What
The periodic reminder about plugins you have not used now plainly says to disable them and why, replacing the passive suggestion to review them with /plugin. It still appears no more than once every 30 sessions.
Evidence
to free up context and speed up startup.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Names in the bundle/plugin
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added since
A small documentation edit on Create and distribute a plugin marketplace touched a line naming /plugin after this was published.
Paths resolve relative to the marketplace root, which is the directory containing `.claude-plugin/`. In the example above, `./plugins/my-plugin` points to `<repo>/plugins/my-plugin`, even though `marketplace.json` lives at `<repo>/.claude-…plugin-marketplaces see the edit
Confirmed since
Anthropic's documentation has since written up /plugin, on MCP, plugins, skills, and hooks.
| `.claude-plugin/plugin.json` | **Required.** Plugin manifest (name, description, version). Directories without this file are ignored. |third-party/claude-desktop/extensions see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up /plugin, on MCP, plugins, skills, and hooks.