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HomeDocsClaude Documentation 30 Oct 2026
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MCP, plugins, skills, and hooks changedthird-party/claude-desktop/extensions

Nearest release: v2.1.314, published 17 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 30 Oct 2026 17:36 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 30 Oct 2026 17:37 UTC.

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163163Put plugin content directly in the marketplace repository with a relative `source` path. When Claude Desktop syncs the marketplace, it doesn't fetch or auto-install a plugin whose `source` points at a different repository, and that plugin doesn't appear in the [**Organization** tab](#plugin-marketplaces-admin). Git submodules aren't fetched either, so a plugin folder added as a submodule is empty on users' devices.
164164 
165The marketplace `name` must match `^[A-Za-z0-9][A-Za-z0-9._-]{0,127}$` and must not be one of the reserved values `unknown`, `org`, or `org-provisioned`.
165The marketplace `name` must match `^[A-Za-z0-9]([A-Za-z0-9._-]{0,126}[A-Za-z0-9_-])?$` and must not be one of the reserved values `unknown`, `org`, or `org-provisioned`.
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167167### Host the marketplace over HTTPS instead of git
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461461End users cannot add remote MCP servers from the app's settings or install desktop extension files (`.mcpb`) themselves. Remote servers come from admin-provisioned `managedMcpServers`, from organization plugins, and from other plugins that bundle them, including plugins users install. If a marketplace plugin or a user-added plugin bundles a remote MCP server that requires OAuth sign-in, Claude can't use that server in Cowork sessions or Chat conversations. To make it available there, add a `managedMcpServers` entry with the same `url`, as described under [Remote MCP servers in plugins](#remote-mcp-servers-in-plugins). A Code session can also load the servers a user defines in Claude Code's own configuration (`~/.claude.json`, a project's `.mcp.json`, or `claude mcp add`). To limit plugin-bundled servers, see [Controlling user extensions](#controlling-user-extensions). To limit the servers a Code session loads, see [Applied as managed policy](https://claude.com/docs/third-party/claude-desktop/code.md#applied-as-managed-policy).
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463463User-added extensions are stored in the user's [local data directory](https://claude.com/docs/third-party/claude-desktop/data-storage.md) and apply only to that device.
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465> [!NOTE]
466>
467> If a user adds a marketplace themselves and the **Add marketplace** dialog shows "This marketplace could not be accessed. Private repositories are only supported using the GitHub owner/repo format.", the marketplace's host refused access. To give users the plugins of a private marketplace, add it to [`allowedPluginMarketplaces`](#configure-the-marketplace) with a [marketplace credential](#marketplace-credentials).
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465469Claude Desktop keeps its own record of the skills each user creates or uploads, and it removes a skill folder that the record doesn't list. To deliver skills to users, use [organization plugins](#organization-plugins-admin) or a [plugin marketplace](#plugin-marketplaces-admin).
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