refactor(backend/chat): Remove unused max_context_messages config

autogpt_platform/backend/backend/api/features/chat/config.py

@@ -27,15 +27,6 @@ class ChatConfig(BaseSettings):
     session_ttl: int = Field(default=43200, description="Session TTL in seconds")
 
     # Streaming Configuration
-    # Only used by the non-SDK fallback path (Anthropic direct).
-    # The SDK path passes full history and relies on SDK's built-in compaction.
-    max_context_messages: int = Field(
-        default=100,
-        ge=1,
-        le=500,
-        description="Max context messages for non-SDK fallback path only",
-    )
-
     stream_timeout: int = Field(default=300, description="Stream timeout in seconds")
     max_retries: int = Field(
         default=3,

autogpt_platform/backend/backend/api/features/chat/service.py

@@ -368,7 +368,6 @@ async def stream_chat_completion(
 
     Raises:
         NotFoundError: If session_id is invalid
-        ValueError: If max_context_messages is exceeded
 
     """
     completion_start = time.monotonic()