diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..6325ce947e441d40c11468d4ce181fda39ebbf80
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "contrib/engine-clock"]
+	path = contrib/engine-clock
+	url = git@gitlab.servus.at:aura/engine-clock.git
+[submodule "contrib/engine-api"]
+	path = contrib/engine-api
+	url = git@gitlab.servus.at:aura/engine-api.git
diff --git a/contrib/aura-clock/.gitignore b/contrib/aura-clock/.gitignore
deleted file mode 100644
index da93220bc34984be11385afbbe6cd044e7b455eb..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-/node_modules/
-/public/build/
-
-.DS_Store
diff --git a/contrib/aura-clock/README.md b/contrib/aura-clock/README.md
deleted file mode 100644
index 234b0742edd75d4d079b0e33f4e4870ef4c44240..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/README.md
+++ /dev/null
@@ -1,93 +0,0 @@
-*Looking for a shareable component template? Go here --> [sveltejs/component-template](https://github.com/sveltejs/component-template)*
-
----
-
-# svelte app
-
-This is a project template for [Svelte](https://svelte.dev) apps. It lives at https://github.com/sveltejs/template.
-
-To create a new project based on this template using [degit](https://github.com/Rich-Harris/degit):
-
-```bash
-npx degit sveltejs/template svelte-app
-cd svelte-app
-```
-
-*Note that you will need to have [Node.js](https://nodejs.org) installed.*
-
-
-## Get started
-
-Install the dependencies...
-
-```bash
-cd svelte-app
-npm install
-```
-
-...then start [Rollup](https://rollupjs.org):
-
-```bash
-npm run dev
-```
-
-Navigate to [localhost:5000](http://localhost:5000). You should see your app running. Edit a component file in `src`, save it, and reload the page to see your changes.
-
-By default, the server will only respond to requests from localhost. To allow connections from other computers, edit the `sirv` commands in package.json to include the option `--host 0.0.0.0`.
-
-
-## Building and running in production mode
-
-To create an optimised version of the app:
-
-```bash
-npm run build
-```
-
-You can run the newly built app with `npm run start`. This uses [sirv](https://github.com/lukeed/sirv), which is included in your package.json's `dependencies` so that the app will work when you deploy to platforms like [Heroku](https://heroku.com).
-
-
-## Single-page app mode
-
-By default, sirv will only respond to requests that match files in `public`. This is to maximise compatibility with static fileservers, allowing you to deploy your app anywhere.
-
-If you're building a single-page app (SPA) with multiple routes, sirv needs to be able to respond to requests for *any* path. You can make it so by editing the `"start"` command in package.json:
-
-```js
-"start": "sirv public --single"
-```
-
-
-## Deploying to the web
-
-### With [now](https://zeit.co/now)
-
-Install `now` if you haven't already:
-
-```bash
-npm install -g now
-```
-
-Then, from within your project folder:
-
-```bash
-cd public
-now deploy --name my-project
-```
-
-As an alternative, use the [Now desktop client](https://zeit.co/download) and simply drag the unzipped project folder to the taskbar icon.
