Catch security issues as Claude writes code changedsecurity-guidance
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Upstream edited this page at 24 Sep 2026 23:46 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 25 Sep 2026 00:07 UTC.
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1717
1818## Install the plugin
1919
20In a terminal Claude Code session, install from the [official Anthropic marketplace](/docs/en/discover-plugins#official-anthropic-marketplace):
20In a terminal Claude Code session, install from the [official Anthropic marketplace](/docs/en/plugins/anthropic-marketplaces):
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2222```text theme={null}
2323/plugin install security-guidance@claude-plugins-official
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2828* **Claude desktop app, local or SSH session**: open the [plugin browser](/docs/en/desktop#install-plugins) by clicking the **+** button next to the prompt, then **Plugins**, then **Add plugin**
2929* **VS Code extension**: install from the [**Manage plugins** dialog](/docs/en/vs-code#manage-plugins)
30* **Cloud sessions**: enable the plugin for your claude.ai account so Claude Code loads it as a [synced plugin](/docs/en/plugins-reference#synced-plugins). A cloud session doesn't load plugins from your user settings or from the repository's `.claude/settings.json`, as [What carries over from your setup](/docs/en/cloud-environments#what-carries-over-from-your-setup) explains
30* **Cloud sessions**: a cloud session doesn't load plugins from your user settings or from the repository's `.claude/settings.json`, as [What carries over from your setup](/docs/en/cloud-environments#what-carries-over-from-your-setup) explains. For plugins your organization distributes through managed settings, see [Manage plugins for your organization](/docs/en/plugins/org)
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3232The terminal install prompts for a scope. Choose user scope to write the plugin to your user settings, so it loads in every new local session you start on this machine.
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3434If the install fails, match the message Claude Code reports:
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3636* `Marketplace "claude-plugins-official" not found`: add the marketplace with `/plugin marketplace add anthropics/claude-plugins-official`, then retry the install.
37* The plugin is [not found in the marketplace](/docs/en/discover-plugins#install-plugins): check the plugin name.
37* The plugin is [not found in the marketplace](/docs/en/plugins/install#install-a-plugin): check the plugin name.
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39Check the install summary. If it reports `Run /reload-plugins to activate.`, see [Apply plugin changes without restarting](/docs/en/discover-plugins#apply-plugin-changes-without-restarting) to activate the plugin in your current session.
39Check the install summary. If it reports `Run /reload-plugins to activate.`, see [Apply plugin changes without restarting](/docs/en/plugins/cli-reference#reload-plugins) to activate the plugin in your current session.
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4141### Enable for your team in local sessions
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239239
240240* [Code Review](/docs/en/code-review): set up the PR-time multi-agent review
241241* [Automate actions with hooks](/docs/en/hooks-guide): build your own checks at the same lifecycle points
242* [Discover and install plugins](/docs/en/discover-plugins#official-anthropic-marketplace): browse other official plugins
242* [Find plugins in the official marketplace](/docs/en/plugins/anthropic-marketplaces#find-plugins-in-the-official-marketplace): where to browse the other official plugins
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