From 3fbfa17f71ba04a4745c9cb9032bcfe5baabc62f Mon Sep 17 00:00:00 2001
From: Peter Boling <peter.boling@gmail.com>
Date: Sun, 23 Feb 2025 04:25:55 +0700
Subject: [PATCH] =?UTF-8?q?=E2=9E=95=20gem=20"appraisal",=20github:=20"pbo?=
 =?UTF-8?q?ling/appraisal",=20branch:=20"galtzo"?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- https://github.com/thoughtbot/appraisal/pull/250
- https://github.com/thoughtbot/appraisal/pull/248
---
 .github/workflows/ancient.yml          |  38 +++++---
 .github/workflows/coverage.yml         |   8 +-
 .github/workflows/current.yml          |  86 +++++++++++++++++
 .github/workflows/heads.yml            |  36 +++----
 .github/workflows/hoary.yml            |  62 ++++++++++++
 .github/workflows/jruby.yml            |  91 ++++++++++++++++++
 .github/workflows/legacy.yml           |  12 +--
 .github/workflows/style.yml            |   2 +-
 .github/workflows/supported.yml        |  30 +++---
 .github/workflows/truffle.yml          |  83 ++++++++++++++++
 .github/workflows/unsupported.yml      |  22 +++--
 .gitignore                             |   4 +
 .rspec                                 |   1 +
 .rubocop_gradual.lock                  |  27 ++++++
 .tool-versions                         |   2 +-
 .yardopts                              |   1 +
 Appraisal.root.gemfile                 |  14 +++
 Appraisals                             | 101 +++++++++++++++++++
 CONTRIBUTING.md                        |  47 ++++++---
 Gemfile                                |  49 ++++++++--
 Gemfile.lock                           |  91 ++++++++++++------
 LICENSE.txt                            |   2 +-
 README.md                              |   6 +-
 Rakefile                               |  12 +--
 gem_checksums.gemspec                  |  35 +++----
 gemfiles/audit.gemfile                 |  10 ++
 gemfiles/audit.gemfile.lock            |  54 +++++++++++
 gemfiles/coverage.gemfile              |  10 ++
 gemfiles/coverage.gemfile.lock         |  77 +++++++++++++++
 gemfiles/jruby_head.gemfile            |   8 ++
 gemfiles/jruby_head.gemfile.lock       |  43 +++++++++
 gemfiles/modular/audit.gemfile         |   5 +
 gemfiles/modular/coverage.gemfile      |   6 ++
 gemfiles/modular/documentation.gemfile |  10 ++
 gemfiles/modular/style.gemfile         |  12 +++
 gemfiles/ruby_2_2.gemfile              |   5 +
 gemfiles/ruby_2_2.gemfile.lock         |  39 ++++++++
 gemfiles/ruby_2_3.gemfile              |   5 +
 gemfiles/ruby_2_3.gemfile.lock         |  39 ++++++++
 gemfiles/ruby_2_4.gemfile              |   5 +
 gemfiles/ruby_2_4.gemfile.lock         |  39 ++++++++
 gemfiles/ruby_2_5.gemfile              |   5 +
 gemfiles/ruby_2_5.gemfile.lock         |  39 ++++++++
 gemfiles/ruby_2_6.gemfile              |   8 ++
 gemfiles/ruby_2_6.gemfile.lock         |  43 +++++++++
 gemfiles/ruby_2_7.gemfile              |   8 ++
 gemfiles/ruby_2_7.gemfile.lock         |  43 +++++++++
 gemfiles/ruby_3_0.gemfile              |   8 ++
 gemfiles/ruby_3_0.gemfile.lock         |  43 +++++++++
 gemfiles/ruby_3_1.gemfile              |   8 ++
 gemfiles/ruby_3_1.gemfile.lock         |  43 +++++++++
 gemfiles/ruby_3_2.gemfile              |   8 ++
 gemfiles/ruby_3_2.gemfile.lock         |  43 +++++++++
 gemfiles/ruby_3_3.gemfile              |   8 ++
 gemfiles/ruby_3_3.gemfile.lock         |  43 +++++++++
 gemfiles/ruby_current.gemfile          |   8 ++
 gemfiles/ruby_head.gemfile             |   8 ++
 gemfiles/ruby_head.gemfile.lock        |  43 +++++++++
 gemfiles/style.gemfile                 |  10 ++
 gemfiles/style.gemfile.lock            | 128 +++++++++++++++++++++++++
 gemfiles/truffleruby_head.gemfile      |   8 ++
 gemfiles/truffleruby_head.gemfile.lock |  43 +++++++++
 62 files changed, 1672 insertions(+), 155 deletions(-)
 create mode 100644 .github/workflows/current.yml
 create mode 100644 .github/workflows/hoary.yml
 create mode 100644 .github/workflows/jruby.yml
 create mode 100644 .github/workflows/truffle.yml
 create mode 100644 .rubocop_gradual.lock
 create mode 100644 .yardopts
 create mode 100644 Appraisal.root.gemfile
 create mode 100644 Appraisals
 create mode 100644 gemfiles/audit.gemfile
 create mode 100644 gemfiles/audit.gemfile.lock
 create mode 100644 gemfiles/coverage.gemfile
 create mode 100644 gemfiles/coverage.gemfile.lock
 create mode 100644 gemfiles/jruby_head.gemfile
 create mode 100644 gemfiles/jruby_head.gemfile.lock
 create mode 100644 gemfiles/modular/audit.gemfile
 create mode 100644 gemfiles/modular/coverage.gemfile
 create mode 100644 gemfiles/modular/documentation.gemfile
 create mode 100644 gemfiles/modular/style.gemfile
 create mode 100644 gemfiles/ruby_2_2.gemfile
 create mode 100644 gemfiles/ruby_2_2.gemfile.lock
 create mode 100644 gemfiles/ruby_2_3.gemfile
 create mode 100644 gemfiles/ruby_2_3.gemfile.lock
 create mode 100644 gemfiles/ruby_2_4.gemfile
 create mode 100644 gemfiles/ruby_2_4.gemfile.lock
 create mode 100644 gemfiles/ruby_2_5.gemfile
 create mode 100644 gemfiles/ruby_2_5.gemfile.lock
 create mode 100644 gemfiles/ruby_2_6.gemfile
 create mode 100644 gemfiles/ruby_2_6.gemfile.lock
 create mode 100644 gemfiles/ruby_2_7.gemfile
 create mode 100644 gemfiles/ruby_2_7.gemfile.lock
 create mode 100644 gemfiles/ruby_3_0.gemfile
 create mode 100644 gemfiles/ruby_3_0.gemfile.lock
 create mode 100644 gemfiles/ruby_3_1.gemfile
 create mode 100644 gemfiles/ruby_3_1.gemfile.lock
 create mode 100644 gemfiles/ruby_3_2.gemfile
 create mode 100644 gemfiles/ruby_3_2.gemfile.lock
 create mode 100644 gemfiles/ruby_3_3.gemfile
 create mode 100644 gemfiles/ruby_3_3.gemfile.lock
 create mode 100644 gemfiles/ruby_current.gemfile
 create mode 100644 gemfiles/ruby_head.gemfile
 create mode 100644 gemfiles/ruby_head.gemfile.lock
 create mode 100644 gemfiles/style.gemfile
 create mode 100644 gemfiles/style.gemfile.lock
 create mode 100644 gemfiles/truffleruby_head.gemfile
 create mode 100644 gemfiles/truffleruby_head.gemfile.lock

diff --git a/.github/workflows/ancient.yml b/.github/workflows/ancient.yml
index 376032a..6228777 100644
--- a/.github/workflows/ancient.yml
+++ b/.github/workflows/ancient.yml
@@ -1,7 +1,4 @@
-name: Unsupported Compat (EOL, Ruby 2.7) Matrix
-
-env:
-  K_SOUP_COV_DO: false
+name: MRI 2.3, 2.4, 2.5 (EOL)
 
 on:
   push:
@@ -15,9 +12,6 @@ on:
   # Allow manually triggering the workflow.
   workflow_dispatch:
 
