Copilot CLI Weekly: MCP Servers Get LLM Access

MCP Sampling Lands in v1.0.13-0 The most significant change this week is buried in a prerelease tag: MCP servers can now request LLM inference. Version 1.0.13-0, released today, adds sampling support to the Model Context Protocol implementation. MCP servers can call the user's LLM through a permission prompt, eliminating the need for servers to maintain their own API subscriptions. This is a shift in how MCP servers work. Before this, an MCP server was a tool provider — it exposed functions the agent could call, but it couldn't reason on its own. Now, with sampling, an MCP server can delegate reasoning back to the user's LLM mid-execution. A recipe generator can ask the LLM to format output. A code analysis server can ask for natural language summaries. The user approves each request via a review prompt, maintaining control over what their LLM processes. The feature has been in the MCP spec since VS Code shipped it last summer, but adoption has been slow. Copilot CLI supporting it mean