-
-### With [surge](https://surge.sh/)
-
-Install `surge` if you haven't already:
-
-```bash
-npm install -g surge
-```
-
-Then, from within your project folder:
-
-```bash
-npm run build
-surge public my-project.surge.sh
-```
diff --git a/contrib/aura-clock/package-lock.json b/contrib/aura-clock/package-lock.json
deleted file mode 100644
index 94db01f7031877ed17329bc51fa21de1dbb87f96..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/package-lock.json
+++ /dev/null
@@ -1,2290 +0,0 @@
-{
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-  "version": "1.0.0",
-  "lockfileVersion": 1,
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-      "dev": true,
-      "requires": {
-        "@babel/highlight": "^7.8.3"
-      }
-    },
-    "@babel/highlight": {
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-      "dev": true,
-      "requires": {
-        "chalk": "^2.0.0",
-        "esutils": "^2.0.2",
-        "js-tokens": "^4.0.0"
-      }
-    },
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-    },
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diff --git a/contrib/aura-clock/package.json b/contrib/aura-clock/package.json
deleted file mode 100644
index d30952b40c023f3745c0d7258847cedd1c29b4ff..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/package.json
+++ /dev/null
@@ -1,32 +0,0 @@
-{
-  "name": "aura-engine-clock",
-  "version": "1.0.0",
-  "author": {
-    "name": "David Trattnig",
-    "email": "david.trattnig@subsquare.at",
-    "url": "https://subsquare.at"
-  },
-  "license": "AGPL-3.0-only",
-  "homepage": "https://gitlab.servus.at/aura/meta",
-  "repository": {
-    "type": "git",
-    "url": "git@gitlab.servus.at:aura/engine.git"
-  },
-  "scripts": {
-    "build": "rollup -c",
-    "dev": "rollup -c -w",
-    "start": "sirv public"
-  },
-  "devDependencies": {
-    "@rollup/plugin-commonjs": "^11.0.0",
-    "@rollup/plugin-node-resolve": "^7.0.0",
-    "rollup": "^1.20.0",
-    "rollup-plugin-livereload": "^1.0.0",
-    "rollup-plugin-svelte": "^5.0.3",
-    "rollup-plugin-terser": "^5.1.2",
-    "svelte": "^3.0.0"
-  },
-  "dependencies": {
-    "sirv-cli": "^0.4.4"
-  }
-}
diff --git a/contrib/aura-clock/public/favicon.png b/contrib/aura-clock/public/favicon.png
deleted file mode 100644
index b210b336cd8f214dd83f2ea3dc6ce6d9cc413937..0000000000000000000000000000000000000000
Binary files a/contrib/aura-clock/public/favicon.png and /dev/null differ
diff --git a/contrib/aura-clock/public/global.css b/contrib/aura-clock/public/global.css
deleted file mode 100644
index ec905f5ece9f725a3a3c33400392da8b7bf9b123..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/public/global.css
+++ /dev/null
@@ -1,66 +0,0 @@
-html, body {
-	position: relative;
-	width: 100%;
-	height: 100%;
-}
-
-body {
-	color: #333;
-	margin: 0;
-	padding: 8px;
-	box-sizing: border-box;
-	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
-}
-
-a {
-	color: rgb(0,100,200);
-	text-decoration: none;
-}
-
-a:hover {
-	text-decoration: underline;
-}
-
-a:visited {
-	color: rgb(0,80,160);
-}
-
-label {
-	display: block;
-}
-
-input, button, select, textarea {
-	font-family: inherit;
-	font-size: inherit;
-	padding: 0.4em;
-	margin: 0 0 0.5em 0;
-	box-sizing: border-box;
-	border: 1px solid #ccc;
-	border-radius: 2px;
-}
-
-input:disabled {
-	color: #ccc;
-}
-
-input[type="range"] {
-	height: 0;
-}
-
-button {
-	color: #333;
-	background-color: #f4f4f4;
-	outline: none;
-}
-
-button:disabled {
-	color: #999;
-}
-
-button:not(:disabled):active {
-	background-color: #ddd;
-}
-
-button:focus {
-	border-color: #666;
-}
diff --git a/contrib/aura-clock/public/index.html b/contrib/aura-clock/public/index.html
