Function exists

packages/core/test/tool-apply-patch.test.ts:123–129

(target: string)

})

const exists = (target: string) =>
  Effect.promise(() =>
    fs.stat(target).then(
      () => true,
      () => false,
    ),
  )
const it = testEffect(Layer.empty)

describe("ApplyPatchTool", () => {