diff --git a/google-cloud-clients/google-cloud-asset/synth.metadata b/google-cloud-clients/google-cloud-asset/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-asset/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-automl/synth.metadata b/google-cloud-clients/google-cloud-automl/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-automl/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-bigquerydatatransfer/synth.metadata b/google-cloud-clients/google-cloud-bigquerydatatransfer/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-bigquerydatatransfer/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-bigquerystorage/synth.metadata b/google-cloud-clients/google-cloud-bigquerystorage/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-bigquerystorage/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-bigtable-admin/synth.metadata b/google-cloud-clients/google-cloud-bigtable-admin/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-bigtable-admin/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-bigtable/synth.metadata b/google-cloud-clients/google-cloud-bigtable/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-bigtable/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-compute/synth.metadata b/google-cloud-clients/google-cloud-compute/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-compute/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-containeranalysis/synth.metadata b/google-cloud-clients/google-cloud-containeranalysis/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-containeranalysis/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-dataproc/synth.metadata b/google-cloud-clients/google-cloud-dataproc/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-dataproc/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-datastore/synth.metadata b/google-cloud-clients/google-cloud-datastore/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-datastore/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-dialogflow/synth.metadata b/google-cloud-clients/google-cloud-dialogflow/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-dialogflow/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-dlp/synth.metadata b/google-cloud-clients/google-cloud-dlp/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-dlp/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-errorreporting/synth.metadata b/google-cloud-clients/google-cloud-errorreporting/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-errorreporting/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-firestore/synth.metadata b/google-cloud-clients/google-cloud-firestore/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-firestore/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-iot/synth.metadata b/google-cloud-clients/google-cloud-iot/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-iot/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-kms/synth.metadata b/google-cloud-clients/google-cloud-kms/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-kms/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-language/synth.metadata b/google-cloud-clients/google-cloud-language/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-language/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-logging/synth.metadata b/google-cloud-clients/google-cloud-logging/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-logging/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-os-login/synth.metadata b/google-cloud-clients/google-cloud-os-login/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-os-login/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-redis/synth.metadata b/google-cloud-clients/google-cloud-redis/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-redis/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-scheduler/synth.metadata b/google-cloud-clients/google-cloud-scheduler/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-scheduler/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-securitycenter/synth.metadata b/google-cloud-clients/google-cloud-securitycenter/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-securitycenter/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-spanner/synth.metadata b/google-cloud-clients/google-cloud-spanner/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-spanner/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-speech/synth.metadata b/google-cloud-clients/google-cloud-speech/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-speech/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-tasks/synth.metadata b/google-cloud-clients/google-cloud-tasks/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-tasks/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-texttospeech/synth.metadata b/google-cloud-clients/google-cloud-texttospeech/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-texttospeech/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-trace/synth.metadata b/google-cloud-clients/google-cloud-trace/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-trace/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-video-intelligence/synth.metadata b/google-cloud-clients/google-cloud-video-intelligence/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-video-intelligence/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}
diff --git a/google-cloud-clients/google-cloud-websecurityscanner/synth.metadata b/google-cloud-clients/google-cloud-websecurityscanner/synth.metadata
new file mode 100644
index 000000000000..2bd4f07a69a5
--- /dev/null
+++ b/google-cloud-clients/google-cloud-websecurityscanner/synth.metadata
@@ -0,0 +1,27 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": "googleapis",
+        "remote": "https://github.com/googleapis/googleapis.git",
+        "sha": "5a57f0c13a358b2b15452bf2d67453774a5f6d4f",
+        "internalRef": "221837528"
+      }
+    },
+    {
+      "git": {
+        "name": "googleapis-private",
+        "remote": "https://github.com/googleapis/googleapis-private.git",
+        "sha": "6aa8e1a447bb8d0367150356a28cb4d3f2332641",
+        "internalRef": "221340946"
+      }
+    },
+    {
+      "generator": {
+        "name": "artman",
+        "version": "0.16.0",
+        "dockerImage": "googleapis/artman@sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b"
+      }
+    }
+  ]
+}