KeGG-KnowlEdgeGraphGrokker/masterclasses/unity-cloud-masterclass.html at main · hagopjay/KeGG-KnowlEdgeGraphGrokker · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Unity Cloud Engineering Masterclass</title>
<meta property="og:title" content="Unity Cloud Engineering Masterclass">
<meta property="og:description" content="End-to-end guide to Unity cloud engineering — deployment, scaling, and infrastructure for real-time 3D applications.">
<meta property="og:image" content="../mathsGraph.jpg">
<meta property="og:type" content="article">
<style>
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Syne:wght@400;500;700;800&family=Inter:wght@300;400;500&display=swap');

:root {
  --bg: #0a0c10;
  --bg2: #0f1218;
  --bg3: #161b24;
  --panel: #1a2030;
  --border: #232b3a;
  --border2: #2d3a50;
  --accent: #00d4ff;
  --accent2: #7c3aed;
  --accent3: #10b981;
  --accent4: #f59e0b;
  --red: #ef4444;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #64748b;
  --code-bg: #0d1117;
  --code-border: #1e2a3a;
  --mono: 'JetBrains Mono', monospace;
  --display: 'Syne', sans-serif;
  --body: 'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.7;
  display: flex;
  min-height: 100vh;
}

/* SIDEBAR */
#sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.sidebar-header {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo {
  font-family: var(--display);
  font-weight: 800;
  font-size: 18px;
  color: var(--accent);
  letter-spacing: -0.5px;
  line-height: 1.2;
}
.sidebar-logo span { color: var(--text2); font-weight: 400; font-size: 12px; display: block; margin-top: 4px; letter-spacing: 0.5px; text-transform: uppercase; }

.progress-bar-wrap {
  margin-top: 14px;
  background: var(--border);
  border-radius: 3px;
  height: 3px;
}
.progress-bar {
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 3px;
  transition: width 0.4s ease;
  width: 0%;
}

.nav-section {
  padding: 6px 0;
}

.nav-section-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text3);
  padding: 12px 20px 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text2);
  border-left: 2px solid transparent;
  transition: all 0.15s;
  text-decoration: none;
}
.nav-item:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-item.active { color: var(--accent); border-left-color: var(--accent); background: rgba(0,212,255,0.06); }

.nav-item .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--border2);
  flex-shrink: 0;
  transition: background 0.15s;
}
.nav-item.active .dot { background: var(--accent); box-shadow: 0 0 6px var(--accent); }

/* MAIN */
#main {
  margin-left: 280px;
  flex: 1;
  max-width: 900px;
  padding: 0 48px 120px;
}

/* HERO */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 56px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero h1 {
  font-family: var(--display);
  font-size: 52px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.hero p {
  font-size: 17px;
  color: var(--text2);
  max-width: 620px;
  line-height: 1.65;
}

.hero-meta {
  display: flex;
  gap: 24px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.hero-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text3);
}
.hero-chip strong { color: var(--text2); font-weight: 500; }

/* SECTIONS */
.section {
  margin-bottom: 72px;
  scroll-margin-top: 40px;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.section-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  opacity: 0.7;
}

h2 {
  font-family: var(--display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.8px;
  color: var(--text);
}

h3 {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 32px 0 12px;
  letter-spacing: -0.3px;
}

h4 {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text3);
  margin: 24px 0 10px;
}

p { color: var(--text2); margin-bottom: 14px; }
p strong { color: var(--text); font-weight: 500; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* CALLOUTS */
.callout {
  border-radius: 8px;
  padding: 16px 18px;
  margin: 20px 0;
  border-left: 3px solid;
  font-size: 14px;
}
.callout p { margin: 0; }
.callout.info { background: rgba(0,212,255,0.06); border-color: var(--accent); }
.callout.info p { color: #7dd3e8; }
.callout.warn { background: rgba(245,158,11,0.06); border-color: var(--accent4); }
.callout.warn p { color: #d4a44c; }
.callout.danger { background: rgba(239,68,68,0.06); border-color: var(--red); }
.callout.danger p { color: #f87171; }
.callout.success { background: rgba(16,185,129,0.06); border-color: var(--accent3); }
.callout.success p { color: #6ee7b7; }
.callout-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.callout.info .callout-label { color: var(--accent); }
.callout.warn .callout-label { color: var(--accent4); }
.callout.danger .callout-label { color: var(--red); }
.callout.success .callout-label { color: var(--accent3); }

