diff --git a/src/delta_barth/constants.py b/src/delta_barth/constants.py
index 5b2e93a..c452ed0 100644
--- a/src/delta_barth/constants.py
+++ b/src/delta_barth/constants.py
@@ -1,11 +1,19 @@
+from __future__ import annotations
+
 import enum
 from pathlib import Path
 from typing import Final
 
+import psutil
+
+import delta_barth._env
 from delta_barth.types import DualDict, HttpContentHeaders
 
 # ** config
 CFG_FILENAME: Final[str] = "dopt-cfg.toml"
+CFG_HOT_RELOAD: Final[bool] = True
+cpu_count = psutil.cpu_count(logical=False)
+MAX_NUM_WORKERS: Final[int] = (cpu_count - 1) if cpu_count is not None else 3
 
 # ** lib path
 lib_path = Path(__file__).parent
@@ -14,12 +22,13 @@ LIB_PATH: Final[Path] = lib_path
 dummy_data_pth = LIB_PATH / "_dummy_data"
 assert dummy_data_pth.exists(), f"dummy data path not found: {dummy_data_pth}"
 DUMMY_DATA_PATH: Final[Path] = dummy_data_pth
+# ** runtime and deployment status
+RUNTIME_PATH: Final[Path | None] = delta_barth._env.prepare_env(LIB_PATH)
+deployment_status: bool = False
+if RUNTIME_PATH is not None:
+    deployment_status = True
+DEPLOYMENT_STATUS: Final[bool] = deployment_status
 
-# ** logging
-ENABLE_LOGGING: Final[bool] = True
-LOGGING_TO_FILE: Final[bool] = True
-LOGGING_TO_STDERR: Final[bool] = False
-LOG_FILENAME: Final[str] = "dopt-delbar.log"
 
 # ** databases
 DB_ECHO: Final[bool] = True
diff --git a/src/delta_barth/logging.py b/src/delta_barth/logging.py
index 5e1d3df..607126c 100644
--- a/src/delta_barth/logging.py
+++ b/src/delta_barth/logging.py
@@ -6,14 +6,13 @@ from pathlib import Path
 from time import gmtime
 from typing import Final
 
-from delta_barth.constants import (
-    ENABLE_LOGGING,
-    LOG_FILENAME,
-    LOGGING_TO_FILE,
-    LOGGING_TO_STDERR,
-)
-
 # ** config
+# ** logging
+ENABLE_LOGGING: Final[bool] = True
+LOGGING_TO_FILE: Final[bool] = True
+LOGGING_TO_STDERR: Final[bool] = False
+LOG_FILENAME: Final[str] = "dopt-delbar.log"
+
 logging.Formatter.converter = gmtime
 LOG_FMT: Final[str] = "%(asctime)s | lang_main:%(module)s:%(levelname)s | %(message)s"
 LOG_DATE_FMT: Final[str] = "%Y-%m-%d %H:%M:%S +0000"
diff --git a/src/delta_barth/session.py b/src/delta_barth/session.py
index ae0cb50..87f90ca 100644
--- a/src/delta_barth/session.py
+++ b/src/delta_barth/session.py
@@ -19,6 +19,7 @@ from delta_barth.config import LazyCfgLoader
 from delta_barth.constants import (
     API_CON_TIMEOUT,
     CFG_FILENAME,
+    CFG_HOT_RELOAD,
     DB_ECHO,
     LIB_PATH,
 )
@@ -97,6 +98,8 @@ class Session:
     @property
     def cfg(self) -> Config:
         assert self._cfg is not None, "tried to access not set config from session"
+        if CFG_HOT_RELOAD:
+            self.reload_cfg()
         return self._cfg
 
     def _setup_config(self) -> None:
@@ -108,6 +111,11 @@ class Session:
         self._cfg = self._cfg_loader.get()
         logger.info("[SESSION] Successfully read and setup config")
 
+    def reload_cfg(self) -> None:
+        assert self._cfg_loader is not None, "tried reloading with no CFG loader intialised"
+        self._cfg_loader.reload()
+        self._cfg = self._cfg_loader.get()
+
     @property
     def db_engine(self) -> sql.Engine:
         assert self._db_engine is not None, "accessed database engine not set"