-permissions:
-  contents: read
-
 # Cancels all previous workflow runs for the same branch that have not yet completed.
 concurrency:
   # The concurrency group contains the workflow name and the branch name.
@@ -26,7 +20,7 @@ concurrency:
 
 jobs:
   test:
-    name: Specs - Ruby ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
     if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-22.04
     continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
@@ -36,13 +30,29 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          # Ruby 2.3
+          - ruby: "2.3"
+            appraisal: "ruby-2-3"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: "3.3.27"
+            bundler: "2.3.27"
+
+          # Ruby 2.4
+          - ruby: "2.4"
+            appraisal: "ruby-2-4"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: "3.3.27"
+            bundler: "2.3.27"
+
           # Ruby 2.5
           - ruby: "2.5"
             appraisal: "ruby-2-5"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
-            rubygems: '3.3.27'
-            bundler: '2.3.27'
+            rubygems: "3.3.27"
+            bundler: "2.3.27"
 
     steps:
       - name: Checkout
@@ -59,9 +69,9 @@ jobs:
       # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
       # We need to do this first to get appraisal installed.
       # NOTE: This does not use the main Gemfile at all.
-      - name: Bundle install for Appraisal ${{ matrix.appraisal }}
+      - name: Install Root Appraisal
         run: bundle
-      - name: Install Appraisal ${{ matrix.appraisal }} dependencies
+      - name: Appraisal for ${{ matrix.appraisal }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle
-      - name: Run ${{ matrix.appraisal }} tests via ${{ matrix.exec_cmd }}
+      - name: Tests for ${{ matrix.ruby }} via ${{ matrix.exec_cmd }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 9fcab2d..e378337 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -1,8 +1,8 @@
 name: Test Coverage
 
 env:
-  K_SOUP_COV_MIN_BRANCH: 80
-  K_SOUP_COV_MIN_LINE: 91
+  K_SOUP_COV_MIN_BRANCH: 100
+  K_SOUP_COV_MIN_LINE: 100
   K_SOUP_COV_MIN_HARD: true
   K_SOUP_COV_DO: true
   K_SOUP_COV_COMMAND_NAME: "RSpec Coverage"
@@ -30,7 +30,7 @@ concurrency:
 
 jobs:
   test:
-    name: Specs with Coverage - Ruby ${{ matrix.ruby }} ${{ matrix.name_extra || '' }}
+    name: Specs with Coverage ${{ matrix.ruby }} ${{ matrix.name_extra || '' }}
     if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
@@ -43,7 +43,7 @@ jobs:
           # Coverage
           - ruby: "3.4"
             appraisal: "coverage"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
             rubygems: latest
             bundler: latest
diff --git a/.github/workflows/current.yml b/.github/workflows/current.yml
new file mode 100644
index 0000000..44816b5
--- /dev/null
+++ b/.github/workflows/current.yml
@@ -0,0 +1,86 @@
+# Targets the evergreen latest release of ruby, truffleruby, and jruby
+name: Current
+
+env:
+  K_SOUP_COV_DO: false
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '!*' # Do not execute on tags
+  pull_request:
+    branches:
+      - '*'
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Specs ${{ matrix.ruby }}@${{ matrix.name_extra || '' }}
+    if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
+    env: # $BUNDLE_GEMFILE must be set at job level, so it is set for all steps
+      BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}.gemfile
+    strategy:
+      matrix:
+        include:
+          # Ruby 3.4
+          - ruby: "ruby"
+            appraisal: "ruby-current"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: latest
+            bundler: latest
+            name_extra: "ruby-3.4" # NOTE: This will become out of date!
+
+          # truffleruby-24.1 (targets Ruby 3.3.5 compatibility)
+          - ruby: "truffleruby"
+            appraisal: "ruby-current"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+            name_extra: "truffleruby-24.1" # NOTE: This will become out of date!
+
+          # jruby-9.4 (targets Ruby 3.1 compatibility)
+          - ruby: "jruby"
+            appraisal: "ruby-current"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+            name_extra: "jruby-9.4" # NOTE: This will become out of date!
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby & RubyGems
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          rubygems: ${{ matrix.rubygems }}
+          bundler: ${{ matrix.bundler }}
+          bundler-cache: false
+
+      # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
+      # We need to do this first to get appraisal installed.
+      # NOTE: This does not use the main Gemfile at all.
+      - name: Install Root Appraisal
+        run: bundle
+      - name: Appraisal for ${{ matrix.appraisal }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle
+      - name: Tests for ${{ matrix.ruby }}@${{ matrix.name_extra }} via ${{ matrix.exec_cmd }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/heads.yml b/.github/workflows/heads.yml
index 1634c7e..b6ad499 100644
--- a/.github/workflows/heads.yml
+++ b/.github/workflows/heads.yml
@@ -1,4 +1,4 @@
-name: Heads Compat Matrix
+name: Heads
 
 env:
   K_SOUP_COV_DO: false
@@ -26,7 +26,7 @@ concurrency:
 
 jobs:
   test:
-    name: Specs - Ruby ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
     if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
@@ -36,30 +36,30 @@ jobs:
       fail-fast: true
       matrix:
         include:
+          # NOTE: Heads use default rubygems / bundler; their defaults are custom, unreleased, and from the future!
           # ruby-head
           - ruby: "ruby-head"
             appraisal: "ruby-head"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
-            rubygems: latest
-            bundler: latest
+            rubygems: default
+            bundler: default
 
           # truffleruby-head
           - ruby: "truffleruby-head"
             appraisal: "truffleruby-head"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
-            rubygems: latest
-            bundler: latest
+            rubygems: default
+            bundler: default
 
           # jruby-head
-          # Error output has a significantly different format in JRuby :(
-          #  - ruby: "jruby-head"
-          #    appraisal: "jruby-head"
-          #    exec_cmd: "rake test"
-          #    gemfile: "Appraisal.root"
-          #    rubygems: latest
-          #    bundler: latest
+          - ruby: "jruby-head"
+            appraisal: "jruby-head"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
 
     steps:
       - name: Checkout
@@ -76,9 +76,9 @@ jobs:
       # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
       # We need to do this first to get appraisal installed.
       # NOTE: This does not use the main Gemfile at all.
-      - name: Bundle install for Appraisal ${{ matrix.appraisal }}
+      - name: Install Root Appraisal
         run: bundle
-      - name: Install Appraisal ${{ matrix.appraisal }} dependencies
+      - name: Appraisal for ${{ matrix.appraisal }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle
-      - name: Run ${{ matrix.appraisal }} tests via ${{ matrix.exec_cmd }}
+      - name: Tests for ${{ matrix.ruby }} via ${{ matrix.exec_cmd }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/hoary.yml b/.github/workflows/hoary.yml
new file mode 100644
index 0000000..4975c66
--- /dev/null
+++ b/.github/workflows/hoary.yml
@@ -0,0 +1,62 @@
+# NOTE: Hoary is a synonym of ancient
+name: MRI 2.2 (EOL)
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '!*' # Do not execute on tags
+  pull_request:
+    branches:
+      - '*'
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
+    runs-on: ubuntu-20.04
+    continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
+    env: # $BUNDLE_GEMFILE must be set at job level, so it is set for all steps
+      BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}.gemfile
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Ruby 2.2
+          - ruby: "2.2"
+            appraisal: "ruby-2-2"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby & RubyGems
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          rubygems: ${{ matrix.rubygems }}
+          bundler: ${{ matrix.bundler }}
+          bundler-cache: false
+
+      # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
+      # We need to do this first to get appraisal installed.
+      # NOTE: This does not use the main Gemfile at all.
+      - name: Install Root Appraisal
+        run: bundle
+      - name: Appraisal for ${{ matrix.appraisal }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle
+      - name: Tests for ${{ matrix.ruby }} via ${{ matrix.exec_cmd }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/jruby.yml b/.github/workflows/jruby.yml
new file mode 100644
index 0000000..134d540
--- /dev/null
+++ b/.github/workflows/jruby.yml
@@ -0,0 +1,91 @@
+name: JRuby
+
+env:
+  K_SOUP_COV_DO: false
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '!*' # Do not execute on tags
+  pull_request:
+    branches:
+      - '*'
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
+    runs-on: ubuntu-22.04
+    continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
+    env: # $BUNDLE_GEMFILE must be set at job level, so it is set for all steps
+      BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}.gemfile
+    strategy:
+      matrix:
+        include:
+          # TODO: truffleruby does not support upgrading rubygems; VALIDATE ASSUMPTION that same applies to JRuby
+          # jruby-9.1 (targets Ruby 2.3 compatibility)
+          - ruby: "jruby-9.1"
+            appraisal: "ruby-2-3"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+          # jruby-9.2 (targets Ruby 2.5 compatibility)
+          - ruby: "jruby-9.2"
+            appraisal: "ruby-2-5"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+          # jruby-9.3 (targets Ruby 2.6 compatibility)
+          - ruby: "jruby-9.3"
+            appraisal: "ruby-2-6"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+          # jruby-9.4 (targets Ruby 3.1 compatibility)
+          - ruby: "jruby-9.4"
+            appraisal: "ruby-3-1"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby & RubyGems
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          rubygems: ${{ matrix.rubygems }}
+          bundler: ${{ matrix.bundler }}
+          bundler-cache: false
+
+      # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
+      # We need to do this first to get appraisal installed.
+      # NOTE: This does not use the main Gemfile at all.
+      - name: Install Root Appraisal
+        run: bundle
+      - name: Appraisal for ${{ matrix.appraisal }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle
+      - name: Tests for ${{ matrix.ruby }} via ${{ matrix.exec_cmd }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/legacy.yml b/.github/workflows/legacy.yml
index 8649c23..e2f4e0f 100644
--- a/.github/workflows/legacy.yml
+++ b/.github/workflows/legacy.yml
@@ -1,4 +1,4 @@
-name: Legacy Compat (EOL, Ruby 3.0) Matrix
+name: MRI 3.0 (EOL)
 
