---
type: User Story
title: "US-018: Control Pocket Base mob spawning"
description: Let Pocket Base owners control hostile and passive natural mob spawning independently in their private world, with both disabled by default.
status: done
---

# US-018: Control Pocket Base mob spawning

As a **Pocket Base owner**, I want to enable or disable hostile and passive natural mob spawning independently in my Pocket Base so that I can choose which kinds of normal mob activity its private world supports.

## Acceptance criteria

- [x] Hostile and passive natural mob spawning are both disabled by default in every new Pocket Base and in existing Pocket Bases that have no saved preference.
- [x] A Pocket Base owner can use `/basesettings pocket mobs hostile enable|disable` to control hostile natural mob spawning in their own Pocket Base.
- [x] A Pocket Base owner can use `/basesettings pocket mobs passive enable|disable` to control passive natural mob spawning in their own Pocket Base.
- [x] Changing one mob category does not change the other category.
- [x] The commands are unavailable until Pocket Base I is unlocked.
- [x] The commands, categories, and modes are offered through contextual autocomplete.
- [x] `/basesettings status` displays the current hostile and passive Pocket Base mob-spawning settings.
- [x] Both preferences persist across restarts and are reapplied when the Pocket Base world loads.
- [x] Existing saved `mob-spawning-enabled` values migrate to both category preferences, preserving prior behavior.
- [x] Disabling either natural-spawning category does not remove existing mobs or prevent explicitly spawned or summoned mobs.
- [x] Persistence or world-application failures produce a clear failure message, restore both prior world flags, and do not report a successful change.

## Related

- [US-015: Unlock a Pocket Base](us-015-unlock-a-pocket-base.md)
- [US-016: Build and use Pocket Base portals](us-016-build-and-use-pocket-base-portals.md)
- [US-017: Expand a Pocket Base](us-017-expand-a-pocket-base.md)
- [US-019: Change a Pocket Base biome](us-019-change-a-pocket-base-biome.md)