diff --git a/google/firestore/admin/v1beta1/firestore_admin.proto b/google/firestore/admin/v1beta1/firestore_admin.proto
index 823bb315..f137fc3f 100644
--- a/google/firestore/admin/v1beta1/firestore_admin.proto
+++ b/google/firestore/admin/v1beta1/firestore_admin.proto
@@ -159,8 +159,8 @@ message CreateIndexRequest {
   // `projects/{project_id}/databases/{database_id}`
   string parent = 1;
 
-  // The index to create. The name and state should not be specified.
-  // Certain single field indexes cannot be created or deleted.
+  // The index to create. The name and state fields are output only and will be
+  // ignored. Certain single field indexes cannot be created or deleted.
   Index index = 2;
 }
 
diff --git a/google/firestore/admin/v1beta1/index.proto b/google/firestore/admin/v1beta1/index.proto
index e777e5b9..2bb826bb 100644
--- a/google/firestore/admin/v1beta1/index.proto
+++ b/google/firestore/admin/v1beta1/index.proto
@@ -82,6 +82,7 @@ message Index {
   }
 
   // The resource name of the index.
+  // Output only.
   string name = 1;
 
   // The collection ID to which this index applies. Required.
@@ -91,7 +92,6 @@ message Index {
   repeated IndexField fields = 3;
 
   // The state of the index.
-  // The state is read-only.
-  // @OutputOnly
+  // Output only.
   State state = 6;
 }
diff --git a/google/firestore/artman_firestore.yaml b/google/firestore/artman_firestore.yaml
index d8c357b2..317465fa 100644
--- a/google/firestore/artman_firestore.yaml
+++ b/google/firestore/artman_firestore.yaml
@@ -36,8 +36,14 @@ artifacts:
   type: GAPIC
   language: NODEJS
 - name: php_gapic
-  type: GAPIC
+  type: GAPIC_ONLY
   language: PHP
+  publish_targets:
+  - name: staging
+    type: GITHUB
+    location: git@github.com:googleapis/api-client-staging.git
+    directory_mappings:
+    - dest: generated/php/google-cloud-firestore-v1beta1
 - name: go_gapic
   type: GAPIC
   language: GO
diff --git a/google/firestore/v1beta1/common.proto b/google/firestore/v1beta1/common.proto
index e6243234..1422c448 100644
--- a/google/firestore/v1beta1/common.proto
+++ b/google/firestore/v1beta1/common.proto
@@ -25,6 +25,7 @@ option java_multiple_files = true;
 option java_outer_classname = "CommonProto";
 option java_package = "com.google.firestore.v1beta1";
 option objc_class_prefix = "GCFS";
+option php_namespace = "Google\\Cloud\\Firestore\\V1beta1";
 
 
 // A set of field paths on a document.
diff --git a/google/firestore/v1beta1/document.proto b/google/firestore/v1beta1/document.proto
index cf6001db..9ba580a3 100644
--- a/google/firestore/v1beta1/document.proto
+++ b/google/firestore/v1beta1/document.proto
@@ -27,6 +27,7 @@ option java_multiple_files = true;
 option java_outer_classname = "DocumentProto";
 option java_package = "com.google.firestore.v1beta1";
 option objc_class_prefix = "GCFS";
+option php_namespace = "Google\\Cloud\\Firestore\\V1beta1";
 
 
 // A Firestore document.
diff --git a/google/firestore/v1beta1/firestore.proto b/google/firestore/v1beta1/firestore.proto
index 624ce6cb..f8707198 100644
--- a/google/firestore/v1beta1/firestore.proto
+++ b/google/firestore/v1beta1/firestore.proto
@@ -31,6 +31,7 @@ option java_multiple_files = true;
 option java_outer_classname = "FirestoreProto";
 option java_package = "com.google.firestore.v1beta1";
 option objc_class_prefix = "GCFS";
+option php_namespace = "Google\\Cloud\\Firestore\\V1beta1";
 
 // Specification of the Firestore API.
 
diff --git a/google/firestore/v1beta1/query.proto b/google/firestore/v1beta1/query.proto
index d19b0222..215a5c29 100644
--- a/google/firestore/v1beta1/query.proto
+++ b/google/firestore/v1beta1/query.proto
@@ -26,6 +26,7 @@ option java_multiple_files = true;
 option java_outer_classname = "QueryProto";
 option java_package = "com.google.firestore.v1beta1";
 option objc_class_prefix = "GCFS";
+option php_namespace = "Google\\Cloud\\Firestore\\V1beta1";
 
 
 // A Firestore query.
diff --git a/google/firestore/v1beta1/write.proto b/google/firestore/v1beta1/write.proto
index 73ec3d9a..02fdb110 100644
--- a/google/firestore/v1beta1/write.proto
+++ b/google/firestore/v1beta1/write.proto
@@ -27,6 +27,7 @@ option java_multiple_files = true;
 option java_outer_classname = "WriteProto";
 option java_package = "com.google.firestore.v1beta1";
 option objc_class_prefix = "GCFS";
+option php_namespace = "Google\\Cloud\\Firestore\\V1beta1";
 
 
 // A write on a document.
@@ -73,7 +74,8 @@ message DocumentTransform {
       // Unspecified. This value must not be used.
       SERVER_VALUE_UNSPECIFIED = 0;
 
-      // The time at which the server processed the request.
+      // The time at which the server processed the request, with millisecond
+      // precision.
       REQUEST_TIME = 1;
     }
 
@@ -93,6 +95,7 @@ message DocumentTransform {
 
   // The list of transformations to apply to the fields of the document, in
   // order.
+  // This must not be empty.
   repeated FieldTransform field_transforms = 2;
 }