hermes: adaptively scale engineering routes

services/hermes/agent-configmap.yaml

@@ -10,15 +10,15 @@ data:
   config.yaml: |
     model:
       provider: atlas-switchyard
-      default: atlas/auto/maximum
+      default: atlas/auto/balanced
-      model: atlas/auto/maximum
+      model: atlas/auto/balanced
 
     providers:
       atlas-switchyard:
         name: Atlas Switchyard
         api: http://hermes-switchyard.hermes.svc.cluster.local:9005/v1
         api_key: atlas-switchyard
-        default_model: atlas/auto/maximum
+        default_model: atlas/auto/balanced
         transport: chat_completions
 
     fallback_providers: []

services/hermes/plugins/auto-router/__init__.py

@@ -15,6 +15,7 @@ except ImportError:  # Direct module loading in the small unit-test harness.
 
 
 POLICY_PATH = Path("/opt/data/workspace/coordinator/route-policy.json")
+POLICY_VERSION = 2
 SWITCHYARD_PROVIDER = "atlas-switchyard"
 ROUTER_PROFILE = os.environ.get("HERMES_AUTO_ROUTER_PROFILE", "").strip().lower()
 if ROUTER_PROFILE not in {"chat", "triage", "agent"}:
@@ -27,7 +28,7 @@ if ROUTER_PROFILE not in {"chat", "triage", "agent"}:
 PROFILE_ROUTE = {
     "chat": "atlas/auto/fast",
     "triage": "atlas/auto/deep",
-    "agent": "atlas/auto/maximum",
+    "agent": "atlas/auto/balanced",
 }
 PRIORITY_ROUTE = {
     "fast": "atlas/auto/fast",
@@ -65,6 +66,12 @@ def _load_policy() -> dict[str, Any]:
         value = {}
     if not isinstance(value, dict):
         value = {}
+    if value.get("version") != POLICY_VERSION:
+        value = {
+            "version": POLICY_VERSION,
+            "mode": "auto",
+            "auto_route": PROFILE_ROUTE[ROUTER_PROFILE],
+        }
     if value.get("mode") not in {"auto", "manual"}:
         value["mode"] = "auto"
     route = str(value.get("auto_route") or "")
@@ -75,6 +82,7 @@ def _load_policy() -> dict[str, Any]:
 
 def _write_policy(value: dict[str, Any]) -> None:
     """Persist route preference atomically inside the current workspace."""
+    value["version"] = POLICY_VERSION
     POLICY_PATH.parent.mkdir(parents=True, exist_ok=True)
     temporary = POLICY_PATH.with_suffix(".json.tmp")
     temporary.write_text(

services/hermes/switchyard-deployment.yaml

@@ -22,7 +22,7 @@ spec:
       labels:
         app: hermes-switchyard
       annotations:
-        ai.bstein.dev/config-rev: "20260815-maximum-high-floor"
+        ai.bstein.dev/config-rev: "20260815-quality-escalation"
         prometheus.io/scrape: "true"
         prometheus.io/port: "9005"
         prometheus.io/path: /metrics

testing/tests/test_hermes_auto_router.py

@@ -43,7 +43,7 @@ def test_profile_defaults_are_distinct_and_quality_ordered():
     assert router.PROFILE_ROUTE == {
         "chat": "atlas/auto/fast",
         "triage": "atlas/auto/deep",
-        "agent": "atlas/auto/maximum",
+        "agent": "atlas/auto/balanced",
     }
     assert router.PROFILE_ROUTE[router.ROUTER_PROFILE] in router.AUTO_ROUTES
 
@@ -59,6 +59,25 @@ def test_auto_boundary_selects_only_a_public_switchyard_route(tmp_path, monkeypa
     assert source == "auto"
 
 
+def test_legacy_maximum_default_migrates_to_adaptive_agent_route(
+    tmp_path, monkeypatch
+):
+    path = tmp_path / "route-policy.json"
+    path.write_text(
+        json.dumps({"mode": "auto", "auto_route": "atlas/auto/maximum"}),
+        encoding="utf-8",
+    )
+    monkeypatch.setattr(router, "POLICY_PATH", path)
+
+    policy = router._load_policy()
+
+    assert policy == {
+        "version": router.POLICY_VERSION,
+        "mode": "auto",
+        "auto_route": router.PROFILE_ROUTE[router.ROUTER_PROFILE],
+    }
+
+
 def test_ui_priority_changes_auto_posture_without_selecting_a_target(
     tmp_path, monkeypatch
 ):

testing/tests/test_hermes_cli_lanes.py

@@ -658,6 +658,11 @@ def test_legacy_state_is_archived_without_removing_provider_transcripts(tmp_path
 def test_agent_uses_one_native_kanban_control_plane():
     configmap = yaml.safe_load((HERMES / "agent-configmap.yaml").read_text())
     config = yaml.safe_load(configmap["data"]["config.yaml"])
+    assert config["model"] == {
+        "provider": "atlas-switchyard",
+        "default": "atlas/auto/balanced",
+        "model": "atlas/auto/balanced",
+    }
     assert config["kanban"]["dispatch_in_gateway"] is True
     assert config["kanban"]["default_assignee"] == "cli-auto"
     assert config["plugins"]["enabled"] == ["auto-router"]