diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c1178ca..e53308c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,48 @@ on:
   pull_request:
 
 jobs:
-  call-workflow-from-shared-config:
-    uses: rubyatscale/shared-config/.github/workflows/ci.yml@main
-    secrets: inherit
+  rspec:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - 3.2
+          - 3.3
+          - 3.4
+          - 4.0
+    name: "RSpec tests: Ruby ${{ matrix.ruby }}"
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Ruby ${{ matrix.ruby }}
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          ruby-version: ${{ matrix.ruby }}
+      - name: Run tests
+        run: bundle exec rspec
+  static_type_check:
+    name: "Type Check"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          ruby-version: 3.3
+      - name: Run static type checks
+        run: bundle exec srb tc
+  notify_on_failure:
+    runs-on: ubuntu-latest
+    needs: [rspec, static_type_check]
+    if: ${{ failure() && github.ref == 'refs/heads/main' }}
+    steps:
+      - uses: slackapi/slack-github-action@v2.1.0
+        with:
+          webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
+          webhook-type: incoming-webhook
+          payload: |
+            {
+              "text": "${{ github.repository }}/${{ github.ref }}: FAILED\n${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            }
diff --git a/Gemfile.lock b/Gemfile.lock
index a8506a9..7c5ae3a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,106 +1,137 @@
 PATH
   remote: .
   specs:
-    packs-specification (0.0.10)
+    packs-specification (0.0.11)
       sorbet-runtime
 
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.4.2)
-    coderay (1.1.3)
-    diff-lcs (1.5.0)
-    json (2.7.2)
-    language_server-protocol (3.17.0.3)
-    method_source (1.0.0)
+    ast (2.4.3)
+    benchmark (0.5.0)
+    date (3.5.1)
+    debug (1.11.1)
+      irb (~> 1.10)
+      reline (>= 0.3.8)
+    diff-lcs (1.6.2)
+    erb (6.0.1)
+    erubi (1.13.1)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.18.1)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
     netrc (0.11.0)
-    parallel (1.24.0)
-    parser (3.3.1.0)
+    parallel (1.27.0)
+    parser (3.3.10.1)
       ast (~> 2.4.1)
       racc
-    pry (0.14.1)
-      coderay (~> 1.1)
-      method_source (~> 1.0)
-    racc (1.7.3)
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
+    prism (1.9.0)
+    psych (5.3.1)
+      date
+      stringio
+    racc (1.8.1)
     rainbow (3.1.1)
-    rake (13.0.6)
-    rbi (0.0.16)
-      ast
-      parser (>= 2.6.4.0)
-      sorbet-runtime (>= 0.5.9204)
-      unparser
-    regexp_parser (2.9.1)
-    rexml (3.2.6)
-    rspec (3.11.0)
-      rspec-core (~> 3.11.0)
-      rspec-expectations (~> 3.11.0)
-      rspec-mocks (~> 3.11.0)
-    rspec-core (3.11.0)
-      rspec-support (~> 3.11.0)
-    rspec-expectations (3.11.1)
+    rake (13.3.1)
+    rbi (0.3.9)
+      prism (~> 1.0)
+      rbs (>= 3.4.4)
+    rbs (4.0.0.dev.5)
+      logger
+      prism (>= 1.3.0)
+      tsort
+    rdoc (7.1.0)
+      erb
+      psych (>= 4.0.0)
+      tsort
+    regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
+    require-hooks (0.2.3)
+    rexml (3.4.4)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-mocks (3.11.1)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.7)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-support (3.11.1)
-    rubocop (1.63.5)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.7)
+    rubocop (1.84.1)
       json (~> 2.3)
-      language_server-protocol (>= 3.17.0)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
       parallel (~> 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.31.1, < 2.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.49.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.31.3)
-      parser (>= 3.3.1.0)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.49.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.7)
     ruby-progressbar (1.13.0)
-    sorbet (0.5.11370)
-      sorbet-static (= 0.5.11370)
-    sorbet-runtime (0.5.11370)
-    sorbet-static (0.5.11370-universal-darwin)
-    sorbet-static (0.5.11370-x86_64-linux)
-    sorbet-static-and-runtime (0.5.11370)
-      sorbet (= 0.5.11370)
-      sorbet-runtime (= 0.5.11370)
-    spoom (1.1.12)
-      sorbet (>= 0.5.9204)
-      sorbet-runtime (>= 0.5.9204)
+    sorbet (0.6.12913)
+      sorbet-static (= 0.6.12913)
+    sorbet-runtime (0.6.12913)
+    sorbet-static (0.6.12913-universal-darwin)
+    sorbet-static (0.6.12913-x86_64-linux)
+    sorbet-static-and-runtime (0.6.12913)
+      sorbet (= 0.6.12913)
+      sorbet-runtime (= 0.6.12913)
+    spoom (1.7.11)
+      erubi (>= 1.10.0)
+      prism (>= 0.28.0)
+      rbi (>= 0.3.3)
+      rbs (>= 4.0.0.dev.4)
+      rexml (>= 3.2.6)
+      sorbet-static-and-runtime (>= 0.5.10187)
       thor (>= 0.19.2)
-    tapioca (0.10.2)
-      bundler (>= 1.17.3)
+    stringio (3.2.0)
+    tapioca (0.17.10)
+      benchmark
+      bundler (>= 2.2.25)
       netrc (>= 0.11.0)
       parallel (>= 1.21.0)
-      pry (>= 0.12.2)
-      rbi (~> 0.0.0, >= 0.0.14)
-      sorbet-static-and-runtime (>= 0.5.9204)
-      spoom (~> 1.1.0, >= 1.1.11)
+      rbi (>= 0.3.7)
+      require-hooks (>= 0.2.2)
+      sorbet-static-and-runtime (>= 0.5.11087)
+      spoom (>= 1.7.9)
       thor (>= 1.2.0)
       yard-sorbet
-    thor (1.2.1)
-    unicode-display_width (2.5.0)
-    unparser (0.6.5)
-      diff-lcs (~> 1.3)
-      parser (>= 3.1.0)
-    webrick (1.7.0)
-    yard (0.9.28)
-      webrick (~> 1.7.0)
-    yard-sorbet (0.7.0)
-      sorbet-runtime (>= 0.5)
-      yard (>= 0.9)
+    thor (1.5.0)
+    tsort (0.2.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    yard (0.9.38)
+    yard-sorbet (0.9.0)
+      sorbet-runtime
+      yard
 
