[BUG] M`/plugin marketplace update` + `/reload-plugins` does not pick up pushed plugin changes

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

/plugin marketplace update <marketplace> reports success ("Updated 1 marketplace"), even if an installed plugin is not updated. That is, subsequent /reload-plugins keep loading the old version. The only way I found to pick up pushed changes is a full reinstall (uninstall -> marketplace update -> install -> reload). Maybe this is intended behavior but it was confusing.. I had anticipated that the update would also update my package.

What Should Happen?

After /plugin marketplace update, a /reload-plugins should load the updated plugin. I.e., the refresh should propagate to the installed plugin. (Or, if a reinstall is required by design, could /plugin marketplace update report a less definitive "success"?)

Error Messages/Logs

Steps to Reproduce

1. Add a GitHub-backed marketplace: /plugin marketplace add <owner>/<repo>
2. Install and load it: /plugin install <plugin>@<marketplace>, then /reload-plugins
3. Push a change to the plugin in its GitHub repo (edit a command/file, commit, push)
4. Run /plugin marketplace update <marketplace> - it prints "Updated 1 marketplace"
5. Run /reload-plugins
6. Observe: the plugin still runs the old version - the pushed change is absent
7. Run /plugin uninstall <plugin>@<marketplace> -> /plugin marketplace update <marketplace> -> /plugin install <plugin>@<marketplace> -> /reload-plugins - only now does the change appear

(Observed with the marketplace and plugin both named repo-review, from
github.com/natemacfadden/repo-review.)

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.195 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_