fix: port LLM provider config and tool schemas

src/llm/providers/resolver.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import os
+from pathlib import Path
 
 from llm.core.interface import LLMProvider
 from llm.core.types import ProviderType
@@ -17,10 +18,45 @@ _PROVIDER_MAP: dict[ProviderType, type[LLMProvider]] = {
     ProviderType.OLLAMA: OllamaProvider,
 }
 
+LLM_ENV_FILE = ".llm.env"
+
+
+def _strip_env_value(value: str) -> str:
+    value = value.strip()
+    if len(value) >= 2 and value[0] == value[-1] and value[0] in {"'", '"'}:
+        return value[1:-1]
+    return value
+
+
+def _read_saved_llm_config(env_path: str | Path = LLM_ENV_FILE) -> dict[str, str]:
+    path = Path(env_path)
+    if not path.is_file():
+        return {}
+
+    config: dict[str, str] = {}
+    for line in path.read_text().splitlines():
+        stripped = line.strip()
+        if not stripped or stripped.startswith("#") or "=" not in stripped:
+            continue
+        key, value = stripped.split("=", 1)
+        config[key.strip()] = _strip_env_value(value)
+    return config
+
+
+def _resolve_provider_type(provider_type: ProviderType | str | None) -> ProviderType | str:
+    if provider_type is not None:
+        return provider_type
+
+    env_provider = os.environ.get("LLM_PROVIDER")
+    if env_provider:
+        return _strip_env_value(env_provider).lower()
+
+    saved_config = _read_saved_llm_config()
+    return saved_config.get("LLM_PROVIDER", "claude").lower()
+
 
 def get_provider(provider_type: ProviderType | str | None = None, **kwargs: str) -> LLMProvider:
-    if provider_type is None:
-        provider_type = os.environ.get("LLM_PROVIDER", "claude").lower()
+    provider_type = _resolve_provider_type(provider_type)
 
     if isinstance(provider_type, str):
         try: