# Roadmap

> What isn’t there yet, and why some of it matters.

What Arca doesn’t do yet and, where it matters, why.

## Available

7z listing/extraction (including solid and encrypted headers), Store/LZMA2
creation, passwords and hidden names are implemented for CLI and desktop. See
[issue #2](https://github.com/beyondhumane/arca/issues/2) and the
[accepted design](https://github.com/beyondhumane/arca/blob/main/docs/plans/7z-format.md).

[RAR/CBR reading](rar.md) is enabled by default, including modern and legacy
multivolume sets, passwords, previews and verified extraction. New single-volume
RAR5 archives can be created at four levels. Existing RAR/CBR archives remain
read-only: mutation, recovery/repair, encrypted, solid or multivolume output and
CBR creation are not supported.

Standalone `.xz` and `.tar.xz`/`.txz` can be created, listed, tested and
extracted in CLI and desktop. See
[issue #18](https://github.com/beyondhumane/arca/issues/18) and
[Creating archives](creating-archives.md#xz).

## Not yet

- **UDF:** ISO images are read through ISO 9660, so files stored only in UDF (such as `install.wim` on Windows media) are not listed yet.
- **Symbolic links:** skipped for ZIP/TAR creation, rejected for 7z.
- **GNU tar long names.**
- **Solid 7z creation:** existing solid archives can be read, but new ones use independent blocks.
- **7z password changes and mutation:** adding, deleting and renaming can require solid-block rewrites and are out of scope.
- **Desktop integration on Linux and macOS:** the Explorer menu is Windows-only for now.
- **Mutation outside ZIP:** ZIP desktop editing exists; 7z remains create/read only.
- **A native format:** at which point Zstandard becomes the default codec.

> [!TIP]
> **Want to help?**
>
> Pick an item, open an issue to discuss the approach, and send a pull request. See [Contributing](contributing.md).