/* CODE */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  margin: 16px 0;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 13px;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--code-border);
}

.code-lang {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text3);
}

.code-copy {
  font-size: 11px;
  color: var(--text3);
  cursor: pointer;
  background: none;
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 4px;
  font-family: var(--body);
  transition: all 0.15s;
  cursor: pointer;
}
.code-copy:hover { color: var(--text); border-color: var(--border2); }
.code-copy.copied { color: var(--accent3); border-color: var(--accent3); }

pre {
  padding: 18px 20px;
  overflow-x: auto;
  line-height: 1.6;
  color: #a8b4c8;
}
pre::-webkit-scrollbar { height: 4px; }
pre::-webkit-scrollbar-track { background: transparent; }
pre::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.kw { color: #c792ea; }
.str { color: #c3e88d; }
.cmt { color: #546e7a; font-style: italic; }
.num { color: #f78c6c; }
.fn { color: #82aaff; }
.type { color: #ffcb6b; }
.op { color: #89ddff; }
.var { color: #eeffff; }

/* STEP CARDS */
.steps {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 20px 0;
}

.step {
  display: flex;
  gap: 16px;
  padding: 16px 18px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  align-items: flex-start;
}

.step-num {
  width: 26px;
  height: 26px;
  background: rgba(0,212,255,0.12);
  border: 1px solid rgba(0,212,255,0.25);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 1px;
}

.step-content { flex: 1; }
.step-title { font-weight: 500; color: var(--text); font-size: 14px; margin-bottom: 4px; }
.step-desc { font-size: 13px; color: var(--text2); margin: 0; }

/* ERROR TABLE */
.err-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 13px;
}

.err-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text3);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.err-table td {
  padding: 12px 14px;
  border: 1px solid var(--border);
  vertical-align: top;
  color: var(--text2);
}

.err-table tr:hover td { background: rgba(255,255,255,0.02); }

.err-table .err-code {
  font-family: var(--mono);
  color: var(--red);
  font-size: 12px;
}

.err-table .fix-code {
  font-family: var(--mono);
  color: var(--accent3);
  font-size: 12px;
}

/* ARCH DIAGRAM */
.arch-svg-wrap {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin: 24px 0;
}

/* PACKAGES GRID */
.pkg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0;
}

.pkg-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}

.pkg-name {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 4px;
}

.pkg-desc {
  font-size: 12px;
  color: var(--text3);
  line-height: 1.5;
}

/* INSIGHT BOX */
.insight {
  background: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(0,212,255,0.06));
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 20px 0;
}

.insight-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 8px;
}

.insight p { color: #c4b5fd; margin: 0; font-size: 14px; }

/* SCALING METRICS */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.metric-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.metric-val {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 11px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* INLINE CODE */
code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: rgba(0,212,255,0.08);
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  <a href="../index.html" style="color:#cc4400;text-decoration:none;">KeGG</a>
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  <span style="color:#b8b0a4;">Masterclasses</span>
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  <span style="color:#f2ece0;">Unity Cloud Engineering Masterclass</span>
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  <div class="sidebar-header">
    <div class="sidebar-logo">
      Unity Cloud<br>
      <span>Engineering Masterclass</span>
    </div>
    <div class="progress-bar-wrap">
      <div class="progress-bar" id="progressBar"></div>
    </div>
  </div>

  <div class="nav-section">
    <div class="nav-section-label">Foundation</div>
    <a class="nav-item active" href="#overview"><span class="dot"></span>Architecture Overview</a>
    <a class="nav-item" href="#prerequisites"><span class="dot"></span>Prerequisites & Setup</a>
    <a class="nav-item" href="#project-setup"><span class="dot"></span>Unity Project Setup</a>
    <a class="nav-item" href="#ugs-dashboard"><span class="dot"></span>UGS Dashboard</a>
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  <div class="nav-section">
    <div class="nav-section-label">Core Services</div>
    <a class="nav-item" href="#authentication"><span class="dot"></span>Authentication</a>
    <a class="nav-item" href="#lobby"><span class="dot"></span>Lobby Service</a>
    <a class="nav-item" href="#relay"><span class="dot"></span>Relay Service</a>
    <a class="nav-item" href="#netcode"><span class="dot"></span>Netcode for GameObjects</a>
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<!-- MAIN CONTENT -->
<main id="main">