 env:
   K_SOUP_COV_DO: false
@@ -26,7 +26,7 @@ concurrency:
 
 jobs:
   test:
-    name: Specs - Ruby ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
     if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-22.04
     continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
@@ -39,7 +39,7 @@ jobs:
           # Ruby 3.0
           - ruby: "3.0"
             appraisal: "ruby-3-0"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
             rubygems: '3.5.23'
             bundler: '2.5.23'
@@ -59,9 +59,9 @@ jobs:
       # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
       # We need to do this first to get appraisal installed.
       # NOTE: This does not use the main Gemfile at all.
-      - name: Bundle install for Appraisal ${{ matrix.appraisal }}
+      - name: Install Root Appraisal
         run: bundle
-      - name: Install Appraisal ${{ matrix.appraisal }} dependencies
+      - name: Appraisal for ${{ matrix.appraisal }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle
-      - name: Run ${{ matrix.appraisal }} tests via ${{ matrix.exec_cmd }}
+      - name: Tests for ${{ matrix.ruby }} via ${{ matrix.exec_cmd }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 62cbe81..b7807ee 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -1,4 +1,4 @@
-name: Ruby - Style
+name: Style
 
 on:
   push:
diff --git a/.github/workflows/supported.yml b/.github/workflows/supported.yml
index 9078d6f..c6acaaa 100644
--- a/.github/workflows/supported.yml
+++ b/.github/workflows/supported.yml
@@ -1,4 +1,4 @@
-name: Supported Compat Matrix
+name: MRI Non-EOL
 
 env:
   K_SOUP_COV_DO: false
@@ -26,7 +26,7 @@ concurrency:
 
 jobs:
   test:
-    name: Specs - Ruby ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
     if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
@@ -36,33 +36,25 @@ jobs:
       matrix:
         include:
           # Ruby 3.1
-          - ruby: "3.1"
+          - ruby: "ruby-3.1"
             appraisal: "ruby-3-1"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
             rubygems: latest
             bundler: latest
 
           # Ruby 3.2
-          - ruby: "3.2"
+          - ruby: "ruby-3.2"
             appraisal: "ruby-3-2"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
             rubygems: latest
             bundler: latest
 
           # Ruby 3.3
-          - ruby: "3.3"
+          - ruby: "ruby-3.3"
             appraisal: "ruby-3-3"
-            exec_cmd: "rake test"
-            gemfile: "Appraisal.root"
-            rubygems: latest
-            bundler: latest
-
-          # Ruby 3.4
-          - ruby: "3.4"
-            appraisal: "ruby-3-4"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
             rubygems: latest
             bundler: latest
@@ -82,9 +74,9 @@ jobs:
       # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
       # We need to do this first to get appraisal installed.
       # NOTE: This does not use the main Gemfile at all.
-      - name: Bundle install for Appraisal ${{ matrix.appraisal }}
+      - name: Install Root Appraisal
         run: bundle
-      - name: Install Appraisal ${{ matrix.appraisal }} dependencies
+      - name: Appraisal for ${{ matrix.ruby }} ${{ matrix.appraisal }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle
-      - name: Run ${{ matrix.appraisal }} tests via ${{ matrix.exec_cmd }}
+      - name: Tests for ${{ matrix.ruby }} ${{ matrix.appraisal }} via ${{ matrix.exec_cmd }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/truffle.yml b/.github/workflows/truffle.yml
new file mode 100644
index 0000000..685950b
--- /dev/null
+++ b/.github/workflows/truffle.yml
@@ -0,0 +1,83 @@
+name: Truffle
+
+env:
+  K_SOUP_COV_DO: false
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '!*' # Do not execute on tags
+  pull_request:
+    branches:
+      - '*'
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
+    runs-on: ubuntu-22.04
+    continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
+    env: # $BUNDLE_GEMFILE must be set at job level, so it is set for all steps
+      BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}.gemfile
+    strategy:
+      matrix:
+        include:
+          # NOTE: truffleruby does not support upgrading rubygems.
+          # truffleruby-22.3 (targets Ruby 3.0 compatibility)
+          - ruby: "truffleruby-22.3"
+            appraisal: "ruby-3-0"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+          # truffleruby-23.0 (targets Ruby 3.1 compatibility)
+          - ruby: "truffleruby-23.0"
+            appraisal: "ruby-3-1"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+          # truffleruby-23.1 (targets Ruby 3.2 compatibility)
+          - ruby: "truffleruby-23.1"
+            appraisal: "ruby-3-2"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: default
+            bundler: default
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby & RubyGems
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          rubygems: ${{ matrix.rubygems }}
+          bundler: ${{ matrix.bundler }}
+          bundler-cache: false
+
+      # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
+      # We need to do this first to get appraisal installed.
+      # NOTE: This does not use the main Gemfile at all.
+      - name: Install Root Appraisal
+        run: bundle
+      - name: Appraisal for ${{ matrix.appraisal }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle
+      - name: Tests for ${{ matrix.ruby }} via ${{ matrix.exec_cmd }}
+        run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.github/workflows/unsupported.yml b/.github/workflows/unsupported.yml
index be74199..e515cc8 100644
--- a/.github/workflows/unsupported.yml
+++ b/.github/workflows/unsupported.yml
@@ -1,4 +1,4 @@
-name: Unsupported Compat (EOL, Ruby 2.7) Matrix
+name: MRI 2.6 & 2.7 (EOL)
 
 env:
   K_SOUP_COV_DO: false
@@ -26,7 +26,7 @@ concurrency:
 
 jobs:
   test:
-    name: Specs - Ruby ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
+    name: Specs ${{ matrix.ruby }} ${{ matrix.appraisal }}${{ matrix.name_extra || '' }}
     if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-22.04
     continue-on-error: ${{ matrix.experimental || endsWith(matrix.ruby, 'head') }}
@@ -36,10 +36,18 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          # Ruby 2.6
+          - ruby: "ruby-2.6"
+            appraisal: "ruby-2-6"
+            exec_cmd: "rake spec"
+            gemfile: "Appraisal.root"
+            rubygems: '3.4.22'
+            bundler: '2.4.22'
+
           # Ruby 2.7
-          - ruby: "2.7"
+          - ruby: "ruby-2.7"
             appraisal: "ruby-2-7"
-            exec_cmd: "rake test"
+            exec_cmd: "rake spec"
             gemfile: "Appraisal.root"
             rubygems: '3.4.22'
             bundler: '2.4.22'
@@ -59,9 +67,9 @@ jobs:
       # Raw `bundle` will use the BUNDLE_GEMFILE set to matrix.gemfile (i.e. Appraisal.root)
       # We need to do this first to get appraisal installed.
       # NOTE: This does not use the main Gemfile at all.
-      - name: Bundle install for Appraisal ${{ matrix.appraisal }}
+      - name: Install Root Appraisal
         run: bundle
-      - name: Install Appraisal ${{ matrix.appraisal }} dependencies
+      - name: Appraisal for ${{ matrix.appraisal }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle
-      - name: Run ${{ matrix.appraisal }} tests via ${{ matrix.exec_cmd }}
+      - name: Tests for ${{ matrix.ruby }} via ${{ matrix.exec_cmd }}
         run: bundle exec appraisal ${{ matrix.appraisal }} bundle exec ${{ matrix.exec_cmd }}
diff --git a/.gitignore b/.gitignore
index b04a8c8..1f36053 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,7 @@
 
