Function apiError

packages/ai-sandbox-vercel/tests/vercel.test.ts:12–16

(status: number, body?: unknown, message = '')

// as success while still surfacing real failures.
describe('isDirAlreadyExistsError', () => {
  const apiError = (status: number, body?: unknown, message = '') =>
    new APIError(new Response(null, { status }), {
      message,
      json: body,
    })

  it('matches a 400 with an EEXIST-style message in the json body', () => {
    const err = apiError(400, {