blueprint-cloudflare-data git:20260929.eb2c293A

Immutable. This exact content never changes and is served at /api/v1/blob/1c1104f3dfef265f.

---
name: blueprint-cloudflare-data
description: "Turn the spec's tables into D1 migrations with tests."
---

# Data

1. One migration file per change in `migrations/` (`0001_….sql`, …), applied by wrangler. Primary keys, NOT NULL and
   UNIQUE as the spec's table says; foreign keys as the spec's relations say.
2. A small data-access module per table with bound statements only (`env.DB.prepare("… ?").bind(value)`).
3. `test/data.test.ts`: in the Workers runtime, every table can be written and read back, and every NOT NULL and UNIQUE
   is refused when broken.

Done when the check passes: `yarn build` and `yarn test` succeed and `test/` has the data tests.

## Always

- Read `.blueprint/spec.md` first. It is the agreed specification; do not widen it.
- When you need a decision, ask it through the blueprint question tool and stop. Do not guess.
- Do not run `git init`: a new repository loses the folder's trust and the next unattended step stops at Claude
  Code's trust prompt. The user adds git themselves after the build if they want it.
- Say you are done by stopping; the executor runs the check. Do not claim success yourself.