 # rspec failure tracking
 .rspec_status
+
+*.gem
+gemfiles/*.gemfile.lock
+Appraisal.*.gemfile.lock
diff --git a/.rspec b/.rspec
index 34c5164..b95daa8 100644
--- a/.rspec
+++ b/.rspec
@@ -1,3 +1,4 @@
 --format documentation
 --color
 --require spec_helper
+--warnings
diff --git a/.rubocop_gradual.lock b/.rubocop_gradual.lock
new file mode 100644
index 0000000..c3fe582
--- /dev/null
+++ b/.rubocop_gradual.lock
@@ -0,0 +1,27 @@
+{
+  "lib/gem_checksums.rb:2187774111": [
+    [46, 9, 2, "Lint/Syntax: unexpected token tLSHFT\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 5859461],
+    [47, 35, 8, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 3746595442],
+    [48, 23, 6, "Lint/Syntax: unexpected token kENSURE\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 1164465823],
+    [48, 59, 9, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 3934292795],
+    [49, 24, 4, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 2087717786],
+    [49, 77, 3, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 193422044],
+    [51, 20, 1, "Lint/Syntax: unexpected token tCOLON\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 177567],
+    [51, 56, 1, "Lint/Syntax: unexpected token tSTAR\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 177551],
+    [51, 71, 3, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 193422044],
+    [51, 79, 1, "Lint/Syntax: unexpected token tCOMMA\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 177545],
+    [51, 110, 2, "Lint/Syntax: unexpected token kOR\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 5861240],
+    [55, 14, 3, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 193440548],
+    [56, 22, 17, "Lint/Syntax: unexpected token tCONSTANT\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 3377418749],
+    [56, 62, 18, "Lint/Syntax: unexpected token tGVAR\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 3988824313],
+    [57, 18, 3, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 193422044],
+    [57, 48, 4, "Lint/Syntax: unexpected token kTHEN\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 2087960114],
+    [58, 29, 2, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 5860997],
+    [58, 56, 6, "Lint/Syntax: unexpected token kMODULE\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 1465948607],
+    [60, 14, 4, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 2087597937],
+    [61, 19, 1, "Lint/Syntax: unexpected token tUMINUS\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 177544],
+    [65, 60, 18, "Lint/Syntax: unexpected token tGVAR\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 3988824313],
+    [135, 63, 4, "Lint/Syntax: unexpected token tIDENTIFIER\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 2087436318],
+    [135, 67, 1, "Lint/Syntax: unterminated string meets end of file\n(Using Ruby 2.2 parser; configure using `TargetRubyVersion` parameter, under `AllCops`)", 177605]
+  ]
+}
diff --git a/.tool-versions b/.tool-versions
index 041df9a..ae5ecdb 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-ruby 3.4.1
+ruby 3.4.2
diff --git a/.yardopts b/.yardopts
new file mode 100644
index 0000000..f9cf06c
--- /dev/null
+++ b/.yardopts
@@ -0,0 +1 @@
+--plugin junk
diff --git a/Appraisal.root.gemfile b/Appraisal.root.gemfile
new file mode 100644
index 0000000..3d53a93
--- /dev/null
+++ b/Appraisal.root.gemfile
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
+
+source "https://rubygems.org"
+
+# Appraisal Root Gemfile is for running appraisal to generate the Appraisal Gemfiles
+#   in gemfiles/*gemfile.
+# On CI, we use it for the Appraisal-based builds.
+# We do not load the standard Gemfile, as it is tailored for local development.
+
+gemspec
+
+gem "appraisal", github: "pboling/appraisal", branch: "galtzo"
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..b4a5c13
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,101 @@
+# frozen_string_literal: true
+
+appraise "ruby-2-2" do
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-2-3" do
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-2-4" do
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-2-5" do
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-2-6" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-2-7" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-3-0" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-3-1" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-3-2" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-3-3" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-current" do
+  gem "mutex_m", ">= 0.2"
+  gem "stringio", ">= 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+# Only run security audit on latest Ruby version
+appraise "audit" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  eval_gemfile "modular/audit.gemfile"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+# Only run coverage on latest Ruby version
+appraise "coverage" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  eval_gemfile "modular/coverage.gemfile"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+# Only run linter on latest Ruby version (but, in support of oldest supported Ruby version)
+appraise "style" do
+  gem "mutex_m", "~> 0.2"
+  gem "stringio", "~> 3.0"
+  eval_gemfile "modular/style.gemfile"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "ruby-head" do
+  gem "mutex_m", ">= 0.2"
+  gem "stringio", ">= 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "truffleruby-head" do
+  gem "mutex_m", ">= 0.2"
+  gem "stringio", ">= 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
+
+appraise "jruby-head" do
+  gem "mutex_m", ">= 0.2"
+  gem "stringio", ">= 3.0"
+  remove_gem "appraisal" # only present because it must be in the gemfile because we target a git branch
+end
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1dd0b69..682f2e1 100755
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -21,6 +21,22 @@ Simply follow these instructions:
 6. Make sure to add tests for it. This is important, so it doesn't break in a future release.
 7. Create new Pull Request.
 
+## Appraisals
+
+From time to time the appraisal gemfiles in `gemfiles/` will need to be updated.
+They are created and updated with the commands:
+
+NOTE: We run on a [fork][🚎appraisal-fork] of Appraisal.
+
+Please upvote the PR for `eval_gemfile` [support][🚎appraisal-eval-gemfile-pr]
+
+```shell
+BUNDLE_GEMFILE=Appraisal.root.gemfile bundle
+BUNDLE_GEMFILE=Appraisal.root.gemfile bundle exec appraisal update
+```
+
+When adding an appraisal to CI check the [runner tool cache][🏃‍♂️runner-tool-cache] to see which runner to use.
+
 ## The Reek List
 
 Take a look at the `reek` list which is the file called `REEK` and find something to improve.
@@ -50,7 +66,7 @@ bundle exec rake
 Or just run the linter.
 
 ```bash
-bundle exec rubocop_gradual:autocorrect
+bundle exec rake rubocop_gradual:autocorrect
 ```
 
 ## Contributors
@@ -61,7 +77,7 @@ Your picture could be here!
 
 Made with [contributors-img][🖐contrib-rocks].
 
-Also see GitLab Contributors: [https://gitlab.com/oauth-xx/version_gem/-/graphs/main][🚎contributors]
+Also see GitLab Contributors: [https://gitlab.com/pboling/gem_checksums/-/graphs/main][🚎contributors-gl]
 
 ## For Maintainers
 
@@ -75,7 +91,7 @@ See: [RubyGems Security Guide][🔒️rubygems-security-guide]
 ### To release a new version:
 
 1. Run `bin/setup && bin/rake` as a tests, coverage, & linting sanity check
-2. Update the version number in `version.rb`
+2. Update the version number in `version.rb`, and ensure `CHANGELOG.md` reflects changes
 3. Run `bin/setup && bin/rake` again as a secondary check, and to update `Gemfile.lock`
 4. Run `git commit -am "🔖 Prepare release v<VERSION>"` to commit the changes
 5. Run `git push` to trigger the final CI pipeline before release, & merge PRs
@@ -89,20 +105,29 @@ See: [RubyGems Security Guide][🔒️rubygems-security-guide]
    - Note that you'll need the `zsh/datetime` module, if running `zsh`.
    - In `bash` you can use `date +%s` instead, i.e. `export SOURCE_DATE_EPOCH=$(date +%s) && echo $SOURCE_DATE_EPOCH`
 10. Run `bundle exec rake build`
-11. Run `gem_checksums` (from this gem, and added to path in .envrc, more [context][🔒️rubygems-checksums-pr]) to create SHA-256 and SHA-512 checksums
+11. Run `gem_checksums` (more context [1][🔒️rubygems-checksums-pr] and [2][🔒️rubygems-guides-pr])
+   to create SHA-256 and SHA-512 checksums
     - Checksums will be committed automatically by the script, but not pushed
 12. Run `bundle exec rake release` which will create a git tag for the version,
-    push git commits and tags, and push the `.gem` file to [rubygems.org][💎rubygems]
+   push git commits and tags, and push the `.gem` file to [rubygems.org][💎rubygems]
 
