diff --git a/.github/workflows/autoapprove.yml b/.github/workflows/autoapprove.yml
new file mode 100644
index 000000000..f6422beb2
--- /dev/null
+++ b/.github/workflows/autoapprove.yml
@@ -0,0 +1,49 @@
+name: AutoApprove
+
+on:
+  pull_request:
+    branches:
+      - master
+    types:
+      - opened
+
+jobs:
+  auto-approve:
+    runs-on: ubuntu-latest
+    if: contains(github.head_ref, 'autosynth')
+    env:
+      ENABLE_AUTO_APPROVE: ${{ secrets.ENABLE_AUTO_APPROVE }}
+    steps:
+      - name: AutoApprove
+        uses: actions/github-script@v2
+        with:
+          github-token: ${{secrets.YOSHI_APPROVER_TOKEN}}
+          script: |
+            if (context.payload.sender.login != "yoshi-automation") {
+              core.error("AutoApprove: Not running for this sender.");
+              return;
+            }
+            if (!context.payload.pull_request.title.startsWith("feat: Automated ")) {
+              core.error("AutoApprove: Not running for this PR title.");
+              return;
+            }
+            if (!process.env.ENABLE_AUTO_APPROVE) {
+              core.error("AutoApprove: PR conditions passed but ENABLE_AUTO_APPROVE is not set.");
+              return;
+            }
+            core.info("AutoApprove: PR conditions passed!");
+            await github.pulls.createReview({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: "AutoApprove: Rubber stamped client regeneration!",
+              pull_number: context.payload.pull_request.number,
+              event: "APPROVE"
+            });
+            core.info("AutoApprove: Rubber stamped client regeneration!");
+            await github.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.payload.pull_request.number,
+              labels: ["automerge"]
+            });
+            core.info("AutoApprove: Applied automerge label!");
diff --git a/google-api-client.gemspec b/google-api-client.gemspec
index 7b0e7bd0c..4b2b2eb36 100644
--- a/google-api-client.gemspec
+++ b/google-api-client.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
 
   spec.files         = `git ls-files -z`
                        .split("\x0")
-                       .reject { |f| f.match(%r{^(spec|script)/|^api_names_out}) }
+                       .reject { |f| f.match(%r{^(spec|script)/|^api_names_out|synth\.metadata}) }
 
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = %w[lib generated]