SlotKit

1.0.0

SlotKit is MenuKit: Containers renamed, plus the slot code MenuKit 6 carried. It has its own version number and needs MenuKit 7.0.0 or newer, below 8.0.0. Mods built for Containers or for MenuKit 6's slot code need an update. The upgrading guide has the steps and an import map that rewrites the moved names.

Renamed

• The mod id menukit-containers is slotkit, and com.trevlar.menukit.containers.api.* is com.trevlar.slotkit.api.*.
• SlotGroup, the created kind, is CreatedSlotGroup. ContainerKeys.MENDING is BehaviorKeys.MENDING, and ContainerKeys is gone.

Moved in from MenuKit

• Slot groups, categories and sets (api.group), Storage and VirtualStorage (api.storage), the window, addresses, slot operations, gates and vetoes (api.window), and SlotGroupPanelAdapter.

Changed

• A server no longer refuses every player without SlotKit. It refuses only players missing SlotKit or a mod that declares "bothSides": "required", and names the mods with links. Everyone else joins.
• A mod that builds slots or custom menus declares required, and namespaces its panel and menu ids with its own mod id. ContainerPanel.define and CustomMenu.define throw at startup otherwise, with a message naming the fix.
• The join check also compares each required mod's ContainerPanel slot groups and slot counts, and refuses a player whose copy differs, naming the mod.
• Slot state carried on a shulker box is kept in minecraft:custom_data and stays off the network. Shulkers saved with Containers keep their contents and state.

Added

• Presence answers what the other side runs: serverHasSlotKit, serverHas and serverHasChannel on the client, clientHasSlotKit and clientHas on the server.

Removed

• Address.panel and Address.panelElement, the window's panel and element handles, and the VISIBILITY and OPACITY keys. A panel's own visibleWhen and opaque do the job.

Unchanged

• Every saved id keeps its menukit: namespace. Worlds, player files and a mod's saved settings load with no conversion.