Update code

config.py

@@ -7,6 +7,20 @@ def to_bool(value: str, default: bool = False) -> bool:
     return str(value).strip().lower() in {"true", "1", "yes", "on"}
 
 
+def to_int(value: str, default: int) -> int:
+    try:
+        return int(str(value).strip())
+    except Exception:
+        return default
+
+
+def to_float(value: str, default: float) -> float:
+    try:
+        return float(str(value).strip())
+    except Exception:
+        return default
+
+
 class Settings:
     APP_NAME = "Chat7 CodeX Backend"
     APP_VERSION = "1.0.0"
@@ -18,16 +32,18 @@ class Settings:
     STACKOVERFLOW_KEY = os.getenv("STACKOVERFLOW_KEY", "")
     HUGGINGFACE_API_TOKEN = os.getenv("HUGGINGFACE_API_TOKEN", "")
 
-    MODEL_TIMEOUT_SECONDS = int(os.getenv("MODEL_TIMEOUT_SECONDS", "90"))
-    SEARCH_TIMEOUT_SECONDS = int(os.getenv("SEARCH_TIMEOUT_SECONDS", "20"))
+    MODEL_TIMEOUT_SECONDS = to_int(os.getenv("MODEL_TIMEOUT_SECONDS", "90"), 90)
+    SEARCH_TIMEOUT_SECONDS = to_int(os.getenv("SEARCH_TIMEOUT_SECONDS", "20"), 20)
 
-    MAX_HISTORY_ITEMS = int(os.getenv("MAX_HISTORY_ITEMS", "5"))
-    MAX_CODE_CHARS = int(os.getenv("MAX_CODE_CHARS", "25000"))
-    MAX_ERROR_CHARS = int(os.getenv("MAX_ERROR_CHARS", "8000"))
+    MAX_HISTORY_ITEMS = to_int(os.getenv("MAX_HISTORY_ITEMS", "5"), 5)
+    MAX_CODE_CHARS = to_int(os.getenv("MAX_CODE_CHARS", "25000"), 25000)
+    MAX_ERROR_CHARS = to_int(os.getenv("MAX_ERROR_CHARS", "8000"), 8000)
+    MAX_MESSAGE_CHARS = to_int(os.getenv("MAX_MESSAGE_CHARS", "6000"), 6000)
+    MAX_PREVIOUS_CONTEXT_CHARS = to_int(os.getenv("MAX_PREVIOUS_CONTEXT_CHARS", "6000"), 6000)
 
-    MAX_STACK_RESULTS = int(os.getenv("MAX_STACK_RESULTS", "5"))
-    MAX_GITHUB_RESULTS = int(os.getenv("MAX_GITHUB_RESULTS", "5"))
-    MAX_RETRIEVED_ITEMS = int(os.getenv("MAX_RETRIEVED_ITEMS", "8"))
+    MAX_STACK_RESULTS = to_int(os.getenv("MAX_STACK_RESULTS", "5"), 5)
+    MAX_GITHUB_RESULTS = to_int(os.getenv("MAX_GITHUB_RESULTS", "5"), 5)
+    MAX_RETRIEVED_ITEMS = to_int(os.getenv("MAX_RETRIEVED_ITEMS", "8"), 8)
 
     ENABLE_STACK_SEARCH = to_bool(os.getenv("ENABLE_STACK_SEARCH", "true"), True)
     ENABLE_GITHUB_SEARCH = to_bool(os.getenv("ENABLE_GITHUB_SEARCH", "true"), True)
@@ -35,11 +51,19 @@ class Settings:
     ENABLE_RETRIEVAL_FOR_DEBUG = to_bool(os.getenv("ENABLE_RETRIEVAL_FOR_DEBUG", "true"), True)
     ENABLE_RETRIEVAL_FOR_GENERATE = to_bool(os.getenv("ENABLE_RETRIEVAL_FOR_GENERATE", "false"), False)
     ENABLE_RETRIEVAL_FOR_EXPLAIN = to_bool(os.getenv("ENABLE_RETRIEVAL_FOR_EXPLAIN", "false"), False)
+    ENABLE_RETRIEVAL_FOR_REVIEW = to_bool(os.getenv("ENABLE_RETRIEVAL_FOR_REVIEW", "false"), False)
+    ENABLE_RETRIEVAL_FOR_REFACTOR = to_bool(os.getenv("ENABLE_RETRIEVAL_FOR_REFACTOR", "false"), False)
+
+    DEFAULT_TEMPERATURE = to_float(os.getenv("DEFAULT_TEMPERATURE", "0.2"), 0.2)
+    DEFAULT_TOP_P = to_float(os.getenv("DEFAULT_TOP_P", "0.9"), 0.9)
 
-    DEFAULT_TEMPERATURE = float(os.getenv("DEFAULT_TEMPERATURE", "0.2"))
-    DEFAULT_TOP_P = float(os.getenv("DEFAULT_TOP_P", "0.9"))
+    MAX_OUTPUT_TOKENS = to_int(os.getenv("MAX_OUTPUT_TOKENS", "1200"), 1200)
 
-    MAX_OUTPUT_TOKENS = int(os.getenv("MAX_OUTPUT_TOKENS", "1200"))
+    PRESERVE_SYMBOL_NAMES_BY_DEFAULT = to_bool(
+        os.getenv("PRESERVE_SYMBOL_NAMES_BY_DEFAULT", "true"),
+        True,
+    )
+    ENABLE_SCOPE_GUARD = to_bool(os.getenv("ENABLE_SCOPE_GUARD", "true"), True)
 
     ALLOWED_TASK_TYPES = {
         "generate",