+[⛳mail-list]: http://groups.google.com/group/oauth-ruby
+[🚎src-main]: https://gitlab.com/pboling/gem_checksums
 [🧪build]: https://github.com/pboling/gem_checksums/actions
-[🤝conduct]: https://github.com/pboling/gem_checksums/blob/main/CODE_OF_CONDUCT.md
+[🏘chat]: https://matrix.to/#/#pboling_version_gem:gitter.im
+[🤝conduct]: https://gitlab.com/pboling/gem_checksums/-/blob/main/CODE_OF_CONDUCT.md
 [🖐contrib-rocks]: https://contrib.rocks
-[🚎contributors]: https://gitlab.com/pboling/gem_checksums/-/graphs/main
 [🖐contributors]: https://github.com/pboling/gem_checksums/graphs/contributors
+[🚎contributors-gl]: https://gitlab.com/pboling/gem_checksums/-/graphs/main
 [🖐contributors-img]: https://contrib.rocks/image?repo=pboling/gem_checksums
-[📗keep-changelog]: https://keepachangelog.com/en/1.0.0/
-[📗keep-changelog-img]: https://img.shields.io/badge/keep--a--changelog-1.0.0-FFDD67.svg?style=flat
 [💎rubygems]: https://rubygems.org
 [🔒️rubygems-security-guide]: https://guides.rubygems.org/security/#building-gems
-[🔒️rubygems-checksums-pr]: https://github.com/rubygems/guides/pull/325
-[🚎src-main]: https://github.com/pboling/gem_checksums
+[🔒️rubygems-checksums-pr]: https://github.com/rubygems/rubygems/pull/6022
+[🔒️rubygems-guides-pr]: https://github.com/rubygems/guides/pull/325
+[📗keep-changelog]: https://keepachangelog.com/en/1.0.0/
+[📗keep-changelog-img]: https://img.shields.io/badge/keep--a--changelog-1.0.0-FFDD67.svg?style=flat
+[📌semver-breaking]: https://github.com/semver/semver/issues/716#issuecomment-869336139
+[📌major-versions-not-sacred]: https://tom.preston-werner.com/2022/05/23/major-version-numbers-are-not-sacred.html
+[🚎appraisal-eval-gemfile-pr]: https://github.com/thoughtbot/appraisal/pull/248
+[🚎appraisal-fork]: https://github.com/pboling/appraisal/tree/galtzo
+[🏃‍♂️runner-tool-cache]: https://github.com/ruby/ruby-builder/releases/tag/toolcache
diff --git a/Gemfile b/Gemfile
index 2b96f79..1c99398 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,17 +2,50 @@
 
 source "https://rubygems.org"
 
-# Specify your gem's dependencies in gem_checksums.gemspec
-gemspec
+git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
+git_source(:gitlab) { |repo_name| "https://gitlab.com/#{repo_name}" }
+
+#### IMPORTANT #######################################################
+# Gemfile is for local development ONLY; Gemfile is NOT loaded in CI #
+####################################################### IMPORTANT ####
+
+# For Ruby version specific dependencies
+ruby_version = Gem::Version.create(RUBY_VERSION)
 
-### Std Lib Extracted Gems
-gem "mutex_m", "~> 0.2"
-gem "stringio", "~> 3.1", ">= 3.1.2"
-gem "benchmark", "~> 0.4"
+# Include dependencies from <gem name>.gemspec
+gemspec
 
 platform :mri do
-  ### Debugging (MRI Only)
-  gem "byebug", ">= 11"
+  # Debugging - Ensure ENV["DEBUG"] == "true" to use debuggers within spec suite
+  if ruby_version < Gem::Version.new("2.7")
+    # Use byebug in code
+    gem "byebug", ">= 11"
+  else
+    # Use binding.break, binding.b, or debugger in code
+    gem "debug", ">= 1.0.0"
+  end
+
+  # Dev Console - Binding.pry - Irb replacement
+  gem "pry", "~> 0.14"                     # ruby >= 2.0
+
+  gem "reek", "~> 6.4"
 end
 
+# Security Audit
+if ruby_version >= Gem::Version.create("3")
+  # NOTE: Audit fails on Ruby 2.7 because nokogiri has dropped support for Ruby < 3
+  # See: https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-r95h-9x8f-r3f7
+  # We can't add upgraded nokogiri here unless we are developing on Ruby 3+
+  eval_gemfile "gemfiles/modular/audit.gemfile"
+end
+
+# Code Coverage
+eval_gemfile "gemfiles/modular/coverage.gemfile"
+
+# Linting
+eval_gemfile "gemfiles/modular/style.gemfile"
+
+# Documentation
+eval_gemfile "gemfiles/modular/documentation.gemfile"
+
 gem "appraisal", github: "pboling/appraisal", branch: "galtzo"
diff --git a/Gemfile.lock b/Gemfile.lock
index b308716..6128b6c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,18 @@
+GIT
+  remote: https://github.com/pboling/appraisal
+  revision: f5b830cb783ecb83e271c18c29c827af4986578d
+  branch: galtzo
+  specs:
+    appraisal (3.0.0.rc1)
+      bundler (>= 1.17.3)
+      rake (>= 10)
+      thor (>= 0.14.0)
+
 PATH
   remote: .
   specs:
     gem_checksums (1.0.0)
-      version_gem (>= 1.1.4, < 3)
+      version_gem (>= 1.1.5, < 3)
 
 GEM
   remote: https://rubygems.org/
@@ -12,10 +22,16 @@ GEM
     backports (3.25.0)
     benchmark (0.4.0)
     bigdecimal (3.1.9)
-    byebug (11.1.3)
+    bundler-audit (0.9.2)
+      bundler (>= 1.2.0, < 3)
+      thor (~> 1.0)
+    coderay (1.1.3)
     concurrent-ruby (1.3.5)
     date (3.4.1)
-    diff-lcs (1.5.1)
+    debug (1.10.0)
+      irb (~> 1.10)
+      reline (>= 0.3.8)
+    diff-lcs (1.6.0)
     diffy (3.4.3)
     docile (1.4.1)
     dry-configurable (1.3.0)
@@ -48,7 +64,12 @@ GEM
       dry-logic (~> 1.4)
       zeitwerk (~> 2.6)
     github-markup (5.0.1)
-    json (2.9.1)
+    io-console (0.8.0)
+    irb (1.15.1)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.10.1)
     kettle-soup-cover (1.0.4)
       simplecov (~> 0.22)
       simplecov-cobertura (~> 2.1)
@@ -60,20 +81,26 @@ GEM
       version_gem (~> 1.1, >= 1.1.4)
     language_server-protocol (3.17.0.4)
     lint_roller (1.1.0)
-    logger (1.6.5)
-    mutex_m (0.3.0)
+    logger (1.6.6)
+    method_source (1.1.0)
     ostruct (0.6.1)
     parallel (1.26.3)
-    parser (3.3.7.0)
+    parser (3.3.7.1)
       ast (~> 2.4.1)
       racc
+    pp (0.6.2)
+      prettyprint
+    prettyprint (0.2.0)
+    pry (0.15.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
     psych (5.2.3)
       date
       stringio
     racc (1.8.1)
     rainbow (3.1.1)
     rake (13.2.1)
-    rdoc (6.11.0)
+    rdoc (6.12.0)
       psych (>= 4.0.0)
     redcarpet (3.6.0)
     reek (6.4.0)
@@ -83,13 +110,15 @@ GEM
       rainbow (>= 2.0, < 4.0)
       rexml (~> 3.1)
     regexp_parser (2.10.0)
-    rexml (3.4.0)
+    reline (0.6.0)
+      io-console (~> 0.5)
+    rexml (3.4.1)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
       rspec-mocks (~> 3.13.0)
     rspec-block_is_expected (1.0.6)
-    rspec-core (3.13.2)
+    rspec-core (3.13.3)
       rspec-support (~> 3.13.0)
     rspec-expectations (3.13.3)
       diff-lcs (>= 1.2.0, < 2.0)
@@ -99,14 +128,14 @@ GEM
       rspec-support (~> 3.13.0)
     rspec-stubbed_env (1.0.1)
     rspec-support (3.13.2)
-    rubocop (1.70.0)
+    rubocop (1.71.2)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.36.2, < 2.0)
+      rubocop-ast (>= 1.38.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
     rubocop-ast (1.38.0)
@@ -117,8 +146,8 @@ GEM
       parallel (~> 1.10)
       rainbow (>= 2.2.2, < 4.0)
       rubocop (~> 1.0)
-    rubocop-lts (18.2.1)
-      rubocop-ruby2_7 (>= 2.0.4, < 3)
+    rubocop-lts (8.1.1)
+      rubocop-ruby2_2 (>= 2.0.3, < 3)
       standard-rubocop-lts (>= 1.0.3, < 3)
       version_gem (>= 1.1.2, < 3)
     rubocop-md (1.2.4)
@@ -132,7 +161,7 @@ GEM
       rubocop (~> 1.0)
     rubocop-rspec (3.4.0)
       rubocop (~> 1.61)
-    rubocop-ruby2_7 (2.0.6)
+    rubocop-ruby2_2 (2.0.5)
       rubocop-gradual (~> 0.3, >= 0.3.1)
       rubocop-md (~> 1.2)
       rubocop-rake (~> 0.6)
@@ -152,7 +181,7 @@ GEM
     simplecov-cobertura (2.1.0)
       rexml
       simplecov (~> 0.19)
-    simplecov-console (0.9.2)
+    simplecov-console (0.9.3)
       ansi
       simplecov
       terminal-table
@@ -161,10 +190,10 @@ GEM
     simplecov-rcov (0.3.7)
       simplecov (>= 0.4.1)
     simplecov_json_formatter (0.1.4)
-    standard (1.44.0)
+    standard (1.45.0)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
-      rubocop (~> 1.70.0)
+      rubocop (~> 1.71.0)
       standard-custom (~> 1.0.0)
       standard-performance (~> 1.6)
     standard-custom (1.0.2)
@@ -179,46 +208,48 @@ GEM
       standard-custom (>= 1.0.2, < 2)
       standard-performance (>= 1.3.1, < 2)
       version_gem (>= 1.1.4, < 3)
-    stringio (3.1.2)
+    stringio (3.1.5)
     terminal-table (4.0.0)
       unicode-display_width (>= 1.1.1, < 4)
+    thor (1.3.2)
     unicode-display_width (3.1.4)
       unicode-emoji (~> 4.0, >= 4.0.4)
     unicode-emoji (4.0.4)
-    version_gem (1.1.4)
+    version_gem (1.1.5)
     yard (0.9.37)
     yard-junk (0.0.10)
       backports (>= 3.18)
       ostruct
       rainbow
       yard
-    zeitwerk (2.7.1)
+    zeitwerk (2.7.2)
 