  <div class="hero">
    <div class="hero-tag">🎮 Soup to Nuts</div>
    <h1>Unity Cloud<br>Engineering</h1>
    <p>A hands-on masterclass building a full Unity Gaming Services proof of concept — Auth, Lobby, Relay, Netcode, Cloud Save, Remote Config — with every gotcha, fix, and scaling truth documented.</p>
    <div class="hero-meta">
      <div class="hero-chip">🗓 <strong>Unity 2023.2+</strong></div>
      <div class="hero-chip">📦 <strong>UGS SDK 2.x</strong></div>
      <div class="hero-chip">🌐 <strong>NGO 1.9+</strong></div>
      <div class="hero-chip">⚡ <strong>Relay + Lobby</strong></div>
    </div>
  </div>


  <!-- ═══════════════════════════════════════════ SECTION 1 -->
  <section class="section" id="overview">
    <div class="section-header">
      <span class="section-num">01</span>
      <h2>Architecture Overview</h2>
    </div>

    <p>Before writing a single line of C#, you need a mental map of what Unity Cloud actually <em>is</em>. The umbrella brand is <strong>Unity Gaming Services (UGS)</strong>. It's a suite of cloud backend services that Unity maintains so you don't have to spin up your own servers. Here's what we're building and how the pieces connect:</p>

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        <text x="80" y="200" text-anchor="middle" font-family="JetBrains Mono,monospace" font-size="10" fill="#64748b">Unity Client</text>

        <!-- CLIENT B -->
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        <!-- AUTH -->
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        <!-- LOBBY -->
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        <text x="525" y="280" text-anchor="middle" font-family="JetBrains Mono,monospace" font-size="10" fill="#64748b">Host/Client Logic</text>

        <!-- ARROWS: clients to auth -->
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        <!-- ARROWS: clients to lobby -->
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        <!-- ARROWS: clients to relay -->
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        <!-- Lobby to Relay (join code flow) -->
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        <!-- Auth to Cloud Save -->
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        <!-- P2P bidirectional -->
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        <text x="100" y="232" font-family="JetBrains Mono,monospace" font-size="9" fill="#10b981" opacity="0.7">P2P via Relay</text>

        <!-- Legend -->
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        <line x1="218" y1="363" x2="248" y2="363" stroke="#7c3aed" stroke-width="1.5"/>
        <text x="254" y="367" font-family="JetBrains Mono,monospace" font-size="10" fill="#94a3b8">Auth flow</text>
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        <text x="356" y="367" font-family="JetBrains Mono,monospace" font-size="10" fill="#94a3b8">Lobby flow</text>
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        <text x="460" y="367" font-family="JetBrains Mono,monospace" font-size="10" fill="#94a3b8">Relay/P2P flow</text>
      </svg>
    </div>

    <div class="insight">
      <div class="insight-label">🧠 Core Insight</div>
      <p><strong>The mental model that unlocks everything:</strong> Lobby handles <em>discovery</em> (finding each other), Relay handles <em>transport</em> (talking to each other), and Netcode handles <em>logic</em> (what you say). Authentication is the passport that allows access to all three. These are separate services with separate SDKs that you glue together in your code.</p>
    </div>

    <h3>The Full Flow in Words</h3>
    <div class="steps">
      <div class="step">
        <div class="step-num">1</div>
        <div class="step-content">
          <div class="step-title">Sign In (Authentication)</div>
          <div class="step-desc">Both players sign in anonymously or via platform. UGS assigns each a permanent <code>PlayerId</code> and a short-lived JWT access token. Every subsequent API call uses this token.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">2</div>
        <div class="step-content">
          <div class="step-title">Create / Join a Lobby</div>
          <div class="step-desc">Player A creates a Lobby on UGS servers — a JSON document in the cloud listing room settings and players. Player B queries for lobbies and joins by Lobby ID or a short join code.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">3</div>
        <div class="step-content">
          <div class="step-title">Allocate a Relay Server</div>
          <div class="step-desc">The Host (Player A) calls Relay to allocate a relay server slot. Relay returns a <code>JoinCode</code>. Host saves this JoinCode into the Lobby's custom data so all lobby members can read it.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">4</div>
        <div class="step-content">
          <div class="step-title">Client Fetches & Joins Relay</div>
          <div class="step-desc">Player B polls or subscribes to the Lobby, reads the JoinCode, and calls Relay to join. Both sides now have <code>RelayServerData</code> objects they can hand to Netcode.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">5</div>
        <div class="step-content">
          <div class="step-title">Start Netcode Transport</div>
          <div class="step-desc">Both sides configure <code>UnityTransport</code> with their Relay data and call <code>StartHost()</code> / <code>StartClient()</code>. All game traffic now flows through the Relay DTLS tunnel — no IP exposure.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">6</div>
        <div class="step-content">
          <div class="step-title">Persist & Configure</div>
          <div class="step-desc">Cloud Save stores per-player data (XP, settings, progress). Remote Config lets you tweak game parameters (spawn rates, prices) without a client update.</div>
        </div>
      </div>
    </div>
  </section>


