fix(runtime): honor NOUS_INFERENCE_BASE_URL across pool/explicit/aux paths

Upstream #52270 added `_nous_inference_env_override()` but wired it into
only `resolve_nous_runtime_credentials`. Three sibling resolution paths
still ignored the override, so a self-hosted Nous inference endpoint set
via `NOUS_INFERENCE_BASE_URL` was silently dropped whenever credentials
arrived through any of them:

- the credential-pool path (`_resolve_runtime_from_pool_entry`)
- the explicit-provider path (`_resolve_explicit_runtime`)
- the auxiliary side-LLM client (`_pool_runtime_base_url`)

Route all three through the same auth-layer reader so every
`NOUS_INFERENCE_BASE_URL` read shares one normalization path
(trailing-slash stripping, blank -> empty) and the documented
trusted-bypass intent stays in one place. The override is live-only: it
wins for the base URL returned this run but is never persisted to
auth.json or the credential pool, so an ephemeral dev/staging value
cannot poison durable auth state.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/agent/test_auxiliary_client.py

@@ -34,6 +34,7 @@ from agent.auxiliary_client import (
     _resolve_task_provider_model,
     _resolve_xai_oauth_for_aux,
     _CodexCompletionsAdapter,
+    _pool_runtime_base_url,
 )
 
 
@@ -4376,6 +4377,18 @@ class TestOpenRouterExplicitApiKey:
             )
 
 
+def test_pool_runtime_base_url_uses_nous_env_override(monkeypatch):
+    entry = SimpleNamespace(
+        provider="nous",
+        runtime_base_url="https://inference-api.nousresearch.com/v1",
+        inference_base_url="https://inference-api.nousresearch.com/v1",
+        base_url="https://inference-api.nousresearch.com/v1",
+    )
+    monkeypatch.setenv("NOUS_INFERENCE_BASE_URL", "https://ai.wildebeest-newton.ts.net/v1")
+
+    assert _pool_runtime_base_url(entry) == "https://ai.wildebeest-newton.ts.net/v1"
+
+
 class TestAnthropicExplicitApiKey:
     """Test that explicit_api_key is correctly propagated to _try_anthropic().
 

tests/hermes_cli/test_auth_nous_provider.py

@@ -217,6 +217,63 @@ def test_resolve_nous_runtime_credentials_prefers_invoke_jwt_and_mirrors(
     assert pool_entries[0]["source"] == auth_mod.NOUS_DEVICE_CODE_SOURCE
 
 
+def test_resolve_nous_runtime_credentials_env_override_wins_live_not_persisted(
+    tmp_path,
+    monkeypatch,
+    shared_store_env,
+):
+    """NOUS_INFERENCE_BASE_URL is a LIVE override, not a persisted one.
+
+    The env override wins for the base_url returned to the caller this run,
+    but durable auth state (auth.json, the credential pool, the shared
+    store) keeps the network-validated URL from the refresh response. This
+    keeps an ephemeral dev/staging override from poisoning auth.json after
+    the env var is later unset.
+    """
+    import hermes_cli.auth as auth_mod
+
+    hermes_home = tmp_path / "hermes"
+    override_url = "https://ai.wildebeest-newton.ts.net/v1"
+    network_url = "https://inference-api.nousresearch.com/v1"
+    refreshed_token = _invoke_jwt(seconds=3600)
+    _setup_nous_auth(
+        hermes_home,
+        access_token=_invoke_jwt(seconds=-60),
+        refresh_token="refresh-old",
+        expires_at=_future_iso(-60),
+        expires_in=0,
+    )
+    monkeypatch.setenv("HERMES_HOME", str(hermes_home))
+    monkeypatch.setenv("NOUS_INFERENCE_BASE_URL", override_url)
+
+    def _fake_refresh_access_token(*, client, portal_base_url, client_id, refresh_token):
+        return {
+            "access_token": refreshed_token,
+            "refresh_token": "refresh-new",
+            "expires_in": 3600,
+            "token_type": "Bearer",
+            "scope": "inference:invoke",
+            "inference_base_url": network_url,
+        }
+
+    monkeypatch.setattr("hermes_cli.auth._refresh_access_token", _fake_refresh_access_token)
+
+    creds = auth_mod.resolve_nous_runtime_credentials()
+
+    # The env override wins for the LIVE returned base_url...
+    assert creds["base_url"] == override_url
+
+    # ...but it is deliberately NOT persisted: every durable store keeps the
+    # network-validated URL, so the ephemeral override can't poison auth.json.
+    payload = json.loads((hermes_home / "auth.json").read_text())
+    assert payload["providers"]["nous"]["inference_base_url"] == network_url
+    assert payload["providers"]["nous"]["inference_base_url"] != override_url
+    assert payload["credential_pool"]["nous"][0]["inference_base_url"] == network_url
+
+    shared_payload = json.loads((shared_store_env / "nous_auth.json").read_text())
+    assert shared_payload["inference_base_url"] == network_url
+
+
 def test_resolve_nous_runtime_credentials_invoke_jwt_is_idempotent(
     tmp_path,
     monkeypatch,

tests/hermes_cli/test_runtime_provider_resolution.py

@@ -1,6 +1,7 @@
 import base64
 import json
 import time
+from types import SimpleNamespace
 
 import pytest
 
@@ -44,6 +45,36 @@ def test_resolve_runtime_provider_uses_credential_pool(monkeypatch):
     assert resolved["source"] == "manual"
 
 
+def test_resolve_runtime_provider_nous_pool_uses_env_base_url_override(monkeypatch):
+    entry = SimpleNamespace(
+        provider="nous",
+        source="device_code",
+        runtime_api_key="pool-token",
+        agent_key="pool-token",
+        agent_key_expires_at="2099-01-01T00:00:00+00:00",
+        scope="inference:invoke",
+        runtime_base_url="https://inference-api.nousresearch.com/v1",
+    )
+
+    class _Pool:
+        def has_credentials(self):
+            return True
+
+        def select(self):
+            return entry
+
+    monkeypatch.setenv("NOUS_INFERENCE_BASE_URL", "https://ai.wildebeest-newton.ts.net/v1")
+    monkeypatch.setattr(rp, "resolve_provider", lambda *a, **k: "nous")
+    monkeypatch.setattr(rp, "_agent_key_is_usable", lambda *a, **k: True)
+    monkeypatch.setattr(rp, "load_pool", lambda provider: _Pool())
+
+    resolved = rp.resolve_runtime_provider(requested="nous")
+
+    assert resolved["provider"] == "nous"
+    assert resolved["api_key"] == "pool-token"
+    assert resolved["base_url"] == "https://ai.wildebeest-newton.ts.net/v1"
+
+
 def test_resolve_runtime_provider_anthropic_pool_respects_config_base_url(monkeypatch):
     class _Entry:
         access_token = "pool-token"