 PLATFORMS
   universal-darwin
   x86_64-linux
 
 DEPENDENCIES
-  bundler (~> 2.2.16)
+  bundler
+  debug
   packs-specification!
   rake
-  rspec (~> 3.0)
+  rspec
   rubocop
   sorbet
   tapioca
diff --git a/bin/console b/bin/console
new file mode 100755
index 0000000..4c1fcd0
--- /dev/null
+++ b/bin/console
@@ -0,0 +1,8 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'bundler/setup'
+require 'packs-specification'
+require 'irb'
+
+IRB.start(__FILE__)
diff --git a/lib/packs/pack.rb b/lib/packs/pack.rb
index 32f0f51..d0d45ee 100644
--- a/lib/packs/pack.rb
+++ b/lib/packs/pack.rb
@@ -1,17 +1,29 @@
 # typed: strict
 
 module Packs
-  class Pack < T::Struct
+  class Pack
     extend T::Sig
 
-    const :name, String
-    const :path, Pathname
-    const :relative_path, Pathname
-    const :raw_hash, T::Hash[T.untyped, T.untyped]
+    sig { returns(String) }
+    attr_reader :name
+
+    sig { returns(Pathname) }
+    attr_reader :path
+
+    sig { returns(Pathname) }
+    attr_reader :relative_path
+
+    sig { params(name: String, path: Pathname, relative_path: Pathname).void }
+    def initialize(name:, path:, relative_path:)
+      @name = name
+      @path = path
+      @relative_path = relative_path
+      @raw_hash = T.let(nil, T.nilable(T::Hash[T.untyped, T.untyped]))
+      @is_gem = T.let(nil, T.nilable(T::Boolean))
+    end
 
     sig { params(package_yml_absolute_path: Pathname).returns(Pack) }
     def self.from(package_yml_absolute_path)
-      package_loaded_yml = YAML.load_file(package_yml_absolute_path)
       path = package_yml_absolute_path.dirname
       relative_path = path.relative_path_from(Specification.root)
       package_name = relative_path.cleanpath.to_s
@@ -19,11 +31,15 @@ def self.from(package_yml_absolute_path)
       Pack.new(
         name: package_name,
         path: path,
-        relative_path: relative_path,
-        raw_hash: package_loaded_yml || {}
+        relative_path: relative_path
       )
     end
 
+    sig { returns(T::Hash[T.untyped, T.untyped]) }
+    def raw_hash
+      @raw_hash ||= YAML.load_file(yml(relative: false)) || {}
+    end
+
     sig { params(relative: T::Boolean).returns(Pathname) }
     def yml(relative: true)
       path_to_use = relative ? relative_path : path
@@ -37,12 +53,25 @@ def last_name
 
     sig { returns(T::Boolean) }
     def is_gem? # rubocop:disable Naming/PredicateName
-      @is_gem ||= T.let(relative_path.glob('*.gemspec').any?, T.nilable(T::Boolean))
+      @is_gem ||= relative_path.glob('*.gemspec').any?
     end
 
     sig { returns(T::Hash[T.untyped, T.untyped]) }
     def metadata
       raw_hash['metadata'] || {}
     end
+
+    sig { returns(T::Array[Symbol]) }
+    private def instance_variables_to_inspect = [:@name]
+
+    if RUBY_VERSION < '4'
+      sig { returns(String) }
+      def inspect
+        ivars = instance_variables_to_inspect.map do |ivar|
+          "#{ivar}=#{instance_variable_get(ivar).inspect}"
+        end.join(', ')
+        "#<#{self.class.name}:0x#{object_id.to_s(16)} #{ivars}>"
+      end
+    end
   end
 end
diff --git a/lib/packs/rspec/support.rb b/lib/packs/rspec/support.rb
index 83ca665..4675f06 100644
--- a/lib/packs/rspec/support.rb
+++ b/lib/packs/rspec/support.rb
@@ -1,3 +1,5 @@
+require 'fileutils'
+require 'tmpdir'
 require_relative 'fixture_helper'
 
