for single-root workspaces, use that folder as CWD for MCP servers

Author: Gustavo Bicalho

src/services/mcp/McpHub.ts

@@ -172,6 +172,7 @@ export class McpHub {
 					// ...(process.env.NODE_PATH ? { NODE_PATH: process.env.NODE_PATH } : {}),
 				},
 				stderr: "pipe", // necessary for stderr to be available
+				cwd: config.cwd ?? this.getDefaultCwd(),
 			})
 
 			transport.onerror = async (error) => {
@@ -266,6 +267,14 @@ export class McpHub {
 		}
 	}
 
+	private getDefaultCwd() {
+		const paths = vscode.workspace.workspaceFolders
+		if (paths?.length === 1) {
+			return paths[0].uri.fsPath
+		}
+		return undefined
+	}
+
 	private appendErrorMessage(connection: McpConnection, error: string) {
 		const newError = connection.server.error ? `${connection.server.error}\n${error}` : error
 		connection.server.error = newError //.slice(0, 800)