Configure shared starting backpack contents from the admin menu

docs/configuration.md

@@ -351,3 +351,11 @@ Enabled/Disabled buttons and Apply fields for patrol altitude (150–500 m, defa
 (30–600 s, default 120). All save for the next round. `/esc mission plane set 0|1` uses
 the same admin authorization. No loaded addon or no safe airport means no plane.
 See [reconnaissance plane details](cessna-reconnaissance.md).
+
+## Starting backpack contents
+
+Open **Items → Starting backpack** in the admin menu. Select a loaded mod, choose **Show items**, browse its catalog pages, choose an item and save its total quantity. Saving the same item again replaces its quantity; zero or **Remove item** removes it. Weapons, matching magazines and medical supplies can be selected explicitly. The saved-content dropdown lists every selected item and its quantity.
+
+Select **Custom loadout** to use that list for the next prison or crash start. The shared field map is always included. **Default loadout** restores the existing pistol and magazine count settings without erasing your custom list. Existing backpacks are never refilled or changed by these edits. Enemy item permissions and probability weights do not change this explicit starting loadout.
+
+The list permits up to 32 different items, 48 of one item and 64 total items, plus the map. The physical backpack still has limited capacity: unavailable items and items that cannot be inserted are omitted and logged. Add matching magazines explicitly; selecting a weapon does not automatically add spare ammunition. Settings persist in the `startBackpack` section of `Escapists.json`. Older configurations keep the default loadout.