fix: /model command — bare provider names, custom endpoint display

Two issues with /model preventing proper provider switching:

1. Bare provider names not detected: typing '/model nous' treated 'nous'
   as a model name instead of triggering a provider switch. Fixed by adding
   step 0 in detect_provider_for_model() that checks if the input matches
   a known provider name/alias (excluding 'custom'/'openrouter' which need
   explicit model names) and returns that provider's default model.

2. Custom endpoint details hidden: /model (no args) showed '[custom]' with
   just a usage hint but no endpoint URL or model name. Now displays the
   configured base_url for custom providers in both CLI and gateway.

Note: config base_url and OPENAI_BASE_URL are intentionally NOT cleared on
provider switch — dedicated provider paths (nous, anthropic, codex) have
their own credential resolution that ignores these, and clearing them would
destroy the user's custom endpoint config, preventing switching back.

cli.py

@@ -973,6 +973,8 @@ def save_config_value(key_path: str, value: any) -> bool:
         return False
 
 
+
+
 # ============================================================================
 # HermesCLI Class
 # ============================================================================
@@ -2890,6 +2892,14 @@ class HermesCLI:
                     for mid, desc in curated:
                         current_marker = " ← current" if (is_active and mid == self.model) else ""
                         print(f"      {mid}{current_marker}")
+                elif p["id"] == "custom":
+                    from hermes_cli.models import _get_custom_base_url
+                    custom_url = _get_custom_base_url() or os.getenv("OPENAI_BASE_URL", "")
+                    if custom_url:
+                        print(f"      endpoint: {custom_url}")
+                    if is_active:
+                        print(f"      model: {self.model} ← current")
+                    print(f"      (use /model custom:<model-name>)")
                 else:
                     print(f"      (use /model {p['id']}:<model-name>)")
                 print()

gateway/run.py

@@ -2380,8 +2380,14 @@ class GatewayRunner:
             lines = [
                 f"🤖 **Current model:** `{current}`",
                 f"**Provider:** {provider_label}",
-                "",
             ]
+            # Show custom endpoint URL when using a custom provider
+            if current_provider == "custom":
+                from hermes_cli.models import _get_custom_base_url
+                custom_url = _get_custom_base_url() or os.getenv("OPENAI_BASE_URL", "")
+                if custom_url:
+                    lines.append(f"**Endpoint:** `{custom_url}`")
+            lines.append("")
             curated = curated_models_for_provider(current_provider)
             if curated:
                 lines.append(f"**Available models ({provider_label}):**")
@@ -2391,7 +2397,7 @@ class GatewayRunner:
                     lines.append(f"• `{mid}`{label}{marker}")
                 lines.append("")
             lines.append("To change: `/model model-name`")
-            lines.append("Switch provider: `/model provider:model-name`")
+            lines.append("Switch provider: `/model provider-name` or `/model provider:model-name`")
             return "\n".join(lines)
 
         # Parse provider:model syntax

hermes_cli/models.py

@@ -389,6 +389,7 @@ def detect_provider_for_model(
     Returns ``None`` when no confident match is found.
 
     Priority:
+    0. Bare provider name → switch to that provider's default model
     1. Direct provider with credentials (highest)
     2. Direct provider without credentials → remap to OpenRouter slug
     3. OpenRouter catalog match
@@ -399,6 +400,21 @@ def detect_provider_for_model(
 
     name_lower = name.lower()
 
+    # --- Step 0: bare provider name typed as model ---
+    # If someone types `/model nous` or `/model anthropic`, treat it as a
+    # provider switch and pick the first model from that provider's catalog.
+    # Skip "custom" and "openrouter" — custom has no model catalog, and
+    # openrouter requires an explicit model name to be useful.
+    resolved_provider = _PROVIDER_ALIASES.get(name_lower, name_lower)
+    if resolved_provider not in {"custom", "openrouter"}:
+        default_models = _PROVIDER_MODELS.get(resolved_provider, [])
+        if (
+            resolved_provider in _PROVIDER_LABELS
+            and default_models
+            and resolved_provider != normalize_provider(current_provider)
+        ):
+            return (resolved_provider, default_models[0])
+
     # Aggregators list other providers' models — never auto-switch TO them
     _AGGREGATORS = {"nous", "openrouter"}