openidea/wit/mcp.wit

package openidea:[email protected];

/// Discovery of the IDE's built-in MCP server; never exposes its URL or token.
interface mcp {
    /// Stdio bridge argv for the invoking project; none without a window/project or while off.
    stdio-command: func() -> option<list<string>>;
}

/// Optional tools declared by contributes.mcpTools, under the plugin's grants and command budget.
interface mcp-provider {
    use types.{error};
    use invocation.{invocation};
    /// Calls the declared local tool name with JSON arguments and the project's window context.
    /// Returns text; tools may encode structured data as JSON text.
    call: func(tool: string, arguments: string, ctx: borrow<invocation>) -> result<string, error>;
}