<mxfile host="app.diagrams.net" agent="architecture-deliverables" version="24.0.0">
  <diagram name="Data Architecture and Ownership Zones" id="17-data-architecture">
    <mxGraphModel dx="1400" dy="900" background="#ffffff" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="1660" pageHeight="890" math="0" shadow="0">
      <root>
        <mxCell id="0" />
        <mxCell id="1" parent="0" />
        <mxCell id="_box1" value="On device — system of record for plaintext" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#b85450;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#b85450;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="80" width="1570" height="170" as="geometry" />
        </mxCell>
        <mxCell id="_box2" value="Conversation data" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="60" y="110" width="750" height="120" as="geometry" />
        </mxCell>
        <mxCell id="n.lchat" value="&lt;b&gt;Chat Database&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;SQLCipher, full history&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="150" y="140" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.lmedia" value="&lt;b&gt;Media Cache&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Decrypted blobs&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="350" y="140" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.lidx" value="&lt;b&gt;Search Index&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Local only&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="560" y="140" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box3" value="Cryptographic material" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="850" y="110" width="750" height="120" as="geometry" />
        </mxCell>
        <mxCell id="n.lsess" value="&lt;b&gt;Session &amp; Ratchet State&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1030" y="140" width="180" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.lid" value="&lt;b&gt;Identity Private Key&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Hardware backed&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1240" y="140" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box4" value="Server — transient, rebuildable" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="270" width="1570" height="170" as="geometry" />
        </mxCell>
        <mxCell id="_box5" value="In flight" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="60" y="300" width="750" height="120" as="geometry" />
        </mxCell>
        <mxCell id="n.sund" value="&lt;b&gt;Undelivered Ciphertext&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;TTL 30 d&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="140" y="330" width="180" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.sq" value="&lt;b&gt;Delivery Queue&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Per device&lt;/font&gt;" style="shape=process;size=0.08;whiteSpace=wrap;html=1;fillColor=#ffe6cc;strokeColor=#d79b00;fontColor=#4a3200;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="360" y="330" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.sblob" value="&lt;b&gt;Media Blob&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;TTL 30 d&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="560" y="330" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box6" value="Ephemeral state" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="850" y="300" width="750" height="120" as="geometry" />
        </mxCell>
        <mxCell id="n.spres" value="&lt;b&gt;Presence&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;TTL 60 s&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="930" y="330" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.styp" value="&lt;b&gt;Typing State&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;TTL 10 s&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1140" y="330" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.ssess" value="&lt;b&gt;Socket Registry&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Rebuilt on reconnect&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1340" y="330" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="_box7" value="Server — durable metadata, never content" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="470" width="1570" height="170" as="geometry" />
        </mxCell>
        <mxCell id="_box8" value="Account and social graph" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="60" y="500" width="750" height="120" as="geometry" />
        </mxCell>
        <mxCell id="n.dacc" value="&lt;b&gt;Account &amp; Device Registry&lt;/b&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="110" y="530" width="200" height="50" as="geometry" />
        </mxCell>
        <mxCell id="n.dgrp" value="&lt;b&gt;Group &amp; Community Metadata&lt;/b&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="340" y="530" width="200" height="50" as="geometry" />
        </mxCell>
        <mxCell id="n.dblk" value="&lt;b&gt;Block &amp; Privacy Settings&lt;/b&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="580" y="530" width="190" height="50" as="geometry" />
        </mxCell>
        <mxCell id="_box9" value="Keys and safety" style="rounded=1;arcSize=3;whiteSpace=wrap;html=1;fillColor=none;strokeColor=#6c8ebf;dashed=1;dashPattern=8 8;verticalAlign=top;align=left;spacingLeft=12;spacingTop=6;fontSize=11;fontStyle=2;fontColor=#5b7fa6;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="850" y="500" width="750" height="120" as="geometry" />
        </mxCell>
        <mxCell id="n.dpk" value="&lt;b&gt;Public Prekey Bundles&lt;/b&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="930" y="530" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.dvault" value="&lt;b&gt;Backup Key Vault&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;HSM, rate limited&lt;/font&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;fontColor=#3a2b44;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1130" y="530" width="170" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.dabuse" value="&lt;b&gt;Abuse &amp; Report Records&lt;/b&gt;&lt;br&gt;&lt;font style=&quot;font-size:10px;color:#5b6b7d&quot;&gt;Retention 90 d&lt;/font&gt;" style="shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=11;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#1e3a1e;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="1340" y="530" width="180" height="70" as="geometry" />
        </mxCell>
        <mxCell id="n.ocloud" value="&lt;b&gt;Cloud Backup Providers&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#f5f5f5;strokeColor=#8c8c8c;fontColor=#333333;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="640" y="670" width="180" height="50" as="geometry" />
        </mxCell>
