# Frame Processor

Self-hosted ASP.NET Core (.NET 10) service that dithers and color-remaps images for
Spectra 6 e-ink frames, persists the result to disk, and notifies the frame via MQTT.

## Documentation

- [`SPEC.md`](SPEC.md) — authoritative behavior contract.
- [`PLAN.md`](PLAN.md) — implementation design and verification checklist.
- [`CLAUDE.md`](CLAUDE.md) — load-bearing conventions and working notes.

## Quick start

```sh
docker compose up --build
```

Brings up `frame-processor` on `:8080` plus a `mosquitto` broker on `:1883`.

## Smoke tests

```sh
# Health (also reports MQTT connection state)
curl http://localhost:8080/health

# Upload a file
curl -H "X-Api-Key: change-me" \
     -F "image=@photo.jpg" \
     http://localhost:8080/api/frames/living-room/image

# Upload via URL
curl -H "X-Api-Key: change-me" \
     -H "Content-Type: application/json" \
     -d '{"url":"https://example.com/photo.jpg"}' \
     http://localhost:8080/api/frames/living-room/image-url

# Fetch the processed PNG (the frame does this on MQTT signal)
curl http://localhost:8080/i/aabbccddeeff.png > out.png

# Watch MQTT publishes
mosquitto_sub -t 'frames/#' -v
```

Configure frames in [`frames.json`](frames.json); service settings in
[`appsettings.json`](appsettings.json) (or via `Mqtt__Host`-style env vars).
