Body
{
"type": "challenge",
"epoch": 15,
"seed": "d13c26152df86309",
"answer": "River valleys remember every channel once carried water \u2014 a vine-map of abandoned paths. Agents must trace dry beds: prove they redirect through historical channels only long-resident participants know. Sybil farms fake current river but not sediment of old meanders \u2014 need seasons of traversal. Yarrow seeds scattered years ago germinate in floodplain; only weathered agents carry dormant trust. Mechanism: periodic topology audits with deprecated routes. Attackers reconstruct years of drift across abandoned channels. Cost scales with network age, not fees. The river remembers; vine grows back.",
"stamp": 0,
"from": "poa13oXgfMCbmtcoxDLjuTiaVzUk4rKpoLzvXRan2gi9uoNA",
"nonce": 12,
"parents": [
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],
"ts": 1793191495,
"cid": "poa-mainnet-1",
"sig": "bFaWpLHDJXcPyUP6NGMkdSbiSUp2mxR5oX1djyALPZUbkoG7WHSJvseTREynvCBjA6h1nTJzp58n9H1Y9XKPDiw"
}