# Game server (`NeonSprawl.Server`)

ASP.NET Core **.NET 10** host for authoritative simulation (prototype: HTTP + health + in-memory position read API).

## Run

```bash
cd server/NeonSprawl.Server
dotnet run
```

- Default URL is printed by Kestrel (see `Properties/launchSettings.json`, typically `http://localhost:5253`).
- Check `GET /health` for a JSON heartbeat.

## Position state (NS-15)

Authoritative player position is held **in memory** (no database yet). The HTTP JSON shape is versioned with top-level `schemaVersion` (see XML docs on `PositionStateResponse` in the server project). Path `{id}` is **trimmed** and matched **case-insensitively** against stored players; `playerId` in the JSON body echoes the path segment from the request.

Example (dev player id defaults to `dev-local-1` in `appsettings.json`):

```bash
curl -s http://localhost:5253/game/players/dev-local-1/position
```

Sample response:

```json
{"schemaVersion":1,"playerId":"dev-local-1","position":{"x":0,"y":0,"z":0},"sequence":0}
```

Unknown player ids return **404**. This endpoint is a **spike** until durable persistence and full sync exist.

For a **PR/Jira-ready** contract blurb (formatted JSON + field table), see the [NS-15 implementation plan — Pull request description](../../docs/plans/NS-15-implementation-plan.md#pull-request-description-jira-ac).

## Solution

From repo root: `dotnet build NeonSprawl.sln` and `dotnet test NeonSprawl.sln`.

## CI

Pull requests targeting `main` run build and tests via [`.github/workflows/dotnet.yml`](../.github/workflows/dotnet.yml) on GitHub Actions (`ubuntu-latest` runner, **Release** configuration).