deleted file mode 100644
index 555c98f10227d536c94d8c70de72f009af5121d0..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/public/index.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset='utf-8'>
-	<meta name='viewport' content='width=device-width,initial-scale=1'>
-
-	<title>Aura Engine - Studio Clock</title>
-
-	<link rel='icon' type='image/png' href='/favicon.png'>
-	<link rel='stylesheet' href='/global.css'>
-	<link rel='stylesheet' href='/build/aura-clock-bundle.css'>
-
-	<script defer src='/build/aura-clock-bundle.js'></script>
-</head>
-
-<body style="background-color: black;">
-	<aura-clock 
-		name="Studio Clock" 
-		logo="https://o94.at/themes/custom/radio_orange/logo1.png" 
-		logosize="180px" 
-		api="http://localhost:3333/api/v1/"
-		css="http://localhost:3333/css/aura.css">
-		
-	</aura-clock>
-</body>
-</html>
diff --git a/contrib/aura-clock/rollup.config.js b/contrib/aura-clock/rollup.config.js
deleted file mode 100644
index c6a5c2175e244230d34b7ccaa41ada5764f00881..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/rollup.config.js
+++ /dev/null
@@ -1,72 +0,0 @@
-import svelte from 'rollup-plugin-svelte';
-import resolve from '@rollup/plugin-node-resolve';
-import commonjs from '@rollup/plugin-commonjs';
-import livereload from 'rollup-plugin-livereload';
-import { terser } from 'rollup-plugin-terser';
-
-const production = !process.env.ROLLUP_WATCH;
-
-export default {
-	input: 'src/main.js',
-	output: {
-		sourcemap: true,
-		format: 'iife',
-		name: 'app',
-		file: 'public/build/aura-clock-bundle.js'
-	},
-	plugins: [
-		svelte({
-			// enable run-time checks when not in production
-			dev: !production,
-			// we'll extract any component CSS out into
-			// a separate file - better for performance
-			css: css => {
-				css.write('public/build/aura-clock-bundle.css');
-			},
-			customElement: true
-		}),
-
-		// If you have external dependencies installed from
-		// npm, you'll most likely need these plugins. In
-		// some cases you'll need additional configuration -
-		// consult the documentation for details:
-		// https://github.com/rollup/plugins/tree/master/packages/commonjs
-		resolve({
-			browser: true,
-			dedupe: ['svelte']
-		}),
-		commonjs(),
-
-		// In dev mode, call `npm run start` once
-		// the bundle has been generated
-		!production && serve(),
-
-		// Watch the `public` directory and refresh the
-		// browser on changes when not in production
-		!production && livereload('public'),
-
-		// If we're building for production (npm run build
-		// instead of npm run dev), minify
-		production && terser()
-	],
-	watch: {
-		clearScreen: false
-	}
-};
-
-function serve() {
-	let started = false;
-
-	return {
-		writeBundle() {
-			if (!started) {
-				started = true;
-
-				require('child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
-					stdio: ['ignore', 'inherit', 'inherit'],
-					shell: true
-				});
-			}
-		}
-	};
-}
diff --git a/contrib/aura-clock/src/StudioClock.svelte b/contrib/aura-clock/src/StudioClock.svelte
deleted file mode 100644
index 7470d42ab2e032c826060258ec248cd2e5314df7..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/src/StudioClock.svelte
+++ /dev/null
@@ -1,490 +0,0 @@
-<svelte:options tag="aura-clock"/>
-<main bind:this={rootElement}></main>
-<script>
-	import { onMount } from 'svelte';
-	export let css = "";
-	export let api = "http://localhost:3333/api/v1";
-	export let name = "Studio Clock";
-	export let logo = "https://gitlab.servus.at/aura/meta/-/raw/master/images/aura-logo.png";
-	export let logosize  = "100px";
-	export let noScheduleMessage = "Nothing scheduled!";
-
