Plugins reference changedplugins-reference
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722722`${CLAUDE_PLUGIN_ROOT}` changes when the plugin updates. The previous version's directory remains on disk for a grace period after an update, but treat it as ephemeral and don't write state there. See [plugin caching](#plugin-caching-and-file-resolution) for cleanup semantics.
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724When a plugin updates mid-session, hook commands, monitors, MCP servers, and LSP servers keep using the previous version's path. Run `/reload-plugins` to switch hooks, MCP servers, and LSP servers to the new path; monitors require a session restart. For a plugin with a `command` source, Claude Code [can reload the plugin itself](/docs/en/plugin-marketplaces#when-claude-code-re-runs-the-command).
724When a plugin updates mid-session, hook commands, monitors, MCP servers, and LSP servers keep using the previous version's path. Run `/reload-plugins` to switch hooks, MCP servers, and LSP servers to the new path; monitors require a session restart. In a session without an interactive terminal, the reload leaves plugin MCP servers on the old path until the next session.
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726For a plugin with a `command` source, Claude Code [can reload the plugin itself](/docs/en/plugin-marketplaces#when-claude-code-re-runs-the-command).
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726728MCP servers can also call the `roots/list` request to read the session's working directories at runtime. See [what `roots/list` returns and when Claude Code notifies the server of changes](/docs/en/mcp#option-3-add-a-local-stdio-server).
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