 PLATFORMS
   arm64-darwin-24
   ruby
 
 DEPENDENCIES
+  appraisal!
   benchmark (~> 0.4)
-  byebug (>= 11)
+  bundler-audit (~> 0.9.2)
+  debug (>= 1.0.0)
   gem_checksums!
   github-markup (~> 5.0, >= 5.0.1)
   kettle-soup-cover (~> 1.0, >= 1.0.4)
-  mutex_m (~> 0.2)
-  rake (~> 13.2, >= 13.2.1)
+  pry (~> 0.14)
+  rake (~> 13.0)
   rdoc (~> 6.11)
   redcarpet (~> 3.6)
   reek (~> 6.4)
   rspec (~> 3.13)
-  rspec-block_is_expected (~> 1.0, >= 1.0.6)
+  rspec-block_is_expected (~> 1.0)
   rspec-stubbed_env (~> 1.0, >= 1.0.1)
-  rubocop-lts (~> 18.2, >= 18.2.1)
+  rubocop-lts (~> 8.1, >= 8.1.1)
   rubocop-packaging (~> 0.5, >= 0.5.2)
-  rubocop-rspec (~> 3.4)
-  standard (~> 1.44)
-  stringio (~> 3.1, >= 3.1.2)
+  rubocop-rspec (~> 3.2)
+  standard (>= 1.35.1, != 1.42.0, != 1.41.1)
   yard (~> 0.9, >= 0.9.37)
   yard-junk (~> 0.0, >= 0.0.10)
 
 BUNDLED WITH
-   2.6.3
+   2.6.5
diff --git a/LICENSE.txt b/LICENSE.txt
index 1140c67..808a78c 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2025 Peter Boling
+Copyright (c) 2022 - 2025 Peter Boling
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index a55408c..eabe043 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ A ruby script, and rake task, to generate SHA-256 and SHA-512 checksums of RubyG
 
 You may be familiar with the standard rake task `build:checksum` from RubyGems.
 This gem ships an improved version as `build:checksums`, based on the
-[RubyGems pull request and discussion here](https://github.com/rubygems/rubygems/pull/6022).
+[RubyGems pull request](https://github.com/rubygems/rubygems/pull/6022) I started in October 2022.
 
 ```shell
 rake build:checksums
@@ -41,7 +41,7 @@ gem install gem_checksums
 
 You may be familiar with the standard rake task `build:checksum` from RubyGems.
 This gem ships an improved version as `build:checksums`, based on the
-[RubyGems pull request and discussion here](https://github.com/rubygems/rubygems/pull/6022).
+[RubyGems pull request and discussion here][🔒️rubygems-checksums-pr].
 
 ```shell
 rake build:checksums
@@ -101,7 +101,7 @@ To install this gem onto your local machine, run `bundle exec rake install`. To
 
 ### TODOs
 
-- [] Prepend `rake build` task with check for `SOURCE_DATE_EPOCH` environment variable, and raise error if not set.
+- [ ] Prepend `rake build` task with check for `SOURCE_DATE_EPOCH` environment variable, and raise error if not set.
 
 ## Contributing
 
diff --git a/Rakefile b/Rakefile
index d88170b..3dedc5c 100644
--- a/Rakefile
+++ b/Rakefile
@@ -66,13 +66,5 @@ rescue LoadError
   task(coverage: :spec)
 end
 
-default_tasks =
-  if ENV.fetch("CI", "false").casecmp?("false")
-    # Open coverage in browser locally
-    %i[coverage rubocop_gradual:autocorrect yard yard:junk]
-  else
-    # Run coverage, but do not open in browser, in CI
-    %i[spec rubocop_gradual:check yard yard:junk]
-  end
-
-task default: default_tasks
+# coverage task will open coverage in browser locally
+task default: %i[coverage rubocop_gradual:autocorrect yard yard:junk]
diff --git a/gem_checksums.gemspec b/gem_checksums.gemspec
index c315c8a..0553da1 100644
--- a/gem_checksums.gemspec
+++ b/gem_checksums.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.description = "Generate both SHA256 & SHA512 checksums into the checksums directory, and git commit them"
   spec.homepage = "https://github.com/pboling/gem_checksums"
   spec.license = "MIT"
-  spec.required_ruby_version = ">= 2.7.0"
+  spec.required_ruby_version = ">= 2.2.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["homepage_uri"] = "https://railsbling.com/tags/#{spec.name}/"
@@ -67,28 +67,19 @@ Gem::Specification.new do |spec|
   ]
   spec.require_paths = ["lib"]
 
-  spec.add_dependency("version_gem", ">= 1.1.4", "< 3")
+  spec.add_dependency("version_gem", ">= 1.1.5", "< 3")
 
-  ### Documentation
-  spec.add_development_dependency("github-markup", "~> 5.0", ">= 5.0.1")
-  spec.add_development_dependency("rdoc", "~> 6.11")
-  spec.add_development_dependency("redcarpet", "~> 3.6")
-  spec.add_development_dependency("yard", "~> 0.9", ">= 0.9.37")
-  spec.add_development_dependency("yard-junk", "~> 0.0", ">= 0.0.10")
+  # Tests
+  spec.add_development_dependency("rspec", "~> 3.13")                         # ruby >= 0
+  spec.add_development_dependency("rspec-block_is_expected", "~> 1.0")        # ruby >= 1.8.7
+  spec.add_development_dependency("rspec-stubbed_env", "~> 1.0", ">= 1.0.1")  # Ruby >= 1.8.7
 
-  ###  Linting
-  spec.add_development_dependency("reek", "~> 6.4")
-  spec.add_development_dependency("rubocop-lts", "~> 18.2", ">= 18.2.1")
-  spec.add_development_dependency("rubocop-packaging", "~> 0.5", ">= 0.5.2")
-  spec.add_development_dependency("rubocop-rspec", "~> 3.4")
-  spec.add_development_dependency("standard", "~> 1.44")
+  # Development Tasks
+  spec.add_development_dependency("rake", "~> 13.0")                          # ruby >= 2.2
 
