arborist/docs/diagrams/mesh-epoch-lifecycle.dot
russell@unturf.com 8d6961fcc1
aborist/arborist
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// arborist/mesh — epoch state machine.
//
// Every roster mutation bumps a counter. Old epochs persist forever
// (signatures stay verifiable). New gossip is encrypted under the
// post-rotation secret, so evicted members go opaque from epoch+1.
//
// Render: dot -Tpng docs/diagrams/mesh-epoch-lifecycle.dot -o /tmp/x.png
digraph mesh_epoch_lifecycle {
rankdir=LR;
bgcolor="white";
node [shape=box, style="rounded,filled", fontname="Helvetica"];
edge [fontname="Helvetica", fontsize=10];
none [label="no mesh state\n(meta.mesh.enabled = 0)", fillcolor="#eeeeee"];
e0 [label="epoch 0\nfounder = sole admin\nreason: 'genesis'", fillcolor="#fff7d6"];
e1 [label="epoch N\nroster + envelope\nsigned by actor", fillcolor="#d6ffd6"];
eN [label="epoch N+1\nfresh secret\nfresh envelope", fillcolor="#d6ffd6"];
historic [label="every prior epoch\nstays on disk\n(roster + signatures verifiable)", fillcolor="#ffffff", shape=note];
none -> e0 [label="arborist mesh init --group <name>"];
e0 -> e1 [label="add | kick | rotate"];
e1 -> eN [label="add | kick | rotate"];
eN -> eN [label="rotate (no roster change)"];
e1 -> historic [style=dashed, arrowhead=none, color="#888888"];
eN -> historic [style=dashed, arrowhead=none, color="#888888"];
subgraph cluster_ops {
label="Operator commands";
style="rounded,dashed";
color="#666666";
node [fillcolor="#e8f0ff", shape=note];
op_add [label="arborist mesh add\n--member-id bob ...\nadmin only"];
op_kick [label="arborist mesh kick\n--member-id bob ...\nadmin only"];
op_rotate [label="arborist mesh rotate\nany current member"];
}
}