-	let time = new Date(); 
-	let queryCurrent = "/clock";
-	let rootElement;
-	let data;
-	let currentTrack = null;
-	let timeLeft;
-
-
-	// these automatically update when `time`
-	// changes, because of the `$:` prefix
-	$: hours = time.getHours();
-	$: minutes = time.getMinutes();
-	$: seconds = time.getSeconds();
-
-	data = fetchApi(queryCurrent);
-
-
-	onMount(() => {
-		const interval = setInterval(() => {
-			time = new Date();
-			timeLeft -= 1;
-
-			if (timeLeft <= 0 || data == null) {
-				currentTrack = null;
-				data = null;
-				data = fetchApi(queryCurrent);
-			}
-		}, 1000);
-
-		return () => {
-			clearInterval(interval);
-		};
-	});
-
-	async function fetchApi(query) {
-		let response;
-		let data;
-
-		try {
-			response = await fetch(api+query);
-		} catch {
-			throw new Error("Cannot connect to Engine!");
-		}
-
-		try {
-			data = await response.json();
-		} catch(e) {
-			console.log("Error while converting response to JSON!", e);
-			throw new Error(response.statusText);
-		}
-
-		if (response.ok) {
-			return data;
-		} else {
-			console.log("Error:", data);
-			throw new Error(data.message);
-		}
-	}
-
-	function initComponent(info) {
-
-		/* Load external CSS */
-		if (css != null)
-			loadExternalCss(rootElement, css);
-
-		/* Set currently loaded data */
-		if (currentTrack == null && info != null && info.track != null) {
-			currentTrack = info;
-			
-			let t = time - Date.parse(info.track_start);
-			t = parseInt(t/1000);
-
-			timeLeft = info.track.duration - t - 3; /* FIXME improve timings in coordination with scheduler/trackservice/LQS */
-			console.log("Current Data", info);
-		}
-		return "";
-	}
-
-	function displayTitle(track) {
-		if (track != null) {
-			let artist = "";
-			if (track.artist != "")
-				artist = track.artist + " - ";
-			return artist + track.title;
-		}
-		return "";
-	}
-
-	function formatTime(seconds) {
-		if (seconds != null && Number.isInteger(seconds)) {
-			let d = new Date(null);
-			d.setSeconds(seconds);
-
-			let s;
-			if (seconds > 3600)
-				s = d.toISOString().substr(11, 8);
-			else
-				s = d.toISOString().substr(14, 5);
-			return s;
-		}
-		return "";
-	}
-
-	function displayShowName(show) {
-		let name = ""
-		if (show == null || show.name == null) {
-			name = '<span class="error">'+noScheduleMessage+'</span>';
-		} else {
-			name = show.name;
-		}
-		return name;
-	}
-
-	function displayShowSchedule(schedule) {
-		let str = "";
-
-		if (schedule != null && schedule.schedule_start != null) {
-			let scheduleStart = ""
-			let scheduleEnd = "";
-
-			if (schedule.schedule_start != null) {
-				let scheduleStart = new Date(Date.parse(schedule.schedule_start));
-				scheduleStart = scheduleStart.toLocaleTimeString(navigator.language, {
-					hour: '2-digit',
-					minute:'2-digit'
-				});
-				str = "(" + scheduleStart;
-			}
-			if (schedule.schedule_end != null) {
-				scheduleEnd = new Date(Date.parse(schedule.schedule_end));
-				scheduleEnd = scheduleEnd.toLocaleTimeString(navigator.language, {
-					hour: '2-digit',
-					minute:'2-digit'
-				});
-				str = str + " - " + scheduleEnd + ")";
-			} else {
-				str += ")";
-			}
-
-		}
-		return str;
-	}
-
-	function isActive(entry, currentTrack) {
-		if (currentTrack != null && entry.id == currentTrack.id) {
-			// Scroll to current playlist entry
-			location.hash = "#current-playlist-entry";
-			return true;
-		}
-		return false;
-	}
-
-	function loadExternalCss(root, file) {
-		let element = document.createElement("link");
-		element.setAttribute("rel", "stylesheet");
-		element.setAttribute("type", "text/css");
-		element.setAttribute("href", file);
