Add a Postgres database · prompt 4 · Claude Code · week 2026-W44-vercel-template

Claude Code built it and installed nothing

Prompt: Add a Postgres database to this project for persistent storage. I want to store todo items and read them back on a page.

Grader: The agent built the todo feature end to end with Node's built-in node:sqlite instead of a Postgres client: a db module, server actions, and a /todos page, with the build passing and persistence verified across a restart. It bumped @types/node to get the types and fetched no documentation.

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