diff --git a/.github/actions/select_gem/action.yml b/.github/actions/select_gem/action.yml
new file mode 100644
index 0000000000..861adfd34a
--- /dev/null
+++ b/.github/actions/select_gem/action.yml
@@ -0,0 +1,59 @@
+name: Select Gems
+description: Selects the Gems
+inputs:
+  token:
+    description: Token used to add labels
+    required: false
+    type: string
+  default:
+    description: Gem string to be used if not able use pr label
+    required: false
+    type: string
+    default: ""
+outputs:
+  gems:
+    description: The gems which have been changed
+    value: ${{steps.select.outputs.gems}}
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - uses: actions/labeler@634933edcd8ababfe52f92936142cc22ac488b1b # v6.0.1
+      name: Calculate Gems
+      if: ${{ github.event_name == 'pull_request' }}
+      id: label
+      with:
+        repo-token: "${{ inputs.token }}"
+        sync-labels: true
+
+    - name: Select Gems
+      id: select
+      shell: bash
+      run: |
+        # Select Gems
+        default="${{ inputs.default }}"
+        deny='["ci", "deprecated"]'
+        labels="${{ steps.label.outputs.all-labels || inputs.default }}"
+        # labels is a comma-separated string, convert to JSON array
+        json=$(printf '%s\n' "$labels" | jq -R 'split(",")')
+
+        # Remove deny-listed items
+        filtered=$(echo "$json" | jq --argjson deny "$deny" '[ .[] | select(. as $l | $deny | index($l) | not) ]')
+
+        # Guarantee valid JSON by adding default
+        if [ -z "$filtered" ] || [ "$filtered" = "null" ] || [ "$(echo "$filtered" | jq 'length')" -eq 0 ]; then
+          filtered=$(jq -n --arg d "$default" '[ $d ]')
+        fi
+
+        {
+          echo "gems<<EOF"
+          echo "$filtered"
+          echo "EOF"
+        } >> "$GITHUB_OUTPUT"
+
+    - shell: bash
+      run: |
+        # Log Gems Selected
+        echo "Gems selected = ${{ steps.select.outputs.gems }}"
diff --git a/.github/renovate.json5 b/.github/renovate.json5
index 22dcd5424a..921c3f42b7 100644
--- a/.github/renovate.json5
+++ b/.github/renovate.json5
@@ -37,6 +37,7 @@
       dependencyDashboardCategory: "Min Ruby Runtime",
       matchDepNames: ["ruby"],
       matchFileNames: [
+        ".github/workflows/ci-build-ruby.yml",
         ".github/workflows/ci-markdown-checks.yml",
         "**/*.gemspec",
       ],
diff --git a/.github/workflows/ci-build-ruby.yml b/.github/workflows/ci-build-ruby.yml
new file mode 100644
index 0000000000..dc7fbb6b5a
--- /dev/null
+++ b/.github/workflows/ci-build-ruby.yml
@@ -0,0 +1,143 @@
+name: Build / Ruby
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths: &path_filters
+      - ".yardopts"
+      - "GEMFILE"
+      - "RAKEFILE"
+      - "**/.yardopts"
+      - "**/GEMFILE"
+      - "**/LICENSE"
+      - "**/RAKEFILE"
+      - "**/*.gemspec"
+      - "**/*.md"
+      - "**/lib/**"
+      - ".github/actions/select_gem/action.yml"
+      - ".github/workflows/ci-buid-ruby.yml"
+  pull_request:
+    branches:
+      - main
+    paths: *path_filters
+  merge_group:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.ref }} # Ensure that only one instance of this workflow is running per event type and ref
+  cancel-in-progress: true # Cancel any previous runs of this workflow for the same event type and ref
+jobs:
+  analyze:
+    if: ${{ github.repository == 'open-telemetry/opentelemetry-ruby-contrib' }}
+    runs-on: ubuntu-24.04
+    outputs:
+      gems: ${{steps.select_gem.outputs.gems}}
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: ./.github/actions/select_gem
+        name: Select Gems
+        id: select_gem
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+          default: "Everything"
+
+  build:
+    runs-on: ubuntu-24.04
+    needs: analyze
+    if: ${{ github.repository == 'open-telemetry/opentelemetry-ruby-contrib' && needs.analyze.outputs.gems != '[]' }}
+    strategy:
+      matrix:
+        gem: ${{ fromJson(needs.analyze.outputs.gems) }}
+      fail-fast: false
+    name: ${{ matrix.gem }}
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - name: Setup
+        if: ${{ matrix.gem != 'Everything' }}
+        id: setup
+        shell: bash
+        run: |
+          # 🛠️ Setup 🛠️
+          dir=$(find . -iname 'opentelemetry-${{ matrix.gem }}.gemspec' -exec dirname {} \;)
+          echo "gem_dir=${dir}" >> $GITHUB_OUTPUT
+      - name: Install Ruby
+        uses: ruby/setup-ruby@e65c17d16e57e481586a6a5a0282698790062f92 # v1.300.0
+        with:
+          ruby-version: "ruby-3.3.11"
+      - name: Compute Gemfile hash
+        id: lockhash
+        shell: bash
+        working-directory: ${{ steps.setup.outputs.gem_dir }}
+        run: |
+          files=$(find . -name "Gemfile" | sort)
+          if [[ -n "$files" ]]; then
+            hash=$(sha256sum $files | sha256sum | cut -d ' ' -f1)
+            echo "hash=$hash" >> $GITHUB_OUTPUT
+          else
+            echo "hash=$(date +'%Y%m%d')" >> $GITHUB_OUTPUT
+          fi
+      - name: Cache Bundler
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 #v5.0.4
+        with:
+          path: |
+            vendor/bundle
+            .bundle
+            ${{ steps.setup.outputs.gem_dir }}/vendor/bundle
+            ${{ steps.setup.outputs.gem_dir }}/.bundle
+          key: bundler-${{ runner.os }}-${{ matrix.gem }}-${{ steps.lockhash.outputs.hash }}
+          restore-keys: |
+            bundler-${{ runner.os }}-${{ matrix.gem }}-
+      - name: Install Tools & Gem Deps
+        run: |
+          # Always install tools
+          bundle config set path vendor/bundle
+          bundle config set clean false
+          bundle install --jobs 4 --retry 3
+
+          # Conditionally install gem deps
+          if [ "${{ matrix.gem }}" == "Everything" ]; then
+            bundle exec rake install
+          fi
+        working-directory: "${{ steps.setup.outputs.gem_dir }}"
+      - name: YARD
+        shell: bash
+        run: |
+          # 📄 Yard Docs 📄
+          bundle exec rake yard
+        working-directory: "${{ steps.setup.outputs.gem_dir }}"
+      - name: Build Gem
+        shell: bash
+        run: |
+          # 📦 Build Gem 📦
+          bundle exec rake build
+        working-directory: "${{ steps.setup.outputs.gem_dir }}"
+
+  verify:
+    runs-on: ubuntu-24.04
+    needs:
+      - analyze
+      - build
+    if: ${{ github.repository == 'open-telemetry/opentelemetry-ruby-contrib' && always() }} # Always run so we can detect failures/skips
+    steps:
+      - name: Count builds
+        run: |
+          if [ "${{ needs.analyze.outputs.gems }}" = "[]" ]; then
+            echo "::error:: ❌ No gems selected — build matrix was empty."
+            exit 1
+          fi
+          gems='${{ needs.analyze.outputs.gems }}'
+          count=$(echo "$gems" | jq 'length')
+          echo "ℹ️ Build count: $count"
+
+      - name: Check build results
+        run: |
+          if [ "${{ needs.build.result }}" = "skipped" ]; then
+            echo "::error:: Build job was skipped — no builds executed."
+            exit 1
+          fi
+          if [ "${{ needs.build.result }}" != "success" ]; then
+            echo "::error:: ❌ One or more builds failed."
+            exit 1
+          fi
+          echo "::notice:: ✅ All builds ran and passed."
diff --git a/Rakefile b/Rakefile
index 460c4237a2..6f5a9c3c76 100644
--- a/Rakefile
+++ b/Rakefile
@@ -28,24 +28,53 @@ namespace :each do
   task :default do
     foreach_gem('bundle exec rake')
   end
+
+  task :build do
+    foreach_gem('bundle exec rake build')
+  end
+
+  task :install do
+    path = File.join(Dir.pwd, "vendor", "bundle")
+    foreach_gem([
+      "bundle config set path #{path}",
+      "bundle config set clean false",
+      "bundle install --jobs 4 --retry 3"
+    ])
+  end
 end
 
