diff --git a/hermes_cli/auth_commands.py b/hermes_cli/auth_commands.py
index c6e23b42f6..20d0282001 100644
--- a/hermes_cli/auth_commands.py
+++ b/hermes_cli/auth_commands.py
@@ -4,6 +4,7 @@ from __future__ import annotations
 
 from getpass import getpass
 import math
+import sys
 import time
 from types import SimpleNamespace
 import uuid
@@ -160,7 +161,10 @@ def auth_add_command(args) -> None:
         default_label = _api_key_default_label(len(pool.entries()) + 1)
         label = (getattr(args, "label", None) or "").strip()
         if not label:
-            label = input(f"Label (optional, default: {default_label}): ").strip() or default_label
+            if sys.stdin.isatty():
+                label = input(f"Label (optional, default: {default_label}): ").strip() or default_label
+            else:
+                label = default_label
         entry = PooledCredential(
             provider=provider,
             id=uuid.uuid4().hex[:6],
diff --git a/hermes_cli/main.py b/hermes_cli/main.py
index 638f2a31c3..5c6db4e904 100644
--- a/hermes_cli/main.py
+++ b/hermes_cli/main.py
@@ -6325,8 +6325,13 @@ Examples:
             sys.stderr = _io.StringIO()
             args = parser.parse_args(_processed_argv)
             sys.stderr = _saved_stderr
-        except SystemExit:
+        except SystemExit as exc:
             sys.stderr = _saved_stderr
+            # Help/version flags (exit code 0) already printed output —
+            # re-raise immediately to avoid a second parse_args printing
+            # the same help text again (#10230).
+            if exc.code == 0:
+                raise
             # Subcommand name was consumed as a flag value (e.g. -c model).
             # Fall back to optional subparsers so argparse handles it normally.
             subparsers.required = False
diff --git a/hermes_cli/model_switch.py b/hermes_cli/model_switch.py
index 699bde23e9..dee0cb23d2 100644
--- a/hermes_cli/model_switch.py
+++ b/hermes_cli/model_switch.py
@@ -786,7 +786,8 @@ def list_authenticated_providers(
     from hermes_cli.models import OPENROUTER_MODELS, _PROVIDER_MODELS
 
     results: List[dict] = []
-    seen_slugs: set = set()
+    seen_slugs: set = set()  # lowercase-normalized to catch case variants (#9545)
+    seen_mdev_ids: set = set()  # prevent duplicate entries for aliases (e.g. kimi-coding + kimi-coding-cn)
 
     data = fetch_models_dev()
 
@@ -799,6 +800,11 @@ def list_authenticated_providers(
 
     # --- 1. Check Hermes-mapped providers ---
     for hermes_id, mdev_id in PROVIDER_TO_MODELS_DEV.items():
+        # Skip aliases that map to the same models.dev provider (e.g.
+        # kimi-coding and kimi-coding-cn both → kimi-for-coding).
+        # The first one with valid credentials wins (#10526).
+        if mdev_id in seen_mdev_ids:
+            continue
         pdata = data.get(mdev_id)
         if not isinstance(pdata, dict):
             continue
@@ -837,7 +843,8 @@ def list_authenticated_providers(
             "total_models": total,
             "source": "built-in",
         })
-        seen_slugs.add(slug)
+        seen_slugs.add(slug.lower())
+        seen_mdev_ids.add(mdev_id)
 
     # --- 2. Check Hermes-only providers (nous, openai-codex, copilot, opencode-go) ---
     from hermes_cli.providers import HERMES_OVERLAYS
@@ -849,12 +856,12 @@ def list_authenticated_providers(
     _mdev_to_hermes = {v: k for k, v in PROVIDER_TO_MODELS_DEV.items()}
 
     for pid, overlay in HERMES_OVERLAYS.items():
-        if pid in seen_slugs:
+        if pid.lower() in seen_slugs:
             continue
 
         # Resolve Hermes slug — e.g. "github-copilot" → "copilot"
         hermes_slug = _mdev_to_hermes.get(pid, pid)
-        if hermes_slug in seen_slugs:
+        if hermes_slug.lower() in seen_slugs:
             continue
 
         # Check if credentials exist
@@ -935,8 +942,8 @@ def list_authenticated_providers(
             "total_models": total,
             "source": "hermes",
         })
-        seen_slugs.add(pid)
-        seen_slugs.add(hermes_slug)
+        seen_slugs.add(pid.lower())
+        seen_slugs.add(hermes_slug.lower())
 
     # --- 2b. Cross-check canonical provider list ---
     # Catches providers that are in CANONICAL_PROVIDERS but weren't found
@@ -948,7 +955,7 @@ def list_authenticated_providers(
         _canon_provs = []
 
     for _cp in _canon_provs:
-        if _cp.slug in seen_slugs:
+        if _cp.slug.lower() in seen_slugs:
             continue
 
         # Check credentials via PROVIDER_REGISTRY (auth.py)
@@ -995,7 +1002,7 @@ def list_authenticated_providers(
             "total_models": _cp_total,
             "source": "canonical",
         })
-        seen_slugs.add(_cp.slug)
+        seen_slugs.add(_cp.slug.lower())
 
     # --- 3. User-defined endpoints from config ---
     if user_providers and isinstance(user_providers, dict):
@@ -1068,7 +1075,7 @@ def list_authenticated_providers(
                 groups[slug]["models"].append(default_model)
 
         for slug, grp in groups.items():
-            if slug in seen_slugs:
+            if slug.lower() in seen_slugs:
                 continue
             results.append({
                 "slug": slug,
@@ -1080,7 +1087,7 @@ def list_authenticated_providers(
                 "source": "user-config",
                 "api_url": grp["api_url"],
             })
-            seen_slugs.add(slug)
+            seen_slugs.add(slug.lower())
 
     # Sort: current provider first, then by model count descending
     results.sort(key=lambda r: (not r["is_current"], -r["total_models"]))