-		root.appendChild(element);
-	}
-	
-</script>
-
-<style>
-
-	#station-header {
-		width: 100%;
-		height: 50px;
-		/* margin: 20px 100px; */
-		padding: 40px 100px;
-	}
-
-	#station-name {
-		margin: 0;
-    	font-size: 3em;
-		line-height: 80px;
-	}
-
-	#station-logo {
-		align-content: left;
-		text-align: right;
-		margin: 0 40px 0 10px;
-		opacity: 0.5;
-		filter: invert(100%);
-	}
-
-	#studio-clock {
-		width: calc(100% - 200px);
-		height: calc(100% - 500px);
-		margin: 100px;
-		display: -webkit-flex;
-		display: -ms-flexbox;
-		display: flex;
-		/* border: 2px solid #333; */
-		flex-direction: row;
-	}
-
-	#left-column {
-		width: 30%;
-		padding: 25px;
-	}
-
-	#right-column {
-		width: 70%;
-		padding: 25px 25px 25px 50px;
-	}
-
-	#current-schedule,
-	#next-schedule {
-		margin: 0 0 40px 20px;
-	}
-
-	#next-schedule {
-		background-color:rgb(24, 24, 24);
-		margin-right: 20px;
-		padding: 12px;
-	}
-
-	#current-schedule .schedule-title {
-		color: #ccc;
-		font-size: 3.5em;
-	}
-	#next-schedule .schedule-title {
-		color: gray !important;
-		font-size: 2em;
-	}
-
-	#playlist {
-		border: 2px solid #333;
-		margin: 20px 20px 40px 20px;
-		padding: 10px;
-		height: calc(80% - 100px);
-		overflow-y: auto;
-		scroll-behavior: smooth; 
-		background-color: #111;
-		display: flex;
-   		align-items: center;
-	}
-
-	#playlist::-webkit-scrollbar-track
-	{
-		border-radius: 10px;
-		-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
-		background-color: rgb(77, 73, 73);
-	}
-
-	#playlist::-webkit-scrollbar
-	{
-		width: 12px;
-		background-color: rgb(0, 0, 0);
-	}
-
-	#playlist::-webkit-scrollbar-thumb
-	{
-		border-radius: 10px;
-		-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
-		background-color: rgb(34, 32, 32);
-	}
-
-	.playlist-entry {
-		font-size: 1.9em;
-		padding-left: 53px;
-	}
-
-	#current-track * {
-		font-size: 1.5em;
-	}
-
-	.play-icon,
-	.track-time-left {
-		margin: 25px 50px;
-	}
-
-	.is-active {
-		color: green;
-		padding-left: 0;
-	}
-
-	.is-active .track-title::before {
-		content: "\00a0\00a0â–¶\00a0\00a0\00a0";
-		font-size: larger; 
-		color: green;
-	}
-
-	.is-active .track-time-left {
-		color: rgb(43, 241, 36);
-		background-color: #222;
-		padding: 5px 15px;
-	}
-
-	.error {
-		font-size: 1.3em;
-		color:red;
-		height:100%;
-		display : flex;
-		align-items : center;
-		justify-content: center;
-	}
-
-	svg {
-		width: 100%;
-		height: 100%;
-	}
-
-	.clock-face {
-		stroke: rgb(66, 66, 66);
-		fill: black;
-	}
-
-	.minor {
-		stroke: rgb(132, 132, 132);
-		stroke-width: 0.5;
-	}
-
-	.major {
-		stroke: rgb(162, 162, 162);
-		stroke-width: 1;
-	}
-
-	.hour {
-		stroke: rgba(255, 255, 255, 0.705);
-	}
-
-	.minute {
-		stroke: rgba(255, 255, 255, 0.705);
-	}
-
-	.second, .second-counterweight {
-		stroke: rgb(180,0,0);
-	}
-
-	.second-counterweight {
-		/* stroke-width: 3; */
-	}
-
-	footer {
-		width: 100%;
-		text-align: center;
-		font-size: 0.8em;
-		color: gray;
-		opacity: 0.5;
-	}
-
-	footer a {
-		color: gray;
-		text-decoration: underline;
-	}
-
-	footer #aura-logo {
-		/* opacity: 0.5; */
-		filter: invert(100%);
-		width: 75px;
-		margin: 0 0 20px 0;
-	}
-
-</style>
-
-
-
-<div id="station-header">
-	<img id="station-logo" src="{logo}" style="width:{logosize}" alt="Radio Station" align="left" />
-	<h1 id="station-name">{name}</h1>
-</div>
-
-<div id="studio-clock">
-	<div id="left-column" class="column">
-		<svg viewBox='-50 -50 100 100'>
-			<circle class='clock-face' r='48'/>
-
-			<!-- markers -->
-			{#each [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55] as minute}
-				<line
-					class='major'
-					y1='35'
-					y2='45'