 RSpec.configure do |config|
diff --git a/packs-specification.gemspec b/packs-specification.gemspec
index e3b8c66..eb09a09 100644
--- a/packs-specification.gemspec
+++ b/packs-specification.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new do |spec|
   spec.name          = 'packs-specification'
-  spec.version       = '0.0.10'
+  spec.version       = '0.0.11'
   spec.authors       = ['Gusto Engineers']
   spec.email         = ['dev@gusto.com']
   spec.summary       = 'The specification for packs in the `rubyatscale` ecosystem.'
@@ -21,13 +21,14 @@ Gem::Specification.new do |spec|
   # Specify which files should be added to the gem when it is released.
   spec.files = Dir['README.md', 'lib/**/*']
   spec.require_paths = ['lib']
-  spec.required_ruby_version = '>= 2.6'
+  spec.required_ruby_version = '>= 3.1'
 
   spec.add_dependency 'sorbet-runtime'
 
-  spec.add_development_dependency 'bundler', '~> 2.2.16'
+  spec.add_development_dependency 'bundler'
+  spec.add_development_dependency 'debug'
   spec.add_development_dependency 'rake'
-  spec.add_development_dependency 'rspec', '~> 3.0'
+  spec.add_development_dependency 'rspec'
   spec.add_development_dependency 'rubocop'
   spec.add_development_dependency 'sorbet'
   spec.add_development_dependency 'tapioca'
diff --git a/spec/packs/pack_spec.rb b/spec/packs/pack_spec.rb
index e1403e2..670b12d 100644
--- a/spec/packs/pack_spec.rb
+++ b/spec/packs/pack_spec.rb
@@ -44,6 +44,65 @@
     end
   end
 
+  describe 'lazy loading' do
+    before do
+      write_file('packs/my_pack/package.yml', <<~CONTENTS)
+        enforce_privacy: true
+        metadata:
+          owner: MyTeam
+      CONTENTS
+    end
+
+    let(:pack) { Packs::Pack.from(Pathname.pwd.join('packs/my_pack/package.yml')) }
+
+    it 'does not load raw_hash until accessed' do
+      expect(pack.instance_variable_get(:@raw_hash)).to be_nil
+    end
+
+    it 'loads raw_hash when accessed' do
+      pack.raw_hash
+      expect(pack.instance_variable_get(:@raw_hash)).to eq({ 'enforce_privacy' => true, 'metadata' => { 'owner' => 'MyTeam' } })
+    end
+
+    it 'loads raw_hash when metadata is accessed' do
+      pack.metadata
+      expect(pack.instance_variable_get(:@raw_hash)).not_to be_nil
+    end
+  end
+
+  describe '#inspect' do
+    before do
+      write_file('packs/my_pack/package.yml', <<~CONTENTS)
+        enforce_privacy: true
+      CONTENTS
+    end
+
+    let(:pack) { Packs::Pack.from(Pathname.pwd.join('packs/my_pack/package.yml')) }
+
+    it 'only includes @name in inspect output' do
+      expect(pack.inspect).to match(/^#<Packs::Pack:0x[0-9a-f]+ @name="packs\/my_pack">$/)
+    end
+
+    it 'does not include other instance variables in inspect output' do
+      expect(pack.inspect).not_to include('@path')
+      expect(pack.inspect).not_to include('@relative_path')
+      expect(pack.inspect).not_to include('@raw_hash')
+    end
+  end
+
+  describe '#instance_variables_to_inspect', if: RUBY_VERSION >= '4' do
+    before do
+      write_file('packs/my_pack/package.yml')
+    end
+
+    let(:pack) { Packs::Pack.from(Pathname.pwd.join('packs/my_pack/package.yml')) }
+
+    it 'is respected by Kernel#inspect' do
+      expect(pack.inspect).to include('@name=')
+      expect(pack.inspect).not_to include('@path=')
+    end
+  end
+
   describe '.is_gem?' do
     let(:subject) { Packs.find('packs/my_pack').is_gem? }
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index c84a863..f67044a 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -2,7 +2,7 @@
 
 require 'bundler/setup'
 require 'packs-specification'
-require 'pry'
+require 'debug'
 
 require 'packs/rspec/support'