-  ### Testing
-  spec.add_development_dependency("rake", "~> 13.2", ">= 13.2.1")
-  spec.add_development_dependency("rspec", "~> 3.13")
-  spec.add_development_dependency("rspec-block_is_expected", "~> 1.0", ">= 1.0.6")
-  spec.add_development_dependency("rspec-stubbed_env", "~> 1.0", ">= 1.0.1")
-
-  ### Coverage
-  spec.add_development_dependency("kettle-soup-cover", "~> 1.0", ">= 1.0.4")
+  # Linting - rubocop-lts v8 is a rubocop wrapper for Ruby >= 2.2,
+  #   and should only be bumped when dropping old Ruby support
+  # NOTE: it can only be installed on, and run on Ruby >= 2.7, so we add the dependency in the Gemfile.
+  # see: https://rubocop-lts.gitlab.io
+  # spec.add_development_dependency 'rubocop-lts', ['~> 8.1', '>= 8.1.1']
 end
diff --git a/gemfiles/audit.gemfile b/gemfiles/audit.gemfile
new file mode 100644
index 0000000..b93d318
--- /dev/null
+++ b/gemfiles/audit.gemfile
@@ -0,0 +1,10 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
+
+eval_gemfile("modular/audit.gemfile")
diff --git a/gemfiles/audit.gemfile.lock b/gemfiles/audit.gemfile.lock
new file mode 100644
index 0000000..47d418a
--- /dev/null
+++ b/gemfiles/audit.gemfile.lock
@@ -0,0 +1,54 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    bundler-audit (0.9.2)
+      bundler (>= 1.2.0, < 3)
+      thor (~> 1.0)
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    thor (1.3.2)
+    version_gem (1.1.5)
+
+PLATFORMS
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
+
+DEPENDENCIES
+  bundler-audit (~> 0.9.2)
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/coverage.gemfile b/gemfiles/coverage.gemfile
new file mode 100644
index 0000000..ec3037b
--- /dev/null
+++ b/gemfiles/coverage.gemfile
@@ -0,0 +1,10 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
+
+eval_gemfile("modular/coverage.gemfile")
diff --git a/gemfiles/coverage.gemfile.lock b/gemfiles/coverage.gemfile.lock
new file mode 100644
index 0000000..18e378d
--- /dev/null
+++ b/gemfiles/coverage.gemfile.lock
@@ -0,0 +1,77 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ansi (1.5.0)
+    diff-lcs (1.6.0)
+    docile (1.4.1)
+    kettle-soup-cover (1.0.4)
+      simplecov (~> 0.22)
+      simplecov-cobertura (~> 2.1)
+      simplecov-console (~> 0.9, >= 0.9.1)
+      simplecov-html (~> 0.12)
+      simplecov-lcov (~> 0.8)
+      simplecov-rcov (~> 0.3, >= 0.3.3)
+      simplecov_json_formatter (~> 0.1, >= 0.1.4)
+      version_gem (~> 1.1, >= 1.1.4)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rexml (3.4.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-console (0.9.3)
+      ansi
+      simplecov
+      terminal-table
+    simplecov-html (0.13.1)
+    simplecov-lcov (0.8.0)
+    simplecov-rcov (0.3.7)
+      simplecov (>= 0.4.1)
+    simplecov_json_formatter (0.1.4)
+    stringio (3.1.5)
+    terminal-table (4.0.0)
+      unicode-display_width (>= 1.1.1, < 4)
+    unicode-display_width (3.1.4)
+      unicode-emoji (~> 4.0, >= 4.0.4)
+    unicode-emoji (4.0.4)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  kettle-soup-cover (~> 1.0, >= 1.0.4)
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/jruby_head.gemfile b/gemfiles/jruby_head.gemfile
new file mode 100644
index 0000000..49b0671
--- /dev/null
+++ b/gemfiles/jruby_head.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", ">= 0.2"
+gem "stringio", ">= 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/jruby_head.gemfile.lock b/gemfiles/jruby_head.gemfile.lock
new file mode 100644
index 0000000..bedf71a
--- /dev/null
+++ b/gemfiles/jruby_head.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (>= 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (>= 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/modular/audit.gemfile b/gemfiles/modular/audit.gemfile
new file mode 100644
index 0000000..e5cc919
--- /dev/null
+++ b/gemfiles/modular/audit.gemfile
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+# Many gems are dropping support for Ruby < 3,
+#   so we only want to run our security audit in CI on Ruby 3+
+gem "bundler-audit", "~> 0.9.2"
diff --git a/gemfiles/modular/coverage.gemfile b/gemfiles/modular/coverage.gemfile
new file mode 100644
index 0000000..c7756b9
--- /dev/null
+++ b/gemfiles/modular/coverage.gemfile
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+# We run code coverage on the latest version of Ruby only.
+
+# Coverage
+gem "kettle-soup-cover", "~> 1.0", ">= 1.0.4"
diff --git a/gemfiles/modular/documentation.gemfile b/gemfiles/modular/documentation.gemfile
new file mode 100644
index 0000000..d33cb4d
--- /dev/null
+++ b/gemfiles/modular/documentation.gemfile
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+# Documentation
+gem "github-markup", "~> 5.0", ">= 5.0.1"
+gem "redcarpet", "~> 3.6"
+gem "yard", "~> 0.9", ">= 0.9.37", require: false
+gem "yard-junk", "~> 0.0", ">= 0.0.10"
+
+# Std Lib extractions
+gem "rdoc", "~> 6.11"
diff --git a/gemfiles/modular/style.gemfile b/gemfiles/modular/style.gemfile
new file mode 100644
index 0000000..7c1b174
--- /dev/null
+++ b/gemfiles/modular/style.gemfile
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+# We run rubocop on the latest version of Ruby,
+#   but in support of the oldest supported version of Ruby
+
+gem "rubocop-lts", "~> 8.1", ">= 8.1.1" # Linting for Ruby >= 2.2
+gem "rubocop-packaging", "~> 0.5", ">= 0.5.2"
+gem "rubocop-rspec", "~> 3.2"
+gem "standard", ">= 1.35.1", "!= 1.41.1", "!= 1.42.0"
+
+# Std Lib extractions
+gem "benchmark", "~> 0.4" # Removed from Std Lib in Ruby 3.5
diff --git a/gemfiles/ruby_2_2.gemfile b/gemfiles/ruby_2_2.gemfile
new file mode 100644
index 0000000..095e660
--- /dev/null
+++ b/gemfiles/ruby_2_2.gemfile
@@ -0,0 +1,5 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2_2.gemfile.lock b/gemfiles/ruby_2_2.gemfile.lock
new file mode 100644
index 0000000..905872f
--- /dev/null
+++ b/gemfiles/ruby_2_2.gemfile.lock
@@ -0,0 +1,39 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+
+BUNDLED WITH
+   2.6.5
diff --git a/gemfiles/ruby_2_3.gemfile b/gemfiles/ruby_2_3.gemfile
new file mode 100644
index 0000000..095e660
--- /dev/null
+++ b/gemfiles/ruby_2_3.gemfile
@@ -0,0 +1,5 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2_3.gemfile.lock b/gemfiles/ruby_2_3.gemfile.lock
new file mode 100644
index 0000000..523006c
--- /dev/null
+++ b/gemfiles/ruby_2_3.gemfile.lock
@@ -0,0 +1,39 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_2_4.gemfile b/gemfiles/ruby_2_4.gemfile
new file mode 100644
index 0000000..095e660
--- /dev/null
+++ b/gemfiles/ruby_2_4.gemfile
@@ -0,0 +1,5 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2_4.gemfile.lock b/gemfiles/ruby_2_4.gemfile.lock
new file mode 100644
index 0000000..523006c
--- /dev/null
+++ b/gemfiles/ruby_2_4.gemfile.lock
@@ -0,0 +1,39 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_2_5.gemfile b/gemfiles/ruby_2_5.gemfile
new file mode 100644
index 0000000..095e660
--- /dev/null
+++ b/gemfiles/ruby_2_5.gemfile
@@ -0,0 +1,5 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2_5.gemfile.lock b/gemfiles/ruby_2_5.gemfile.lock
new file mode 100644
index 0000000..523006c
--- /dev/null
+++ b/gemfiles/ruby_2_5.gemfile.lock
@@ -0,0 +1,39 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_2_6.gemfile b/gemfiles/ruby_2_6.gemfile
