# Seed Data Plan

Seed data exists only to make the local developer experience and Codex implementation deterministic.

## Seed data rules

- Seed data must be clearly labeled as demo or fixture data.
- Seed data must never be presented as real GRB, OSM or official source data unless it actually comes from that source.
- Fixture geometries should be small and simple.
- Fixtures should support automated tests.

## Required seed entities

### Project

```json
{
  "name": "Demo — Geel Building QA",
  "description": "Fixture project for building detection and QA/QC workflow."
}
```

### Area

A small polygon near the Kempen demo viewport.

### Reference buildings

Use `fixtures/geojson/reference_buildings_fixture.geojson`.

### Predicted buildings

Use `fixtures/geojson/predicted_buildings_fixture.geojson`.

## Required seed command

Codex should add a command similar to:

```bash
python -m app.scripts.seed_demo
```

or a Make target:

```bash
make seed-demo
```

## Seed acceptance

After running seed:

- one project exists
- one area exists
- reference building dataset exists
- predicted building dataset or analysis output exists
- QA/QC can run against the two fixture layers