Remove generated artifacts and machine-specific paths

backend/agent4/config.py

@@ -9,7 +9,6 @@ from pydantic_settings import BaseSettings, SettingsConfigDict
 
 
 AGENT4_ROOT = Path(__file__).resolve().parents[2]
-WORKSPACE_ROOT = AGENT4_ROOT.parent
 
 
 class Settings(BaseSettings):
@@ -18,11 +17,10 @@ class Settings(BaseSettings):
     port: int = 7200
 
     knowledge_framework_path: Path = AGENT4_ROOT / "data" / "knowledge" / "reducer_three_layer_framework.json"
-    legacy_knowledge_framework_path: Path = WORKSPACE_ROOT / "mechanical_knowledge_base_final" / "data" / "framework" / "reducer_three_layer_framework.json"
+    legacy_knowledge_framework_path: Path | None = None
     standard_skillflow_dirs: list[Path] = Field(
         default_factory=lambda: [
             AGENT4_ROOT / "data" / "standards",
-            WORKSPACE_ROOT / "runtime_tmp",
         ]
     )