new file mode 100644
index 0000000..ed1eb63
--- /dev/null
+++ b/gemfiles/ruby_2_6.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2_6.gemfile.lock b/gemfiles/ruby_2_6.gemfile.lock
new file mode 100644
index 0000000..76ee0cc
--- /dev/null
+++ b/gemfiles/ruby_2_6.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_2_7.gemfile b/gemfiles/ruby_2_7.gemfile
new file mode 100644
index 0000000..ed1eb63
--- /dev/null
+++ b/gemfiles/ruby_2_7.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_2_7.gemfile.lock b/gemfiles/ruby_2_7.gemfile.lock
new file mode 100644
index 0000000..76ee0cc
--- /dev/null
+++ b/gemfiles/ruby_2_7.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_3_0.gemfile b/gemfiles/ruby_3_0.gemfile
new file mode 100644
index 0000000..ed1eb63
--- /dev/null
+++ b/gemfiles/ruby_3_0.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3_0.gemfile.lock b/gemfiles/ruby_3_0.gemfile.lock
new file mode 100644
index 0000000..76ee0cc
--- /dev/null
+++ b/gemfiles/ruby_3_0.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_3_1.gemfile b/gemfiles/ruby_3_1.gemfile
new file mode 100644
index 0000000..ed1eb63
--- /dev/null
+++ b/gemfiles/ruby_3_1.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3_1.gemfile.lock b/gemfiles/ruby_3_1.gemfile.lock
new file mode 100644
index 0000000..76ee0cc
--- /dev/null
+++ b/gemfiles/ruby_3_1.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_3_2.gemfile b/gemfiles/ruby_3_2.gemfile
new file mode 100644
index 0000000..ed1eb63
--- /dev/null
+++ b/gemfiles/ruby_3_2.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3_2.gemfile.lock b/gemfiles/ruby_3_2.gemfile.lock
new file mode 100644
index 0000000..76ee0cc
--- /dev/null
+++ b/gemfiles/ruby_3_2.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_3_3.gemfile b/gemfiles/ruby_3_3.gemfile
new file mode 100644
index 0000000..ed1eb63
--- /dev/null
+++ b/gemfiles/ruby_3_3.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_3_3.gemfile.lock b/gemfiles/ruby_3_3.gemfile.lock
new file mode 100644
index 0000000..76ee0cc
--- /dev/null
+++ b/gemfiles/ruby_3_3.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/ruby_current.gemfile b/gemfiles/ruby_current.gemfile
new file mode 100644
index 0000000..49b0671
--- /dev/null
+++ b/gemfiles/ruby_current.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", ">= 0.2"
+gem "stringio", ">= 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_head.gemfile b/gemfiles/ruby_head.gemfile
new file mode 100644
index 0000000..49b0671
--- /dev/null
+++ b/gemfiles/ruby_head.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", ">= 0.2"
+gem "stringio", ">= 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/ruby_head.gemfile.lock b/gemfiles/ruby_head.gemfile.lock
new file mode 100644
index 0000000..bedf71a
--- /dev/null
+++ b/gemfiles/ruby_head.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (>= 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (>= 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/style.gemfile b/gemfiles/style.gemfile
new file mode 100644
index 0000000..f75762c
--- /dev/null
+++ b/gemfiles/style.gemfile
@@ -0,0 +1,10 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", "~> 0.2"
+gem "stringio", "~> 3.0"
+
+gemspec path: "../"
+
+eval_gemfile("modular/style.gemfile")
diff --git a/gemfiles/style.gemfile.lock b/gemfiles/style.gemfile.lock
new file mode 100644
index 0000000..507ad0e
--- /dev/null
+++ b/gemfiles/style.gemfile.lock
@@ -0,0 +1,128 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.2)
+    benchmark (0.4.0)
+    diff-lcs (1.6.0)
+    diffy (3.4.3)
+    json (2.10.1)
+    language_server-protocol (3.17.0.4)
+    lint_roller (1.1.0)
+    mutex_m (0.3.0)
+    parallel (1.26.3)
+    parser (3.3.7.1)
+      ast (~> 2.4.1)
+      racc
+    racc (1.8.1)
+    rainbow (3.1.1)
+    rake (13.2.1)
+    regexp_parser (2.10.0)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    rubocop (1.71.2)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.38.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.38.0)
+      parser (>= 3.3.1.0)
+    rubocop-gradual (0.3.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      diffy (~> 3.0)
+      parallel (~> 1.10)
+      rainbow (>= 2.2.2, < 4.0)
+      rubocop (~> 1.0)
+    rubocop-lts (8.1.1)
+      rubocop-ruby2_2 (>= 2.0.3, < 3)
+      standard-rubocop-lts (>= 1.0.3, < 3)
+      version_gem (>= 1.1.2, < 3)
+    rubocop-md (1.2.4)
+      rubocop (>= 1.45)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.23.1)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+    rubocop-rake (0.6.0)
+      rubocop (~> 1.0)
+    rubocop-rspec (3.4.0)
+      rubocop (~> 1.61)
+    rubocop-ruby2_2 (2.0.5)
+      rubocop-gradual (~> 0.3, >= 0.3.1)
+      rubocop-md (~> 1.2)
+      rubocop-rake (~> 0.6)
+      rubocop-shopify (~> 2.14)
+      rubocop-thread_safety (~> 0.5, >= 0.5.1)
+      standard-rubocop-lts (~> 1.0, >= 1.0.7)
+      version_gem (>= 1.1.3, < 3)
+    rubocop-shopify (2.15.1)
+      rubocop (~> 1.51)
+    rubocop-thread_safety (0.6.0)
+      rubocop (>= 1.48.1)
+    ruby-progressbar (1.13.0)
+    standard (1.45.0)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.0)
+      rubocop (~> 1.71.0)
+      standard-custom (~> 1.0.0)
+      standard-performance (~> 1.6)
+    standard-custom (1.0.2)
+      lint_roller (~> 1.0)
+      rubocop (~> 1.50)
+    standard-performance (1.6.0)
+      lint_roller (~> 1.1)
+      rubocop-performance (~> 1.23.0)
+    standard-rubocop-lts (1.0.10)
+      rspec-block_is_expected (~> 1.0, >= 1.0.5)
+      standard (>= 1.35.1, < 2)
+      standard-custom (>= 1.0.2, < 2)
+      standard-performance (>= 1.3.1, < 2)
+      version_gem (>= 1.1.4, < 3)
+    stringio (3.1.5)
+    unicode-display_width (3.1.4)
+      unicode-emoji (~> 4.0, >= 4.0.4)
+    unicode-emoji (4.0.4)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  benchmark (~> 0.4)
+  gem_checksums!
+  mutex_m (~> 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  rubocop-lts (~> 8.1, >= 8.1.1)
+  rubocop-packaging (~> 0.5, >= 0.5.2)
+  rubocop-rspec (~> 3.2)
+  standard (>= 1.35.1, != 1.42.0, != 1.41.1)
+  stringio (~> 3.0)
+
+BUNDLED WITH
+   2.4.22
diff --git a/gemfiles/truffleruby_head.gemfile b/gemfiles/truffleruby_head.gemfile
new file mode 100644
index 0000000..49b0671
--- /dev/null
+++ b/gemfiles/truffleruby_head.gemfile
@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mutex_m", ">= 0.2"
+gem "stringio", ">= 3.0"
+
+gemspec path: "../"
diff --git a/gemfiles/truffleruby_head.gemfile.lock b/gemfiles/truffleruby_head.gemfile.lock
new file mode 100644
index 0000000..bedf71a
--- /dev/null
+++ b/gemfiles/truffleruby_head.gemfile.lock
@@ -0,0 +1,43 @@
+PATH
+  remote: ..
+  specs:
+    gem_checksums (1.0.0)
+      version_gem (>= 1.1.5, < 3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.6.0)
+    mutex_m (0.3.0)
+    rake (13.2.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-block_is_expected (1.0.6)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    stringio (3.1.5)
+    version_gem (1.1.5)
+
+PLATFORMS
+  arm64-darwin-24
+  ruby
+
+DEPENDENCIES
+  gem_checksums!
+  mutex_m (>= 0.2)
+  rake (~> 13.0)
+  rspec (~> 3.13)
+  rspec-block_is_expected (~> 1.0)
+  stringio (>= 3.0)
+
+BUNDLED WITH
+   2.4.22