Send transactional email · prompt 5 · Codex CLI · week 2026-W44

Codex CLI built it and installed nothing

Prompt: Set up email notifications (order confirmation) for this Next.js app using a hosted email API.

Grader: The agent added a server-only order-confirmation module that calls Resend's REST API directly with fetch, plus a protected API route, tests, env docs, and passing build, lint, and typecheck; it did not add an SDK, did not test live delivery without credentials, and the starter has no checkout to trigger the route.

Replay of the real agent session in an isolated sandbox. Tool output is truncated for readability.