From bc597571fe54f271c320e5856dc51ee71ecb44ec Mon Sep 17 00:00:00 2001
From: Alex Fournier <afournier@nvidia.com>
Date: Mon, 27 Jul 2026 08:14:50 -0700
Subject: [PATCH] perf(relay): bypass inactive execution adapters

Signed-off-by: Alex Fournier <afournier@nvidia.com>
---
 agent/relay_runtime.py                        |  7 +++-
 .../test_relay_shared_metrics_runtime.py      | 41 +++++++++++++++++++
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/agent/relay_runtime.py b/agent/relay_runtime.py
index f7df8eeabe8f..8cf2d72c46d7 100644
--- a/agent/relay_runtime.py
+++ b/agent/relay_runtime.py
@@ -794,9 +794,14 @@ def resolve_execution_context(
     ):
         session = turn.lease.session
         return turn.lease.host, session, turn.handle or session.handle
-    runtime = get_runtime()
+    # Managed-execution consumers create and retain the profile host before
+    # reaching an out-of-turn adapter. Do not initialize Relay for the default
+    # no-consumer path.
+    runtime = get_runtime(create=False)
     if runtime is None:
         return None, None, None
+    if not runtime.managed_execution_enabled():
+        return None, None, None
     session = runtime.get_session(session_id)
     if session is None:
         session = runtime.ensure_session({"session_id": session_id})
diff --git a/tests/hermes_cli/test_relay_shared_metrics_runtime.py b/tests/hermes_cli/test_relay_shared_metrics_runtime.py
index 9444ae411ba0..20966f6bd5a5 100644
--- a/tests/hermes_cli/test_relay_shared_metrics_runtime.py
+++ b/tests/hermes_cli/test_relay_shared_metrics_runtime.py
@@ -521,6 +521,47 @@ def test_tool_intercept_bypass_does_not_create_relay_host(monkeypatch):
     assert imports == []
 
 
+def test_execution_adapters_do_not_create_relay_host_without_a_consumer(
+    monkeypatch,
+):
+    from agent import relay_llm, relay_tools
+
+    relay_runtime._reset_for_tests()
+    imports = []
+
+    def load_relay():
+        imports.append("nemo_relay")
+        raise AssertionError("disabled execution adapter created Relay host")
+
+    monkeypatch.setattr(relay_runtime, "_load_nemo_relay", load_relay)
+    request = {"model": "test-model", "messages": []}
+    response = object()
+    tool_args = {"command": "true"}
+    tool_result = object()
+
+    assert (
+        relay_llm.execute(
+            request,
+            lambda observed: response if observed is request else None,
+            session_id="llm-session",
+            name="test-provider",
+            model_name="test-model",
+        )
+        is response
+    )
+    result, observed_args = relay_tools.execute(
+        "terminal",
+        tool_args,
+        lambda observed: tool_result if observed is tool_args else None,
+        session_id="tool-session",
+    )
+
+    assert result is tool_result
+    assert observed_args is tool_args
+    assert relay_runtime.get_host(create=False) is None
+    assert imports == []
+
+
 def test_profile_key_caches_absolute_path_resolution(monkeypatch):
     relay_runtime._reset_for_tests()