        <mxCell id="n.ocdn2" value="&lt;b&gt;CDN Edge Cache&lt;/b&gt;" style="rounded=1;arcSize=8;whiteSpace=wrap;html=1;fillColor=#f5f5f5;strokeColor=#8c8c8c;fontColor=#333333;fontSize=12;fontFamily=Segoe UI;verticalAlign=middle;align=center;" vertex="1" parent="1">
          <mxGeometry x="850" y="670" width="170" height="50" as="geometry" />
        </mxCell>
        <mxCell id="_e10" value="encrypted backup" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;dashed=1;dashPattern=1 4;endArrow=block;endFill=1;strokeColor=#9673a6;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.lchat" target="n.ocloud">
          <mxGeometry relative="1" as="geometry">
            <Array as="points">
              <mxPoint x="240" y="270" />
              <mxPoint x="790" y="270" />
              <mxPoint x="790" y="640" />
              <mxPoint x="730" y="640" />
            </Array>
          </mxGeometry>
        </mxCell>
        <mxCell id="_e11" value="origin pull" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.sblob" target="n.ocdn2">
          <mxGeometry relative="1" as="geometry">
            <Array as="points">
              <mxPoint x="650" y="470" />
              <mxPoint x="790" y="470" />
              <mxPoint x="790" y="640" />
              <mxPoint x="940" y="640" />
            </Array>
          </mxGeometry>
        </mxCell>
        <mxCell id="_e12" value="drained on delivery" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;dashed=1;endArrow=open;endFill=0;strokeColor=#d79b00;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=0;exitDx=0;exitDy=0;entryX=0.5;entryY=1;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.sund" target="n.lchat">
          <mxGeometry relative="1" as="geometry" />
        </mxCell>
        <mxCell id="_e13" value="key escrow, user held" style="edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;jettySize=auto;orthogonalLoop=1;endArrow=block;endFill=1;strokeColor=#5a6570;strokeWidth=1.4;fontSize=10;fontColor=#42536a;labelBackgroundColor=#ffffff;verticalAlign=bottom;fontFamily=Segoe UI;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="n.dvault" target="n.ocloud">
          <mxGeometry relative="1" as="geometry">
            <Array as="points">
              <mxPoint x="1220" y="640" />
              <mxPoint x="730" y="640" />
            </Array>
          </mxGeometry>
        </mxCell>
        <mxCell id="title" value="Data Architecture and Ownership Zones" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=20;fontStyle=1;fontColor=#16202c;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="20" width="1570" height="30" as="geometry" />
        </mxCell>
        <mxCell id="rule" value="" style="line;strokeWidth=1;html=1;strokeColor=#c9d3de;" vertex="1" parent="1">
          <mxGeometry x="40" y="50" width="1570" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg14" value="" style="rounded=1;arcSize=30;html=1;fillColor=#d5e8d4;strokeColor=#82b366;" vertex="1" parent="1">
          <mxGeometry x="40" y="800" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg15" value="Data store" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="70" y="800" width="70" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg16" value="" style="rounded=1;arcSize=30;html=1;fillColor=#e1d5e7;strokeColor=#9673a6;" vertex="1" parent="1">
          <mxGeometry x="160" y="800" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg17" value="Security / platform" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="190" y="800" width="110" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg18" value="" style="rounded=1;arcSize=30;html=1;fillColor=#ffe6cc;strokeColor=#d79b00;" vertex="1" parent="1">
          <mxGeometry x="320" y="800" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg19" value="Queue / topic" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="350" y="800" width="80" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg20" value="" style="rounded=1;arcSize=30;html=1;fillColor=#f5f5f5;strokeColor=#8c8c8c;" vertex="1" parent="1">
          <mxGeometry x="460" y="800" width="20" height="10" as="geometry" />
        </mxCell>
        <mxCell id="_lg21" value="External / third party" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="480" y="800" width="130" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg22" value="" style="html=1;endArrow=none;dashed=1;dashPattern=1 4;strokeColor=#9673a6;strokeWidth=1.4;" edge="1" parent="1">
          <mxGeometry relative="1" as="geometry">
            <mxPoint x="640" y="810" as="sourcePoint" />
            <mxPoint x="660" y="810" as="targetPoint" />
          </mxGeometry>
        </mxCell>
        <mxCell id="_lg23" value="batch" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="660" y="800" width="40" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg24" value="" style="html=1;endArrow=none;strokeColor=#5a6570;strokeWidth=1.4;" edge="1" parent="1">
          <mxGeometry relative="1" as="geometry">
            <mxPoint x="720" y="810" as="sourcePoint" />
            <mxPoint x="750" y="810" as="targetPoint" />
          </mxGeometry>
        </mxCell>
        <mxCell id="_lg25" value="synchronous" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="750" y="800" width="70" height="20" as="geometry" />
        </mxCell>
        <mxCell id="_lg26" value="" style="html=1;endArrow=none;dashed=1;strokeColor=#d79b00;strokeWidth=1.4;" edge="1" parent="1">
          <mxGeometry relative="1" as="geometry">
            <mxPoint x="840" y="810" as="sourcePoint" />
            <mxPoint x="870" y="810" as="targetPoint" />
          </mxGeometry>
        </mxCell>
        <mxCell id="_lg27" value="event / async" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#7b8794;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="870" y="800" width="80" height="20" as="geometry" />
        </mxCell>
        <mxCell id="note" value="Everything above the durable band is rebuildable or expendable. Losing it costs delivery latency, not history." style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=10;fontColor=#8a97a5;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="830" width="1570" height="20" as="geometry" />
        </mxCell>
        <mxCell id="foot-rule" value="" style="line;strokeWidth=1;html=1;strokeColor=#e3e9ef;" vertex="1" parent="1">
          <mxGeometry x="40" y="850" width="1570" height="10" as="geometry" />
        </mxCell>
        <mxCell id="foot" value="v 1.0   ·   owner Platform Architecture   ·   date 2026-08" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;whiteSpace=wrap;fontSize=9;fontColor=#9aa7b4;fontFamily=Segoe UI;" vertex="1" parent="1">
          <mxGeometry x="40" y="860" width="1570" height="10" as="geometry" />
        </mxCell>
      </root>
    </mxGraphModel>
  </diagram>
</mxfile>
