init

agent/portal_tags.py

@@ -55,10 +55,32 @@ def hermes_client_tag() -> str:
     return f"client=hermes-client-v{_hermes_version()}"
 
 
-def nous_portal_tags() -> List[str]:
+def conversation_tag(session_id: str) -> str:
+    """Return the ``conversation=...`` tag for a Hermes session/conversation.
+
+    Format: ``conversation=<session_id>``. ``session_id`` is the canonical
+    Hermes conversation identifier (``AIAgent.session_id``) — the same value
+    used for ``~/.hermes/sessions/`` storage, session logs, and lineage.
+
+    Unlike the product/client tags this is high-cardinality (one value per
+    conversation), so it is only appended when a session id is actually
+    available — never as part of the always-on base tag set.
+    """
+    return f"conversation={session_id}"
+
+
+def nous_portal_tags(session_id: str | None = None) -> List[str]:
     """Return the canonical list of Nous Portal product tags.
 
     Always returns a fresh list so callers can mutate it freely
     (e.g. ``merged_extra.setdefault("tags", []).extend(nous_portal_tags())``).
+
+    When ``session_id`` is provided, a ``conversation=<session_id>`` tag is
+    appended so Portal usage can be attributed to a specific Hermes
+    conversation. Callers without a session id (e.g. the auxiliary client's
+    always-on base tags) omit it and get the canonical two-tag set.
     """
-    return ["product=hermes-agent", hermes_client_tag()]
+    tags = ["product=hermes-agent", hermes_client_tag()]
+    if session_id:
+        tags.append(conversation_tag(session_id))
+    return tags

plugins/model-providers/nous/__init__.py

@@ -13,7 +13,7 @@ class NousProfile(ProviderProfile):
     def build_extra_body(
         self, *, session_id: str | None = None, **context
     ) -> dict[str, Any]:
-        return {"tags": nous_portal_tags()}
+        return {"tags": nous_portal_tags(session_id=session_id)}
 
     def build_api_kwargs_extras(
         self,

tests/agent/test_portal_tags.py

@@ -42,6 +42,33 @@ def test_nous_portal_tags_returns_fresh_list():
     assert "client=test-mutation" not in b
 
 
+def test_conversation_tag_format():
+    """The conversation tag carries the session id verbatim."""
+    from agent.portal_tags import conversation_tag
+
+    assert conversation_tag("abc-123") == "conversation=abc-123"
+
+
+def test_nous_portal_tags_appends_conversation_when_session_id_given():
+    """A session id adds a third, high-cardinality conversation tag."""
+    from agent.portal_tags import conversation_tag, nous_portal_tags
+
+    tags = nous_portal_tags(session_id="sess-42")
+    assert "product=hermes-agent" in tags
+    assert conversation_tag("sess-42") in tags
+    assert len(tags) == 3
+
+
+def test_nous_portal_tags_omits_conversation_without_session_id():
+    """Base tag set stays at two tags when no session id is available."""
+    from agent.portal_tags import nous_portal_tags
+
+    for empty in (None, ""):
+        tags = nous_portal_tags(session_id=empty)
+        assert len(tags) == 2
+        assert not any(t.startswith("conversation=") for t in tags)
+
+
 def test_auxiliary_client_nous_extra_body_uses_helper():
     """auxiliary_client.NOUS_EXTRA_BODY must match the canonical helper output."""
     from agent.auxiliary_client import NOUS_EXTRA_BODY

tests/providers/test_provider_profiles.py

@@ -414,6 +414,12 @@ class TestNousProfile:
         body = p.build_extra_body()
         assert body["tags"] == nous_portal_tags()
 
+    def test_tags_include_conversation_when_session_id(self):
+        from agent.portal_tags import conversation_tag
+        p = get_provider_profile("nous")
+        body = p.build_extra_body(session_id="sess-99")
+        assert conversation_tag("sess-99") in body["tags"]
+
     def test_auth_type(self):
         p = get_provider_profile("nous")
         assert p.auth_type == "oauth_device_code"