// Cross-target: the MCP surface — connect with fully headless OAuth (DCR →// consent → code → token) and run code in the sandbox, exactly as an MCP// client (Claude, Cursor, …) would.import { expect } from "@effect/vitest";import { Effect } from "effect"; import { scenario } from "../src/scenario";import { Mcp, Target } from "../src/services"; scenario(  "MCP · OAuth connect, then execute code in the sandbox",  {},  Effect.gen(function* () {    const target = yield* Target;    const mcp = yield* Mcp;    const identity = yield* target.newIdentity();    const session = mcp.session(identity);     const tools = yield* session.listTools();    expect(tools, "the execute tool is advertised").toContain("execute");     const result = yield* session.call("execute", { code: "return 6 * 7;" });    expect(result.text, "the sandbox returns the value").toBe("42");  }),);