Strix LLM Documentation and Config Changes (#315)

* feat: add to readme new keys

* feat: shoutout strix models, docs

* fix: mypy error

* fix: base api

* docs: update quickstart and models

* fixes: changes to docs

uniform api_key variable naming

* test: git commit hook

* nevermind it was nothing

* docs: Update default model to claude-sonnet-4.6 and improve Strix Router docs

- Replace gpt-5 and opus-4.6 defaults with claude-sonnet-4.6 across all docs and code
- Rewrite Strix Router (models.mdx) page with clearer structure and messaging
- Add Strix Router as recommended option in overview.mdx and quickstart prerequisites
- Update stale Claude 4.5 references to 4.6 in anthropic.mdx, openrouter.mdx, bug_report.md
- Fix install.sh links to point to models.strix.ai and correct docs URLs
- Update error message examples in main.py to use claude-sonnet-4-6

---------

Co-authored-by: 0xallam <ahmed39652003@gmail.com>

strix/interface/main.py

@@ -51,10 +51,13 @@ def validate_environment() -> None:  # noqa: PLR0912, PLR0915
     missing_required_vars = []
     missing_optional_vars = []
 
-    if not Config.get("strix_llm"):
+    strix_llm = Config.get("strix_llm")
+    uses_strix_models = strix_llm and strix_llm.startswith("strix/")
+
+    if not strix_llm:
         missing_required_vars.append("STRIX_LLM")
 
-    has_base_url = any(
+    has_base_url = uses_strix_models or any(
         [
             Config.get("llm_api_base"),
             Config.get("openai_api_base"),
@@ -96,7 +99,7 @@ def validate_environment() -> None:  # noqa: PLR0912, PLR0915
                 error_text.append("• ", style="white")
                 error_text.append("STRIX_LLM", style="bold cyan")
                 error_text.append(
-                    " - Model name to use with litellm (e.g., 'openai/gpt-5')\n",
+                    " - Model name to use with litellm (e.g., 'anthropic/claude-sonnet-4-6')\n",
                     style="white",
                 )
 
@@ -135,7 +138,10 @@ def validate_environment() -> None:  # noqa: PLR0912, PLR0915
                     )
 
         error_text.append("\nExample setup:\n", style="white")
-        error_text.append("export STRIX_LLM='openai/gpt-5'\n", style="dim white")
+        if uses_strix_models:
+            error_text.append("export STRIX_LLM='strix/claude-sonnet-4.6'\n", style="dim white")
+        else:
+            error_text.append("export STRIX_LLM='anthropic/claude-sonnet-4-6'\n", style="dim white")
 
         if missing_optional_vars:
             for var in missing_optional_vars:
@@ -198,17 +204,12 @@ def check_docker_installed() -> None:
 
 
 async def warm_up_llm() -> None:
+    from strix.config.config import resolve_llm_config
+
     console = Console()
 
     try:
-        model_name = Config.get("strix_llm")
-        api_key = Config.get("llm_api_key")
-        api_base = (
-            Config.get("llm_api_base")
-            or Config.get("openai_api_base")
-            or Config.get("litellm_base_url")
-            or Config.get("ollama_api_base")
-        )
+        model_name, api_key, api_base = resolve_llm_config()
 
         test_messages = [
             {"role": "system", "content": "You are a helpful assistant."},