#! expect: { "n": 5, "yesterday": "2026-06-14T12:00:00.000Z", "encoded": "{\"n\":5}" }
payload = data.payload()
parsed = json.parse(payload.body)
t = time.parse(parsed.when)
return {
n: parsed.n,
yesterday: time.format(t - 86400000),
encoded: json.encode({ n: parsed.n })
}