From ed4d70d379d0ee9d2686c935108f9d48510191c1 Mon Sep 17 00:00:00 2001
From: Spencer Judge <spencer@temporal.io>
Date: Thu, 18 Jun 2026 16:54:58 -0700
Subject: [PATCH] Add runtime type information to worker heartbeats

---
 temporal/api/worker/v1/message.proto | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/temporal/api/worker/v1/message.proto b/temporal/api/worker/v1/message.proto
index a87142c78..875ce9e1d 100644
--- a/temporal/api/worker/v1/message.proto
+++ b/temporal/api/worker/v1/message.proto
@@ -130,6 +130,10 @@ message WorkerHeartbeat {
 
   // Storage drivers in use by this SDK.
   repeated StorageDriverInfo drivers = 24;
+
+  // Runtime environments in use by this SDK. Often will only be one of these, but it's allowed to
+  // be repeated for scenarios like "Python inside a Lambda".
+  repeated RuntimeInfo runtimes = 25;
 }
 
 // Detailed worker information.
@@ -194,6 +198,25 @@ message StorageDriverInfo {
   string type = 1;
 }
 
+message RuntimeInfo {
+  enum RuntimeType {
+    RUNTIME_TYPE_UNSPECIFIED = 0;
+    RUNTIME_TYPE_JVM = 1;
+    RUNTIME_TYPE_PYTHON = 2;
+    RUNTIME_TYPE_NODE = 3;
+    RUNTIME_TYPE_BUN = 4;
+    RUNTIME_TYPE_RUBY = 5;
+    RUNTIME_TYPE_GO = 6;
+    RUNTIME_TYPE_DOCKER = 7;
+    RUNTIME_TYPE_LAMBDA = 8;
+    RUNTIME_TYPE_GCR = 9;
+  }
+  // The type of the runtime.
+  RuntimeType type = 1;
+  // The version of the runtime.
+  string version = 2;
+}
+
 // A command sent from the server to a worker.
 message WorkerCommand {
   oneof type {