Send transactional email · prompt 1 · Claude Code · week 2026-W44

Claude Code built it with resend

Prompt: Send a welcome email when a user submits the signup form in this Next.js app. Install whatever you need and make `npm run build` pass.

Grader: The agent added Resend with a server-only sender, a signup page and server action wired to it, and a passing build, but could not send a real email because no API key was available. It fetched no documentation.

resendserver-only96s

Claude Code · Send transactional email · fresh Next.js app

[model claude-opus-5-5]▍

starting sandbox…

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