diff --git a/docs/config.md b/docs/config.md
new file mode 100644
index 0000000..9f410cc
--- /dev/null
+++ b/docs/config.md
@@ -0,0 +1,43 @@
+
+
+## Environment vars
+
+
+* `IDM_DEBUG`:
+    * Type: Bool
+    * Desc: Set true for shell debugging
+
+### Core Config
+
+* `IDM_BIN`:
+    * Type: String/Path
+    * desc: Path of the idmgr executable script
+* `IDM_DIR_ROOT`:
+    * Type: String/Path
+    * desc: Path of the idmgr code/library path
+
+* `IDM_NO_BG`:
+    * Type: Bool
+    * Default: false
+    * Desc: Disable background service start
+    * Note: Will not start ssh-agent or other services ...
+
+* `IDM_DISABLE_AUTO`:
+    * Default: ''
+    * Type: Words
+    * Desc: Disable some module components
+    * Example:
+        * `IDM_DISABLE_AUTO+=" git__enable git__disable git__kill "`
+        * `IDM_DISABLE_AUTO+="ps1__ls"`
+
+### Id
+
+* `IDM_LAST_ID_SAVE`:
+    * Type: Bool
+    * Default: true
+    * desc: Should the last loaded ID saved
+
+* `IDM_LAST_ID_AUTOLOAD`:
+    * Type: Bool
+    * Default: true
+    * desc: Should the last saved ID should be enabled at shell startup