Add error monitoring · prompt 5 · Claude Code · week 2026-W44

Claude Code built it with @vercel/otel

Prompt: Instrument this Next.js app with error and performance monitoring suitable for a serverless deployment.

Grader: The agent chose Vercel's own tooling (@vercel/otel, @vercel/speed-insights, @vercel/analytics), wired instrumentation, layout components, error boundaries and a client-error endpoint, fixed a peer-dependency conflict by pinning @opentelemetry/api, and passed build, typecheck and lint, with a local runtime check of the endpoint.

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