> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agentvolumes.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Reserved extension namespaces

> Reserved Agent Volumes extension namespace keys for capability metadata and bridge migration checks.

The reserved extension namespace set is version-aligned with Agent Volumes `v0.1.0-rc.1` and published by `schemas/reserved-extension-namespaces.json`.

| Namespace       | Meaning                                               |
| --------------- | ----------------------------------------------------- |
| `agent-volumes` | Reserved for Agent Volumes-owned extension semantics. |
| `core`          | Reserved for Agent Volumes-owned extension semantics. |
| `spec`          | Reserved for Agent Volumes-owned extension semantics. |

Adding a reserved namespace is a breaking change for the relevant release line because existing extension keys can become spec-owned-looking keys.

## Canonical artifact

```text theme={null}
https://agentvolumes.org/spec/0.1.0-rc.1/schemas/reserved-extension-namespaces.json
```

## Related sources

* [Schema ID publication pages](/spec/0.1.0-rc.1/uri-publications/schema-ids)
* [Schema artifact inventory](/spec/0.1.0-rc.1/conformance/schema-artifacts)
* [Capability metadata API](/spec/0.1.0-rc.1/api/capabilities)