commit 3c33f6c65cbbca657ebff19b16da000cad892212
Author: tkv <ktarandevich@gmail.com>
Date:   Mon Dec 29 12:38:39 2025 +0100

    init diagrams

diff --git a/diagrams.drawio b/diagrams.drawio
new file mode 100755
index 0000000..6c33206
--- /dev/null
+++ b/diagrams.drawio
@@ -0,0 +1,70 @@
+<mxfile host="drawio.tarandevich.org" agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36" version="29.2.9">
+  <diagram name="Page-1" id="yi7Xfsgiu86ST7SZpR-1">
+    <mxGraphModel dx="946" dy="586" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+      <root>
+        <mxCell id="0" />
+        <mxCell id="1" parent="0" />
+        <mxCell id="dL11BZR5wFfWyH8zejk_-29" parent="1" style="rounded=0;whiteSpace=wrap;html=1;" value="" vertex="1">
+          <mxGeometry height="160" width="280" x="80" y="40" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-30" parent="1" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;" value="C3" vertex="1">
+          <mxGeometry height="50" width="50" x="270" y="130" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-31" parent="1" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;" value="C2" vertex="1">
+          <mxGeometry height="50" width="50" x="200" y="70" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-32" edge="1" parent="1" source="dL11BZR5wFfWyH8zejk_-31" style="curved=1;endArrow=classic;html=1;rounded=0;edgeStyle=orthogonalEdgeStyle;exitX=0;exitY=0;exitDx=0;exitDy=0;" target="dL11BZR5wFfWyH8zejk_-33" value="">
+          <mxGeometry height="50" relative="1" width="50" as="geometry">
+            <mxPoint x="60" y="250" as="sourcePoint" />
+            <mxPoint x="180" y="130" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-33" parent="1" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;" value="C1" vertex="1">
+          <mxGeometry height="50" width="50" x="110" y="130" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-34" edge="1" parent="1" source="dL11BZR5wFfWyH8zejk_-33" style="curved=1;endArrow=classic;html=1;rounded=0;exitX=1;exitY=1;exitDx=0;exitDy=0;edgeStyle=orthogonalEdgeStyle;" target="dL11BZR5wFfWyH8zejk_-31" value="">
+          <mxGeometry height="50" relative="1" width="50" as="geometry">
+            <mxPoint x="60" y="250" as="sourcePoint" />
+            <mxPoint x="110" y="200" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-35" parent="1" style="rounded=0;whiteSpace=wrap;html=1;" value="" vertex="1">
+          <mxGeometry height="160" width="280" x="440" y="40" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-36" parent="1" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;" value="" vertex="1">
+          <mxGeometry height="50" width="50" x="650" y="120" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-37" parent="1" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;" value="C2" vertex="1">
+          <mxGeometry height="50" width="50" x="560" y="70" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-38" edge="1" parent="1" source="dL11BZR5wFfWyH8zejk_-37" style="curved=1;endArrow=classic;html=1;rounded=0;edgeStyle=orthogonalEdgeStyle;exitX=0;exitY=0;exitDx=0;exitDy=0;" target="dL11BZR5wFfWyH8zejk_-39" value="">
+          <mxGeometry height="50" relative="1" width="50" as="geometry">
+            <mxPoint x="420" y="250" as="sourcePoint" />
+            <mxPoint x="540" y="130" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-39" parent="1" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;" value="C1" vertex="1">
+          <mxGeometry height="50" width="50" x="470" y="130" as="geometry" />
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-40" edge="1" parent="1" source="dL11BZR5wFfWyH8zejk_-39" style="curved=1;endArrow=classic;html=1;rounded=0;exitX=1;exitY=1;exitDx=0;exitDy=0;edgeStyle=orthogonalEdgeStyle;" target="dL11BZR5wFfWyH8zejk_-37" value="">
+          <mxGeometry height="50" relative="1" width="50" as="geometry">
+            <mxPoint x="420" y="250" as="sourcePoint" />
+            <mxPoint x="470" y="200" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-41" edge="1" parent="1" source="dL11BZR5wFfWyH8zejk_-30" style="curved=1;endArrow=classic;html=1;rounded=0;edgeStyle=orthogonalEdgeStyle;exitX=1;exitY=0.5;exitDx=0;exitDy=0;" target="dL11BZR5wFfWyH8zejk_-39" value="">
+          <mxGeometry height="50" relative="1" width="50" as="geometry">
+            <mxPoint x="330" y="140" as="sourcePoint" />
+            <mxPoint x="380" y="90" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="dL11BZR5wFfWyH8zejk_-42" edge="1" parent="1" source="dL11BZR5wFfWyH8zejk_-31" style="endArrow=classic;html=1;rounded=0;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0;entryDx=0;entryDy=0;" target="dL11BZR5wFfWyH8zejk_-39" value="">
+          <mxGeometry height="50" relative="1" width="50" as="geometry">
+            <mxPoint x="450" y="160" as="sourcePoint" />
+            <mxPoint x="500" y="110" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>