feat: add skill and assistant knowledge bases

offline-backend-20260512/backend/packages/harness/deerflow/config/llmwiki_config.py

@@ -44,6 +44,7 @@ class WeKnoraConnectionConfig(BaseModel):
         repr=False,
         description=("Optional WeKnora administrator password used by DeerFlow's server-side WeKnora API client and detail-page iframe proxy. Prefer $ENV references."),
     )
+    graph: WeKnoraDirectGraphConfig = Field(default_factory=lambda: WeKnoraDirectGraphConfig())
     model_config = ConfigDict(extra="ignore")
 
     @field_validator("api_base_url", "web_base_url")
@@ -52,6 +53,23 @@ class WeKnoraConnectionConfig(BaseModel):
         return normalize_service_url(value)
 
 
+class WeKnoraDirectGraphConfig(BaseModel):
+    """Backend-only, opt-in Neo4j transactional HTTP writer settings."""
+
+    direct_write_enabled: bool = False
+    neo4j_http_url: str = ""
+    username: str = ""
+    password: str = Field(default="", repr=False)
+    database: str = Field(default="neo4j", pattern=r"^[A-Za-z0-9_.-]+$")
+    timeout_seconds: float = Field(default=30, gt=0, le=300)
+    model_config = ConfigDict(extra="ignore")
+
+    @field_validator("neo4j_http_url")
+    @classmethod
+    def _validate_url(cls, value: str) -> str:
+        return normalize_service_url(value)
+
+
 class LocalWikiEmbeddingConfig(BaseModel):
     enabled: bool = True
     provider: str = "openai"