From 955089d94e963b1d4b248b577b04d10936ab88ad Mon Sep 17 00:00:00 2001
From: Fred Tzeng <fred.tzeng@temporal.io>
Date: Thu, 4 Jun 2026 11:50:30 -0700
Subject: [PATCH] add start_delay to ActivityExecutionInfo

---
 openapi/openapiv2.json                 | 4 ++++
 openapi/openapiv3.yaml                 | 4 ++++
 temporal/api/activity/v1/message.proto | 3 +++
 3 files changed, 11 insertions(+)

diff --git a/openapi/openapiv2.json b/openapi/openapiv2.json
index 316854a1a..ef36ebd55 100644
--- a/openapi/openapiv2.json
+++ b/openapi/openapiv2.json
@@ -13358,6 +13358,10 @@
         "sdkVersion": {
           "type": "string",
           "description": "The version of the SDK of the worker that most recently picked up an attempt of this activity.\nOverwritten on each new attempt. Empty if unknown."
+        },
+        "startDelay": {
+          "type": "string",
+          "description": "Time to wait before dispatching the first activity task. This delay is not applied to retry attempts."
         }
       },
       "description": "Information about a standalone activity."
diff --git a/openapi/openapiv3.yaml b/openapi/openapiv3.yaml
index 845ee0704..e7d691117 100644
--- a/openapi/openapiv3.yaml
+++ b/openapi/openapiv3.yaml
@@ -9770,6 +9770,10 @@ components:
           description: |-
             The version of the SDK of the worker that most recently picked up an attempt of this activity.
              Overwritten on each new attempt. Empty if unknown.
+        startDelay:
+          pattern: ^-?(?:0|[1-9][0-9]{0,11})(?:\.[0-9]{1,9})?s$
+          type: string
+          description: Time to wait before dispatching the first activity task. This delay is not applied to retry attempts.
       description: Information about a standalone activity.
     ActivityExecutionListInfo:
       type: object
diff --git a/temporal/api/activity/v1/message.proto b/temporal/api/activity/v1/message.proto
index 076240492..01f058576 100644
--- a/temporal/api/activity/v1/message.proto
+++ b/temporal/api/activity/v1/message.proto
@@ -178,6 +178,9 @@ message ActivityExecutionInfo {
     // The version of the SDK of the worker that most recently picked up an attempt of this activity.
     // Overwritten on each new attempt. Empty if unknown.
     string sdk_version = 36;
+
+    // Time to wait before dispatching the first activity task. This delay is not applied to retry attempts.
+    google.protobuf.Duration start_delay = 37;
 }
 
 // Limited activity information returned in the list response.