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478478 * If you enable or disable a plugin during a session, Claude Code connects or disconnects its MCP servers when the change applies. [Apply plugin changes without restarting](/docs/en/discover-plugins#apply-plugin-changes-without-restarting) describes when that is. In a session without an interactive terminal, `/reload-plugins` doesn't connect or disconnect plugin MCP servers; those changes take effect in your next session
479479 * When you reload, Claude Code keeps the live connections of plugin servers whose configuration is unchanged, and does the same when you [replace the session's MCP server list](/docs/en/agent-sdk/typescript#mcpsetserversresult) from the Agent SDK without naming them
480480 * When you [move the session with `/cd`](/docs/en/permissions#move-the-session-to-another-directory) on v2.1.246 or later, Claude Code connects the servers of plugins the new directory's settings enable and disconnects the servers of plugins that are no longer enabled, so you don't need to run `/reload-plugins` after the move
481 * In [web sessions](/docs/en/claude-code-on-the-web), an MCP call to a plugin server that isn't connected yet, such as right after an idle session wakes, starts the server on demand and waits for it to connect
481 * In [cloud sessions](/docs/en/claude-code-on-the-web), an MCP call to a plugin server that isn't connected yet, such as right after an idle session wakes, starts the server on demand and waits for it to connect
482482* **Path placeholders**: `${CLAUDE_PLUGIN_ROOT}` resolves to the plugin's installation directory, `${CLAUDE_PLUGIN_DATA}` to its [persistent state](/docs/en/plugins-reference#persistent-data-directory) directory, and `${CLAUDE_PROJECT_DIR}` to the stable project root. Substitution applies to:
483483 * `stdio` servers: `command`, `args`, `env`
484484 * `http`, `sse`, and `ws` servers: `url`, `headers`, and `headersHelper`. Before v2.1.195, `headersHelper` passed the placeholder through as a literal string
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11481148| Where the session runs | How connectors arrive | What governs them |
11491149| :------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
11501150| Terminal, [VS Code](/docs/en/vs-code), [JetBrains](/docs/en/jetbrains), and [Agent SDK](/docs/en/agent-sdk/claude-code-features) sessions | Claude Code fetches them from claude.ai | The settings in this section and [managed MCP configuration](/docs/en/managed-mcp) |
1151| [Cloud sessions](/docs/en/claude-code-on-the-web) | The remote host passes them in | Your claude.ai organization settings, plus the [allowlist and denylist](/docs/en/managed-mcp#policy-based-control-with-allowlists-and-denylists) settings that reach the session and any `managed-mcp.json` on the host that runs it |
1151| [Cloud sessions](/docs/en/claude-code-on-the-web) | The cloud host passes them in | Your claude.ai organization settings, plus the [allowlist and denylist](/docs/en/managed-mcp#policy-based-control-with-allowlists-and-denylists) settings that reach the session and any `managed-mcp.json` on the host that runs it |
11521152| The [desktop app](/docs/en/desktop)'s local and SSH sessions | The desktop app delivers them in-process | `blocked` entries in your organization's [connector tool controls](#organization-controls-on-connector-tools) |
11531153
11541154[`disableClaudeAiConnectors`](#disable-claude-ai-connectors), `ENABLE_CLAUDEAI_MCP_SERVERS`, and [`allowAllClaudeAiMcps`](/docs/en/settings-reference#allowallclaudeaimcps) act only on the first row, the connectors Claude Code fetches itself. The other two rows differ from it in these ways: