fix(gateway): /profile reports the profile serving the source, not the multiplexer's

On a multiplexed gateway the process-level active profile is always the
multiplexer's own (usually "default"), so /profile answered "default" in
every chat regardless of which profile actually served it — making
per-chat persona routing look broken when it was working.

Report source.profile (stamped by the /p/<profile>/ URL prefix, a
per-credential adapter, or a room->profile map) and resolve the
displayed home under that profile's runtime scope, mirroring the scoped
/reset banner (#59003). Unstamped sources fall back to the active
profile and default home, so single-profile gateways are unchanged.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

gateway/slash_commands.py

@@ -330,12 +330,33 @@ class GatewaySlashCommandsMixin:
         return EphemeralReply(f"{header}{_tip_line}")
 
     async def _handle_profile_command(self, event: MessageEvent) -> str:
-        """Handle /profile — show active profile name and home directory."""
+        """Handle /profile — show the profile serving this source and its home.
+
+        On a multiplexed gateway the process-level active profile is always
+        the multiplexer's own (usually ``default``), so reporting it would
+        answer "default" in every chat regardless of which profile actually
+        serves the room/channel (``source.profile`` — stamped by the
+        ``/p/<profile>/`` URL prefix, a per-credential adapter, or a room→
+        profile map). Report the stamped profile and, like the scoped /reset
+        banner (#59003), resolve the displayed home under that profile's
+        runtime scope. Single-profile gateways are unchanged: an unstamped
+        source falls back to the active profile and the default home.
+        """
         from hermes_constants import display_hermes_home
         from hermes_cli.profiles import get_active_profile_name
 
-        display = display_hermes_home()
-        profile_name = get_active_profile_name()
+        source = getattr(event, "source", None)
+        profile_name = (
+            getattr(source, "profile", "") or ""
+        ).strip() or get_active_profile_name()
+        try:
+            from gateway.run import _profile_runtime_scope
+
+            profile_home = self._resolve_profile_home_for_source(source)
+            with _profile_runtime_scope(profile_home):
+                display = display_hermes_home()
+        except Exception:
+            display = display_hermes_home()
 
         lines = [
             t("gateway.profile.header", profile=profile_name),

tests/gateway/test_status_command.py

@@ -672,6 +672,60 @@ async def test_profile_command_reports_custom_root_profile(monkeypatch, tmp_path
     assert f"**Home:** `{profile_home}`" in result
 
 
+@pytest.mark.asyncio
+async def test_profile_command_reports_source_stamped_profile(monkeypatch, tmp_path):
+    """On a multiplexed gateway, /profile reports the profile SERVING the
+    source (source.profile — URL prefix / per-credential adapter / room map),
+    not the multiplexer's active profile, which is always the default and
+    made /profile answer "default" in every persona chat."""
+    hermes_home = tmp_path / ".hermes"
+    profile_home = hermes_home / "profiles" / "milo"
+    profile_home.mkdir(parents=True)
+
+    session_entry = SessionEntry(
+        session_key=build_session_key(_make_source()),
+        session_id="sess-1",
+        created_at=datetime.now(),
+        updated_at=datetime.now(),
+        platform=Platform.TELEGRAM,
+        chat_type="dm",
+    )
+    runner = _make_runner(session_entry)
+    monkeypatch.setenv("HERMES_HOME", str(hermes_home))
+
+    event = _make_event("/profile")
+    event.source.profile = "milo"
+
+    result = await runner._handle_profile_command(event)
+
+    assert "**Profile:** `milo`" in result
+    assert f"**Home:** `{profile_home}`" in result
+
+
+@pytest.mark.asyncio
+async def test_profile_command_unstamped_source_unchanged(monkeypatch, tmp_path):
+    """Single-profile behavior is untouched: an unstamped source reports the
+    active profile and the default home."""
+    hermes_home = tmp_path / ".hermes"
+    hermes_home.mkdir()
+
+    session_entry = SessionEntry(
+        session_key=build_session_key(_make_source()),
+        session_id="sess-1",
+        created_at=datetime.now(),
+        updated_at=datetime.now(),
+        platform=Platform.TELEGRAM,
+        chat_type="dm",
+    )
+    runner = _make_runner(session_entry)
+    monkeypatch.setenv("HERMES_HOME", str(hermes_home))
+
+    result = await runner._handle_profile_command(_make_event("/profile"))
+
+    assert "**Profile:** `default`" in result
+    assert f"**Home:** `{hermes_home}`" in result
+
+
 @pytest.mark.asyncio
 async def test_post_delivery_callback_generation_snapshot_happens_after_bind():
     """Regression: the callback_generation snapshot in _process_message_background