Feat: add act mem and chang deafult config (#91)

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## Checklist:

- [ ] I have performed a self-review of my own code | 我已自行检查了自己的代码
- [ ] I have commented my code in hard-to-understand areas |
我已在难以理解的地方对代码进行了注释
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feature works | 我已添加测试以证明我的修复有效或功能正常
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的人

Author: fridayL

src/memos/api/config.py

@@ -130,6 +130,11 @@ def is_scheduler_enabled() -> bool:
         """Check if scheduler is enabled via environment variable."""
         return os.getenv("MOS_ENABLE_SCHEDULER", "false").lower() == "true"
 
+    @staticmethod
+    def is_default_cube_config_enabled() -> bool:
+        """Check if default cube config is enabled via environment variable."""
+        return os.getenv("MOS_ENABLE_DEFAULT_CUBE_CONFIG", "false").lower() == "true"
+
     @staticmethod
     def get_product_default_config() -> dict[str, Any]:
         """Get default configuration for Product API."""
@@ -321,3 +326,46 @@ def create_user_config(user_name: str, user_id: str) -> tuple[MOSConfig, General
 
         default_mem_cube = GeneralMemCube(default_cube_config)
         return default_config, default_mem_cube
+
+    @staticmethod
+    def get_default_cube_config() -> GeneralMemCubeConfig | None:
+        """Get default cube configuration for product initialization.
+
+        Returns:
+            GeneralMemCubeConfig | None: Default cube configuration if enabled, None otherwise.
+        """
+        if not APIConfig.is_default_cube_config_enabled():
+            return None
+
+        openai_config = APIConfig.get_openai_config()
+        neo4j_config = APIConfig.get_neo4j_config()
+
+        return GeneralMemCubeConfig.model_validate(
+            {
+                "user_id": "default",
+                "cube_id": "default_cube",
+                "text_mem": {
+                    "backend": "tree_text",
+                    "config": {
+                        "extractor_llm": {"backend": "openai", "config": openai_config},
+                        "dispatcher_llm": {"backend": "openai", "config": openai_config},
+                        "graph_db": {
+                            "backend": "neo4j",
+                            "config": neo4j_config,
+                        },
+                        "embedder": {
+                            "backend": "ollama",
+                            "config": {
+                                "model_name_or_path": "nomic-embed-text:latest",
+                                "api_base": os.getenv("OLLAMA_API_BASE", "http://localhost:11434"),
+                            },
+                        },
+                        "reorganize": os.getenv("MOS_ENABLE_REORGANIZE", "false").lower() == "true",
+                    },
+                },
+                "act_mem": {}
+                if os.getenv("ENABLE_ACTIVATION_MEMORY", "false").lower() == "false"
+                else APIConfig.get_activation_vllm_config(),
+                "para_mem": {},
+            }
+        )

src/memos/api/routers/product_router.py

@@ -41,7 +41,13 @@ def get_mos_product_instance():
         from memos.configs.mem_os import MOSConfig
 
         mos_config = MOSConfig(**default_config)
-        MOS_PRODUCT_INSTANCE = MOSProduct(default_config=mos_config)
+
+        # Get default cube config from APIConfig (may be None if disabled)
+        default_cube_config = APIConfig.get_default_cube_config()
+        print("*********default_cube_config*********", default_cube_config)
+        MOS_PRODUCT_INSTANCE = MOSProduct(
+            default_config=mos_config, default_cube_config=default_cube_config
+        )
         logger.info("MOSProduct instance created successfully with inheritance architecture")
     return MOS_PRODUCT_INSTANCE
 
@@ -68,6 +74,7 @@ async def register_user(user_req: UserRegisterRequest):
         logger.info(f"user_config: {user_config.model_dump(mode='json')}")
         logger.info(f"default_mem_cube: {default_mem_cube.config.model_dump(mode='json')}")
         mos_product = get_mos_product_instance()
+
         # Register user with default config and mem cube
         result = mos_product.user_register(
             user_id=user_req.user_id,

src/memos/mem_cube/general.py

@@ -7,7 +7,7 @@
 from memos.exceptions import ConfigurationError, MemCubeError
 from memos.log import get_logger
 from memos.mem_cube.base import BaseMemCube
-from memos.mem_cube.utils import download_repo
+from memos.mem_cube.utils import download_repo, merge_config_with_default
 from memos.memories.activation.base import BaseActMemory
 from memos.memories.factory import MemoryFactory
 from memos.memories.parametric.base import BaseParaMemory
@@ -114,20 +114,30 @@ def dump(
 
     @staticmethod
     def init_from_dir(
-        dir: str, memory_types: list[Literal["text_mem", "act_mem", "para_mem"]] | None = None
+        dir: str,
+        memory_types: list[Literal["text_mem", "act_mem", "para_mem"]] | None = None,
+        default_config: GeneralMemCubeConfig | None = None,
     ) -> "GeneralMemCube":
         """Create a MemCube instance from a MemCube directory.
 
         Args:
             dir (str): The directory containing the memory files.
             memory_types (list[str], optional): List of memory types to load.
                 If None, loads all available memory types.
+            default_config (GeneralMemCubeConfig, optional): Default configuration to merge with existing config.
+                If provided, will merge general settings while preserving critical user-specific fields.
 
