fix(model-picker): surface the current custom/uncurated model in picker rows (#53457)

A model selected via the CLI (e.g. /model openrouter/<uncurated-name>) was
absent from every model picker — the main picker AND the MoA reference/
aggregator slot pickers — because each provider row only carried its curated
catalog. Inject the current model at the front of its provider's row so it is
selectable and shown everywhere.

hermes_cli/model_switch.py

@@ -2253,6 +2253,24 @@ def list_authenticated_providers(
             seen_slugs.add(slug.lower())
             _section4_emitted_slugs.add(slug.lower())
 
+    # Surface a custom / uncurated model the user selected via the CLI.
+    # Each row's model list is its curated/live catalog, so a model the user set
+    # with `/model <provider>/<uncurated-name>` would otherwise be invisible in
+    # every picker — the main model picker AND the MoA reference/aggregator slot
+    # pickers, which read these same rows. Inject it at the front of the current
+    # provider's row (matched by slug) so it is selectable and shown. Done as a
+    # post-pass so it covers every provider section uniformly, regardless of
+    # which branch emitted the row.
+    if current_model:
+        for _row in results:
+            if not _row.get("is_current"):
+                continue
+            _models = _row.get("models") or []
+            if current_model not in _models:
+                _row["models"] = [current_model, *_models]
+                _row["total_models"] = _row.get("total_models", len(_models)) + 1
+            break
+
     # Sort: current provider first, then by model count descending
     results.sort(key=lambda r: (not r["is_current"], -r["total_models"]))
 

tests/hermes_cli/test_user_providers_model_switch.py

@@ -1122,3 +1122,63 @@ def test_section3_skips_probe_when_no_key_but_explicit_models(monkeypatch):
     row = next(p for p in providers if p["slug"] == "public-subset")
     assert row["models"] == ["only-a", "only-b"]
     assert row["total_models"] == 2
+
+
+def test_current_custom_model_is_surfaced_in_builtin_provider_row(monkeypatch):
+    """A custom/uncurated model selected via the CLI must appear in its
+    provider's picker row.
+
+    Regression: selecting `/model openrouter/<uncurated-name>` left the model
+    invisible in every picker (main model picker AND the MoA reference/aggregator
+    slot pickers, which read these rows), because the row only carried the
+    curated catalog. The current model is now injected at the front of the
+    current provider's list.
+    """
+    monkeypatch.setattr("agent.models_dev.fetch_models_dev", lambda: {})
+    monkeypatch.setattr("hermes_cli.providers.HERMES_OVERLAYS", {})
+    monkeypatch.setenv("OPENROUTER_API_KEY", "sk-test")
+    # Pin a small curated catalog so the assertion is deterministic.
+    monkeypatch.setattr(
+        "hermes_cli.models.cached_provider_model_ids",
+        lambda slug, **kw: ["anthropic/claude-opus-4.8", "openai/gpt-5.5"]
+        if slug == "openrouter"
+        else [],
+    )
+
+    custom = "some-vendor/totally-custom-model-v9"
+    providers = list_authenticated_providers(
+        current_provider="openrouter",
+        current_model=custom,
+        user_providers={},
+        custom_providers=[],
+    )
+
+    row = next(p for p in providers if p["slug"] == "openrouter")
+    assert custom in row["models"], row["models"]
+    assert row["models"][0] == custom  # injected at the front
+    assert row["total_models"] == 3
+
+
+def test_current_custom_model_not_leaked_into_other_provider_rows(monkeypatch):
+    """The current model is only injected into the CURRENT provider's row,
+    never into other providers (which can't serve it)."""
+    monkeypatch.setattr("agent.models_dev.fetch_models_dev", lambda: {})
+    monkeypatch.setattr("hermes_cli.providers.HERMES_OVERLAYS", {})
+    monkeypatch.setenv("OPENROUTER_API_KEY", "sk-test")
+    monkeypatch.setenv("NOUS_API_KEY", "sk-test")
+    monkeypatch.setattr(
+        "hermes_cli.models.cached_provider_model_ids",
+        lambda slug, **kw: ["curated/one"],
+    )
+
+    custom = "some-vendor/totally-custom-model-v9"
+    providers = list_authenticated_providers(
+        current_provider="openrouter",
+        current_model=custom,
+        user_providers={},
+        custom_providers=[],
+    )
+
+    for row in providers:
+        if row["slug"] != "openrouter" and not row.get("is_current"):
+            assert custom not in row.get("models", []), f"leaked into {row['slug']}"