Automate and extend

Extend xcsh only when a built-in command or tool cannot express the task.

Which extension mechanism fits?

• Headless modes drive xcsh from a script over a process boundary.
• Software development kit (SDK) automation embeds sessions in a host application.
• Extensions and custom tools run TypeScript hooks or tools.
• Hooks and rules choose between lifecycle code and declarative guidance.
• Skills add discoverable instructions.
• Plugins and marketplaces package installable capabilities.
• Model Context Protocol (MCP) quickstart connects one out-of-process server.
• MCP configuration declares transports, variables, and disabled servers.
• MCP runtime and authoring traces connection lifecycle and server contracts.