/dumper_spec.rb
+++ b/spec/bundle/dumper_spec.rb
@@ -10,13 +10,14 @@
     ENV["HOMEBREW_BUNDLE_FILE"] = ""
 
     allow(Bundle).to receive_messages(cask_installed?: true, mas_installed?: false, whalebrew_installed?: false,
-                                      vscode_installed?: false)
+                                      vscode_installed?: false, vscodium_installed?: false)
     Bundle::BrewDumper.reset!
     Bundle::TapDumper.reset!
     Bundle::CaskDumper.reset!
     Bundle::MacAppStoreDumper.reset!
     Bundle::WhalebrewDumper.reset!
     Bundle::VscodeExtensionDumper.reset!
+    Bundle::VscodiumExtensionDumper.reset!
     Bundle::BrewServices.reset!
 
     chrome     = instance_double(Cask::Cask,
@@ -38,7 +39,7 @@
   it "generates output" do
     expect(dumper.build_brewfile(
              describe: false, no_restart: false, brews: true, taps: true, casks: true, mas: true,
-             whalebrew: true, vscode: true
+             whalebrew: true, vscode: true, vscodium: true
            )).to eql("cask \"google-chrome\"\ncask \"java\"\ncask \"iterm2-beta\"\n")
   end