fix: register anthropic provider, normalize togetherAI alias, fix dsk_deepseek exception handling

- Add 'anthropic' to available_providers and unsafe_providers so users can set
  provider_name = anthropic in config.ini and use ANTHROPIC_API_KEY
- Add provider name alias normalization so 'togetherAI' (as documented in README)
  is accepted as equivalent to 'together'
- Fix NameError in dsk_deepseek: add 'as e' to AuthenticationError, RateLimitError,
  and NetworkError except clauses where 'e' was referenced but not bound
- Remove unreachable 'return thought' dead code at end of lm_studio_fn
- Update README to list Anthropic as a supported API provider

README.md

@@ -240,6 +240,7 @@ provider_server_address = # Typically ignored or can be left blank when is_local
 | Hugging Face | `huggingface`   | No     | Use models from Hugging Face Inference API.       | [huggingface.co/settings/tokens](https://huggingface.co/settings/tokens) |
 | TogetherAI   | `togetherAI`    | No     | Use various open-source models via TogetherAI API.| [api.together.ai/settings/api-keys](https://api.together.ai/settings/api-keys) |
 | OpenRouter   | `openrouter`    | No     | Use OpenRouter Models| [https://openrouter.ai/](https://openrouter.ai/) |
+| Anthropic    | `anthropic`     | No     | Use Claude models via Anthropic's API.            | [console.anthropic.com](https://console.anthropic.com/) |
 | MiniMax      | `minimax`       | No     | Use MiniMax M2.5 series models (e.g., MiniMax-M2.5).| [platform.minimax.io](https://platform.minimax.io/user-center/basic-information) |
 
 *Note:*

sources/llm_provider.py

@@ -17,6 +17,9 @@ from sources.utility import pretty_print, animate_thinking
 class Provider:
     def __init__(self, provider_name, model, server_address="127.0.0.1:5000", is_local=False):
         self.provider_name = provider_name.lower()
+        # Normalize provider name aliases (e.g. README documents 'togetherAI' but canonical key is 'together')
+        _aliases = {"togetherai": "together"}
+        self.provider_name = _aliases.get(self.provider_name, self.provider_name)
         self.model = model
         self.is_local = is_local
         self.server_ip = server_address
@@ -32,13 +35,14 @@ class Provider:
             "together": self.together_fn,
             "dsk_deepseek": self.dsk_deepseek,
             "openrouter": self.openrouter_fn,
+            "anthropic": self.anthropic_fn,
             "minimax": self.minimax_fn,
             "test": self.test_fn
         }
         self.logger = Logger("provider.log")
         self.api_key = None
         self.internal_url, self.in_docker = self.get_internal_url()
-        self.unsafe_providers = ["openai", "deepseek", "dsk_deepseek", "together", "google", "openrouter", "minimax"]
+        self.unsafe_providers = ["openai", "deepseek", "dsk_deepseek", "together", "google", "openrouter", "anthropic", "minimax"]
         if self.provider_name not in self.available_providers:
             raise ValueError(f"Unknown provider: {provider_name}")
         if self.provider_name in self.unsafe_providers and self.is_local == False:
@@ -388,7 +392,6 @@ class Provider:
             if "LM Studio" in str(e):
                 raise  # Re-raise our custom exceptions
             raise Exception(f"Unexpected error: {str(e)}") from e
-        return thought
 
     def openrouter_fn(self, history, verbose=False):
         """
@@ -468,13 +471,13 @@ class Provider:
                 if chunk['type'] == 'text':
                     thought += chunk['content']
             return thought
-        except AuthenticationError:
+        except AuthenticationError as e:
             raise AuthenticationError("Authentication failed. Please check your token.") from e
-        except RateLimitError:
+        except RateLimitError as e:
             raise RateLimitError("Rate limit exceeded. Please wait before making more requests.") from e
         except CloudflareError as e:
             raise CloudflareError(f"Cloudflare protection encountered: {str(e)}") from e
-        except NetworkError:
+        except NetworkError as e:
             raise NetworkError("Network error occurred. Check your internet connection.") from e
         except APIError as e:
             raise APIError(f"API error occurred: {str(e)}") from e