-					transform='rotate({30 * minute})'
-				/>
-
-				{#each [1, 2, 3, 4] as offset}
-					<line
-						class='minor'
-						y1='42'
-						y2='45'
-						transform='rotate({6 * (minute + offset)})'
-					/>
-				{/each}
-			{/each}
-
-			<!-- hour hand -->
-			<line
-				class='hour'
-				y1='2'
-				y2='-20'
-				transform='rotate({30 * hours + minutes / 2})'
-			/>
-
-			<!-- minute hand -->
-			<line
-				class='minute'
-				y1='4'
-				y2='-30'
-				transform='rotate({6 * minutes + seconds / 10})'
-			/>
-
-			<!-- second hand -->
-			<g transform='rotate({6 * seconds})'>
-				<line class='second' y1='10' y2='-38'/>
-				<line class='second-counterweight' y1='10' y2='2'/>
-			</g>
-		</svg>
-	</div>
-
-	<div id="right-column" class="column">
-
-		{#await data}
-			<div class="spinner-border mt-5" role="status">
-				<span class="sr-only">Loading...</span>
-			</div>
-		{:then value}
-			{initComponent(value)}
-			
-			{#if value.current.show}
-
-			<div id="current-schedule">
-				<h1 class="schedule-title">{@html displayShowName(value.current.show)} {displayShowSchedule(value.current)}</h1>
-				<!-- <div class="schedule-details">
-					<b>Type:</b> {value.current.show.type}, <b>Host:</b> {value.current.show.host}</div>-->
-			</div> 
-			<div id="playlist">
-
-				{#if value.current.playlist}
-					<ol>
-					{#each value.current.playlist.entries as entry, index}
-						{#if isActive(entry, value.track)}
-						
-						<li id="current-playlist-entry" class="playlist-entry is-active">
-							<!-- <span class="play-icon">&#9654;</span> -->
-							<span class="track-title">{displayTitle(entry)}</span>
-							<span class="track-time-left">({formatTime(timeLeft)})</span>
-						</li>
-
-						{:else}
-
-						<li class="playlist-entry">
-							<span class="track-title">{displayTitle(entry)}</span>
-							<span class="track-duration">({formatTime(entry.duration)})</span>
-						</li>	
-
-						{/if}
-
-					{/each}
-					</ol>
-				{:else}
-
-					<div id="current-track" class="is-active">
-						<h2>
-							<span class="track-title">{displayTitle(value.track)}</span>
-							<span class="track-time-left">{formatTime(timeLeft)}</span>
-						</h2>
-					</div>
-				{/if}
-			</div>
-			<div id="next-schedule">
-				<h3 class="schedule-title">Next: {@html displayShowName(value.next.show)} {displayShowSchedule(value)}</h3>
-			</div>
-
-			{/if}
-		{:catch error}
-			<div class="error"><p>{error}</p></div>
-		{/await}
-
-	</div>
-
-</div>
-
-<footer>
-	<a href="https://gitlab.servus.at/aura/meta"><img id="aura-logo" src="https://gitlab.servus.at/aura/meta/-/raw/master/images/aura-logo.png" alt="Aura Logo" /></a>
-	<br/>
-	Studio Clock is powered by <a href="https://gitlab.servus.at/autoradio">Aura Engine</a>
-</footer>
\ No newline at end of file
diff --git a/contrib/aura-clock/src/main.js b/contrib/aura-clock/src/main.js
deleted file mode 100644
index edb5da3ef82eb8d1bfced2bee5d4c0b71f11423d..0000000000000000000000000000000000000000
--- a/contrib/aura-clock/src/main.js
+++ /dev/null
@@ -1 +0,0 @@
-import StudioClock from './StudioClock.svelte';
diff --git a/contrib/engine-api b/contrib/engine-api
new file mode 160000
index 0000000000000000000000000000000000000000..ae560241e5947f595a793413dfc48657807233b0
--- /dev/null
+++ b/contrib/engine-api
@@ -0,0 +1 @@
+Subproject commit ae560241e5947f595a793413dfc48657807233b0
diff --git a/contrib/engine-clock b/contrib/engine-clock
new file mode 160000
index 0000000000000000000000000000000000000000..6ae833ad05501cfed65d54becf1f749bded1fd0d
--- /dev/null
+++ b/contrib/engine-clock
@@ -0,0 +1 @@
+Subproject commit 6ae833ad05501cfed65d54becf1f749bded1fd0d