  <!-- ═══════════════════════════════════════════ SECTION 2 -->
  <section class="section" id="prerequisites">
    <div class="section-header">
      <span class="section-num">02</span>
      <h2>Prerequisites & Setup</h2>
    </div>

    <p>Before touching Unity, set up your accounts and tools. Missing any of these is the #1 reason tutorials fail silently.</p>

    <h3>What You Need</h3>

    <div class="steps">
      <div class="step">
        <div class="step-num">✓</div>
        <div class="step-content">
          <div class="step-title">Unity Account (free)</div>
          <div class="step-desc">Go to <a href="https://id.unity.com">id.unity.com</a> and create an account. This is the identity that owns your cloud project. One account = one dashboard. Keep it secure — it controls your billing.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">✓</div>
        <div class="step-content">
          <div class="step-title">Unity Hub 3.x</div>
          <div class="step-desc">Download from <a href="https://unity.com/download">unity.com/download</a>. Hub manages editor versions. Never install Unity editors directly — you'll lose version-switching superpowers.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">✓</div>
        <div class="step-content">
          <div class="step-title">Unity Editor 2023.2 LTS or 6 (6000.x)</div>
          <div class="step-desc">Install via Hub. UGS SDK 2.x is best-supported on these versions. <strong>Do not use 2022.x</strong> — several UGS packages require minimum 2023.1 API surface. LTS = Long Term Support = patches keep coming.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">✓</div>
        <div class="step-content">
          <div class="step-title">Unity Dashboard</div>
          <div class="step-desc">Navigate to <a href="https://cloud.unity.com">cloud.unity.com</a>. This is the UGS web console where you create projects, enable services, and set credentials. <strong>You will live here.</strong></div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">✓</div>
        <div class="step-content">
          <div class="step-title">Git (Optional but Strongly Recommended)</div>
          <div class="step-desc">Initialize a git repo before adding packages. The <code>Library/</code> folder will be 3–5 GB after imports. Your <code>.gitignore</code> must exclude it or you'll commit hundreds of megabytes.</div>
        </div>
      </div>
    </div>

    <div class="callout warn">
      <div class="callout-label">⚠ Billing Gotcha</div>
      <p>UGS has a free tier (Spark plan) that covers ~100 MAU. You will NOT be charged during development, but you need to watch your dashboard. The Relay service bills per GB of relayed data. A single developer testing will never exceed the free tier — but add real players and monitor it.</p>
    </div>
  </section>


  <!-- ═══════════════════════════════════════════ SECTION 3 -->
  <section class="section" id="project-setup">
    <div class="section-header">
      <span class="section-num">03</span>
      <h2>Unity Project Setup</h2>
    </div>

    <p>Create a fresh 3D (or 3D Core) project. The template doesn't matter much for cloud work — we care about the scripting backend and package manager.</p>

    <h3>Critical Project Settings</h3>

    <p>After creating the project, immediately go to <strong>Edit → Project Settings → Player</strong> and configure:</p>

    <div class="code-block">
      <div class="code-header"><span class="code-lang">Project Settings</span><button class="code-copy" onclick="copyCode(this)">Copy</button></div>
      <pre>Company Name:  YourStudio           <span class="cmt">// affects bundle ID</span>
Product Name:  CloudPOC
Bundle ID:     com.yourstudio.cloudpoc

Scripting Backend:   IL2CPP          <span class="cmt">// REQUIRED for production builds</span>
API Compatibility:   .NET Standard 2.1</pre>
    </div>

    <div class="callout warn">
      <div class="callout-label">⚠ Why IL2CPP Matters</div>
      <p>Mono scripting backend works fine in the editor, but UGS SDK packages internally depend on IL2CPP code stripping behaviour in builds. Always test your actual build — editor play mode can mask missing assembly definitions that IL2CPP strips away. Add a <code>link.xml</code> if you see serialization errors in builds.</p>
    </div>

