fix(model): normalize native provider-prefixed model ids

cli.py

@@ -2027,6 +2027,25 @@ class HermesCLI:
         current_model = (self.model or "").strip()
         changed = False
 
+        try:
+            from hermes_cli.model_normalize import (
+                _AGGREGATOR_PROVIDERS,
+                normalize_model_for_provider,
+            )
+
+            if resolved_provider not in _AGGREGATOR_PROVIDERS:
+                normalized_model = normalize_model_for_provider(current_model, resolved_provider)
+                if normalized_model and normalized_model != current_model:
+                    if not self._model_is_default:
+                        self.console.print(
+                            f"[yellow]⚠️  Normalized model '{current_model}' to '{normalized_model}' for {resolved_provider}.[/]"
+                        )
+                    self.model = normalized_model
+                    current_model = normalized_model
+                    changed = True
+        except Exception:
+            pass
+
         if resolved_provider == "copilot":
             try:
                 from hermes_cli.models import copilot_model_api_mode, normalize_copilot_model_id
@@ -2072,7 +2091,7 @@ class HermesCLI:
             return changed
 
         if resolved_provider != "openai-codex":
-            return False
+            return changed
 
         # 1. Strip provider prefix ("openai/gpt-5.4" → "gpt-5.4")
         if "/" in current_model:

hermes_cli/model_normalize.py

@@ -168,6 +168,40 @@ def _dots_to_hyphens(model_name: str) -> str:
     return model_name.replace(".", "-")
 
 
+def _normalize_provider_alias(provider_name: str) -> str:
+    """Resolve provider aliases to Hermes' canonical ids."""
+    raw = (provider_name or "").strip().lower()
+    if not raw:
+        return raw
+    try:
+        from hermes_cli.models import normalize_provider
+
+        return normalize_provider(raw)
+    except Exception:
+        return raw
+
+
+def _strip_matching_provider_prefix(model_name: str, target_provider: str) -> str:
+    """Strip ``provider/`` only when the prefix matches the target provider.
+
+    This prevents arbitrary slash-bearing model IDs from being mangled on
+    native providers while still repairing manual config values like
+    ``zai/glm-5.1`` for the ``zai`` provider.
+    """
+    if "/" not in model_name:
+        return model_name
+
+    prefix, remainder = model_name.split("/", 1)
+    if not prefix.strip() or not remainder.strip():
+        return model_name
+
+    normalized_prefix = _normalize_provider_alias(prefix)
+    normalized_target = _normalize_provider_alias(target_provider)
+    if normalized_prefix and normalized_prefix == normalized_target:
+        return remainder.strip()
+    return model_name
+
+
 def detect_vendor(model_name: str) -> Optional[str]:
     """Detect the vendor slug from a bare model name.
 
@@ -305,24 +339,33 @@ def normalize_model_for_provider(model_input: str, target_provider: str) -> str:
     if not name:
         return name
 
-    provider = (target_provider or "").strip().lower()
+    provider = _normalize_provider_alias(target_provider)
 
     # --- Aggregators: need vendor/model format ---
     if provider in _AGGREGATOR_PROVIDERS:
         return _prepend_vendor(name)
 
-    # --- Anthropic / OpenCode: strip vendor, dots -> hyphens ---
+    # --- Anthropic / OpenCode: strip matching provider prefix, dots -> hyphens ---
     if provider in _DOT_TO_HYPHEN_PROVIDERS:
-        bare = _strip_vendor_prefix(name)
+        bare = _strip_matching_provider_prefix(name, provider)
+        if "/" in bare:
+            return bare
         return _dots_to_hyphens(bare)
 
-    # --- Copilot: strip vendor, keep dots ---
+    # --- Copilot: strip matching provider prefix, keep dots ---
     if provider in _STRIP_VENDOR_ONLY_PROVIDERS:
-        return _strip_vendor_prefix(name)
+        return _strip_matching_provider_prefix(name, provider)
 
     # --- DeepSeek: map to one of two canonical names ---
     if provider == "deepseek":
-        return _normalize_for_deepseek(name)
+        bare = _strip_matching_provider_prefix(name, provider)
+        if "/" in bare:
+            return bare
+        return _normalize_for_deepseek(bare)
+
+    # --- Native passthrough providers: strip only matching provider prefixes ---
+    if provider in _PASSTHROUGH_PROVIDERS - {"custom", "huggingface", "openai-codex"}:
+        return _strip_matching_provider_prefix(name, provider)
 
