snapcraft extension command does not exist
Metadata
Current evaluation
The singular snapcraft extension command was removed from the documentation; support was deferred pending a possible craft-application redesign.
Resolution: closed not a bug
Reason: Maintainer mr-cal stated that Snapcraft will not support the singular extension command in the short term and that its documentation reference was removed. A redesigned command may be introduced when extensions migrate to craft-application; no restoring PR or commit was identified.
Evaluated by: mr-cal-bot
No scores available.
Issue body
### Bug Description
The [snapcraft documentation](https://snapcraft.io/docs/snapcraft-extensions) states:
> Further information about any specific extension can be obtained by typing snapcraft extension followed by the extension name:
>
> ```
> $ snapcraft extension gnome-3-28
> This extension eases creation of snaps that integrate with GNOME 3.28
> ...
> ```
But this sub-command is missing from snapcraft 8.
### To Reproduce
```
$ snapcraft --version
snapcraft 8.4.3
$ snapcraft extensions | grep kde-neon
kde-neon core18, core20, core22
kde-neon-6 core22
$ snapcraft extension kde-neon-6
Usage: snapcraft [options] command [args]...
Try 'snapcraft -h' for help.
Error: no such command 'extension', maybe you meant 'extensions', 'list-extensions' or 'expand-extensions'
```
### Environment
Ubuntu 24.04 LTS, snapcraft 8.4.3
### snapcraft.yaml
```yaml
n/a
```
### Relevant log output
```shell
See reproduction section above.
```
### Additional context
n/a
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| stealth/space-bunny-alpha | — | closed not a bug | The singular snapcraft extension command was removed from the documentation; support was deferred pending a possible craft-application redesign. | |
| stealth/space-bunny-alpha | — | closed not a bug | Rejected: Snapcraft will not support the singular `extension` command short term. Maintainer removed its documentation reference; a redesigned command may follow the extensions-to-craft-application migration. | |
| qwen/qwen3.6-35b-a3b | — | — | The snapcraft extension command is not supported in the short term. Documentation was updated to remove it, with a potential improved version planned for the craft-application migration. Closed as rejected. | |
| qwen/qwen3.6-35b-a3b | — | — | The extension subcommand was rejected and removed from documentation. Maintainers will not support it short-term but may reintroduce an improved version after migrating extensions to craft-application. | |
| qwen3.6-35b-a3b-mtp-q6 | — | — | Rejected and dropped from documentation. Maintainers will not support the command short-term but may introduce an improved version during the craft-application migration. |
Update history
No update history recorded yet.
Related issues
| Issue | Project | State | Summary | Similarity |
|---|---|---|---|---|
| #1986634 "snapcraft extension" does not recognize core22 extensions | snapcraft (launchpad) | closed | Obsolete after commit 3623601d7 removed the deprecated singular snapcraft extension command; core22 lookup was never repaired. | |
| #4339 "snapcraft extension" does not recognize core22 extensions | snapcraft | closed | Core22 extension lookup was never fixed; the issue became obsolete after Snapcraft removed the `extension` command. No resolving PR or commit was identified. |