    <h3>The link.xml File</h3>
    <p>Create this at <code>Assets/link.xml</code> to prevent IL2CPP from stripping UGS assemblies:</p>

    <div class="code-block">
      <div class="code-header"><span class="code-lang">XML — Assets/link.xml</span><button class="code-copy" onclick="copyCode(this)">Copy</button></div>
      <pre><span class="str">&lt;linker&gt;</span>
  <span class="str">&lt;assembly</span> <span class="kw">fullname</span>=<span class="str">"Unity.Services.Core"</span> <span class="kw">preserve</span>=<span class="str">"all"</span><span class="str">/&gt;</span>
  <span class="str">&lt;assembly</span> <span class="kw">fullname</span>=<span class="str">"Unity.Services.Authentication"</span> <span class="kw">preserve</span>=<span class="str">"all"</span><span class="str">/&gt;</span>
  <span class="str">&lt;assembly</span> <span class="kw">fullname</span>=<span class="str">"Unity.Services.Lobby"</span> <span class="kw">preserve</span>=<span class="str">"all"</span><span class="str">/&gt;</span>
  <span class="str">&lt;assembly</span> <span class="kw">fullname</span>=<span class="str">"Unity.Services.Relay"</span> <span class="kw">preserve</span>=<span class="str">"all"</span><span class="str">/&gt;</span>
  <span class="str">&lt;assembly</span> <span class="kw">fullname</span>=<span class="str">"Unity.Services.CloudSave"</span> <span class="kw">preserve</span>=<span class="str">"all"</span><span class="str">/&gt;</span>
  <span class="str">&lt;assembly</span> <span class="kw">fullname</span>=<span class="str">"Unity.Services.RemoteConfig"</span> <span class="kw">preserve</span>=<span class="str">"all"</span><span class="str">/&gt;</span>
  <span class="str">&lt;assembly</span> <span class="kw">fullname</span>=<span class="str">"Unity.Netcode.Runtime"</span> <span class="kw">preserve</span>=<span class="str">"all"</span><span class="str">/&gt;</span>
<span class="str">&lt;/linker&gt;</span></pre>
    </div>

    <h3>Connect to Unity Cloud</h3>
    <p>Go to <strong>Edit → Project Settings → Services</strong>. Sign in with your Unity account, then either create a new cloud project or link to an existing one. This writes a <code>ProjectID</code> and <code>EnvironmentID</code> into your project settings — the SDK reads these at runtime to know which UGS tenant to hit.</p>

    <div class="insight">
      <div class="insight-label">🧠 Environments Insight</div>
      <p>UGS has Environments (Production, Development, custom). <strong>Always develop in a non-Production environment.</strong> Your Lobby data, Cloud Save data, Remote Config values and even your player accounts are siloed per environment. Switching from Dev to Production resets everyone's data. Create a "Development" environment first and never ship builds that point to Production until you're ready.</p>
    </div>
  </section>


  <!-- ═══════════════════════════════════════════ SECTION 4 -->
  <section class="section" id="ugs-dashboard">
    <div class="section-header">
      <span class="section-num">04</span>
      <h2>UGS Dashboard</h2>
    </div>

    <p>The UGS Dashboard at <a href="https://cloud.unity.com">cloud.unity.com</a> is your operations center. Here's what you must do before writing code:</p>

    <div class="steps">
      <div class="step">
        <div class="step-num">1</div>
        <div class="step-content">
          <div class="step-title">Create a Project</div>
          <div class="step-desc">Dashboard → Projects → New Project. Name it clearly. The Project ID (a UUID) is what the SDK uses — don't confuse it with the display name.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">2</div>
        <div class="step-content">
          <div class="step-title">Enable Each Service</div>
          <div class="step-desc">Navigate to each service (Authentication, Lobby, Relay, Cloud Save, Remote Config) and click "Enable". Services that aren't enabled return <code>403 Forbidden</code> — a confusing error when you don't know why.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">3</div>
        <div class="step-content">
          <div class="step-title">Create Your Environments</div>
          <div class="step-desc">Dashboard → Environments. Create "development" and later "production". Set <strong>development</strong> as the active environment in Unity editor via Project Settings → Services → Environment.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">4</div>
        <div class="step-content">
          <div class="step-title">Configure Authentication Providers</div>
          <div class="step-desc">Dashboard → Authentication → Settings. Enable "Anonymous" for now. Later add Apple, Google, Steam, etc. Each provider needs its own client ID/secret configured here.</div>
        </div>
      </div>
      <div class="step">
        <div class="step-num">5</div>
        <div class="step-content">
          <div class="step-title">Seed Remote Config Values</div>
          <div class="step-desc">Dashboard → Remote Config. Add a key like <code>max_players</code> = <code>4</code>. You'll fetch this at runtime. If the key doesn't exist in the dashboard, the SDK returns a default you define in code.</div>
        </div>
      </div>
    </div>

