# Settings & metadata

## 1. High-Level Overview

**Purpose:** System, directory, camera, and per-user UI settings; **detection class catalog** for labels/colors — `01_annotations.md` §11–12 (camera) plus settings/directory narratives; `GET /classes` for annotator.

**Architectural pattern:** CRUD settings services + thin metadata read controller.

**Upstream dependencies:** Platform (DB, auth — `ADM` on mutating settings).

**Downstream consumers:** All UIs; `PathResolver` after directory updates (reset).

## 2. Internal interfaces

`SettingsService`, `SettingsController`, `ClassesController`.

## 3. External API

Mixed `[Authorize]` and policy `ADM` for writes under `/settings`; `GET /classes` authenticated read.

## 4. Modules included

`settings-metadata-service`.