> For the complete documentation index, see [llms.txt](https://opuszek.gitbook.io/itemblocker/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://opuszek.gitbook.io/itemblocker/rules/groups-and-allowed.md).

# Item groups and allowed items

## Item groups

A group blocks actions for every item type matching a pattern, so one rule covers many items.

| Pattern           | Matches                                   |
| ----------------- | ----------------------------------------- |
| `*_sword`         | every sword                               |
| `netherite_*`     | every netherite item                      |
| `*shulker_box`    | every shulker box                         |
| `#swords`         | the Minecraft item tag `minecraft:swords` |
| `#minecraft:logs` | every log, through its tag                |

`*` stands for any text. Tags come from Minecraft and data packs, so a group follows them when a data pack adds items.

```
/ib group add <pattern> [actions:...] [worlds:...] [bypass:...] [in:preset]
/ib group remove <pattern> [in:preset]
/ib group list [in:preset]
```

```
/ib group add *_sword actions:use in:pvp
/ib group add #logs actions:place
```

A new group blocks every action until you say otherwise. In the menu, open a preset, then **Item groups**, and click the add button to type a pattern.

## Allowed items

Allowed items are never blocked by the preset's item rules and groups. Together with a group, they block a whole category except a few items:

```
/ib group add *_sword actions:use in:pvp
/ib allow add wooden_sword in:pvp
/ib allow add stone_sword in:pvp
```

```
/ib allow add <item|hand> [in:preset]
/ib allow remove <item|hand> [in:preset]
/ib allow list [in:preset]
```

Allowing only affects the preset it is in. [Filters](/itemblocker/rules/filters.md) still apply to allowed items, because they target specific items on purpose.

In the menu, open a preset, then **Allowed items**, and click an item in your own inventory or search for one.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://opuszek.gitbook.io/itemblocker/rules/groups-and-allowed.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.