 task each: 'each:default'
 
+task build: ['each:build']
+task install: ['each:install']
+task yard: ['each:yard']
+
 task default: [:each]
 
-def foreach_gem(cmd)
-  Dir.glob("**/opentelemetry-*.gemspec") do |gemspec|
+EXCLUDED_DIRS = %w[vendor]
+
+def foreach_gem(cmds)
+  cmds = Array(cmds)  # string → ["string"], array stays array
+  gemspecs =
+    Dir.glob("**/opentelemetry-*.gemspec")
+       .reject do |path|
+         EXCLUDED_DIRS.any? do |d|
+           path.include?("/#{d}/") || path.start_with?("#{d}/")
+         end
+       end
+       .sort
+
+  gemspecs.each do |gemspec|
     name = File.basename(gemspec, ".gemspec")
     dir = File.dirname(gemspec)
     puts "**** Entering #{dir}"
     Dir.chdir(dir) do
       if defined?(Bundler)
-        Bundler.with_clean_env do
-          sh(cmd)
+        Bundler.with_unbundled_env do
+          cmds.each { |cmd| sh(cmd) }
         end
       else
-        sh(cmd)
+        cmds.each { |cmd| sh(cmd) }
       end
     end
   end
diff --git a/sampler/xray/README.md b/sampler/xray/README.md
index c17ebf9d3b..fd3406d725 100644
--- a/sampler/xray/README.md
+++ b/sampler/xray/README.md
@@ -1,4 +1,4 @@
-# opentelemetry-sampler-xray
+# OpenTelemetry::Sampler::XRay
 
 The `opentelemetry-sampler-xray` gem contains the AWS X-Ray Remote Sampler for OpenTelemetry.