         Returns:
             MemCube: An instance of MemCube loaded with memories from the specified directory.
         """
         config_path = os.path.join(dir, "config.json")
         config = GeneralMemCubeConfig.from_json_file(config_path)
+
+        # Merge with default config if provided
+        if default_config is not None:
+            config = merge_config_with_default(config, default_config)
+            logger.info(f"Applied default config to cube {config.cube_id}")
+
         mem_cube = GeneralMemCube(config)
         mem_cube.load(dir, memory_types)
         return mem_cube
@@ -137,6 +147,7 @@ def init_from_remote_repo(
         cube_id: str,
         base_url: str = "https://huggingface.co/datasets",
         memory_types: list[Literal["text_mem", "act_mem", "para_mem"]] | None = None,
+        default_config: GeneralMemCubeConfig | None = None,
     ) -> "GeneralMemCube":
         """Create a MemCube instance from a remote repository.
 
@@ -145,12 +156,13 @@ def init_from_remote_repo(
             base_url (str): The base URL of the remote repository.
             memory_types (list[str], optional): List of memory types to load.
                 If None, loads all available memory types.
+            default_config (GeneralMemCubeConfig, optional): Default configuration to merge with existing config.
 
         Returns:
             MemCube: An instance of MemCube loaded with memories from the specified remote repository.
         """
         dir = download_repo(cube_id, base_url)
-        return GeneralMemCube.init_from_dir(dir, memory_types)
+        return GeneralMemCube.init_from_dir(dir, memory_types, default_config)
 
     @property
     def text_mem(self) -> "BaseTextMemory | None":

src/memos/mem_cube/utils.py

@@ -1,6 +1,15 @@
+import copy
+import logging
 import subprocess
 import tempfile
 
+from typing import Any
+
+from memos.configs.mem_cube import GeneralMemCubeConfig
+
+
+logger = logging.getLogger(__name__)
+
 
 def download_repo(repo: str, base_url: str, dir: str | None = None) -> str:
     """Download a repository from a remote source.
@@ -22,3 +31,96 @@ def download_repo(repo: str, base_url: str, dir: str | None = None) -> str:
     subprocess.run(["git", "clone", repo_url, dir], check=True)
 
     return dir
+
+
+def merge_config_with_default(
+    existing_config: GeneralMemCubeConfig, default_config: GeneralMemCubeConfig
+) -> GeneralMemCubeConfig:
+    """
+    Merge existing cube config with default config, preserving critical fields.
+
+    This method updates general configuration fields (like API keys, model parameters)
+    while preserving critical user-specific fields (like user_id, cube_id, graph_db settings).
+
+    Args:
+        existing_config (GeneralMemCubeConfig): The existing cube configuration loaded from file
+        default_config (GeneralMemCubeConfig): The default configuration to merge from
+
+    Returns:
+        GeneralMemCubeConfig: Merged configuration
+    """
+
+    def deep_merge_dicts(
+        existing: dict[str, Any], default: dict[str, Any], preserve_keys: set[str] | None = None
+    ) -> dict[str, Any]:
+        """Recursively merge dictionaries, preserving specified keys from existing dict."""
+        if preserve_keys is None:
+            preserve_keys = set()
+
+        result = copy.deepcopy(existing)
+
+        for key, default_value in default.items():
+            if key in preserve_keys:
+                # Preserve existing value for critical keys
+                continue
+
+            if key in result and isinstance(result[key], dict) and isinstance(default_value, dict):
+                # Recursively merge nested dictionaries
+                result[key] = deep_merge_dicts(result[key], default_value, preserve_keys)
+            elif key not in result or result[key] is None:
+                # Use default value if key doesn't exist or is None
+                result[key] = copy.deepcopy(default_value)
+            # For non-dict values, keep existing value unless it's None
+
+        return result
+
+    # Convert configs to dictionaries
+    existing_dict = existing_config.model_dump(mode="json")
+    default_dict = default_config.model_dump(mode="json")
+
+    # Merge text_mem config
+    if "text_mem" in existing_dict and "text_mem" in default_dict:
+        existing_text_config = existing_dict["text_mem"].get("config", {})
+        default_text_config = default_dict["text_mem"].get("config", {})
+
+        # Handle nested graph_db config specially
+        if "graph_db" in existing_text_config and "graph_db" in default_text_config:
+            existing_graph_config = existing_text_config["graph_db"].get("config", {})
+            default_graph_config = default_text_config["graph_db"].get("config", {})
+
+            # Merge graph_db config, preserving critical keys
+            merged_graph_config = deep_merge_dicts(
+                existing_graph_config,
+                default_graph_config,
+                preserve_keys={"uri", "user", "password", "db_name", "auto_create"},
+            )
+
+            # Update the configs
+            existing_text_config["graph_db"]["config"] = merged_graph_config
+            default_text_config["graph_db"]["config"] = merged_graph_config
+
+        # Merge other text_mem config fields
+        merged_text_config = deep_merge_dicts(existing_text_config, default_text_config)
+        existing_dict["text_mem"]["config"] = merged_text_config
+
+    # Merge act_mem config
+    if "act_mem" in existing_dict and "act_mem" in default_dict:
+        existing_act_config = existing_dict["act_mem"].get("config", {})
+        default_act_config = default_dict["act_mem"].get("config", {})
+        merged_act_config = deep_merge_dicts(existing_act_config, default_act_config)
+        existing_dict["act_mem"]["config"] = merged_act_config
+
+    # Merge para_mem config
+    if "para_mem" in existing_dict and "para_mem" in default_dict:
+        existing_para_config = existing_dict["para_mem"].get("config", {})
+        default_para_config = default_dict["para_mem"].get("config", {})
+        merged_para_config = deep_merge_dicts(existing_para_config, default_para_config)
+        existing_dict["para_mem"]["config"] = merged_para_config
+
+    # Create new config from merged dictionary
+    merged_config = GeneralMemCubeConfig.model_validate(existing_dict)
+    logger.info(
+        f"Merged cube config for user {merged_config.user_id}, cube {merged_config.cube_id}"
+    )
+
+    return merged_config