From 18c74d53995b172e9d338975109b8720e0cc0ab4 Mon Sep 17 00:00:00 2001
From: Alex Mazzeo <alex.mazzeo@temporal.io>
Date: Tue, 10 Feb 2026 10:27:43 -0800
Subject: [PATCH] reserve field tag 7 in
 temporal.api.workflowservice.v1.PollWorkflowTaskQueueRequest and
 temporal.api.workflowservice.v1.PollActivityTaskQueueRequest. Move
 worker_instance_key to tag 8 in those messages. Add buf ignore to allow the
 name worker_instance_key to be retagged.

---
 buf.yaml                                             |  2 ++
 .../api/workflowservice/v1/request_response.proto    | 12 ++++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/buf.yaml b/buf.yaml
index 51534eb8f..7a8f9df36 100644
--- a/buf.yaml
+++ b/buf.yaml
@@ -16,6 +16,8 @@ breaking:
     - temporal/api/enums/v1/failed_cause.proto
     # TODO: remove this once the changes with WorkflowExecutionExtendedInfo.pause_info is merged
     - temporal/api/workflow/v1/message.proto
+    # TODO (amazzeo): remove this once worker_instance_key has successfully been retagged in PollWorkflowTaskQueueRequest and PollActivityTaskQueueRequest
+    - temporal/api/workflowservice/v1/request_response.proto
 lint:
   use:
     - DEFAULT
diff --git a/temporal/api/workflowservice/v1/request_response.proto b/temporal/api/workflowservice/v1/request_response.proto
index d6658dd2b..4bf3272c6 100644
--- a/temporal/api/workflowservice/v1/request_response.proto
+++ b/temporal/api/workflowservice/v1/request_response.proto
@@ -261,7 +261,7 @@ message PollWorkflowTaskQueueRequest {
     string identity = 3;
     // A unique key for this worker instance, used for tracking worker lifecycle.
     // This is guaranteed to be unique, whereas identity is not guaranteed to be unique.
-    string worker_instance_key = 7;
+    string worker_instance_key = 8;
     // Deprecated. Use deployment_options instead.
     // Each worker process should provide an ID unique to the specific set of code it is running
     // "checksum" in this field name isn't very accurate, it should be though of as an id.
@@ -273,6 +273,10 @@ message PollWorkflowTaskQueueRequest {
     // Worker deployment options that user has set in the worker.
     // Experimental. Worker Deployments are experimental and might significantly change in the future.
     temporal.api.deployment.v1.WorkerDeploymentOptions deployment_options = 6;
+
+    // Removed in 1.55.0; was temporal.api.worker.v1.WorkerHeartbeat worker_heartbeat
+    reserved 7; 
+    reserved "worker_heartbeat";
 }
 
 message PollWorkflowTaskQueueResponse {
@@ -439,7 +443,7 @@ message PollActivityTaskQueueRequest {
     string identity = 3;
     // A unique key for this worker instance, used for tracking worker lifecycle.
     // This is guaranteed to be unique, whereas identity is not guaranteed to be unique.
-    string worker_instance_key = 7;
+    string worker_instance_key = 8;
     temporal.api.taskqueue.v1.TaskQueueMetadata task_queue_metadata = 4;
     // Information about this worker's build identifier and if it is choosing to use the versioning
     // feature. See the `WorkerVersionCapabilities` docstring for more.
@@ -447,6 +451,10 @@ message PollActivityTaskQueueRequest {
     temporal.api.common.v1.WorkerVersionCapabilities worker_version_capabilities = 5 [deprecated = true];
     // Worker deployment options that user has set in the worker.
     temporal.api.deployment.v1.WorkerDeploymentOptions deployment_options = 6;
+
+    // Removed in 1.55.0; was temporal.api.worker.v1.WorkerHeartbeat worker_heartbeat
+    reserved 7; 
+    reserved "worker_heartbeat";
 }
 
 message PollActivityTaskQueueResponse {