    <div class="callout danger">
      <div class="callout-label">🔥 Do Not Ship</div>
      <p>Never hardcode your Project ID, API keys, or service credentials in client-side code that ships to players. Your Project ID is semi-public (it's in builds anyway), but any server-side keys or admin tokens must live in Cloud Code or your backend — never in the client binary.</p>
    </div>
  </section>


  <!-- ═══════════════════════════════════════════ SECTION 5 -->
  <section class="section" id="packages">
    <div class="section-header">
      <span class="section-num">05</span>
      <h2>Package Installation</h2>
    </div>

    <p>Open the Package Manager (<strong>Window → Package Manager</strong>). Switch to "Unity Registry". Install these packages in order — some have dependencies that will resolve automatically:</p>

    <div class="pkg-grid">
      <div class="pkg-card">
        <div class="pkg-name">com.unity.services.core</div>
        <div class="pkg-desc">The root SDK. Initializes all UGS services. Must be installed first.</div>
      </div>
      <div class="pkg-card">
        <div class="pkg-name">com.unity.services.authentication</div>
        <div class="pkg-desc">Player sign-in and identity. Depends on core.</div>
      </div>
      <div class="pkg-card">
        <div class="pkg-name">com.unity.services.lobby</div>
        <div class="pkg-desc">Room creation, discovery, and matchmaking metadata.</div>
      </div>
      <div class="pkg-card">
        <div class="pkg-name">com.unity.services.relay</div>
        <div class="pkg-desc">NAT punch-through server allocation for P2P without IP exposure.</div>
      </div>
      <div class="pkg-card">
        <div class="pkg-name">com.unity.services.cloudsave</div>
        <div class="pkg-desc">Per-player (and public) key-value persistence in the cloud.</div>
      </div>
      <div class="pkg-card">
        <div class="pkg-name">com.unity.services.remoteconfig</div>
        <div class="pkg-desc">Fetch server-side config values without a client update.</div>
      </div>
      <div class="pkg-card">
        <div class="pkg-name">com.unity.netcode.gameobjects</div>
        <div class="pkg-desc">The Netcode for GameObjects (NGO) multiplayer framework.</div>
      </div>
      <div class="pkg-card">
        <div class="pkg-name">com.unity.transport</div>
        <div class="pkg-desc">Low-level transport layer. NGO + Relay both depend on this.</div>
      </div>
    </div>

    <p>Alternatively, edit your <code>Packages/manifest.json</code> directly — faster and reproducible:</p>

    <div class="code-block">
      <div class="code-header"><span class="code-lang">JSON — Packages/manifest.json (dependencies section)</span><button class="code-copy" onclick="copyCode(this)">Copy</button></div>
      <pre>{
  <span class="str">"dependencies"</span>: {
    <span class="str">"com.unity.services.core"</span>:           <span class="str">"1.13.0"</span>,
    <span class="str">"com.unity.services.authentication"</span>:  <span class="str">"3.3.3"</span>,
    <span class="str">"com.unity.services.lobby"</span>:           <span class="str">"1.2.2"</span>,
    <span class="str">"com.unity.services.relay"</span>:           <span class="str">"1.3.1"</span>,
    <span class="str">"com.unity.services.cloudsave"</span>:       <span class="str">"3.2.1"</span>,
    <span class="str">"com.unity.services.remoteconfig"</span>:   <span class="str">"4.1.1"</span>,
    <span class="str">"com.unity.netcode.gameobjects"</span>:     <span class="str">"1.9.1"</span>,
    <span class="str">"com.unity.transport"</span>:               <span class="str">"2.3.0"</span>
  }
}</pre>
    </div>

    <div class="callout info">
      <div class="callout-label">💡 Version Pinning</div>
      <p>Always pin exact versions in your manifest. UGS packages have had breaking API changes between minor versions (the lobby subscription API changed in 1.1.x → 1.2.x). Pin, then bump intentionally and read the changelog.</p>
    </div>
  </section>