     # --- Custom & all others: pass through as-is ---
     return name

run_agent.py

@@ -606,6 +606,17 @@ class AIAgent:
         else:
             self.api_mode = "chat_completions"
 
+        try:
+            from hermes_cli.model_normalize import (
+                _AGGREGATOR_PROVIDERS,
+                normalize_model_for_provider,
+            )
+
+            if self.provider not in _AGGREGATOR_PROVIDERS:
+                self.model = normalize_model_for_provider(self.model, self.provider)
+        except Exception:
+            pass
+
         # Direct OpenAI sessions use the Responses API path.  GPT-5.x tool
         # calls with reasoning are rejected on /v1/chat/completions, and
         # Hermes is a tool-using client by default.

tests/hermes_cli/test_codex_models.py

@@ -150,6 +150,12 @@ class TestNormalizeModelForProvider:
         assert changed is False
         assert cli.model == "gpt-5.4"
 
+    def test_native_provider_prefix_is_stripped_before_agent_startup(self):
+        cli = _make_cli(model="zai/glm-5.1")
+        changed = cli._normalize_model_for_provider("zai")
+        assert changed is True
+        assert cli.model == "glm-5.1"
+
     def test_bare_codex_model_passes_through(self):
         cli = _make_cli(model="gpt-5.3-codex")
         changed = cli._normalize_model_for_provider("openai-codex")

tests/hermes_cli/test_model_normalize.py

@@ -102,6 +102,21 @@ class TestAggregatorProviders:
         assert result == "anthropic/claude-sonnet-4.6"
 
 
+class TestIssue6211NativeProviderPrefixNormalization:
+    @pytest.mark.parametrize("model,target_provider,expected", [
+        ("zai/glm-5.1", "zai", "glm-5.1"),
+        ("google/gemini-2.5-pro", "gemini", "gemini-2.5-pro"),
+        ("moonshot/kimi-k2.5", "kimi-coding", "kimi-k2.5"),
+        ("anthropic/claude-sonnet-4.6", "openrouter", "anthropic/claude-sonnet-4.6"),
+        ("Qwen/Qwen3.5-397B-A17B", "huggingface", "Qwen/Qwen3.5-397B-A17B"),
+        ("modal/zai-org/GLM-5-FP8", "custom", "modal/zai-org/GLM-5-FP8"),
+    ])
+    def test_native_provider_prefixes_are_only_stripped_on_matching_provider(
+        self, model, target_provider, expected
+    ):
+        assert normalize_model_for_provider(model, target_provider) == expected
+
+
 # ── detect_vendor ──────────────────────────────────────────────────────
 
 class TestDetectVendor:

tests/run_agent/test_run_agent.py

@@ -138,6 +138,48 @@ def test_aiagent_reuses_existing_errors_log_handler():
             root_logger.addHandler(handler)
 
 
+class TestProviderModelNormalization:
+    def test_aiagent_strips_matching_native_provider_prefix(self):
+        with (
+            patch(
+                "run_agent.get_tool_definitions", return_value=_make_tool_defs("web_search")
+            ),
+            patch("run_agent.check_toolset_requirements", return_value={}),
+            patch("run_agent.OpenAI"),
+        ):
+            agent = AIAgent(
+                model="zai/glm-5.1",
+                provider="zai",
+                base_url="https://api.z.ai/api/paas/v4",
+                api_key="test-key-1234567890",
+                quiet_mode=True,
+                skip_context_files=True,
+                skip_memory=True,
+            )
+
+        assert agent.model == "glm-5.1"
+
+    def test_aiagent_keeps_aggregator_vendor_slug(self):
+        with (
+            patch(
+                "run_agent.get_tool_definitions", return_value=_make_tool_defs("web_search")
+            ),
+            patch("run_agent.check_toolset_requirements", return_value={}),
+            patch("run_agent.OpenAI"),
+        ):
+            agent = AIAgent(
+                model="anthropic/claude-sonnet-4.6",
+                provider="openrouter",
+                base_url="https://openrouter.ai/api/v1",
+                api_key="test-key-1234567890",
+                quiet_mode=True,
+                skip_context_files=True,
+                skip_memory=True,
+            )
+
+        assert agent.model == "anthropic/claude-sonnet-4.6"
+
+
 # ---------------------------------------------------------------------------
 # Helper to build mock assistant messages (API response objects)
 # ---------------------------------------------------------------------------