Installing plugins from a specific branch or tag #1296
Description
Describe the feature or problem you'd like to solve
Add support to the /plugin commands for installing plugins from a specific branch or tag of a github repo
Proposed solution
Currently there is support for installing plugins or configuring marketplaces based on git repos using the simple owner/repo syntax. In the case of plugins they can be installed from a particular folder as well using owner/repo:path/to/plugin.
It would be nice to be able to specify a branch or tag as well. I believe the marketplace spec already supports a ref field for specifying the branch or tag. But that is not exposed to the command and isn't relevant for the direct plugin install scenario either.
One option would be to support @{ref} in the syntax, so you could end up with something like owner/repo@branch:path/to/plugin or owner/repo:path/to/plugin@branch. Though those might conflict with the plugin@marketplace syntax, at least visually, if not syntactically.
Example prompts or workflows
/plugin marketplace add owner/repo@feature-branch
/plugin install plugin@marketplace
or
/plugin install owner/repo@feature-branch
Additional context
It looks like the spec for marketplace also supports sha for a specific commit as well. I don't specifically have that need now, but for completeness that could be a part of it.